JP2001216711A - Optical information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical information recording medium and an optical information recording medium reproducing method making impossible to reproduce the contents data when the contents data are copy recorded unfairly on a DRAW type or a re-writable type optical information recording medium. SOLUTION: This recording medium is provided with a step for detecting the track pitch of the optical information recording medium, a step for comparing the detected track pitch with a prescribed value and a step not for starting to reproduce the contents data when the detected track pitch is the prescribed value, and starting to reproduce the contents data when the detected track pitch is different from the prescribed value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a compact disc (CD) and a digital versatile disc.
The present invention relates to an optical information recording medium such as a disc (DVD: Digital Versatile Disc) and an optical information recording medium reproducing method for reproducing the optical information recording medium.

[0002]

2. Description of the Related Art At present, personal computers have become widespread and have been used not only in offices but also in ordinary households. CD-ROM (Compact) as a medium for recording programs to be executed on a personal computer
Disc Read Only Memory) is generally used.

[0003] Generally, personal computers have CD-
A CD-ROM drive for reproducing the ROM is connected. A user purchases a CD-ROM on which content data such as program data, video data, or music data for a desired computer is recorded, and enters a CD-RO.
By reproducing the content data using the M drive, it is possible to operate a computer program using a personal computer, watch a video, and listen to music.

Recently, a write-once CD (CD-R: Compact Diode), which allows a user to record data by himself, has been proposed.
sc Recordable) has been released. Currently, commercially available CD-Rs have a track pitch of 1.6 μm,
A linear velocity of 1.2 m / s at the time of reproducing the recorded data (a recording frequency of 44.1 kHz, capable of recording music data of 16-bit quantization bit for 74 minutes) and 1.4 m / s (Which can record music data having a sampling frequency of 44.1 kHz and a quantization bit number of 16 bits for 60 minutes).

[0005]

The above-mentioned CD-ROM
When a CD-R drive capable of recording content data on a CD-R in addition to a drive is connected to a personal computer, even a general user can easily use the CD-RO.
The content data recorded on M can be copied and recorded on a CD-R. Therefore, there is a possibility that the content data is illegally recorded on the CD-R and the copied content data is used without the permission of the copyright holder.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention illegally duplicates and records computer program data, video data, music data, and other content data on a write-once or rewritable optical information recording medium such as a CD-R. if you did this,
It is an object of the present invention to provide an optical information recording medium and an optical information recording medium reproducing method in which content data cannot be reproduced.

[0007]

According to a first aspect of the present invention, there is provided an optical information recording medium in which content data and a reproduction program for reproducing the content data are recorded. The program area is formed with a track pitch different from a predetermined track pitch, and the reproduction program is configured such that the track pitch of the optical information recording medium on which the content data is recorded is the predetermined track pitch. A process for not reproducing the content data when the pitch is determined.

According to a second aspect of the present invention, an optical information recording medium includes a program area in which content data and a reproduction program for reproducing the content data are recorded, wherein the content data is a predetermined line. The program area is recorded in the program area so as to be reproduced at a linear velocity different from the velocity, and the reproduction program is such that the linear velocity when reproducing the optical information recording medium on which the content data is recorded is the predetermined linear velocity. A process for not reproducing the content data when it is determined that

According to a third aspect of the present invention, in the optical information recording medium reproducing method, a step of detecting a track pitch of the optical information recording medium and a step of comparing the detected track pitch with a predetermined track pitch. When,
Starting reproduction of content data when the detected track pitch is a predetermined track pitch, and starting reproduction of content data when the detected track pitch is different from the predetermined track pitch. Features.

According to a fourth aspect of the present invention, in the optical information recording medium reproducing method, a step of detecting a linear velocity at a standard speed when reproducing the content data of the optical information recording medium; Comparing the linear velocity with a predetermined linear velocity, and when the detected linear velocity is the predetermined linear velocity, the reproduction of the content data is not started, and the detected linear velocity is different from the predetermined linear velocity. Starting the reproduction of the content data.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an optical information recording medium and an optical information recording medium reproducing method according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram illustrating a schematic configuration of one embodiment of the optical information recording medium of the present invention. In the figure, 1 is an optical information recording medium, 1B is an inner disk portion, 1C is an outer disk portion, 1D is a lead-in area, 1E is a program area, 1F is a lead-out area, 2 is file management information, 3 is a reproduction program. Reference numeral 4 denotes content data.

The optical information recording medium 1 of the present embodiment includes a lead-in area 1D, a program area 1E, and a lead-out area 1F from the disk inner peripheral portion 1B to the disk outer peripheral portion 1C. Disk management information called TOC (Table of Contents) is recorded in the lead-in area 1D, and time information of file data recorded in the program area 1E is recorded.

File management information 2 is recorded at the innermost periphery of the program area 1E. In the file management information 2, management information for executing file data recorded in the program area is recorded, and the optical information recording medium of the present embodiment firstly executes a reproduction program 3 described later. Have information.

The reproduction program 3 includes content data 4
This is the program data for reproducing. The details of the reproduction program 3 will be described later. The content data 4 is, for example, computer program data, video data, or music data.

In the lead-out area 1F, data indicating the end of the program area 1E is recorded.

The track pitch of the optical information recording medium 1 of this embodiment is set to a value different from the track pitch of 1.6 μm used in CD-R, for example, 1.5 μm. This value can be identified by a track pitch detection method described later if there is a track pitch difference of 0.1 μm, and the influence of crosstalk from an adjacent track is small if the track pitch is 1.5 μm. I chose from that. In addition, the standard linear velocity (determined at the time of manufacturing the disc) when reproducing the content data recorded on the optical information recording medium 1 of the present embodiment is 1.2 m / s used in CD-R or A linear velocity different from 1.4 m / s, for example, 1.3 m / s.

Next, a method of reproducing the optical information recording medium of this embodiment by a personal computer connected to a disk drive will be described. FIG. 2 is a flowchart for explaining a first embodiment of the optical information recording medium reproducing method of the present invention. The optical information recording medium 1 of this embodiment is mounted on a disk drive connected to a personal computer (step S1). The disk drive is an optical information recording medium 1
Is rotated to move the optical pickup to the lead-in area 1D, and the TO recorded in the lead-in area 1D is
The C information is read, and the start position of the program area 1E is detected. The disk drive moves the optical pickup to the head position of the program area 1E, reads the file management information 2, detects that the file to be read first is the reproduction program 3, and reads the data of the reproduction program 3 (step S2). ).

The disk drive outputs the read data of the reproduction program 3 to the control unit of the personal computer. The control unit of the personal computer outputs an instruction signal for causing the disk drive to detect the track pitch of the optical information recording medium 1 based on the reproduction program 3.

The disk drive controls the optical pickup and turns off the tracking servo while keeping the focus servo on. The disk drive moves the optical pickup by a predetermined distance in the radial direction of the optical information recording medium, and outputs a tracking error signal generated during the movement to a control unit of the personal computer. The control unit calculates the number of tracks crossed by the optical pickup from the input tracking error signal, and detects the track pitch from the number of tracks and the distance moved by the optical pickup (step S3).

The control unit of the personal computer compares the detected track pitch of the optical information recording medium 1 (1.5 μm in this embodiment) with a value (1.6 μm) predetermined in the reproduction program 3 (step). S4).

The control unit determines that the detected track pitch of the optical information recording medium 1 is different from the predetermined track pitch, and controls the disk drive to start reproduction of the content data 4 (step S5).

Next, a CD-ROM in which the TOC information, the file management information 2, the reproduction program 3, and the content data 4 recorded on the optical information recording medium 1 of this embodiment are duplicated and recorded.
A case where R is reproduced will be described. The track pitch of the CD-R is 1.6 μm. Steps S1 to S3 in FIG. 2 are the same as those in the case where the optical information recording medium 1 is reproduced, and thus the description is omitted.

In step S4 in FIG. 2, the control unit of the personal computer compares the detected track pitch of the CD-R (1.6 μm) with a value (1.6 μm) predetermined in the reproduction program 3.

The control section determines that the detected track pitch of the optical information recording medium 1 is the same as a predetermined track pitch, and controls the disk drive so as not to start reproducing the content data 4 (step S6). ).

FIG. 3 is a flowchart for explaining a second embodiment of the optical information recording medium reproducing method of the present invention. The optical information recording medium 1 of this embodiment is mounted on a disk drive connected to a personal computer (step S1).
1). The disk drive rotates the optical information recording medium 1, moves the optical pickup to the lead-in area 1D, reads the TOC information recorded in the lead-in area 1D, and detects the start position of the program area 1E. The disk drive moves the optical pickup to the head position of the program area 1E, and the file management information 2
Is read, and it is detected that the file to be read first is the reproduction program 3, and the data of the reproduction program 3 is read (step S12).

The disk drive outputs the read data of the reproduction program 3 to the control unit of the personal computer. The control unit of the personal computer outputs an instruction signal for causing the disk drive to detect the track pitch of the optical information recording medium 1 based on the reproduction program 3.

The disk drive outputs a rotation synchronizing signal output from the servo circuit to the control section of the personal computer when the reproduction program is being reproduced. The control unit detects a standard linear velocity when reproducing the content data recorded on the optical information recording medium 1 from the input rotation synchronization signal (step S13).

The control section of the personal computer detects the detected linear velocity of the optical information recording medium 1 (1.22 in this embodiment).
m / s) and the linear velocity values (1.2 m / s and 1.4 m / s) predetermined in the reproduction program 3 are compared (step S14).

The control unit determines that the detected value of the linear velocity of the optical information recording medium 1 is different from a predetermined value of the linear velocity, and controls the disk drive to start the reproduction of the content data 4 ( Step S15).

Next, a CD-ROM in which the TOC information, the file management information 2, the reproduction program 3, and the content data 4 recorded on the optical information recording medium 1 of the present embodiment are duplicated and recorded.
A case where R is reproduced will be described. The linear velocity of the CD-R is 1.2 m / s or 1.4 m / s. Steps S11 to S13 in FIG. 3 are the same as those in the case where the optical information recording medium 1 is reproduced, and thus the description is omitted.

In step S14 of FIG. 3, the control unit of the personal computer determines the linear velocity (for example, 1.4 m / s) of the detected CD-R and a value (1.2 m / s) predetermined in the reproduction program 3. And 1.4 m / s).

The control unit determines that the detected value of the standard linear velocity of the optical information recording medium 1 is the same as the predetermined value of the linear velocity, and determines that the reproduction of the content data 4 is not started. Is controlled (step S6).

As described above, in the first embodiment and the second embodiment of the optical information recording medium reproducing method of the present invention, the optical information recording medium 1
The reproduction program 2 is recorded in the program area 1E, but the reproduction program 2 is stored in a memory or the like built in the personal computer so that the reproduction program is executed first when the optical information recording medium 1 is reproduced. It may be. Further, in the above embodiment, the case where the disk drive is connected to the personal computer has been described, but a game machine or the like having a built-in CD-ROM drive may be used.

[0034]

According to the present invention, when content data such as computer program data, video data or music data is illegally copied and recorded on a recordable or rewritable optical information recording medium such as a CD-R, An optical information recording medium and an optical information recording medium reproducing method for preventing data from being reproduced can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a schematic configuration of an optical information recording medium according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a first embodiment of an optical information recording medium reproducing method according to the present invention.

FIG. 3 is a flowchart for explaining a second embodiment of the optical information recording medium reproducing method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical information recording medium 1B Inner part of disk 1C Outer part of disk 1D Lead-in area 1E File management information 1F Lead-out area 2 File management information 3 Playback program 4 Content data

Claims (4)

[Claims] A program area for recording content data and a reproduction program for reproducing the content data, wherein the program area is formed at a track pitch different from a predetermined track pitch; An optical information recording medium comprising a process of not reproducing the content data when it is determined that the track pitch of the optical information recording medium on which the content data is recorded is the predetermined track pitch. 2. A program area in which content data and a reproduction program for reproducing the content data are recorded, wherein the content area is reproduced at a linear velocity different from a predetermined linear velocity. The reproduction program is provided with a process of not reproducing the content data when it is determined that the linear velocity when reproducing the optical information recording medium on which the content data is recorded is the predetermined linear velocity. An optical information recording medium characterized by the above-mentioned. Detecting the track pitch of the optical information recording medium; comparing the detected track pitch with a predetermined track pitch; and detecting the detected track pitch with a predetermined track pitch. Starting the reproduction of the content data when the detected track pitch is different from the predetermined track pitch without starting the reproduction of the content data. 4. A step of detecting a linear velocity at a standard velocity when reproducing content data of an optical information recording medium; a step of comparing the detected linear velocity with a predetermined linear velocity; Starting playback of content data when the speed is a predetermined linear speed, and starting playback of content data when the detected linear speed is different from the predetermined linear speed. An optical information recording medium reproducing method.