| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce sound distortion or sound skipping when an allowable storage amount of jitter absorption buffer increased at the time of communication network congestion is returned to a default value after the communication network congestion is recovered. <P>SOLUTION: A transmission side device 1 comprises: a silent state information generating unit 11 which generates silent state information in accordance with a volume level of voice data; a voice packet generating unit 12 which adds the silent state information to packetize the voice data; a packet delivering unit 13 which transmits a packet to a reception side device 3. The reception side device 3 comprises: a packet receiving unit 31 which receives the packet to acquire the voice data and the silent state information; a jitter absorption buffer 33 which stores the voice data to adjust a delay time; and a jitter buffer adjusting unit 32 which, when a storage amount exceeds a specified allowable storage amount, increases the allowable storage amount and, when the storage amount is within a specified allowable storage amount for a certain time, discards the voice data indicating a silent state and returns the allowable storage amount back to a default value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
