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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
8195469 Device, method, and program for encoding/decoding of speech with function of encoding silent period Jun. 5, 2012
8195463 Method for the selection of synthesis units Jun. 5, 2012
8195452 High-quality encoding at low-bit rates Jun. 5, 2012
8195451 Apparatus and method for detecting speech and music portions of an audio signal Jun. 5, 2012
8194862 Video game system with mixing of independent pre-encoded digital audio bitstreams Jun. 5, 2012
8190441 Playback of compressed media files without quantization gaps May. 29, 2012
8190440 Sub-band codec with native voice activity detection May. 29, 2012
8190427 Compander which uses adaptive pre-emphasis filtering on the basis of linear prediction May. 29, 2012
8189813 Audio system and method for effectively reproducing sound in accordance with the distance between a source and a position where the sound is heard in virtual space May. 29, 2012
8189746 Voice rendering of E-mail with tags for improved user experience May. 29, 2012
8185403 Method and apparatus for encoding and decoding an audio signal May. 22, 2012
8185388 Apparatus for improving packet loss, frame erasure, or jitter concealment May. 22, 2012
8185386 Method and apparatus for performing packet loss or frame erasure concealment May. 22, 2012
8185382 Unified treatment of resolved and unresolved harmonics May. 22, 2012
8185381 Unified filter bank for performing signal conversions May. 22, 2012
8184616 Changing codec information to provide voice over internet protocol (VoIP) terminal with coloring service May. 22, 2012
8180648 Method and system for dual mode subband acoustic echo canceller with integrated noise suppression May. 15, 2012
8180631 Apparatus and method of processing an audio signal, utilizing a unique offset associated with each coded-coefficient May. 15, 2012
8175888 Enhanced layered gain factor balancing within a multiple-channel audio coding system May. 8, 2012
8175729 Preserving matrix surround information in encoded audio/video system and method May. 8, 2012
8175145 Post-processing for reducing quantization noise of an encoder during decoding May. 8, 2012
8170884 Use of voice-to-remaining audio (VRA) in consumer applications May. 1, 2012
8170883 Method and apparatus for embedding spatial information and reproducing embedded signal for an audio signal May. 1, 2012
8170882 Multichannel audio coding May. 1, 2012
8170879 Periodic signal enhancement system May. 1, 2012
8170871 Signal coding and decoding May. 1, 2012
8165889 Slot position coding of TTT syntax of spatial audio coding application Apr. 24, 2012
8165882 Method, apparatus and program for speech synthesis Apr. 24, 2012
8165871 Encoding method and apparatus for efficiently encoding sinusoidal signal whose magnitude is less than masking value according to psychoacoustic model and decoding method and apparatus for deco Apr. 24, 2012
8160890 Audio signal coding method and decoding method Apr. 17, 2012
8160889 System for providing an acoustic signal with extended bandwidth Apr. 17, 2012
8160888 Generation of multi-channel audio signals Apr. 17, 2012
8160887 Adaptive interpolation in upsampled audio signal based on frequency of polarity reversals Apr. 17, 2012
8160871 Speech coding method and apparatus which codes spectrum parameters and an excitation signal Apr. 17, 2012
8160869 Method and apparatus for encoding continuation sinusoid signal information of audio signal and method and apparatus for decoding same Apr. 17, 2012
8160868 Scalable decoder and scalable decoding method Apr. 17, 2012
8156433 Embodied music system Apr. 10, 2012
8155955 Speech decoding method and apparatus which generates an excitation signal and a synthesis filter Apr. 10, 2012
8155348 Post phase-inverter volume control Apr. 10, 2012
8155153 Apparatus and method of encoding and decoding audio signal Apr. 10, 2012
8155152 Apparatus and method of encoding and decoding audio signal Apr. 10, 2012
8155144 Apparatus and method of encoding and decoding audio signal Apr. 10, 2012
8150702 Stereo audio encoding device, stereo audio decoding device, and method thereof Apr. 3, 2012
8150701 Method and apparatus for embedding spatial information and reproducing embedded signal for an audio signal Apr. 3, 2012
8150691 Arrangement and method for reproducing audio data as well as computer program product for this Apr. 3, 2012
8150682 Adaptive filter pitch extraction Apr. 3, 2012
8150048 System and method for testing audio device of motherboard Apr. 3, 2012
8149878 Apparatus and method of encoding and decoding audio signal Apr. 3, 2012
8149877 Apparatus and method of encoding and decoding audio signal Apr. 3, 2012
8149876 Apparatus and method of encoding and decoding audio signal Apr. 3, 2012

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