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Electrical Audio Signal Processing Systems And Devices > Noise Or Distortion Suppression Noise Or Distortion SuppressionNoise Or Distortion Suppression patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/08/07 - 20070258601 - Audio signal processing apparatus The audio signal processing apparatus comprises an audio processing unit 2 and a control unit 3. The audio processing unit 2 is provided for processing an audio signal Sau outputted from a receiving unit Rx which receives a signal transmitted through a digital transmission route. The control unit 3 is ... 09/27/07 - 20070223733 - Ambient noise sound level compensation An ambient noise compensation system determines an ambient noise level of a listening area. The ambient noise level may be calculated from the differences between a desired audio signal in the listening area, a measured background noise level in the listening area, and measured acoustic characteristics of the listening area. ... 09/13/07 - 20070211909 - Echo cancellation method in wireless headset communication system An echo cancellation method in a wireless headset communication system includes the steps: (1) providing at least one delayer and at least one amplifier for respectively performing a specific phase modulation and a specific amplitude adjustment on at least one branch signal of a receiving signal received from a far-end ... 08/30/07 - 20070201704 - Analysis method for sound or vibration and analyzing apparatus for sound or vibration A detection signal of sound or vibration detected at an evaluation point is filtered so that an evaluation waveform signal is extracted. Then, a mother wavelet is derived using this. On the other hand, each of detection signals of sound or vibration detected at a plurality of candidate points is ... 08/16/07 - 20070189550 - Panel acoustic contributions examination A system for analyzing noise sources correlates the sound pressure level value at any field point to the acoustic energy directly flowing out of any individual panel of a vibrating structure. This acoustic energy flow or acoustic intensity depicts how sound radiates and in which direction a sound wave propagates ... 07/19/07 - 20070165881 - System and method for acquiring acoustic signals using doppler techniques A method and system enhances an acoustic signal acquired by a microphone from an acoustic source while concurrently acquiring a Doppler signal from moving parts of the acoustic source. The acoustic signal and the Doppler signal are then analyzed according to a model to generate an enhanced acoustic signal. ... 07/12/07 - 20070160229 - Noise filtering edge detectors This invention relates to a noise filtering edge detector (NFED) for recovering data carrying edges from a noisy received signal by dense over-sampling of the received signal and by detecting edge phases and edge amplitude limits wherein recovered signal amplitudes at sampling instance defining said edge phase are determined by ... 07/05/07 - 20070154033 - Audio source separation based on flexible pre-trained probabilistic source models Improved audio source separation is provided by providing an audio dictionary for each source to be separated. Thus the invention can be regarded as providing “partially blind” source separation as opposed to the more commonly considered “blind” source separation problem, where no prior information about the sources is given. The ... 07/05/07 - 20070154032 - Particular program detection device, method, and program A particular program detection device is provided which can detect a particular program segment even in a program signal contaminated with noise by adaptively modifying a detection sensitivity for a scene change point. A noise level detecting section (12) detects a noise level of a program signal outputted from a ... 06/28/07 - 20070147635 - System and method for separation of a user's voice from ambient sound A system for separation of a user's voice from ambient sound, comprising a device to be worn at the user's ear or at least partly in the user's ear canal comprising a first microphone oriented outwardly towards the environment and a second microphone oriented inwardly towards the user's ear canal, ... 06/14/07 - 20070133820 - Channel capacity improvement in wireless mobile communications by voice snr advancements A voice microphone collects sound waves from the user as well as unwanted background noise. A second background microphone collects ambient sound. The inputs from the two microphones retain their analog format. The signal from the background microphone is subtracted from the input of the voice microphone. The resulting signal ... 06/14/07 - 20070133819 - Method for establishing the separation signals relating to sources based on a signal from the mix of those signals A method for establishing the separation signals relating to audible sources based on a signal from the mix of those signals, the signals being in the form of successive units, the method including a step for establishing an estimate signal for each of the sources. The method further includes, for ... 06/14/07 - 20070133818 - System and method for reducing radio frequency interference between a wireless communication device and a speaker A device and method are provided that reduce interference between a wireless communication device and a speaker. Generally speaking, a microphone input is monitored for detecting noise created by the interference. If noise is detected, a power transmission level of the wireless device is reduced from a standard power transmission ... 03/15/07 - 20070058822 - Noise reducing apparatus, method and program and sound pickup apparatus for electronic equipment A noise reducing apparatus is disclosed, which includes: input means for inputting multiple audio signals from multiple audio channels; multiple band extracting means for extracting a predetermined band from the multiple audio signals; calculating means for averaging signals from the multiple band extracting means; multiple first level detecting means for ... 03/08/07 - 20070053526 - Communication channel estimation A channel estimator is configured to determine channel estimate parameters indicative of characteristics of a wireless communication channel based on a received signal comprising a known transmitted signal and a noise signal. The channel estimator is configured to apply, to the received signal, a frequency domain representation inverse of a ... 03/08/07 - 20070053525 - System and method for reduction of information handling system power state transition of audible noise Audible noise related to power state transitions of an information handling system processing component, such as the central processing unit, is reduced by randomizing the time between power state transitions. Random power state transitions are managed by an operating system module that tracks the transitions and selects random times for ... 02/08/07 - 20070030982 - Interference suppression techniques System (10) is disclosed including an acoustic sensor array (20) coupled to processor (42). System (10) processes inputs from array (20) to extract a desired acoustic signal through the suppression of interfering signals. The extraction/suppression is performed by modifying the array (20) inputs in the frequency domain with weights selected ... 02/01/07 - 20070025563 - Snapshot of noise and acoustic propagation A system extracts the sound spectrum and sound pressure level (SPL) values of a target source in a non-ideal environment. This system can be critical for in-line or end-of-line quality control (QC) testing of sound-producing products in a manufacturing environment in which background noise level is high. The underlying principle ... 01/25/07 - 20070019825 - In-vehicle audio processing apparatus On the basis of status information on a vehicle collected by a status information input interface from a navigation device, an ECU, and sensors, an S/N ratio estimating unit estimates, as an S/N ratio, the level of the ratio between the power of a component corresponding to audio-device output sound ... 12/14/06 - 20060280317 - Cascading multi-band frequency notch filter An audio filter system including an audio notch filter having selected resistance and capacitance values, the system including up to ten parallel connected notch filters for a filter set, each notch filter selected to notch the same frequency or band of frequencies. A number of filter sets may further be ... 11/16/06 - 20060256977 - Automatic audio distortion control method and apparatus Disclosed is an automatic audio distortion control method and apparatus, wherein the automatic audio distortion control apparatus comprises an amplifier (6) and a feedback loop which has its both ends coupled to an input and an output of the amplifier (6), wherein said feedback loop has clipping distortion of signals ... 11/09/06 - 20060251269 - Anatomy data-collection with low-frequency noise-cancellation capabililty A system and a method for clearly obtaining heart sounds in the presence of noise, including, from a systemic point of view (a) a pair of close-proximity sound transducers applied to a pair of sites on the human body for gathering heart and external-source sounds, and for producing from such ... 11/09/06 - 20060251268 - System for suppressing passing tire hiss A voice enhancement logic improves the perceptual quality of a processed voice. The voice enhancement system includes a passing tire hiss noise detector and a passing tire hiss noise attenuator. The passing tire hiss noise detector detects a passing tire hiss noise by modeling the passing tire hiss. The passing ... 10/19/06 - 20060233390 - Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames A method and apparatus for de-noising weak bio-signals having a relatively low signal to noise ratio utilizes an iterative process of wavelet de-noising a data set comprised of a new set of frames of wavelet coefficients partially generated through a cyclic shift algorithm. The method preferably operates on a data ... 10/05/06 - 20060222188 - Sound apparatus with howling prevention function An acoustic system that eliminates the howling that occurs when the sound outputted by the speaker feeds back to the input device. The acoustic system comprises a digital signal processor (DSP) that divides the input audio signal into different frequency bands, and reduces the audio levels for the frequency bands ... 09/14/06 - 20060204020 - System for the digital processing of an acoustic or electrical signal, and telephone set provided with such a processing system The system for digitally processing an acoustic signal is arranged in a telephone set provided with a loudspeaker and a microphone, between the loudspeaker and the microphone. The system has an automatic gain control circuit associated with an echo cancellation device. It also comprises calculation means which are configured to ... 05/18/06 - 20060104460 - Adaptive time-based noise suppression Systems, an apparatus, and methods are provided for mitigating noise associated with an audio signal. A system (100) for mitigating noise associated with an audio signal includes an estimator module (108). The estimator module determines an estimated level of noise associated with the audio signal. The system also includes an ... 04/13/06 - 20060078133 - Integrated circuit systems and methods using block gain expansion and compression to improve the noise of analog storage in non-volatile memory cells Integrated circuit systems and methods using block gain expansion and compression to improve the noise of analog storage in non-volatile memory cells, particularly for small signals when noise would be most perceivable. In an exemplary embodiment, the analog samples of an audio signal are grouped and the largest sample in ... 04/06/06 - 20060072768 - Complementary-pair equalizer A method and apparatus are described which reduce the presence of an unwanted signal. According to one embodiment, a first signal is provided from a desired location that includes an unwanted signal while a second signal is provided from an alternate location (e.g., one where the unwanted signal is less ... 02/16/06 - 20060034468 - Method and device for noise suppression in a data processing arrangement A method and device for noise suppression in a data processing device may have input data entered into a storage device and saved as storage data, the storage data may be processed by a data processor and may be output as output data from the storage device. The input data ... 01/19/06 - 20060013412 - Method and system for reduction of noise in microphone signals A method for processing noisy electric signals, particularly microphone signals, to produce a processed noise reduced signal, is disclosed. Noise reduction is effected by subtracting from a main (front) digital signal a filtered rear signal obtained through an application of continuously adaptable filter coefficients to a rear digital signal. The ... 10/27/05 - 20050238183 - Automatic wind noise reduction circuit and automatic wind noise reduction method An object is to provide an automatic wind noise reducing circuit and an automatic wind noise reducing method, which are capable of coping with a multichanneling trend of audio signals, and improving performance as well as the degree of freedom in system design. Arithmetic units (26, 27, 28) obtain added ... 09/29/05 - 20050213777 - Systems and methods for separating multiple sources using directional filtering Systems and methods for performing source separation are provided. Source separation is performed using a composite signal and a signal dictionary. The composite signal is a mixture of sources received by a sensor. The signal dictionary is a database of filtered basis functions that are formed by the application of ... 08/11/05 - 20050175191 - Speech transmitter A voice transmission device has a tandem pass through function in an STM, ATM, IP network, and a noise canceller (21) is provided at a latter stage of an echo canceller (12) in a coding part, and in a case where a multistage connection state does not occur, noise removal ... 07/14/05 - 20050152563 - Noise suppression apparatus and method A noise estimation unit estimates a noise signal in an input signal. A section decision unit distinguishes a target signal section from a noise signal section in the input signal. A noise suppression unit suppresses the noise signal based on a first suppression coefficient from the input signal. A noise ... 06/02/05 - 20050117755 - Underwater sounding apparatus While keeping a propeller located in a negative direction of a y-axis turning, transmission of acoustic waves from vibrating elements of a transducer unit is interrupted. Reference signals “A” and “B” which are receiving beam signals having principal acoustic axes oriented in a propeller direction are generated from received signals ... ### FreshPatents.com Support |