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Class Information
Number: 704/500
Name: Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression > Audio signal bandwidth compression or expansion
Description: Subject matter where there is either an expansion or reduction of the bandwidth required for transmission of a sound signal.

Sub-classes under this class:

Class Number Class Name Patents
704/502 Delay line 165
704/501 With content reduction encoding 588

Patents under this class:

Patent Number Title Of Patent Date Issued
8392202 Low-complexity spectral analysis/synthesis using selectable time resolution Mar. 5, 2013
8392201 Method and system for distributed audio transcoding in peer-to-peer systems Mar. 5, 2013
8392200 Low complexity spectral band replication (SBR) filterbanks Mar. 5, 2013
8392199 Clipping detection device and method Mar. 5, 2013
8392198 Split-band speech compression based on loudness estimation Mar. 5, 2013
8392177 Method and apparatus for frequency encoding, and method and apparatus for frequency decoding Mar. 5, 2013
8391513 Stream synthesizing device, decoding unit and method Mar. 5, 2013
8391373 Concealment of transmission error in a digital audio signal in a hierarchical decoding structure Mar. 5, 2013
8391212 System and method for frequency domain audio post-processing based on perceptual masking Mar. 5, 2013
8386271 Lossless and near lossless scalable audio codec Feb. 26, 2013
8386269 Multi-channel audio encoding and decoding Feb. 26, 2013
8386268 Apparatus and method for generating a synthesis audio signal using a patching control signal Feb. 26, 2013
8386267 Stereo signal encoding device, stereo signal decoding device and methods for them Feb. 26, 2013
8386266 Full-band scalable audio codec Feb. 26, 2013
8385934 Apparatus and method for adaptive audio quality control using bluetooth Feb. 26, 2013
8380526 Method, device and system for enhancement layer signal encoding and decoding Feb. 19, 2013
8380525 Continued telecommunication with weak links Feb. 19, 2013
8380524 Rate-distortion optimization for advanced audio coding Feb. 19, 2013
8380523 Method and an apparatus for processing an audio signal Feb. 19, 2013
8380522 Layer 2 compression/decompression for mixed synchronous/asynchronous transmission of data frames within a communication network Feb. 19, 2013
8380496 Method and system for pitch contour quantization in audio coding Feb. 19, 2013
8379868 Spatial audio coding based on universal spatial cues Feb. 19, 2013
8374884 Decoding apparatus and decoding method Feb. 12, 2013
8374883 Encoder and decoder using inter channel prediction based on optimally determined signals Feb. 12, 2013
8374882 Parametric stereophonic audio decoding for coefficient correction by distortion detection Feb. 12, 2013
8374857 Estimating rate controlling parameters in perceptual audio encoders Feb. 12, 2013
8374854 Spatio-temporal speech enhancement technique based on generalized eigenvalue decomposition Feb. 12, 2013
8374853 Hierarchical encoding/decoding device Feb. 12, 2013
8374852 Apparatus and method of code conversion and recording medium that records program for computer to execute the method Feb. 12, 2013
8374365 Spatial audio analysis and synthesis for binaural reproduction and format conversion Feb. 12, 2013
8374234 Digital scaling Feb. 12, 2013
8370164 Apparatus and method for coding and decoding multi-object audio signal with various channel including information bitstream conversion Feb. 5, 2013
8370133 Method and device for noise filling Feb. 5, 2013
8364496 Signal recording and reproducing apparatus and method Jan. 29, 2013
8364495 Voice encoding device, voice decoding device, and methods therefor Jan. 29, 2013
8364494 Systems, methods, and apparatus for split-band filtering and encoding of a wideband signal Jan. 29, 2013
8364474 Signal encoding device and signal encoding method, signal decoding device and signal decoding method, program, and recording medium Jan. 29, 2013
8364471 Apparatus and method for processing a time domain audio signal with a noise filling flag Jan. 29, 2013
8359205 Methods and apparatus to perform audio watermarking and watermark detection and extraction Jan. 22, 2013
8359196 Stereo sound decoding apparatus, stereo sound encoding apparatus and lost-frame compensating method Jan. 22, 2013
8355509 Parametric joint-coding of audio sources Jan. 15, 2013
8352280 Scalable multi-channel audio coding Jan. 8, 2013
8352279 Efficient temporal envelope coding approach by prediction between low band signal and high band signal Jan. 8, 2013
8352054 Method and apparatus for processing digital audio signal Jan. 8, 2013
8351612 Apparatus for generating and playing object based audio contents Jan. 8, 2013
8346567 Efficient and secure forensic marking in compressed domain Jan. 1, 2013
8346566 Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks Jan. 1, 2013
8346565 Apparatus and method for generating an ambient signal from an audio signal, apparatus and method for deriving a multi-channel audio signal from an audio signal and computer program Jan. 1, 2013
8346564 Multi-channel audio coding Jan. 1, 2013
8345899 Phase-amplitude matrixed surround decoder Jan. 1, 2013

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