Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
James William McGowan0
Minkyu Lee0
Date of Patent
August 12, 2008
0Patent Application Number
103941180
Date Filed
March 21, 2003
0Patent Primary Examiner
Patent abstract
A low complexity packet loss concealment method for use in voice-over-IP speech transmission calculates a cross-correlation of previous speech data to estimate the pitch period of the previous speech when speech frames have been lost. A tap interval used to calculate the cross-correlation is dynamically adapted, thereby reducing the computational complexity of the process. In addition, the pitch period estimation is bypassed completely when it is determined not to be necessary, as a result of the speech being unvoiced or silence. A waveform “bending” operation is performed into the current frame without inserting any algorithmic delay into each frame.
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