DATA COMMUNICATION SYSTEM, DATA TRANSMITTING APPARATUS, DATA TRANSMITTING METHOD, AND METHOD FOR DETERMINING PACKET SIZE AND REDUNDANCY

摘要

A data communication system, a data transmission device, a data transmission method, and a method for determining a packet size and redundancy are provided to obtain sufficient resistance to a burst loss without increasing delay even at a low data rate. A packetizing unit(112) packetizes transmission data to generate data packets. An FEC(Forward Error Correction) encoding unit(113) performs redundant encoding on the generated data packets at every certain time unit to generate encoded blocks. An RTP(Real time Transport Protocol) transmission unit(114) transmits the encoded blocks to a data receiving apparatus. An encoder(111) acquires a data size of the transmission data at every certain time unit. A packet-size determining unit(116) determines a packet size of each data packet generated by the packetizing unit based on the data size acquired by the encoder at every certain time.