Digital television timing charging and copyright protecting method based on watermarks

Abstract

The invention discloses a digital television timing charging and copyright protecting method based on watermarks. The digital television timing charging and copyright protecting method comprises the following steps: 1) recording the starting time that a user watches a digital television and the program information; 2) reading a PDK (PERL Development Kit) in a smart card by virtue of a bidirectional set top box, enabling the PDK to generate watermark signals, and carrying out the error correction of coding on the watermark signals; 3) enabling the watermark signals processed by the error correction of coding through a decoder at the time of decoding into the middle-low frequency DCT coefficients of an I frame luminance component after the I frame is researched, and then outputting and playing the middle-low frequency DCT coefficients; 4) billing the digital television by hours through a user management system; 5) extracting watermarks of suspended illegal videos when the suspended illegal videos are played in the program of the digital television, and determining the copyright by utilizing the extracted watermark signals, and further judging the user illegally spreading programs of the digital television. The digital television timing charging and copyright protecting method disclosed by the invention has the advantages of novel and reasonable design, simplicity in operation, low cost, high accuracy in timing charging, and high popularization and application value, and also has the advantage that the source of the copyright infringement can be tracked. The digital television timing charging and copyright protecting method is suitable for the popularization and development of the digital television.

Description

technical field [0001] The invention belongs to the field of digital television broadcasting, in particular to a watermark-based digital television timing charging and copyright protection method. Background technique [0002] Digital TV has been popularized in major cities, and analog TV will eventually be replaced by digital TV. At present, the charging method of digital TV is mainly a monthly subscription fee. Under this charging method, no matter whether the user watches for only a few minutes or hundreds of hours, he or she has to pay the same viewing fee. This one-size-fits-all charging method is unreasonable for users who spend less time watching TV, and it also creates obstacles for operators to formulate flexible marketing plans, which affects the popularization and development of digital TV. In addition, operators are also facing a new important problem - copyright protection while vigorously promoting digital TV. Legal digital TV users can record and illegally ...

AI Technical Summary

Problems solved by technology

[0003] Digital watermarking technology is currently the most effective method of copyright protection. At present, most watermarking technologies for digital TV copyright protection are to embed watermarks before video programs are sent. Although copyright protection can be carried out in this way, the source of piracy cannot be tracked and curbed. root of piracy

The Chinese invention patent with application number 200710013548.X discloses a program monitoring and management system based on digital watermark and two-way set-top box, which can protect the copyright of digital TV, but cannot charge by time

Images