Block Constrained Trellis Coded Vector Quantization of LSF Parameters for Wideband Speech Codecs

ETRI Journal

关键词: LSF parameters;    trellis coded vector quantization;    quantization;    Speech coding;   

Others  :  1185646
DOI  :  10.4218/etrij.08.0208.0129

【 摘 要 】

In this paper, block constrained trellis coded vector quantization (BC-TCVQ) is presented for quantizing the line spectrum frequency parameters of the wideband speech codec. Both a predictive structure and a safety-net concept are combined into BC-TCVQ to develop the predictive BC-TCVQ. The performance of this quantization is compared with that of the linear predictive coding vector quantizer used in the AMR-WB codec, demonstrating reductions in spectral distortion.

   

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