Title :
Switched predictor adaptation of DPCM-AQB speech coder using an imbedded vector quantisation
Author_Institution :
University of Linköping, Department of Electrical Engineering, Linköping, Sweden
Abstract :
An adaptive differential pulse-code-modulation speech coder with a switched predictor adaptation scheme is described. The predictor adaptation is done by switching one of the several predetermined predictors stored both at the encoder and the decoder. The selection of the predictor is controlled by a vector quantiser. The tradeoff between the performance and the extra side information that needs to be transmitted is evaluated for bit rates of 16, 24 and 32 Kbit/s.
Keywords :
encoding; filtering and prediction theory; pulse-code modulation; speech analysis and processing; adaptive differential pulse-code-modulation; bit rates; imbedded vector quantisation; side information; speech coder; switched predictor adaptation scheme;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850315
