Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion
Patent
1997-11-26
2000-07-25
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
704229, 704230, G10L 1900
Patent
active
060946369
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.
REFERENCES:
patent: 5109417 (1992-04-01), Fielder et al.
patent: 5327520 (1994-07-01), Chen
patent: 5357594 (1994-10-01), Fielder
patent: 5495298 (1996-02-01), Uchida et al.
patent: 5511094 (1996-04-01), Lee et al.
patent: 5613035 (1997-03-01), Kim
patent: 5617145 (1997-04-01), Huang et al.
patent: 5621660 (1997-04-01), Chaddha et al.
patent: 5621856 (1997-04-01), Akagiri
patent: 5627937 (1997-05-01), Kim
patent: 5642111 (1997-06-01), Akagiri
patent: 5664056 (1997-09-01), Akagiri
patent: 5696876 (1997-12-01), Lee
patent: 5734657 (1998-03-01), Kim
patent: 5737720 (1998-04-01), Miyamori et al.
patent: 5737721 (1998-04-01), Kwon
patent: 5752225 (1998-05-01), Fielder
patent: 5758315 (1998-05-01), Mori
patent: 5761636 (1998-06-01), Bolton et al.
patent: 5784533 (1998-07-01), Van de Kerkhof et al.
patent: 5794179 (1998-08-01), Yamabe
patent: 5809474 (1998-09-01), Park
B Grill et al., ISO/IEC JTCI/SC 29/WG11 MPEG 95/0426, University of Erangen, FhG-IIS, Oct. 1995.
Davis Pan, Motorola, "A Tutorial on MPEG/Auddio Compression," IEEE MultiMedia, vol. 2, Issue 2, Summer 1995, pp. 60-74.
Azad Abul K.
Hudspeth David R.
Samsung Electronics Co,. Ltd.
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