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Bandwidth Reduction Or Expansion

Bandwidth Reduction Or Expansion patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

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Pulse Or Digital Communications


Bandwidth Reduction Or Expansion



Reception signal processing device and method for processing reception signal
11/27/14 - 20140348219 - A reception signal demodulation device which converts a modulated reception signal into a digital signal and performs signal reconstruction includes a demodulator which demodulates the received signal, a matched filter which improves a signal-to-noise power ratio of the signal from the demodulator, a threshold value discriminator which determines a compression...

Methods and apparatus for all digital multi-level outphasing using bandwidth reduction
11/13/14 - 20140334531 - For use in a transmitter in a wireless network, a transmitter apparatus is configured for digital multi-level outphasing. The apparatus includes a bandwidth reduction (BWR) modulator block configured to receive a phase modulated carrier and reduce a bandwidth of the phase modulated carrier using amplitude modulation. The apparatus also includes...

Generating a plurality of streams
09/18/14 - 20140269893 - A device can include a stream builder configured to encode media data at a plurality of different coding rates and to generate a plurality of streams encapsulating the encoded media data. Each of the plurality of streams can have an associated protection level that corresponds to an ability of packet...

Method and a system for a receiver design in bandwidth constrained communication systems
09/18/14 - 20140269894 - The present invention relates to a method of improving the performance in bandwidth constrained communication systems while reducing the complexity of the equalizer used for information retrieval, as well as to improving the capacity of communication systems. The said properties are achieved by appropriate information encoding, prior to signal shaping...

Method of transmitting data samples with reduced bandwidth
09/11/14 - 20140254656 - Methods and apparatus are disclosed for compressing and decompressing data to reduce bandwidth requirements in transmissions of predistorted signals between a processing node and a remote transmitting node of a power amplifier with digital predistortion (PA-DPD) system. In the processing node, predistorted signals are decomposed into a high-dynamic range signal...

Low power long range transmitter
08/07/14 - 20140219329 - A transmitter device arranged to encode a set of digital input data into a succession of modulated chirps, whereby said digital input data are encoded according to a Gray code into codewords (320, 321, 322) having a plurality of bits, and having an interleaver that distributes the bits (C00, ....

Method and apparatus for wideband spectrum sensing using compressive sensing
07/17/14 - 20140198836 - Disclosed is a method for wideband spectrum sensing using compressive sensing, the method including: acquiring a sampling signal by applying a modulated wideband converter (MWC) to a received signal; and acquiring a restoration signal corresponding to the received signal by using a compressive sensing restoration algorithm from the sampling signal,...

Methods and systems for chip-to-chip communication with reduced simultaneous switching noise
07/17/14 - 20140198837 - Systems and methods are described for transmitting data over physical channels to provide a high speed, low latency interface such as between a memory controller and memory devices with significantly reduced or eliminated Simultaneous Switching Output noise. Controller-side and memory-side embodiments of such channel interfaces are disclosed which do not...

Enhanced buffering of soft decoding metrics
07/10/14 - 20140192857 - A method includes, in a receiver, computing soft decoding metrics for decoding a received signal. The soft decoding metrics are stored in compressed form in a memory buffer. The soft decoding metrics in the compressed form are retrieved from the memory buffer, the retrieved soft decoding metrics are decompressed, and...

Method and apparatus for disabling compression for incompressible flows
06/12/14 - 20140161171 - Methods and apparatus for wireless communication include applying a compression algorithm to a data flow, and evaluating a level of compression of the data flow resulting from the applying of the compression algorithm. Further aspects include determining when the level of compression of the data flow is below a first...

System and methods for video and audio data distribution
04/17/14 - 20140105270 - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when,...

System and methods for video and audio data distribution
04/17/14 - 20140105271 - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when,...

Decoding a coded data block
03/27/14 - 20140086302 - Method, receiver and computer program product for decoding a coded data block received at the receiver are disclosed. A first plurality of coded data bits representing the coded data block are received. First soft information values are determined corresponding to respective ones of the received first plurality of coded data...

Transport data reduction for das systems
03/20/14 - 20140079112 - An endpoint element of a distributed antenna system includes processing circuitry configured for processing a plurality of digital signals for conditioning the signals and compression circuitry configured for compressing at least one of the digital signals according to a compression scheme to yield at least one compressed digital signal and...

Disparity reduction for high speed serial links
03/06/14 - 20140064356 - System, computer program product, and computer-implemented method to improve a running disparity of an encoded bit stream in a distributed network switch, the distributed network switch comprising a plurality of switch modules including a first switch module, by receiving, at the first switch module, a raw data stream comprising a...

Disparity reduction for high speed serial links
03/06/14 - 20140064357 - System, computer program product, and computer-implemented method to improve a running disparity of an encoded bit stream in a distributed network switch, the distributed network switch comprising a plurality of switch modules including a first switch module, by receiving, at the first switch module, a raw data stream comprising a...

Systems and methods for video and audio data storage and distribution.
01/23/14 - 20140023135 - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when,...

Shift-invariant digital sampling rate conversion system
10/24/13 - 20130279562 - There is described a method of making a linear periodically time varying system shift-invariant, comprising the following steps implemented for each input signal the sampling rate of which has to be converted: —generating a set of polyphase components based on the input signal, —feeding the generated set of polyphase components...

Encoder and method for predictively encoding, decoder and method for decoding, system and method for predictively encoding and decoding and predictively encoded information signal
10/17/13 - 20130272369 - An encoder for predictively encoding a signal having a sequence of signal values has a predictor for performing an adaptive prediction in dependence on the signal, and in dependence on one or more weighting values, to obtain predicted signal values, wherein the predictor is configured to reset the weighting values...

Method of transmitting data samples with reduced bandwidth
09/19/13 - 20130243074 - Methods and apparatus are disclosed for compressing and decompressing data to reduce bandwidth requirements in transmissions of predistorted signals between a processing node and a remote transmitting node of a power amplifier with digital predistortion (PA-DPD) system. In the processing node, predistorted signals are decomposed into a high-dynamic range signal...

Apparatus for synchronization of audio data and visual data and method therefor
07/25/13 - 20130188682 - An apparatus for synchronizing audio data and visual data and a method therefor are provided. The apparatus includes a splitter, a synchronization unit coupled to the splitter, an audio control unit coupled to the splitter and the synchronization unit, and a visual data processing unit coupled to the splitter and...

Method and apparatus for transmitting and receiving signals based on dual compressive sensing in wireless communication system
06/13/13 - 20130148713 - A method for transmitting signals based on dual sensing in a wireless communication system is disclosed. One or more sensor nodes receive Gaussian codes corresponding respectively to the one or more sensor nodes, allocated from a fusion center. The one or more sensor nodes determine whether to operate at a...

Time-deinterleaver and method for input signal processing and computer program products using the same
05/02/13 - 20130107936 - A method for processing input data for use in a time-deinterleaver of a receiver is provided. Input data is first received, wherein the input data is data inputted to the time-deinterleaver and includes a plurality of symbols and each symbol includes a plurality of samples and each sample includes a...

Method and apparatus for deinterleaving in a digital communication system
05/02/13 - 20130107937 - A method and apparatus for deinterleaving in a communication system is disclosed. The method and apparatus deinterleave data units using a data deinterleaver; compressed deinterleave input symbol quality information (SQI) units using a compressed deinterleaver, wherein at least one of the input SQI units deinterleaved by the compressed deinterleaver corresponds...

Method for data transmission to an electronic control unit
03/21/13 - 20130070837 - A method for data transmission from a programming device to a control unit, the data being compressed by Huffman coding and transmitted with a Huffman coding tree for decoding from the programming device to the control unit, are decompressed and stored in the control unit, by performing, for a predetermined...

Device and method for processing digital images captured by a binary image sensor
02/28/13 - 20130051451 - A method for processing image data comprises determining a set of parameters based on a binary digital image) such that said set of parameters comprises information about the density of white and/or black pixels of a first group of pixels of said binary digital image), and information about the density...

Method and apparatus for transmitting and receiving control information in a broadcasting/communication system
09/27/12 - 20120243600 - A method and an apparatus for encoding, transmitting, and receiving signaling information in a broadcasting/communication system are provided. The method includes generating the signaling information which comprises a plurality of pieces; determining a number of coded blocks to which the signaling information is to be encoded, based on a number...

Method and apparatus for signal compression and decompression
08/16/12 - 20120207206 - In one embodiment, the method of compressing a digital signal includes reducing redundancies in the digital signal, scaling a block of samples output from the reducing step by a scaling factor, and quantizing the scaled samples to produce compressed samples. The digital signal being compressed may be a digital radio...

Data puncturing ensuring orthogonality within communication systems
07/12/12 - 20120177100 - Data puncturing ensuring orthogonality within communication systems. Puncturing is employed within communication systems to ensure orthogonality (or substantial orthogonality) of various transmissions between communication devices within communication systems. Any of a variety of types of signals can be employed herein including uncoded signals, turbo encoded signals, turbo trellis coded modulation...

Channel information compressing apparatus and method, channel information decompressing apparatus and method, receiver, and transmitter
07/05/12 - 20120170641 - A channel information compressing apparatus of the present invention includes a DCT part that performs discrete cosine transform on channel information (CSI) representing the state of a communication channel, and an information compressor that compresses high frequency components of information included in discrete cosine transform data which is produced by...

Method for encoding or decoding digital data, data disseminating device and data managing device
06/28/12 - 20120163445 - A method for encoding or decoding digital data, a data dissemination device and a data managing device are provided. The method for encoding digital data includes the following steps. A digital data is received. A sign data is encoded into the digital data through a linear combination operation to obtain...

Hybrid codec apparatus and method for data trasnferring
06/21/12 - 20120155531 - In a hybrid codec apparatus for data broadcasting, an encoder divides a source file into N sections, generates N principal encoded data after coding on a first finite field and k additional encoded data after coding on a second finite field, then transmits a group of coefficient encoded data and...

Coding method, decoding method, coding apparatus, and decoding apparatus
05/31/12 - 20120134408 - A coding method comprises: transforming an input signal; scanning and quantizing coefficient values composing the transformed output signal; and entropy coding the quantized coefficients, wherein the transforming includes: generating a first transformed output signal by performing a first transform on the input signal using a first transform coefficient; and generating...

Method for transmitting numeric values from a detection unit to a control unit
05/03/12 - 20120106620 - A method for transmission of numeric values from a detection unit to a control unit including the steps of: applying to the numeric value considered at least one first and second coding algorithm to obtain a first and second code (NUM-BIT) in binary formats; storing the first and second codes,...

Coding method, coding apparatus, coding program, and recording medium therefor
04/19/12 - 20120093213 - A lossless coding technique for near-logarithmic companded PCM that achieves high compression performance is provided. In coding, the coding method that produces the smaller code amount is selected between the prediction coding method, which performs linear prediction of samples in a frame and codes the amplitude of the prediction error,...

Method and apparatus for lossless encoding and decoding based on context
01/26/12 - 20120020406 - Provided are a method and apparatus of a lossless encoding and decoding based on a context. According to an embodiment, by aligning and coding symbols of a MSB, a coding efficiency may be enhanced. According to an embodiment, by estimating initial scaling information using a symbol located proximate to a...

Encoding method, decoding method, encoding device, decoding device, program, and recording medium
12/15/11 - 20110305272 - To improve the encoding compressibility of prediction residuals. An encoder performs prediction analysis of input time-series signals to generate prediction residuals expressed by integers, and sets an integer separation parameter that depends on the amplitude of the prediction residuals for each certain time segment. The encoder selects a side information...

Package output method and device for arithmetic coding
11/03/11 - 20110268174 - A method and a device for arithmetic code package outputting. The method comprises: acquiring the 7-bit output string of the upper bits according to the CodLow value, i.e., the starting position of the probability space to be updated, and using the 7-bit ID string to identify the output characters with...

Apparatus and method for encoding and decoding multichannel signal
10/20/11 - 20110255588 - Disclosed is an apparatus for encoding and decoding multi-channel signals. The apparatus for encoding the multi-channel signals may shift a phase of the multi-channel signals based on a characteristic of the multi-channel signals. An encoded bitstream with respect to the multi-channel signals may be generated using a downmix signal and...

Bandwidth sensitive data compression and decompression
09/29/11 - 20110235697 - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, a controller tracks and monitors the throughput (data storage and retrieval) of a data compression system and generates control signals to enable/disable different compression algorithms when,...

Compression dictionary synchronization method and device
09/15/11 - 20110222596 - A compression dictionary synchronization method and device are provided. The method includes: obtaining a synchronization information field of a dictionary entry in a compression dictionary corresponding to data to be sent; judging, according to the synchronization information field, whether a network device at a receiving side has the dictionary entry;...

Methods, apparatuses and system for encoding and decoding signal
08/11/11 - 20110194598 - Methods and apparatuses for encoding a signal and decoding a signal and a system for encoding and decoding are provided. The method for encoding a signal includes performing a classification decision process on high frequency signals of input signals, adaptively encoding the high frequency signals according to the result of...

Orthogonal multiple description coding
07/07/11 - 20110164672 - In one aspect, an orthogonal multiple description encoder comprises orthogonal multiple description generation circuitry configured to produce multiple descriptions of a given signal by processing the signal using respective ones of a plurality of orthogonal matrices. Each of the multiple descriptions is generated as a function of the signal and...

Asymmetric dictionary-based compression/decompression useful for broadcast or multicast unidirectional communication channels
06/30/11 - 20110158307 - An asymmetric approach for compressing digital data, or digitized analog data, uses dictionary-based compression for a transmitter and receiver communicating over a lossy unidirectional communication channel. The transmitter is responsible for generating active dictionaries, selecting appropriate dictionaries for compressing data, retiring old dictionaries, and sending new dictionaries to the receiver....

Quantization splitting multiple description encoder
06/09/11 - 20110134990 - An improved (N:K) multiple description binning encoder that employs binning yet permits recovery of the input signal when fewer than K of the descriptions are available. This is achieved by quantization splitting a chosen number of descriptions....

Scalable coding with partial eror protection
02/03/11 - 20110026581 - An encoder for encoding an audio signal, wherein the encoder comprises: a first encoder configured to receive an first signal and generate a second signal dependent on the first signal; a second encoder configured to generate a third signal dependent on the second signal and the first signal; a signal...

Coding
01/27/11 - 20110019729 - Coding is provided in which a multi-media object is coded to obtain a bit-stream, and quality information is added to the bit-stream, which quality information indicates a quality of the object in relation to a given position in (or a given part of) the bit-stream. By adding quality information to...

Signal block sequence processing method and signal block sequence processing apparatus
01/20/11 - 20110013690 - The present invention provides a signal block sequence processing method. According to the method, signal block headers (Bch, Bdh) are deleted from each sequence of signal blocks (B) each composed of the signal block header indicating whether a signal block payload is a control block payload (Bc′) containing a control...

Compressed sensing characterization system and method
01/13/11 - 20110007795 - A system for characterizing a compressed sensing apparatus is described which broadly includes a random vector generator for generating an input vector, a waveform generator in communication with the random vector generator for converting the input vector into an analog signal, a compressed sensing apparatus in communication with the digital-to-analog...

Recorded medium having program for coding and decoding using bit-precision, and apparatus thereof
12/16/10 - 20100316113 - With the present invention, video data can be entropy-coded by selectively determining the number of bits and there can be provided the decoding method with a little complexity which has not only the identical compression rate to the conventional entropy coding method but also no necessity of additional computation when...

Bandwidth sensitive data compression and decompression
12/16/10 - 20100316114 - Data compression and decompression methods for compressing and decompressing data based on an actual or expected throughput (bandwidth) of a system. In one embodiment, multiple access profiles are utilized to assist in compressing data according to various compression rates and compression ratios....

Encoding device, decoding device, and method thereof
11/11/10 - 20100284455 - Provided is an encoding device which divides an input signal into a low-range component and a high-range component and encodes the components in separate encoding units. The encoding device can improve quality of a decoded signal. The encoding device (101) includes: a band division process unit (201) which subjects an...

System and method for huffman shaping in a data communication system
09/30/10 - 20100246661 - In a communication system, Huffman coding techniques are used to obtain shaping gains for an improvement in data transmission rates. More particularly, a novel method of Huffman shaping is described that achieves a shaping gain of greater than 1 dB. The shaping gain results in a higher data rate transmission...

Method and apparatus for multiple description coding
08/26/10 - 20100215092 - The present invention relates to a method and apparatus to be used in designing an index assignment matrix for use in multiple description coding of an information signal. The bandwidth of the index assignment matrix is selected in dependence of transmission condition information relating to a transmission condition of a...

Post-processing for reducing quantization noise of an encoder during decoding
07/22/10 - 20100183067 - The invention relates to the processing of a signal that is compression encoded (COD) according to a predetermined encoding type applying a quantification operation (Q) and then decoded (DEC) so that the quantification noise is present in the decoded signal (S*). The signal processing of the invention comprises applying a...

Encoder, decoder, encoding method and decoding method, and recording medium
07/01/10 - 20100166052 - An encoder includes a separation unit separating image data into a plurality of data blocks, a variable length encoding unit variable-length-encoding the data blocks separated by the separation unit so as to generate variable length code sequences, a code block generating unit generating code blocks variable-length-decoded in parallel from a...

Dynamically scaled messaging content
06/24/10 - 20100158097 - The claimed subject matter provides for systems, devices, and methods facilitating dynamic scaling of messaging content. Messaging content can include visual content other than the actual textual content of a message body for a messaging environment. In an aspect dynamic scaling of messaging content can allow message content such as...

Quantum based information transmission system and method
06/17/10 - 20100150222 - A method and system of data transmission; the method comprising: converting data into qubits; transmitting a first qubit; measuring the first qubit at receiver location; determining whether or not to transmit portions of data from a sequential successive qubit based upon the value of the first qubit measured at the...

Receiver and receiving method for scalable bandwith
04/29/10 - 20100104001 - Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output...

Method and apparatus for cached adaptive transforms for compressing data streams, computing similarity, and recognizing patterns
04/22/10 - 20100098151 - In one embodiment of the invention there is no beginning baseline transform shared between the encoder and the decoder....

Systems and methods for telescopic data compression in sensor networks
04/15/10 - 20100091834 - Systems and methods for telescopic data compression in sensor networks are disclosed herein. An exemplary method of the disclosed subject matter for telescopically compressing data received from a plurality of sensors in a network adapted to detect a field includes broadcasting a first set of sampling positions to sensors, forming...

Band extending apparatus and method
01/21/10 - 20100014576 - A band extending apparatus (1) is provided with: first generating device (111, 112) for generating a baseband signal (XB(n)) by up-sampling an input signal (X(n)) and then transmitting it through a low-pass filter; a second generating device (21) for generating a high-frequency signal (XH(n)), by extracting a signal component on...

Method and apparatus for fast nearest neighbor search for vector quantizers
01/21/10 - 20100014577 - A method comprises identifying a component k of a codevector from a codebook C having one or more codevectors, the component k introducing highest variance for an input vector; allowing ordering of codevectors in the codebook C; and searching for a best match vector for the input vector using ordered...

Method and apparatus for multi-part interactive compression
12/24/09 - 20090316774 - In order to increase the compression of data being transmitted between two devices in communication, the data may be broken up into individual components and individually compressed using different compression state information. The method of multi-part interactive compression comprises the steps of retrieving a request for data from a communicating...

System and method for effectively transferring electronic information
12/10/09 - 20090304067 - A system and method for effectively transferring electronic information includes a transmitter with an encoder that performs a parity encoding procedure. The encoder creates parity blocks for embedding in transmission packets. The parity blocks may be based upon data segments from one or more of the transmission packets. The system...

Methods and apparatus for reducing modulation signal bandwidth in polar modulation transmitters
11/26/09 - 20090290631 - Methods and apparatus for reducing the bandwidth of modulation signals in a phase path of a polar modulation transmitter. An exemplary method includes generating a phase difference modulation signal for a phase path of a polar modulation transmitter, and filtering the phase difference modulation signal using a linear-phase filter. Filtering...

Compression of signals in base transceiver systems
11/26/09 - 20090290632 - A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses signal samples resulting from analog to digital conversion of...

Method, apparatus, and program for encoding digital signal, and method, apparatus, and program for decoding digital signal
11/12/09 - 20090279598 - A down sampler 13 down samples a digital signal in the sampling frequency thereof from 96 kHz to 48 kHz on a frame-by-frame basis. The converted signal is compression encoded and output as a main code Im. An up sampler 16 converts a partial signal corresponding to the main code...

Method for transmitting preamble in scalable bandwidth system
09/10/09 - 20090225824 - A method for transmitting a preamble in a scalable bandwidth system is disclosed. The method includes transmitting a primary synchronization channel to which symbols are allocated at intervals of two or more subcarriers, through a specific bandwidth out of an entire system bandwidth at a start time point of a...

Method and apparatus for estimating high-band energy in a bandwidth extension system
08/13/09 - 20090201983 - A method (100) includes receiving (101) an input digital audio signal comprising a narrow-band signal. The input digital audio signal is processed (102) to generate a processed digital audio signal. An estimate of the high-band energy level corresponding to the input digital audio signal is determined (103). Modification of the...

Bandwidth asymmetric communication system
08/13/09 - 20090201984 - The present invention relates to a bandwidth asymmetric communication system comprising at least one terminal having an uplink transmission unit (1) for transmitting radio frequency OFDM signals at a radio frequency and an access point having an uplink receiving unit (4) for receiving said radio frequency OFDM signals, said OFDM...