Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A rate-distortion optimization method based on hdr-vdp-2 distortion criterion

A HDR-VDP-2, rate-distortion optimization technology, applied in the field of HDR video coding, can solve the problems of not being able to well reflect the degree of distortion of HDR image coding and high-performance video coding, and achieve the effect of improving rate-distortion performance

Active Publication Date: 2021-10-15
NINGBO UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although related research has improved the coding efficiency to a certain extent, it has not solved the problem that the traditional rate-distortion metrics in High Efficiency Video Coding (HEVC) cannot reflect the coding distortion of HDR images well.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A rate-distortion optimization method based on hdr-vdp-2 distortion criterion
  • A rate-distortion optimization method based on hdr-vdp-2 distortion criterion
  • A rate-distortion optimization method based on hdr-vdp-2 distortion criterion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The invention is further described below with reference to the accompanying drawings and in conjunction with specific embodiments, so that those skilled in the art can implement it with reference to the description, and the protection scope of the present invention is not limited to the specific embodiments.

[0028] The present invention relates to a rate-distortion optimization method based on HDR-VDP-2 distortion criterion, comprising the following steps:

[0029](1) Distortion calculation for the current coding unit (CodingUnit, CU) based on the HDR-visible difference predictor-2 (HDR-VDP-2) distortion criterion: first calculate its HDR-VDP-2 for the CU after the current encoding reconstruction The evaluation index P map , and using the pair P map Measure the degree of distortion D of the image block of the current CU by calculating the norm of 1 HDR , namely D HDR =||P map || 1 ; where P map Corresponding to each pixel in the current CU, there is a probabilit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a rate-distortion optimization method based on HDR‑VDP‑2 measurement distortion, and corrects the Lagrangian multiplier λ according to the revised λ‑QP relationship, so as to further optimize the selection strategy of coding parameters in the HDR video coding process , to improve the performance of HEVC Main 10 encoding HDR video. Firstly, a distortion calculation method based on HDR‑VDP‑2 is designed and applied to the coding tree unit structure of HEVC, and a rate-distortion cost function model based on the HDR‑VDP‑2 distortion criterion is established; then, in order to determine the rate-distortion Lagrangian multiplier λ in the cost function, the present invention adopts fixed Lagrange multiplier λ to encode, and utilizes multi-QP optimization technology to count the optimal QP value, thereby revises λ-QP function relation; Finally, based on Modify the relationship between λ‑QP to determine the Lagrangian multiplier λ of the currently encoded video frame, and apply the proposed rate-distortion cost function model to the HEVC Main 10 encoder. At the same time, the present invention can retain more texture detail information of coded and reconstructed video, and can improve the performance of HEVC coded HDR video.

Description

technical field [0001] The present invention relates to the technical field of HDR video coding, in particular to a rate-distortion optimization method based on HDR-VDP-2 distortion criterion. Background technique [0002] In real scenes, the distribution of real illuminance values ​​is very wide: in the case of direct sunlight, the scene brightness can reach 10 5 cd / m 2 , and the brightness value in the dark place may only be 10 -3 cd / m 2 . Compared with ordinary low dynamic range (LDR) images, high dynamic range (HDR) images have a larger dynamic range, and HDR images can express more layers, so as to achieve a more realistic light and shadow Effect. However, the latest video coding standard HEVC (High Efficiency Video Coding) is designed for LDR video. With the increase of bit depth and dynamic range, this also brings new challenges to HDR video coding, so HDR video coding has become At present, the key technology of HDR video encoding and transmission urgently need...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/147H04N19/19H04N19/186H04N19/154
CPCH04N19/147H04N19/154H04N19/186H04N19/19
Inventor 蒋刚毅杨桐郁梅彭宗举陈芬
Owner NINGBO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com