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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:
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Patent Number Title Of Patent Date Issued
8032385 Method for correcting metadata affecting the playback loudness of audio information Oct. 4, 2011
8032371 Determining scale factor values in encoding audio data with AAC Oct. 4, 2011
8032368 Apparatus and method of encoding and decoding audio signals using hierarchical block swithcing and linear prediction coding Oct. 4, 2011
8032363 Adaptive postfiltering methods and systems for decoding speech Oct. 4, 2011
8032362 Audio signal encoding/decoding method and apparatus Oct. 4, 2011
8027480 Multichannel spectral mapping audio apparatus and method Sep. 27, 2011
8027479 Binaural multi-channel decoder in the context of non-energy conserving upmix rules Sep. 27, 2011
8024197 Sampling rate conversion apparatus and method thereof Sep. 20, 2011
RE42701 Audio transmission, recording and reproducing system Sep. 13, 2011
8019615 Method and system for decoding GSM speech data using redundancy Sep. 13, 2011
8019612 Methods for improving high frequency reconstruction Sep. 13, 2011
8019611 Method of processing a signal and apparatus for processing a signal Sep. 13, 2011
8019601 Audio coding device with two-stage quantization mechanism Sep. 13, 2011
8019598 Phase locking method for frequency domain time scale modification based on a bark-scale spectral partition Sep. 13, 2011
8015368 Processor extensions for accelerating spectral band replication Sep. 6, 2011
8015017 Band based audio coding and decoding apparatuses, methods, and recording media for scalability Sep. 6, 2011
8015000 Classification-based frame loss concealment for audio signals Sep. 6, 2011
8014535 Multichannel spectral vector mapping audio apparatus and method Sep. 6, 2011
8010374 Audio coding apparatus and audio decoding apparatus Aug. 30, 2011
8010373 Signal coding and decoding Aug. 30, 2011
8010372 Apparatus and method of encoding and decoding audio signal Aug. 30, 2011
8010371 Method and system for reduction of quantization-induced block-discontinuities and general purpose audio codec Aug. 30, 2011
8010370 Bitrate control for perceptual coding Aug. 30, 2011
8010353 Audio switching device and audio switching method that vary a degree of change in mixing ratio of mixing narrow-band speech signal and wide-band speech signal Aug. 30, 2011
8010348 Adaptive encoding and decoding with forward linear prediction Aug. 30, 2011
8010346 Method and apparatus for transmitting wideband speech signals Aug. 30, 2011
8005670 Audio glitch reduction Aug. 23, 2011
RE42627 Encoding and decoding of information in audio signals Aug. 16, 2011
8000976 Speech band extension device Aug. 16, 2011
8000975 User adjustment of signal parameters of coded transient, sinusoidal and noise components of parametrically-coded audio before decoding Aug. 16, 2011
7996234 Method and apparatus for adaptive variable bit rate audio encoding Aug. 9, 2011
7996233 Acoustic coding of an enhancement frame having a shorter time length than a base frame Aug. 9, 2011
7996216 Apparatus and method of encoding and decoding audio signal Aug. 9, 2011
7994945 Encoding/decoding of digital signals, especially in vector quantization with permutation codes Aug. 9, 2011
7994944 Encoding/decoding of digital signals, especially in vector quantization with permutation codes Aug. 9, 2011
7991621 Method and an apparatus for processing a signal Aug. 2, 2011
7991611 Speech encoding apparatus and speech encoding method that encode speech signals in a scalable manner, and speech decoding apparatus and speech decoding method that decode scalable encoded sign Aug. 2, 2011
7991012 Apparatus and method of encoding and decoding audio signal Aug. 2, 2011
7987097 Method for decoding an audio signal Jul. 26, 2011
7987096 Methods and apparatuses for encoding and decoding object-based audio signals Jul. 26, 2011
7987095 Method and system for dual mode subband acoustic echo canceller with integrated noise suppression Jul. 26, 2011
7986634 Apparatus and method for measuring quality of sound encoded with a variable band multi-codec Jul. 26, 2011
7983922 Apparatus and method for generating multi-channel synthesizer control signal and apparatus and method for multi-channel synthesizing Jul. 19, 2011
7983304 Communication system provided with transmitter for transmitting audio contents using packet frame of audio data Jul. 19, 2011
7979282 Methods and apparatuses for encoding and decoding object-based audio signals Jul. 12, 2011
7979271 Methods and devices for switching between sound signal coding modes at a coder and for producing target signals at a decoder Jul. 12, 2011
7979269 Universal container for audio data Jul. 12, 2011
7978762 Transcoder device for transcoding compressed and encoded bitstream of motion picture in syntax level and motion picture communication system Jul. 12, 2011
7974848 Method and apparatus for encoding audio data Jul. 5, 2011
7974847 Advanced methods for interpolation and parameter signalling Jul. 5, 2011

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