| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To generate a concealment signal which hardly deteriorates in sound quality for audio signal transmission of VoIP etc. <P>SOLUTION: If an audio transmission signal is lost, a repetitive section calculating unit 14 sets a plurality of repetitive sections which are decided as sections similar to an audio transmission signal right before the loss, and differ in length for an audio transmission signal having stationary among audio transmission signals which are inputted in the past and saved in a normal signal storage unit 11, and a control unit 15 generates the concealment signal by using audio transmission signals in the set repetitive sections. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
