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22 November 1999 Content-based MPEG-2 structuring and protection
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Proceedings Volume 3845, Multimedia Systems and Applications II; (1999)
Event: Photonics East '99, 1999, Boston, MA, United States
We address a new error-resilient scheme for broadcast-quality interactive MPEG-2 video streams to be transmitted over lossy packet networks. A new scene-complexity adaptive mechanism, namely Adaptive MPEG-2 Information Structuring and Protection (AMISP) is introduced. AMISP lies on an information structuring scheme which modulates the number of resynchronization points (i.e., slice headers and intra-coded macroblocks) in order to maximize the perceived video quality. The video quality the end-user experiences depends both on the quality of the compressed video before transmission and on the degradation due to packet loss. Therefore, the structuring scheme constantly determines the best compromise between the rate allocated to encoding pure video information and the rate aiming at reducing the sensitivity to packet loss. It is then extended with a Forward Error Correction (FEC) based protection algorithm to become AMISP. AMISP triggers the insertion of FEC packets in the MPEG-2 video packet stream. Finally, it is shown that AMISP outperforms usual MPEG-2 transmission schemes, and offers an acceptable video quality even at loss ratios as high as 10-2. Video quality is estimated using the Moving Picture Quality Metric, which proved to behave consistently with human judgment.
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Pascal Frossard and Olivier Verscheure "Content-based MPEG-2 structuring and protection", Proc. SPIE 3845, Multimedia Systems and Applications II, (22 November 1999);

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