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A new wavelet transform-based CELP coder with band selection and selective VQ

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3 Author(s)
Dong-Il Chang ; Dept. of Electron. Eng., Seoul Nat. Univ., South Korea ; Young-Kwon Cho ; Ann, S.

In this paper, we present a new coding algorithm of discrete wavelet transform (DWT) coefficients in a wavelet transform-based CELP coder, and introduce a new WT-based CELP coder, named the band selection wavelet transform-based CELP (BS-WTCELP). The proposed algorithm adopts a band selection and selective vector quantization (VQ) of DWT coefficients. We realize this band selection and selective VQ scheme by using a classified VQ structure. Experimental results have shown that the proposed coder achieves about 0.41-1.14 dB improvement in segmental SNR while considerably reducing the computational complexity compared with the conventional coders

Published in:

Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on  (Volume:1 )

Date of Conference:

30 Apr-3 May 1995