Speech encoding apparatus and speech encoding and decoding appar

Details Speech encoding apparatus and speech encoding and decoding appar Speech encoding apparatus and speech encoding and decoding appar

1996-12-31

2000-04-18

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704220, 704207, 704224, G10L 1900

Patent

active

060526610

ABSTRACT:
A speech encoding apparatus capable of averting the deterioration of synthesis speech quality in encoding the input speech and of generating a high-quality synthesis output speech through small quantities of computation. The apparatus includes a target speech generation part for generating from the input speech a target speech vector of a vector length corresponding to a delay parameter; an adaptive codebook for generating from previously generated excitation signals an adaptive vector of the vector length corresponding to the delay parameter; an adaptive code search part for evaluating the distortion of a synthesis vector obtained from the adaptive vector with respect to the target speech vector so as to search for the adaptive vector conducive to the least distortion; and a frame code generation part for generating an excitation signal of a frame length from the adaptive vector conducive to the least distortion.

REFERENCES:
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patent: 5579433 (1996-11-01), Jarvinen
Kroon et al., "Pitch Predictors with High Temporal Resolution," pp. 661-664, International Conference on Acoustics, Speech, and Signal Processing, Apr. 3-6, 1990.
Chen et al., "8 KB/S Low-Delay Celp Coding of Speech," pp. 25-31, Speech and Audio Coding for Wireless and Network Applications, Jan. 1, 1993.

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