Multi-Lambda Search for Improved Rate-Distortion Optimization of H.265/HEVC

被引：0
|
作者：
Im, Sio-Kei [1 ]
Chan, Ka-Hou [1 ]
机构：
[1] Macao Polytech Inst, MPI QMUL Informat Syst Res Ctr, Macau, Peoples R China
来源：
2015 10TH INTERNATIONAL CONFERENCE ON INFORMATION, COMMUNICATIONS AND SIGNAL PROCESSING (ICICS) | 2015年
关键词：
Lagrange multiplier; Quantization Parameter; Rate-Distortion Optimization; Multi-Lambda; LAGRANGE MULTIPLIER; MOTION ESTIMATION; VIDEO;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Lagrangian Rate Distortion Optimization (RDO) is widely employed in modern video encoders such as H.265/HEVC for mode decision. For each encoding stage, this approach involves minimizing a cost, which is a function of rate, distortion and a multiplier called lambda. This paper explores multi-lambda search and its impact on RDO by using more than one value of lambda. Simulations show an average bit rate saving up to 13.0% can be achieved for the H.265/HEVC codec. Moreover, the extra added complexity is contained to a certain level and is also adjustable according the processing resources available.
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页数：5
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