FEEDBACK QUALITY CONTROL METHOD IN TWO-WAY VIDEO COMMUNICATION SYSTEM, TERMINAL, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a two-way video communication system capable of continuing a service with proper quality.;SOLUTION: Transmission setting sections 11, 13 set one parameter or more among a transmission bit rate, a transmission frame rate and a transmission packet size or the like. A quality monitor section 21 monitors one parameter or more among a reception bit rate, a reception frame rate, and a reception packet size or the like. A quality monitor section 14 transmits a probe to a packet transfer apparatus 4 or a receiver side terminal 2 and calculates one or more among a network band, a packet loss rate, and a packet response time depending on the response. A quality monitor section 31 calculates one or more among a network band, a packet loss rate, and a packet response time on a path on which a video is transferred. A threshold value discrimination section 15 executes second setting of a transmission parameter to the transmission setting section 11 when the monitor information in one or more of the quality monitor sections 13, 21, 14 and 31 exceeds a preset permissible variation value.;COPYRIGHT: (C)2005,JPO&NCIPI