Voice speed converter

Details Voice speed converter Voice speed converter

1997-09-16

1999-11-30

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704214, 704215, G01L 302

Patent

active

059959258

ABSTRACT:
A voice speed converter comprising a speech classifying unit for classifying an input speech signal into an unvoiced part and another part, a pitch frequency extracting unit for extracting a pitch frequency from the input speech signal and supplying it, a quasi-pitch frequency supplying unit for supplying a quasi-pitch frequency of fixed length, a voice speed converter for performing voice speed conversion processing on the input speech signal by the use of the pitch frequency or the quasi-pitch frequency, and a switch for controlling switching operations according to the classification result by the speech classifying unit, so as to send the quasi-pitch frequency to the voice speed converter when the input speech signal belongs to the unvoiced part, or so as to send the pitch frequency to the voice speed converter when the input speech signal belongs to another part.

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Funakai et al., "4 kbps Low Bit Rate Speech Response System", NEC Technical Report, vol. 48, No. Jun. 1995, pp. 10-13.
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