| 摘要 |
PROBLEM TO BE SOLVED: To suppress propagation of quality deterioration of a decoded speech signal due to frame disappearance in a communication system using a CELP type speech encoding device. SOLUTION: The speech encoding device detects pitch peak position information of a speech signal and transmits the pitch peak position information to a speech decoding device together with the encoded speech signal and then if the speech signal has a lost frame, the speech decoding device can compensate quality deterioration due to the lost frame according to the pitch peak position information. COPYRIGHT: (C)2004,JPO |
