A novel SAO-based filtering technique for reduction in temporal flickering artifacts in H.265/HEVC

Yang, K, Wan, S, Gong, Y, Wu, H and Feng, Y 2016, 'A novel SAO-based filtering technique for reduction in temporal flickering artifacts in H.265/HEVC', Circuits, Systems and Signal Processing, vol. 35, no. 11, pp. 4099-4128.


Document type: Journal Article
Collection: Journal Articles

Title A novel SAO-based filtering technique for reduction in temporal flickering artifacts in H.265/HEVC
Author(s) Yang, K
Wan, S
Gong, Y
Wu, H
Feng, Y
Year 2016
Journal name Circuits, Systems and Signal Processing
Volume number 35
Issue number 11
Start page 4099
End page 4128
Total pages 30
Publisher Springer
Abstract This paper presents a novel filtering technique based on sample adaptive offset (SAO) in H.265/high-efficiency video coding (HEVC) for reduction in the temporal flickering artifacts and improving the coding performance. SAO is a newly introduced technique for in-loop filtering in H.265/HEVC, which derives the offsets independently for each frame in the spatial domain without considering temporal frame correlation. As a result, the temporal distortion artifacts which will have a negative effect on the subjective quality, such as flickering artifacts, cannot be effectively addressed. In this paper, the rate-distortion optimization of the newly developed SAO method, referred to as Inter-SAO, is performed on the residual samples between adjacent frames. Inter-SAO and SAO in the reference software of H.265/HEVC (i.e., the test model HM) are then combined to form the novel in-loop filter-based method, denoted as 3D-SAO filtering method, where both spatial information and temporal information are effectively utilized to reduce the overall distortion in reconstructed videos. Compared with the SAO in HM, 3D-SAO has demonstrated its advanced performance for flickering artifacts suppression. Furthermore, 3D-SAO improves the coding efficiency compared with the SAO in HM with a performance gain of up to 0.91 dB in , 1.74 dB in and 7.33 % in BD-rate reduction.
Subject Applied Mathematics not elsewhere classified
Electrical and Electronic Engineering not elsewhere classified
Keyword(s) H.265/HEVC
In-loop filtering
Rate-distortion optimization
SAO
Temporal flickering artifacts
DOI - identifier 10.1007/s00034-016-0251-5
Copyright notice © Springer
ISSN 0278-081X
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