JPH11143642A - Control code initialization device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a region code by a general user from being initialized in a DVD-video reproduction device. SOLUTION: A region code holding part 9, a region code initialization mode switch part 5 for permitting the initialization of the region code and analysis means 4 and 7 which previously store the password of prescribed bit length and an interface code are provided in a region code initialization device 1. At the time of switching an initialization mode, the signal line of the initialization mode is judged and the mode is switched before and after the resetting of the reproduction device 1 is released. When the inputted password and the password stored in the interface code are matched with the interface code, the region code is updated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control code initialization device for a disk drive, and more particularly to a control code initialization device for a disk drive.
It relates to a region code initialization device of a VD-Video playback device, and has a feature in updating a region code that divides the world into six regions.

[0002]

2. Description of the Related Art Conventionally, with respect to accessible means using a password, at least one password is stored in a control device in advance, a password is input, and this password matches a password stored in the control device. A control device that sends an execution command is known.

[0003] In a disk drive device holding control codes by hardware, a method is known in which the control codes are switched by jumper switches, or the control codes are set and fixed for each section divided by the control codes. ing.

[0004]

The control code is, for example, a region code in a DVD device is a DVD-ROM.
Video and DVD-Video playback devices are used to control whether or not DVD-Video can be played back in each region by dividing the world into six regions by using codes held respectively. In a DVD-Video playback device that holds a region code by hardware, when the region code is switched by a jumper switch, a general user sets the region code to the DVD-Video playback device.
-There is a possibility that the DVD-Video may be initialized arbitrarily so as to match the region code described in the Video.
o, the function of limiting the output of the reproduced image may be impaired.

If the region code of the DVD-Video playback device is fixed for each corresponding region, it is necessary to change the parts of the region code holding section of the DVD-Video playback device for each region at the manufacturing stage. There was a problem.

[0006]

In order to solve the above-mentioned problems, a control code initialization apparatus according to the present invention comprises a disk drive storing a control code corresponding to a reproduction control code on a disk recording medium, In the control code initialization device for updating, control code holding means in the control code initialization device, control code initialization mode switching means for permitting initialization of the control code,
Analyzing means for preliminarily storing and analyzing at least one code having a predetermined bit length, wherein the initialization mode switching means pre-stores a code within a predetermined period after reset release during reset control of the disk drive device; The initialization mode is set to a predetermined value to set the activation mode to active, the predetermined bit length code is input, and the initialization mode is activated and the input predetermined bit length code matches the stored code. In this case, the control code is updated in such a case.

According to the present invention, it is possible to prevent a general user of the disk drive from initializing the control code without permission. Also, there is no need to change the parts of the disk drive device for each section corresponding to the control code,
By using the control code initialization device to initialize the control code in the same disk drive device, it is possible to cover all the sections indicated by the control code.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a control code initialization apparatus according to a first aspect of the present invention, a disk drive holds control codes corresponding to a reproduction control code on a disk recording medium. Control code initialization device for updating the control code by having an interface unit for activating the reading of a control code from the memory and an analyzing unit for storing and analyzing a first code of a predetermined bit length for controlling the interface unit in advance A control code initialization mode switching means for permitting initialization of the control code, and an analysis means for preliminarily storing and analyzing a second code having a predetermined bit length, wherein the initialization mode switching means performs initialization. Switch the mode to active, input the first code and the second code, and When the input first code and second code match the stored first code and second code, respectively, the control code is updated. The control code used at the time of reproduction of the apparatus can be used, and it is possible to prevent a general user from arbitrarily initializing the control code by a simple method.

Next, a control code initialization apparatus according to a second aspect of the present invention is a control code initialization apparatus in which a disk drive holds a control code corresponding to a reproduction control code on a disk recording medium and updates the control code. In the control code initialization device, a control code holding unit, a control code initialization mode switching unit for permitting initialization of the control code, and a first code and a second code having a predetermined bit length are stored in advance. Analyzing means for storing and analyzing, wherein the initialization mode switching means sets the value to a predetermined value within a predetermined period after the reset release of the disk drive device and switches the initialization mode to active; And the second code are input, the initialization mode is active, and the input first and second codes are stored, respectively. The control code is updated when the first code and the second code are matched, thereby preventing a general user of the disk drive from initializing the control code without permission. It is not necessary to change the parts of the disk drive for each section corresponding to the control code, and all the sections indicated by the control code can be covered using the control code initialization device in the same disk drive. Control code can be initialized.

A control code initialization apparatus according to a third aspect of the present invention is characterized in that the control code initialization apparatus according to the first aspect has at least one kind of the predetermined bit length code. As the number of types increases, it becomes more difficult to illegally update the control code.

(Embodiment) The first, second and third embodiments of the present invention will be described below, taking as an example the initialization of a region code of a DVD-Video playback apparatus. This will be described with reference to FIGS.

FIG. 1 shows a DVD-Vid embodying the present invention.
FIG. 3 is a block diagram of a region code initialization device in the eo playback device.

In FIG. 1, reference numeral 1 denotes a region code initialization device, 2 denotes a local bus connected to the region code initialization device 1, and is connected to a local bus interface unit 3 via a local bus 2. Reference numeral 4 denotes a password analysis unit for analyzing a password for initialization of a region code sent from the local bus 2 and the local bus interface unit 3, and 5 a control unit for controlling whether or not to permit the initialization of the region code. A region code initialization mode switching unit 6, a region code writing unit for writing a new region code sent from the local bus 2 and the local bus interface unit 3 into a region code holding unit 9;
Reference numeral 7 denotes an interface code analysis unit that analyzes interface codes sent from the local bus 2 and the local bus interface unit 3 and controls whether to activate an interface with the region code holding unit 9, and 8 denotes a region code holding unit 9 is a region code interface unit that controls an interface for writing and reading a region code to / from the region 9.

[0014] DVD-Video playback device (not shown)
Is a DVD-V to be compared with the region code described in the DVD-Video to be reproduced.
It has a region code holding unit 9 for holding a region code of the video playback device, and compares the region code written on the DVD-Video with the region code of the DVD-Video playback device at the time of DVD-Video playback. It controls whether or not to output a -Video playback image, and includes a region code reading unit 10 for reading a region code of the DVD-Video playback device from the region code holding unit 9.

Next, the operation of the region code initialization apparatus 1 will be described with reference to the flowchart of FIG. 2 and FIGS. First, the initialization mode switching operation (step 1) of the region code initialization device 1 in the reset operation of the DVD-Video playback device will be described.

In FIG. 3, (a) is a base clock for operating the region code initialization device, and initialization switching is performed in synchronization with this clock. FIG. 3 (c)
When the reset signal is input at time t2, the initialization mode switching signal is latched at time t1 before reset release, and the initialization mode switching signal is latched at time t3 after reset release. That is, before and after the reset signal is released, the initialization mode switching signal is detected and the region code initialization mode is controlled. The initialization mode switching signal before the reset release is at L level and the 8-bit interface code after the reset is released. Until the region code is set, the region code initialization mode is activated by inputting the H level to the initialization mode switching signal. At time t4, when the interface code is set, the initialization mode switching signal is set to a predetermined value by the time the interface code is set.
The security is so high that ordinary users cannot easily initialize the region code.

Next, in step 2, step 3, step 4, and step 5, the password and the interface code for initializing the region code are input to the region code initializing device 1 through the local bus 2, and the 32-bit password is input. Is stored in a register (not shown) in the password analysis unit 4 with two 16-bit accesses.
The 8-bit interface code is set in a register (not shown) in the interface code analysis unit 7 by 8-bit access, and is compared with the 32-bit password held in each analysis unit and the 8-bit interface code. It is determined in step 6 whether or not the codes match, together with the initialization mode. The 32-bit password is transferred to the register in the password analysis unit 4 by the password analysis unit 4 with 16-bit access twice, but when the transfer is performed using 8-bit, 24-bit, or 32-bit access, The password is discarded without being set in the register. The analysis result in the interface code analysis unit 7 is transferred to the region code interface unit 8.

By adjusting the bit length of the password and the interface code, or by making at least one of the codes unique to the DVD-Video reproducing apparatus, the analysis of the codes can be made difficult.

In step 6, the initialization mode is ON
When it is determined that the 32-bit password and the 8-bit interface code match, the next step 7
, The region code writing is enabled.
If the region code initialization mode is OFF or if at least one of the values does not match the value stored in the region code initialization device 1 in the password analysis or interface analysis, the region code initialization in step 10 is performed. It will be in the end state. Therefore, step 7
In step 6, the region code initialization mode is ON, and both the password and the interface code match the values stored in the region code initialization device. Indicates that a new region code can be written.

Next, in steps 8 and 9, in the region code write enable state,
A new region code is received from the local bus 2 through the local bus interface unit 3, and a new region code is set in the region code holding unit 9 and initialized.

Step 10 is a state in which the region code initialization has been completed. In step 6, whether the region code initialization mode in step 1 is OFF or whether the password set in step 2 or the interface code set in step 4 is selected. If at least one of them does not match the value stored in the region code initialization device 1, or if the region code of the DVD-Video playback device is initialized in step 9, the password analysis unit 4 Is cleared, and the region code initialization operation of the DVD-Video playback device is terminated. Therefore, the initialization of the region code means that the region code held by the DVD-Video playback device is updated to a new region code.

D having an initialized region code
In the VD-Video playback device, when the DVD-Video image data is played back by the region code holding unit 9,
VD-Video region code and DVD-Vi
By comparing the region codes of the video playback device, the playback image of the DVD-Video
This controls whether or not to output in the region indicated by the region code of the video device. If the region codes do not match, DVD-Video is not reproduced.

[0023]

As described above, in a DVD-Video playback device holding a region code by hardware, when the region code of the DVD-Video playback device is initialized, the region code is not initialized. In consideration of security, a region code initialization mode for initializing a region code and a password having a predetermined bit length, and a predetermined bit length code for activating an interface with hardware holding the region code are provided. Set, the initialization mode is ON, and the password and code are DVD-V
The region code can be initialized only when the password matches the password and code stored in the video playback device.

At this time, the DVD-V used for reproduction
An interface code for activating reading of a region code in the video playback device can be used, and a high degree of security can be set by a simple method. This can prevent a general user from unnecessarily initializing the region code. DVD-Vi for each region corresponding to the region code
It is not necessary to change the components of the
By initializing the region code using the region code initialization device in the VD-Video playback device, it is possible to cover the entire area indicated by the region code.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control code initialization device according to an embodiment of the present invention.

FIG. 2 is a flowchart of initialization of a control code initialization device according to the embodiment of the present invention.

FIG. 3 is a timing chart for explaining an initialization mode switching operation of the control code initialization device according to the embodiment of the present invention.

[Description of Signs] 1 Region code initialization device 2 Local bus 3 Local bus interface unit 4 Password analysis unit 5 Region code initialization mode switching unit 6 Region code writing unit 7 Interface code analysis unit 8 Region code interface unit 9 Region code holding Department

Claims (3)

[Claims] 1. A disk drive device holds a control code corresponding to a reproduction control code on a disk recording medium,
At the time of reproduction, the control code is updated by including an interface unit for activating the reading of the control code from the disk drive device and an analysis unit for storing and analyzing a first code having a predetermined bit length for controlling the interface unit in advance. A control code initialization mode switching unit for permitting initialization of the control code, and an analysis unit for storing and analyzing a second code having a predetermined bit length in advance, wherein the initialization mode The switching unit switches the initialization mode to active, inputs the first code and the second code, and stores the input first and second codes when the initialization mode is active. A control code that is updated when the first code and the second code match each other. Synchronize devices. 2. A control code initialization device for holding a control code corresponding to a reproduction control code on a disk recording medium by a disk drive device and updating the control code, wherein a control code holding means is provided in the control code initialization device. And a control code initialization mode switching means for permitting initialization of the control code, and an analysis means for storing and analyzing a first code and a second code having a predetermined bit length in advance. The switching unit sets the value to a predetermined value within a predetermined period after the reset release of the disk drive device, switches the initialization mode to active, inputs the first code and the second code, and performs initialization. The mode is active and the input first code and second code
A control code updating apparatus that updates the control code when the first code and the second code match the stored first code and second code, respectively. 3. The control code initialization device according to claim 1, wherein any one of the codes is a code unique to a disk drive device.