Device and Method for Frame Erasure Concealment in a PCM Codec Interoperable with the ITU-T Recommendation G. 711
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United States of America Patent
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Issued Date -
Jan 27, 2011
app pub date -
Dec 24, 2007
filing date -
Jun 14, 2007
priority date (Note) -
Abandoned
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Abstract
A device and method for resynchronization and recovery after frame erasure concealment of an encoded sound signal comprise decoding, in a current frame, a correctly received signal after the frame erasure. Frame erasure concealment is extended in the current frame using an erasure-concealed signal from a previous frame to produce an extended erasure-concealed signal. The extended erasure-concealed signal is correlated with the decoded signal in the current frame and the extended erasure-concealed signal is synchronized with the decoded signal in response to the correlation. A smooth transition is produced in the current frame from the synchronized extended erasure-concealed signal to the decoded signal.
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