FLEXIBLE P-PICTURE (FLEXP) CODING FOR THE EFFICIENT FINE-GRAULAR SCALABILITY (FGS) (TP-P3)

Author(s) : You Zhou (University of Science & Technology of Beijing, China) Xiaoyan Sun (Microsoft Research Asia, China) Feng Wu (Microsoft Research Asia, China) Hong Bao (University of Science & Technology of Beijing, China) Shipeng Li (Microsoft Research Asia, China)

Abstract : This paper proposes a flexible P-picture (FlexP) coding technique, where P-pictures are selectively used as refer-ences for other pictures. For a given reference bit-rate, the proposed FlexP technique can improve the quality of ref-erences by allocating more bits to the selected P-pictures and reducing the number of non-selected P-pictures. Or, given the bits for each selected P-picture are fixed, the proposed technique is able to reduce the reference bit-rate by selecting fewer P-pictures as references, thus reducing drifting error at low bit-rates. The proposed FlexP tech-nique flexibly utilizes the available channel bandwidth to achieve a good trade-off between high coding efficiency and low drifting error at the enhancement layer especially when the R-D rate allocation is enabled. The experimental results show that the fine-granular scalable video coding with the proposed technique can gain more than 1.0dB.

Menu