Analysis of joint bit-rate control in multiprogram image coding

Gertjan Keesman; David Elias

doi:10.1117/12.185947

16 September 1994 Analysis of joint bit-rate control in multiprogram image coding

Gertjan Keesman, David Elias

Proceedings Volume 2308, Visual Communications and Image Processing '94; (1994) https://doi.org/10.1117/12.185947
Event: Visual Communications and Image Processing '94, 1994, Chicago, IL, United States

Abstract

Variable bit-rate compression is known to be more efficient than constant bit-rate (CBR) compression. However, since most transmission media convey a constant bit-rate, most applications use CBR compression. In multi-program applications such as satellite and cable television a technique called joint bit-rate control can be used. With joint bit-rate control the bit rates of individual programs are allows to vary but the sum of all bit rates is kept constant. Since a joint control is involved, the encoders should be geographically close. Joint bit-rate control is considered to be different from a technique called statistical multiplexing which is proposed in combination with ATM networks. In this paper, the benefits of joint bit-rate control are studied. This study involves both a theoretical analysis and a verification with experiments. Both theory and practice indicate that joint bit-rate control gives a significant gain even for a small number of programs. For instance, extra programs can be transmitted over the same channel if joint bit-rate control is used.

Citation Download Citation

Gertjan Keesman and David Elias "Analysis of joint bit-rate control in multiprogram image coding", Proc. SPIE 2308, Visual Communications and Image Processing '94, (16 September 1994); https://doi.org/10.1117/12.185947

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