Proceedings of the Acoustical Society of Korea Conference (한국음향학회:학술대회논문집)
- 1994.06c
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- Pages.199-204
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- 1994
Performance improvement and Realtime implementation in CELP Coder
CELP 보코더의 성능 개선 및 실시간 구현
Abstract
In this paper, we researched abut CELP speech coding algorithm using efficlent pseudo-stochastic block codes, adaptive-codebook and improved fixed-gain codebook. The pseudo-stochastic block codes refer to stochastically populated block codes in which the adjacent codewords in an innovation codebook are non-independent. The adaptive-codebook was made with previous prediction speech data by storage-shift register. This CELP coding algorithm enables the coding of toll quality speech at bit rates from 4.8kbits/s to 9.6 kbits/s. This algorithm was realized TMS320C30 microprocessor in realtime.
Keywords