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2001
IEEE

Prescient mode selection for robust video coding

9 years 5 months ago
Prescient mode selection for robust video coding
In standard predictive video coders, intra-mode coding of macroblocks (MBs) provides packet loss resilience, at the cost of reduced compression efficiency. Conventional mode selection algorithms are "greedy" as they focus on minimization of distortion of current MB, while ignoring the effect of this selection on subsequent frames. This paper proposes an algorithm for prescient mode selection: the coding modes of MBs are chosen while taking into account the distortion of subsequent frames. The problem is formulated as one of joint selection of MB coding modes, for a group of pictures, so as to minimize the rate-distortion cost. The straightforward solution based on dynamic programming requires enormous computational complexity. We propose an iterative algorithm which obtains a locally optimal solution at feasible complexity. The total decoder distortion is computed using recursive optimal per-pixel estimate (ROPE) which accurately accounts for the effects of quantization, pac...
Rui Zhang, Shankar L. Regunathan, Kenneth Rose
Added 25 Oct 2009
Updated 25 Oct 2009
Type Conference
Year 2001
Where ICIP
Authors Rui Zhang, Shankar L. Regunathan, Kenneth Rose
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