Title :
Low-delay code-excited linear-predictive coding of wideband speech at 32 kbps
Author :
Ordentlich, Erik ; Shoham, Yair
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
The authors report on the use of the codebook-excited linear-predictive (CELP) algorithm for 32 kb/s low-delay (LD-CELP) coding of wideband speech. The main problem associated with wideband coding, namely, spectral noise weighting, is discussed. The authors propose an enhanced noise weighting technique and demonstrate its efficiency via subjective listening tests. In these tests, involving 20 listeners and 8 test sentences, the average rating for the proposed 32 kb/s LD-CELP was essentially equal to that of the 65 kb/s standard (G.722) CCITT wideband coder
Keywords :
encoding; filtering and prediction theory; noise; speech analysis and processing; 32 kbit/s; G.722 CCITT wideband coder standard; LD-CELP; code-excited linear-predictive coding; low delay coding; spectral noise weighting; subjective listening tests; test sentences; wideband speech coding; Filters; ISDN; Linear predictive coding; Oral communication; Signal processing algorithms; Speech coding; Speech processing; Teleconferencing; Testing; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0003-3
DOI :
10.1109/ICASSP.1991.150266
