SPEECH SIGNAL RECEIVING DEVICE, SPEECH PACKET LOSS COMPENSATING METHOD USED THEREFOR, PROGRAM IMPLEMENTING THE METHOD, AND RECORDING MEDIUM WITH THE RECORDED PROGRAM

摘要

PROBLEM TO BE SOLVED: To easily perform the processing of speech packet loss compensation. SOLUTION: Speech packets stored in a receiving buffer (12) are read out in the increasing order of numbers, decoded, and speech signals as many as a predetermined number of feames are put in a delay buffer unit (19). A speech signal having the smallest frame number is output from the delay buffer unit, and put in an output buffer (14). When a frame output from the delay buffer unit has packet loss, a speech waveform interpolation processing unit (17) cuts waveforms of a pitch length out of a frame waveform from the output buffer (14) and a frame waveform from the delay buffer unit (19), arranges them one after the other to generate two frame waveforms, and generates an interpolated speech signal from them. COPYRIGHT: (C)2008,JPO&INPIT