... key video compression standards:H.261, H.263, MPEG 1, MPEG 2, and MPEG 4. 55. 2 Motion Compensated Video CodingVirtually all video compression systems identify and reduce four basic types of video ... characteristicsandfunctionalitiessupportedbyexisting standards. Sections55.4.2, 55. 4.3, and 55. 4.5 outline the Motion Picture Experts Group (MPEG) standards for video compres-sion. Sections 55. 4.1 and 55. 4.4 review the CCITT H.261 and ... demonstration of the quality tradeoff inherent to rate-scalable video compression, Fig. 55. 11 shows frame 210 of the Ping-pong video sequence, decompressed at bit rates of 1.5Mbits/s, 300 kbits/s,...