| 摘要 |
<p>A method and system for error concealment in a bitstream (230) of encoded audio signals, wherein the audio signals include stationary sounds and beat-type sounds. In the encoder, the audio characteristics of the beat-type sounds are detected in the encoded audio signals and grouped into a plurality of clusters. A codebook (130) including the audio characteristics of the beat-type sounds and the clusters is provided to a decoder (40) to be stored in a buffer (32). The ancillary (150) data in the bitstream (230), including information indicative of the clusters, is provided to the decoder (40) so that the decoder (40) can reconstruct the beat-type sounds based on the ancillary data (150) and the stored codebook (130) if the audio data intervals is defective. The codebook (130) is provided to the decoder (40) before streaming starts, but the audio characteristics of the beat-type sounds and the clusters can be obtained by the decoder (40) on the fly.</p> |
