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A Multi-User-Oriented HDR Video Dynamic Range Scalable Coding Method

A technology of dynamic range and hierarchical coding, which is applied in the field of video coding and decoding, and can solve problems such as failure to realize dynamic range-level video joint coding

Active Publication Date: 2022-01-18
南天数金(北京)信息产业发展有限公司
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Problems solved by technology

Rusanovskyy et al proposed to use Dynamic Range Adjustment (Dynamic Range Adjustment, DRA) backward compatible coding method to encode HDR video, compared with non-backward compatible coding method, its performance has been improved; Mir et al. The improvement scheme of backward compatible HDR video coding is compared with the performance of single-layer HLG. However, the existing backward compatible coding methods still have shortcomings. Joint coding of range-level video

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[0037] 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.

[0038] The present invention relates to a multi-user-oriented HDR video dynamic range scalable coding method, comprising the following steps:

[0039] 1. The input HDR video is transformed into multiple dynamic range-level HDR video sequences represented by different quantization depths (such as 8bit, 10bit, 12bit, etc.) through perceptual quantization (PQ)-based conversion processing;

[0040] 2. In order to make the existing MDR display device bring high-quality HDR video images to users, a Dynamic Range Scalable Model (Dynamic Range Scalable Model, DRSM) is proposed to decompose an HDR video frame into an SDR A basic frame and multiple residual signal frames...

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Abstract

The present invention relates to a multi-user-oriented HDR video dynamic range scalable encoding method. First, considering the perception characteristics of HDR video, a dynamic range scalable model is proposed, which decomposes HDR videos of different dynamic range levels into a standard dynamic range video and Multiple residual signal frame sequences; then, combined with the brightness masking effect and human eye perception characteristics, quantize and filter multiple residual signal frame sequences, filter out scattered data points in the residual, and retain the residual signal frame sequence The overall difference information between adjacent dynamic range levels improves the coding efficiency of the residual signal frame sequence; finally, the standard dynamic range video and the HDR video of each dynamic range level are reconstructed at the decoding end to adapt to multi-client display devices. The method also utilizes the visual masking property to suppress the noise and improve the efficiency of the dynamic range scalable coding.

Description

technical field [0001] The present invention relates to the technical field of video coding and decoding, in particular to a multi-user-oriented HDR video dynamic range scalable coding method. Background technique [0002] High dynamic range (High Dynamic Range, HDR) video is a new research hotspot in the field of digital media. It can more truly reflect the real scene and bring users a more realistic visual experience. Traditional video system client display devices mainly use 8-bit standard dynamic range (Standard Dynamic Range, SDR) displays, which cannot directly display HDR video. A few existing HDR display devices display or partially display HDR video by expanding the brightness range, but the dynamic range of these HDR display devices is uneven, such as 10bit, 12bit, etc. In the existing HDR video encoding and transmission, it is difficult for the same HDR video stream to meet the requirements of multiple users with different dynamic range display devices at the sam...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/172H04N19/186H04N19/98H04N19/124
CPCH04N19/124H04N19/172H04N19/186H04N19/98
Inventor 蒋刚毅陈璐俊郁梅
Owner 南天数金(北京)信息产业发展有限公司
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