Transmission system for compressed information has been studied for the purpose of efficient transmission for multimedia information. If part of the compressed image information are erred on transmission, sometimes played video will suffer great influence. Our study quantify analyzed influence that error bit cause obstacle for played video on MPEG. Then we will add adaptive value to every bit based on quantification. Therefore we will develop transmission system with good quality video on same error rate. In this paper, we seek significant bit to decline video quality using S/N which source video is compared with played video that turned at only one bit from MPEG bit stream. And we materialized to quantify MPEG bits.