Video TFRC

TCP-Friendly Rate Control (TFRC) is a congestion control technique that trade-offs responsiveness to the network conditions for a smoother throughput variation. The authors take advantage of this trade-off by calculating the rate gap between the theoretical TCP throughput and the smoothed TFRC throughput. Any rate gain from this rate gap is then opportunistically used for video coding. They define a frame complexity measure to determine the additional rate to be used from the rate gap and then perform a rate negotiation to determine the target rate for the encoder and the final sending rate.