Distortion performance of vector quantization for LPC voice coding
Biing-Hwang Fred Juang, David Y. Wong, Alfred Gray · IEEE Transactions on Acoustics Speech and Signal Processing · 1982
The distortion performance of the vector quantization approach for LPC voice coding is examined both analytically and experimentally. Analytically, interpretations of the interparameter coupling effects of a distortion measure and the clustering nature of the algorithm for LPC vector quantization are obtained to show its relationship with the residual minimization process in LPC analysis. Experimentally, a large database of speech is used to compare its performance and properties to scalar quantization. The results lend further insight into the superior performance of vector quantization.