Title :
Multi-band CELP coding of speech and music
Author :
Ubale, Anil ; Gersho, Allen
Author_Institution :
Dept. of Electr. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
A novel low-delay wideband speech coder, called multi-band CELP (MB-CELP), overcomes the major obstacles usually associated with two traditional CELP approaches to wideband speech coding, namely, fullband CELP and splitband CELP. The new MB-CELP coder employs a multiband bank of off-line filtered excitation codebooks, fullband linear prediction synthesis, and minimization of the error between original and synthesized audio signals over the full frequency range. Two versions of MB-CELP coder at 16 and 24 kbps are described. Subjective comparison test results show that these coders perform better than G.722 coder at 48 and 56 kbps respectively
Keywords :
audio coding; delays; linear predictive coding; music; signal synthesis; speech coding; telecommunication equipment testing; vocoders; 16 kbit/s; 24 kbit/s; 48 kbit/s; 56 kbit/s; G.722 coder; ITU-T; MB-CELP coder; error minimization; frequency range; fullband CELP; fullband linear prediction synthesis; low-delay wideband speech coder; multi-band CELP coding; multiband CELP; music coding; off-line filtered excitation codebooks; speech coding; splitband CELP; subjective comparison test results; synthesized audio signals; wideband speech coding; Delay; Digital signal processing; Filter bank; Frequency; Multiple signal classification; Nonlinear filters; Signal synthesis; Speech coding; Speech synthesis; Wideband;
Conference_Titel :
Speech Coding For Telecommunications Proceeding, 1997, 1997 IEEE Workshop on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-4073-6
DOI :
10.1109/SCFT.1997.623916
