Improved hierarchical quantisation parameter setting method for screen content coding in high efficiency video coding

Tang, Tong; Li, Ling; Li, Jun

doi:10.1049/iet-ipr.2018.6221

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Because firstly the QP determination process of RC method consumes time. Then, the bit allocation schemes of EBA-RC and ARBR-RC are not optimal, causing the low quality of key frames, which will result in quality refinement [44], and quality refinement will increase encoding complexity. Finally, though the proposed RC method uses nearly optimal bit allocation scheme, the bit control is not absolutely accurate, thus quality refinement still exist.…”

Section: Algorithm Complexity Comparisonmentioning

confidence: 99%

Down-Sampling Based Rate Control for Mobile Screen Video Coding

Tang

Yang

et al. 2019

IEEE Access

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With the improvement of hardware capability of mobile devices, mobile devices are more and more widely used. Mobile screen video recording is one of the important applications. However, the generated video files will occupy plenty of memory resources, which are limited in mobile devices. Fortunately, a well designed video coding method could effectively relieve such pressure. Therefore, aimed at the mobile screen video, this paper proposes a down-sampling based rate control algorithm to improve the compression efficiency. Firstly, the source video is down sampled by a factor of 4. Then, the down sampled video is encoded twice and the coding information is stored. Finally, based on the stored coding information, the real encoding process is optimized at bit allocation and bit control. Experimental results show that compared with the default rate control method in high efficiency video coding test model, the proposed method could obviously improve rate distortion performance and bit control accuracy.INDEX TERMS Rate control, video coding, mobile, screen content, HEVC.

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Section: Algorithm Complexity Comparisonmentioning

confidence: 99%

Down-Sampling Based Rate Control for Mobile Screen Video Coding

Tang

Yang

et al. 2019

IEEE Access

Self Cite

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“…For the HEVC hierarchical coding structure, some studies concern selecting quantization parameter (QP) adaptively instead of the fixed QP setting. For example, by exploring inter-frame dependencies, [4][5][6][7][8] proposed adaptive QP cascading (QPC) methods under low-delay (LD) configuration, and [9][10][11][12] presented adaptive QPC methods under random access (RA) configuration. These QPC methods adaptively set different QPs for the frames to be encoded according to both coding structure and video content changes.…”

Section: Introductionmentioning

confidence: 99%

Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC

et al. 2021

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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.INDEX TERMS Rate-distortion optimization, high efficiency video coding, adaptive Lagrange multiplier, rate-distortion model, temporal dependency.

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Pre-encoding based temporal dependent rate–distortion optimization for HEVC

Guo

Zhu

et al. 2023

Signal Processing: Image Communication

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Improved hierarchical quantisation parameter setting method for screen content coding in high efficiency video coding

Cited by 7 publications

References 25 publications

Down-Sampling Based Rate Control for Mobile Screen Video Coding

Down-Sampling Based Rate Control for Mobile Screen Video Coding

Rate-Distortion Optimization Based on Two-Pass Encoding for HEVC

Pre-encoding based temporal dependent rate–distortion optimization for HEVC

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