Patent ID: 8155035

Claim:
A reception apparatus for receiving packets successively transmitted from a transmission apparatus, comprising: a detection unit configured to detect loss of a packet; a registration unit configured to register packet information including identification information for identification of the packet with which the loss occurs into a retransmission request list; a retransmission requesting packet production unit configured to produce, when loss of a packet is detected by said detection unit, a retransmission requesting packet for requesting retransmission of the non-arriving packet whose packet information is registered in said retransmission request list; a retransmission requesting packet transmission unit configured to transmit the retransmission requesting packet to said transmission apparatus; a deletion unit configured to delete the packet information of the non-arriving packet which does not arrive in time prior to the reproduction time from said retransmission request list, wherein the packet information further includes a count value for counting a number of times by which loss of the packet is detected by said detection unit, and said retransmission requesting packet production unit produces the retransmission requesting packet for those of the non-arriving packets having the packet information registered in said retransmission request list which have the count values not less than a threshold value; and a setting unit configured to set the threshold value based on a calculated loss interval, which is an interval of time between two consecutively lost packets.