KR20050069562A - Method for copy protection in digital complex recorder - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of preventing copy recording in a digital composite recorder. In a digital composite recorder in which a DVD recorder, a hard disk recorder, and the like are integrated, a program read or reproduced from an optical disk when a copy operation is requested, or a hard disk is requested. By retrieving navigation information corresponding to a file read out and reproduced from the disc and referring to the copy protection information recorded in the navigation information, by performing or selectively stopping a copy recording operation, the hard disk of the digital composite recorder It is a very useful invention that various files stored in or various programs stored in an optical disc can be effectively prevented from being illegally copied by an internal copy recording operation.

Description

How to prevent copy recording in a digital composite recorder {Method for copy protection in digital complex recorder}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of preventing copy recording in a digital composite recorder. For example, the present invention relates to an internal copy recording operation in a digital composite recorder in which a DVD recorder, a hard disk recorder, and the like are integrated. The present invention relates to a method of preventing copy writing in a digital composite recorder to prevent any file or programs from being copied without permission.

Recently, a digital composite recorder integrated with a DVD recorder and a hard disk recorder has been developed and commercialized. As illustrated in FIG. 1, the digital composite recorder 200 may be connected to a television 400. The DVD player 100 may be connected to the DVD recorder 300 or the like.

Meanwhile, as shown in FIG. 2, the digital composite recorder 200 includes an optical disc 20, an optical pickup 21, a VDR (Video Disc Record) system 22, a hard disc 23, and an HDR (HDD). Record) system 24, microcomputer 25, and memory 26 may be configured to include.

In addition, the microcomputer 25 operates and controls the HDR system 24 in response to a user's request to read and reproduce any file recorded on the hard disk 23 or to play the VDR system 22. Operation control is performed to read out and reproduce any program recorded on the optical disc 20, and then transmit the output data stream to the DVD recorder 300.

On the other hand, in the microcomputer 25, in order to prevent the reproduction data stream transmitted and output as described above from being copied illegally by the DVD recorder 300, copy protection information (CGMS) previously prescribed. System) is transmitted along with the playback data stream.

Since the DVD recorder 300 does not copy and record a reproduction data stream to the optical disc with reference to the copy protection information, a specific file or a specific program whose copying is prohibited for copyright protection or the like is stored on an external device. It is possible to prevent illegal copying.

In addition, when the DVD player 100 transmits and outputs a data stream of a specific program read and reproduced from an optical disc inserted and seated in the device, to the digital composite recorder 200 according to a user's request, Similarly, copy protection information CGMS is transmitted together with the reproduction data stream.

Since the digital composite recorder 200 does not copy and record a reproduction data stream to an optical disk or a hard disk with reference to the copy protection information, a specific program for which copy recording is prohibited for copyright protection or the like is used. It is possible to prevent illegal copying by the recorder.

However, in a general digital composite recorder, when a specific file of the hard disk 23 included in the device is recorded on the optical disk 20 or when a specific program of the optical disk 20 is recorded on the hard disk 23, Since the copy protection information is not generated separately, the user with the digital composite recorder illegally copies and records a specific file recorded on the hard disk onto an optical disk, or illegally copies a specific program recorded on the optical disk onto a hard disk. There is a problem in that copy recording is possible.

Accordingly, the present invention has been made to solve the above problems, and includes navigation files corresponding to a specific file of a hard disk or a specific program of an optical disk provided in a digital composite recorder. In addition to additionally recording copy protection information, when an internal copy recording operation is requested, copying from a digital compound recorder for retrieving the copy protection information to prevent unauthorized copying of a specific file or program that is prohibited from copying is performed. Its purpose is to provide a record protection method.

In the digital composite recorder according to the present invention for achieving the above object, the copy recording prevention method, in the digital composite recorder, when the internal copy recording operation is requested, copy protection to the navigation information corresponding to the playback program or playback file; Step 1 of checking whether information is recorded; And two steps of selectively stopping the copy recording operation according to the confirmation result.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a preferred embodiment of a method of preventing copy recording in a digital composite recorder according to the present invention will be described in detail with reference to the accompanying drawings.

First, the copy recording prevention method according to the present invention can be applied to a digital composite recorder configured as described above with reference to FIG. 2, for example, as shown in FIG. Among the storage-managed navigation information, the file allocation table (FAT) information includes a copy for identifying whether the file is a no-copy file or a free-copy file. Prevention information (CGMS_Info.) Is recorded and included.

In addition, as shown in FIG. 4, among the navigation information stored and managed on the optical disc 20, program information (PGI: Program Information) includes whether or not the program is a copy-protected program (No-Copy). Copy protection information (CGMS_Info.) For identifying whether the program is a (Free-Copy) program is recorded.

The microcomputer 25 allocates the file when an internal copy recording operation is requested by a user, for example, when an internal copy recording operation for a specific file recorded on the hard disk 23 is requested. In addition to retrieving the table (FAT) information, the copy protection information (CGMS_Info) recorded in the file allocation table information is checked to perform a copy write operation or to selectively stop the copy write operation.

When an internal copy recording operation for a specific program recorded on the optical disc 20 is requested, the program information PGI is searched and the copy protection information CGMS_Info included in the program information is checked. In this case, the copy write operation is performed or the copy write operation is selectively stopped. This will be described in detail below.

5 is a flowchart illustrating a method of preventing copy recording in a digital composite recorder according to the present invention. For example, the microcomputer 25 operates the HDR system 24 at the request of a user. Control to read and reproduce the file recorded on the hard disk 23, or perform operation control of the VDR system 22 to perform a series of data reproducing operations to read and reproduce the program recorded on the optical disk 20 It is made (S10).

On the other hand, in the microcomputer 25, when the above data reproduction operation is performed and an internal copy recording operation is requested (S11), file allocation table (FAT) information for a specific file being reproduced from the hard disk is requested. In addition to checking the " CGMS " recorded in the file allocation table information, the program information " PGI " Check the copy protection information (CGMS) recorded in the.

When the copy protection information has a value corresponding to No-Copy (S13), the specific file reproduced from the hard disk is not recorded on the optical disk or specified to be reproduced from the optical disk. In the state where the program is not recorded on the hard disk, as shown in Fig. 6, a message indicating the copy impossible is outputted (S14).

On the other hand, when the copy protection information has a value corresponding to free-copy, a specific file played back from the hard disk is recorded on the optical disk or a specific program played back from the optical disk, A series of copy and write operations for writing to the hard disk are normally performed (S15).

On the other hand, when the above internal copy recording operation is not requested, the microcomputer 25 outputs copy protection information (CGMS) to an external device together with a data stream read and reproduced from the hard disk or optical disk. The playback operation is performed (S16).

 Accordingly, it is possible to prevent the user from illegally copying a specific file or program that is prohibited from copying by using a digital composite recorder. The method of preventing copy writing according to the present invention is as described above. The present invention can be applied to various composite devices other than the digital composite recorder configured.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

In the digital composite recorder according to the present invention, which is constructed and configured as described above, in a digital composite recorder in which a DVD recorder, a hard disk recorder, and the like are integrated, an internal copy recording operation is read and reproduced when an internal copy recording operation is requested. By searching the navigation information corresponding to the program or the file to be read and reproduced from the hard disk, and by referring to the copy protection information recorded in the navigation information, the copy recording operation is performed or optionally stopped, so as to perform a digital composite. Various files stored on the hard disk of the recorder, or various programs stored on the optical disk, are very useful inventions that can effectively prevent unauthorized copying by the internal copy recording operation.

FIG. 1 is a view illustrating a general digital composite recorder connected to a DVD player, a DVD recorder, and a television.

2 illustrates a configuration of a general digital composite recorder.

3 illustrates a state in which copy protection information is recorded in a file allocation table (FAT) information of a hard disk according to the present invention;

4 shows a state in which copy protection information is included and recorded in program information of an optical disc according to the present invention;

5 is a flowchart illustrating an operation of a method of preventing copy recording in a digital composite recorder according to the present invention;

6 illustrates a screen of a copy impossible guide message that is output and displayed according to the present invention.

※ Explanation of code for main part of drawing

100: DVD player 200: digital composite recorder

300: DVD Recorder 400: Television

20: optical disc 21: optical pickup

22: VDR System 23: Hard Disk

24: HDR system 25: micom

26 memory

Claims (5)

In the digital composite recorder, when an internal copy recording operation is requested, checking whether copy protection information is recorded in navigation information corresponding to the playback program or playback file; And And two steps of selectively stopping the copy recording operation according to the verification result. The method of claim 1, And the copy protection information is recorded in the file allocation table (FAT) information of the hard disk or recorded in the program information of the optical disk. The method of claim 1, In the second step, when the checked copy protection information is recorded as a free copy value, copying of the playback program or playback file to a hard disk or an optical disk is performed. How to prevent writing. The method of claim 1, In the second step, when the checked copy protection information is recorded as a No Copy value, the copy recording operation for the reproduction program or the reproduction file is stopped, and a message for notifying the copy is output. A copy recording preventing method in a digital composite recorder, characterized in that for displaying. The method of claim 1, And the digital composite recorder is integrated with a DVD recorder and a hard disk recorder.