Speech encoding and decoding method and electronic apparatus...

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Reexamination Certificate

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C704S219000, C704S220000, C704S230000

Reexamination Certificate

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06842732

ABSTRACT:
A speech encoding method of generating a synthesized speech signal by using an excitation signal generated by using an adaptive codebook storing a past excitation signal includes the steps of modifying an excitation signal used to generate a synthesized speech signal by filter processing, and storing the modified excitation signal in the adaptive codebook.

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patent: 10-149200 (1998-06-01), None
patent: 2000-122698 (2000-04-01), None
Taniguchi et al., “Pitch Sharpening for Perceptually Improved CELP, and the Sparse-Delta Codebook for Reduced Computation”, Speech Processing 1, International Conference on Acoustics, Speech, and Signal Processing, May 14-17, 1991, Toronto, Ontario, Canada, IEEE, vol. 1, pp. 241-244.
Kroon et al., “Strategies for Improving the Performance of CELP Coders at Low Bit Rates”, IEEE, Apr. 11, 1988, pp. 151-154.
Wang et al., “Improved Excitation For Phonetically-Segmented VXC Speech Coding Below 4 KB/s”, Globecom '90, IEEE Global Telecommunications Conference & Exhibition, San Diego, CA, Dec. 2-5, 1990, IEEE, vol. 2, Dec. 2, 1990, pp. 946-950.
Schroeder et al., “Code-Excited Linear Prediction (CELP): High-Quality Speech at Very Low Bit Rates,” IEEE (1985), pp. 25.1.1-25.1.4.

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