Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion
Patent
1997-11-26
2000-09-19
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
704501, 704222, 704230, G10L 1900
Patent
active
061226181
ABSTRACT:
A scalable audio coding/decoding method and apparatus are provided. The coding method includes the steps of (a) signal-processing input audio signals and quantizing the same for each predetermined coding band, (b) coding the quantized data corresponding to the base layer within a predetermined layer size, (c) coding the quantized data corresponding to the next enhancement layer of the coded base layer and the remaining quantized data uncoded and belonging to the enhancement layer, within a predetermined layer size, and (d) sequentially performing the layer coding steps for all layers, wherein the steps (b), (c) and (d) each include the steps of (e) representing the quantized data corresponding to a layer to be coded by digits of a predetermined same number, and (f) coding the most significant digit sequences composed of most significant digits of the magnitude data composing the represented digital data. The method can accommodate various users' request and transmission channels, and the complexity of the encoder and decoder can be reduced. Also, according to the performance of decoders or bandwidth/congestion of transmission channels or by users' request, the bitrate or complexity can be controlled.
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Azad Abul K.
Hudspeth David R.
Samsung Electronics Co,. Ltd.
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