Patent ID: 8149884

Claim:
A communication apparatus that receives, via a packet network, a packet transmitted by a transmission side, the apparatus comprising: a jitter buffer in which after the packet received is written, the packet being is read; and a control unit that obtains an inter-packet jitter based on difference information between time stamp information at the time of reception of the packet and another time stamp information attached to the packet at the time of transmission of the packet by the transmission side, with regard to at least one of a plurality of the received packets, and that performs control to change a reference frequency in accordance with the inter-packet jitter to transmit the packet from the jitter buffer based on a changed transmission frequency, wherein the control unit takes, as the transmission frequency, a frequency obtained by multiplying, by the reference frequency, a value obtained by dividing a transmission interval of packets read from the jitter buffer, by a value obtained by adding the inter-packet jitter to the transmission interval of the packets.