Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1998-04-02
2000-08-22
Voeltz, Emanuel Todd
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704230, 704201, 704205, G06F 1100
Patent
active
061086258
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 comprise the steps of: (i) obtaining gamut bit allocation information representing the number of bits of the quantized data corresponding to the respective subbands belonging to a layer to be coded; (ii) obtaining the number of bits allocated to the respective subbands within each subband size of the layers; (iii) generating an index representing the presence of quantized data for predetermined frequency components forming the subbands for the quantized data corresponding to the number of allocated bits; and (iv) generating bitstreams by coding the quantized data corresponding to the gamut bit allocation information, quantization step size, index and number of bits allocated to the respective subbands, by a predetermined coding method.
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Samsung Electronics Co,. Ltd.
Sofocleous M. David
Todd Voeltz Emanuel
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