Title :
A 16 kb/s APC system with adaptive postfilter and evaluation of its performance
Author :
Zarkadis, D.J. ; Evans, B.G.
Author_Institution :
Dept. of Electron. Eng., Surrey Univ., Guildford, UK
Abstract :
An adaptive predictive coder (APC) with backward adaptive short-term predictor is presented for operation at 16 kb/s. Adaptive postfiltering is applied in the output of the decoder. The performance of the coder is evaluated both objectively and subjectively for fixed and switched degrees of postfiltering. Based on a stimulus-response model for the subjective testing method the performance of the coder is expressed in terms of Q-equivalent values
Keywords :
encoding; filtering and prediction theory; performance evaluation; speech analysis and processing; 16 kbits/s; Q-equivalent values; adaptive postfiltering; adaptive predictive coder; backward adaptive short-term predictor; decoder; speech analysis; stimulus-response model; subjective testing method; Adaptive systems; Decoding; Encoding; Entropy; Filters; Noise reduction; Quantization; Speech analysis; Testing; Transfer functions;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196664
