Title :
A fully vector quantised self-excited vocoder
Author :
Salami, Redwan A. ; Hanzo, Lajos ; Appleby, Derek G.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
A computationally efficient stochastic vector quantization (VQ) scheme for the quantization of LPC parameters with less than 25 bits is proposed. The complexity of the self-excited vocoder (SEV) is reduced by using fast algorithms based on an efficient representation of the innovation sequence. When the suggested VQ scheme is deployed in the improved SEV, good communications speech quality is obtained at 4.8 kb/s. When the bit rate is increased to 6.8 kb/s, near-toll-quality speech is achieved
Keywords :
encoding; filtering and prediction theory; speech analysis and processing; vocoders; 4.8 kbit/s; 6.8 kbit/s; LPC parameters; computationally efficient scheme; fast algorithms; near-toll-quality speech; speech quality; stochastic vector quantization; vector quantised self-excited vocoder; Bit rate; Delay; Filters; Linear predictive coding; Speech coding; Speech synthesis; Stochastic processes; Technological innovation; Vector quantization; Vocoders;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266379
