Title :
Channel codes that exploit the residual correlation in CELP-encoded speech
Author :
Alajaji, Fady ; Phamdo, Nam ; Fuja, Tom
Author_Institution :
Dept. of Math. & Stat., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
This paper describes methods by which the residual correlation in CELP-encoded speech can be exploited by an appropriately designed channel decoder. Specifically, the line spectrum pair (LSP) redundancy in Federal Standard 1016 CELP is quantified and used to effect near-MAP decoding of Reed-Solomon and convolutional codes. Coding gains of up to 3.6 dB are obtained over conventional ML algorithms
Keywords :
linear predictive coding; CELP-encoded speech; FS 1016 CELP; Federal Standard 1016 CELP; Reed-Solomon codes; channel codes; channel decoder; coding gains; convolutional codes; line spectrum pair redundancy; near-MAP decoding; residual correlation; AWGN; Block codes; Convolutional codes; Educational institutions; Mathematics; Maximum likelihood decoding; Redundancy; Reed-Solomon codes; Speech coding; Viterbi algorithm;
Conference_Titel :
Information Theory, 1995. Proceedings., 1995 IEEE International Symposium on
Conference_Location :
Whistler, BC
Print_ISBN :
0-7803-2453-6
DOI :
10.1109/ISIT.1995.535801
