Speech pitch coding system

Details Speech pitch coding system Speech pitch coding system

1994-08-26

1997-09-09

MacDonald, Allen R.

Railways

Traction

Cable

704223, G10L 302

Patent

active

056664648

ABSTRACT:
A plurality of pitch period transition paths are extracted by a pitch tracking over a frame, and a path of a minimum average prediction gain over the frame is selected from the extracted paths. A subsequent preliminary pitch selection may be executed in a sub-frame processing to select a plurality of candidates from the neighborhood of the pitch of the transition path selected for each sub-frame by using the inner product of the input speech signal and each codevector. Finally, a pitch period having a minimum waveform distortion is selected for each sub-frame.

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