Title :
Multipulse excitation codebook design and fast search methods for CELP speech coding
Author :
Tzeng, Forrest F.
Author_Institution :
Comsat Lab., Clarksburg, MD, USA
fDate :
28 Nov-1 Dec 1988
Abstract :
Presents an efficient method for multipurpose excitation coding using direct vector quantization. This method is then extended to the design of the excitation codebook for a CELP (code excited linear predictive) coder. For the best excitation-vector search at low data rates, an approach combining direct vector quantization and an analysis-by-synthesis procedure is used. Computer simulation results for a 4.8 kb/s speech coder based on the new excitation codebook are presented
Keywords :
analogue-digital conversion; codes; digital simulation; encoding; filtering and prediction theory; speech analysis and processing; 418 kbit/s; CELP speech coding; analysis-by-synthesis procedure; code excited linear predictive; codebook design; computer simulation; direct vector quantization; excitation-vector search; fast search methods; multipurpose excitation coding; Bit rate; Books; Computational complexity; Distortion measurement; Encoding; Filters; Narrowband; Search methods; Speech coding; Vector quantization;
Conference_Titel :
Global Telecommunications Conference, 1988, and Exhibition. 'Communications for the Information Age.' Conference Record, GLOBECOM '88., IEEE
Conference_Location :
Hollywood, FL
DOI :
10.1109/GLOCOM.1988.25909
