Speech compression coding with discrete cosine transformation of

Details Speech compression coding with discrete cosine transformation of Speech compression coding with discrete cosine transformation of

1997-06-18

1999-08-24

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, 704222, 704232, 704203, G10L 904

Patent

active

059436441

ABSTRACT:
A digital speech waveform is divided into frames and sub-frames. Spectrum envelope information, pitch elements and stochastic elements are extracted and coded for the frames and sub-frames. A second error signal is calculated as a result of subtracting, from the sub-frames, pitch component speech generated from the pitch elements and spectrum envelope elements. The second error signal is coded so as to obtain the stochastic elements as a result of transforming the second error signal into a signal of a frequency domain through discrete cosine transformation and coding coefficients of the transformed domain.

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