基于SATD的H.265/HEVC拉格朗日因子选择算法

doi:10.11959/j.issn.1000-436x.2017114

Journal on Communications ›› 2017, Vol. 38 ›› Issue (6): 68-74.doi: 10.11959/j.issn.1000-436x.2017114

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Lagrange multiplier selection based on SATD for H.265/HEVC

Wei LI¹,Fan ZHAO¹,Er-hu ZHANG¹,Peng REN²

¹ Faculty of Printing,Packaging and Digital Media Technology,Xian University of Technology,Xi’an 710048,China
² School of Telecommunications Engineering,Xidian University,Xi’an 710071,China

Revised:2017-04-12 Online:2017-06-25 Published:2017-06-30
Supported by:
China Post Doctoral Science Foundation(2017M610644);The National Natural Science Foundation of China(61671376);The National Natural Science Foundation of China(61671374)

Abstract

Abstract:

In order to improve the coding performance of intra rough mode decision,a SATD-based Lagrange multiplier selection algorithm was proposed for H.265/HEVC.The characteristic of Hadamard transform was first analyzed,and following the new Lagrange multiplier calculation approach based on the distortion measurement of SATD was constructed according to the rate-distortion theory.Then combing the principle of discrete cosine transform,the related parameters were obtained by the formula derivation.Experimental results show that the proposed method supports more accurately intra prediction mode decision,and the reconstruction video quality is improved in average while keeping the same bit-rate.

Key words: intra prediction mode decision, Lagrange multiplier, rate-distortion optimization, H.265/HEVC

CLC Number:

TN911.7

Wei LI,Fan ZHAO,Er-hu ZHANG,Peng REN. Lagrange multiplier selection based on SATD for H.265/HEVC[J]. Journal on Communications, 2017, 38(6): 68-74.

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References 13

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帧内预测模式	相应的模式名
0	Planar
1	DC
2,…,34	角度

序列类型	Δbit-rate	ΔPSNR/dB
Class B	?2.55%	0.115
Class C	?2.38%	0.103
Class D	?2.64%	0.124
Class E	?2.93%	0.125
平均	?2.62%	0.116

序列类型	Δbit-rate	ΔPSNR/dB
Class B	?2.72%	0.158
Class C	?2.94%	0.133
Class D	?2.83%	0.146
Class E	?3.36%	0.192
平均	?2.96%	0.157

序列类型	ΔT
Class B	0.82%
Class C	0.65%
Class D	0.33%
Class E	0.48%
平均	0.57%

序列类型	ΔT
Class B	0.84%
Class C	0.69%
Class D	0.41%
Class E	0.42%
平均	0.59%

Lagrange multiplier selection based on SATD for H.265/HEVC

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