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- Title
A frame-level encoder rate control scheme for transform domain Wyner-Ziv video coding.
- Authors
Chen, Jian; Zheng, Shuai; Hu, Qing; Kuo, Yonghong
- Abstract
Available distributed video coding codecs are mostly based on decoder rate control scheme where the parity bits for decoding can be achieved over a feedback channel. Meanwhile, the frequent requests over feedback channel increase the transmission delay. The feedback-free distributed video coding, relying on encoder rate control in literatures, has overcome the aforementioned shortcoming. However, when performing parity bitrate estimation and other operations, the feedback-free distributed video coding systems based on bit-plane usually require high precision of bitrate estimation and high quality of side information at the encoder. In this paper, we propose a frame-level distributed video coding system based on encoder rate control. The innovations include three parts: 1) an adaptive coding mode selection algorithm is proposed, which utilizes both temporal and spatial correlation and reduces the complexity of encoder; 2) a bit-plane rearrangement method is adopted, which makes the coding rate on each bit-plane homogeneous and effectively reduces the accuracy requirement of the parity bitrate prediction and improves the efficiency of rate estimation; 3) a frame-level parity bitrate estimation scheme is presented to enhance the efficiency of rate estimation on the basis of a look-up table. Numerical results verify that the proposed scheme remarkably improves the rate distortion performance of distributed video coding at low bitrate.
- Subjects
VIDEO coding; VIDEO codecs; DECODING algorithms; ADAPTIVE codes; CODING theory
- Publication
Multimedia Tools & Applications, 2017, Vol 76, Issue 20, p20567
- ISSN
1380-7501
- Publication type
Article
- DOI
10.1007/s11042-016-3992-z