
FOLLOWUS
1.Department of Communication Engineering, Xiamen University, Xiamen 361005, China
2.Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
[ "Yi-xiong ZHANG, E-mail: zyx@xmu.edu.cn" ]
收稿:2011-07-27,
修回:2011-12-;8,
纸质出版:2012-01
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Video coding using geometry based block partitioning and reordering discrete cosine transform[J]. 信息与电子工程前沿(英文), 2012,13(1):71-82.
Yi-xiong ZHANG, Jiang-hong SHI, Wei-dong WANG. Video coding using geometry based block partitioning and reordering discrete cosine transform[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(1): 71-82.
Video coding using geometry based block partitioning and reordering discrete cosine transform[J]. 信息与电子工程前沿(英文), 2012,13(1):71-82. DOI: 10.1631/jzus.C1100218.
Yi-xiong ZHANG, Jiang-hong SHI, Wei-dong WANG. Video coding using geometry based block partitioning and reordering discrete cosine transform[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(1): 71-82. DOI: 10.1631/jzus.C1100218.
Geometry based block partitioning (GBP) has been shown to achieve better performance than the tree structure based block partitioning (TSBP) of H.264. However
the residual blocks of GBP mode after motion compensation still present some non-vertical/non-horizontal orientations
and the conventional discrete cosine transform (DCT) may generate many high-frequency coefficients. To solve this problem
in this paper we propose a video coding approach by using GBP and reordering DCT (RDCT) techniques. In the proposed approach
GBP is first applied to partition the macroblocks. Then
before performing DCT
a reordering operation is used to adjust the pixel positions of the residual macroblocks based on the partition information. In this way
the partition information of GBP can be used to represent the reordering information of RDCT
and the bitrate can be reduced. Experimental results show that
compared to H.264/AVC
the proposed method achieves on average 6.38% and 5.69% bitrate reductions at low and high bitrates
respectively.
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