JP4613392B2 - Disc playback device, disc recording device, disc recording / playback device, and disc playback method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc playback device, a disc recording device, a disc recording / playback device , and a disc playback method , and in particular, a disc playback device, a disc recording device, and a disc recording / playback device with a short start-up time during recording or playback of a disc , The present invention also relates to a disc playback method .
[0002]
[Prior art]
Conventional disks (including optical disks) include CD (Compact Disc, read-only), CD-RW (CD-Rewriteable, rewritable), DVD-ROM (Digital Versatile Disc-ROM, read-only), and DVD + RW (DVD + Rewriteable). Rewritable type), etc., and each disk has different physical characteristics such as physical format, file system, and video format.
[0003]
Therefore, disc recording / playback devices (including optical disc playback devices) perform discriminating disc types when inserting discs, and perform some adjustment processing (automatic adjustment) to optimize disc playback / recording performance. Yes.
[0004]
On the other hand, large-capacity nonvolatile memories have been very expensive, but in recent years have become relatively inexpensive.
[0005]
[Problems to be solved by the invention]
However, it is not preferable for the user (user) side to wait for the adjustment time (start-up time) of the automatic adjustment (poor response).
In addition, for example, as the disk rotation speed increases due to an increase in recording capacity or the like, adjustment processing must be performed for skew (disk tilt), vibration, and the like, and this poor response tends to increase more and more.
[0006]
Accordingly, a first object of the present invention is to provide a disc playback apparatus that shortens the time from when a disc is inserted until playback is possible.
A second object of the present invention is to provide a disk recording apparatus that shortens the time from disk insertion until recording becomes possible.
Furthermore, a third object of the present invention is to provide a disc recording / reproducing apparatus that shortens the time from when the disc is inserted until recording / reproducing becomes possible.
A fourth object of the present invention is to provide a disc playback method that shortens the time from when a disc is inserted until playback is possible.
[0007]
[Means for Solving the Problems]
In order to achieve the first object, the disk reproducing apparatus (first invention) of the present invention comprises disk individual identification information storage means for storing disk individual identification information for identifying each disk for each disk used for reproduction. Each of the discs used for reproduction includes automatic adjustment information storage means for storing automatic adjustment information corresponding to each disc, and individual identification information detection means for detecting individual identification information of the inserted disc, When the individual identification information for the inserted disc is stored in the disc individual identification information storage means, the automatic adjustment information corresponding to the individual identification information is extracted from the automatic adjustment information storage means and reproduced. It is characterized by.
[0008]
In this disk reproducing apparatus, the individual identification information of the disk once reproduced is stored in the disk individual identification information storage means, and when the disk is reproduced next time, the automatic adjustment corresponding to the disk is automatically adjusted from the automatic adjustment information storage means. Since the information is read and reproduced, the waiting time of the user can be shortened.
[0009]
In order to achieve the second object, the disk recording apparatus (second invention) of the present invention includes disk individual identification information storage means for storing disk individual identification information for identifying each disk for each disk used for recording. And an automatic adjustment information storage means for storing automatic adjustment information corresponding to each disk for each disk used for recording, and an individual identification information detection means for detecting individual identification information of the inserted disk, When the individual identification information for the inserted disc is stored in the disc individual identification information storage means, the automatic adjustment information corresponding to the individual identification information is extracted from the automatic adjustment information storage means and recorded. It is characterized by that.
[0010]
In this disk recording device, the individual identification information of the disk once recorded is stored in the disk individual identification information storage means, and when it is next recorded on the disk, the automatic adjustment corresponding to the disk is performed from the automatic adjustment information storage means. Since the information is read and recorded, the waiting time of the user can be shortened.
[0011]
Order to achieve the third object, the disk recording and reproducing apparatus of the present invention (third aspect), for each disk using the disk individual identification information storing disk individual identification information for identifying the respective disk individually Storage means; automatic adjustment information storage means for storing automatic adjustment information individually corresponding to each disk used; and individual identification information detection means for detecting the individual identification information of the inserted disk. When the individual identification information for the inserted disc is stored in the disc individual identification information storage means, the automatic adjustment information corresponding to the individual identification information is extracted from the automatic adjustment information storage means, Recording or reproduction is performed.
[0012]
In this disk recording / reproducing apparatus, the individual identification information of the disk once reproduced or recorded is stored in the disk individual identification information storage means, and when the disk is reproduced or recorded next time, the disk is automatically transferred from the automatic adjustment information storage means. Since the automatic adjustment information corresponding to is read and reproduced or recorded, the waiting time of the user can be shortened.
[0013]
In the first to third aspects of the invention, it is preferable that the disk individual identification information storage means and the automatic adjustment information storage means comprise a flash ROM. Since the flash ROM (for example, flash EEPROM) is inexpensive, the above means can be configured at low cost.
[0014]
Further, in the second and third inventions, the disk use history information is stored in the disk individual identification information means with a predetermined priority order, and is overwritten or deleted from a lower priority order. It is desirable. In this way, since the storage area is secured by overwriting or erasing information with low priority, it is possible to shorten the time until a frequently used disk or a recently used disk can be recorded and reproduced. . Further, the disk individual identification information means can be configured on a small scale.
[0015]
Further, in the apparatus according to the first to third inventions, an in-machine temperature detecting means for detecting the temperature in the apparatus is provided, and the stored value of the automatic adjustment information storing means is corrected according to the detected value of the in-machine temperature means. It is desirable to do. Thus, by correcting the stored value of the automatic adjustment information storage means, recording or reproduction can be performed more accurately.
In order to achieve the fourth object, the disk reproducing method of the present invention is a disk individual identification information storage for storing individual identification information for identifying each disk in the first storage means for each disk used for reproduction. A step, an automatic adjustment information storing step for storing in the second storage means automatic adjustment information corresponding to each disc for each disc used for reproduction, and individual identification for detecting individual identification information of the inserted disc An automatic detection information corresponding to the individual identification information from the second storage means when the individual identification information for the inserted disc is stored in the first storage means. And the reproduction is performed.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 is a block diagram showing a configuration of a main part of the optical disc recording / reproducing apparatus HD.
[0017]
The pickup 4 reproduces information recorded on the inserted disc 1 and controls the focus direction and tracking direction by the servo circuit 6. The servo circuit 6 controls the sled motor 3 and moves the pickup 4 in the tracking direction, thereby following all tracks of the disk 1 and moving to the target position. That is, the thread motor 3 is a motor for driving the pickup (optical head) in the radial direction.
[0018]
The signal reproduced by the pickup 4 is amplified by the RF amplifier circuit 5, and the digital signal processing circuit 7 performs error correction of the reproduced signal, detection of address information, reading of data, and the like. The servo circuit 6 controls the rotation of the disk 1 by driving the spindle motor 2.
[0019]
The CPU 10 reads and executes the control program recorded in the ROM 12. The CPU 10 can detect the timing when the disk 1 is inserted by the disk insertion detection circuit 9. Further, the CPU 10 controls the servo circuit 6 to perform reproduction, reads the address information recorded on the disk 1 from the digital signal processing circuit 7, and causes the pickup 4 to seek to the target position.
[0020]
Further, the CPU 10 which is “individual identification information detecting means” reads information recorded on the disk 1 from the digital signal processing circuit 7. Further, the CPU 10 performs automatic adjustment of the reproduction circuit such as offset cancellation and amplitude adjustment of the servo error signal and automatic adjustment of the recording circuit in order to optimize the reading performance when the disk 1 is inserted.
[0021]
Here, signals for automatic adjustment (automatic adjustment information) include the following.
(1) Offset adjustment of playback signal, servo signal RF signal offset adjustment, Focus Error signal offset adjustment, Tracking Error signal offset adjustment, Sled Error signal offset adjustment, Skew Error signal offset adjustment, Focus Bias adjustment (2) Playback signal, servo Amplitude adjustment of signal RF adjustment, Focus Servo Gain adjustment, Tracking Servo Gain adjustment, Sled Servo Gain adjustment, Sled Hall element output level adjustment, Skew adjustment Other than the above (1), (2) There is OPC (optimization adjustment of laser power for recording).
[0022]
Further, the CPU 10 stores information read from the disk 1, adjustment values for automatic adjustment, etc. in the RAM 11, which is “disk individual identification information storage means, automatic adjustment information storage means”, or a flash ROM (eg, flash EEPROM) 13 of nonvolatile memory. Read / write / erase information. Here, the data of the ROM 12 may be in the flash ROM 13, and the RAM 11, ROM 12, or flash ROM 13 may be built in the CPU 10. Further, the CPU 10 can measure the in-machine temperature by the in-machine temperature detection circuit 8 that detects the in-apparatus temperature (in-machine temperature) of the optical disc recording / reproducing apparatus HD.
[0023]
Next, the structure of information recorded on the disc 1 will be described.
The disk 1 is a writable / erasable optical disk, for example, and has the configuration shown in FIG. 2 (ECMA standard for DVD + RW). In FIG. 2, the radial position from the center of the disc is defined in order from the left, the head data address (head data PSN) of the recording information, the number of recording data (number of physical sectors), the contents of the recording data, and the classification of the recording data. .
[0024]
Among these items, “Inner Disc Information Zone” of “Lead-in classification” and “Outer Disc Information Zone” of “Lead-out classification” are involved in the present embodiment. The contents of these two pieces of information are the same. In these areas, 16 2048-byte sectors are combined to form one Disc control Block (hereinafter referred to as DCB), and 16 DCBs constitute an “Inner / Outer Disc Information Zone”.
[0025]
FIG. 3 shows the configuration of “DCB”. “Content Descriptor” indicating the contents of the DCB is written in the first 4 bytes. A DCB in which “46444300” (refer to FIG. 4, FDC + version number 00 in ASCII code) is written in “Content Descriptor” is the content of “Formatting DCB”.
[0026]
FIG. 4 shows the configuration of “Formatting DCB”. Among them, those related to the present invention are “Content Descriptor” of 0 to 3 bytes, “Drive ID” of 8 to 39 bytes, and “Disc ID” of 64 to 71 bytes.
As shown in FIG. 3, the “Drive ID” is composed of information corresponding to the manufacturing company of the device that records the “Formatting DCB”, the model name / type number of the recording device, and the serial number of the recording device.
“Disc ID” is 8-byte information recorded by automatically calculating a unique number for each disk when the recording device records “Formatting DCB”.
[0027]
The disk becomes usable by performing the format process. When the formatting process is performed, “Formatting DCB” is always recorded. Since “Drive ID” is a unique value in each recording device, it is possible to specify one recording device that records “Formatting DCB”. Also, the disk formatted by each recording device can be identified and identified by “Disc ID”. Therefore, by reading “Drive ID” and “Disc ID”, each disk can be individually identified.
[0028]
In this case, “Drive ID” and “Disc ID” of “Formatting DCB” are used as a method for identifying each disk. However, any other disk can be used as long as it can identify each disk. It may be a thing.
[0029]
Next, the operation of the optical disc recording / reproducing apparatus HD configured as described above will be described based on the flowcharts shown in FIGS. FIG. 5 shows the first half of the flowchart, and FIG. 6 shows the second half. FIG. 6 (steps 4 to 11, except step 10) shows the main part of the present invention.
The CPU 10 monitors the timing at which the disk 1 is inserted by the disk insertion detection circuit 9 and waits until it is inserted (step 1).
[0030]
When the disk 1 is inserted, the CPU 10 determines the type of the disk and switches to a recording / reproducing circuit corresponding to the disk 1 (step 2). Classify disc types as follows:
CD (including CD-R)
CD-RW
DVD / ROM (Single / Dual Layer)
DVD-R
DVD + RW
[0031]
Next, as shown in FIG. 5, the CPU 10 automatically adjusts the reproduction circuit for each disk (step 3). Next, as shown in FIG. 6, the CPU 10 determines whether or not the disc 1 identification information (consisting of “Drive ID” and “Disc ID”) is written (step 4). Here, when the disc 1 is other than DVD + RW, the identification information is not written. When the disk 1 is a DVD + RW, the CPU 10 reads the first 4 bytes of each DCB of “Inner / Outer Disc Information Zone” from the digital signal processing circuit 7 to determine whether it is 46444300 (that is, “Formatting DCB” exists). Check out. When the CPU 10 finishes checking the first 4 bytes in all DCBs, if there is no “Formatting DCB”, it is an unformatted disk, and the disk individual identification information is not written (it is written when formatting). Judge.
[0032]
If the disc individual identification information is not written, the CPU 10 can perform recording / reproduction of the disc information after performing the automatic adjustment processing of the recording circuit, which is a conventional processing (step 10). When the disc individual identification information is written, the CPU 10 compares all the “identification information of the display reproduced in the past” stored in the flash ROM 13 with the identification information of the disc 1 to determine whether the identification information is the same. Search (steps 5-7).
[0033]
When there is the same identification information, the CPU 10 reads the automatic adjustment information (adjustment value and in-machine temperature value) of the recording circuit corresponding to the identification information from the flash ROM 13, and the current in-machine temperature value obtained from the in-machine temperature detection circuit 8. After the adjustment value is corrected by the above, the adjustment circuit in the servo circuit 6 is set, and the history information (the number of insertions of the disk or the rearrangement of the order in which each disk is inserted) is updated (step 8). It is possible to record / reproduce disc information without processing.
[0034]
If there is no identical identification information, the CPU 10 performs an automatic adjustment process, which is a conventional process (step 9), and the identification information of the disk 1 and the automatic adjustment information of the recording circuit (adjustment value and in-machine temperature detection circuit 8) The obtained in-machine temperature value) and history information are recorded in the flash ROM 13 (step 11), and disc information can be recorded and reproduced.
[0035]
For reference, FIG. 7 shows information on each disk stored in the flash ROM 13. Information on each disk is composed of identification information (40 bytes), adjustment information (4 bytes), and history information (4 bytes). Of these, the number of times history information is inserted is updated each time a corresponding disc is inserted, and the order in which history information is inserted is reordered and updated every time a disc having identification information is inserted.
[0036]
Although the above embodiment relates to the disk recording / reproducing apparatus, the disk recording apparatus (single) or the disk reproducing apparatus (single) can also be configured as in this embodiment.
[0037]
【The invention's effect】
According to the disk reproducing apparatus of the first aspect, the process of automatically adjusting the reproducing circuit can be omitted for a disk that has been reproduced once. Therefore, the time until the disc information becomes reproducible after the disc is inserted is shortened, and an environment with good responsiveness can be provided to the user.
[0038]
According to the disk recording apparatus of the fourth aspect, the process of automatically adjusting the recording circuit can be omitted for a disk that has been recorded once. Therefore, the time until the disc information becomes recordable after the disc is inserted is shortened, and an environment with good responsiveness can be provided to the user.
[0039]
Further, according to the disk recording / reproducing apparatus of the eighth aspect, the process of automatically adjusting the recording circuit or the reproducing circuit can be omitted for the disk which has been recorded or reproduced once. Therefore, the time until the disc information becomes recordable or reproducible after the disc is inserted is shortened, and an environment with good responsiveness can be provided to the user.
[0040]
In the disk reproducing device according to claim 2, the disk recording device according to claim 5, or the disk recording / reproducing device according to claim 9, an inexpensive flash ROM (for example, EEPROM) is used as the disk individual identification information storage means and the automatic adjustment information storage means. Since they are provided, these means can be configured economically.
[0041]
The disc recording apparatus according to claim 6 or the disc recording / reproducing apparatus according to claim 10, wherein a large amount of disc individual identification information is accumulated, so that the unused area of the nonvolatile memory is reduced, and the disc individual identification information is newly added. Is stored, the history information is used to overwrite or erase the information on the disk that is not used frequently or the information on the disk that was used at the oldest time, or the number of insertions (number of use). Priority is given to overwriting or erasing the disk with few. For this reason, it is possible to shorten the time until recording and reproduction can be performed on a frequently used disk or a recently used disk. In addition, the use area of the nonvolatile memory can be reduced.
[0042]
The disc reproducing device according to claim 3, the disc recording device according to claim 7, or the disc recording / reproducing device according to claim 11 comprises in-machine temperature detecting means for detecting the temperature in the apparatus, and according to the detected value of the in-machine temperature means. Thus, the stored value of the automatic adjustment information storage means is corrected. In these devices, since the in-machine temperature adjustment value and the in-machine temperature value at the time of temperature adjustment are accumulated in the nonvolatile memory, even if the in-machine temperature changes after the disk is reinserted, the automatic adjustment information storage means The stored value can be corrected to the optimum value.
[Brief description of the drawings]
FIG. 1 is a block diagram of an embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a conventional DVD + RW standard.
FIG. 3 is a diagram showing a configuration of a conventional DVD + RW standard.
FIG. 4 is a diagram showing a configuration of a conventional DVD + RW standard.
FIG. 5 is a flowchart of the same embodiment, showing the first half thereof.
FIG. 6 is a flowchart of the same embodiment, showing the latter half.
FIG. 7 is a diagram showing information on each disk stored in the flash ROM in the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Disk, 2 ... Spindle motor, 3 ... Thread motor, 4 ... Pickup, 5 ... RF amplifier, 6 ... Servo circuit, 7 ... Digital signal processing circuit, 8 ... In-machine temperature detection circuit, 9 ... Disc insertion detection circuit, 10 ... CPU, 11 ... RAM, 12 ... ROM, 13 ... Flash ROM

Claims (7)

A disc individual identification information for identifying the disk of each of each disc used in the playback, the disc individual identification information storage means for storing the number of uses of the respective disks,
Automatic adjustment information storage means for storing automatic adjustment information corresponding to each disk for each disk used for reproduction;
Individual identification information detecting means for detecting disc individual identification information of the inserted disc ;
When the disc individual identification information for the inserted disc is stored in the disc individual identification information storage unit, the number of times the disk is used is updated, and the automatic adjustment information storage unit changes the disc individual identification information. If the disc individual identification information for the inserted disc is not stored in the disc individual identification information storage means, the information about the disc with a small number of uses is reproduced. , The disc individual identification information for identifying the inserted disc and the number of times of use of the inserted disc are stored in the disc individual identification information storage means, and the inserted information is stored in the automatic adjustment information storage means. The automatic adjustment information corresponding to the disc is stored, and based on the stored automatic adjustment information. And reproducing means for reproducing
A disc playback apparatus comprising: The disc reproducing apparatus includes an in-machine temperature detecting means for detecting a temperature in the apparatus, and the stored value of the automatic adjustment information storing means is corrected according to a detected value of the in-machine temperature means. The disk reproducing apparatus according to claim 1. A disc individual identification information for identifying the disk of each of each disc used for recording, the disc individual identification information storage means for storing the number of uses of the respective disks,
For each disk used for the recording, automatic adjustment information storage means for storing automatic adjustment information corresponding to each disk;
Individual identification information detecting means for detecting disc individual identification information of the inserted disc ;
When the disc individual identification information for the inserted disc is stored in the disc individual identification information storage unit, the number of times the disk is used is updated, and the automatic adjustment information storage unit changes the disc individual identification information. When recording is performed based on the corresponding automatic adjustment information, and the disc individual identification information for the inserted disc is not stored in the disc individual identification information storage means, information about the disc with a small number of uses , The disc individual identification information for identifying the inserted disc and the number of times of use of the inserted disc are stored in the disc individual identification information storage means, and the inserted information is stored in the automatic adjustment information storage means. The automatic adjustment information corresponding to the disc is stored, and based on the stored automatic adjustment information. A recording unit that performs recording
A disk recording apparatus comprising: The disk recording apparatus includes an in-machine temperature detecting means for detecting a temperature in the apparatus, and the stored value of the automatic adjustment information storing means is corrected according to a detected value of the in-machine temperature means. The disk recording apparatus according to claim 3 . And each disc individual identification information for identifying individual disks in each disk using a disk individual identification information storage means for storing the number of uses of the respective disks,
For each used disk, automatic adjustment information storage means for storing automatic adjustment information individually corresponding to each disk;
Individual identification information detecting means for detecting disc individual identification information of the inserted disc ;
When the disc individual identification information for the inserted disc is stored in the disc individual identification information storage unit, the number of times the disk is used is updated, and the automatic adjustment information storage unit changes the disc individual identification information. When recording or playback is performed based on the corresponding automatic adjustment information, and the disc individual identification information for the inserted disc is not stored in the disc individual identification information storage means, The disc individual identification information for identifying the inserted disc and the number of times of use of the inserted disc are stored in the disc individual identification information storage unit, and the automatic adjustment information storage unit stores the number of uses of the inserted disc. The automatic adjustment information corresponding to the inserted disc is stored, and the stored automatic adjustment information is stored. And a recording / reproducing means for recording or playback on the basis of the
Disk recording and reproducing apparatus characterized by comprising a. The disk recording / reproducing apparatus includes an in-machine temperature detecting means for detecting a temperature in the apparatus, and the stored value of the automatic adjustment information storing means is corrected in accordance with a detected value of the in-machine temperature means. The disk recording / reproducing apparatus according to claim 5 . And individual identification information for identifying the disk of each of each disc used in the playback, the disc individual identification information storing step of storing the number of uses of the respective disc into the first storage means,
An automatic adjustment information storage step for storing, in the second storage means, automatic adjustment information corresponding to each disk for each disk used for the reproduction;
An individual identification information detecting step for detecting disc individual identification information of the inserted disc ;
When the disc individual identification information for the inserted disc is stored in the first storage means, the number of times the disk is used is updated, and the disc identification information from the second storage means is handled. If the disc individual identification information for the inserted disc is not stored in the first storage means, priority is given to the information about the disc with a small number of uses. Then, the disc storage identification information for identifying the inserted disc and the number of times of use of the inserted disc are stored in the first storage means, and the number of uses of the inserted disc is stored in the second storage means. A reproduction step of storing corresponding automatic adjustment information and performing reproduction based on the stored automatic adjustment information;
A disc playback method comprising :

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