KR100288792B1 - Data recording optical discs and their playback devices and playback methods - Google Patents

Abstract

The present invention decrypts encrypted video data using a playback code recorded in a specific area of an optical disk at the time of reproduction of an optical disk, and reproduces and outputs the encrypted video data so that the optical disk can be easily reproduced and communicated with an external server. The present invention relates to a data recording optical disc, a reproducing apparatus, and a reproducing method for reproducing encrypted recorded data even after a failure, and to post-process the reproduction result information. The data recording optical disc reproducing method according to the present invention comprises: A first step of identifying a type of optical disc mounted; A second step of detecting a decoding code recorded in a specific area of the optical disc according to the identification result; A third step of decoding and reproducing recorded data using the detected decryption code; And a fourth step of storing the result information of the reproduction after the reproduction of the recorded data, thereby minimizing the initial time required for optical disc reproduction and independent of external factors such as a failure of a modem or a communication line. In addition, the user can easily play back the optical discs, and the user's convenience is improved. Also, by transmitting all the playback result information through one external communication line, without reducing the fee reduction fee of the rental title service provider. This is a very useful invention that can reduce the communication fee of the user.

Description

Data recording optical disc and its playback device and playback method

The present invention relates to a data recording optical disc for reproducing image data recorded on an optical disc by using a reproduction code recorded in a specific area of the optical disc, a reproducing apparatus and a reproducing method thereof, and more particularly to an optical disc. Recording a reproduction code for decrypting encrypted image data in a specific region of the optical disc, and decoding the encrypted image data using the reproduction code recorded in the specific region at the time of reproduction of the optical disc to reproduce and output the optical disc Reducing the time required for minimizing the time required to simplify the playback of optical discs, and to ensure that encrypted recorded data is reproduced even in the event of communication failures with external servers And a reproducing apparatus and a reproducing method thereof.

Digital Video Express (DIVX) DVD players are designed to address the high price of DVD titles that are preventing the penetration of DVD players. DVD titles for DIVX, like regular video tapes, are borrowed from rental shops by consumers, By receiving the decoding code provided for decoding the recording signal of the DVD title online and watching it, the high quality image can be viewed at low cost without purchasing the DVD title, and the result information of the reproduction is provided. By transmitting to a company, it is possible to limit the viewable period and to pay an additional fee for playback after the elapsed period.

Fig. 1 is a configuration diagram of an optical disc reproducing apparatus for reproducing a DVD title for DIVX, comprising: a pickup section 11 for detecting a recording signal from an inserted optical disc 10 surface; Motors M1 and M2 for rotating the pick-up part 11 and the inserted optical disc 10, respectively; A drive unit 30 for driving the motors M1 and M2; An R / F unit 20 for filtering the signal detected by the pickup unit 11; The drive of the drive unit 30 is controlled from the output signal of the R / F unit 20 and the rotational speed of the optical disk 10, and the synchronization of the output signal of the R / F unit 20 is detected. Servo unit 40; A DIVX decoder 50 for decoding the encrypted image data on the optical disc 10 using the detected synchronization; A digital signal processor 60 for digitally processing the decoded image data to restore original compressed video data; An MPEG decoder (70) for decoding the reconstructed moving picture compressed data into image data and audio data; A microcomputer 80 for controlling the detection and reproducing operation; And connected to the external server 200 via a communication line, and comprises a modem 90 for transmitting and receiving data with the external server 200.

In the DIVX disc reproducing apparatus configured as described above, in the conventional method of reproducing an inserted DIVX DVD title, when the DVD title 10 is inserted and requested for reproduction, the microcomputer 80 is connected to the servo unit 40. The pickup unit 11 is controlled by the drive unit 30 so that the pickup unit 11 reads out recording data recorded in a specific area of the optical disc 10. The optical disc 10 If is a DVD title for DIVX, the specific area designated in the DVD title for DIVX includes a unique identification code (ID) of the DVD title for DIVX and a type code indicating that the type of the optical disc 10 is a DVD title for DIVX, In other words, a code for distinguishing it from a general DVD title is recorded. The recorded data is read out by the pickup section 11 and filtered through the R / F section 20 to filter the clean signal. , The servo unit 40 Synchronization is detected by the digital signal processor 60 to restore the high frequency signal output from the R / F unit 20 to the original digital data by the synchronization detected by the servo unit 40.

The microcomputer 80 identifies the type of the optical disk 10 according to whether or not a code indicating a disk type in the restored digital data is detected. When a type code is detected, the microcomputer 80 detects the optical data. The disc 10 is recognized as a DVD title for DIVX, thereby detecting a unique identification code of the DVD title for DIVX in the restored digital data.

Subsequently, the microcomputer 80 controls the modem 90 to connect to the external server 200 through a communication line or an exchange line, and when the connection with the external server 200 is completed, the detected unique identification code. The external server 200 will transmit.

The external server 200 receiving the transmission data transmits a descramble code corresponding to the DIVX title of the received unique identification code. When the descramble code is received through the modem 90, the external server 200 receives the descramble code. The microcomputer 80 sets the code value to the DIVX decoder 50.

After the setting is completed, the microcomputer 80 controls the pickup unit 11 to move to the initial position of the data area so as to detect the scrambled and recorded image data.

The detected recording signal is filtered by the R / F unit 20, and the clock synchronized with the phase in the servo unit 40 is applied to the DIVX decoder 50 from the signal. The DIVX decoder 50 restores the digital signal recovered by the synchronized clock to a data stream before scramble using a predetermined decoding code.

The decoded data stream is signal-processed by the digital signal processor 60 to be restored to original digital data, and the amplifier decoder 70 decodes the restored digital data into an original video signal and outputs it. The encrypted video data recorded on the DIVX DVD title is reproduced.

During the playback of the DVD title for the DIVX, if the user requests the playback to be finished again through the microcomputer 80, the microcomputer 80 repeats the above-described process of disc identification and modem connection. By doing so, playback of the DVD title for DIVX is made possible.

However, in the above-described playback method of DIVX DVD titles, in order to play the inserted DIVX DVD titles, connection to the external server of the DIVX title provider must be connected through a communication means such as a modem. Therefore, in addition to wasting time unnecessarily, if a communication failure of the communication means occurs due to a modem failure or connection congestion, or an error occurs during data transmission or reception of the modem, the user can rent a DVD for DIVX. There is no way to play the title at all, and after the first title is played, the communication failure of the modem is restored after a long period of time. For example, if 48 hours have elapsed, this will result in a separate fee for playing DVD titles for DIVX. There was a problem that the scab.

Accordingly, the present invention has been made to solve the above problems, and provides a DIVX title having a reproduction code recorded therein for decrypting recorded data encrypted in a specific area of an optical disc, and can reproduce the same. It is an object of the present invention to provide a data recording optical disc, a playback apparatus thereof, and a playback method thereof.

Fig. 1 shows the structure of a conventional optical disc reproducing apparatus for reproducing a rental DVD title.

Figure 2 shows a part of the manufacturing method of a data recording optical disk according to the present invention,

Fig. 3 shows an example of a specific area in which a reproduction code is recorded on a data recording optical disc according to the present invention.

Fig. 4 shows the construction of a preferred embodiment of a data recording optical disc reproducing apparatus according to the present invention.

Fig. 5 is a flowchart showing the flow of a preferred embodiment of the data recording optical disc reproducing method according to the present invention;

Fig. 6 shows a form in which data is sequentially stored in a memory in the data recording optical disk reproducing apparatus according to the present invention.

※ Explanation of code for main part of drawing

A: Conventional Rental DVD Title Player

B: Data recording optical disc reproducing apparatus according to the present invention

10 optical disc 11 pickup portion

20: R / F section 30: drive section

40: servo unit 50: DIVX decoder

60: digital signal processor 70: MPEG decoder

80: microcomputer 81: non-volatile memory

82: ROM 90: Modem

100: OSD unit

A data recording optical disc according to the present invention for achieving the above object is characterized in that a code for decoding recorded data is recorded in another area.

In addition, the method for reproducing a data recording optical disc according to the present invention comprises: a first step of identifying the type of the optical disc inserted; A second step of detecting a reproduction code recorded in a specific area of the optical disc according to the identification result; A third step of decoding and reproducing recorded data using the detected reproduction code; And a fourth step of storing the result information of the reproduction after the reproduction of the recorded data ends.

The data recording optical disk according to the present invention configured as described above is first formed by recording and encrypting an image signal in a data region of the optical disk, and stacking a recording film on the optical disk on which the image signal is recorded. It is formed by recording a separate playback code for decrypting the encrypted data in an arbitrary area of the recording film which does not overlap vertically.

In addition, in the method for reproducing a data recording optical disc according to the present invention, the reproduction code of a specific area of the inserted optical disc is detected and the type of the optical disc is identified therefrom, according to the identified type. The encrypted recording data on the optical disc is decrypted and reproduced by using the detected reproduction code, and after the decrypted reproduction, the result information of the reproduction is stored, and the stored reproduction result information depends on the state of the device and the communication line. At the appropriate time, it is connected to the external server and sent.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, preferred embodiments of a data recording optical disc according to the present invention, a reproducing apparatus and a reproducing method thereof will be described in detail with reference to the accompanying drawings.

First, a method of manufacturing an encrypted data recording optical disk used in the data recording optical disk, the playback apparatus and the playback method thereof according to the present invention will be described with reference to FIG.

To produce a stamper for the encrypted image data (scrambled data) in order to encrypt and record the image signal in the data region (region c of FIG. 3) of the optical disk, After filling the stamper with a resin cured by ultraviolet light (Fig. 2A), and curing the resin by shining ultraviolet rays from the plastic sheet side (Fig. 2B), the encrypted image An optical disc in which data is recorded in the data area is produced (Fig. 2 (C)).

In this way, the recording film is laminated on the optical disk on which the encrypted image data is recorded, and the hardened recording of the region (region a in FIG. 3) in the region of the optical disk on which the recording film is stacked does not vertically overlap with the encrypted data region. And a reproduction code for reproducing the encrypted video data, a unique identification code (ID) of the optical disc, and an identification code indicating that the type of the optical disc is a DVD title for DIVX. do.

FIG. 4 is a configuration diagram of a preferred embodiment of a data recording optical disc reproducing apparatus according to the present invention for reproducing a data recording optical disc produced by the above process, in which the unique identification code of the optical disc is shown in FIG. And a non-volatile memory 81 for storing reproduction information (reproduction start time and reproduction end time data), and the like; A ROM 82 in which a font for on-screen display (OSD) is stored; And an OSD unit 100 for converting and outputting the corresponding character into a video signal form from the character font stored in the ROM 82.

FIG. 5 is a flow chart showing a preferred embodiment of a data recording optical disc reproducing method according to the present invention. Hereinafter, the data recording optical disc according to the present invention and the flow chart of FIG. The playback apparatus and the playback method will be described in detail.

First, when the optical disk 10 is inserted and played back (S10), the microcomputer 80 controls the pickup unit 11 to read and reproduce recorded data of a predetermined specific area of the optical disk 10, The microcomputer 80 identifies the type of the optical disk 10 as described above from the digital data read out and reproduced (S11).

When the identified type is a DVD title for DIVX, the microcomputer 80 checks whether or not a reproduction code of digital data is detected in a predetermined specific region (region a in FIG. 3). In this case, the microcomputer 80 identifies the optical disc 10 as a conventional DIVX DVD title. Accordingly, the optical disc 10, i. To be reproduced (S30).

If the microcomputer 80 detects a playback code from the designated specific area, the microcomputer 80 identifies the optical disc 10 as a DVD title for DIVX produced according to the present invention (S20). The decoding code for data decoding in the detected reproduction code is applied to the DIVX decoder 50, and the unique identification code of the optical disc in the reproduction code is in the format shown in FIG. The data is stored in the nonvolatile memory 81 together with the playback start time of 10 (S21).

Subsequently, the microcomputer 80 controls the pickup unit 11 to detect a video signal encrypted and recorded in a data area on the optical disc 10, and the detected encrypted video signal is described above. It is input to the DIVX decoder 50 through an RF filter process and a synchronization process. The DIVX decoder 50 decodes the inputted encrypted image data from the microcomputer 80 using a previously set decryption code, and the decoded image data includes the digital signal processing unit ( 60) through the MPEG decoder 70 (S22), the moving picture reproduction of the DVD title for DIVX is made.

During the playback of the DIVX DVD title as described above, when a playback end request is made through the microcomputer 80 (S40) or when the playback of the title is completed, the microcomputer 80 sets a playback end time to the nonvolatile memory ( 81 is stored as shown in FIG. 6 to complete one transmission data frame, for example, frame 1 (S41), and the microcomputer 80 controls the modem 90 to control the external server 200. To be connected.

When the connection with the external server 200 is normally performed (S50), the microcomputer 80 transmits the stored playback result information (unique identification code of the DIVX title, playback start and playback end time, etc.) to the modem 90. By transmitting to the external server 200 of the DIVX title providing service through, it is notified that the reproduction of the specific DIVX title has been made for a predetermined time (S51).

When the external server 200 properly receives the transmitted reproduction result information (S70), after confirming a reproduction time of a specific DIVX from the received reproduction result information, the external server 200 transmits data indicating completion of data reception, The microcomputer 80 receiving the data through the modem 90 recognizes the data reception of the external server 200, and accordingly, the previous transmission result stored in the non-volatile memory 81 is transmitted. After deleting the information, for example, the reproduction result information corresponding to the frame 1 (S71), the user waits until there is a reproduction request from the user.

If, in the above-described operation, the modem 90 is not connected to the external server 200 due to a communication failure, or the data indicating that the data reception is completed from the external server 200 is not received. The microcomputer 80 does not delete the stored playback information and keeps it as it is (S60) and waits for a user's playback request.

Subsequently, when the user requests to play the DIVX title again through the microcomputer 80, the microcomputer 80 causes the above-described process to be repeated, thereby stopping or terminating the playback of the optical disc 10. The reproduction result information is stored in the nonvolatile memory 81, and the external server 200 may fail due to a communication failure on the modem 90 or a line even after the reproduction of the optical disc 10 several times of the DIVX title. When not connected to the microcomputer 80, the microcomputer 80 continuously stores the playback result information according to the playback of the DIVX title in the nonvolatile memory 81 as shown in FIG. Control 90 so that the modem 90 is connected to the external server 200.

When the modem 90 is connected to the external server 200 through a connection attempt process with the external server 200, the microcomputer 80 continuously stores the playback results in the nonvolatile memory 81 in the meantime. By reading all the information and transmitting it to the external server 200, the external server 200 grasps the reproduction result information for any DIVX title made during the modem 90 or communication line failure, and charges for the reproduction. To be calculated.

By the way, when the storage amount of the reproduction information as described above becomes the capacity of the nonvolatile memory 81 or when the reproduction result information is stored in the predetermined number of times by the microcomputer 80, the user sets the modem or communication. Determining that the DIVX title playback was not intended because of the intentional (malware) disturbance of the circuit, and from the ROM 82, the guide text data, i.e., the disc of the title inserted due to the "modem failure" can no longer be played. On-screen (OSD) character fonts such as "can not be read" and transmits it to the OSD unit 100, so that the OSD unit 100 converts the input character font into the corresponding character video signal In addition, the user is notified of the abnormality of the modem or communication line (in some cases, a warning about repeated playback), and returned to a normal communication state, as shown in FIG. The resulting information is sent to complete the external server 200 and prevent the reproduction of the optical disc any more with respect to the subsequent reproduction request until it is removed from the non-volatile memory 81 is made.

The data recording optical disc, the reproducing apparatus, and the reproducing method according to the present invention, which are constituted as described above, reproduce the optical disc by recording and providing a decryption code for decrypting encrypted video data in a specific area of the optical disc. Optical discs can be played without having to connect to an external server every hour, minimizing the initial time required to play optical discs, and recording data on loaned data regardless of external factors such as modem or communication line failure. Can be played easily, and the user's convenience is improved. Also, by transmitting all the playback result information through one external communication line, the user's communication fee can be reduced without incurring the fee reduction factor of the rental title service provider. It is a very useful invention that can be made.

Claims (9)

A first step of identifying a type of optical disc mounted; A second step of detecting a decoding code recorded in a specific area of the optical disc according to the identification result; A third step of decoding and reproducing recorded data using the detected decryption code; And And a fourth step of storing the result information of the reproduction after the reproduction of the recorded data ends. The method of claim 1, A fifth step of requesting access to an external server after storing the reproduction result information; And And a sixth step of transmitting the stored reproduction result information to the external server according to the connection result. The method of claim 2, And deleting the stored data corresponding to the transmitted reproduction result information according to whether or not the reproduction result information of the external server is received. The method according to any one of claims 1 to 3, And the reproduction result information comprises an identification code, a reproduction start time data, and a reproduction end time data of the reproduced optical disc. The method of claim 1, The first to third steps are performed every time the optical disc is played, and the result information of the reproduction is sequentially stored. Identification means for detecting a reproduction code of a specific region of the inserted optical disc and identifying therefrom the type of the optical disc; Reproducing means for decoding and reproducing the recorded data of the optical disc using the detected reproducing code; Storage means for storing the result information of the reproduction after the reproduction of the recorded data ends; And And a data transmitting means for transmitting the stored reproduction result information to an external server. The method of claim 6, And reproducing the reproducing result information as much as the capacity of the storing means, further comprising control means for preventing the reproducing operation of the reproducing means with respect to a subsequent reproducing request. The method of claim 6, And reproducing the data recording optical disc further comprising controlling means for preventing the reproducing operation of the reproducing means in response to subsequent reproducing requests. Device. The method according to claim 6, 7, or 8, And reproducing means for displaying a specific message for notifying the transmission failure of the data transmitting means.