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Copyright protection technology based on audio and video analysis

A technology for copyright protection, audio and video, used in program/content distribution protection, image data processing, instruments, etc.

Pending Publication Date: 2022-03-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current research is aimed at one of the media, and the existing research on the intersection of multiple media is still very little.

Method used

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  • Copyright protection technology based on audio and video analysis
  • Copyright protection technology based on audio and video analysis
  • Copyright protection technology based on audio and video analysis

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0031] It should be understood that terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0032] An effective robust watermarking method of the present embodiment comprises the following steps:

[0033] 1) Prepare a binary image W with a size of K×L as the watermark signal image.

[0034] 2) Scrambling the watermark signal image and rescanning it into a K×L one-dimensional sequence.

[0035] 3) Segment the one-dimensional sequence into equal length segments, then the jth watermark segment is:

[0036]

[0037] 4) Modulate the watermark segment with a pseudo-random sequence, through the modulation formula (3).

[0038] 5) The watermark information is embedded into audio and ...

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Abstract

The invention discloses a copyright protection method based on audio and video analysis. The copyright protection method comprises the following steps: firstly, separating audio and video data streams, processing a binary image to be used as watermark information, performing DCT (Discrete Cosine Transform) on a video frame and segmented audio, and respectively embedding the watermark information; and performing DCT inverse transformation to generate audio and video streams with watermarks. And finally, synthesizing the two streams. When watermark detection is carried out, a video stream and an audio stream are separated firstly, and then a binary watermark sequence (namely copyright information) is extracted by using a related demodulation method. According to the method, a spread spectrum watermark and media stream segmentation processing method is used for reference, and the obtained method has very high robustness for attacks on multimedia sequences.

Description

technical field [0001] The invention relates to the technical field of computer multimedia, in particular to a method for audio and video copyright protection. Background technique [0002] Digital watermarking technology has been extensively studied in the field of images first, but today more and more watermarking schemes are dedicated to protecting new digital multimedia data, such as audio, video, text and 3D grids. The current multimedia applications are more about combining audio and video for transmission, storage and processing, such as VCD, VOD on demand, video conference and other applications. However, most of the current research focuses on one of the media, and there are few researches on the intersection of multiple media in the existing watermarking technology. Since the digital watermarking technology is closely related to the carrier data, if the audio and video features can be fully exploited, the designed watermark will have better security and practical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/10G06T1/00
CPCG06F21/10G06T1/005
Inventor 罗洋彭德中王骞刘杰张利君银大伟蒋瑞付俊英
Owner SICHUAN UNIV