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

A Compressed Domain Distortion Drift Compensation Method Applied to Surveillance Video Privacy Protection

A technology of drift compensation and privacy protection, applied in digital video signal modification, closed-circuit television system, electrical components, etc., can solve the problem of high time consumption, achieve low time consumption, low bit rate increase, simple calculation effect

Active Publication Date: 2017-01-18
HUAZHONG UNIV OF SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a compression domain distortion drift compensation method applied to monitoring video privacy protection, the purpose of which is to solve the time-consuming technical problems existing in the existing methods

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 Compressed Domain Distortion Drift Compensation Method Applied to Surveillance Video Privacy Protection
  • A Compressed Domain Distortion Drift Compensation Method Applied to Surveillance Video Privacy Protection
  • A Compressed Domain Distortion Drift Compensation Method Applied to Surveillance Video Privacy Protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0038] Below at first explain and illustrate with regard to the technical terms of the present invention:

[0039] I-frame compensation block: a block in the non-privacy area of ​​the video I-frame that performs intra-frame prediction with reference to the privacy area. Most of these blocks are located at the edge of the I-frame privacy region.

[0040] P frame compensation block: a block in t...

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 distortion drift compensation method for surveillance video privacy protection. The method comprises the steps that I frame compensation block locating is carried out, so that blocks, which need compensation, in I frames are determined, P frame compensation block locating is carried out, so that blocks, which need compensation, in P frames are determined, pixel domain compensation signals and compressed domain compensation signals are obtained and are subjected to entropy coding, the signals are used as residual data of compensation blocks, and accordingly a non-privacy zone image is clear without distortion. According to the method, distortion removing can be guaranteed, meanwhile, an I frame block frame inner prediction mode and a P frame block motion vector are not changed, video does not need recoding, distortion of a non-privacy zone can be removed, the estimation process of frame inner motion and between-frame motion is omitted, and time consumption for privacy protection is lowered.

Description

technical field [0001] The invention belongs to the field of multimedia security, and more specifically relates to a compression domain distortion drift compensation method applied to monitoring video privacy protection. Background technique [0002] H.264 / AVC is the current mainstream video coding format. It has the advantages of high coding efficiency, high image quality, network adaptability, fewer coding options, and error recovery function, so it is widely used in surveillance video compression. [0003] In recent years, with the vigorous promotion of surveillance video, citizens' personal privacy protection issues have received more and more attention. Encrypting the private area of ​​the video (such as face, license plate, etc.) in the compressed domain is an effective means to protect the privacy of surveillance video. The purpose of privacy protection is to make the video privacy area incomprehensible and the non-privacy area clear. However, due to the high-intens...

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): H04N19/85H04N19/61H04N7/18
Inventor 马晓静金海霍海锋
Owner HUAZHONG UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com