Temporal dependent rate-distortion optimization based on distortion backward propagation
Rate-distortion optimization (RDO) is a crucial technique in block based hybrid video encoders.However, the widely used independent RDO is far from obtaining optimal coding performance.To improve the rate-distortion (R-D) performance of high efficiency video coding (HEVC), a temporal dependent RDO a...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2022-12-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022230/ |
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| _version_ | 1841539996290383872 |
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| author | Hongwei GUO Ce ZHU Xu YANG Lei LUO |
| author_facet | Hongwei GUO Ce ZHU Xu YANG Lei LUO |
| author_sort | Hongwei GUO |
| collection | DOAJ |
| description | Rate-distortion optimization (RDO) is a crucial technique in block based hybrid video encoders.However, the widely used independent RDO is far from obtaining optimal coding performance.To improve the rate-distortion (R-D) performance of high efficiency video coding (HEVC), a temporal dependent RDO algorithm was proposed.Firstly, the formula to calculate temporal distortion propagation factor was derived by using an exponential R-D function.Then, the coding distortion and motion compensation predicted error were obtained by pre-encoding, and the temporal distortion propagation factor was estimated by using distortion backward propagation.Finally, the Lagrange multiplier and quantization parameter of coding tree unit were adaptively adjusted to optimize bit resources allocation.Experimental results show that compared with the original RDO method in HEVC under the low-delay configuration, the proposed algorithm achieves an average 4.4% bit rate reduction for all test sequences, and up to 13.0% bit rate reduction for test sequence BasketballDrill, at the same reconstructed video quality. |
| format | Article |
| id | doaj-art-d4d4c8dfc4ea432c99d41c007c115a93 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2022-12-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-d4d4c8dfc4ea432c99d41c007c115a932025-01-14T06:28:42ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2022-12-014322223259391326Temporal dependent rate-distortion optimization based on distortion backward propagationHongwei GUOCe ZHUXu YANGLei LUORate-distortion optimization (RDO) is a crucial technique in block based hybrid video encoders.However, the widely used independent RDO is far from obtaining optimal coding performance.To improve the rate-distortion (R-D) performance of high efficiency video coding (HEVC), a temporal dependent RDO algorithm was proposed.Firstly, the formula to calculate temporal distortion propagation factor was derived by using an exponential R-D function.Then, the coding distortion and motion compensation predicted error were obtained by pre-encoding, and the temporal distortion propagation factor was estimated by using distortion backward propagation.Finally, the Lagrange multiplier and quantization parameter of coding tree unit were adaptively adjusted to optimize bit resources allocation.Experimental results show that compared with the original RDO method in HEVC under the low-delay configuration, the proposed algorithm achieves an average 4.4% bit rate reduction for all test sequences, and up to 13.0% bit rate reduction for test sequence BasketballDrill, at the same reconstructed video quality.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022230/HEVCrate-distortion optimizationrate-distortion dependencydistortion propagation modeladaptive Lagrange multiplier |
| spellingShingle | Hongwei GUO Ce ZHU Xu YANG Lei LUO Temporal dependent rate-distortion optimization based on distortion backward propagation Tongxin xuebao HEVC rate-distortion optimization rate-distortion dependency distortion propagation model adaptive Lagrange multiplier |
| title | Temporal dependent rate-distortion optimization based on distortion backward propagation |
| title_full | Temporal dependent rate-distortion optimization based on distortion backward propagation |
| title_fullStr | Temporal dependent rate-distortion optimization based on distortion backward propagation |
| title_full_unstemmed | Temporal dependent rate-distortion optimization based on distortion backward propagation |
| title_short | Temporal dependent rate-distortion optimization based on distortion backward propagation |
| title_sort | temporal dependent rate distortion optimization based on distortion backward propagation |
| topic | HEVC rate-distortion optimization rate-distortion dependency distortion propagation model adaptive Lagrange multiplier |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022230/ |
| work_keys_str_mv | AT hongweiguo temporaldependentratedistortionoptimizationbasedondistortionbackwardpropagation AT cezhu temporaldependentratedistortionoptimizationbasedondistortionbackwardpropagation AT xuyang temporaldependentratedistortionoptimizationbasedondistortionbackwardpropagation AT leiluo temporaldependentratedistortionoptimizationbasedondistortionbackwardpropagation |