DATA TRANSMITTER, DATA RECEIVER, DATA COMMUNICATION EQUIPMENT AND DATA COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To reflect changes in a transmission band on communication control even under a condition that the transmission band changes dynamically by controlling an encoding processing and/or a transmission processing based on control information to be informed from a transmission destination. SOLUTION: Transmission is performed by inserting a test packet with size different from an encoding packet into a group of the encoding packets to be transmitted by an information transmitter 101 at a transmission side and the transmission band S is estimated by utilizing difference in two kinds of packet size by an information receiver at a reception side. And information to estimate the transmission band is informed to the information transmitter 101 by the information receiver 102 by which the transmission band S is estimated. Thus, quality of the information to be transmitted and quantity of codes are properly controlled and a load of a communication network is normalized without falling into a congested state even when the transmission band S dynamically changes by the information transmitter 101. Thus, stable quality is maintained even when real time continuous information like a video signal and an audio signal is transmitted.