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Short Distance Intra Coding Scheme for High Efficiency Video Coding. Xiaoran Cao, Changcai Lai, Yunfei Wang, Lingzhi Liu , Jianhua Zheng , and Yun He, Senior Member, IEEE. IEEE Transaction on Image Processing, Vol. 22, No. 2, February 2013. Pete Liu. Outline. Overview - PowerPoint PPT Presentation
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SHORT DISTANCE INTRA CODING SCHEME FOR HIGH EFFICIENCY VIDEO CODING
IEEE Transaction on Image Processing,
Vol. 22, No. 2, February 2013
Xiaoran Cao, Changcai Lai, Yunfei Wang, Lingzhi Liu, Jianhua Zheng, and Yun He, Senior Member, IEEE
Pete Liu
2
OUTLINE
Overview Introduction Analysis of directional prediction Proposed methods Experimental results Conclusion
3
OVERVIEW
The goal of this paper Bitrate reducing PSNR gain
However, the complexity will be quite high. Double time in encoding.
7
ANALYSIS OF DIRECTIONAL PREDICTION #1
Image correlation model [25] 123
Prediction error residual
123
9
ANALYSIS OF DIRECTIONAL PREDICTION #3
When 123
And the variance of eij can be derived directly 123
10
ANALYSIS OF DIRECTIONAL PREDICTION #4
There are three conditions
123
123
123
If = 0.95
0.72
0.45
0.29
11
ANALYSIS OF DIRECTIONAL PREDICTION #5
It is necessary to consider the transform process. 123
123
We obtain MSE
123
16
PROPOSED METHODS #4
Intra Prediction of Nonsquare Unit 2(M+N)+1 pixels are needed Main two stages
Do intra prediction with Hadamard transform replacing DCT and entropy coding is skip. The RD cost is calculated by SAD of the transformed block and the bits for coding the intra prediction mode. The modes with smaller RD costs are selected into a candidate list.
Full RDO process is carried out to the candidate list.