Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multimedia copyright protection method for supporting preview and tracking unauthorized distribution

A copyright protection and multimedia technology, applied in the direction of program/content distribution protection, selective content distribution, instruments, etc., can solve the problems of loss of economic interests of copyright owners, inability to track over-distributed users, etc., to achieve protection of interests and high returns Effect

Active Publication Date: 2011-05-18
NANJING UNIV OF SCI & TECH
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the existing visible and erasable watermarking methods, there is a potential problem: when the user uses the correct key to erase the visible watermark from the multimedia carrier, the user can erase the visible watermark Multimedia distribution to other unauthorized users
This kind of multimedia super-distribution will bring huge economic losses to multimedia copyright owners, and the visible erasable watermark method itself cannot track unauthorized super-distribution users

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
  • Multimedia copyright protection method for supporting preview and tracking unauthorized distribution
  • Multimedia copyright protection method for supporting preview and tracking unauthorized distribution
  • Multimedia copyright protection method for supporting preview and tracking unauthorized distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention supports the method for previewing and tracking the multimedia copyright protection of unauthorized distribution, which is completed respectively at the sending end (such as the server end, etc.) and the receiving end (such as the user end, etc.), such as figure 2 shown. In the description of the drawings, the symbol represents the operation of multiplication, represents the operation of subtraction, Indicates the addition operation.

[0023] combine Figure 4 , taking a video as an example, give a visual watermark to embed a method at the sending end, the specific steps are as follows:

[0024] (1) Each frame of the multimedia video data and the visible watermark image data are respectively made non-overlapping o×q (the value of o, q is determined according to the size of the original image and the watermark image, which can be the same or different. The following is 8× 8 as an example to illustrate) block. Then, after performing DCT tra...

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 multimedia copyright protection method for supporting preview and tracking unauthorized distribution, which comprises the following steps of: embedding a visible watermark, changing each discrete cosine transform (DCT) coefficient of the visible watermark at a transmitting end, then adding the image of each changed DCT coefficient to the DCT coefficient of video data, and transmitting the video data containing the watermark to a receiving end through a broadcast network for preview of the receiving end; interacting the receiving end with the transmitting end; erasingthe visible watermark by using a received watermark key at the receiving end by a user to recover high-quality video data; and when the visible watermark is erased, embedding digital fingerprints of the user into the video data, the visible watermark of which is erased, by the user by using the received digital fingerprint key. The broadcast signal provider only needs to broadcast the signals of the same path to all users, and the users can determine whether to purchase the higher-quality signals in a preview mode.

Description

technical field [0001] The invention belongs to the technical field of multimedia content protection, in particular to a multimedia copyright protection method that supports preview and traces unauthorized distribution in a broadcast environment. Background technique [0002] Multimedia data broadcasting can broadcast multimedia data to multiple users at one time, that is, the sender only sends one data stream, and multiple users can receive this data stream. [0003] In multimedia copyright protection, digital watermark plays an important role. Digital watermarking can be divided into two types: visible watermarking and invisible watermarking. These two types of watermarking technologies play different roles in multimedia copyright protection. [0004] The visible watermarking technology protects the copyright of multimedia data by embedding a visible watermark (such as a logo) marked with copyright information in the multimedia data. Visible watermarks can be divided int...

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): H04N21/266H04N21/254H04N21/8358H04N7/30G06F21/00G06F21/10
Inventor 戴跃伟李宏圆刘光杰翟江涛
Owner NANJING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com