Proceedings of the Acoustical Society of Korea Conference (한국음향학회:학술대회논문집)
- 1994.06a
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- Pages.904-911
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- 1994
ON A REDUCTION OF PITCH SEARCHING TIME BY PREPROCESSING IN THE CELP VOCODER
- Kim, Daesik (Department of Telecommunication Engineering Soongsil University) ;
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Bae, Myungjin
(Department of Telecommunication Engineering Soongsil University)
;
- Kim, Jongjae (IC Technology Deot, ETRI) ;
- Byun, Kyungjin (IC Technology Deot, ETRI) ;
- Han, Kichun (IC Technology Deot, ETRI) ;
- Yoo, Hahyoung (IC Technology Deot, ETRI)
- Published : 1994.06.01
Abstract
Code Excited Linear Prediction (CELP) speech coders exhibit good performance at data rates below 4.8 kbps. The major drawback to CELP type coders is their many computation. In this paper, we propose a new pitch search method that preserves the quality of the CELP vocoder with reducing complexity. The basic idea is to apply the preprocessing technique beforehand grasping the autocorrelation property of speech waveform. By using the proposed method, we can get approximately 77% complexity reduction in the pitch search.
Keywords