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Performance evaluation of a dynamic video resolution control scheme in media-synchronized video and audio communications

This paper studies a congestion control scheme in integrated variable bit-rate (VBR) video, audio and data (e.g., image or text) communications, where each video stream is synchronized with the corresponding audio stream. When the audio and-video streams are output, media-synchronization control is performed. To avoid congestion, we employ a dynamic video resolution control scheme which dynamically changes the video encoding rate according to the network loads. By simulation, the paper evaluates the performance of the scheme in terms of throughput, loss rate, average delay, and mean square error of synchronization. Numerical results show the effectiveness of the scheme.