A video communication system having: an encoder coding input video data and outputting a video stream; and a packet processing part grouping into packets the output video stream from said encoder and outputting the same to a communication path; wherein said packet processing part generates an original data cluster consolidating a packet for each group of a prescribed number of MB processes and redundant data for correcting data errors of said original data cluster; and controls the insertion quantity of redundant data so that the combined number of bits of said original data cluster and said redundant data works out to be equal to or less than the target number of bits.