Information processing system, information processing apparatus, and program

摘要

The purpose of the present invention is to change a bit rate in accordance with occurrence of communication congestion upon receipt of distributed data and an increase in a packet loss rate. An information terminal (10) sequentially receives a plurality of packets constituting distributed data from an information distribution server (20). When congestion is determined to have occurred in communication with the information distribution server (20) on the basis of a change in a time interval from transmission to reception for each of the sequentially received packets, and when the packet loss rate, which is a ratio of the lost packets to the packets transmitted from the information distribution server (20) and which is calculated on the basis of the sequentially received packets, is determined to have increased above a value obtained by multiplying the packet loss rate prior to receiving the packets constituting the distributed data by a predetermined weight, the information terminal (10) requests that the information distribution server (20) change the bit rate of the packets constituting the distributed data.