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Anti-copy multi-media optical disc and its producing method

A multimedia, anti-copy technology, applied in the direction of preventing unauthorized use of memory, digital recording/reproduction, etc., can solve the problems of slow speed and low space utilization, and achieve the effect of preventing copying and strengthening management

Inactive Publication Date: 2006-06-07
BEIJING K CITY HIGH DEFINITION ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When querying data, it is necessary to start from the beginning in order, and the speed is relatively slow
As for multimedia disc files, its particularity determines that there are only dozens of files on the disc, and a large amount of space is audio and video data, so when the standard format is used to store, the space utilization rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The non-standard file system and file data are stored on the anti-copy multimedia optical disc of the present invention. The file system can be formed by modifying some or all parameters on the standard file system, so that the file system does not meet the relevant standards. Such as: do not meet the ISO standard, UDF standard, etc., and when the computer operates the disc, it must verify all the data on it. If the verification is not correct, the data will be considered illegal. Therefore, the standard file system is modified to make the data unavailable. Therefore, the content on the disc cannot be read on the computer, and error messages such as "unformatted", "no information", "inaccessible" and other error messages will be prompted. Therefore, the disc cannot be copied on a computer either.

[0017] There are many ways to modify the standard file system, as long as it is not defined according to the standard, the easiest way is to modify the content in the file al...

Embodiment 3

[0032] Other conditions are the same as in embodiment 1, except that the file system on the described multimedia disc is not obtained by modifying the standard file system, but sets out a unique file system based on the fact that the multimedia disc itself has few files, which is different from the standard file system. completely different, so computers cannot recognize it and can only be played on proprietary players that recognize the multimedia disc file system.

[0033] The file system of this embodiment can be established in many ways, for example: the boot area directly points to a file description area, and each file points to several units in the file description area, and these units will be obtained through certain calculations. The position of the file header can also separate each file with different sizes according to its attributes. If it is an audio or video data file, it can be divided into larger clusters. In this way, the storage method of the file data is c...

Embodiment 4

[0035] Other conditions are the same as in embodiment 2, just in order to prevent some data fragments from being taken out from the disc, on the basis of taking the above measures, the file data on the multimedia disc can be further encrypted, and when playing, use a proprietary player Playing after decryption further enhances the security of the disc.

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PUM

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Abstract

The present invention discloses a kind of anti-copying multimedia CD and its producing process. The multimedia CD has stored file system and file data, the file system is a non-standard file system and the file data is incomplete. The non-standard file system can not be distinguished in common computer and its data can not be processed, deciphered and copied. The incomplete file data makes them incapable of being copied, even in professional production line. The anti-copying multimedia CD may be replayed normally while preventing copying effectively.

Description

technical field [0001] The invention relates to a copy-proof multimedia optical disc, and also relates to a manufacturing method of the optical disc. Background technique [0002] At present, the content on all optical discs is written by standard methods, and the files in it can be hidden by the hidden function given by the system, and the hidden files can prevent copying; but for the entire optical disc, as long as the computer can read from Once the information is read, it can be copied as it is. [0003] Usually optical discs are managed according to the standard file system, such as ISO standard, UDF standard, etc., mainly specifying the address of the file allocation table through the boot area, and then assigning various attributes of the files stored on the optical disc in the file allocation table. Defined by the standard, the attributes here include: file name, attribute, address, space, etc., and the records of all attributes are arranged in strict definition and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/14G11B20/10
Inventor 许丰
Owner BEIJING K CITY HIGH DEFINITION ELECTRONICS TECH
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