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Class Information
Number: 381/94.7
Name: Electrical audio signal processing systems and devices > Noise or distortion suppression > Using signal channel and noise channel
Description: Subject matter having separate inputs, each respectively containing primarily the desired and undesired signals, and which derives at least one "clean" output having the desired signal by utilizing both inputs, such as by subtracting one input from the other.

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8712075 Spatially pre-processed target-to-jammer ratio weighted filter and method thereof Apr. 29, 2014
8712073 Method and apparatus for blind signal extraction Apr. 29, 2014
8693704 Method and apparatus for canceling noise from mixed sound Apr. 8, 2014
8682018 Microphone array with rear venting Mar. 25, 2014
8676571 Audio signal processing system and audio signal processing method Mar. 18, 2014
8644521 Adaptive noise control system with secondary path estimation Feb. 4, 2014
8606571 Spatial selectivity noise reduction tradeoff for multi-microphone systems Dec. 10, 2013
8588430 Controlling an adaptation of a behavior of an audio device to a current acoustic environmental condition Nov. 19, 2013
8577057 Digital dual microphone module with intelligent cross fading Nov. 5, 2013
8565446 Estimating direction of arrival from plural microphones Oct. 22, 2013
8526632 Microphone array for a camera speakerphone Sep. 3, 2013
8515085 Signal processing apparatus Aug. 20, 2013
8503691 Virtual microphone arrays using dual omnidirectional microphone array (DOMA) Aug. 6, 2013
8503692 Forming virtual microphone arrays using dual omnidirectional microphone array (DOMA) Aug. 6, 2013
8494177 Virtual microphone array systems using dual omindirectional microphone array (DOMA) Jul. 23, 2013
8488806 Signal processing apparatus Jul. 16, 2013
8483854 Systems, methods, and apparatus for context processing using multiple microphones Jul. 9, 2013
8467545 Noise reduction systems and methods for voice applications Jun. 18, 2013
8467543 Microphone and voice activity detection (VAD) configurations for use with communication systems Jun. 18, 2013
8447046 Circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system May. 21, 2013
8447047 Information processing apparatus and information processing method May. 21, 2013
8442238 Device in a headset May. 14, 2013
8433077 Noise removal device and noise removal method Apr. 30, 2013
8416958 Signal processing apparatus Apr. 9, 2013
8411876 Preserving noise during editing of a signal Apr. 2, 2013
8391509 Audio-separating apparatus and operation method thereof Mar. 5, 2013
8386247 System for processing an audio signal to enhance speech intelligibility Feb. 26, 2013
8385572 Method for reducing noise using trainable models Feb. 26, 2013
8379872 Talk-through listening device channel switching Feb. 19, 2013
8379879 Active noise reduction system Feb. 19, 2013
8363849 Automated interferometric noise measurement Jan. 29, 2013
8363850 Audio signal processing method and apparatus for the same Jan. 29, 2013
8364483 Method for separating source signals and apparatus thereof Jan. 29, 2013
8358796 Method and acoustic signal processing system for binaural noise reduction Jan. 22, 2013
8351618 Dereverberation and noise reduction method for microphone array and apparatus using the same Jan. 8, 2013
8351632 Noise mitigating microphone system and method Jan. 8, 2013
8345884 Signal separation reproduction device and signal separation reproduction method Jan. 1, 2013
8346554 Speech recognition using channel verification Jan. 1, 2013
8340319 Playback device, playback method and playback system Dec. 25, 2012
8340318 Methods and systems for measuring performance of a noise cancellation system Dec. 25, 2012
8340309 Noise suppressing multi-microphone headset Dec. 25, 2012
8311236 Noise extraction device using microphone Nov. 13, 2012
8306241 Method and apparatus for automatic volume control in an audio player of a mobile communication terminal Nov. 6, 2012
8280072 Microphone array with rear venting Oct. 2, 2012
8280073 Correcting engine noise cancellation microphone disturbances Oct. 2, 2012
8270634 Multiple microphone system Sep. 18, 2012
8265297 Sound reproducing device and sound reproduction method for echo cancelling and noise reduction Sep. 11, 2012
8243968 Flat-panel television and audio equipment Aug. 14, 2012
8229129 Method, medium, and apparatus for extracting target sound from mixed sound Jul. 24, 2012
8223990 Audio noise attenuation Jul. 17, 2012

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