Although the speech quality of the code excited linear prediction (celp) coder at 4800 bit/s is relatively good, it is still perceived as rough or noisy. The authors propose a residual shaping method that produces, wi...
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Although the speech quality of the code excited linear prediction (celp) coder at 4800 bit/s is relatively good, it is still perceived as rough or noisy. The authors propose a residual shaping method that produces, without signal distortion, quality comparable to that obtained by adaptive postfiltering. The proposed method is particularly effective in the multiple tandeming environment.
celp speech coders give good performance but require considerable computational power. Earlier work showed how singular value decomposition can be used to speed up the calculations required for codebook search in the ...
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celp speech coders give good performance but require considerable computational power. Earlier work showed how singular value decomposition can be used to speed up the calculations required for codebook search in the celp. The bidiagonal decomposition proposed by the author is simpler and results in a fast algorithm with fixed running time
Perceptual linear prediction (PLP) is widely used in speech recognition systems as a feature extraction method. Also code-Exited Linear Prediction coder (celp) is one of the well known speech coders which widely used ...
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ISBN:
(纸本)9780769539256
Perceptual linear prediction (PLP) is widely used in speech recognition systems as a feature extraction method. Also code-Exited Linear Prediction coder (celp) is one of the well known speech coders which widely used in communication systems. In this paper the application of PLP in speech coding has been discussed. In the first stage the parameters of formant synthesis filter are determined by applying PLP algorithms. Then these parameters are used in coder, code-exited linear prediction coder, to improve the efficiency of this kind of coder. The experiments show promising result in some cases.
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