Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/87628
Title: | Fast HEVC to SCC transcoder by early CU partitioning termination and decision tree-based flexible mode decision for intra-frame coding | Authors: | Kuang, W Chan, YL Tsang, SH Siu, WC |
Issue Date: | 2019 | Source: | IEEE access, 2019, v. 7, p. 8773-8788 | Abstract: | Screen content coding (SCC) was developed to enhance High Efficiency Video Coding (HEVC) for encoding screen content videos. However, HEVC has dominated the market for many years, and it leaves many legacy screen content videos encoded by HEVC. Therefore, it is desired that the legacy screen content videos are migrated from HEVC to SCC to improve the coding efficiency. This paper presents a fast transcoding algorithm by analyzing various features from four categories. They are the features from the HEVC decoder, static features, dynamic features, and spatial features. First, the coding unit (CU) depth level collected from the HEVC decoder is utilized to early terminate the CU partition in SCC. Second, a flexible encoding structure is proposed to make early mode decisions with the help of various features. On the one hand, high decision accuracy is achieved because mode decision is considered from different aspects by utilizing features from more than one category. On the other hand, high computational complexity is reduced because the flexible structure considers the decision of each mode separately. The experimental Results show that the proposed algorithm provides 51.24% and 54.65% re-encoding time reduction with 1.32% and 1.25% negligible Bjontegaard delta bitrate loss for YUV 4:2:0 and YUV 4:4:4 screen content sequences using all-intra configuration, respectively. |
Keywords: | Transcoding Screen content coding (SCC) High efficiency video coding (HEVC) Fast algorithm Machine learning |
Publisher: | Institute of Electrical and Electronics Engineers | Journal: | IEEE access | EISSN: | 2169-3536 | DOI: | 10.1109/ACCESS.2018.2890720 | Rights: | © 2019 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. Posted with permission of publisher. The following publication W. Kuang, Y. Chan, S. Tsang and W. Siu, "Fast HEVC to SCC Transcoder by Early CU Partitioning Termination and Decision Tree-Based Flexible Mode Decision for Intra-Frame Coding," in IEEE Access, vol. 7, pp. 8773-8788, 2019 is available at https://dx.doi.org/10.1109/ACCESS.2018.2890720 |
Appears in Collections: | Journal/Magazine Article |
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File | Description | Size | Format | |
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Kuang_Fast_HEVC_SCC | 13.76 MB | Adobe PDF | View/Open |
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