Statistical real-time video channels over a multiaccess network

Chih-Che Chou; Kang G. Shin

doi:10.1117/12.171688

1 April 1994 Statistical real-time video channels over a multiaccess network

Chih-Che Chou, Kang G. Shin

Proceedings Volume 2188, High-Speed Networking and Multimedia Computing; (1994) https://doi.org/10.1117/12.171688
Event: IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, 1994, San Jose, CA, United States

Abstract

Video frames are usually compressed before their transmission through a network. Due to this compression, some frames will be more important than others when the images are reconstructed at the receiver node, i.e., frames are not independent of one another. Although it is desirable to keep the miss rate of these important frames as low as possible, it is not always appropriate to give them higher priority than other real-time traffic since the performance guarantees of real-time channels could otherwise be compromised. We propose a scheme which can provide performance guarantees to all real-time traffic and also improve the overall frame reconstruction rate without compromising the performance guarantees of inter- dependent video frame streams. Basically, we use a statistical real-time channel to deliver each video stream and dynamically extend the due data of a frame as long as the frame is still useful after its previously-assigned due date. Channels originating from the same source node are multiplexed so that the overall network utilization can be improved. We have simulated the proposed scheme using MPEG-coded frames of the movie Star Wars and the scheme is shown to be able to effectively improve the overall frame reconstruction rate, successfully reduce the link capacity necessary for an MPEG channel to an average level from the worst-case level needed for a channel of the same quality without channel multiplexing, and at the same time provide performance guarantees.

Citation Download Citation

Chih-Che Chou and Kang G. Shin "Statistical real-time video channels over a multiaccess network", Proc. SPIE 2188, High-Speed Networking and Multimedia Computing, (1 April 1994); https://doi.org/10.1117/12.171688

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