JP3821234B2 - Optical disk playback device - Google Patents

Description

The present invention includes a system controller that controls each part of the apparatus in accordance with firmware from a flash memory, requires a CPPM device key for DVD audio playback, and CPRM for playback of a portion protected by CPRM in VR mode. The present invention relates to an optical disk reproducing apparatus that requires a device key and reproduces information recorded on an optical disk.

In recent years, optical discs such as DVDs (Digital Versatile Discs) have become widespread as recording media for recording audio information and video information. Information recorded on such optical discs is read and reproduced by light, so that information is copied between optical discs compared to reproducing recorded information such as magnetic tape, which has been used in the past. Or
Even when played back many times, the quality of the playback signal hardly deteriorates. Therefore, a big problem has arisen from the viewpoint of protecting the copyright of the information recorded on the optical disk. Therefore, it is very important to manage keys for encrypting contents such as audio information and video information and decrypting the encryption.

Therefore, for audio playback of the DVD audio standard, a CPPM (Content Protection for Prerecordable Media) device key is required on the optical disk playback device side,
In order to reproduce a video in the VR (Video Recording) mode of the DVD video standard, a device key of CPRM (Content Protection for Recordable Media) is required on the optical disk reproducing apparatus side.
JP 2002-9754 A

By the way, the device key as described above is written in a flash memory (EPROM, etc.) together with firmware etc. by a memory writing device using an optical disc in which a plurality of different device keys are recorded at the time of manufacture of the optical disc reproducing apparatus at the factory. The flash memory is mounted on the circuit board of the optical disk reproducing apparatus.

However, the optical disk playback apparatus having the flash memory in which the device key is written in this way is set to a test mode in a test process in a factory or the like, and an optical disk of a certain DVD audio standard is set in the optical disk playback apparatus, for example. Even if you try to play the specific information of the optical disc with the device key after inserting it, if you cannot play it, you cannot know the information about the device key. The problem that a lot of time is required arises.

In the prior art described in Patent Document 1, a plurality of generations and versions of different keys can be stored in a recording medium, and a newer key is stored in the recording medium when the recording / reproducing apparatus accesses the recording medium. In addition, the latest KRB from the recording medium is stored in the memory of the recording / playback apparatus itself, and unnecessary keys are deleted from the recording medium, so that all K stored in the recording medium are stored.
A recording / reproducing apparatus having a KRB newer than the RB is configured to record a new KRB on a recording medium even when content data is not recorded.

Therefore, this conventional apparatus uses a new KRB when data is recorded even if the recording medium is very old and the KRB stored in the recording medium is old. It is possible to increase the security of encrypted data, but it is not related to device key processing testing in the test process at factories, etc. Absent.

The present invention has been made to solve the above-described problems, and provides an optical disc playback apparatus having a function of specifying a device key when a problem occurs in processing that requires a device key. The purpose is to provide.

In order to achieve the above object, the invention of claim 1 includes a flash memory in which firmware for controlling each part of the apparatus is stored, and a system controller that controls each part of the apparatus in accordance with the firmware from the flash memory. For playback of DVD audio standard audio, a CPPM device key is required, and for playback of a portion protected by CPRM in the DVD video standard VR mode, a CPRM device key is required for playback of information recorded on the optical disc. In the optical disk playback apparatus, a device key optical disk in which a plurality of different device keys are recorded is prepared in advance, and the information processing apparatus reads the device key from the device key optical disk, and the read device key The device key Information on the date on which the device key was read, information on the name of the optical disk for the device key from which the device key was read, information on the name of the file in which the device key was recorded, and what device key of the file was used Of the optical disc reproducing apparatus in which the additional information including the information indicating whether or not the device key has been added and the device key information with the additional information added to the device key is written to the flash memory and the flash memory is mounted In the controller, the test mode setting means for setting to the test mode, the additional information display setting means for setting the additional information of the device key information to be displayed when the test mode is set after the test mode is set, and the setting The additional information of the device key information is displayed on the display means. To provide an optical disc reproducing apparatus is characterized by providing the additional information display processing means for performing processing for.

In this configuration, the information processing apparatus reads the device key from the device key optical disk, and the read device key includes information on the date when the device key is read, and the device key optical disk from which the device key is read. Additional information including information indicating the name of the file in which the device key is recorded, and information indicating which device key of the file is used, and the additional information is added to the device key. The device key information is output and written to the flash memory.

The system controller sets the optical disk playback device mounted with the flash memory to the test mode by the test mode setting unit, and sets the additional information display setting unit to display the additional information of the device key information when the test mode is entered. Then, the additional information display processing means performs processing for displaying additional information of the set device key information on the display means.

According to this configuration, if something goes wrong with the process that requires a device key,
The device key can be specified by the additional information, thereby shortening the time for investigating the cause of the failure and improving the test efficiency.

The invention of claim 2 includes a flash memory in which firmware for controlling each part of the device is stored, and a system controller that controls each part of the device in accordance with the firmware from the flash memory. A device key corresponding to the audio standard is required, a device key corresponding to a predetermined video standard is required for playing a video at a predetermined location, and different in each optical disc playback apparatus for playing back information recorded on the optical disc. Reads the device key from the device key optical disc in which a plurality of device keys are recorded, adds additional information to the read device key, and writes the device key information with the additional information added to the device key to the flash memory Execute the flash memory When the system controller enters the test mode and is set to display the additional information of the device key information for the optical disc reproducing apparatus, the processing for displaying the additional information of the device key information on the display means is performed. Provided is an optical disk reproducing device characterized in that the above is performed.

In this configuration, additional information is added to the device key read from the device key optical disk and written to the flash memory, and the system controller enters the test mode for the optical disk playback device mounted with the flash memory. When the additional information of the device key information is set to be displayed, a process for displaying the additional information of the device key information on the display means is performed.

According to this configuration, if something goes wrong with the process that requires a device key,
The device key can be specified by the additional information, thereby shortening the time for investigating the cause of the failure and improving the test efficiency.

In the invention of claim 3, the additional information is information on a date when the device key is read,
Information on the name of the optical disk for the device key from which the device key was read, information on the name of the file in which the device key was recorded, information indicating which device key of the file was used, and other devices Since the key information is included, the device key can be easily identified by examining the additional information.

According to a fourth aspect of the present invention, the system controller sets the test mode setting means for setting the test mode, and displays the additional information of the device key information when the test mode is set after the test mode is set. Since the additional information display setting means and the additional information display processing means for performing processing for displaying the additional information of the set device key information on the display means are provided, the device key can be specified by the additional information. Become.

According to the fifth aspect of the present invention, the CPPM device key is required for reproducing the audio of the DVD audio standard, and the CPRM device key is necessary for reproducing the portion protected by the CPRM of the VR mode which is the DVD video standard. Since information can be reproduced with respect to the optical disc, an optical disc reproducing apparatus capable of reproducing information on an optical disc protected by such CPPM or CPRM can be obtained.

As described above, according to the present invention, a device key optical disk in which a plurality of different device keys are recorded is prepared in advance, and the information processing apparatus reads the device key from the device key optical disk. Information on the date on which the device key was read, information on the name of the optical disk for the device key from which the device key was read, information on the name of the file in which the device key was recorded, Adds information indicating the device key used in the file and additional information including information related to other device keys, writes the device key information with additional information added to the device key to the flash memory, and In the system controller of the optical disk playback device with memory mounted, Test mode setting means for setting to the test mode, additional information display setting means for setting the additional information of the device key information to be displayed when the test mode is set after the test mode is set, and the set Since the additional information display processing means for performing processing for displaying the additional information of the device key information on the display means is provided, the device key is specified by the additional information when a problem occurs in the processing that requires the device key. As a result, it is possible to reduce the time for investigating the cause of the failure and improve the test efficiency.

Further, according to the present invention, a device key is read from a device key optical disc in which a plurality of different device keys are recorded, additional information is added to the read device key, and additional information is added to the device key. When the device controller is set to write the device key information to the flash memory and display the additional information of the device key information for the optical disk playback device mounted with the flash memory in the test mode, Since the process for displaying the additional information of the device key information on the display means is performed, it becomes possible to identify the device key by the additional information when any trouble occurs in the process that requires the device key. , Reduce the time to investigate the cause of defects, improve test efficiency

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an optical disc reproducing apparatus according to an embodiment of the present invention. In FIG. 1, this optical disk reproducing apparatus includes an optical pickup 3 that emits laser light and reproduces reflected light from the optical disk 1 to reproduce information recorded on the optical disk 1, and a spindle motor 2 that rotates the optical disk 1. A spindle drive circuit 19 that drives the spindle motor 2, a tracking drive circuit 17 that drives a tracking actuator that performs tracking servo of the optical pickup 3, and a focus drive circuit 16 that drives an actuator that performs focus servo of the optical pickup 3. A sled 4 that moves the optical pickup 3 in the radial direction of the optical disc 1, and a sled drive circuit 18 that drives the sled 4.

The optical disk reproducing apparatus also includes an RF amplifier 5 that inputs a reproduction signal (read signal) from the optical disk 1 during reproduction of the optical disk 1 and creates and amplifies an RF signal from the reproduction signal;
A data / synchronization signal separation circuit 6 having a PLL (phase locked loop) 8 including a VCO (voltage controlled oscillator) and receiving an RF signal from the RF amplifier 5 to separate the data and the synchronization signal, and this data / synchronization signal separation A data decoding error correction circuit 9 that performs error check by inputting the data separated by the circuit 6 and decoding it, and if the data has an error, corrects the error and outputs correct data, and this data decoding error correction An AV decoding circuit 10 is provided which inputs correct data from the circuit 9 and decodes it to output a video signal and an audio signal.

In addition, this disk reproducing apparatus includes a mirror detection circuit 7 that detects a mirror signal that is included in an RF signal from the RF amplifier 5 and indicates a mirror surface without a track on the optical disk 1 and counts the mirror surface, and an optical pickup 3. A tracking error detection circuit 11 for detecting a tracking error signal included in the reproduction signal, a focus error detection circuit 12 for detecting a focus error signal included in the reproduction signal from the optical pickup 3, and a tracking from the tracking error detection circuit 11. And a track cross detection circuit 13 for detecting a track cross based on the error signal and outputting a track pulse.

In addition, the optical disk reproducing apparatus includes a flash memory 20 in which firmware for controlling each unit (each component described above) is stored, a CPU 15 that performs processing of the entire apparatus according to the firmware of the flash memory 20, and A system controller 14 is provided for controlling each of the above components in accordance with instructions from the CPU 15.

The system controller 14 performs control for focus servo of the optical pickup 3 based on the focus error signal included in the reproduction signal from the optical pickup 3, and the optical pickup based on the tracking error signal included in the reproduction signal from the optical pickup 3. 3 for tracking servo, control for driving the sled 4 via the sled drive circuit 18 to move the optical pickup 3 in the radial direction of the optical disc 1, control for rotating the spindle motor 2 via the spindle drive circuit 19 Etc.

Further, the system controller 14 displays the additional information of the device key information when the test mode is set after the test mode setting means 141 for setting the optical disc reproducing apparatus to the test mode and the test mode is set. Additional information display setting means 142 for setting, and additional information display processing means 143 for performing processing for displaying additional information of the set device key information on the display means are provided. The display means can be realized by a TV monitor (not shown) connected to the AV decoding circuit 10 or a display unit (not shown) provided in the playback apparatus main body.

FIG. 2 is a block diagram for explaining processing of the information processing apparatus that extracts a device key from the device key optical disk, adds additional information to the device key, outputs the device key information, and writes it in the flash memory in the present embodiment. It is.

In FIG. 2, reference numeral 101 denotes a device key optical disk on which a plurality of different device keys are recorded. Such an optical disk for a device key is realized by a CD-R or the like, and is purchased in units of thousands or tens of thousands, and one device key is cut out and written in the flash memory. The device key optical disk 101 records, for example, device keys K1, K2, K3,..., KN, K (N + 1).

The information processing apparatus 100 reads a device key from the device key optical disk 101, and the read device key includes information on the date when the device key was read, and the name of the device key optical disk from which the device key was read. Information on the name of the file in which the device key was recorded, information indicating which device key of the file was used, and other additional information including information on the device key, and the device key. The device key information to which the additional information is added is written into the flash memory. The information processing apparatus 100 also has a ROM writer function. In the case of an information processing apparatus that does not have a ROM writer function, the output device key information may be written into the flash memory by the ROM writer.

The device key information read from the device key optical disk 101, for example, with the additional information a added to the device key K1, is written in the flash memory of the optical disk reproducing apparatus A. The device key information obtained by adding the additional information b to the device key K3 is written in the flash memory of the optical disc playback apparatus B. In this way, by adding additional information to the device key, it is possible to know information about the device key stored in the flash memory of the optical disc playback apparatus.

That is, the information about the device key includes the date when the device key was read from the device key optical disk, the name of the device key optical disk from which the device key was read,
The name of the file in which the device key was recorded, information indicating which device key of the file was used, information on which production line was written, and the device number of the information processing apparatus used for processing related to the device key Say the information.

FIG. 3 is a flowchart showing a process of writing device key information to the flash memory. The flash memory writing process will be described with reference to this flowchart.

The information processing apparatus 100 on which the device key optical disk 101 is set selects and extracts one device key from the optical disk 101 (step S1), adds additional information to the device key (step S2), and plays the selected optical disk. Write device key information to a specific address (block in a different area from the program area) in the flash memory of the device (
Step S3). It should be noted that when manufacturing the optical disc playback apparatus in the factory, the device key information may be written in the flash memory together with the firmware when writing the firmware in the flash memory in the optical disc playback apparatus.

FIG. 4 is a flowchart showing a process from when the optical disk reproducing apparatus enters the test mode until the additional information of the device key information is displayed. Device information display processing will be described with reference to this flowchart.

As described above, the device key information is stored in the flash memory, and in order to perform a test on the device key for the optical disk playback apparatus on which the flash memory is mounted, the factory inspector must operate the operation unit (see FIG. (Not shown) to operate the keys to enter the test mode. In response to this, the test mode setting means 141 of the system controller 14 sets the apparatus to the test mode (step S11).

When the test mode is entered (step S12), the additional information display setting means 142 is set to display the additional information of the device key information (step S13), whereby the additional information display processing means 143 is set to display the device information. The additional information of the key information is displayed on a display means such as a TV monitor (not shown) or a display unit of the device (step S14). Here, only the additional information is displayed and the device key is not displayed because the device key is protected, and once released, the device key is a key provided in advance in the optical disc playback apparatus. This is because it is invalidated by the invalid function.

If the contents of the additional information displayed on the display means are viewed, the date when the device key was read from the device key optical disk, the name of the device key optical disk from which the device key was read, and the device key are recorded. It is possible to know the name of the file that was stored, what device key of that file was used, which production line it was written on, the device number of the information processing device used for the processing related to the device key, and the like.

In this way, in the test mode, the device key itself cannot be seen, but additional information can be seen, so even if the device key is made public and invalid, if you look at the additional information of the device key at that time It becomes possible to identify the device key that has become invalid. Therefore, when some trouble occurs in the process that requires the device key, it becomes possible to specify the device key by the additional information, thereby reducing the time for investigating the cause of the trouble and improving the test efficiency. .

The device key described in the present embodiment refers to a CPPM device key in the case of DVD audio standard audio reproduction, and refers to a CPRM device key in the case of DVD video standard video reproduction. One device key is recorded in the flash memory of each optical disk playback device, which means that the CPPM device key and the CPRM device key are different for each optical disk playback device.

It is a block diagram which shows the structure of the optical disk reproducing | regenerating apparatus concerning one Embodiment of this invention. FIG. 3 is a block diagram for explaining processing of an information processing apparatus that extracts a device key from a device key optical disc, adds additional information to the device key, outputs device key information, and writes the device key information in the flash memory in the embodiment. 4 is a flowchart illustrating a process of writing device key information to a flash memory in the embodiment. 4 is a flowchart showing a process from when the optical disc playback apparatus of the embodiment enters a test mode until it displays additional information of device key information.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 14 System controller 20 Flash memory 100 Information processing apparatus 101 Device key optical disk 141 Test mode setting means 142 Additional information display setting means 143 Additional information display processing means

Claims (5)

Equipped with a flash memory that stores firmware for controlling each part of the device, a system controller that controls each part of the device according to the firmware from this flash memory, and requires a CPPM device key for DVD audio standard audio playback For playback of the part protected by the VR mode CPRM of the DVD video standard,
In an optical disk reproducing apparatus that requires an RM device key and reproduces information recorded on an optical disk, a device key optical disk on which a plurality of different device keys are recorded is prepared in advance, and the device is processed by the information processing apparatus. A device key is read from the key optical disc, and the read device key includes information on the date when the device key was read, information on the name of the device key optical disc from which the device key was read, and the device key Is added to the device key, and information on the name of the file in which the file is recorded, information indicating what device key of the file was used, and other information including information on the device key are added. Write the device key information to the flash memory and In the system controller of the optical disk playback apparatus mounted with the memory, the test mode setting means for setting to the test mode and the setting to display the additional information of the device key information when the test mode is set after the test mode is set An optical disc reproducing apparatus comprising: additional information display setting means; and additional information display processing means for performing processing for causing the display means to display additional information of the set device key information. A device that includes a flash memory in which firmware for controlling each part of the device is stored, a system controller that controls each part of the device according to the firmware from the flash memory, and that is compatible with a predetermined audio standard for audio playback A key is required, and a device key corresponding to a predetermined video standard is required for playback of a video at a predetermined location, and a plurality of different device keys are recorded in an optical disc playback apparatus that plays back information recorded on an optical disc. The device key is read from the device key optical disk, the device key information obtained by adding additional information to the read device key is written in the flash memory, and the optical disc playback apparatus mounted with the flash memory is connected to the system. Conte The optical disc playback apparatus is characterized in that when it enters the test mode and is set to display the additional information of the device key information, the additional information of the device key information is displayed on the display means. . The additional information includes information on the date when the device key was read, information on the name of the optical disk for the device key from which the device key was read, information on the name of the file in which the device key was recorded, the file 3. The optical disk reproducing apparatus according to claim 2, further comprising: information indicating which device key is used, and other information related to the device key. The system controller includes: a test mode setting unit that sets a test mode; an additional information display setting unit that sets the additional information of the device key information to be displayed when the test mode is set after the test mode is set; 3. The optical disk reproducing apparatus according to claim 2, further comprising additional information display processing means for performing processing for displaying the set additional information of the device key information on the display means. The playback of DVD audio standard audio requires a CPPM device key, and DV
The information can be reproduced on an optical disc that requires a device key of CPRM for reproduction of a part protected by CPRM in VR mode which is a D video standard. Optical disk playback device.

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