Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest
Aiming at the problems that the strategy of target bit allocation at the CTU layer has deviations from the human subjective observation mechanism, and the update phase of parametric model has a higher complexity in the JCTVC-K0103 rate control algorithm of ITU-T H.265/high efficiency video coding (H...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/4354296 |
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| author | Renjie Song Yuandong Zhang |
| author_facet | Renjie Song Yuandong Zhang |
| author_sort | Renjie Song |
| collection | DOAJ |
| description | Aiming at the problems that the strategy of target bit allocation at the CTU layer has deviations from the human subjective observation mechanism, and the update phase of parametric model has a higher complexity in the JCTVC-K0103 rate control algorithm of ITU-T H.265/high efficiency video coding (HEVC) standard. Optimized rate control (ORC) algorithm of ITU-T H.265/HEVC based on region of interest (ROI) is proposed. Firstly, the algorithm extracts the region of interest of video frames based on time and space domains by using the improved Itti model. Then, the weight of target bits w is recalculated based on space-time domains to improve the rate control accuracy, and the target bits are distributed based on ROI by the adaptive weight algorithm once again to make the output videos more attuned with the human visual attention mechanism. Finally, the quasi-Newton algorithm is used to update the rate distortion model, which reduces the computational complexity in the update phase of the parametric model. The experimental results show that the ORC algorithm can obtain a better subjective quality in the compressed results with less bit error compared with the other two algorithms. Meanwhile, the rate distortion performance of the ORC algorithm is better on the premise of guaranteeing rate control performance. |
| format | Article |
| id | doaj-art-e26d111d26124b70892020e65726cf37 |
| institution | DOAJ |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-e26d111d26124b70892020e65726cf372025-08-20T03:21:07ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552020-01-01202010.1155/2020/43542964354296Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of InterestRenjie Song0Yuandong Zhang1School of Computer Science, Northeast Electric Power University, Jilin 132012, ChinaSchool of Computer Science, Northeast Electric Power University, Jilin 132012, ChinaAiming at the problems that the strategy of target bit allocation at the CTU layer has deviations from the human subjective observation mechanism, and the update phase of parametric model has a higher complexity in the JCTVC-K0103 rate control algorithm of ITU-T H.265/high efficiency video coding (HEVC) standard. Optimized rate control (ORC) algorithm of ITU-T H.265/HEVC based on region of interest (ROI) is proposed. Firstly, the algorithm extracts the region of interest of video frames based on time and space domains by using the improved Itti model. Then, the weight of target bits w is recalculated based on space-time domains to improve the rate control accuracy, and the target bits are distributed based on ROI by the adaptive weight algorithm once again to make the output videos more attuned with the human visual attention mechanism. Finally, the quasi-Newton algorithm is used to update the rate distortion model, which reduces the computational complexity in the update phase of the parametric model. The experimental results show that the ORC algorithm can obtain a better subjective quality in the compressed results with less bit error compared with the other two algorithms. Meanwhile, the rate distortion performance of the ORC algorithm is better on the premise of guaranteeing rate control performance.http://dx.doi.org/10.1155/2020/4354296 |
| spellingShingle | Renjie Song Yuandong Zhang Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest Journal of Electrical and Computer Engineering |
| title | Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest |
| title_full | Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest |
| title_fullStr | Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest |
| title_full_unstemmed | Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest |
| title_short | Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest |
| title_sort | optimized rate control algorithm of high efficiency video coding based on region of interest |
| url | http://dx.doi.org/10.1155/2020/4354296 |
| work_keys_str_mv | AT renjiesong optimizedratecontrolalgorithmofhighefficiencyvideocodingbasedonregionofinterest AT yuandongzhang optimizedratecontrolalgorithmofhighefficiencyvideocodingbasedonregionofinterest |