DocumentCode
1743955
Title
Adaptive bit allocation for LSP parameter quantization
Author
Hui, Fang ; McLoughlin, I.V.
Author_Institution
Sch. of Comput. Eng., Nanyang Technol. Inst., Singapore
fYear
2000
fDate
2000
Firstpage
419
Lastpage
421
Abstract
Line spectral pairs (LSPs) convey vocal tract information for reconstruction of speech in an analysis-synthesis speech coding system. Quantization of LSP parameters is necessary to reduce bit-rate, but causes unavoidable degradation in quality. This paper proposes an adaptive quantization method to reduce bit-rate whilst maintaining reasonable speech quality. The method exploits the observed relationship between LSP locations and underlying speech characteristics
Keywords
adaptive signal processing; quantisation (signal); speech coding; LSP locations; LSP parameter quantization; adaptive bit allocation; adaptive quantization method; analysis-synthesis speech coding system; bit-rate reduction; line spectral pairs; quality degradation; speech characteristics; speech quality; speech reconstruction; vocal tract information; Bandwidth; Bars; Bit rate; Degradation; Information analysis; Linear predictive coding; Quantization; Spectral analysis; Speech analysis; Speech coding;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 2000. IEEE APCCAS 2000. The 2000 IEEE Asia-Pacific Conference on
Conference_Location
Tianjin
Print_ISBN
0-7803-6253-5
Type
conf
DOI
10.1109/APCCAS.2000.913525
Filename
913525
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