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2 September 2009Design considerations for computationally constrained two-way real-time video communication
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.
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Lazar M. Bivolarski, Steven E. Saunders, 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);