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2 September 2009 Design considerations for computationally constrained two-way real-time video communication
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Today's video codecs have evolved primarily to meet the requirements of the motion picture and broadcast industries, where high‐complexity studio encoding can be utilized to create highly‐compressed master copies that are then broadcast one‐way for playback using less‐expensive, lower‐complexity consumer devices for decoding and playback. Related standards activities have largely ignored the computational complexity and bandwidth constraints of wireless or Internet based real‐time video communications using devices such as cell phones or webcams. Telecommunications industry efforts to develop and standardize video codecs for applications such as video telephony and video conferencing have not yielded image size, quality, and frame‐rate performance that match today's consumer expectations and market requirements for Internet and mobile video services. This paper reviews the constraints and the corresponding video codec requirements imposed by real-time, 2-way mobile video applications. Several promising elements of a new mobile video codec architecture are identified, and more comprehensive computational complexity metrics and video quality metrics are proposed in order to support the design, testing, and standardization of these new mobile video codecs.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lazar M. Bivolarski, Steven E. Saunders, and John D. Ralston "Design considerations for computationally constrained two-way real-time video communication", Proc. SPIE 7443, Applications of Digital Image Processing XXXII, 74430I (2 September 2009);


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