Patent ID: 8731910

Claim:
A compensation method for audio frame loss in a modified discrete cosine transform domain, the method comprising: step a, when a frame currently lost is a P th frame, a decoder obtaining a set of frequencies to be predicted, and for each frequency in the set of frequencies to be predicted, the decoder using phases and amplitudes of a plurality of frames before a (P−1) th frame in a MDCT-MDST (modified discrete cosine transform-modified discrete sine transform) domain to predict a phase and an amplitude of the P th frame in the MDCT-MDST domain, the decoder using the predicted phase and amplitude of the P th frame in the MDCT-MDST domain to obtain a MDCT (modified discrete cosine transform) coefficient of the P th frame at said each frequency, wherein, the (P−1) th frame is a previous frame of the P th frame; step b, for any frequency in a frame outside the set of frequencies to be predicted, the decoder using MDCT coefficients of a plurality of frames before the P th frame to calculate the MDCT coefficient of the P th frame at the frequency; step c, the decoder performing an IMDCT (inverse modified discrete cosine transform) for the MDCT coefficients of the P th frame at all frequencies to obtain the time domain signal of the P th frame.