Patent ID: 8000960
Filing Date: 2011-08-16
Classification: G10L

Abstract:
1. A method for concealing the effect of a lost frame in a series of frames representing an encoded audio signal in a sub-band predictive coding system, comprising: decoding one or more received frames in the series of frames to generate a full-band output audio signal, wherein decoding the one or more received frames comprises generating a first-sub band decoded audio signal, generating a second sub-band decoded audio signal, and combining at least the first-sub band decoded audio signal and the second sub-band decoded audio signal to generate the full-band output audio signal; storing the first sub-band decoded audio signal and the second sub-band decoded audio signal; synthesizing a first synthesized sub-band audio signal, wherein synthesizing the first synthesized sub-band audio signal comprises performing waveform extrapolation based on the stored first sub-band decoded audio signal; synthesizing a second synthesized sub-band audio signal, wherein synthesizing the second synthesized sub-band audio signal comprises performing waveform extrapolation based on the stored second sub-band decoded audio signal; and combining the first synthesized sub-band audio signal and the second synthesized sub-band audio signal to generate a synthesized full-band output audio signal corresponding to the lost frame.