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

A gop-level qp‑offset setting method

A frame-level and series-level technology, applied in the field of GOP-level quantization parameter setting supporting random access structure, can solve the problem of not considering GOP reference correlation, only considering GOP inter-frame correlation, etc.

Active Publication Date: 2018-01-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the frame-level hierarchical QP-Offset technology under the RA coding structure only considers the inter-frame correlation within the GOP, and has not considered the reference correlation between GOPs.

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 gop-level qp‑offset setting method
  • A gop-level qp‑offset setting method
  • A gop-level qp‑offset setting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0064] In order to more clearly show the GOP-level QP-Offset setting method proposed by this method, Table 1 shows the setting process.

[0065] Table 1 GOP-level QP-Offset setting method

[0066]

[0067] In this embodiment, the value of α is 1 / 2 of the empirical value; this embodiment counts the reference relationship between GOPs under the number of general GOPs (3 / 4 / 6 / 8) in BIG-GOP, and expands to the number of GOPs that is n situation, such as Figure 5 shown. Figure 5 , Figure 7 Among them, ΔWi obeys a certain fixed attenuation law. Starting from the last GOP (n-1), two GOPs are used as a group, and the amplitude of the first GOP group is (ΔW n-1 , ΔW n-2 ), the amplitude presents an exponential decay of 1 / 2, as shown in formula (7); that is, the influence intensity decay gradient factor from GOP-(n-1) to GOP-1 tends to the minimum value 0, Image 6 ΔW is listed when the number of GOP is 25 i Case.

[0068]

[0069] Figure 5 Shows the influence strength ...

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 provides a GOP-level QP-Offset setting method, which belongs to the technical field of video processing, and particularly relates to a method for setting quantization parameters under the condition of supporting Random Access (RA) structure. In the present invention, by analyzing the reference relationship between GOPs under the RA structure (which can be translated as the influence intensity of the current GOP on the subsequent GOP), the influence intensity attenuation factor of the GOP is used to describe the different importance of the GOP, and this is used as the allocation of the GOP level QP- The basis of Offset. The present invention can further eliminate redundant information in the time domain on the basis of the original frame-level layered QP-Offset technology. It can be known from experiments on HEVC and AVS2 platforms that the present invention further saves bits and improves coding performance without increasing time complexity.

Description

technical field [0001] The invention belongs to the technical field of video processing, and in particular relates to a method for setting quantization parameters at the GOP level under all random access (Random Access, RA) structures. Background technique [0002] In recent years, people's demand for high-definition and ultra-high-definition video has become more and more vigorous, so there are more and more demands for higher compression efficiency. At present, mainstream encoders still use the traditional hybrid coding framework, which mainly includes prediction, transformation, quantization, filtering, and entropy coding. [0003] A video sequence is composed of several time-continuous images, and the video sequence can be divided into several groups of pictures (Group of Pictures GOP) for encoding. The Random-access (RA) coding structure is a time-domain hierarchical structure (Hierarchical B structure, HBP). Usually, 8 frames are used as a GOP, and a random-access fra...

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): H04N19/177H04N19/31
Inventor 朱策徐丽英周益民王勇钟敏高艳博
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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