By Dzung Tien Hoang
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Extra resources for Fast and Efficient Algorithms for Video Compression and Rate Control
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We 6 The CCITT has since changed its name to the International Telecommunication Union ITU-T . 6. 17: Structure of a macroblock. now provide a summary of some key aspects of the standard. 3. Since p 64 is intended for real-time videoconferencing applications, there is a requirement for low encoding delay. This precludes the use of bidirectional predictive motion compensation. Therefore only intraframe coding and forward predictive coding are used, with a predicted block depending only upon the previous frame.
This conclusion is supported by the lack of such anomalies when bit-minimization is used to perform coding control, as with the M2, H2, and RD coders. 11. 1, these plots show that the H1 and H2 coders both reduce the percentage of bits used for coding motion vectors, while increasing the percentage of bits used to code the DCT coe cients. Furthermore, with the H2 coder, which applies bit-minimization to coding control, the number of bits used for coding side information is also reduced. 4 The Miss America sequence in this test suite was obtained from a di erent source than the Miss sequence used in the earlier experiments and has di erent rate-distortion characteristics.
6. 17: Structure of a macroblock. now provide a summary of some key aspects of the standard. 3. Since p 64 is intended for real-time videoconferencing applications, there is a requirement for low encoding delay. This precludes the use of bidirectional predictive motion compensation. Therefore only intraframe coding and forward predictive coding are used, with a predicted block depending only upon the previous frame. The real-time requirement also restricts the complexity of higher-level algorithms, such as motion estimation and rate control.