A Predictive Phase Vector Quantization Method in WI Speech Coding

Chen Yue; Bao Chang-chun

doi:10.3724/SP.J.1146.2006.00608

Volume 29 Issue 11

Jan. 2011

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Chen Yue, Bao Chang-chun . A Predictive Phase Vector Quantization Method in WI Speech Coding[J]. Journal of Electronics & Information Technology, 2007, 29(11): 2672-2675. doi: 10.3724/SP.J.1146.2006.00608

Citation:

Chen Yue, Bao Chang-chun . A Predictive Phase Vector Quantization Method in WI Speech Coding[J]. Journal of Electronics & Information Technology, 2007, 29(11): 2672-2675. doi: 10.3724/SP.J.1146.2006.00608

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A Predictive Phase Vector Quantization Method in WI Speech Coding

doi: 10.3724/SP.J.1146.2006.00608

Received Date: 2006-05-08
Rev Recd Date: 2006-09-30
Publish Date: 2007-11-19

Abstract

Abstract

In traditional low bit-rate speech coding, considering that ears are not sensitive to phase information, the phase information is often neglected, and this will result in coarse and harsh speech quality, and it even may lead to inflection in pitch. In order to obtain a high-quality speech codec, the phase information of speech should be included in codec. In this paper, the phase redundancy is reduced further based on the dispersion phase vector quantization method. In the waveform interpolation (WI) speech coding model, the difference of SEWs phase spectra of conjoint frames is quantized using predictive vector quantization. The result of this scheme reveals that the speech quality is improved, and its naturalness and articulation are increased greatly. Subjective A/B listening test indicates that the reconstructed speechs quality of this method is better than that of fixed phase with 4-6 bit. Compared with the dispersion phase vector quantization method, the synthesis speech is slightly improved for female speakers.

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References(1)

References

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