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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
8345884 Signal separation reproduction device and signal separation reproduction method Jan. 1, 2013
8345739 Method, medium, and apparatus controlling bit rate in image data encoding Jan. 1, 2013
8340976 Method and apparatus for generating an enhancement layer within a multiple-channel audio coding system Dec. 25, 2012
8340959 Method and apparatus for transmitting wideband speech signals Dec. 25, 2012
8340302 Parametric representation of spatial audio Dec. 25, 2012
8340096 Method and apparatus for transmitting and receiving of the object-based audio contents Dec. 25, 2012
8335255 Motion estimation method, medium, and system with fast motion estimation Dec. 18, 2012
8332229 Low complexity MPEG encoding for surround sound recordings Dec. 11, 2012
8332228 Systems, methods, and apparatus for anti-sparseness filtering Dec. 11, 2012
8332213 Multi-reference LPC filter quantization and inverse quantization device and method Dec. 11, 2012
8331572 Spatial audio Dec. 11, 2012
8326641 Apparatus and method for encoding and decoding using bandwidth extension in portable terminal Dec. 4, 2012
8326640 Method and system for multi-band amplitude estimation and gain control in an audio CODEC Dec. 4, 2012
8326639 Audio data structure for lossy and lossless encoded extension data Dec. 4, 2012
8326638 Audio compression Dec. 4, 2012
8326618 Method and apparatus for lossless encoding of a source signal, using a lossy encoded data steam and a lossless extension data stream Dec. 4, 2012
8326608 Transcoding method, apparatus, device and system Dec. 4, 2012
8326607 Method and arrangement for enhancing speech quality Dec. 4, 2012
8326606 Sound encoding device and sound encoding method Dec. 4, 2012
8326132 Apparatus and method of encoding and decoding audio signal Dec. 4, 2012
8321789 Image browsing apparatus and image browsing method Nov. 27, 2012
8321230 Method and device for the hierarchical coding of a source audio signal and corresponding decoding method and device, programs and signals Nov. 27, 2012
8321229 Apparatus, medium and method to encode and decode high frequency signal Nov. 27, 2012
8321210 Audio encoding/decoding scheme having a switchable bypass Nov. 27, 2012
8320530 Method, apparatus and system for realizing a multimedia call Nov. 27, 2012
8315881 Content filtering for a digital audio signal Nov. 20, 2012
8315880 Method for binary coding of quantization indices of a signal envelope, method for decoding a signal envelope and corresponding coding and decoding modules Nov. 20, 2012
8315877 Encoding and detecting apparatus Nov. 20, 2012
8315861 Wideband speech decoding apparatus for producing excitation signal, synthesis filter, lower-band speech signal, and higher-band speech signal, and for decoding coded narrowband speech Nov. 20, 2012
8315396 Apparatus and method for generating audio output signals using object based metadata Nov. 20, 2012
8311843 Frequency band scale factor determination in audio encoding based upon frequency band signal energy Nov. 13, 2012
8311841 Encoding device, decoding device, and system thereof utilizing band expansion information Nov. 13, 2012
8311840 Frequency extension of harmonic signals Nov. 13, 2012
8311818 Transform coder and transform coding method Nov. 13, 2012
8311817 Systems and methods for enhancing voice quality in mobile device Nov. 13, 2012
8311657 Method and apparatus for efficiently accounting for the temporal nature of audio processing Nov. 13, 2012
8306828 Method and apparatus for audio signal expansion and compression Nov. 6, 2012
8306827 Coding device and coding method with high layer coding based on lower layer coding results Nov. 6, 2012
8306813 Encoding device and encoding method Nov. 6, 2012
8301281 High-frequency signal interpolation apparatus and high-frequency signal interpolation method Oct. 30, 2012
8300885 Methods for watermarking media data Oct. 30, 2012
8300833 Multichannel spectral mapping audio apparatus and method with dynamically varying mapping coefficients Oct. 30, 2012
8300820 Method of embedding a digital watermark in a useful signal Oct. 30, 2012
8296159 Apparatus and a method for calculating a number of spectral envelopes Oct. 23, 2012
8296158 Methods and apparatuses for encoding and decoding object-based audio signals Oct. 23, 2012
8296157 Apparatus and method for deciding adaptive noise level for bandwidth extension Oct. 23, 2012
8296156 Apparatus and method for encoding/decoding signal Oct. 23, 2012
8296155 Method and apparatus for decoding a signal Oct. 23, 2012
8295499 Audio information processing and attack detection apparatus and method Oct. 23, 2012
8295494 Enhancing audio with remixing capability Oct. 23, 2012

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