Adaptive foveation of MPEG video
MULTIMEDIA '96 Proceedings of the fourth ACM international conference on Multimedia
MULTIMEDIA '96 Proceedings of the fourth ACM international conference on Multimedia
Video transcoder architectures for bit rate scaling of H.263 bit streams
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 1)
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VISUAL '02 Proceedings of the 5th International Conference on Recent Advances in Visual Information Systems
Optimal Dynamic Rate Shaping for Compressed Video Streaming
ICN '01 Proceedings of the First International Conference on Networking-Part 2
A Foveation-Based Rate Shaping Mechanism for MPEG Videos
PCM '02 Proceedings of the Third IEEE Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
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Proceedings of the 13th annual ACM international conference on Multimedia
Rate-accuracy tradeoff in automated, distributed video surveillance systems
MULTIMEDIA '06 Proceedings of the 14th annual ACM international conference on Multimedia
EURASIP Journal on Applied Signal Processing
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Multimedia Tools and Applications
A fast MPEG-2 to H.264 downscaling transcoder
ISCGAV'08 Proceedings of the 8th conference on Signal processing, computational geometry and artificial vision
Model-based transrating of H.264 coded video
IEEE Transactions on Circuits and Systems for Video Technology
Motion information exploitation in H.264 frame skipping transcoding
ACIVS'07 Proceedings of the 9th international conference on Advanced concepts for intelligent vision systems
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Image Communication
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ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
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Journal of Mobile Multimedia
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Proceedings of the 4th ACM Multimedia Systems Conference
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We introduce the concept of dynamic rate shaping, a technique to adapt the rate of compressed video bitstreams (MPEG-1, MPEG-2, H.261, as well as JPEG) to dynamically varying bit rate constraints. The approach provides an interface (or filter) between the encoder and the network, with which the encoder's output can be perfectly matched to the network's quality of service characteristics. Since the presented algorithms do not require interaction with the encoder, they are fully applicable to precoded, stored video (e.g., video-on-demand systems). By decoupling the encoder and the network, universal interoperability can be achieved. In essence, DRS bridges the gap between CBR and VBR video, allowing a continuum of possibilities between the two. A set of low-complexity algorithms for so-called unconstrained dynamic rate shaping are presented, and both optimal and extremely fast designs are discussed. Experimental results are provided using actual MPEG-2 bitstreams.