Pitch post-filter

Details Pitch post-filter Pitch post-filter

1994-04-29

1996-08-06

Knepper, David D.

395 22, G10L 302

Patent

active

055442781

ABSTRACT:
A filter utilizes future and past information for at least some of the subframes. Specifically, the filter receives a frame of synthesized speech and, for each subframe of the frame of synthesized speech, produces a signal which is a function of the subframe and of windows of earlier and later synthesized speech. Each window is utilized only when it provides an acceptable match to the subframe.

REFERENCES:
patent: 4969192 (1990-11-01), Chen et al.
patent: 5293449 (1994-03-01), Tzeng
patent: 5307441 (1994-04-01), Tzeny
Kroon et al., "A Class of Analysis-by-Synthesis Predictive Coders for High Quality Speech Coding at Rates Between 4.8 and 16 Kbits/s," IEEE Journal on Selected Areas in Commo., vol. 6, No. 2, Feb. 1988, pp. 353-363.

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