| 摘要 |
The invention concerns a method ( 300 ) and system ( 100 ) for improving voice quality of a vocoder ( 138, 158 ). The method includes the steps of monitoring ( 312 ) a pitch of a voice signal ( 400 ) at a transmitting unit ( 110 ); when the pitch of the voice signal reaches a predetermined threshold ( 840 ), shifting ( 326 ) the pitch of the voice signal to at least a portion of a predetermined range ( 810 ); transmitting ( 338 ) the pitch-shifted voice signal to a receiving unit ( 112 ); and at the receiving unit, reshifting ( 342 ) the pitch-shifted voice signal to a level that compensates the step of shifting the pitch of the voice signal at the transmitting unit.
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