PSNR Evaluation of Media Traffic Over TFRC

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Executive Summary

Due to the remarkable increase in media traffic over the existing best-effort IP Internet, the Internet congestion state is expected to worsen. TCP-friendly rate control protocol TFRC is one of the most promising congestion control techniques developed so far. Those techniques have been thoroughly tested in terms of being TCP-friendly and fair. Yet, their impact on the visual quality of the media traffic traversing Internet is still questionable. This paper investigates, in a simulated environment, the effect of incorporating TFRC on the peak signal-to-noise ratio PSNR of the transmitted video over Internet. A number of arbitrary raw videos are encoded, converted into trace files via a known tool-set, and then pushed into a simulated network environment to run over TFRC protocol with coexisting TCP flows.

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