Real-time and rate-distortion optimized video streaming with TCP

  • Authors:
  • Antonios Argyriou

  • Affiliations:
  • School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

  • Venue:
  • Image Communication
  • Year:
  • 2007

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Abstract

In this paper we explore the use of a new rate-distortion metric for optimizing real-time Internet video streaming with the transmission control protocol (TCP). We lay out the groundwork by developing a simple model that characterizes the expected latency for packets send with TCP-Reno. Subsequently, we develop an analytical model of the expected video distortion at the decoder with respect to the expected latency for TCP, the packetization mechanism, and the error-concealment method used at the decoder. Characterizing the duo protocol/channel more accurately, we obtain a better estimate of the expected distortion and the available channel rate. This better knowledge is exploited with the design of a new algorithm for rate-distortion optimized encoding mode selection for video streaming with TCP. Experimental results for real-time video streaming depict improvement in PSNR in the range of 2dB over metrics that do not consider the behavior of the transport protocol.