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Water mark method and device for digital video signal and detecting method and device

A digital video and signal technology, applied in the direction of digital video signal modification, color TV parts, TV system parts, etc., to achieve the effect of improving the type and degree of distortion

Inactive Publication Date: 2009-07-08
PEKING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a new robust watermarking method for adding watermarks to digital video signals and detecting whether digital video signals are embedded with watermarks, so as to effectively resist various types of time synchronization distortion, space synchronization distortion, photometric distortion and combinations thereof Distortion problem

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  • Water mark method and device for digital video signal and detecting method and device
  • Water mark method and device for digital video signal and detecting method and device
  • Water mark method and device for digital video signal and detecting method and device

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Embodiment Construction

[0055] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

[0056] Through the study of video shot segmentation, it can be known that:

[0057] Since the shot boundary is an important feature of the video, the shot boundary can still be detected even if time synchronization distortions such as frame loss and frame rate changes occur without significantly affecting the content. According to this feature, the present invention utilizes shot segmentation to obtain synchronous information required for watermark embedding and detection.

[0058] Such as figure 1 As shown, the equipment that embeds the watermark into the video signal includes:

[0059] It is used to encode and modulate the watermark information into a bipolar binary watermark vector W r The watermark modulation unit 100, where W r =(w(0),...,w(n)...,w(N-1)), w(n) is W r The nth component of , n=0~N-1, N is a positive integer greate...

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Abstract

This invention discloses a method and a device for adding Rodust watermark to digital video signals and a method and a device for testing if the watermark is inserted into the digital video signals, in which, the method includes: dividing a digital video signal into lens sequence and selecting adjacent lens from the sequence to form a video segment, inserting modulated bipolar binary watermark vector Wr, and Wr=(w(0),..., w(n)..., w(N-1)), N is a positive integer greater than 1, which can resist against multiple kinds of time synchronous distortion, space synchronous distortion, luminosity distortion and their combined distortion.

Description

technical field [0001] The invention belongs to the field of digital video processing, in particular to a method and equipment for adding watermarks to digital video signals, and a method and equipment for detecting whether watermarks are embedded in digital video signals. Background technique [0002] Video watermarking is the key technology of digital video copyright protection. The most challenging problem of digital video watermarking is how to make the watermark survive and be detected correctly after undergoing conventional video processing in various video applications, which is the robustness of watermarking. For video, conventional signal processing includes: time synchronization distortion (such as frame insertion, frame deletion, frame rate conversion, etc.), space synchronization distortion (such as cropping, scaling, translation, rotation, perspective, nonlinear transformation, spherical transformation, Various geometric transformations such as local geometric ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N5/913H04N1/32G06T1/00H04N19/467
Inventor 杨列森郭宗明
Owner PEKING UNIV