KR19980075469A - How to warn region code mismatch on DVD ROM drive - Google Patents

Abstract

According to the present invention, when driving the DVD-ROM drive, the region code of the DVD disc inserted in the deck and the region code of the drive are different from each other. The present invention relates to a method of mismatching warning. To this end, when the selection command signal of the DVD-ROM drive is received from the host according to a user's operation, the deck of the DVD-ROM drive is driven in a playback mode, thereby inserting a DVD inserted into the deck. Reading additional information including the area code recorded on the disc; Extracting and analyzing region code information from the read additional information, and temporarily storing the analyzed DVD disc region code information in a memory space; Transmitting additional information excluding the read area code information to the host-side monitor, and then switching the deck to the pause mode and waiting for the next command; Checking whether the region code of the DVD-ROM drive itself and the region code of the stored DVD disc are identical when a command signal for executing the playback operation is received from the host while the command signal is input; If the DVD code matches the region code of the DVD-ROM drive and the region code of the stored DVD disc, driving the deck in the playback mode to read the content information recorded on the DVD disc; And if the region code of the DVD-ROM drive and the region code of the stored DVD disc do not match, extracting the warning message pre-stored in a predetermined space of the memory and transmitting the warning message to the host for display on the host side monitor. Include.

Description

How to warn region code mismatch on DVD ROM drive

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video disc system (hereinafter abbreviated as DVD) system, and more particularly, to play (or read) a DVD disc using a DVD-ROM drive. A region code mismatch warning method in a DVD-ROM drive suitable for warning the region code mismatch between the drive itself and a DVD disc.

As is well known, the DVD system, which has recently been drafted (standard published in October 1996) and is commercialized, has a digital recording method and a non-contact playback method. In this respect, it is similar to a CD system. Do.

In addition, the DVD system is similar to a conventional CD system, such as a DVD-ROM for reproduction only, a DVD-R (recodeble) that can be recorded once like a CD-R, and can be recorded, erased, rewritten, and the like. There are kinds of DVD-RAM and the like, in which the present invention relates to improved performance in a DVD-ROM drive dedicated to reproduction.

In addition, DVD has a higher recording density than CD, which has a higher recording density, which means that CD uses infrared light having a wavelength of 780mm while DVD displays red visible light having a wavelength of 635mm. Because it uses. In other words, CD has a track pitch of 1.6 μm and a shortest distance between feet / land is 0.83 μm, whereas a DVD has a track pitch of 0.74 μm and a shortest distance between feet and land of 0.4 μm.

On the other hand, as mentioned above, DVD has a digital recording method, and one of the advantages of such digital data is that the quality of the original can be maintained no matter how many times it is copied (or duplicated). Thus, without taking countermeasures against copy protection, DVDs will never be free from illegal copying.

On the other hand, according to the 1996 draft standard, DVD systems are country coded. In other words, it divides the world by region and supplies hardware (DVD system) and software (DVD title) by region.

For example, according to the standard, the first zone to the United States, Canada, the second zone to Europe, the Middle East, South Africa, Japan, the third zone to Korea, Southeast Asia, Hong Kong, and the fourth zone to Australia, New Zealand, and Mexico. Including Latin America, the fifth region is set to Africa, Russia, India, and the sixth region to China.

Therefore, by distributing hardware and software by region, if the region wants to play or record software using different hardware, the region code is different so that the actual execution is impossible, so long as it prevents illegal copying. It could be a way. That is, a DVD player (or a DVD-ROM drive) purchased in a specific region can play only a DVD disc that actually contains the region code.

That is, the DVD system has a circuit (or software) for recognizing a code indicating a produced region, and a DVD disc contains a region code of the produced region. The region code of such a DVD disc is stored in the lead-in area of the disc, for example, and the TOC (Table of Contents) for control in which file content information, file directory information, file position information, and type of disc (DVD) are stored. ) Can be stored in the index information (also referred to as additional information or subcode) area.

On the other hand, in the case of playing (playing) a DVD disc using a DVD system divided by region as described above, as an example, the DVD system is a system produced in the first region, and the DVD disk to be played is a third one. Assuming that the disc is produced in the region, when the user plays the DVD disc in the third region using the DVD system of the first region, the play command is not performed due to the region code difference between the system and the disk. In this case, the user may be mistaken for the failure of the device (DVD player or DVD-ROM drive, etc.) because the DVD system does not perform the playback operation.

As an example, if a DVD-ROM drive is installed in the computer, the DVD-ROM drive may not be able to access the region code and the deck of the DVD-ROM drive even though the computer has issued a DVD disc play (play) command to the DVD-ROM drive. If the playback operation is not performed because the region code of the inserted DVD disc is different, the user may mistake it for a malfunction of the computer, a failure of the DVD-ROM drive, or damage of the DVD disc.

As a result, when a user directly inspects a computer or a DVD-ROM drive, or if it is difficult to check, a troublesome task such as contacting an after-sales service center and requesting a repair may be caused.

Accordingly, the present invention has been made in view of the above, and when the region code of the DVD disc inserted in the deck and the region code of the drive are different when the DVD-ROM drive is driven, it detects this and performs a message warning through the monitor. Its purpose is to provide a local code mismatch warning method for enabling DVD-ROM drives.

In order to achieve the above object, the present invention provides a DVD for reading content information recorded on a DVD disc containing a region code inserted into a deck of a DVD-ROM drive based on a command signal from an external host based on user operation. A method for warning mismatching of region codes in a -ROM drive, wherein the DVD-ROM drive analyzes the region code read from the DVD disc and detects when the read data is data to which a copy protection code has been applied. And a code processing means for processing, wherein the method comprises: driving a deck of the DVD-ROM drive in a playback mode upon receiving a selection command signal of the DVD-ROM drive from the host according to a user operation; A first step of reading additional information including the area code recorded on the inserted DVD disc; A second step of extracting and analyzing the region code information from the read additional information and temporarily storing the analyzed DVD disc region code information in a memory space; A third step of transmitting additional information excluding the read area code information to the host-side monitor for display, then switching the deck to the pause mode and waiting for the next command; A fourth step of checking whether or not the region code of the DVD-ROM drive and the region code of the stored DVD disk are identical when a command signal for executing a playback operation is received from the host while the command signal is input; If the region code of the DVD-ROM drive itself and the region code of the stored DVD disc coincide with each other as a result of the check in the fourth step, the deck is driven in a playback mode to read the content information recorded on the DVD disc. A fifth step; And if the region code of the DVD-ROM drive itself and the region code of the stored DVD disc do not coincide with each other, the warning message pre-stored in a predetermined space of the memory is fetched to the host. It provides a region code mismatch warning method in a DVD-ROM drive having a sixth step of transmitting and displaying on a host-side monitor.

1 is a schematic block diagram of a DVD-ROM drive system suitable for applying a method for warning a mismatch of a region code in a DVD-ROM drive according to the present invention;

2 is a flow chart illustrating a process of warning for mismatching of region codes in a DVD-ROM drive in accordance with a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

102: control block 104: servo control block

106: Driver 108: Deck

110: disk 112: RF block

114: digital signal processing block 116: memory

118: code processing block 120: interface block

122: monitor

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

1 shows a schematic block diagram of a DVD-ROM drive system suitable for applying a method of warning for mismatching of region codes in a DVD-ROM drive in accordance with the present invention.

As shown in the figure, the DVD-ROM drive system includes a control block 102, a servo control block 104, a driver 106, a deck block 108, an RF block (medium frequency amplification block) 112, Digital signal processing block 114, memory 116, code processing block 118, and interface block 120. Here, the monitor 122 displays a warning message (e.g., "Playback is not possible because the disc's region code is different") when a mismatch of the region code is detected according to the present invention, for example a computer monitor. Can be.

Referring to FIG. 1, the control block 112 is a microprocessor that performs overall operation control of a DVD-ROM drive. The control block 112 is a computer (or a keypad of a DVD player) not shown through the interface block 120 described later. Operation control corresponding to various commands provided from the unit is performed.

For example, when a user presses a deck open key provided on a front panel or the like to load a DVD containing a title on a deck of a DVD-ROM drive, the deck block block (eg, the control of the servo control block 104 and the driver 106) is controlled. 108) to open the deck, with the deck open and the disc (DVD) inserted into the deck and the deck closed according to the user's operation, select the drive of the DVD-ROM drive from the computer (or DVD player keypad) When a command signal for the control signal is received through the interface block 120, the control block 102 performs deck information (playback mode) for additional information of the TOC (Table of Contents) for control in the lead-in area of the disc. Index information or subcode) is read out and stored in a predetermined space of the memory 116, and the DVD-ROM drive is switched to the pause mode.

Here, the index information of the TOC includes file content information, file directory information, file position information, type of disc (DVD) information, region code information, and the like. It is provided to the computer via the interface block 120 and displayed on the monitor. Thus, the user may select and play the desired file contents of the file contents or the file directory displayed on the monitor.

In addition, in the control block 102, when a command signal for playback is received from the computer according to a user's operation, the DVD disc (DVD disc inserted into the deck for playback) region code information, which is transmitted in the code processing block 118, which will be described later. Checks whether the region code of the DVD-ROM drive and the region code of the DVD-ROM drive match, and when the region code of the DVD-ROM drive matches the region code of the DVD-ROM drive, the DVD-ROM drive is operated in the playback mode to perform the playback operation. If it is determined that the region code of the DVD disc and the region code of the DVD disc do not match, a warning message is sent to the computer (or the display side of the DVD player) without executing the play mode, for example, a predetermined space of the memory 116. Withdraws a warning message such as “The disc cannot be played because the region code of the disc is different” and saves it through the interface block 120. Transfer it to your computer.

Thus, the user may recognize that playback is not possible due to region code mismatch between the DVD-ROM drive and the DVD disc by checking the warning message displayed on the monitor.

The servo control block 104 is composed of a plurality of servos, for example, a focusing servo, a tracking servo, an optical transport servo, a spindle servo, an automatic power control (APC) servo, and the like. Control the drive of the driver 106 to operate the deck block 108 based on the control signal from the &lt; RTI ID = 0.0 &gt;) &lt; / RTI &gt; and the focus tracking servo error signal provided by the RF block 112 described later.

Next, the driver 106 is composed of, for example, an actuator driver, a spindle motor driver, a feed motor driver, a tray motor driver, and the like, and according to the control from the servo control block 104 described above, Controls the drive of the motor and actuator.

The deck block 108 is composed of a turntable for mounting a disc, a semiconductor laser, an optical system composed of an objective lens and a concave lens, an optical sensor, and the like. Accordingly, the optical signal is converted into a digital signal, that is, an intermediate frequency (RF) signal is generated through the optical sensor.

On the other hand, the RF block 112 amplifies the digital signal (subcode signal, playback video signal, etc.) output from the optical sensor in the deck block 108 to a level that can be sufficiently processed in the next stage, and shapes the waveforms. After performing the signal processing process of, and then to the digital signal processing block 114 of the next stage. In addition, the RF block 112 extracts an error signal for focus tracking servo from the signal output from the deck block 108 and provides it to the aforementioned servo control block 104.

On the other hand, the digital signal processing block 114 is, for example, a digital signal processor (DSP), and according to control from the control block 102, the digital signal provided from the above-described RF block 112 (i.e., To demodulate the control signal information (additional information or subcode) and actual data information such as a movie read from the DVD into a data sequence of the original signal, for example, converting a channel coded EFM signal into an 8-bit data sequence. Demodulation and the like, and processing such as error correction for removing burst errors or random errors due to disk damage, dust, and the like is performed.

At this time, the digital signal processing block 114 provides control signal information (additional information) to the above-described control block 102 when the DVD-ROM drive selection command signal is received from a computer, not shown, and is additional information. Area code information, file table information, file directory information, or the like is provided to the code processing block 118.

Next, the code processing block 118 analyzes the area code, which is the additional information read from the DVD disc, and provides the analyzed DVD disc area code information to the control block 102, and read data (actual data) It is checked whether or not the copy protection code is applied. If the digital data read as a result of the check is not the data to which the copy protection code is applied, the data is immediately transferred to the interface block 120. The digital data read as a result is checked by the copy protection code. In the case of applied data (i.e., encrypted data), the encrypted data is restored to the original signal before encryption (e.g., code data of compression-encoded video, audio, etc.), and then the restored data is stored in the interface block 120. To pass.

Therefore, in the control block 102, when a command signal for playback is received from the computer (or the DVD player keypad) via the interface block 120, the control block 102 is compared with the result of the comparison of the DVD-ROM drive area code with the read DVD disc area code. Based on this, the playback mode may be executed (region code matching) or a warning message may be transmitted (region code mismatching) to the interface 122 through the interface block 120 according to the present invention.

Finally, the interface block 120 performs a data interface between the DVD-ROM drive and a host (for example, a computer) not shown. The interface block 120 controls various command signals generated according to user operations and provided from the host. 102, and also actual data such as additional information and movies provided in the code processing block 118 to a host (e.g., an MPEG decoder provided on the computer hard when the host is a computer).

Next, a process of detecting when the region codes of the DVD-ROM drive and the DVD disc are different according to the present invention using the DVD-ROM drive system having the above-described configuration and displaying a warning message on the monitor It will be described in detail with reference to Fig. 2 mainly.

2 is a flowchart illustrating a process of warning of mismatching of region codes in a DVD-ROM drive according to a preferred embodiment of the present invention.

First, for the sake of better understanding, it is assumed as an example that a DVD-ROM drive displaying a warning message upon occurrence of mismatch of a region code is mounted on a computer according to the present invention.

Referring to FIG. 2, first, a user boots a computer and then selects a DVD-ROM drive, that is, a selection signal is input to the control block 102 via the interface block 120 (step 201), and the control block 102. In order to read the additional information inserted in the deck, the servo control block 104 and the driver 106 are driven to execute the regeneration mode (step 203).

Next, in the code processing block 118, the area code information in the additional information read from the DVD disc is extracted in accordance with the driving of the playback mode, and then the read area code is analyzed and provided to the control block 102. The control block 102 ) Stores this DVD region code information in a temporary space of the memory 116 (step 205).

In addition, the additional information read from the DVD disc inserted into the deck through execution of the playback mode, for example, the table of contents, the file directory, the file location, the type of the disc (DVD), etc., is stored in the predetermined space of the memory 116. At the same time, the file contents information and the file directory information are transmitted to the computer via the interface block 120 for display on the computer monitor (step 207).

Therefore, the user will be able to grasp the file type information and file information contained in the DVD disc through the file contents information and the file directory information displayed on the computer monitor.

Then, in the control block 102, when the reading of the additional information on the DVD disc inserted in the deck is completed, the current playback mode is switched to the pause mode and the next instruction from the computer is waited for (step 209).

Next, when a command signal for executing the playback operation is input from the computer via the interface block 120 (step 211), the control block 102 displays the region code information and the DVD of the DVD disc stored in the temporary space of the memory 116. -Check whether the region code of the ROM drive itself is identical (step 213).

As a result of the check in the step 213, if the area code of the read DVD disc and the area code of the DVD-ROM drive itself match, the deck is driven in the playback mode to perform data reproduction on the DVD disc (step 215). In this way, the playback data read from the DVD disc is transmitted to the monitor 122 of the computer via the interface block 120 (217). Thus, the monitor 122 will display the file selected by the user (e.g., a program such as a movie).

On the other hand, if it is determined that the region code of the read DVD disc and the region code of the DVD-ROM drive itself do not match, as a result of the check in step 213, the control block 102 does not execute the playback mode and executes the memory ( A warning message pre-stored in a predetermined space of 116, for example, "unable to play because the region code of the disc is different" is retrieved and transmitted to the computer monitor 122 through the interface block 120 ( Step 219).

Therefore, the computer monitor 122 displays a warning message “The disc cannot be played because the region code of the disc is different.” The user can confirm the warning message displayed on the monitor even if the playback operation of the DVD disc is not performed. You will recognize that playback is not possible due to the mismatch between the region code of the DVD-ROM drive and the region code of the DVD disc currently inserted in the deck.

As described above, according to the present invention, when a playback operation is not performed due to a region code mismatch (mismatch) between the DVD-ROM drive itself and the DVD disk when the DVD disk is to be played in the DVD-ROM drive, the monitor is operated. By displaying a warning message, you can be sure that you will not be mistaken for a computer or DVD-ROM drive failure or damage to a DVD disc.

Claims (4)

Mismatching of region codes in a DVD-ROM drive that reads the contents information recorded on a DVD disc containing a region code inserted in a deck of a DVD-ROM drive based on a command signal from an external host based on user operation In the method of warning, The DVD-ROM drive includes code processing means for analyzing the area code read from the DVD disc and detecting and processing when the read data is data to which a copy protection code has been applied, The method is: When the selection command signal of the DVD-ROM drive is received from the host according to a user's operation, the deck of the DVD-ROM drive is driven in a playback mode, and the region code contained in the DVD disc inserted in the deck is included. A first step of reading additional information; A second step of extracting and analyzing the region code information from the read additional information and temporarily storing the analyzed DVD disc region code information in a memory space; A third step of transmitting additional information excluding the read area code information to the host-side monitor for display, then switching the deck to the pause mode and waiting for the next command; A fourth step of checking whether or not the region code of the DVD-ROM drive and the region code of the stored DVD disk are identical when a command signal for executing a playback operation is received from the host while the command signal is input; If the region code of the DVD-ROM drive itself and the region code of the stored DVD disc coincide with each other as a result of the check in the fourth step, the deck is driven in a playback mode to read the content information recorded on the DVD disc. A fifth step; And If the region code of the DVD-ROM drive itself and the region code of the stored DVD disc do not match, a warning message pre-stored in a predetermined space of the memory is fetched and transmitted to the host. 6. A region code mismatch warning method in a DVD-ROM drive comprising a sixth step of displaying the same on a host side monitor. The method of claim 1, wherein the additional information read from the DVD disc and transmitted to the host is a file content and a file directory information. The method of claim 1 or 2, wherein the host is a computer. The method of claim 1 or 2, wherein the host is a DVD system.