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Packet Loss Concealment Scheme for Subband Predictive Coding Based on Extrapolation of Full-Band Audio Waveforms
Packet Loss Concealment Scheme for Subband Predictive Coding Based on Extrapolation of Full-Band Audio Waveforms
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机译:基于全音频波形外推的子带预测编码丢包掩盖方案
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摘要
A technique is described 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. In accordance with the technique, a first synthesized sub-band audio signal is synthesized, wherein synthesizing the first synthesized sub-band audio signal comprises performing waveform extrapolation based on a stored first sub-band decoded audio signal. A second synthesized sub-band audio signal is also synthesized, wherein synthesizing the second synthesized sub-band audio signal comprises performing waveform extrapolation based on the stored second sub-band decoded audio signal. The first synthesized sub-band audio signal and the second synthesized sub-band audio signal are combined to generate a synthesized full-band output audio signal corresponding to a lost frame.
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