Code rate control method fused with visual perception characteristic

A rate control and visual perception technology, applied in the field of video processing, can solve problems such as ignoring the visual characteristics of the human eye and unsatisfactory bit allocation, achieve subjective quality and rate-distortion performance improvement, save coding bits, and improve coding performance Effect

Active Publication Date: 2017-01-04
BEIJING UNIV OF TECH
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bit allocation method in HM15.0 makes effective use of bit resources, it ignores the visual characte

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
  • Code rate control method fused with visual perception characteristic
  • Code rate control method fused with visual perception characteristic
  • Code rate control method fused with visual perception characteristic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] In order to improve the subjective quality of video, the present invention considers the impact of brightness and motion intensity on human visual perception, and discloses a HEVC code rate control method that integrates visual perception characteristics. The process is as follows figure 1 As shown, follow the steps below:

[0043] Step 1: Perform GOP layer rate control initialization.

[0044] Step 2: Perform frame layer rate control initialization to determine the current frame f n Whether it is an I frame, if so, then encode an I frame, and then enter the seventh step; if not, then enter the third step.

[0045] Step 3: First, read the current frame f n Luminance component and reference frame f n-1 brightness component. N is the number of LCUs in the current coding frame, Yi (x,y) and Y i '(x, y) are the luminance values ​​of...

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 invention discloses a code rate control method fused with a visual perception characteristic. Code rate distribution of an LCU layer is guided according to influence of brightness and exercise intensity to human visual perception, and furthermore, in order to improve rate-distortion performance, a Lagrange multiplier lambda and a quantization parameter QP are corrected on the basis of the visual perception characteristic. According to the technical scheme of the invention, compared with an international coding standard HEVC (HM15.0), the code rate control method fused with the visual perception characteristic has the advantages that code rate control accuracy is not changed basically, subjective quality of a video is improved, rate-distortion performance can be better, bit resources are saved, contradiction between the quality of a video coding reconstructed image and coding resources is relieved, and coding performance of HEVC is improved.

Description

technical field [0001] The invention belongs to the technical field of video processing, and relates to a code rate control method integrating visual perception characteristics. Background technique [0002] With the increasing perfection and wide application of multimedia services, the types of video services have increased sharply, and high-definition video and ultra-high-definition video (4k×2k resolution; 8k×4k resolution) have gradually become popular. The high-efficiency video coding standard HEVC (High Efficiency Video Coding, HEVC) came into being. In order to ensure video quality under the condition of limited channel bandwidth and transmission delay, it is necessary to allocate coding bits reasonably. Therefore, the HEVC standard adopts the rate control technology based on the R-λ model, which is added to the HEVC test model HM15.0. In HM15.0, rate control is carried out in two steps: ① allocate target bits for each coding unit; ② determine quantization parameter...

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
IPC IPC(8): H04N19/147H04N19/172H04N19/186H04N19/19H04N19/124H04N19/126
CPCH04N19/124H04N19/126H04N19/147H04N19/172H04N19/186H04N19/19
Inventor 刘鹏宇丰泽琪
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap