Multiple user-oriented dynamic range scalable coding method for HDR videos

A dynamic range, hierarchical coding technology, applied in the field of video coding and decoding, can solve the problem of failing to achieve dynamic range-level video joint coding, and achieve the effect of improving efficiency and coding efficiency.

Active Publication Date: 2018-07-27
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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  • Multiple user-oriented dynamic range scalable coding method for HDR videos
  • Multiple user-oriented dynamic range scalable coding method for HDR videos
  • Multiple user-oriented dynamic range scalable coding method for HDR videos

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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 invention relates to a multiple user-oriented dynamic range scalable coding method for HDR videos. The method comprises the steps of: firstly, proposing a dynamic range scalable model in consideration with HDR video sensing characteristics, and decomposing HDR videos of different dynamic ranges into standard dynamic range videos and a multiple residual signal frame sequence; then, quantizing and filtering the multiple residual signal frame sequence in combination with the luminance masking effect and the human eye sensing characteristics to filter out scattered data points in the residualand retain overall difference information between adjacent dynamic ranges of the residual signal frame sequence, thus improving the coding efficiency of the residual signal frame sequence; and finally, reconstructing the standard dynamic range videos and the HDR videos of all the dynamic ranges at a decoding end to adapt to a multi-user display device. The method also suppresses noise by using thevisual masking characteristic and improves the efficiency of 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 Applications(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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