JPH1091534A - Password reset method using disk and its disk system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reset a stored password through the use of a specified disk by permitting the resetting of the password recorded in a disk system when reset data is decided to be recorded in the disk. SOLUTION: A deck part 33 reads the signal from the specified recording position of the loaded disk by using an optical pickup by the control of a system controller 32 corresponding to the key signal from a key input part 31. A signal processing part 34 reproduces the signal which is read. The system controller 32 judges whether the signal reproduced through the signal processing part 34 is reset data given only to a hearing disk or not. When the loaded disk is judged to be the hearing disk, the system controller 32 controls an OSD part 35 and displays a 'MENU' screen on a monitor 36. Thus, the password is set to a state where it can be changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital versatile disc (DVD) system, and more particularly, to a method of resetting a stored password for changing a password and a disk system thereof.

[0002]

2. Description of the Related Art DVDs have attracted attention as next-generation recording media that replace existing video tapes and CDs. DVD
Can store a larger amount of data than a CD, and the DVD system provides various functions that cannot be found in existing recording media. For example, a video area (DVD video zone) according to the DVD-video format is divided into video title areas (VTS # 1 to VTS # N), and a parental management information table (Parental Management Information) is included in this area.
Information Table: PLT_MAIT) to determine the grade of a movie. If you register your parental level,
The DVD system reproduces only scenes below a set level during video reproduction. Therefore, in a family with children, it is possible to specify a grade for the violence and sensationality of the movie so that children do not see harmful scenes.

A general method of registering a parental level will be described with reference to the flowcharts of FIGS. 1 and 2 and FIG. FIG. 3 is a state diagram of the OSD screen provided to the user at each stage of FIGS.

If the user selects the "parental level registration" mode in step 111, the DVD system displays a screen like "OSD1" in FIG. 3 on the monitor, and the current mode is the parental level registration mode. Indicates that there is. Then, it is determined whether a password other than '0000' is stored. If it is determined that the stored password exists, a message asking whether to change the stored password is displayed on the monitor in step 112. If the user inputs a key signal not to change the password, step 11
In step 3, the OSD 4 screen shown in FIG. 3 is displayed, and the stored password is input. If a password is input by the user, it is determined in step 114 whether the input password matches the stored password.

[0005] If it is determined in step 114 that the two passwords are the same, that is, if it is determined that the user is qualified to change the parental level, in step 115, the "OSD2" of FIG. Display a list of country codes like Perceptions of the violence and sensationality of movies generally vary from country to country, so before deciding on a parental level, let them decide which country's standards are appropriate. When a user inputs a country code, the input country code is stored in a corresponding system parameter. Thereafter, in step 116, a level list such as 'OSD3' of FIG. 3 is displayed. 'OSD3' is an example of a case where the level is normally classified into eight levels. When a signal for selecting a level is input from the user, the input level is stored in a corresponding parameter of the system parameters.

If it is determined in step 111 that a password other than '0000' is not stored, the parental level is registered first. On this occasion,
The DVD system performs step 117 to execute the 'OS
Display the D4 'screen on the monitor. If the user inputs a password, step 118 is performed to store the input password, and then step 115 is performed.

On the other hand, if the user inputs a key signal to change the password in step 112, the DV
The D system outputs a message requesting reset data to reset the password stored in step 119. Then, in step 120, it is determined whether reset data has been input. If it is determined in step 120 that the reset data has been input, a screen such as 'OSD4' of FIG. 3 is displayed in step 121 in order to input a new password desired by the user. If the user inputs a new password, step 118 is performed.

If it is determined in step 114 that the input password does not match the stored password, step 122 is performed to display an error message such as 'OSD5' in FIG.

When registering a parental level as described above, generally, a password that is known only to the registrant is used. However, if the registrant forgets the password or loses the password to another person, the level cannot be changed.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for resetting a stored password using a specific disk. is there. It is another object of the present invention to provide a disk system embodying the above method.

[0011]

According to the present invention, there is provided a password resetting method using an optical disk according to the present invention, comprising the steps of: (a) resetting a password of a specific disk; Requesting reproduction; (b) determining whether reset data is recorded on a disk to be reproduced in response to the request of step (a); and (c) recording reset data in step (b). Permitting the reset of the password recorded in the disk system if it is determined that the password has been set.

According to another aspect of the present invention, a disk system includes a display, a key input unit, a reproducing unit for reproducing a signal recorded on a loaded disk, and a control unit. Means for requesting reproduction of a specific disk in response to a password reset request signal passed through the key input unit, and when reset data is recorded on the disk reproduced by the reproduction means in response to the request, a disk system Resetting of the password stored in the server is permitted.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the present invention will be described in detail. The present invention is shown in FIG.
Proposes a method of using a disk in a portion indicated by a dotted line, that is, a portion for resetting a stored password. Here, when purchasing a DVD system, a disk used for trial listening (demo) is used. This is convenient because it is not necessary to purchase a disk separately to reset the password. For this reason, when producing a trial disk, specific data distinguished from a disk manufactured by another company and other commercial disks is recorded, and a desired operation is performed only when the trial disk is used. I do.

FIG. 4D illustrates a preferred embodiment of the present invention.
The VD system includes a key input unit 31 including a remote controller and a key matrix. The optical pickup includes an optical pickup for picking up a signal from a disc, and includes a deck section 33 and a signal processing section 34 for reproducing a signal picked up from the optical pickup of the deck section 33. On the other hand, the key input section 31 has a deck section 33 and a signal processing section 34 in accordance with a key signal from the key input section 31.
Is connected to the system controller 32 which controls the system. An OSD unit 35 for generating OSD characters to be displayed on a monitor 36 under the control of the system controller 32 is connected to the system controller 32.

The operation of the apparatus of FIG. 4 configured as described above will be described in more detail with reference to FIGS.
FIG. 5 is a flowchart illustrating a password reset operation according to the present invention, and FIG. 6 is a state diagram of an OSD screen provided to a user in each step of FIG.

An example in which a binary bit value of '1111' is set as reset data in 13 to 15 bytes of a VMGI_MAT area of a sample disk of Samsung Electronics Co., Ltd. for use will be described below. The method for resetting the password using such a trial listening disk is as follows.

In step 112 of FIG.
When a key signal requesting a password change is input through the system controller 32, the system controller 32 controls the OSD unit 35 to display a screen like “OSD6” in FIG.
6 is displayed (step 410). According to the guidance phrase displayed on the monitor 36 in step 410, the user operates the key input unit 31 to load the trial listening disk into the deck unit 33 and then play the disk. Key input unit 31
Under the control of the system controller 32 in response to the key signal from the CPU, the deck unit 33 reads out a signal from a specific recording position of the loaded disk by using an optical pickup (not shown). Here, the signal is read out from the password change chapter (chapter) in which the reset data is recorded, that is, the VMGI_MAT area described above. The signal processing unit 34 reproduces the signal read through the deck unit 33. The system controller 32 includes the signal processing unit 3
Then, it is determined whether or not the signal reproduced through step 4 is reset data provided only to a trial listening disk manufactured by Samsung Electronics Co., Ltd. (step 420). System controller 32
If the binary bit value of the signal reproduced from the 13th to 15th bytes of the VMGI_MAT area is "1111", it is determined that the disk is a sample disk for Samsung Electronics Co., Ltd.
If it is determined that the loaded disc is a trial disc manufactured by Samsung Electronics Co., Ltd., the system controller 3
2 controls the OSD unit 35 to display the 'MENU' screen of FIG. 6 on the monitor 36 so that the password can be changed. Thereafter, the user is prompted to select a "change password" item on the menu screen (step 430). If the user selects the “change password” item through the key input unit 31, the system controller 3
2 resets the password stored in the system memory (not shown) to input a new password (step 440). Then, the OSD unit 35 is controlled to display a screen such as 'OSD4' of FIG. 3 on the monitor 36 (step 450). At this time, the user inputs a desired password through the key input unit 31. The system controller 32 performs step 118 to store the input password in a system memory (not shown).

[0018]

As described above, the present invention can provide a method of resetting a password using a disk and a disk system thereof.

[Brief description of the drawings]

FIG. 1 is a flowchart for explaining a parental level registration / change method in a general DVD system.

FIG. 2 is a diagram showing a part connected to each part of the flowchart of FIG. 1;

FIG. 3 is a state diagram of an OSD screen provided to a user in each stage of FIGS. 1 and 2;

FIG. 4 is a configuration diagram illustrating a password reset device according to the present invention.

FIG. 5 is a flowchart illustrating a password reset method according to the present invention.

FIG. 6 shows O provided to a user in each step of FIG.
It is a state diagram of an SD screen.

[Explanation of symbols]

 31 key input section 32 system controller 33 deck section 34 signal processing section 35 OSD section 36 monitor

Claims (18)

[Claims] 1. A method for resetting a password stored in a disk system, comprising: (a) requesting reproduction of a specific disk; and (b) resetting the disk to be reproduced in response to the request of step (a). Determining whether data is recorded; and (c) permitting reset of a password recorded in the disk system when it is determined in step (b) that reset data is recorded. A method comprising: 2. The method according to claim 1, wherein the disc on which the reset data is recorded is a preview disc. 3. The method of claim 1, wherein password reset permission is used to change a parental level in a DVD system. 4. The method of claim 1, wherein step (a) involves playing a preview disc. 5. The method according to claim 4, wherein said step (a) requires the playback of a preview disc via a display. 6. The method according to claim 5, wherein said step (a) requires the playback of a preview disc via an on-screen display. 7. The step (b) includes: (b1) reproducing a signal recorded at a specific recording position of the disc loaded according to the request of the step (a); and (b2) step (b1). 2. The method according to claim 1, further comprising the step of determining whether the signal reproduced in the step (i) is reset data. 8. The method of claim 1, wherein step (c) requires a change of a stored password. 9. The method according to claim 8, wherein the step (c) requires a change of a stored password via a display. 10. The method of claim 9, wherein step (c) requires a change of the stored password via an on-screen display. 11. A display, comprising: a key input unit; reproducing means for reproducing a signal recorded on a loaded disc; and control means, wherein the control means requests a password reset through the key input unit. A request is made to reproduce a specific disk in response to a signal, and when reset data is recorded on the disk reproduced by the reproducing means in response to the request, resetting of a password stored in the disk system is permitted. And the disk system. 12. The disk on which the reset data is recorded is a trial disk.
1. The disk system according to 1. 13. The disk system according to claim 11, wherein the disk system is used for changing a parental level in a DVD system. 14. The disk system according to claim 11, wherein said control means requests reproduction of a preview disk in response to a password reset request signal. 15. The disk system according to claim 14, wherein the display displays a request for reproducing a preview disk. 16. The disk system according to claim 15, wherein said display displays on-screen a reproduction request of a trial listening disk. 17. The display as claimed in claim 11, wherein the display displays a stored password change request.
The disk system according to 1. 18. The disk system according to claim 17, wherein the display displays on-screen the stored password change request.