A Perception-Based Dynamic Range Scalable Coding Method for High Dynamic Range Video
A high dynamic range, dynamic range technology, applied in the field of video coding and decoding, can solve the problem of failing to realize joint coding of videos of different dynamic range levels.
Active Publication Date: 2021-07-30
北京蓝钻文化传媒有限公司
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However, the existing backward-compatible encoding methods still have shortcomings. They can only meet the needs of users with high and low dynamic ranges, and fail to achieve joint encoding of videos with different dynamic range levels.
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[0063] The invention will be further described below with reference to the accompanying drawings and in combination with specific embodiments, so that those skilled in the art can implement it by referring to the description, and the protection scope of the present invention is not limited to the specific embodiments.
[0064] The present invention relates to a perceptual-based high dynamic range video dynamic range scalable encoding method, which converts the input HDR video based on perceptual quantization (PQ) to obtain an HDR video sequence with a 12-bit quantization depth. The compatible coding formats are the same; then, in order to better meet the needs of MDR users, get closer to the characteristics of display terminals, and play the enhancement of multiple RSFs, a dynamic range scalable model based on tone mapping is proposed (TM -DRSM), which can decompose an HDR video frame into an SDR video frame and multiple RSFs through tone mapping operations; in addition, in ord...
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The invention relates to a perception-based high dynamic range video dynamic range scalable coding method, and utilizes visual perception to remove coding redundancy, thereby improving the efficiency of the dynamic range scalable coding. First, a dynamic range scalable model based on tone mapping is proposed, which decomposes the HDR video into an SDR video and multiple RSFs sequences; then, considering the perceptual characteristics, two schemes based on information entropy analysis and content segmentation are proposed respectively, according to the SDR video frame The content is perceptually filtered on the RSFs; finally, the SDR video and HDR video displayed on the MDR display device are reconstructed at the decoding end. Compared with previous research work, our method considers the effect of tone mapping operation in video coding and combines perceptual properties to better handle RSFs. Experimental results show that the proposed method can effectively improve the coding performance.
Description
technical field [0001] The invention relates to the technical field of video coding and decoding, in particular to a perception-based high dynamic range video dynamic range scalable coding method. Background technique [0002] High Dynamic Range (HDR) video can more truly reflect the real scene and bring users a more realistic visual experience. It is a new research hotspot in the field of digital media. The display devices in traditional video systems mainly use 8-bit Standard Dynamic Range (SDR) displays, which cannot directly display HDR video, and need to use Tone Mapping (TM) technology to present HDR effects on SDR display devices. Although there are a few HDR display devices that can display HDR effects, their dynamic ranges are uneven, such as 10bit, 12bit, etc. In the existing HDR video coding transmission, it is difficult for the same HDR video stream to meet the needs of multiple dynamic range (Multiple Dynamic Range, MDR) display terminals at the same time, whic...
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IPC IPC(8): H04N19/124H04N19/30H04N19/176H04N19/117G06K9/62
CPCH04N19/117H04N19/124H04N19/176H04N19/30G06F18/23213
Inventor 蒋刚毅陈璐俊郁梅彭宗举陈芬
Owner 北京蓝钻文化传媒有限公司