Speed-variable speech signal reproduction apparatus and method

Details Speed-variable speech signal reproduction apparatus and method Speed-variable speech signal reproduction apparatus and method

1996-08-12

1999-01-26

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704214, G10L 302

Patent

active

058647929

ABSTRACT:
A speed-variable speech signal reproduction apparatus and method for playing back speech signals stored in a storage medium at an adjusted speed while preventing any degradation in tone or loss of the speech signals from occurring. The method includes the steps of detecting the pitch of input digital speech signals using an average magnitude difference function, separating voice and voiceless sounds of the speech signals from each other based on the result of the detecting step, temporarily storing the separated voiceless sound, modulating the lengths of the speech signals by copying or eliminating a part of the separated voice sound, and synthesizing the modulated voice sound step with the voiceless sound temporarily stored in the storing step. The apparatus includes the a detector for detecting the pitch of input digital speech signals using an average magnitude difference function, a device for separating voice and voiceless sounds of the speech signals from each other based on the result of the detecting step, a memory for temporarily storing the separated voiceless sound, a modulator for modulating the lengths of the speech signals by copying or eliminating a part of the separated voice sound, and a synthesizer for synthesizing the modulated voice sound step with the voiceless sound temporarily stored in the storing step.

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