Realtime Video Transmission over a Fast Packet-Switched Network

Robert J. Moorhead; Joong S. Ma; Cesar A. Gonzales

doi:10.1117/12.952635

5 April 1989 Realtime Video Transmission over a Fast Packet-Switched Network

Robert J. Moorhead, Joong S. Ma, Cesar A. Gonzales

Proceedings Volume 1075, Digital Image Processing Applications; (1989) https://doi.org/10.1117/12.952635
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Realtime transmission of packetized video is a relatively new but important area of research since tomorrow's networks will likely be based on a common fast packet-switching technology, replacing today's heterogeneous networks which are mixtures of circuit-switched and packet-switched networks dedicated for synchronous and asynchronous applications respectively. Unlike fixed bandwidth transmission channels, packet-switched networks can accommodate the bursty and highly variable rate of compressed motion video yet keep a constant level of image quality. Potential applications include motion video databases, video teleconferencing, and broadcasting over private networks. Unfortunately, traditional video-compression techniques which are applicable to synchronous, fixed bandwidth channels--cannot be applied in this new environment without substantial revisions that take into account the statistical nature of packet data transmission. Independent of their topology, fast packet-switched networks present unique challenges to the coding of motion video; one cannot simply divorce the coding of the source from the characteristics of the channel. The potential for loss of data integrity due to packet losses and transmission errors must be taken into account. The problem of re-synchronization must also be addressed since packet-switched networks are asynchronous by nature. In this paper, we evaluate image coding techniques for motion video in view of the constraints imposed by the packetized medium.

Citation Download Citation

Robert J. Moorhead, Joong S. Ma, and Cesar A. Gonzales "Realtime Video Transmission over a Fast Packet-Switched Network", Proc. SPIE 1075, Digital Image Processing Applications, (5 April 1989); https://doi.org/10.1117/12.952635

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