PROJECT TITLE :
Distributed Video Coding With Feedback Channel Constraints
Several of the distributed video coding (DVC) systems described in the literature create use of a feedback channel from the decoder to the encoder to determine the rate. However, the number of requests through the feedback channel is usually high, and consequently the general delay of the system may be unacceptable in sensible applications. As a answer, feedback-free DVC systems have been proposed, however the problem with these solutions is that they incorporate a tough trade-off between encoder complexity and compression performance. Recognizing that a restricted form of feedback could be supported in several video-streaming scenarios, in this paper we have a tendency to propose a method for constraining the amount of feedback requests to a fixed most number of $N$ requests for an entire Wyner-Ziv (WZ) frame. The proposed technique estimates the WZ rate at the decoder using data obtained from previously decoded WZ frames and defines the $N$ requests by minimizing the expected rate overhead. Tests on eight sequences show that the speed penalty is less than 5p.c when only 5 requests are allowed per WZ frame (for a group of pictures of size four). Furthermore, because of enhancements from previous work, the system is able to perform higher than or almost like DISCOVER even when up to 2 requests per WZ frame are allowed. The sensible usefulness of the proposed approach is studied by estimating finish-to-finish delay and encoder buffer necessities, indicating that DVC with constrained feedback can be an necessary answer within the context of video-streaming situations.
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