JPH0831080A - Digital disk recording method and its recording/ reproducing device - Google Patents

Abstract

PURPOSE:To provide a digital disk recording/reproducing device capable of preventing unjust copying and acquiring unjust copying information by also recording required additional information related to recording together with program memory(PMA) information on the PMA area of a disk. CONSTITUTION:The additional information of one or more such as a manufacturning nations name, a manufacture's name, a type number, etc., of a recorder at a recording time together with the PMA information are recorded on the PMA area to which no access is performed at a reproducing time inside the read-in area of the disk when the disk is recorded. The unjust copying such as grandchild copying, etc., is prevented based on the additional information, and a digital disk recording method and its recording/reproducing device capable of acquiring the unjust copying information even when the unjust copying is performed are obtained, and an infringement of copyright, etc., is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital disk recording method and a recording / reproducing apparatus thereof, and more particularly to a digital disk recording method and a recording / reproducing apparatus thereof having an enhanced copyright protection function.

[0002]

2. Description of the Related Art A CD-WO (Write Onc) added with a function of limiting a recording operation to a recording medium in a recording / reproducing apparatus of a digital disk from the viewpoint of copyright protection.
e) Devices or CD-R devices have been widely put into practical use.
This function is compatible with the serial copy management system (S
CMS), but in recent years, devices that release the prohibition function of this SCMS have appeared on the market, making it possible to make grandchild copies that would otherwise be impossible.

By the way, in the CD-WO, PMA information regarding recording such as a track number and a start and end time is written in a program memory area (PMA) for each recording on a disc, but this area is copyright protected. There is no way of using it from the viewpoint of.

[0003]

[Problems to be Solved by the Invention]

Therefore, an object of the present invention is to use a PMA to prevent unauthorized copying such as grandchild copying, and to obtain information about the unauthorized copying even if the unauthorized copying should occur. It is to provide a recording method and a recording / reproducing apparatus thereof.

[0005]

In order to solve the above-mentioned problems, a digital disk recording method according to the present invention is a program memory area (PMA) for recording a track number, start and end times, etc. for each recording on a disk. In a digital disc recording method in which information is written in a program memory area (PMA), at least one of a country of manufacture, a manufacturer's name, and a model number of a recording device at the time of recording is recorded as additional information in the PMA. Has been done.

Further, the digital disc recording / reproducing apparatus according to the present invention is a digital disc recording / reproducing apparatus in which PMA information regarding recording such as a track number and a start and end time is written in the PMA for each recording on the disc. The PMA is configured to record at least one piece of information of a manufacturing country name, a manufacturer name, and a model number of the recording device as additional information.

Here, the PMA information and the additional information are recorded in the PMA for each recording, and the additional information is recorded at the start of the recording and the PMA information of the disc is recorded at the time of ejection from the tray. Further, the PMA information is recorded at the end of the recording, the additional information is recorded on the PMA when the disc is ejected from the tray, the recording is completed, and the PMA information is recorded when the disc is ejected from the tray. PMA information and additional information can also be recorded in the PMA. Further, as the additional information, time information other than the above may be added.

[0008]

According to the present invention, the PMA information relating to recording such as the track number and the time is recorded in the PMA for each recording on the disc, such as the country name, manufacturer name, model number, etc. of the recording device at the time of recording in the digital disc recording / reproducing device. By recording at least one of these pieces of information in the PMA as additional information, even if an illegal copy is made, information about the illegal copy can be acquired after the fact. For example, regarding the recording of the manufacturing country name, manufacturer name, model number, etc. of the device at the time of recording in the program memory area (PMA) for writing partial recording information on the disc such as the relationship between the track number TNO and the start and end times. By recording the additional information, it is possible to confirm the fact of illegal copying.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The following description of an embodiment of the invention is for a CD-WO device. As shown in FIG. 2, the recording area of a normal CD-WO disc is a power calibration in which information for obtaining an accurate and proper recording power is written on the disc from the inside of the disc in the radial direction. Area (PCA) # 1, TN as above
Program memory area (PMA) # 2 in which partially recorded disc information such as the relationship between O and start and end times, a lead-in area # 3 in which TOC (Table of Contents) is written, and music data are written. There are defined a program memory area # 4 to be written and a lead-out area # 5 to which information indicating the end of the program memory area is written.

The PMA is an area that functions as a temporary TOC for temporarily recording information in the recording area during recording.
The contents of TOC are comprehensively determined by referring to the recorded contents of PMA. The PMA has a subcode Q as shown in FIG.
It is defined as the channel format, and S
0, S1 is start, CONT is control information, ADR is a value that determines the type of information, TNO is a track number, and hereinafter, POINT, MIN, SEC, FR.
AME, ZERO, PMIN, PSEC, PFRAM
The information corresponding to each area of E and CRC is specified, and the information to be recorded is specified. Usually ADR
Is predetermined from "1" to "6", and each value defines the information content recorded in another area.

During playback, the playback-only CD device starts access from the lead-in area # 3 and does not access the PMA. Therefore, the recorded contents of the PMA have no influence on the normal reproduction operation. Therefore, in the present invention, the additional information regarding the apparatus at the time of copying (recording) is recorded in the PMA even for illegal copying. That is, for each partial recording on the disc, as shown in FIG. 1, the disc information (for example, TNO.
(3, start time 15 minutes 43 seconds, 28 complaints, etc.), and further, the additional information at the time of recording the disc is also paired and recorded in the format of the subcode Q channel of FIG. To do. For example, ADR =
7 as the additional information format, POINT = country code, MIN = recorder manufacturer code, SEC = recorder code, FRAME = serial NO. , PMIN = recording year, PSEC = recording month, and PFRAME = recording date are recorded in predetermined areas. Furthermore, the user code and the like can be recorded in an appropriate area.

A specific method for recording and writing the PMA information and the additional information in the PMA will be described below.

FIG. 4 is a flow chart showing the processing procedure of the first embodiment, which is an example of writing PMA information and additional information when recording is stopped. In FIG. 4, recording is started, the recording operation is executed (step S1), and it is determined whether or not there is a recording operation stop command (step S2). After waiting for the determination of the recording operation stop command, the PMA information is written to the PMA (step S3), the additional information is written to the PMA (step S4), and the process ends. The arrangement relationship of the information written in the PMA in this way is shown in FIG. After each recording, PMA information is written in the PMA, and then the additional information is written, and the additional information valid P
MA information will be written.

FIG. 6 is a flow chart showing the processing procedure of the second embodiment, in which additional information is written in the PMA before the start of recording and the disc is taken out (when the tray is opened).
This is an example of writing PMA information to the. In FIG. 6, at the start of recording, the additional information is first written in the PMA (step S11), and the end of the recording operation is waited (step S1).
2) It is determined whether there is a recording stop command (step S1).
3). If it is judged that there is a recording stop command, then
It is determined whether or not there is a tray open command (step S1).
4) If it is determined that there is an open command, the PMA information is recorded in the PMA (step S15), and then the tray is opened (step S16). An example of the arrangement of the information written in the PMA in this way is shown in FIG. In this example, the additional information is written at the start of recording, and then the PMA information until the tray open command is input is the PMA information.
Will be written in.

FIG. 8 is a flow chart showing the processing procedure of the third embodiment. In this example, PMA information is written in the PMA each time recording is stopped, but additional information is written at the time of ejecting the disc by the tray open command. . In FIG. 8, recording is started and the recording operation is executed (step S
21), waiting for the input of the recording stop command (step S2
2), PMA information is written to PMA (step S
23). Then, it is judged whether or not there is a tray open command (step S24). If there is no tray open command, the process returns to step S21 and the recording process is executed. If there is, additional information is written in the PMA (step S25) and the tray is opened. (Step S26). An example of the arrangement of the information written in the PMA in this way is shown in FIG. In this example, the PMA information corresponding to the recording is written in the PMA for each partial recording, and the additional information is written when the tray open command, which is the time when the recording on the same disc is completed several times, is received. PMA will be effectively utilized.

FIG. 10 shows the processing procedure of the fourth embodiment. The difference from FIG. 8 is that when the tray open command is received (step S24), the PMA information and the additional information are collected together. Write to (steps S23, S2
5) It is a point.

In the above embodiment, if the subcode Q channel format is used for the additional information format to be recorded, the correspondence between each area and the code can be set arbitrarily. Further, the content of the additional information is not limited to the above-mentioned information, but may be any information that can grasp illegal copying and the like.

[0018]

As described above, in the recording method and the recording / reproducing apparatus according to the present invention, during reproduction of the CD system, a predetermined recording-related addition is made to the PMA located inside the lead-in area which is not accessed. Since the information is recorded, it does not affect the operation of the CD system,
The facts and information such as illegal copying can be easily known, and it becomes possible to further strengthen the copyright protection.

[Brief description of drawings]

FIG. 1 is a diagram showing an arrangement relationship between PMA information and additional information recorded in a PMA according to the present invention.

FIG. 2 is an information layout diagram of a recording area of a normal CD-WO disc.

FIG. 3 is an information layout diagram in PMA.

FIG. 4 is a flowchart showing a processing procedure of the first embodiment of the present invention.

5 is an information layout diagram of PMA in the embodiment shown in FIG. 4;

FIG. 6 is a flowchart showing a processing procedure of a second embodiment of the present invention.

7 is an information layout diagram of PMA in the embodiment shown in FIG. 6;

FIG. 8 is a flowchart showing a processing procedure of a third embodiment of the present invention.

9 is an information layout diagram of PMA in the embodiment shown in FIG. 8;

FIG. 10 is a flowchart showing a processing procedure of a fourth embodiment of the present invention.

[Explanation of symbols]

 # 1 PCA (power calibration area) # 2 PMA (program memory area) # 3 lead-in area # 4 program memory area # 5 lead-out area

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Claims (7)

[Claims] 1. A digital disc recording method in which program memory area (PMA) information relating to recording, such as a track number and start and end times, is written in the program memory area (PMA) every time recording is performed on the disc. A digital disk recording method, characterized in that at least one piece of information of a country of manufacture, a manufacturer name, and a model number of an apparatus is recorded as additional information in the PMA. 2. A program memory area (PMA) information relating to recording such as a track number and start and start and end times for each recording on the disc is a program memory area (P
A digital disk recording / reproducing apparatus for writing into a digital disk recording / reproducing apparatus, characterized in that at least one of a manufacturing country name, a manufacturer name, and a model number of the recording apparatus at the time of recording is recorded as additional information in the PMA. Playback device. 3. The digital disk recording / reproducing apparatus according to claim 2, wherein the PMA information and the additional information are recorded in the PMA for each recording. 4. The digital disc recording / reproducing apparatus according to claim 2, wherein the additional information is recorded in the PMA when the recording is started, and the PMA information of the disc is recorded when the disc is ejected from the tray. 5. The digital disc recording / reproducing apparatus according to claim 2, wherein the PMA information is recorded at the end of the recording, and the additional information is recorded at the PMA when the disc is ejected from a tray. 6. When the recording is completed and the disc is ejected from the tray, the PMA information and the additional information are recorded in the PM.
The digital disc recording / reproducing apparatus according to claim 2, wherein the recording is performed on A. 7. The digital disc recording / reproducing apparatus according to claim 2, wherein time information is added as the additional information.