Perceptual based SAO rate-distortion optimization method with a simplified JND model for H.265/HEVC

Yang, Kaifang; Wan, Shuai; Yan, Gao; Wu, Hong Ren; Feng, Yan

doi:10.1016/j.image.2014.11.005

Cited by 9 publications

(1 citation statement)

References 12 publications

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“…Due to the nature of the block based encoding used in the HEVC coder, the reconstructed image can exhibit some distortions, usually called as block artifacts, that are very annoying for the viewers, especially at lower bitrates. In order to improve the subjective quality of the reconstructed images, deblocking and SAO filters are used [6,25,26]. This helps to improve the subjective quality, but, at the same time, can degrade the objective quality metrics, such as the still commonly used PSNR.…”

Section: Loss Of Quality In the Hevc Encoder -Short Remarksmentioning

confidence: 99%

Analysis of Video Quality Losses in Homogeneous HEVC Video Transcoding

et al. 2019

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The paper presents quantitative analysis of the video quality losses in the homogenous HEVC video transcoder. With the use of HM15.0 reference software and a set of test video sequences, cascaded pixel domain video transcoder (CPDT) concept has been used to gather all the necessary data needed for the analysis. This experiment was done for wide range of source and target bitrates. The essential result of the work is extensive evaluation of CPDT, commonly used as a reference in works on effective video transcoding. Until now no such extensively performed study have been made available in the literature. Quality degradation between transcoded video and the video that would be result of direct compression of the original video at the same bitrate as the transcoded one have been reported. The dependency between quality degradation caused by transcoding and the bitrate changes of the transcoded data stream are clearly presented on graphs. Keywords-video compression; video transcoding; HEVC; H.265; CPDT; cascaded pixel domain video transcoder;Highlights: Deep analysis of video quality losses in the homogenous HEVC video transcoder. Presents evaluation of CPDT transcoder, as a reference for other works on video transcoding. Optimal conditions of video transcoding are pointed out. Theoretical analysis and explanation on optimal condition of video transcoding.I.

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Section: Loss Of Quality In the Hevc Encoder -Short Remarksmentioning

confidence: 99%