Temporal-Layer-Motivated Lambda Domain Picture Level Rate Control for Random-Access Configuration in H.265/HEVC

• Published in: IEEE transactions on circuits and systems for video technology 2019-01, Vol.29 (1), p.156-170
• Main Authors: Gong, Yanchao, Wan, Shuai, Yang, Kaifang, Wu, Hong Ren, Liu, Ying
• Format: Article
• Language: English
• Subjects: Access control; Algorithms; Bandwidths; Coding; Coding standards; Configurations; Data compression; H.265/HEVC; High efficiency video coding; Image motion analysis; Image sequences; Model testing; Pictures; Random-access configuration; rate control; Rate distortion theory; temporal-layer-motivated; Time lag; Variation; video coding; Video communication; Video compression; Video transmission
• ISSN: 1051-8215; 1558-2205
• DOI: 10.1109/TCSVT.2017.2769703

Rate control is a key technique for video communication systems. The aim of rate control is to transmit the best possible quality video sequences under various restrictions, such as channel bandwidth, buffer capacity, maximum time delay allowed for a given service, and so on. The λ domain rate control technique (λ-RC) has been integrated into the latest High Efficiency Video Coding standard (H.265/HEVC) test model, due to its accurate bit estimation and high rate-distortion performance. However, it is found that the λ-RC is not the optimal choice under the random-access configuration. When the random-access configuration is used, pictures are organized into temporal layers, where pictures in different layers are of different importance in terms of prediction. In this paper, a picture level lambda domain rate control technique for the randomaccess configuration in H.265/HEVC is proposed. The influence of temporal layers is effectively considered in the proposed algorithm referred to as TL-λ-PRC. Experimental results verify that the proposed TL-λ-PRC is efficient in coding performance and accurate in bit estimation. Compared with the λ-RC with the fixed ration bit allocation which has been implemented in the test model of H.265/HEVC (HM 14.0), TL-λ-PRC achieves an average reduction of 4.10% and 3.49% for slow motion and fast motion sequences, respectively, in BD-rate (Bjøntegaard-Delta bitrate) with more accurate bit estimation. The performance of different algorithms in terms of algorithm complexity and quality fluctuation are also carefully analyzed in this contribution.