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Real-time videoconferencing using cellular devices provides natural communication to the Deaf community. For this application, compressed American Sign Language (ASL) video must be evaluated in terms of the intelligibility of the conversation and not in terms of the overall aesthetic quality of the video. This work conducts an experiment to determine the subjective preferences of ASL users in terms...
With the rapid development of video communications between heterogeneous networks and video surveillance services, scalable video coding (SVC) technology is proposed to solve the fluctuation of network bandwidth and become the current research focus. Because bit error rate in wireless channel is very high, and it is the serious impact for video quality, the error concealment algorithm research of...
To efficiently transmit H.264/AVC coded video over error prone channel, an end-to-end rate distortion optimized motion estimation is proposed. The end-to-end pixel level distortion of transmitted frame is estimated at the encoder, and then the distortion of reference frame area is weighted and combined with the conventional Lagrangian cost of motion estimation to form an enhanced cost function. By...
Scalability in video coding is becoming the primary choice for providing quality of service (QoS) guarantees in wireless video communication. In this paper, we develop real-time rate and distortion prediction models for medium grained scalable (MGS) coded video streams. These models allow mobile video encoders to predict the packet size and corresponding distortion of a video frame using only the...
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