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Digital video copy protection system

A technology for duplicating records and data, which is applied to the components of TV systems, digital recording/reproduction, TV, etc., and can solve the problems of inability to distinguish, verify the authenticity or legal rights of digital data, etc.

Inactive Publication Date: 2004-09-22
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Without the ability to verify the authenticity or legal rights of digital data provided by counterfeiters, disc manufacturers may inadvertently mass-produce counterfeit digital data discs
Possibility of not being able to distinguish such counterfeit discs from duly authorized retail discs copied from legitimate parent records

Method used

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  • Digital video copy protection system
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Examples

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Embodiment Construction

[0029] FIG. 1 schematically illustrates a copy protection method 100 of the present invention. According to the copy protection method 100 , an original source 102 of information is digitally recorded to produce a legal master tape 104 and a legal master disc 106 . This recording process may be performed at a broadcast station, recording studio, video reproduction facility, or the like.

[0030] Original source 102 may include audio signals, video signals, text data, digital data, etc., all of which may be encoded or compressed. For example, video signals may be processed according to the MPEG standard. Legal master 104 is preferably magnetic tape and legal master 106 is preferably a high density magneto-optical disk. Of course, each of master tape 104 and master disc 106 may be replaced by any suitable storage medium, such as semiconductor memory, magnetic disk, optical disk, or the like.

[0031] The legal master tape 104 or legal master disc 106 is provided to an optical...

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PUM

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Abstract

A formatting apparatus authenticates an information signal prior to mass duplication of the signal by analyzing the signal to detect the presence or absence of a security signal therein, inserting a security signal into the information signal, and recording the modified signal only if no security signal was detected.

Description

technical field [0001] The present invention relates to a method of protecting digital data from unauthorized mass copying. In particular, the present invention relates to a method of copy protecting digital video signals recorded on a storage medium, such as an optical disc. Background technique [0002] The recent development of consumer electronics employing devices for reproducing digitally recorded audio and video data has led to a corresponding development of a broad consumer market for digital recording media. Such digital recording media come in many different forms, including optical disks, magnetic disks, magneto-optical disks, magnetic tape, magnetic disk cartridges, and the like. Many of these forms of digital recording media are commonly available for sale or rental. In addition, consumers can also access and retrieve stored digital audio and video data from cable systems, computer networks, satellite transmission systems, and the like....

Claims

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Application Information

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IPC IPC(8): H04N5/913H04N5/926H04N7/24
CPCH04N2005/91335H04N21/4334H04N5/913H04N21/835H04N2005/91328H04N1/32149H04N21/2541H04N2005/91321H04N21/8355H04N21/4627H04N21/8358H04N5/9264G11B20/10
Inventor 田原胜己小柳秀树矢崎阳一藤波靖
Owner SONY CORP
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