Abstract
Wireless access to continuous-media services such as video, voice, and audio is becoming increasingly prevalent. Interactive video services such as video conferencing and multimedia editing are two such services of particular interest. We discuss some of the problems with using the MPEG standard (which was designed for wired, circuit-switched services) for wireless packet-video transport in a mobile environment. We propose a novel strategy for video transport using a layered source coder in conjunction with a variable QOS, multiple-substream abstraction for the transport. This abstraction addresses specifically the need to obtain simultaneously high spectral efficiency, good subjective quality, and low perceptual delay on a wireless channel. It also addresses the heterogeneous transport resulting from the concatenation of a wireless access link with a broad-band backbone network.
We use asynchronous video (ASV) reconstruction, running counter to current techniques, which use strictly synchronous (frame-by-frame) video processing. By doing so, we hope to achieve a perceptual delay that is much lower than the worst-case transport delay. By perceptual delay, we refer to the effective end-to-end latency observed by the user, for example as represented by the audio delay required to maintain lip synchronization. By identifying packets to the transport with relaxed reliability and/or delay requirements, the transport (particularly wireless) can achieve high traffic capacity. Reasonable and promising simulation results are achieved, although much work remains on achieving significant video compression in this environment.
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References
Haskell, P., Messerschmitt, D.G., “ A Signal Processing Perspective on Networking for Continuous-Media Services”, submitted to IEEE/ACM Transactions on Networking, November 1994.
Kleinrock, L., Queuing Systems, Vol II, J. Wiley, 1976.
Yun, L.C., Messerschmitt, D.G., “Variable quality of service in CDMA systems by statistical power control”, Proc. IEEE International Comm. Conf., June 18–21, 1995, Seattle, WA, vol. 2, pp. 713–719.
Gilhousen, K.S. et al, “On the capacity of a cellular CDMA system”, IEEE Trans. Vehicular Tech., (40):2, pp. 303–312, May 1991.
Proakis, J.G., Digital Communications, 3rd ed., McGraw-Hill, 1995.
Lee, E.A., Messerschmitt, D.G., Digital Communication, Second Edition, Boston: Kluwer Academic Press, 1993.
Natvig, J.E., Hansen, S., de Brito, J., “Speech processing in the pan-European digital mobile radio system”, Proc. GLOBECOM, Dallas, TX, USA, Nov. 27–30, 1989.
Lao, A.Y., Reason, J.M., Messerschmitt, D.G., “Asynchronous Video Coding for Wireless Transport”, IEEE Workshop on Mobile Computing and Applications, December 1994.
Yun, L.C., Transport for Multimedia on Wireless Networks, Ph.D. dissertation, in preparation.
Lin, S., Costello, D.J., Jr., Miller, M.J., “Automatic-repeat-request error-control schemes”, IEEE Communications Magazine, vol.22,no.12, pp.5–17, December 1994.
Lei, S., “Forward error correction codes for MPEG2 over ATM”, IEEE Trans, on Cir. and Sys. for Video Tech., vol. 4,no. 2, April 1994.
Montreuil, L., “Performance of coded QPSK modulation for the delivery of MPEG2 stream compared to analog FM modulation”, 1993.
Steele, R., Mobile Radio Communications, 1st ed., IEEE Press, 1992.
ISO/IEC/JTC1/SC29/WG11 Systems Committee, “MPEG-2 systems working draft”, July 1993.
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Reason, J.M., Yun, L.C., Lao, A.Y., Messerschmitt, D.G. (1995). Asynchronous Video: Coordinated Video Coding and Transport for Heterogeneous Networks with Wireless Access. In: Imielinski, T., Korth, H.F. (eds) Mobile Computing. The Kluwer International Series in Engineering and Computer Science, vol 353. Springer, Boston, MA. https://doi.org/10.1007/978-0-585-29603-6_10
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DOI: https://doi.org/10.1007/978-0-585-29603-6_10
Publisher Name: Springer, Boston, MA
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