Layered transmission of audio/video signals

Masoud Sajadieh; F. R. Kschischang; Alberto Leon-Garcia

doi:10.1117/12.233207

27 February 1996 Layered transmission of audio/video signals

Masoud Sajadieh, F. R. Kschischang, Alberto Leon-Garcia

Proceedings Volume 2727, Visual Communications and Image Processing '96; (1996) https://doi.org/10.1117/12.233207
Event: Visual Communications and Image Processing '96, 1996, Orlando, FL, United States

Abstract

In a broadcast channel, a single transmitter communicates with a number of receivers having different channel capacities available to them. A typical example of such a channel is the over the air TV broadcast. For the two-receiver case, we examine the performance of some common orthogonal transmission methods in terms of their achievable rates. Layered transmission, whereby the information intended for the better channel is superimposed on the portion of information common to both receivers, can provide an optimal solution. On this premise, we construct a bi-rate transmission model for a Gaussian broadcast channel, in which receivers are distributed according to an exponential pdf. A basic grade of service is thus maintained throughout the entire coverage area in addition to a higher quality video offered to the receivers with better reception conditions. The performance evaluation indicates that this model offers a higher per capita data rate comparing to the conventional single rate transmission systems. The multirate paradigm exhibits a stepwise degradation, mitigating the sharp cutoff threshold of the current digital broadcast systems. Application of this multirate broadcast proves very promising in the area of multiresolution transmission of digital HDTV.

Citation Download Citation

Masoud Sajadieh, F. R. Kschischang, and Alberto Leon-Garcia "Layered transmission of audio/video signals", Proc. SPIE 2727, Visual Communications and Image Processing '96, (27 February 1996); https://doi.org/10.1117/12.233207

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KEYWORDS

Receivers

Transmitters

Clouds

Interference (communication)

Data modeling

Satellites

Signal to noise ratio

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