High dynamic range video dynamic range scalable coding method based on perception

Abstract

The invention relates to a high dynamic range video dynamic range scalable coding method based on perception, which uses visual perception to remove coding redundancy and improves the efficiency of dynamic range scalable coding. The high dynamic range video dynamic range scalable coding method comprises the following steps: firstly, proposing a dynamic range scalable model based on tone mapping, decomposing an HDR (High Dynamic Range) video into one SDR (Standard Dynamic Rang) video and a plurality of RSFs (Residual signal Frame) sequences; then, in consideration of perception characteristics,respectively proposing two schemes based on information entropy analysis and content segmentation, and performing perceptual filtering processing on the RSFs according to the content of an SDR videoframe; and finally, reconstructing the SDR video and the HDR video displayed on MDR (Multiple Dynamic Range) display equipment at a decoding end. Compared with the previous research work, the method of the invention considers the influence of a tone mapping operation in video coding, and the RSFs are better processed in combination with the perception characteristics. Experimental results show that the method proposed by the invention 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...

AI Technical Summary

Problems solved by technology

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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