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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
7974839 Method, medium, and apparatus encoding scalable wideband audio signal Jul. 5, 2011
7974417 Multi-channel bass management Jul. 5, 2011
7973679 Encoding/decoding of digital signals, especially in vector quantization with permutation codes Jul. 5, 2011
7970618 Content distribution server for distributing content frame for reproducing music and terminal Jun. 28, 2011
7970607 Method and system for low bit rate voice encoding and decoding applicable for any reduced bandwidth requirements including wireless Jun. 28, 2011
7970604 System and method for switching between a first filter and a second filter for a received audio signal Jun. 28, 2011
7970602 Data reproduction device Jun. 28, 2011
7970072 Method and apparatus for processing a signal Jun. 28, 2011
7970048 Method of systematic construction of space-time constellations, system and method of transmitting space-time constellations Jun. 28, 2011
7966191 Method and apparatus for generating a number of output audio channels Jun. 21, 2011
7966190 Apparatus and method for processing an audio signal using linear prediction Jun. 21, 2011
7965849 Multichannel spectral mapping audio apparatus and method Jun. 21, 2011
7965848 Reduced number of channels decoding Jun. 21, 2011
7962332 Apparatus and method of encoding and decoding audio signal Jun. 14, 2011
7957978 Method and terminal for encoding or decoding an analog signal Jun. 7, 2011
7957977 Media program identification method and apparatus based on audio watermarking Jun. 7, 2011
7957963 Voice transcoder Jun. 7, 2011
7953605 Method and apparatus for audio encoding and decoding using wideband psychoacoustic modeling and bandwidth extension May. 31, 2011
7953604 Shape and scale parameters for extended-band frequency coding May. 31, 2011
7953595 Dual-transform coding of audio signals May. 31, 2011
7949042 Image searching device and method, program and program recording medium May. 24, 2011
7949014 Apparatus and method of encoding and decoding audio signal May. 24, 2011
7945449 Temporal envelope shaping for spatial audio coding using frequency domain wiener filtering May. 17, 2011
7945448 Perception-aware low-power audio decoder for portable devices May. 17, 2011
7945447 Sound coding device and sound coding method May. 17, 2011
7941319 Audio decoding apparatus and decoding method and program May. 10, 2011
7941311 System and method for linguistic collation May. 10, 2011
7941037 Audio/video timescale compression system and method May. 10, 2011
7937272 Scalable encoding/decoding of audio signals May. 3, 2011
7937271 Audio decoding using variable-length codebook application ranges May. 3, 2011
7937266 Audio reproduction circuit May. 3, 2011
7933778 Serial transmission system, transmission device, and serial transmission method Apr. 26, 2011
7933769 Methods and devices for low-frequency emphasis during audio compression based on ACELP/TCX Apr. 26, 2011
7933417 Encoding device and decoding device Apr. 26, 2011
7930185 Apparatus and method for controlling audio-frame division Apr. 19, 2011
7930184 Multi-channel audio coding/decoding of random access points and transients Apr. 19, 2011
7930177 Apparatus and method of encoding and decoding audio signals using hierarchical block switching and linear prediction coding Apr. 19, 2011
7930171 Multi-channel audio encoding/decoding with parametric compression/decompression and weight factors Apr. 19, 2011
7930170 Computationally efficient audio coder Apr. 19, 2011
7924929 Method of automatically testing audio-video synchronization Apr. 12, 2011
7921009 Method and device for updating status of synthesis filters Apr. 5, 2011
7917370 Configurable common filterbank processor applicable for various audio standards and processing method thereof Mar. 29, 2011
7917369 Quality improvement techniques in an audio encoder Mar. 29, 2011
7917358 Transient detection by power weighted average Mar. 29, 2011
7916873 Stereo compatible multi-channel audio coding Mar. 29, 2011
7912730 Universal container for audio data Mar. 22, 2011
7912729 High-frequency bandwidth extension in the time domain Mar. 22, 2011
7912728 Method and system for handling the processing of bluetooth data during multi-path multi-rate audio processing Mar. 22, 2011
7912226 Automatic measurement of audio presence and level by direct processing of an MPEG data stream Mar. 22, 2011
7908148 Method for decoding an audio signal Mar. 15, 2011

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