KR100621374B1 - Play Method for Optical Disc - Google Patents

Abstract

The present invention relates to a method of reproducing an optical disc, comprising the steps of: setting a password for a corresponding data area when recording data on the optical disc; recording the set password in a specific area of the disc; inputting a password when playing the data; Requesting, comparing the input password with the set password, and accessing and reproducing the corresponding data only if the password is the same in the comparing step. It is effective to prevent editing, deletion and playback by others.

Password, password entry, program, access

Description

Play Method for Optical Disc

1 is a block diagram briefly showing a DVD / HDD combo system;

2 is a file structure diagram of a DVD disc;

3 is a flowchart illustrating a method for automatically setting a title according to an embodiment of the present invention;

4 is a menu configuration diagram displayed on the screen when the program list menu is selected;

5 is a display example of a password setting screen;

And,

6 is an embodiment of a password input screen.

* Description of symbols on the main parts of the drawings *

10: switching unit 20: MPEG encoder

30: HDD 40: Flash Rom

50: control unit 80: digital signal processing unit

90: DVD Player

The present invention relates to a method for reproducing an optical disc, and more particularly, to a method for restricting reproduction for a specific program in a recordable optical disc.

Video recording and reproducing apparatus capable of recording a broadcast signal on a recording medium or reproducing the recorded broadcast signal has been developed by using various video sources such as satellite broadcast signals, cable broadcasts, and network broadcasts through the Internet, according to the development of digitalization and compression technology. It is being developed to support data storage and data storage on optical media such as CD-ROM titles or DVD titles. Such an optical media medium has almost no deterioration in image quality due to usage period, and is rapidly replacing conventional analog image recording media because it can store high quality images and multi-channel audio data (eg, 5.1 channels). As described above, an optical media medium such as a DVD title that stores video data and audio data can store data of hundreds of Mbytes to several Gbytes, so that several programs can be recorded on one optical disc.

Therefore, since several people may store separate programs on a single disk, it is necessary to restrict access by other people than the corresponding user.

However, until now, techniques for restricting access to the entire disk are known, and there is no technique for restricting access to each program. For example, there is a method of setting a password for an optical disc dedicated to reproduction, and confirming this at the time of disc reproduction to allow limited access. In this case, there is a problem that a password must always be entered for other contents of the disc that can be viewed normally because of one program to be restricted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problem, and an object of the present invention is to provide a method of restricting access to a program of a specific area in an optical disc.

In accordance with an aspect of the present invention, there is provided a method of reproducing an optical disc, including: setting a password for a corresponding data area when recording data on the optical disc; recording the set password in a specific area of the disc; Requesting input of a password when reproducing data, comparing the input password with a set password, and accessing and reproducing the corresponding data only when the password is the same in the comparing step, and setting the password. Determining step of determining whether the recording of data on the optical disk is completed, a display step of displaying a password input screen when recording is completed in the determination step, and displaying a program list including the set password if a password is set To make it happen.

In addition, the step of requesting input of a password when reproducing the corresponding data includes determining whether the data has a password set and displaying a password input screen if the password is set. Make it easy to unlock your password.

Similarly, when the passwords are different in the comparing step, it is possible to provide convenience to the user by further displaying a message that the input password is different.

In another aspect of the present invention, there is provided a method of reproducing an optical disc, which includes determining whether or not data has been recorded on the optical disc, and displaying a password input screen when recording is completed. Step, if a password is set, recording the set password in a specific area of the disk and displaying a list of programs including the set password, requesting input of a password when playing the data, comparing the input password with the set password And accessing and reproducing the corresponding data only when the encryption is the same in the comparing step.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Fig. 1, a DVD / HDD video recording and reproducing apparatus of the present invention will be described. The illustrated DVD / HDD video recording / reproducing apparatus includes a switching unit 10, an MPEG encoder unit 20, a hard disk drive (HDD) 30, a flash ROM 40, a controller 50, a RAM (RAM) 60, light receiving unit 70, digital signal processing unit 80, and DVD 90.

The switching unit 10 receives various image data / audio data sources from the outside or outputs the image data sources output from the decoder unit 80 to the outside (for example, a monitor screen). The switching unit 10 receives an external signal such as a component and a composite from a broadcast signal and a video (not shown), and receives the external signal from a broadcast signal and a function block in the video recording / reproducing apparatus. Connect optionally. For example, when an external signal applied from an external device such as a video is a component or a composite signal, the external signal is applied to the MPEG encoder unit 20.

The MPEG encoder unit 20 is composed of a video decoder 21, an audio ADC 22 and an MPEG encoder 23, and after analog-to-digital conversion of the analog form of the image data source applied from the switching unit 10, It is compressed in MPEG format (eg MPEG-2 format). In general, MPEG image data has a compressed form in order to reduce the amount of space to be stored when storing the data in a storage medium such as a hard disk drive (HDD) 30.

The hard disk drive (HDD) 30 is configured to store or read video data and audio data having an MPEG format in a data recording area in the form of a file.

The flash ROM 40 stores a program of a control unit, and includes a program list screen (see FIG. 4), a password setting screen (see FIG. 5), a password input screen (see FIG. 6), and the like according to an embodiment of the present invention. It is configured to store the GUI. A program list screen will be described in detail with reference to FIG. 4. The program list stored in the Flash Rom 40 includes an icon menu 311 corresponding to the program, a title display section 312 indicating the name of the program corresponding to each icon 311a to 311d, and each program recorded on the disc. And a time display section (313) indicating a time, and a playback time display section (Length) 314 indicating recording and playback time of each program. Each icon 311a to 311d displays the first start frame of the image data having the MPEG format stored on the disc, that is, the I frame, and has information on the start address of the stored program. In addition, the title display unit (Title) 312 to display the title of the program, and the password display unit 215 displays a four-digit password that is input when the user uses the playback lock function to watch the program limitedly do. In the embodiment of the present invention, if the password is stored, it is displayed as "****", and if the password is not stored, it is displayed as "----".

The control unit 50 stores the MPEG data output from the MPEG encoder unit 20 to a hard disk drive (HDD) 30 or the digital signal processing unit to read image data / audio data stored in the hard disk drive (HDD) 30. (80). When the DVD is played back, the control section 50 reads the information on the DVD title from the information in the disc information file area and records the information in the root directory area of the HDD 30. Also, the program list screen, the password setting screen, and the password input screen stored in the flash ROM 40 are read out and displayed on the display device.

The memory (RAM) 60 loads the control unit 50 when a file stored in the hard disk drive (HDD) 30 is edited. In other words, instead of directly editing a file stored in the hard disk drive (HDD) 30, the file is edited in the memory (RAM) 60 and then stored again in the hard disk drive (HDD) 30.

The light receiving unit 70 is a remote control device (not shown) for controlling the video recording / playback apparatus (for example, channel switching, volume control, image quality control, etc.) or a setting key (not shown) provided in the video recording / playback apparatus. Receives a generated control signal (not shown) and applies it to the controller 50.

The digital signal processing unit 80 receives the MPEG format image data stored in the hard disk drive (HDD) 30 via the control unit 50, decodes it, and converts the image data into a video format (for example, NTSC / PAL). The converted signal can be reproduced in an image display apparatus such as a television.

The DVD 90 reads image data and audio data from a DVD disk and stores the image data and audio data in a hard disk drive (HDD) 30 or is applied to the digital signal processing unit 80 to reproduce the signals applied by the MPEG encoder unit 20. Write to disk.

Hereinafter, with reference to FIG. 2, the general data structure of a DVD disc is demonstrated. The internal structure includes a recording information area including an area for mechanical clamping from the inside of the disc, a power calibration area (PCA) used to find the proper recording power, and an RMA (Recording Management Area) that temporarily stores the information being recorded. It is divided into RIA: Recording Information Area, and File Information Area.

The file information area is divided into three parts, a lead-in area, a data recordable area, and a lead-out.

When the recording is completed, TOC (Table of Contents) information is recorded in the lead-in area, and files 1 (F1) to 99 (F99) of the data recording area substantially contain a movie or music video. (F0) is also called a disk information file and contains file system information. Various reference information about the data recorded in files 1 (F1) to 99 (F99) of the DVD disc are stored. In particular, in the disc information file F0 area, the position information of the image data corresponding to the I-frame, the DVD title information, and the respective DVD titles are set in the image data contained in the files 1 (F1) to 99 (F99). The password is stored. Therefore, the disk scan can be performed using the positional information of the image data corresponding to the I-frame contained in the disk information file F0.

First, normal reproduction will be described. When the DVD disc is mounted on the DVD player unit 90, the optical pickup device (not shown) of the DVD player unit 90 reads out the table of contents (TOC) information and information in the disc information file (F0) area of the disc. The digital signal processor 80 is provided. The digital signal processing unit 80 detects and provides TOC information to the control unit 50, while decoding the information of the disc information file (F0) area from the MPEG decoder 81 to the control unit 50, the control unit 50 ) Stores the information of the disc information file F0 area in an internal memory (not shown). At this time, the information of the disc information file F0 area includes information on the DVD title and password information as described above. The stored information as described above is controlled to be displayed on the display device as necessary.

The DVD player 90 then performs normal playback of the disc. As the DVD player 200 performs normal playback, audio and video data recorded in files 1 (F1) to 99 (F99) of the disc 100 are sequentially read and provided to the digital signal processor 80, and the digital signal is received. The processor 80 demodulates the read audio and video data and outputs the signal to the switching unit 10.

The recording operation is controlled by the control unit 50 so that the signal applied from the MPEG encoder unit 20 via the switching unit 10 is recorded on the disc in the DVD 90.

Hereinafter, a method of reproducing an optical disc according to an embodiment of the present invention according to the above configuration will be described with reference to FIG.

When the recording operation is performed by an external control signal, the controller 50 controls the DVD 90 to record the signal applied by the MPEG encoder unit 20 to the disc (S210). When recording is completed in step S210, the password setting screen is read by the flash ROM 40 and displayed on a display device (not shown) (S212). The password setting screen allows the user to select whether or not to set a password for the corresponding program. If the user wants to set a password, the password input screen is read and displayed by the Flash Rom 40, and at the same time, it is determined whether or not the password is set. It is made (S214). When the user sets a password in step S214, a list of programs in which the password is input is displayed (S216). The program list is read by the Flash Rom 40 by the controller 50 so as to simultaneously display the input password. In step S214, the password may be input twice in order to correct the user's password input. As shown in 311d of FIG. 4, the program in which the password is set is displayed as "****" on the password display unit 315. If the user does not set a password in step S214, a program list screen with no password set is displayed (S230). That is, a password that is not set as in 311c of FIG. 4 is displayed as "----". The set password is stored in the flash ROM 40 and recorded in a specific area of the disk (S218). Then, if the user wants to play the stored program (S220), the controller 50 determines whether or not a password is set for the corresponding program in a specific area of the disk (S222). If the password is a program set in step S222, a password input screen (see FIG. 6) is displayed to receive a password (S224). It is determined whether or not the input password and the stored password match (S226). If they match, the corresponding program is accessed and played back (S228). If they do not match, playback ends.

If the passwords do not match in the above step, the user may display a message that the passwords do not match for the convenience of the user. When the program list is displayed in step S216, the user may modify or change the password for each program. It may be.

In addition, in the present invention, when the password is set, the set program list is displayed first, and then the set password is stored. However, when the password is set, the program list is displayed and the password is automatically stored. Although the above-mentioned password is described as being stored in the disk information file (F0) area of the file information area in one embodiment of the present invention, it can be used in any area that can be set and stored by the user and the DVD area in the DVD / HDD combo system. Of course, each setting can be stored in the HDD area.

As described above, according to the present invention, a system capable of restricting access to a specific program can be implemented.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and variations belong to the appended claims.

As described above, according to the method of reproducing an optical disc according to the present invention, it is possible to set a password for each of the recorded programs, thereby preventing the editing, deletion, and reproduction by others. In particular, when a number of proggles are recorded on a single disc, it may be impossible to watch only a specific program that minors cannot watch, such as an adult program.

Claims (5)

Displaying a password input screen when data recording is completed on the optical disc, setting a password, and displaying a program list including the set password if the password is set; Recording the set password in a specific area of the disk; Requesting input of a password when reproducing the corresponding data; Comparing the input password with the set password; And And accessing and reproducing the corresponding data only when the passwords are the same in the comparing step. delete The method of claim 1, Requiring input of a password when playing the corresponding data Determining whether the data has a password set; And And displaying a password input screen if a password has been set. The method of claim 1, And displaying a message that the input password is different if the passwords are different in the comparing step. A judging step of judging whether or not data has been recorded on the optical disc; A display step of displaying a password input screen when recording is completed in the determining step; If a password is set, recording the set password in a specific area of the disk and displaying a program list including the set password; Requesting input of a password when reproducing the corresponding data; Comparing the input password with the set password; And And accessing and reproducing the corresponding data only when the passwords are the same in the comparing step.

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