Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC
Rate-distortion optimization (RDO) is a crucial technique in block-based hybrid video encoders, which determines the coding option for a certain coding unit to achieve optimal rate-distortion (R-D) performance. However, the current RDO, which is implemented into High Efficiency Video Coding (HEVC) t...
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
IEEE
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/982c4b47970c4c1fba9ab8179abc946e |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:doaj.org-article:982c4b47970c4c1fba9ab8179abc946e |
|---|---|
| record_format |
dspace |
| spelling |
oai:doaj.org-article:982c4b47970c4c1fba9ab8179abc946e2021-11-09T00:00:59ZRate-Distortion Optimization Based on Two-Pass Encoding for HEVC2169-353610.1109/ACCESS.2021.3123393https://doaj.org/article/982c4b47970c4c1fba9ab8179abc946e2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9590538/https://doaj.org/toc/2169-3536Rate-distortion optimization (RDO) is a crucial technique in block-based hybrid video encoders, which determines the coding option for a certain coding unit to achieve optimal rate-distortion (R-D) performance. However, the current RDO, which is implemented into High Efficiency Video Coding (HEVC) test model, i.e., HM, is far from being global optimal as it ignores the interaction among coding options. Recent studies have shown that the dependent RDO methods can improve the coding efficiency of encoders by exploring the R-D dependency among coding units, but these methods do not consider the R-D characteristics of coding units. In this paper, we proposed a two-pass encoding based RDO method, which combines both the R-D dependency and R-D characteristics, to further improve the coding efficiency. First, a frame is encoded with the original HEVC scheme to obtain the R-D model of coding tree units (CTU) and the bit budget of the frame. Second, an optimal equation combines the R-D model and R-D dependency is established to adaptively determine the Lagrange multiplier and quantization parameter (QP) for each CTU. Finally, the current frame is encoded with a new scheme again. Experimental results show that compared with the original HM, the proposed method obtains R-D performance improvements of 5.3% and 5.6% on average under configurations of low-delay B and P frames, respectively.Hongwei GuoTianqing XiaoXiangsuo FanYuyang LiuShuai LiuIEEEarticleRate-distortion optimizationhigh efficiency video codingadaptive Lagrange multiplierrate-distortion modeltemporal dependencyElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 146888-146899 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Rate-distortion optimization high efficiency video coding adaptive Lagrange multiplier rate-distortion model temporal dependency Electrical engineering. Electronics. Nuclear engineering TK1-9971 |
| spellingShingle |
Rate-distortion optimization high efficiency video coding adaptive Lagrange multiplier rate-distortion model temporal dependency Electrical engineering. Electronics. Nuclear engineering TK1-9971 Hongwei Guo Tianqing Xiao Xiangsuo Fan Yuyang Liu Shuai Liu Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC |
| description |
Rate-distortion optimization (RDO) is a crucial technique in block-based hybrid video encoders, which determines the coding option for a certain coding unit to achieve optimal rate-distortion (R-D) performance. However, the current RDO, which is implemented into High Efficiency Video Coding (HEVC) test model, i.e., HM, is far from being global optimal as it ignores the interaction among coding options. Recent studies have shown that the dependent RDO methods can improve the coding efficiency of encoders by exploring the R-D dependency among coding units, but these methods do not consider the R-D characteristics of coding units. In this paper, we proposed a two-pass encoding based RDO method, which combines both the R-D dependency and R-D characteristics, to further improve the coding efficiency. First, a frame is encoded with the original HEVC scheme to obtain the R-D model of coding tree units (CTU) and the bit budget of the frame. Second, an optimal equation combines the R-D model and R-D dependency is established to adaptively determine the Lagrange multiplier and quantization parameter (QP) for each CTU. Finally, the current frame is encoded with a new scheme again. Experimental results show that compared with the original HM, the proposed method obtains R-D performance improvements of 5.3% and 5.6% on average under configurations of low-delay B and P frames, respectively. |
| format |
article |
| author |
Hongwei Guo Tianqing Xiao Xiangsuo Fan Yuyang Liu Shuai Liu |
| author_facet |
Hongwei Guo Tianqing Xiao Xiangsuo Fan Yuyang Liu Shuai Liu |
| author_sort |
Hongwei Guo |
| title |
Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC |
| title_short |
Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC |
| title_full |
Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC |
| title_fullStr |
Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC |
| title_full_unstemmed |
Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC |
| title_sort |
rate-distortion optimization based on two-pass encoding for hevc |
| publisher |
IEEE |
| publishDate |
2021 |
| url |
https://doaj.org/article/982c4b47970c4c1fba9ab8179abc946e |
| work_keys_str_mv |
AT hongweiguo ratedistortionoptimizationbasedontwopassencodingforhevc AT tianqingxiao ratedistortionoptimizationbasedontwopassencodingforhevc AT xiangsuofan ratedistortionoptimizationbasedontwopassencodingforhevc AT yuyangliu ratedistortionoptimizationbasedontwopassencodingforhevc AT shuailiu ratedistortionoptimizationbasedontwopassencodingforhevc |
| _version_ |
1718441404365012992 |