Pulse or digital communications inventions 07/06

20060165155 - System and method for ultra-wideband (uwb) communication transceiver: An ultra-wideband (UWB) transceiver for use in UWB communication includes a voltage-controlled oscillator (VCO) configured to periodically and sequentially generate a series of base frequencies based on a predetermined sequence and a waveform generator to generate carrier waves based on the generated base frequencies....

20060165156 - Radio receiver apparatus: In order to perform diversity reception efficiently without increasing the scale of the apparatus, when the total number of simultaneously connected cells has reached N cells including an HSDPA serving cell a control section 104 keeps a switch 103 connecting a buffer 102-1 to a despreading section 105, and conversely,...

20060165157 - System and method for pn correlation and symbol synchronization: A method is disclosed for PN correlation and symbol synchronization of a spread spectrum signal at a receiver when a symbol boundary of the spread spectrum signal is not on a PN epoch or is otherwise unknown. The method includes the operation of modulating the spread spectrum signal with a...

20060165158 - Signal regeneration: Described herein is a method for signal regeneration, particularly, of the signal type transmitted by cellular base stations used in cellular telephone network systems. It is sometimes necessary to regenerate an accurate replica of a transmitted signal, by removing any errors that are present and/or compensate for any degradation that...

20060165159 - Method for transmitting digital electrical signals: The invention relates to methods for transmitting information, in particular to communication interfaces of electronic devices. The inventive method makes it possible to extend a communication distance and liability improving noise immunity by compensating a noise signal in both wires of a communication line. Said method consists in grounding the...

20060165160 - Wireless event authentication system: A wireless data acquisition and recording (DAR) system includes acquisition circuitry including a video camera and/or a microphone carried by an operator for capturing video and audio events viewed and/or heard by the operator. A wireless transmitter wirelessly transmits digital signals containing the video events captured by the video camera...

20060165161 - Communication system for home automation using advanced adsl: Communication system for home automation using advanced asymmetric digital subscriber line (ADSL) is provided. Communication system for home automation using advanced ADSL includes: a home automation communication server means for providing home automation service; a home automation service channel means for interchanging data through wire or wireless line of baseband...

20060165165 - Rate control in a video encoder: Described herein is a rate controller in a video system. The rate controller is comprised of a bit count estimator and a quantization selector. The bit count estimator receives an input to an encoder and generates a bit count estimate. The bit count estimate is an approximation of a bit...

20060165164 - Scratch pad for storing intermediate loop filter data: A video processing apparatus and methodology are implemented as a combination of a processor and a video decoding hardware block to decode video data by providing the video decoding block with an in-loop filter and a scratch pad memory, so that the in-loop filter may efficiently perform piecewise processing of...

20060165163 - Video encoding: The invention relates to a video encoder (201) for encoding a video signal. The video encoder comprises a segmentation processor (207) which divides the picture into picture regions. Preferably, picture regions having a high degree of flatness or uniformity are determined in this way. A characteristics processor (209) determine a...

20060165166 - System and process for controlling the coding bit rate of streaming media data employing a limited number of supported coding bit rates: A system and process for controlling the coding bit rate of streaming media data is presented where a server streams data that exhibits one of a number of coding bit rates supported by the server. Initially, the server chooses the coding bit rate. However, after this startup period, the client...

20060165167 - Moving picture encoding method, moving picture decoding method, moving picture encoding device, moving picture decoding device, and computer program: There is provided a moving picture encoding method based on hierarchical encoding. The method includes the step of encoding a time filtering lower hierarchical signal belonging to a lower hierarchy among signals of respective hierarchies which have been subjected to time-direction filtering and then to hierarchical division and an upper...

20060165172 - Method for transmitting data without jitter in synchronous ethernet: Disclosed is a method for transmitting asynchronous data in a synchronous Ethernet having a sync frame section and an async frame section. The method includes the steps of: a) allocating a priority to motion picture data for transmission through the sync frame section; b) determining if a size of the...

20060165171 - Method of effectively predicting multi-layer based video frame, and video coding method and apparatus using the same: A method and apparatus are provided for effectively predicting a video frame that use all of the advantages of an intra mode and an intra BL mode in multi-layer structure based-video coding. The method includes reconstructing the intra block of a lower layer using the previously reconstructed first neighboring blocks...

20060165173 - Method of managing mpeg-4 object information in mpeg-2 transport stream: Disclosed is a method of managing a Motion Picture Expert Group-2 Transport Stream (MPEG-2 TS) in an object unit of an MPEG-4 by efficiently matching the MPEG-4 with the MPEG-2 TS, in order to broadcast an internet protocol (IP). The method manages MPEG-4 object information in an MPEG-2 TS status,...

20060165168 - Multipass video rate control to match sliding window channel constraints: An encoder and corresponding method are disclosed for performing video rate control to meet network traffic model restrictions, including pre-encoding the sequence of pictures for each of a plurality of quantization parameter values, selecting for each picture of the sequence one of the plurality of quantization parameter values responsive to...

20060165170 - Prediction intra-mode selection in an encoder: A prediction mode for encoding data is selected using a reduced number of rate-distortion cost computations. This reduction in rate-distortion cost computations is caused by filtering the number of potential intra prediction modes based on two criteria. First, the number of potential prediction modes is reduced based on at least...

20060165169 - Spatio-temporal graph-segmentation encoding for multiple video streams: A multiple video stream capture and encoding apparatus produces compressed data that represents multiple video streams capturing a common scene. Inages from multiple video streams are analyzed to identify image color segments that are encoded into a composite graph data structure. Corresponding image segments across the multiple video streams are...

20060165178 - Generating a motion attention model: Systems and methods to generate a motion attention model of a video data sequence are described. In one aspect, a motion saliency map B is generated to precisely indicate motion attention areas for each frame in the video data sequence. The motion saliency maps are each based on intensity I,...

20060165176 - Method and apparatus for encoder assisted-frame rate up conversion (ea-fruc) for video compression: An Encoder Assisted Frame Rate Up Conversion (EA-FRUC) system that utilizes video coding and pre-processing operations at the video encoder to exploit the FRUC processing that will occur in the decoder in order to improve compression efficiency and reconstructed video quality is disclosed. One operation of the EA-FRUC system involves...

20060165177 - Mode decision system and method for motion vector fine search: A mode decision system and method for motion vector fine search. Each macroblock in a frame has a pre-determined clock number. The system includes a first subtractor, an operation level generator and a determinator. The first subtractor has a first input terminal to receive a clock number and a second...

20060165175 - Motion estimation with fast search block matching: A video encoder and corresponding method are provided for encoding video signal data for an image block and a particular reference picture index to predict the image block, where the encoder includes a fast search block motion estimator for providing motion vectors corresponding to the at least one particular reference...

20060165174 - Processing or compressing n-dimensional signals with warped wavelet packets and bandelets: A method and apparatus for processing or compressing an n-dimensional digital signal by constructing a sparse rep resentation which takes advantage of the signal geometrical regularity. The invention comprises a warped wavelet packet transform which performs a cascade of warped subband filtering along wraping grids of sampling points adapted to...

20060165179 - Acquisition of image sequences with enhanced resolution: A method for electronic imaging includes controlling an image sensor to capture a first sequence of first input images at a first frame rate having a first spatial resolution, and to capture a second sequence of second input images, interleaved with the first sequence and having a second spatial resolution...

20060165162 - Method and system for reducing the bandwidth access in video encoding: A method and a system for reducing the bandwidth access in video encoding are disclosed. The illuminance of the search area and the illuminance of the current macro block for motion estimation are fetched from a memory by a motion estimation module. The motion estimation is performed by finding the...

20060165180 - Transcoder device for transcoding compressed and encoded bitstream of motion picture in syntax level and motion picture communication system: A transcoder device includes means for receiving encoding information transmitted from a motion-picture encoding and transmitting device and decoding information transmitted from a motion-picture receiving and decoding device, referring to the encoding information and the decoding information to determine whether the syntax in a video packet transmitted from the motion-picture...

20060165181 - Piecewise processing of overlap smoothing and in-loop deblocking: A video processing apparatus and methodology are implemented as a combination of a processor and a video decoding hardware block to decode video data by performing piecewise processing of overlap smoothing and in-loop deblocking in a macroblock-based fashion. With this approach, a smaller on-board memory may be used for the...

20060165182 - Motion picture encoder, motion picture decoder, and method for generating encoded stream: The present invention restricts the arrangement of parameter sets to enable a stream to be easily decoded on the basis of random accesses. In a stream including a plurality of first units each containing unit identification information and image compressed data as well as a reference target unit information, and...

20060165183 - Image compression apparatus and image compression method: An image compression apparatus of this invention has an input unit configured to input image data of a moving picture, a first encoding processor configured to apply compression-encoding processing to the image data input from the input unit using a plurality of compression-encoding modes, a remaining battery level management unit...

20060165184 - Audio coding using de-correlated signals: A multi-channel signal having at least three channels can be reconstructed such, that the reconstructed channels are at least partly de-correlated from each other using a downmixed signal derived from an original multi-channel signal and a set of de-correlated signals provided by a de-correlator (101) that derives the set of...

20060165185 - Communication system with low power, dc-balanced serial link: A data communication system comprises a transmission line between first and second integrated circuits. An encoder on the first integrated circuit encodes an input data stream to produce a sequence of codewords, wherein codewords in the sequence are members of a set of codewords representing data in the input data...

20060165186 - High speed communication system with a feedback synchronization loop: In a communications device having a physical layer device and a processing device connected to the physical layer device, the number of input/output (I/O) ports required for communication between the devices in the gigabit range is substantially reduced by utilizing millivolt differential I/O drivers and receivers. In addition, a calibration...

20060165189 - Adaptive modulation scheme and coding rate control method: A radio communication system for enabling control of a modulation scheme following variation in the propagation channel and control of a coding rate in a small amount of delay and arithmetic operation. In order to attain the object explained above, a transmitter station and a receiver station use in common...

20060165188 - Method for sending channel quality information in a multi-carrier radio communication system, corresponding mobile terminal and base station: The present invention relates to a method for sending channel quality information in a multi-carrier radio communication system comprising at least one mobile terminal and at least one base station, said channel quality information being sent on a signaling channel by said mobile terminal to said base station. According to...

20060165187 - Multiplex signal error correction method and device: A method of reducing a phase error caused by a plurality of error sources in a signal which is present in a digital frequency representation in the form of a sequence of a plurality of digital partial signals which are associated with a number of subcarriers (k) of a carrier....

20060165190 - Adaptive modulation method and coding rate control method: In a radio communication system, transmitter and receiver stations share information on a maximum number of bits communicated per symbol. The transmitter station encodes a signal with sufficient error correcting capabilities to create a codeword. The transmitter station allocates the bits from the codeword to each symbol, modulates the symbols...

20060165191 - Mimo channel feedback protocols: Handshaking protocols, techniques, and structures are presented for use in implementing closed loop MIMO using explicit feedback in a wireless network....

20060165192 - Wireless communication system, receiver, demodulation method used for the system and receiver, and program thereof: In a wireless communication system having a receiver which receives, through plural reception antennae, signals transmitted from plural transmission antennae, bit likelihood can be surely calculated without requiring a selection processing. A transmitter has M transmission antennae, and transmits signals through the transmission antennae, respectively. A receiver has N reception...

20060165193 - Method for transmitting signals in a radio communication system: The invention relates to a method for transmitting signals in a radio communication system consisting of at least two frequency signal-transmitting channels. At least the first (fcoord) of said frequency channels is used for organising radio resources, and at least the second (fi) of the frequency channels is used for...

20060165194 - Data sending device, data receiving device, and data transmission method: The data sending device (10) receives input biphase-mark-encoded sending data which is output from an apparatus on the sending side, and a biphase decoding section (12) biphase-mark-decodes the input sending data. The output data from the biphase decoding section (12) is transmitted to a data receiving device via a sending...

20060165195 - A low power, dc-balanced serial link: A receiver for a data communication system which comprises a transmission line between first and second integrated circuits. An encoder on the first integrated circuit encodes an input data stream to produce a sequence of codewords, wherein codewords in the sequence are members of a set of codewords representing data...

20060165196 - Mode-controlled receiver methods and structures: Receiver embodiments are disclosed that can process a wide range of transmission bandwidths over a wide range of transmission frequencies and provide reduced converter sampling rates, filter bandwidths, and filter tuning ranges and enhanced signal-to-noise performance. They convert transmission signals with quadrature local oscillator signals whose frequencies are commanded to...

20060165197 - Synchronous follow-up device and method: A replica generation section 103 performs multicarrier demodulation of a known signal of a received signal and generates a replica. A delay profile generation section 104 calculates a correlation value between the replica and the received signal and generates a delay profile. An integral value calculation section 105 integrates the...

20060165198 - Direct rf complex analog to digital converter: An analog to digital converter device that includes a sample rate reduction system configured to sample a radio frequency (RF) signal. The RF signal has a bandwidth centered at a first frequency. The sample rate reduction system is configured to directly sample the RF signal at a sampling rate that...

20060165199 - Communication device: It is an object of the invention to provide a communication apparatus that can perform gain control without deteriorating an S/N ratio of signals after diversity processing. A communication apparatus according to the invention includes: a comparison unit (11) that compares gain set values calculated and outputted by AGC control...

20060165201 - Method and apparatus for recording time information for digital data streams: A recording medium, an apparatus and a method for recording time information of digital data streams are provided. The apparatus in one embodiment includes a time information creating unit creating a first time field and a second time field, wherein the first time field includes a 90 KHz unit value...

20060165200 - Synchronization device and device for generating a synchronization signal: A synchronization device for determining a position of a synchronization signal in a receive signal, the synchronization signal being based on a coarse synchronization signal and a fine synchronization signal, includes a signal processing means configured to determine, based on the coarse synchronization signal, a section of the receive signal...

20060165202 - Signal processor for robust pattern recognition: A front-end processor that is robust under adverse acoustic condition is disclosed. The front-end processor includes a frequency analysis module configured to compute the short-time magnitude spectrum, a adaptive noise cancellation module to remove any additive noise, a linear discriminant module to reduce the dimension of feature vectors and to...

20060165205 - Digital transmit phase trimming: A circuit has a phase adjustment circuit to generate an adjusted clock signal by adjusting a first clock signal in accordance with a control signal. A multiplexer receives input data signals on a plurality of first data lines and outputs onto at least one second data line output data signals...

20060165204 - Method and apparatus for multi-mode clock data recovery: The disclosed invention is a technology for producing a recovered clock signal using a multi-mode clock data recovery (CDR) circuit that accommodates a flexible range operating frequencies F and consecutive identical digit requirements CID. In a first mode of operation, a controlled oscillator produces the recovered clock signal, and in...

20060165203 - Waveform generation: A waveform generator for generating a smooth version of an original waveform which contains abrupt transitions, includes a phase accumulator incremented at successive sampling times to produce an output representative of the phase of the original waveform, a phase scaler arranged to convert the residual contents of the accumulator following...

20060165206 - Phase locked loop circuit, electronic device including a phase locked loop circuit and method for generating a periodic signal: A phase locked loop (PLL) circuit (1) comprising a loop input (11); a phase detector section (2) for detecting a phase difference between an input signal and a reference signal. The phase detector section (2) has a detector input connected to the loop input, a reference input and a detector...

20060159158 - Contactless connector systems: A system and method uses near-field or inductively coupled UWB (Ultra Wide Band) systems to implement high speed electrical data connectors without the need for a direct electrical connection. A data connector system has a first connector portion and a second connector portion. The first connector portion comprises a UWB...

20060159157 - Digital spread spectrum clock signal generation: To generate a spread frequency spectrum clock signal in a digital approach permitting to make the key parameters independent of process, temperature and supply voltage variations, a digital phase locked loop is used. In a first step (a), a clock signal at a maximum clock frequency is generated. In a...

20060159159 - Wireless communication system and device for controlling the peak to average power ratio: A wireless communication system, to control a peak power to an average power ratio because an amplifier characteristic of the wireless communication system include non-linear characteristic if input signal large the amplifier makes distortions. A wireless communication system comprises for suppressing a peak power to an average power ratio to...

20060159160 - Optimal weights for mmse space-time equalizer of multicode cdma system: Aspects of the invention provide an enhanced chip-level linear space-time equalizer 118 for multiple-input-multiple-output (MIMO) multi-code CDMA systems reusing same spreading codes in different transmit antennas 114. Reuse of the spreading codes at the transmitter 104, 204 creates an on-time inter-stream interference component (or cross-talk among distinct transmit antenna signals)...

20060159161 - Positioning signal reception device and control method of positioning signal reception device: A positioning signal reception device receives a positioning signal transmitted from a position information satellite, and includes: a signal reception portion that obtains a reception signal by receiving the positioning signal; an A/D conversion portion that generates a digital signal by converting the reception signal into a digital form; a...

20060159162 - System and method for improving dsl performance: A system and method is described for determining a condition of a communication line, such as the absence of a filter device on a digital subscriber line (DSL). A first signal characterized by a high upstream power is activated over the line, and a first set of parameters associated with...

20060159163 - Bit rate determination circuit based on low bit rate signal: A bit-rate discrimination circuit for determining which bit-rate an input signal has, a first bit-rate or a second bit-rate higher than the first bit-rate, is disclosed. The circuit is characterized by a frequency selection unit configured to filter out a signal having the second bit-rate, and allow at least a...

20060159164 - Multi-camera surveillance system and method for using the same: An improved multi-camera surveillance system for use on a vehicle such as an aircraft, and a method for implementing the same. The multi-camera surveillance system is capable of displaying a user-selected image from any camera or user-selected images from multiple cameras at multiple viewing stations by flight and cabin crew,...

20060159168 - Method and apparatus for encoding pictures without loss of dc components: Disclosed herein is a method of encoding moving pictures or still pictures involving dividing a single frame into a plurality of blocks and encoding the blocks. The method includes: calculating an average value of pixels constituting the blocks, shifting down the pixels by the calculated average value, performing lossy encoding...

20060159169 - Moving pictures encoding with constant overall bit-rate: A method and apparatus control bit rates used in a moving pictures encoder, such as an MPEG standard encoder. A sequence of moving pictures is divided into segments each of which comprises one or more groups of pictures. A constant overall bit rate is specified for the sequence of pictures,...

20060159165 - Picture coding method and picture decoding method: The picture coding method of the present invention is a picture coding method for coding a picture on a block-by-block basis, comprising: a selection step of selecting one of at least two sizes as a size of a block on which orthogonal transformation should be performed; a transformation step of...

20060159166 - Use of out of order encoding to improve video quality: Described herein is a video encoder that includes a memory unit, a selector, and an encoding processor. The memory unit stores a plurality of pictures. The selector accesses the plurality of pictures in the memory unit. The selector initially accesses a first picture, followed by another picture, followed by one...

20060159167 - Video decoding method and device for inverse quantization and zigzag scan: A video decoding device and method for an inverse quantization and zigzag scan, which includes a receive unit having a counter for receiving at least one pixel and accumulating a counter value as an index of the pixel, and a process unit for retrieving a quantization parameter and a storing...

20060159170 - Method and system for hierarchical search with cache: A method and system for hierarchical search with a cache are disclosed. After a level 1 search area and a current macro block are loaded from a memory system, the cache stores a portion of the level 1 search area. Level 1 motion can be estimated by finding a best...

20060159171 - Buffer-adaptive video content classification: Described herein is a video system with adaptive buffering comprising a video encoder and a motion estimator is presented. The motion estimator classifies content of one or more pictures. The video encoder allocates an amount of data for encoding another one or more pictures based on the content of the...

20060159172 - Video signal encoding apparatus and video data encoding method: A video signal encoding apparatus comprises a decoding unit for decoding each compression still image data into a frame image; a supplementary information, extracting unit for extracting supplementary information added to each compression frame image data; a motion prediction process adoption judging unit for judging, on the basis of the...

20060159178 - Apparatus and method for digital image stabilization: The invention provides a digital image stabilization apparatus for compensating a jitter occurred in the ith frame among N frames of a video sequence, where each of the N frames includes a plurality of blocks, N is a natural number larger than or equal to 3 and i is an...

20060159179 - Image transform for video coding: A method is disclosed for decomposing a set of even and odd pictures into low-band and high-band pictures respectively in a image decomposing unit, in which the even picture is used by at least two prediction motion compensators on which the output signal of each prediction motion compensator is scaled...

20060159176 - Method and apparatus for deriving motion vectors of macroblocks from motion vectors of pictures of base layer when encoding/decoding video signal: During scalable MCTF encoding of a video signal divided into base and enhanced layers, a first derivative vector of a first motion vector, obtained through motion estimation, of an image block in an arbitrary frame in the enhanced layer is obtained based on the product of a derivation factor and...

20060159174 - Method and device for encoding moving picture: A moving picture encoding method capable of using a reference frame number in multi-frame motion prediction and variable-length code reference frame information corresponding to the number includes the steps of: calculating a reference frequency of the reference frame; acquiring, with the reference frequency, reference frame identification information so that a...

20060159177 - Motion estimation method, device, and system for image processing: A motion estimation method is provided for processing successive images in an image sequence, with a motion vector being associated with each of the processed images. For a current image, motion vectors associated with images that precede the current image in the sequence are selected. Candidate motion vectors are generated...

20060159175 - Motion-compensated image signal interpolation: A motion-compensated image signal interpolation unit (200) for generating an interpolated image being located at a first predetermined temporal distance (a) from the first image and being located at a second predetermined temporal distance (1−a) from the second image is disclosed. The interpolation unit (200) comprises: motion estimation means (202)...

20060159173 - Video coding in an overcomplete wavelet domain: Encoding and decoding methods and apparatuses are provided for encoding and decoding video frames. The encoding method (600) and apparatus (110) use motion compensated discrete cosine transform coding for the base layer and inband motion compensated temporal filtering in the overcomplete wavelet domain for the enhancement layer. The decoding method...

20060159180 - Video encoder, video decoder, video encoding method, video decoding method, and video encoding and decoding system: A method and a video decoder for decoding an encoded bitstream of video data in a picture encoding and decoding system are disclosed. The video decoder includes a motion compensation unit for calculating a position for a sample image portion using an encoded bitstream of video data having a motion...

20060159181 - Method for encoding and decoding video signal: A method for encoding and decoding a video signal is provided. A video signal is encoded by weighting reference blocks or target blocks in the video signal based on adaptive weights defined on a macroblock by macroblock basis in prediction and update procedures, and such encoded video signal is decoded...

20060159182 - Method and apparatus for decoding a data stream in audio video streaming systems: A method for decoding a data stream containing audio/video substreams and control substreams comprises buffering nodes having the possibility to buffer multiple data packets in the same buffer. This may be achieved by having separate parameters for the allocated buffer size and any stored packet. Thus, not only multiple packets...

20060159183 - Receiver and packet formatter for decoding an atsc dtv signal: A packet formatter for use in a television receiver capable of receiving a dual bitstream signal comprising a standard stream compatible with the Advanced Television Systems Committee (ATSC) standard and a robust stream. The packet formatter comprises: 1) a first processing block capable of receiving the dual bitstream signal and...

20060159184 - System and method of decoding dual video signals: A video decoding system capable of decoding compressed high definition (HD) MPEG video signals incoming from different channels includes a first channel video decoder, a second channel video decoder, a video signal processor and an arbiter, where the first and second channel video decoders decode video streams incoming from different...

20060159185 - Method and device for changing an encoding mode of encoded data streams: A method, a component, a system, and a computer program for changing an encoding mode of an encoded data stream from a first encoding mode to a second encoding mode are disclosed. The encoded data stream at the first encoding mode is represented by first encoding parameters. For the encoding...

20060159186 - Data, power and supervisory signaling over twisted pairs: A system and method for conveying supervisory signaling and power over the same twisted wire pairs in a cable as are used to carry data communications in accordance with a predetermined communications protocol. Supervisory signals having first and second differential components are generated. The first component is coupled to both...

20060159189 - Methods and systems for performing an overlap-and-add operation: A system is provided that includes a first device 110A that transmits an information symbol with a zero-padded suffix (ZPS) and a second device 110B that receives the information symbol with the zero-padded suffix. The second device 110B performs a Fourier transform on at least one sample of the information...

20060159190 - System and method for expanding multi-speaker playback: A method includes splitting and filtering a left input signal and a right input signal to produce a plurality of frequency sub-bands. Each of the frequency sub-bands includes a left sub-band signal and a right sub-band signal. The method also includes processing the left and right sub-band signals associated with...

20060159187 - System and method for utilizing different known guard intervals in single/multiple carrier communication systems: A system and method for a transceiver structure, where Different Known Guard Intervals (DKGI) are appended to multiple, consecutive data blocks and are then used in combination with Channel State Information (CSI) to restore cyclic convolution in the time domain. Once restored, the CSI and cyclic convolution are transformed into...

20060159188 - Wireless communication apparatus and wireless communication method: Disclosed is a wireless communication apparatus which synthesize signals received from a plurality of antennas to separate the signals into synthesis signals of a plurality of logical channels. The apparatus has a first phase corrector correcting a phase of a reception signal by estimating an amount of phase correction by...

20060159191 - Embedded keying: Method of communicating digital data in which frames (8) are transmitted cyclically whereby a first number of symbols is transmitted according to a first keying mode (II) using a first constellation, and a second number of symbols is transmitted according to a second keying mode (L) using a second constellation....

20060159192 - Method and system for a robust initialization symbol for digital duplexing: Provided is a method and system for increasing cyclic prefix and cyclic suffix based upon a fast Fourier transform (FFT) and inverse fast Fourier transform (IFFT). The method includes representing at least one of the one or more DMT symbols in frequency domain to produce a frequency domain representation. The...

20060159193 - Transmitter synchronization in a distributed transmission system: Systems and methods are provided for synchronizing a plurality of transmitters in a distributed transmission system. A data source generates a digital signal. A central data processing component inserts synchronization data into the digital signal. The synchronization data includes a periodic reset signal. A plurality of radio frequency transmitters each...

20060159196 - Apparatus and method for channel estimation and cyclic prefix reconstruction in an ofdm-stbc mobile communication system: An apparatus and method for channel estimation and CP reconstruction in an OFDM-STBC mobile communication system are provided. An ISI canceller cancels ISI signal components from first and second received symbol sequences. A cyclicity restorer cancels ICI signal components from the ISI-cancelled first received symbol sequence and the ISI-cancelled second...

20060159195 - Apparatus using concatenations of signal-space codes for jointly encoding across multiple transmit antennas, and employing coordinate interleaving: A system for transmitting data over a MIMO channel has a transmitter and a receiver. In the transmitter, the input data is encoded over at least two pipes by a concatenation of at least two constituent signal-space encoders. Each constituent encoder is used to generate, in response to the input...

20060159194 - Scalable pre-channel estimate phase corrector, method of correction and mimo communication system employing the corrector and method: The present invention provides a pre-channel estimate phase corrector for use with a multiple-input, multiple-output (MIMO) receiver employing M receive antennas, where M is at least two. In one embodiment, the pre-channel estimate phase corrector includes a training sequence coordinator configured to receive a pattern of training sequences from the...

20060159197 - Radio transmitter with variable amplifier units in the baseband section and in the radio-frequency section of the transmission path: The invention relates to a radio transmitter for the transmission of transmission signals. Signals to be transmitted are processed to form transmission signals by the transmission path of the radio transmitter. A first variable amplifier unit and a second variable amplifier unit are arranged in the transmission path. The first...

20060159198 - Amplifier, information communication apparatus and amplification method: An amplifier includes a modulation coder receiving an original modulation signal and generating an amplitude signal and a phase signal, a voltage adjusting instrument which generates an amplitude modulation signal from the amplitude signal, a carrier generator generating a phase modulation signal from the phase signal, and an amplification device...

20060159199 - Super-orthogonal space-time trellis codes, and applications thereof: A super set of orthogonal space-time block codes is combined with set partitioning to form super-orthogonal space-time trellis codes having full diversity, enhanced coding gains, and improved rates. In communications systems, these codes are implemented by an encoder of a diverse transmitter to send an information signal to a receiver...

20060159200 - Front end interface for data receiver: A data receiver is provided which includes a front end interface circuit having an alternating current (AC) transmission receiving mode and a direct current (DC) transmission receiving mode. The front end interface circuit includes an offset compensation circuit operable to compensate a DC voltage offset between a pair of differential...

20060159201 - Method of reducing the variance of a signal-to-noise ration estimate for a signal with differential phase and coherent amplitude modulation: Characterized in that in order to calculate the samples of the noise power affecting the system, the errors of amplitude and phase increment obtained in the receiver are combined carrying out a translation of those errors (1) and (4) to the corresponding point of the first ring (6) of the...

20060159202 - Frequency converter for a spectral conversion of a start signal and method for a spectral conversion of a start signal: A frequency converter for a spectral conversion of a start signal having a current frequency to an end signal having a target frequency, wherein the start signal includes an I component having a plurality of I component values and a Q component having a plurality of Q component values, comprises...

20060159203 - Method and apparatus for channel estimation of transmission channels with memory in digital telecommunications systems, and corresponding computer-program product: In order to execute, as a function of a received signal (r), a procedure of channel estimation in a transmission channel with memory in a telecommunications system, there is envisaged an operation of estimation of a delay spread associated to said channel, said operation of estimation comprising calculation of a...

20060159204 - Method and system for adaptive channel estimation in pilot symbol assisted modulation systems: A method includes generating a plurality of noise-averaged channel estimates using noisy channel estimates. At least some of the noise-averaged channel estimates are generated using different averaging lengths. The method also includes selecting one of the averaging lengths based on the plurality of noise-averaged channel estimates. The step of selecting...

20060159205 - Device and method for determining a correlation value: A device for determining a correlation value from a correlation between a first sequence of values with complex values and a second sequence of values with complex values has a correlation means for determining a first partial correlation value from a correlation between a first subset of the first sequence...

20060159206 - Device and method for determining a time of arrival of a receive sequence: A device for determining a time of arrival of a receive sequence in a receiver comprises correlation means which is implemented to determine a correlation value sequence from a correlation of the receive sequence with a transmit sequence, wherein the correlation sequence comprises a peak shape having a main maximum...

20060159207 - Mixer for mixing a signal and method for mixing a signal: A mixer for mixing a signal, present as a sequence of time-discrete values with a time interval between two time-discrete values defining a first sampling frequency from a current frequency to a target frequency, includes a first mixer implemented to convert the signal from the current frequency to an intermediate...

20060159208 - Receiver for receiving radio frequency signals: Receivers (1) for receiving radio frequency signals need automatic gain control alignment by hand during the production process, which makes the production process more expensive, more time-consuming and less reliable (insight). By (basic idea) providing receivers (1) with a first and a second gain controller (38, 54) for controlling the...

20060159209 - Multi-pipe synchronizer system: A multi-pipe synchronizer system includes at least two synchronizers for receiving a source signal and corresponding source clock, and a destination clock. A switch is coupled to an input of each synchronizer for coupling the source signal to a selected synchronizer. A generator is coupled to an output of each...

20060159210 - Synchronized signal detector and synchronized signal detecting method: A SYNC detection window creating section creates a SYNC window signal on the basis of the output of a counter counting a synchronized phase detection signal at a WDU cycle and the output of a counter counting WDU at a Segment cycle. On the other hand, a synchronized signal is...

20060159211 - Digital frequency/phase recovery circuit: A digital frequency/phase recovery circuit includes a comparator with hysteresis, a counter, a frequency determiner, a multi-phase clock generator, a transition detector, a phase adjuster, and a multiplexer. The comparator with hysteresis receives the input signal and generates a comparison signal. The counter receives the comparison signal, calculates the pulse...

20060159212 - Method and system for discovering circuits in a network: A method and system for representing a low-order connection and a high-order connection as a single circuit are disclosed. The method includes creating a low-order listener object and a low/high listener object at each end point of the low-order connection and creating a high-order listener object at each end point...

20060159213 - Fault tolerant synchronisation source for excitation control of a three phase power generating system: A fault-tolerant synchronisation source for excitation control of a three-phase generator system that combines point of regulation (POR) signals representing parameters comprising voltage and current for each phase at the POR to generate a fault-tolerant synchronisation signal....

20060159214 - Data-directed frequency-and-phase lock loop: A data-directed frequency-and-phase lock loop for an offset-QAM modulated signal comprises a first multiplier that multiplies the signal by the output of a VCO. The output of the first multiplier is phase-shifted by a second multiplier, then convolved by a third multiplier. The output of the third multiplier is split,...

20060153281 - Method and apparatus for automatic jammer frequency control of surgical reactive jammers: a Method and Apparatus for Automatic Jammer Frequency Control of Surgical Reactive Jammers is disclosed. The system and method to autonomously and selectively jams frequency-hopping signals in near real-time. The system has the ability to automatically detect short duration signals (such as those output from frequency hoppers), to automatically determine...

20060153280 - Method and apparatus for surgical high speed follower jamming based on selectable target direction: A Method and Apparatus for Surgical High-speed Follower Jamming Based on Selectable Target Direction is disclosed. The system and method of the present invention automatically detects and jams sudden, short duration communications signals in near real time, in a compass direction selected by the user on the battlefield. Such a...

20060153279 - Sub-banded ultra-wideband communication system: A wireless communication system performs high-speed transmission of information signals by using a multi-band approach. Each band spans about 500 MHz. A flexible modulation scheme within each band employs time, amplitude and phase modulations, allowing adaptation of the data rate to the sub-band conditions. In addition, pseudo-random frequency sequence is...

20060153282 - Method for transmitting and receiving preamble sequences in an orthogonal frequency division multiplexing communication system using a multiple input multiple output scheme: In an orthogonal frequency division multiplexing (OFDM) communication system using multiple transmit antennas, a first base sequence with a first length is segmented into a first number of second sequences to which different time offsets are applied. Subsequences of a first preamble sequence corresponding to the number of second sequences...

20060153283 - Interference cancellation in adjoint operators for communication receivers: A receiver in a wireless communication system comprises a reverse transform configured to produce a vector of baseband signal values, and a projection canceller configured to project the vector of baseband signal values onto at least one subspace that is substantially orthogonal to an interference subspace. The reverse transform may...

20060153284 - Method and apparatus for a frequency agile variable bandwidth transceiver: A new radio frequency transceiver architecture comprises a combination of direct digital synthesis and digital control functions to control dual switched capacitor filters in order to perform radio frequency conversion directly to and from baseband....

20060153285 - Dynamic interleaver depth change for a general convolutional interleaver: A system and method for changing the data rate over an interleaved latency path. The method overcomes shortfalls of the ADSL2 seamless rate adaptation (SRA) and dynamic rate repartitioning (DRR)....

20060153286 - Low bit rate codec: The present invention relates to improvements of predictive encoding/decoding operations performed on a signal which is transmitted over a packet switched network. The signal is encoded on a block by block basis in such way that a block A-B is predictive encoded independently of any preceding blocks. A start state...

20060153287 - Enhancing video images depending on prior image enhancements: A video stream containing encoded frame-based video information includes a first frame and a second frame. The encoding of the second frame depends on the encoding of the first frame. The encoding includes motion vectors indicating differences in positions between regions of the second frame and corresponding regions of the...

20060153290 - Code conversion method and device thereof: In order to cope with format conversion of user data, the bit rate value and VBV (Video Buffering Verifier) buffer size value in a sequence header of an input code and the VBV delay value in a picture header of the input code are modified to obtain an intermediate code...

20060153291 - Digital video line-by-line dynamic rate adaptation: The present invention provides a method and apparatus for compressing video data for wireless transmission. The invention continually monitors the output of a video data encoder and maintains a running average for the data output rate over multiple lines of video data. The encoder compresses video data on a line-by-line...

20060153288 - Method for compressing and decompressing video image data: A method for compressing and decompressing video image date, wherein the contours of image structures are determined in a basic analysis of the video data contained in a video image by means of sudden modifications of brightness and/or tristimulus value in adjacent pixels; the contours thus found are respectively described...

20060153289 - Multi-display supporting multi-view video object-based encoding apparatus and method, and object-based transmission/reception system and method using the same: Provided are a multi-display supporting multi-view video object-based encoding apparatus and method, and an object-based transmission/reception system and method using the encoding apparatus and method. The encoding apparatus includes: a shape abstracting means for receiving right/left-eye image object video and abstracting right/ left object image, respectively, to abstract the shape...

20060153293 - Method for transcoding compressed data: To control the bit rate, the de-quantization and quantization would spend a lot of valuable time. However, the bit rate would mainly depend on the level of quantization scale, so the bit rate could be controlled just through the manipulation of the quantization scale. The method of the present invention...

20060153294 - Inter-layer coefficient coding for scalable video coding: A scalable video coding method and apparatus for coding a video sequence, wherein the coefficients in the enhancement layer is classified as belonging to a significant pass when the corresponding coefficient in the base layer is zero, and classified as belonging to a refinement pass when the corresponding coefficient in...

20060153295 - Method and system for inter-layer prediction mode coding in scalable video coding: The present invention improves residue prediction by using MI even when the base layer MB is encoded in intra mode such as copying intra 4×4 mode of one 4×4 block in the base layer to multiple neighboring 4×4 blocks in the enhancement layer if the base layer resolution is lower...

20060153296 - Digital video signature apparatus and methods for use with video program identification systems: Digital video signature apparatus and methods for use with video program identification systems are disclosed. The disclosed apparatus and methods identify a video program using a sequence of signatures. Each of the signatures includes a set of centroids corresponding to one of a plurality of frames of the video program....

20060153299 - Coded video sequence conversion apparatus, method and program product for coded video sequence conversion: A decoding section generates a decoded image and a coding parameter set from a first video coded video sequence. A coding parameter set conversion section first sets the coding structure for a pair of upper and lower macro blocks based on the coding structures of the corresponding macro blocks and...

20060153300 - Method and system for motion vector prediction in scalable video coding: In scalable video coding where two predictive motion vectors are calculated: one from the current layer neighboring motion vectors and one from the co-located base layer motion vectors. One of the two predictive motion vectors is chosen as the predictive motion vector for current block. A flag bit is coded...

20060153297 - Mixed inter/intra video coding of macroblock partitions: A video encoder and corresponding method are provided for mixed inter/intra encoding of a macroblock having a plurality of partitions, where the encoder includes a reference picture weighting applicator coupled with a reference picture weighting factor unit for assigning weighting factors corresponding to each of the inter and intra coded...

20060153301 - Nonlinear, in-the-loop, denoising filter for quantization noise removal for hybrid video compression: A method and apparatus is disclosed herein for using an in-the-loop denoising filter for quantization noise removal for video compression. In one embodiment, the video encoder comprises a transform coder to apply a transform to a residual frame representing a difference between a current frame and a first prediction, the...

20060153298 - Predictive encoding of motion vectors including a flag notifying the presence of coded residual motion vector data: The invention relates to a video encoding method applied to a sequence of video frames and generating a coded bitstream in which each data item is described by means of a bitstream syntax allowing any decoder to recognize and decode all the segments of the content of said bitstream. This...

20060153292 - Mode selection techniques for intra-prediction video encoding: In one embodiment, this disclosure provides an encoding device comprising a mode selection engine that performs mode selection for intra-prediction encoding regardless of whether the encoding device is programmed to comply with first encoding standard or a second encoding standard. The device also includes a first encoder to perform the...

20060153302 - Data holding apparatus: A data holding apparatus of the present invention is a data holding apparatus a data holding apparatus used for image processing in which an image is coded or decoded, on a macroblock basis, based on a field structure or a frame structure selected on a macroblock pair basis. This data...

20060153303 - Apparatus and method for video decoding: An apparatus and method for video decoding decodes a coded video bitstream with a smaller buffer to reconstruct a sequence and outputs it for reducing cost. The apparatus comprises a decoding component, a strip buffer and an outputting component. The decoding component receives the coded video bitstream and decodes it...

20060153304 - Segment-based encoding system using residue coding by basis function coefficients: An encoding system includes an encoder that encodes uncompressed video data to form compressed video data and a decoder that decodes the compressed video data to form at least an approximation of the uncompressed video data. The video data comprises a sequence of a plurality of image frames comprising key...

20060153305 - Device for the trans-compression of a digital audiovisual stream in order to adapt same to existing television equipment: The invention relates to a device which can be used for on-the-fly conversion, using a new, unknown method involving the receiver already in place at the user's premises, of a low-bandwidth digital audiovisual stream which is highly compressed (for transport reasons) into another digital audiovisual stream which is less compressed...

20060153306 - Video playing device and control method for setting playing environment thereof: A video playing device includes a TV encoding circuit, a pre-setting circuit, and a video processing circuit. The TV encoding circuit encodes a first picture and generates a VSYNC signal. The pre-setting circuit is electrically connected with the TV encoding circuit, and receives the VSYNC signal to set a pre-setting...

20060153307 - Dynamic adjustment of transfer characteristics as a function of channel characteristics: A method, system and computer program product to adjust transfer rates on conductors in a multi-conductor cable comprising monitoring signals received on each conductor, determining a Signal to Noise Ratio (SNR) for each conductor and adjusting a transfer rate on one or more conductors based on the corresponding SNR. In...

20060153308 - Method and system for dynamic interleaver adaptation scheme in vdsl: The present invention provides a method and apparatus for a new interleaver adaptation scheme that achieves “error free” and zero delay (interleaving-triangular) or near zero delay variation (interleaving-GCI), and with easier implementation but no additional memory required. The dummy insertion methods and systems embodiments of the invention provide an effective...

20060153309 - Gradient based method and apparatus for ofdm sub-carrier power optimization: In one aspect thereof this invention provides a method to increase data throughput in an Orthogonal Frequency Division Multiplex (OFDM) wireless communications system. The method includes modeling data throughput as a function of received Signal to Noise Ratio (SNR) with a sigmoid function to produce a throughput curve characterized as...

20060153310 - Time-domain equalizer for discrete multi-tone based dsl systems with cyclic extension in training: The present invention provides for a method and system to implement time-domain equalizer (TEQ) training to shorten the channel impulse response of twisted copper lines for DMT-based VDSL systems. The coefficients of TEQ are trained when training signal has cyclic extension (CE), such as specified in current VDSL standard and...

20060153311 - Method and system for dynamic interleaver adaptation scheme in vdsl: The present invention provides a method and apparatus for a new interleaver adaptation scheme that achieves “error free” and zero delay (interleaving—triangular) or near zero delay variation (interleaving—GCI), and with easier implementation but no additional memory required. The dummy insertion methods and systems embodiments of the invention provide an effective...

20060153312 - Apparatus and method for space-time frequency block coding in a wireless communication system: A Space-Time-Frequency Block Coding (STFBC) encoding apparatus and method for a wireless communication system are provided. In a transmitter using a plurality of transmit antennas, an encoder encodes an input symbol sequence according to a predetermined space-time coding matrix. An antenna circulator selects one of predetermined permutation matrices according to...

20060153313 - Method and apparatus for minimizing co-channel interference: An approach is provided for minimizing co-channel interference in a communication system is disclosed. A header of a first frame is scrambled based on a first unique word. A header of a second frame is scrambled based on a second unique word. The first frame including the corresponding scrambled header...

20060153315 - Lower complexity layered modulation signal processor: A method and apparatus for transmitting and receiving a coded signal having an upper layer signal and a lower layer signal is disclosed. The method comprises the steps of combining the upper layer signal and the lower layer signal, encoding the combined upper layer signal and lower layer signal, delaying...

20060153314 - Method and apparatus for tailoring carrier power requirements according to availability in layered modulation systems: A method and apparatus transmitting a layered modulation signal having a first signal layer having first signal symbols and a second signal layer having second signal symbols is disclosed. The method comprises the steps of determining a first signal layer modulation carrier power CL at least in part according to...

20060153316 - Fsk receiver having a variable threshold slicer stage and corresponding method: A receiver having a variable threshold slicer stage, comprises a demodulator (14) for providing asynchronously samples of over-sampled raw demodulated data, a shift register (60) for delaying the over-sampled data by up to 2 bit periods. Samples in stages (62, 72) corresponding to substantially the mid-points in two successive bit...

20060153317 - Digital video broadcasting terrestrial receivers and methods that select channels and fast fourier transform windows: Digital video broadcasting terrestrial (DVB-T) receivers include a fast Fourier transformer that is configured to generate a frequency domain signal from a demodulated DVB-T signal using a range of a window, and an equalizer that is configured to equalize the frequency domain signal according to a channel selection to generate...

20060153318 - Memoryless spectrum correction algorithm for non-ideal i/q demodulators: An algorithm for correcting the output of an analog I/Q demodulator without the need for calibration or storing state information. The output of the analog I/Q demodulator is digitized, and the discrete-time samples are divided into segments. A digital frequency transform (e.g., a Discrete Fourier Transform) is computed for each...

20060153319 - Receiver hardware reduction for spatially independent signals and associated methods: A communications device includes an antenna array comprising antenna elements for receiving at least N spatially independent signals, and a receiver coupled to the antenna array. The receiver includes an analog receiver circuit for receiving the N spatially independent signals, and has a bandwidth of at least N times an...

20060153320 - Rf parameterized steerable antenna: Provided is a steerable antenna for directing an RF output signal to a source from which an RF input signal was received. In particular, incoming phase measurements are used to calculate a phase offset. The phase offset is associated with the source and stored for subsequent use. The phase offsets...

20060153321 - Device for implementing a sum of products expression: A device for implementing a sum-of-products expression includes a first set of 2-input Shift-and-Add (2SAD) blocks receiving a coefficient set/complex sum-of-products expression for generating a first set of partially optimized expression terms by applying recursive optimization therein, a second set of 1-input Shift-and-Add (1SAD) blocks receiving response from the 2SAD...

20060153323 - Clock generation device and clock generation method: Upon reception of digital broadcast, system clocks which follow PCR data of an MPEG2-TS are provided. Upon disc playback, system clocks as fixed clocks are provided. To this end, upon processing the MPEG2-TS, first clocks CK1 synchronized with the PCR data are generated. If the user designates playback using high-precision...

20060153322 - Method and system for synchronization between transmitter and receiver in a communication system: A method and system for synchronization between a transmitter and a receiver in a communication system is provided. The receiver receives a plurality of signals from the transmitter. According to this method, a frequency burst is detected in the received signal at the receiver. The detected frequency burst is then...

20060153324 - Modulation of a pilot carrier, and means to perform this modulation: For synchronisation purposes, a transmitter (TX) multiplexes a pilot carrier with carriers whereon data elements (DATA) are modulated, and transmits the pilot carrier together with the modulated carriers to a receiver (RX). The immunity of the pilot carrier for interferers, such as radio amateur signals, is improved by modulating the...

20060153325 - System clock distributing apparatus and system clock distributing method: To provide a system clock distributing apparatus and a system clock distributing method for reducing a skew of a system clock and a synchronizing signal at low cost. The system clock distributing apparatus for matching the timing of data by using the synchronizing signal includes an oscillator 1 that generates...

20060153326 - Serial data communication apparatus and methods of using a single line: Serial data communication methods and apparatus using a single line are provided. The data communication methods may include: setting a rising edge of a serial pulse signal so that a cycle of the serial pulse signal begins therefrom; setting a falling edge of the serial pulse signal within the cycle...

20060146913 - Tdma, spread spectrum rf agile filtered signal transmission: Communication and broadcast system for Time Division Multiple Access (TDMA), spread spectrum, filtered signal and cross-correlated in-phase and quadrature-phase baseband signals for Radio Frequency (RF) tunable or RF agile transmitters. A selector and connection device provides selection and connection of one or more of the TDMA, spread spectrum, filtered or...

20060146914 - Method and apparatus for frequency hopping medium access control in a wireless network: A method and apparatus for medium access control in a receiver is shown, involving frequency hopping through each of a plurality of channel frequencies for the receiver, monitoring a baseband section of the receiver using a data quality detector (DQD) circuit configured to assert a DQD signal when valid data...

20060146916 - Adaptive frame durations for time-hopped impulse radio systems: A method determines a duration of a frame in a time-hopping, impulse radio system. Channel state information of a channel between two transceivers is estimated periodically. A signal to noise and interference ratio is also estimated periodically. The frame duration of the frame is then determined according to the channel...

20060146915 - Linear receivers for time-hopping impulse radio systems: In a time-hopped impulse radio system, each symbol is transmitted over a channel having different multipath components as a set of Nf frames. Each frame includes one pulse. All frames of a received signal corresponding to the symbol are sampled to generate Nfa×L samples, where L is the number of...

20060146917 - Multi-mode transmitter circuit for switching over between tdma mode and cdma mode: A multi-mode transmitter circuit is provided for selectively switching over between a TDMA mode and a CDMA mode, where a transmission frequency of the CDMA mode is substantially identical to a transmission frequency of the TDMA mode. In the TDMA and CDMA modes, a filter device attenuates frequency band components...

20060146918 - Delay lock loops for wireless communication systems: Techniques for deriving sample timing for multiple signal instances received on multiple antennas for a given propagation path. In one scheme, a DLL is maintained for each path, and each DLL tracks the timing of the best signal instance for the assigned path. In another scheme, a DLL is maintained...

20060146919 - Transmission of protection commands to a remote tripping device: The present invention is concerned with the transmission of protection commands to a remote tripping device over an analog signal link with a limited number of tones or frequencies (F1, F2, F3, F4). Different operating principles involve a number of frequency detectors (41, 42, 43, 44) depending on the number...

20060146920 - Scheduling apparatus and method in a multicarrier communication system: In multicarrier communication system using N subcarriers, in which a transmitter communicates with K receivers, the transmitter determines a channel quality information (CQI) feedback quantity indicative of the number of subcarriers for which CQIs will be fed back among the N subcarriers, for the K receivers, and transmits the CQI...

20060146923 - Automatic switching between dsl and analog on a single rj-11 dsl/analog combo modem: A modem for providing both DSL and analog signal connection capability with a single RJ-11 jack via an automatic switching mechanism. The switching mechanism is controlled by software, which is responsive to user connection preference (i.e., for DSL or analog connection) and/or the detection that a DSL service is available....

20060146921 - Multi-mode signal modification circuit with common mode bypass: A signal modification circuit is provided for use with multi-mode formatted data in accordance with a common mode component and a high frequency component formatted in accordance with a differential mode. The circuit includes an active module that modifies the high frequency component to generate a modified and enhanced high...

20060146922 - System and method for improving bit-loading in discrete multitone-based digital subscriber line modems: A system and method for improving bit-loading in discrete multitone (DMT)-based digital subscriber line (DSL) modems. In one embodiment, the system includes: (1) a model generator configured to generate a model containing a calculated total bit loading for an assumed gross coding gain and estimated total bit loadings for a...

20060146924 - Method and apparatus for automated correlation of digital modulation impairment: A method and apparatus for automated correlation of digital modulation impairment is described. The technique obtains soft decision data (116, 2502) and extracts signal space location information of sufficient resolution to distinguish different types of impairment to a digitally modulated signal. The technique applies an error vector magnitude mask (117,...

20060146926 - Adaptive equalization with group delay: Methods, apparatuses, and systems are presented for performing adaptive equalization involving receiving a signal originating from a channel associated with inter-symbol interference, filtering the signal using a filter having a plurality of adjustable tap weights to produce a filtered signal, and adaptively updating each of the plurality of adjustable tap...

20060146925 - Transform-domain sample-by-sample decision feedback equalizer: A method for performing equalization on an input signal in a receiver creates multiple delayed samples of the input signal and orthogonally transforms each of the delayed input samples before weighting them using transformed adaptive coefficients. The weighted orthogonally-transformed delayed input samples are summed along with a feedback signal and...

20060146927 - System for, and method of, processing quadrature amplitude modulated signals: Analog signals encoded with quadrature amplitude modulation (QAM) pass through a coaxial cable at a particular baud rate. These signals have a carrier frequency individual to the TV station being received. They are mixed with signals from a variable frequency oscillator to produce signals at a particular intermediate frequency (IF)....

20060146930 - Method and apparatus for encoding and decoding image data: A method and apparatus for encoding and decoding image data. The method of encoding image data includes spatially predicting pixel values of a one-dimensional block of an image using blocks spatially adjacent to the one-dimensional block or temporally predicting the pixel values of the one-dimensional block using a temporally previous...

20060146928 - Method and apparatus for providing a rate control: The present invention discloses a system and method for providing a rate control to an encoder, e.g., a H.264/MPEG-4 AVC compliant encoder. Specifically, the rate control method computes a target rate for a segment, where the segment comprises at least one slice of macroblocks. In turn, a target rate is...

20060146929 - Method and system for acceleration of lossy video encoding owing to adaptive discarding poor-informative macroblocks: Disclosed herein is a method for acceleration of video encoding owing to adaptive discarding macroblocks is based on objective regularities between numerical characteristics used on successive stages of lossy encoding process. This method enables to avoid a large amount of computation and transformation being not necessary due to the fact...

20060146931 - Method and apparatus for low-complexity spatial scalable encoding: A video encoder and method are disclosed, the encoder for receiving high-resolution video and providing compressed high-resolution scalable and standard-resolution bitstreams, and including a standard-resolution encoder, a selector coupled with the standard-resolution encoder for selecting between a signal indicative of the received high-resolution sequence and a signal indicative of a...

20060146932 - Method and apparatus for providing motion estimation with weight prediction: The present invention discloses an apparatus and method for providing a motion estimation method with weight prediction that requires less memory and computation cycles. In one embodiment, the weight is applied to pixels of a current slice or picture instead of the reference picture. In doing so, the number of...

20060146933 - Method and system for video motion processing in a microprocessor: Methods and systems for processing video data are disclosed herein and may comprise offloading motion estimation, motion separation, and motion compensation macroblock functions from a central processor to at least one on-chip processor for processing. For a current macroblock, reference video information may be generated via the on-chip processor by...

20060146934 - Video coding: encoding (146) a second complete frame by forming a bit-stream containing information for its subsequent full reconstruction the information being prioritised into high and low priority information enabling the second complete frame to be fully reconstructed on the basis of the virtual frame rather than on the basis of the...

20060146935 - Method and apparatus for sub-pixel motion compensation: A method of motion compensation for an input block is disclosed. The method generally includes the steps of (A) generating a plurality of tap values in response to a motion vector for the input block, (B) generating an interpolated block by programmable filtering a reference block using the tap values,...

20060146936 - Adaptive coefficient scan order: A digital media codec adaptively re-arranges a coefficient scan order of transform coefficients in accordance with the local statistics of the digital media, so that the coefficients can be encoded more efficiently using entropy encoding. The adaptive scan ordering is applied causally at encoding and decoding to avoid explicitly signaling...

20060146937 - Adaptive coefficient scan order: Encoding and decoding methods and apparatuses are provided for encoding and decoding video frames. The encoding method (700) and apparatus (110) use three dimensional lifting in an overcomplete wavelet domain to compress video frames. The decoding method (800) and apparatus (118) also use three dimensional lifting in the overcomplete wavelet...

20060146938 - Method for improved entropy coding: The invention is related to entropy coding/decoding of transform coefficient data in video compression systems. For entropy coding coefficients representing a block in a video image, a preferred embodiment of the present invention introduces events combining the position of the last non-zero coefficient in the block with whether the absolute...

20060146939 - Offset buffer for intra-prediction of digital video: Encoding digital video frames in intra-prediction mode by selecting reference data locations for blocks adjacent a current block identified by a writing pointer using reading pointer offsets added to the writing pointer. The reading pointer offsets include separate offsets for even and odd macro block rows of the frame that...

20060146940 - Spatial error concealment based on the intra-prediction modes transmitted in a coded stream: Spatial concealment of errors in an intra picture comprised of a stream of macroblocks is achieved by predicting the missing data in a macroblock based on an intra prediction mode specified in neighboring block. In practice, when macroblocks within a stream are coded by a block based coding technique, such...

20060146941 - Deblocking control method considering intra bl mode and multilayer video encoder/decoder using the same: A deblocking filter used in a video encoder/decoder based on a multilayer is disclosed. The deblocking filtering method includes choosing a present block and its neighboring block on which a deblocking filtering will be performed, judging whether the present block and the neighboring block have been coded by the intra...

20060146942 - Arrangement for compensation of ground offset in a data bus system: A description is given of an arrangement for compensation of ground offset in a data bus system comprising a plurality of communication devices (2, 10) which are each supplied with an operating voltage (U0) by a voltage source (4; 14), are connected to ground (G1); G2) and have a data...

20060146948 - Adaptive pilot allocation method and apparatus for use in a communication system: A method and apparatus are provided for adaptively allocating pilots in a pilot-aided channel estimation system. A multipath delay is measured between a base station (BS) and a mobile station (MS). A distribution density of pilots of a signal to be transmitted between the BS and the MS is controlled....

20060146943 - Apparatus and related methods to aid in system identification in a heterogeneous communication system environment: An apparatus and associated methods to aid in system identification in a heterogeneous communication environment is generally described herein....

20060146947 - Method and circuit for detecting guard intervals in ofdm communication systems: A circuit for detecting a guard interval in an orthogonal frequency division multiplication (OFDM) communication system, using two successive autocorrelation calculations for a received sample train. The circuit determines a guard interval by calculating the maximum correlation value first autocorrelation calculation step (delaying an OFDM signal by the length of...

20060146945 - Method and system for channel equalization and crosstalk estimation in a multicarrier data transmission system: Improved techniques for concurrent channel equalization and far-end crosstalk channel compensation (e.g., estimation and/or cancellation) in a multicarrier data transmission system are disclosed. The improved techniques can produce coefficients for an electronic filter that provide channel equalization and for an electronic filter that provides cancellation of the far-end crosstalk. These...

20060146946 - Method of determining a metric for evaluating the transmission quality of a data frame transmitting by a communication system: The present invention concerns a method of determining a metric for evaluating an error probability of a data frame transmitted by a first device to a second device through communication channels, a data frame comprising a plurality of symbols, wherein the metric is determined at least from at least one...

20060146949 - Multicarrier communication system and methods for communicating with subscriber stations of different bandwidth profiles: A multicarrier base station communicates with subscriber stations of different bandwidth profiles by allocating time slots in downlink and uplink frames and subcarriers of a single multicarrier communication channel to various bandwidth subchannels....

20060146944 - System and method of processing frequency-diversity signals with reduced-sampling-rate receiver: A system and method of frequency-diversity OFDM with a sampling rate less than the Nyquist rate for ultra-wideband devices are described. The channel encoder is used to encode at least one input data stream to a plurality of codewords. The evaluation device coupled to the channel encoder and having a...

20060146953 - Method and apparatus for estimating transmit weights for multiple antennas: An approach for determining antenna weights in a multiple antenna communication system is provided. The approach jointly optimizes the transmitter weights and the receiver filter. A filter of a receiver (e.g., Linear Minimum Mean Square Error (LMMSE)) is optimized using initial weight values of the transmit antennas. The cost function,...

20060146950 - Reduced complexity detector for multiple-antenna systems: A reduced-complexity maximum-likelihood detector that provides a high degree of signal detection accuracy while maintaining high processing speeds. A communication system implementing the present invention comprises a plurality of transmit sources operable to transmit a plurality of symbols over a plurality of channels, wherein the detector is operable to receive...

20060146952 - Scalable post-channel estimate phase corrector, method of correction and mimo communication system empolying the corrector and method: The present invention provides a post-channel estimate phase