Unlock instant, AI-driven research and patent intelligence for your innovation.

Code rate allocation method, system and medium based on just perceivable distortion in space-time domain

A code rate allocation, space-time domain technology, applied in the field of code rate allocation based on space-time domain just perceivable distortion, can solve the problem of inaccurate code rate allocation results, not taking into account different sensitivities, etc.

Active Publication Date: 2021-04-23
SHANGHAI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this algorithm does not take into account that the human eye has different sensitivities to different textures in the image, and the result of the bit rate allocation is inaccurate

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 allocation method, system and medium based on just perceivable distortion in space-time domain
  • Code rate allocation method, system and medium based on just perceivable distortion in space-time domain
  • Code rate allocation method, system and medium based on just perceivable distortion in space-time domain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0168] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0169] A code rate allocation method based on just perceivable distortion in the space-time domain provided according to the present invention includes:

[0170] SJND model building steps: according to the masking degree and brightness contrast in the airspace, establish the SJND just perceptible distortion model in the airspace;

[0171] Pixel SJND value acquisition step: according to the established spatial domain perceptible distortion model, obtain the SJND value of each pixel point p(x, y) on the i...

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 code rate allocation method, system and medium based on just perceivable distortion in the space-time domain, including: SJND model building step: according to the masking degree and brightness contrast in the space domain, establish the just perceivable distortion model SJND in the space domain; Pixel SJND value acquisition steps: According to the established spatial domain perceptible distortion model, obtain the SJND value of each pixel point p(x, y) on the image, that is, the maximum distortion that can be allowed for each pixel in the spatial domain; spatial domain CTU code rate weight Allocation step: according to the established airspace just perceptible distortion model SJND, the code rate of the airspace CTU is weighted; the present invention uses the space-time domain just perceivable distortion model to realize the code rate allocation according to human visual characteristics, and first uses the airspace SJND to obtain The spatial code rate allocation weight of each CTU, and then calculate the code rate allocation weight in the time domain through the time domain TJND model, which improves the accuracy of the code rate allocation and greatly improves the subjective quality of the video.

Description

technical field [0001] The present invention relates to the technical field of image / video coding bit rate control, in particular, to a bit rate allocation method, system and medium based on just perceivable distortion in the space-time domain. Background technique [0002] In recent years, with the rapid development of the video industry, a large amount of video data has emerged. If the video data is not compressed, it will not be able to be transmitted and stored. Let's take the high-definition video format as an example, assuming that its resolution is 1920*1080, there are three color components of Y, U, and V, each pixel is represented by 8 bits, and the frame rate is 25Hz. If the video sequence is not compressed, the amount of data transmitted for one frame of image is 1920*1080*3*8≈5.9 (megabytes), and the amount of data transmitted for one second will reach 5.9*25=147.5 (megabytes) . Assuming that the video sequence is 90 minutes long, the amount of data to transmit...

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): H04N19/146H04N19/147H04N19/177H04N19/186
CPCH04N19/146H04N19/147H04N19/177H04N19/186
Inventor 滕国伟徐佳玲
Owner SHANGHAI UNIV