Multiband Waveform Interpolation Speech Coding Algorithm at 2.4 kbit/s

Tang Yi-bin; Huang Rong; Wu Zhen-yang

doi:10.3724/SP.J.1146.2009.00613

Volume 32 Issue 5

May 2010

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Tang Yi-bin, Huang Rong, Wu Zhen-yang. Multiband Waveform Interpolation Speech Coding Algorithm at 2.4 kbit/s[J]. Journal of Electronics & Information Technology, 2010, 32(5): 1077-1082. doi: 10.3724/SP.J.1146.2009.00613

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Tang Yi-bin, Huang Rong, Wu Zhen-yang. Multiband Waveform Interpolation Speech Coding Algorithm at 2.4 kbit/s[J]. Journal of Electronics & Information Technology, 2010, 32(5): 1077-1082. doi: 10.3724/SP.J.1146.2009.00613

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Multiband Waveform Interpolation Speech Coding Algorithm at 2.4 kbit/s

doi: 10.3724/SP.J.1146.2009.00613

Received Date: 2009-04-24
Rev Recd Date: 2009-09-25
Publish Date: 2010-05-19

Abstract

Abstract

In the traditional characteristic waveform interpolation speech coding, the high frequency harmonics of the synthetic speech are usually lost, which makes the speech feel noisy, due to the phase information neglect of the characteristic waveform and the whole characteristic waveform alignment. In order to improve the synthetic speech quality, the multiband surd/sonant flag is first introduced. The phase spectrum of the slowly/rapidly evolving waveform is estimated with the waveform interpolation speech coding model depending on the multiband surd /sonant flag. Then the partial characteristic waveform alignment is used in the speech synthesis section and a 2.4 kbit/s multiband waveform interpolation speech coding algorithm is proposed finally. Compared with the traditional characteristic waveform algorithm, the new algorithm can distinctly improve the speech definition. Compared with the standard 2.4 kbit/s MELP algorithm, the synthetic speech quality is also slightly better.

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References(1)

References

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