KR100263986B1 - Disc structure for lease and reproducing method and apparatus of the disc - Google Patents

Abstract

PURPOSE: A disk structure adapted for lent, and a reproducing method and device thereof are provided to remotely control the disk, and to reproduce the disk and a DVD by using the reproducing device. CONSTITUTION: A device for reproducing a disk comprises a disk(31) storing data, an optical pickup device(35) reading data from the disk for converting into electric signal, and an analog signal process unit(43) compensating and filtering an analog signal from the optical pickup. A reproduction applying control circuit unit(100) processes intrinsic identification data read from the optical device. Moreover, a DSP(Digital Signal Processor)(37), a servo control unit(51), an OSD(On Screen Display) generate unit(53), and an output process unit(39) are included in the device. A control unit(41) receives a command from a user through a key input unit(55) while performing a system control.

Description

Remote Rental Disc Structure and Method and Apparatus for Playing the Same

The present invention relates to a disc reproducing apparatus, and more particularly, to a disc reproducing apparatus configured to play a DVD and a remote rental disc with rental control.

Currently, the rental business of videotapes and magnetic tapes containing movies, music videos, etc. are being popular, and recently, optical discs have also participated as recording media used in the rental business.

Furthermore, digital video discs (hereinafter referred to as "DVDs"), which have emerged as the next generation of recording media, can store the amount of data that can be played for about two hours as well as text, audio, and video signals, and at the same time, semi-permanently store recorded data. As a result, it is likely that DVD will be used as a recording medium of a video rental business in the future.

As described above, the following problems have been presented with respect to a recording medium for recording data such as an existing video rental business and video and audio when the video rental business using a DVD is commercialized.

First, the conventional video rental business lends discs (or recording media) containing images, audio, and other data to consumers in a state in which a variety of discs are obtained by a person who has permission from the producer who produced the disc.

For this reason, the rental of a recording medium in such a manner is to rent a tape in a form in which a consumer visits a rental shop in order to rent a tape and returns it after a predetermined time.

Therefore, the video rental has presented problems with each other in terms of consumers who rent recording media and also in terms of producers or lenders who produce and sell the recording media.

First, consumers must go directly to the rental store to rent tapes or return the tapes. Second, they can be economically or temporally disadvantageous because they have to return the tapes even if they haven't seen them. Similarly, video rental shops or tape makers can't prevent illegal copying of tapes lent to consumers, so they don't get much money.

Furthermore, in the data structures of commercially available recording media including DVDs, preventive measures for preventing the duplication of discs after selling or renting the discs are very poor. In particular, due to the development of industry and the modernization of real life, at least one magnetic tape player or an optical disc player is provided in each home, and the development of the technology enables the copying and reproduction of recording media using a computer. For this reason, it is very urgent for the seller to make and sell discs.

Next, with reference to FIG. 1, which shows the data recording structure of a DVD, a general DVD structure will be examined, and it will be seen that this DVD is inappropriate for use in a remote disk rental system.

As shown in FIG. 1, a digital video disc (hereinafter referred to as a DVD) has a lead-in formed at a predetermined distance from the center of the disc, and records data toward the edge of the disc from the end of the lead. A data record area is formed, and a lead-out area is formed later in the data record area.

In such a DVD data structure, no information necessary for disc reproduction is stored in the lead-in and lead-out areas, but only data (VTS) for a plurality of video titles in the data recording area and the respective video titles. It includes a video manager (Vedio Manager) that records management information about the system.

Therefore, the playback of this DVD reads the position information of the video title that the optical pickup apparatus wants to play from the Video Manager at the beginning of the data recording area, and the control unit based on the position information. Recognizes the location information for the video title desired by the user.

Then, the control unit applies a control signal according to the recognized position information to control the movement of the optical pickup apparatus, and then the data read from the optical pickup apparatus is displayed on a display such as a monitor as data for a video title desired by the user. Signal processing until displaying on the device is performed.

However, a DVD having such a structure has title information, region information, and the like, but does not include information for identifying each disc. In other words, as can be seen from the signal processing process for reproducing a normal DVD described above, when a reproduction request is inputted, the optical pickup device is recorded in an area (Video Manager) in which necessary management information for the first disc reproduction is recorded. By moving, control information required for disc playback is obtained. After recognizing the management information, it is a stand-alone type that is used to play data afterwards. Since a normal DVD is used for remote playback of a disc to be played back, the lender, rental time, etc. Could not manage.

Accordingly, there is a need for a disc as a new recording medium capable of remote control, and a control system for post-sales and post-sale management of the disc using the disc, and the device can be used to play a conventional DVD, which is a common standard. Compatibility will be required.

There is also a need to use a disc as a new recording medium that can be remotely controlled in a conventional DVD player.

An object of the present invention is to provide a new recording medium which can be applied to a remote rental system by remote control according to the disk management.

Another object of the present invention is to provide a reproducing apparatus capable of playing a combination of the above-described remotely mountable disc and DVD.

Another object of the present invention is to provide a structure of the above-mentioned remotely controllable disc which can be partially reproduced even in a conventional DVD player.

1 is a block diagram showing a data structure of a conventional DVD.

Figure 2 is a block diagram of the data contained in the disk for remote rental according to the present invention.

3 is a data structure diagram of a disk for remote rental in accordance with the present invention.

4 is a block diagram showing the structure of a disc reproducing apparatus according to the present invention;

FIG. 5 is a circuit diagram of an ECC block and a decryption circuit in the digital signal processor shown in FIG.

FIG. 6 is a detailed configuration diagram of the regeneration application unit shown in FIG.

* Explanation of symbols for main parts of the drawings

31 disc 33 spindle motor

35 optical pickup device 43 analog signal processing unit

37: digital signal processing unit 39: output processing unit

51: servo controller 41: controller

61: BCA processor 53: On-Screen Display

100: reproduction part 57: decryption circuit part

55: key input 37a: open ECC block

37b: ECC block for remote rental 57a: open decryption circuit

57b: Decryption circuit for remote rental 71: Modem

63: data interface 65: decryption circuit for remote rental

67: sub-control unit

The disc structure according to the present invention for achieving the above-mentioned object includes an area storing data according to the DVD standard error correcting code method, and data according to an error correcting code method different from the DVD standard error correcting code method. It comprises a region.

In addition, the DVD combined playback apparatus according to the present invention includes a pickup means for reading a signal recorded from a disc, a signal processor for processing a signal read by the pickup, and a disc type for determining a disc type based on the processed signal. If the disc is a disc that can be remotely rented, the play-applying circuit unit transmits the information on the disc to the outside and transmits a play authorization signal. Characterized in that it comprises an output processing unit for output processing the received signal of the remote loanable disk.

A reproduction method according to the present invention includes a signal processing step of reading data from a disc and processing the data, and determining the type of the disc from the data; When the determined disc is a remote loanable disc, obtaining a reproduction permission; And outputting data that has been reproduced or data recorded on a disk that is not available for remote rental.

Next, a remotely controllable disc and a combined playback apparatus according to the present invention will be described in more detail with reference to the drawings.

2 is a block diagram showing an embodiment of a disk that can be remotely controlled by the present invention, and specifically, a diagram for explaining the type of information stored in the disk.

In the following description of the present invention, a disk capable of remote control proposed in the present invention will be referred to as a remote rental disk.

In the remote rental disc according to the present invention, as shown in FIG. 2, video data in a video title is recorded in a DVD standard format so as to be compatible with a normal DVD, so that data reproduction signal processing can be performed in a normal playback circuit. Do.

Remote rental disc control data is a unique number information area 104 for storing the unique number of the disc where the title is stored as data referred for remote control of the title, interactive playback and playback menu, and security information area such as illegal copy prevention. (108), menu data 102 for the menu screen of the title, playback script 106, which is control information for the playback process of the title, and the like.

PlayScript is written in Java Scripts, a popular programming language that lets you manipulate interactive playback of titles. Since the remote control information is prepared differently from the conventional DVD format, the data of this part requires a separate process from that of a conventional DVD player. In order to be played in a different way from the DVD, data can be encoded to perform ECC for remote rental only.

This configuration alone does not operate at all when a disc for exclusive use of a remote loan is inserted into a normal player, so that some areas have an area in which both video data and control data are recorded in accordance with the DVD standard format.

Figure 3 shows an example of the logical configuration of the disk storing the data of the present invention as described above. In the present invention, the data area of the disc is divided into subdivisions in consideration of compatibility with a normal DVD player.

Open ECC area 210 composed of ECC coded data proposed by the standard DVD standard, ECC area 220 composed of ECC coded for remote rental, and located at the boundary of the two types of data areas. Thus, the ECC type of adjacent data is separated into a transition ECC region 230 indicating the change.

The open ECC region 210 is a region decoded by an error correction method of the DVD standard, and thus can be reproduced by an existing DVD player. If a remote rental disc is mounted in a normal DVD player, this portion is played back, but data recorded in the remote rental ECC area is not played. Therefore, in this area, a simple message or a message indicating that the disk is for remote rental is recorded.

This open ECC region 210 is shown in FIG. It has a data structure of a normal DVD, which, in brief, includes data (VTS) for a plurality of video titles and a video manager (VMG) for recording management information for each video title. .

Next, an ECC region 220 for remote rental is included at the rear of the open ECC region 210. The remote rental-dedicated ECC area 220 means an area recorded reproducibly by using an ECC of a standard different from the DVD standard, and is an area in which data cannot be reproduced by a general DVD player.

The remote rental ECC area 220 is divided into a video data area (DVD Vedio Zone) included in a normal DVD as shown in FIG. 2, and a control area for an interactive application which only a remote rental disc has. .

This control area includes data such as menu data, serial number, security information, and Java script. Data in this area is recorded as information necessary for data management. In the DVD video area, data is recorded as a data structure of a conventional DVD.

Therefore, when the remote rental disk having such a data structure is mounted in the remote rental player, it is determined whether the dedicated directory for the remote rental disk exists and whether the corresponding disk is a remote rental capable disk, and control is performed to read the video data. In other words, if a regular DVD is loaded into a remote rental play, the player refuses to operate because there is no directory structure for remote rental.

Of course, since the open ECC area 210 can be played as a normal DVD player, a part of the open ECC area 210 can be notified to the user by storing a message or a screen informing that the disk is a dedicated rental disk.

However, in the present invention, which will be described in detail below, when a DVD-only remote-loanable disk player example is determined to be a normal DVD, the mode is changed to start normal DVD playback.

Next, the transition ECC area 230 refers to an area including two files. One file is recorded as a standard ECC, and the other file is recorded as an ECC for remote rental. Say. This transition region is provided to recognize the boundary of the end portion of the open ECC region or the remote rental ECC region.

As described above, since the remote rental-only disc and the DVD have different recording methods of stored data, it is impossible to reproduce both of them using any one playback apparatus. Therefore, a reproducing apparatus capable of reproducing both is required. This means that it is possible not only to implement a remote rental system using a remote rental dedicated disk, but also to require a device capable of playing a general DVD.

Next, the reproduction apparatus according to the present invention will be described in more detail with reference to the accompanying drawings.

4 is a block diagram showing the configuration of a disc rental-only disc player constructed in accordance with the present invention.

In the structure, the disk 31 which stores data according to the structure of the disk shown in FIG. 3, the optical pickup device 35 which reads data from the disk 31, converts the data into electrical signals, and outputs them. . And an analog signal processor 43 for outputting after performing analog signal processing such as signal compensation and filtering of the analog signal output from the optical pickup device 35.

If it is determined that the mounted disk is a remote rental disk, signal processing such as digitization and error correction is performed on the unique identification information of the disk 31 read from the optical pickup device 35, and the unique identification information of each disk is recognized and recognized. And a reproduction authorization control circuit unit 100 for transmitting the generated unique identification information to an external business server and receiving a reproduction authorization control signal accordingly.

The digital signal processor (DSP) 37 for inputting data output from the analog signal processor 43, converting the signal into a digital signal, demodulating the signal, and outputting the signal after error processing such as error correction, etc. A servo controller 51 for controlling tracking and focusing, an on-screen display generator 53 for generating signals necessary for the on-screen display, and an output processor 39 for output processing according to data.

Then, a command from the user is received through the key input unit 55 to perform the control accordingly, and the necessary system such as the servo control unit 43, the DSP 37, the reproduction application control circuit unit 100, the output processing unit 39, and the like is required. It has a component such as a control unit 41 for performing the control.

In particular, the error correcting unit in the DSP 37 requires a separate block for ECC processing by dividing the general DVD data and the data read from the remote rental disc under the control of the control unit 41. ECC-processed data goes through an illegal copy prevention processing section that decrypts the encrypted video data for illegal copying according to the output from the reproduction / control circuit part. Each can be configured. The detailed configuration of the ECC unit and the decryption circuit unit 57 for decrypting the encrypted video data will be described later.

Detailed description and operation of the configuration device of FIG. 4 are as follows.

First, the playback apparatus according to the present invention has the control processing of the remote rental dedicated disk in the initial state, and when the determined disc is not dedicated to the remote rental, it is switched to the normal DVD control processing.

First, when the disk 31 is mounted, first, the RF reproduction signal read by the disk pickup device 35 is converted into an appropriate signal via the analog signal processing unit 43 and then sent to the digital signal processing unit 37.

The digital signal processor 37 demodulates the signal and decodes it by ECC processing. In this case, the predetermined area after the lead-in area in the DVD rental as well as the remote rental is subject to the DVD standard.

Next, the control section 41 first determines whether the disk 31 is a general DVD or a remote rental. This is easy because it consists of recognizing the specified directory on the disk. In other words, if there is a directory for remote rental in the directory structure, it is determined for remote rental. If there is no directory for remote rental, it is determined as a normal DVD.

In the case of remote rental, the servo control command to move the optical pickup device 35 to the lead-in area of the disc 31 in order to recognize the unique identification information (Burst Cutting Area information) recorded in the lead-in area required for the reproduction application. Is applied to read the recorded BCA information on the lead-in area of the disc.

In a typical DVD, pickup servo control is not performed in the lead-in area, so a separate servo control for accessing the BCA area is required.

The BCA information is sent to the reproduction authorization circuit unit 100, processed through appropriate signal processing, and then transmitted to a business server connected to the outside to receive a reproduction authorization signal. As shown in FIG. 6, the reproduction authorization circuit unit 100 is shown in FIG. And a BCA processor 102 for processing and decoding the BCA information. It has a modem 71 for transmitting and receiving the BCA information and other control information, a reproduction authorization circuit control unit 100 for controlling the modem 71 and the BCA processor 102, etc., and configures a separate memory 73 to transmit and receive. It may also be configured to temporarily store the data.

In addition, in order to prevent illegal copying of the video data for remote rental, the decryption circuit 65 and the data interface 63 and the modem for exclusive use of the remote loan are sent to the output processor 39 according to the first signal of the playback authorization circuit controller. An additional control unit 67 for signal control of the 71, memory 73 decryption circuit 65, and the like may be further included.

In the case of a general DVD, the decryption process is immediately outputted without being controlled by the reproduction application circuit control unit 100.

In more detail with respect to the reproduction authorization circuit unit 100, if it is determined that the remote loan disk 31, a specific unique number read from the disk is transmitted to the server connected to the outside via the modem (71). The server checks the unique number of the disk, and if the payment is not made or the second rental request has passed after the first rental period, a message is sent to the player to inform the user of the payment and the payment is made. If not, playback is prohibited. If no error is found, playback is allowed. The server, of course, has a database of title information, billing history, playback history, and user information about the unique number.

On the other hand, in some cases, when a user purchases a particular disk and wants to rent or own it permanently, the user may input such a command through the player's key input unit 55. When such a purchase command is transmitted to the server, the server may grasp the unique number of the disc and store it in the memory device, and then, if a playback request from the player comes in, the server may process the video to be viewed indefinitely.

Through this process, the business server checks the validity according to the reproduction permission of the unique identification information (BCA information) of the disc authorized through the modem, and then transmits a control signal according to the reproduction permission or impossibility.

When the play permission signal is input from the business server in the play authorization circuit unit 100, the play authorization control unit 100 transmits a disc play permission signal to the control unit 41, and then the control unit 41 is stored in the remote rental disk. Control for normal data reproduction of the title is performed. Since the connection with the server as the modem is connected and disconnected only until receiving a result signal for the reproduction permission, the communication load is not a problem even when using a communication network such as a public telephone network.

The control unit 41 receiving the disc reproduction permission signal moves the optical pickup device 35 to the data recording area. This data recording area is divided into an open ECC area 210 and a remote rental ECC area 220 as shown in FIG.

At this time, since the reproduction of the data is performed while moving from the open ECC area 210 to the ECC area 220 for remote rental, the controller 41 controls the optical pickup device 35 when the optical pickup device 35 is in the open ECC area 210. When the optical pickup apparatus 35 is moved to the remote rental dedicated ECC area 220, the control according to the remote rental dedicated ECC playback process is performed.

In other words, the control of the reproduction process according to the general ECC or the remote loan-only ECC requires that the data structure recorded in the remote-only ECC area is different from the data structure recorded in the open ECC area. This is because proper control is necessary.

That is, the ECC process in the digital signal processing unit 37, as shown in FIG. 5, includes a circuit unit 37a for performing ECC of the general DVD depending on whether the mounted disc is a general disc or a remote rental exclusively. The circuit unit 37a which performs ECC exclusively for remote rental is selectively driven to process data.

In general, ECC decoded data is usually specifically encrypted to prevent illegal copying, so it must be decrypted. The DVD standard proposes a separate illegal copy protection circuit. Therefore, in the case of general data, after decryption, the data is sent to the output processing unit 39 and output after processing according to the data type, and in the case of remote rental data, it is output through the decryption circuit unit 57 separately proposed.

The signals processed and output in this way are input to the output processor 39, and the signal processing that can be displayed on the monitor is performed. The monitor at this time is for outputting the video and audio information output from the player to the user. As an example of such a monitor, the present system may be configured by using a television, a computer monitor device, and the like, which are widely used.

FIG. 5 is a diagram of control for performing ECC and decryption appropriately for each data type after disc determination by the controller 41.

In the present invention, since an object of performing both a DVD and a disk for remote rental is provided, an ECC block for each type is separately prepared. In addition, encryption processing for preventing piracy is also separately configured, which has been separately proposed to have a more secure piracy prevention function than a conventional DVD.

The general DVD standard open ECC data recorded in the open ECC area 210 in the remote rental disk of the present invention is performed in the open ECC block 37a, and the remote rental data is decoded through the corresponding remote rental ECC block 37b. do. Therefore, the data subjected to the predetermined signal processing in the digital signal processing unit 37 is output after being ECC in the selected ECC block under the control of the control unit 41.

Among the data ECC processed in a specific ECC block in the digital signal processing unit 37, the open ECC data is decrypted by the decryption circuit unit 57a for preventing ordinary illegal copying, and likewise the ECC data for remote rental only. The decryption of the encryption is performed in the decryption circuit unit 57b for preventing illegal copying of the remote loan only.

At this time, the selection operation of the decryption circuit unit 57 is also switched by the control of the control unit 41.

That is, in the case of a normal DVD, after error correction is made in the open ECC block 37a. Signal processing is performed in the ordinary decryption circuit 57a. In the case of reproducing the remote-dedicated disc, signal correction is performed by the remote-dedicated decryption circuit 57b after error correction in the remote-dedicated ECC block 37b. Therefore, in the present invention, not only a remote rental disk but also a normal DVD can be played.

6 is a detailed circuit diagram of the reproduction application circuit 100 according to the present invention. The BCA processor 61 which reads and processes the unique information of the disc and the decryption for remote rental according to whether or not to read and reproduce the data of the digital signal processing unit An interface circuit section 63 for outputting the data to the normal decryption circuit section or outputting the same to the ordinary decryption circuit section, a modem 71 for transmitting or receiving unique disk information data, a memory 73 for temporarily storing the data, and each of the above components. And a sub-control unit 67 for controlling the control unit and notifying the control unit 41 of the reproduction application signal.

The BCA processor 61 processes and decodes the unique number of the disc stored in the BCA, which is a specific area in the lead-in area, and the modem 71 activated by the control unit 41 transmits it to the external server. When the reproduction permission signal is issued from the server, it is received by the modem 71 again, and the sub-control unit 67 informs the control unit 41 of the reproduction permission command therefrom.

The control section 41 thus starts playback of the title recorded on the disc, receives the digital signal processed data, and decrypts it in the dedicated decryption circuit section 65 according to the data type to the output circuit section 39. send. In the case of data recorded in the normal ECC, the decryption is output as it is without decryption so that the normal decryption circuit unit 57a processes it.

The memory 73 is used to temporarily store transmitted and received data. In some cases, the memory 73 may be used for receiving a specific message or advertisement from a server and providing the same to a user.

As described above, the disc player of the present invention can play a normal DVD as well as play a remote rental-only disc and control its rental, so that it can be used as a terminal of a remote rental control system or as a normal DVD player. There is an advantage to this.

In addition, since the disc of the present invention has data having the same structure as that of a normal DVD in a predetermined area, a normal playback device can transmit a message for notifying the user that the disc is the minimum for remote rental.

Claims (6)

A first area reserved for storing data according to the first error correction method; And a second area reserved for storing data according to a second error correction method different from the first error correction method. The third region of claim 1, further comprising: a third region reserved for buffering the switching of the data according to the first error correction method and the data according to the second error correction method at physical boundaries between the first region and the second region. Record medium comprising a. And a first area reserved for storing data according to a first error correction method, and a second area reserved for storing data according to a second error correction method different from the first error correction method. An apparatus for reproducing a recording medium, comprising: reading means for reading data recorded on the recording medium; And control means for controlling an error correction method of commercially available data depending on which part of the first area or the second area is scanned by the reading means. 4. The recording medium of claim 3, wherein the recording medium buffers switching between data according to the first error correction method and data according to the second error correction method at physical boundaries between the first area and the second area. And a reserved third area, wherein the control means of the playback apparatus prepares for switching the data error correction method according to whether the reading means scans the third area. Media playback device. And a first area reserved for storing data according to a first error correction method and a second area reserved for storing data according to a second error correction method different from the first error correction method. A reproduction method of a recording medium, comprising: reading data to be recorded on the recording medium; And controlling the error correction method of the corresponding data depending on which part of the first area or the second area is read by the reading means. 6. The third region of claim 5, wherein a third region is provided at a physical boundary between the first region and the second region to buffer the switching of data according to the first error correction scheme and data according to the second error correction scheme. And the control step of the playback apparatus prepares the switching of the data error correction method in accordance with whether or not the third area is scanned.

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