Title :
Predictive quantization of spectral amplitudes for harmonic coders
Author :
Prased, R. ; Chan, Wai-Yip
Author_Institution :
BBN Technol., Cambridge, MA, USA
Abstract :
We present a novel predictive vector quantization scheme for coding the variable-dimension spectral amplitude vectors produced by harmonic coders. The scheme has a safety-net prediction structure, but it uses analysis-by-synthesis codebook search. A “closed-loop” codebook design algorithm is devised. Significant improvement over conventional predictive VQ design methods is obtained
Keywords :
harmonic analysis; prediction theory; spectral analysis; speech coding; speech synthesis; vector quantisation; analysis-by-synthesis codebook search; cepstral parameters; closed-loop codebook design algorithm; discrete all pole model; discrete cepstrum modelling; harmonic coders; harmonic speech coding; predictive VQ; predictive vector quantization; safety-net prediction structure; spectral amplitudes; speech spectrum representation; variable-dimension spectral amplitude vectors; Algorithm design and analysis; Cepstral analysis; Cepstrum; Design methodology; Digital audio players; Frequency; Predictive models; Sampling methods; Speech coding; Vector quantization;
Conference_Titel :
Speech Coding, 2000. Proceedings. 2000 IEEE Workshop on
Conference_Location :
Delavan, WI
Print_ISBN :
0-7803-6416-3
DOI :
10.1109/SCFT.2000.878390
