JP3967632B2 - Optical disk controller, optical disk control method, optical disk control apparatus, and optical disk apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an optical disk controller used for an optical disk apparatus that records information on an optical disk or reproduces information from an optical disk using a semiconductor laser (red laser, blue laser, etc.) as a light source. More specifically, the present invention discriminates the type of optical disc loaded in an apparatus capable of recording or reproducing a plurality of types of optical discs having different physical structures and logical structures, and the memory of the memory is determined according to the discriminated optical disc. Optical disk controller that performs allocation (mapping)And optical disc control method, optical disc control device, andThe present invention relates to an optical disk device.
[0002]
[Prior art]
In recent years, research and development on a digital versatile disc (hereinafter referred to as DVD) that can be recorded on a track of an optical disc by compressing not only audio information but also digitized image information and the like has been active. Such DVD-based optical disks include, for example, DVD-ROM, DVD-R, DVD-RAM, etc., which have different physical and logical structures.
[0003]
In an optical disc apparatus for recording information on an optical disc or reproducing information from an optical disc, a signal recording surface of a rotationally driven optical disc is irradiated with light such as laser light from an optical pickup (optical pickup), and then the optical pickup By detecting the return light from the signal recording surface of the optical disc by the light receiving element and reading the signal recorded on the optical disc, reproduction information such as image data is generated.
[0004]
Conventional optical discs (CD-ROM, CD-R, CD-RW, etc.) have the same physical structure even if the logical structure is different, so multiple types of optical disks are recorded by a common optical disk controller. Or it is possible to play. However, in the DVD system (DVD-ROM, DVD-R, DVD-RAM, etc.), the physical structure and the logical structure are different from each other, and in order to record or reproduce a plurality of types of optical disks on the same optical disk apparatus, the physical structure It is necessary to mount a dedicated optical disk controller for each of the above (CD system and DVD system), and to process parts with different logical structures by different programs (firmware and μ code).
[0005]
A central processing unit (hereinafter referred to as a CPU) that communicates with a host computer controls the optical disk controller when recording or reproducing information, and performs focus control, tracking control, and information according to a request from the host computer. Search for the target position for recording or playing back. In the conventional optical disk apparatus, a unique optical disk controller is used for each of a plurality of types of optical disks having different physical structures and logical structures, so that the type of the optical disk controller and the standard change (version upgrade, etc.) of each disk can be used. Accordingly, it is necessary to rewrite the CPU program or replace the CPU itself. Therefore, in such a conventional optical disk device, it is necessary to prepare resources necessary for each dedicated optical disk controller and the CPU corresponding thereto for each optical disk device corresponding to each optical disk.
[0006]
[Problems to be solved by the invention]
However, even if it is limited to optical discs having the same external dimensions of 12 cm in diameter, in addition to conventional CD systems (CD-ROM, CD-R, CD-RW, etc.), DVD systems (DVD-ROM, DVD-R, DVD) -RW, DVD-RAM, etc.) If different types of optical disks are to be played back or recorded with the same optical disk device, the software capacity and development man-hours of the CPU will increase, and the same CPU and the same Since many resources are required for the optical disk controller, it is difficult to put it to practical use with only limited resources. Further, in order to ensure compatibility between optical disks, additional resources have been added to increase costs.
[0007]
Further, in order to achieve playback compatibility or recording compatibility in an optical disk apparatus in which the CPU controls the entire system, it is necessary to develop software for the CPU in accordance with the type of the optical disk. Therefore, the optical disk apparatus becomes a complicated processing system and the possibility of occurrence of bugs increases. In addition, since it is common that the man-hours of software increase even if the entire configuration is reexamined and reconstructed from the beginning, the possibility of occurrence of bugs increases as a result.
[0008]
As described above, if an attempt is made to increase the number of optical disks supported in the optical disk apparatus by the conventional method, it affects not only a new optical disk but also a conventional optical disk recording or reproduction process that has been supported, resulting in the reliability of the apparatus. The possibility of decline was high.
[0009]
The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to control all types of optical disks with the same CPU or optical disk controller with limited resources. It is another object of the present invention to provide a high performance and highly reliable optical disc apparatus.
[0010]
[Means for Solving the Problems]
  The present inventionAt least the standard type is a read-only disc, a recordable disc, a rewritable disc,An optical disk controller for controlling recording or reproduction of an optical disk, wherein the rewritable memory stores information necessary for recording or reproduction of the optical disk;From disc discrimination data based on playback signalOptical discStandard ofType ofOrA discriminating means for discriminating the type;Memory control means for arranging the memory according to the determination result by the determination means;Based on a determination result by the determination unit, a search unit that searches for an area in which the control information of the optical disc is recorded; a reproduction unit that reproduces the control information recorded in the area searched by the search unit;The memory control means refers to the control information reproduced by the reproduction means and arranges the memory.An optical disk controller, which achieves the above object.
[0011]
  One embodiment of the present invention is:The discriminating result and the disc discriminating data are the optical disc controllers described above, wherein the discriminating result and the disc discriminating data are stored in a fixed position of the memory.
[0012]
  One embodiment of the present invention is:In the optical disk controller according to the above, the area for storing the information necessary for the reproduction in the memory is arranged in a larger order in the order of a recordable disk, a reproduction-only disk, and a rewritable disk.
[0013]
  One embodiment of the present invention is:In the case of a read-only disc, the optical disc controller described above is characterized in that an area for storing information relating to copyright management is arranged.
[0014]
  One embodiment of the present invention is:In the case of a rewritable disc, the optical disc controller described above is characterized in that an area for storing information relating to defect management is arranged.
[0015]
  One embodiment of the present invention is:In the case of a recordable disk, an area for storing information relating to linking is arranged.
[0016]
  One embodiment of the present invention is:The optical disc controller as described above, wherein the disc discrimination data is any one or a combination of a tracking error signal, a focus error signal, a light amount signal, and an RF signal.
[0017]
  One embodiment of the present invention is:The optical disk controller according to the above, wherein the reproduction unit outputs the control information reproduced by the reproduction unit to the memory based on the determination result.
[0018]
  One embodiment of the present invention is:Reproduction information type discriminating means for discriminating the type of reproduction information recorded on the optical disc is further provided. When the reproduction information type is video data, the reproduction control information necessary for reproduction is stored in the memory. The optical disk controller as described above, which controls the reproducing means.
[0019]
  One embodiment of the present invention is:The reproduction control information is the optical disk controller described above, which is control information such as navigation information, captions, and audio.
[0020]
  One embodiment of the present invention is:An optical disc control method for controlling recording or reproduction of an optical disc, wherein at least the type of the standard is a read-only disc, a recordable disc, or a rewritable disc, and is rewritable for storing information necessary for recording or reproduction of the optical disc. An optical disc control method using a memory, a memory storing step for storing information necessary for recording or reproduction of the optical disc in a rewritable memory, a discriminating step for discriminating the type or type of the standard of the optical disc, A memory control step for arranging the memory according to a result of the determination step, a search step for searching for an area in which the control information of the optical disc is recorded based on a determination result by the determination unit, and a search by the search unit The control information recorded in the recorded area is reproduced. Includes a regeneration step that, the, the memory control step performs the arrangement of the memory by referring to the control information reproduced by said reproduction step, an optical disc control method.
[0021]
  One embodiment of the present invention is:At least the standard type is a read-only disc, a recordable disc, or a rewritable disc. An optical disc control device that controls recording or playback of an optical disc, and is rewritable to store information necessary for recording or playback of the optical disc. An optical disk control device comprising a memory, a memory storage means for storing information necessary for recording or reproduction of the optical disk in a rewritable memory, a determination means for determining the type or type of the standard of the optical disk, A memory control unit that arranges the memory according to a determination result by the determination unit; a search unit that searches for an area in which the control information of the optical disc is recorded based on the determination result by the determination unit; and A player who reproduces the control information recorded in the searched area. When, wherein the said memory control means performs the arrangement of the memory by referring to the control information reproduced by said reproducing means, an optical disk control device.
[0022]
  One embodiment of the present invention is:At least the type of standard is a read-only disc, a recordable disc, a rewritable disc, an optical pickup that emits a light beam to the optical disc and detects reflected light from the optical disc as a signal, and the signal from the optical pickup A signal processing circuit for performing predetermined processing, a servo circuit for moving the optical pickup, a signal processed from the signal processing circuit, and controlling the servo circuit; Is an optical disc apparatus.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0025]
(Embodiment 1)
FIG. 1 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to Embodiment 1 of the present invention.
[0026]
The optical disc apparatus 1 can be connected to a host controller 22 including a reproduction information output unit (output means) 23 that outputs sound, data, images, and the like. In addition, the optical disc apparatus 1 includes an optical disc controller 6. The optical disk controller 6 includes a rewritable (variable) memory 25 for storing information necessary for recording or reproduction of the optical disk 2, an optical disk determination block (determination means) 7 for determining the type and type of the optical disk, and an optical disk determination block. 7 is an information search block (search means) 8 for searching an area where control information of the optical disc is recorded, and information reproduction for reproducing the control information recorded in the area searched by the information search block 8 Based on at least one of the block (reproducing means) 9, the discrimination result by the optical disc discriminating block 7 and the control information reproduced by the information reproducing block 9, the CPU 21 and the arrangement control block 24 (for changing the memory arrangement) And memory control means). Here, the CPU 21 and the arrangement control block 24 are collectively used as the memory control unit. However, the CPU 21 may include the function of the arrangement control block 24 as a memory control unit, or the arrangement control block 24 alone may be a memory control unit. It is good.
[0027]
The optical disc apparatus 1 can reproduce a plurality of types of optical discs having different physical and logical structures, such as DVD-ROM, DVD-R, and DVD-RAM. An optical pickup 3 equipped with a light source such as a semiconductor laser irradiates a signal recording surface of an optical disk 2 that is rotationally driven by a drive mechanism (spindle motor or the like) (not shown) to irradiate a light beam and reflect light from the optical disk 2 Is received by a photodetector (not shown) and detected as an electrical signal. The detection signal from the optical pickup 3 is amplified to a predetermined amplitude by the AMP 4.
[0028]
A signal from the AMP 4 is input to the signal processing circuit 5, the RF signal is output by an addition circuit (not shown) that takes the total reflected light amount built in the signal processing circuit 5, and a focus error is generated by a differential circuit (not shown). Servo signals such as tracking errors are generated. Further, the RF signal which is the sum signal is further input to the information reproducing block 9 in the optical disk controller 6 through an equalizing circuit that emphasizes only the RF signal band. The servo signal which is a difference signal is subjected to phase compensation and gain compensation by the servo circuit 39, and then amplified in current and output to an actuator built in the optical pickup 3. As a result, the optical pickup 3 is driven in a direction perpendicular to the information surface of the optical disc 2 (focus direction) and in a direction crossing the spiral track on the information surface (tracking direction), so that the light beam on the optical disc 2 correctly tracks the track. Controlled to scan.
[0029]
The RF signal input from the signal processing circuit 5 to the optical disk controller 6 is first binarized at a predetermined slice level by the binarization circuit in the information reproduction block 9 and is clock-synchronized by the PLL circuit. The synchronized data is further extracted by a predetermined detection window generated from the clock. The extracted data is arranged two-dimensionally or three-dimensionally as a data series, and error correction is executed based on a predetermined generator polynomial. The error-corrected data is stored in the variable memory 25 for each block, and is output toward the reproduction information output unit 23 in the host controller 22 via the I / F circuit 18 at a predetermined timing.
[0030]
Next, a control and arrangement method of the variable memory 25 corresponding to the storage means that is a main part in the first embodiment will be described.
[0031]
The servo circuit 39 measures the amplitude of the tracking error signal (TE), the focus error signal (FE), the light amount signal (AS), and the RF signal (RF) generated and processed by the signal processing circuit 5, and the measured signal or A combination signal of a plurality of measurement signals (comparison, addition / subtraction / multiplication / division calculation, etc.) is output to the optical disc discrimination block 7 in the optical disc controller 6 as disc discrimination data.
[0032]
The optical disc discrimination block 7 can discriminate the type and type of the loaded optical disc 2 by comparing a predetermined level set in advance with the inputted discrimination data. Here, the type is information relating to the type of an optical disc having a different physical structure, such as a DVD-ROM, DVD-R, DVD-RW, or DVD-RAM. The type is information on the capacity of an optical disc such as DVD-RAM 2.6G and DVD-RAM 4.7G defined by a so-called book type, and information on the physical size of an optical disc such as an 8 cm disc and a 12 cm disc. .
[0033]
The discrimination result by the optical disc discrimination block 7 is transmitted to the CPU 21, and the CPU 21 determines the optimum memory arrangement for the loaded optical disc 2 according to the discrimination result of the optical disc discrimination block 7. The determined memory arrangement is output as a command signal to the arrangement control block 24, and the optimum arrangement of the actual variable memory 25 is performed. As described above, when the optical disk controller 6 according to Embodiment 1 of the present invention is used, even if an optical disk 2 of a different type or type is loaded in the optical disk apparatus 1, it can be reproduced stably and at high speed.
[0034]
Further, when the host controller 22 issues a command for reading the control information of the control track located on the innermost periphery of the disk, for example, via the user I / F block 30, the information is transmitted via the I / F circuit 18 and the CPU 21. A search command and its additional data are transmitted to the search block 8 to check the state of the current light beam spot, and so that the light beam spot moves from the position of the track currently being scanned to the position of the desired control track. A start command and movement data (the number of retrievals, etc.) are output to the servo circuit 39. The servo circuit 39 performs necessary processing in accordance with the input start command and movement data. That is, for example, a drive signal of a traverse (not shown) that moves the optical pickup 3 in the radial direction of the disk 2 is generated, and a desired control track is searched.
[0035]
After the search is completed, the control information of the control track is input to the variable memory 25 via the optical pickup 3, the AMP 4, the signal processing circuit 5, and the information reproduction block 9. The input information is stored in a control information storage unit arranged at a predetermined position on the variable memory 25. Even if the CPU 21 refers to the stored control information and outputs a memory placement command to the placement control block 24, the optimal placement of the variable memory 25 can be performed. As described above, when the optical disk controller 6 according to Embodiment 1 of the present invention is used, even if an optical disk 2 of a different type or type is loaded in the optical disk apparatus 1, it can be reproduced stably and at high speed. The control information includes information such as defect management information in DVD-RAM and linking information in DVD-R / RW.
[0036]
Further, it is particularly preferable that the control information of the control data stored on the variable memory 25 is stored at a fixed position. Further, when disc type or type is discriminated using data such as FE and AS in the signal processing circuit 5, it is preferable to store the discriminating result and inputted measurement data in the fixed position. In this way, even when the disk is replaced with another disk, the type and type of the replaced disk can be accurately determined by comparing the newly obtained determination data with the stored data. The first embodiment is not limited in any way by the disc discrimination method and configuration.
[0037]
Next, the arrangement process of the variable memory 25 in the optical disc apparatus 1 using the optical disc controller 6 according to the first embodiment will be described by taking the case where the type of the optical disc 2 to be reproduced is DVD-ROM, DVD-RAM, DVD-R as an example. This will be described in more detail.
[0038]
FIG. 2 shows an example of arrangement information (map) arranged in the variable memory 25 in accordance with the discrimination result or control information of the optical disc discrimination block 7. In the first embodiment, the capacity of the variable memory 25 is set to 256 Kbytes for the sake of easy understanding.
[0039]
For example, if the determination result is a DVD-RAM, it is necessary to store defect management information, and therefore a defect management information storage area of 62 Kbytes is secured. The reproduction information storage area is set to 160 Kbytes because the DVD-RAM has a sector structure and good accessibility. The capacity required for the other areas is 2 Kbytes for one layer of the control information storage area other than the defect management information, and 32 Kbytes for the other information storage area. Depending on the capacity of the defect management information, for example, when the number of defect information is small, the defect management information storage area can be reduced and the reduced area can be assigned to another area.
[0040]
In the case of a DVD-ROM, defect management is not necessary and higher speed processing such as information retrieval, copying to a hard disk, and installation is required. Increase and set to 192 Kbytes. The control information storage area needs to be 4 Kbytes, which is twice that of a DVD-RAM, because a dual-layer disc exists. The remaining portion is set to 60 Kbytes as the other information storage area, and is arranged so that copyright management and area code management peculiar to ROM can be realized.
[0041]
Further, in the case of a DVD-R, the DVD-R basically has a format structure on the premise of incremental recording and has poor random accessibility. Therefore, it is preferable to increase the reproduction information storage area as much as possible. In FIG. 2, the reproduction information storage area is set to 224 Kbytes. Further, the control information storage area only needs to secure one layer of control information 2 Kbytes. Then, 30 Kbytes are arranged as the remaining other information storage area. Further, when there is linking information that is control information other than the control information, a control information area is further secured according to the size.
[0042]
As described above, when the first embodiment is used, it is possible to automatically perform the optimal arrangement of the memory according to the type and type of the optical disc or the control information, and to limit the capacity of the limited memory to the type of the optical disc. It can be effectively used according to the type or control information.
[0043]
Further, as shown in FIG. 26, by allowing an external RAM 16 to be connected to the optical disk controller 6 of the present invention, a large-capacity, high transfer rate optical disk (for example, High Definition DVD = HD-DVD) that will be practically used in the future. The memory capacity can be effectively utilized even when handling larger information such as high resolution image information of digital hi-vision at high speed. For example, the current DVD has an average transfer rate of about 5 Mbps necessary for reproducing image information, whereas the HD-DVD has an average of about 32 Mbps. For this reason, in order to continue reproducing the image information without interruption, about six times the memory capacity is required, and the built-in memory alone is insufficient. In such a case, it is effective to connect an external RAM 16. At this time, the total memory capacity including the external RAM 16 is set based on the time from when the tracking control and the focus control are lost and the spin-up is performed again to read the desired data and the buffering is resumed. By doing so, it is possible to continue reproducing the image information without interruption. For example, if the re-spin up time is 10 seconds and the transfer rate is 32 Mbps,
32Mbit × 10sec / 8bit = 40MB
Therefore, a configuration may be adopted in which a memory of 40 MB or more, for example, a general-purpose 64 MB is mounted.
[0044]
As described above, it is very effective to connect the external RAM 16 to the disk controller 6 of the present invention.
[0045]
(Embodiment 2)
FIG. 3 shows a configuration of the optical disc apparatus 1 according to the second embodiment. In FIG. 3, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
[0046]
A configuration of the reproduction information type determination block 100, which is a main part in the second embodiment, will be described.
[0047]
In the second embodiment, the optical disk controller 6 further includes a reproduction information type determination block (reproduction information type determination means) 100 for determining the type of control information necessary for reproduction. Based on the determination result of the reproduction information type determination block 100, the CPU 21 and the arrangement control block 24 (memory control means) store control information necessary for reproduction in the memory when the reproduction speed of the optical disc 2 is lower than a predetermined speed. Thus, the information reproducing block (reproducing means) 9 is configured to be controlled.
[0048]
When the host controller 22 issues a command to read control information of a control track located on the innermost periphery of the disk, for example, via the user I / F block 30, an information search block is transmitted via the I / F circuit 18 and the CPU 21. A search command and its additional data are transmitted to 8. Next, a seek command and movement data (such as the number of movements) are output to the servo circuit 39 so that the light beam spot moves from the position of the track currently being scanned to the position of the desired control track. The servo circuit 39 executes necessary processing in accordance with the start command and movement data input from the information search block 8. That is, for example, a drive signal of a traverse (not shown) that moves the optical pickup 3 in the radial direction of the disk 2 is generated, and a desired control track is searched.
[0049]
After the search is completed, the control information of the control track is input to the variable memory 25 via the optical pickup 3, the AMP 4, the signal processing circuit 5, and the information reproduction block 9. The input information is stored in a control information storage unit arranged at a predetermined position on the variable memory 25. Of the control information stored in the control information storage unit, the type information of information recorded on the optical disc 2 is output to the reproduction information type determination block 100. The reproduction information type determination block 100 determines the type of information on the optical disc 2 from the input type information. The type here refers to the type of information related to the type of reproduction information stored on the optical disk, such as continuous VIDEO data, AUDIO data, or random ROM data. At the same time, the transfer rate of information can be determined by this type information.
[0050]
The determination result by the reproduction information type determination block 100 is transmitted to the CPU 21, and the CPU 21 determines the optimum memory arrangement for the transfer speed necessary for the information of the loaded optical disk 2 according to the determination result. The determined memory arrangement is output as a command signal to the arrangement control block 24, and the optimum arrangement of the actual variable memory 25 is performed. Therefore, even if an optical disk on which information with different transfer rates is recorded is loaded, it can be reproduced stably and at high speed. Control information such as control data stored separately from the reproduction information stored as a buffer on the variable memory 25 is preferably stored at a fixed position that is not rearranged in the variable memory.
[0051]
Further, not only the discrimination result of the reproduction information type discrimination block 100 but also the discrimination result of the optical disc discrimination block 7 may be used to determine the optimal memory arrangement for the loaded optical disc 2.
[0052]
As one example, the processing operation for memory allocation when the loaded optical disk is a VIDEO data disk and a ROM data disk will be described in more detail.
[0053]
FIG. 4 shows an example of arrangement information (map) arranged in the variable memory 25 in accordance with the determination result of the reproduction information type determination block 100. In the second embodiment, the capacity of the variable memory 25 is set to 256 Kbytes for easy understanding.
[0054]
For example, if it is determined that the type of reproduction information recorded on the optical disc 2 is sufficient VIDEO data even at a low transfer rate, the buffer page (reproduction information storage area) used when reading reproduction information continuously is two pages. (64 Kbytes) is sufficient. This is because the transfer rate read from the disk is ensured at least twice the host transfer rate. Demodulation, ECC, etc. are performed on the buffer page, and then output to the host. Even if the data is taken in after the buffer is empty, the timing is sufficient, but 2 pages (64 Kbytes) are secured in consideration of error retry or the like. As a result, a storage area for other control information can be secured at 192 Kbytes, and control information such as navigation information, subtitles, and audio can be stored in advance, which is very effective for video playback.
However, if it is determined that the type of reproduction information recorded on the optical disc 2 is information that requires high-speed reproduction such as ROM data, a buffer page (reproduction information storage area) used at the time of sequential read of reproduction information. ) Requires at least 3 pages (96 Kbytes). This is because there is no difference between the time required for demodulation and ECC and the transfer time. If the three processes of demodulation, ECC, and transfer are performed independently, it is possible to prevent the transfer rate from being reduced due to the demodulation and ECC processes. Further, since there is little effective control information in the ROM data, 160 Kbytes is sufficient for the other control information storage area, and the arrangement control block 24 secures the basin.
[0055]
As described above, when the second embodiment is used, it is possible to automatically perform the optimum memory arrangement according to the type of reproduction information stored in the optical disc among the control information, and the limited memory Can be effectively utilized according to the type of reproduction information stored in the optical disc.
[0056]
Next, a variable memory in the optical disc apparatus 1 according to the second embodiment will be described by taking as an example a case where the disc is a rewritable optical disc and the type of playback information is determined to be sufficient playback information at a low transfer rate such as VIDEO data. 25 arrangement processing will be described in more detail.
[0057]
FIG. 5 shows arrangement information (map) arranged in the variable memory 25 when the reproduction information type determination block 100 determines that the reproduction information type is sufficient reproduction information even at a low transfer rate such as VIDEO data. An example is shown. For easy understanding, the capacity of the variable memory 25 is 256 Kbytes in total. In addition, the conventional mapping and the mapping according to the second embodiment are compared by taking, as an example, defect management information necessary for DVD-RAM playback.
[0058]
In the case of DVD-RAM, the defect management areas are at the innermost and outermost circumferences of the disc. Conventionally, when reproducing defect management information, reproduction is started after all defect management information is acquired. In the present invention, for example, when the type of reproduction information is VIDEO data that is reproduction information sufficient for low-speed reproduction, and a plurality of contents and programs are recorded, the selected contents are on the inner periphery. The processing is switched between the case of being on the outer periphery and the case of being on the outer periphery.
For example, when the type of the optical disc 2 is DVD-RAM, acquisition of defect management information (62 Kbytes) required at the time of reproduction is acquired, and only internal defect management information (for example, 30 Kbytes) is acquired at the inner periphery sequential read. In the peripheral sequential read, only defect management information necessary only at the outer periphery (for example, 30 Kbytes) is acquired, and specified content is reproduced based on the defect management information.
[0059]
If there is sufficient time to perform read-ahead read processing of reproduction information, only defect management information (for example, 30 Kbytes) necessary only on the inner circumference is acquired first, and the inner circumference is read as sequential reading is performed toward the outer circumference. In addition to the defect management information used in the above, it sequentially acquires and overwrites the necessary defect management information for the middle and outer circumferences.
[0060]
As a result, as shown in FIG. 5, the reproduction information storage area can be secured at 96 Kbytes, and the performance of the apparatus can be improved.
[0061]
Even in the case of the linking information required at the time of reproduction when the type of reproduction information is DVD-R / RW, it can be applied similarly to the defect management information in the case of the DVD-RAM. That is, at the inner periphery sequential read, only the linking information required only for the inner periphery is acquired, and as the sequential read is performed to the outer periphery, the necessary linking information is sequentially added to the linking information used on the inner periphery. Acquire and overwrite. Furthermore, in the case of DVD-R / RW, the border information necessary for multi-border playback is first acquired as a single border, the next border information necessary next is sequentially acquired while the first border is sequentially read, It may be configured to overwrite already used border information.
[0062]
As described above, by using the second embodiment, it is possible to acquire control information such as defect management information, linking information, or border information, which has been acquired at the time of startup, during playback of playback information. Thus, the activation time can be shortened.
[0063]
Further, if the second embodiment is used, the storage area for defect management information, linking information or border information can be reduced, and the reduced amount can be allocated to the buffer memory (reproduction information storage area), so that the read-ahead read process is further increased. Because it becomes possible, the effect is very great.
[0064]
(Embodiment 3)
FIG. 6 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to Embodiment 3 of the present invention. In FIG. 6, except the error rate or error correction count measurement block 200 is the same as that of the first embodiment, and detailed description thereof is omitted.
[0065]
The error rate or error correction count measurement block 200, which is a main part in the third embodiment, will be described.
[0066]
In the third embodiment, the optical disk controller 6 further includes an error rate or error correction count measurement block (error measurement means) 200 for measuring an error rate or error correction count when the control information is reproduced. The CPU 21 and the arrangement control block 24 (memory control means) allocate a part of the memory to the ring buffer set based on the measurement result of the error rate or error correction count measurement block.
[0067]
When the host controller issues a command to read reproduction information stored at an arbitrary position on the disc, for example, via the user I / F block 30, the information search block 8 via the I / F circuit 18 and the CPU 21. A search command and its additional data are transmitted to the servo circuit 39 so as to check the current light beam spot state and to move the light beam spot from the currently scanned track position to the desired control track position. The startup command and movement data (number of searches, etc.) are output. The servo circuit 39 performs necessary processing in accordance with the input start command and movement data. That is, for example, a drive signal for a traverse (not shown) that moves the optical pickup 3 in the radial direction of the disk 2 is generated, and a desired position is searched.
[0068]
After the search is completed, the reproduction information is input to the optical disk controller 6 via the optical pickup 3, the AMP 4, and the signal processing circuit 5. The reproduction information input to the optical disk controller 6 is first binarized at a predetermined slice level by the binarization circuit in the information reproduction block 9, and is clock-synchronized by the PLL circuit. The synchronized data is further extracted by a predetermined detection window generated from the clock. The extracted data is arranged two-dimensionally or three-dimensionally as a data series, and error correction is executed based on a predetermined generator polynomial. The error-corrected data is stored in the variable memory 25 for each block, and is output toward the reproduction information output unit 23 in the host controller 22 via the I / F circuit 18 at a predetermined timing.
[0069]
Further, information regarding error correction obtained in the information reproduction block 9 is input to an error rate or error correction count measurement block (error measurement means) 200 for measuring the error rate or error correction count of the reproduction information.
[0070]
The measurement result by the error rate or error correction count measurement block 200 is transmitted to the CPU 21, and the CPU 21 determines the optimal memory arrangement of the loaded optical disk 2 according to the measurement result of the error rate or error correction count measurement block 200. To do. The determined memory arrangement is output as a command signal to the arrangement control block 24, and the optimum arrangement of the actual variable memory 25 is performed.
[0071]
Next, when a part of the variable memory 25 is used as a ring buffer, and the size of the ring buffer is variable according to the error rate or the number of error corrections of the reproduction information acquired from the optical disc 2 via the information reproduction block 9 The arrangement process of the variable memory 25 in the optical disc apparatus 1 according to the third embodiment will be described in more detail.
[0072]
In FIG. 7, a part of the variable memory 25 is used as a ring buffer, and the size of the ring buffer is variable according to the error rate or the number of error corrections of the reproduction information acquired from the optical disc 2 through the information reproduction block 9. An example of arrangement information (map) arranged in the variable memory 25 is shown. For easy understanding, the capacity of the variable memory 25 is 256 Kbytes in total.
[0073]
For example, the size (number of pages) of a parity area used for error correction of buffered reproduction information in the ring buffer is switched according to the error rate or the number of error corrections of the buffered reproduction information.
[0074]
For example, when the optical disk controller 6 is used for realizing high-speed reproduction, the error rate for one ECC block (32 Kbytes per page) of buffering data (reproduction information) is one, and the error rate can be corrected with one correction. Is less than 0.5%, and one page of the required parity area is 32 Kbytes, the number of error corrections for buffering data (reproduction information) of one ECC block is one, or the error rate is less than 0.5% In some cases, a parity area (reproduction information storage area) of 3 pages (96 Kbytes) required at the minimum for high-speed reproduction is secured.
[0075]
Further, when the number of error corrections for buffering data (reproduction information) is 2 times or more, or when the error rate is 0.5% or more, the parity area is increased by 1 page and a parity area (128 Kbytes) for 4 pages. ).
[0076]
As described above, if the third embodiment is used, a parity area overflow at the time of sequential read can be avoided even for an optical disk with poor readability such as a damaged disk, thereby preventing a drop in transfer rate. it can.
[0077]
In addition, when only one error correction is required, the decrease in the number of pages in the parity area can be used as a reproduction information (buffering data) storage area. In this case, since the number of pages that can be read and read can be increased, the memory can be used effectively.
[0078]
(Embodiment 4)
FIG. 8 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to Embodiment 4 of the present invention. In FIG. 8, the same parts as those in the first embodiment shown in FIG. Note that in Embodiment 4, a port is a general-purpose terminal that functions as an input terminal or an output terminal. 8 has the same function as the variable memory 25 in the first embodiment, but is not limited to being variable.
[0079]
A port control method of the multiport circuit that is important in the fourth embodiment will be described.
[0080]
For example, in order to obtain control information of the control track located at the innermost circumference of the disk, the current light beam spot state is checked, or the position of the track currently scanned by the light beam spot is changed to the desired control track position. A start command and movement data (the number of searches, etc.) are output to the servo circuit 39 so as to move. The servo circuit 39 performs necessary processing in accordance with the input start command and movement data. That is, for example, a drive signal of a traverse (not shown) that moves the optical pickup 3 in the radial direction of the disk 2 is generated, and a desired control track is searched.
[0081]
After the search is completed, the control information of the control track is input to the buffer memory 40 via the optical pickup 3, the AMP 4, the signal processing circuit 5, and the information reproduction block 9. The input information is stored in a control information storage unit at a predetermined position in the buffer memory 40. Of the control information stored in the control information storage unit, the type information of the reproduction information stored in the optical disc 2 is output to the reproduction information type determination block 100. The reproduction information type determination block 100 determines the type of reproduction information stored on the optical disc 2 from the input type information. Here, the type information is information relating to the type of reproduction information stored in the optical disc such as VIDEO data, AUDIO data, or ROM data.
[0082]
The determination result by the reproduction information type determination block 100 is transmitted to the CPU 21, and the CPU 21 sets the optimum port according to the determination result (that is, information for setting a signal to be transmitted to the general-purpose terminal according to the determination result). To decide. The determined port setting is output as a command signal to the port control block 26, and the multi-port circuit 27 is optimally set. In this way, the loaded optical disk 2 can be reproduced stably and at high speed.
[0083]
Next, when the type of reproduction information stored in the optical disc 2 is VIDEO data or ROM data, the port setting of the multiport circuit 27 in the optical disc apparatus 1 according to the fourth embodiment will be described in more detail.
[0084]
FIG. 9 shows a port setting example of the multiport circuit 27 set according to the determination result of the reproduction information type determination block 100.
[0085]
When it is determined that the type of reproduction information stored in the optical disc 2 is sufficient for low-speed reproduction such as VIDEO data, a terminal for outputting reproduction information to the host controller 22 is provided in the I / F circuit 18. For example, switching to an MPEG I / F for image reproduction.
[0086]
When it is determined that the type of reproduction information stored on the optical disc 2 is reproduction information that requires high-speed reproduction such as ROM data, a terminal for outputting reproduction information to the host controller 22 is connected to the I / O. For example, switching to the ATA / ATAPI I / F for data transmission / reception in the F circuit 18 is performed.
[0087]
Thus, for example, a partial ROM in which the inner circumference of the disk is a ROM data storage area and the outer circumference is a VIDEO data storage area, or the first layer is a VIDEO data storage area and the second layer is a ROM data storage area. In the case of the configuration, the control track information corresponding to each area, or its boundary address, etc. can be obtained at high speed, so it is possible to smoothly switch between areas in the playback state and improve access performance. Can be made.
[0088]
As described above, when the fourth embodiment is used, it is possible to automatically switch the general-purpose terminal according to the type of reproduction information stored on the optical disc, and the reproduction information stored on the optical disc. Necessary signals can be transmitted effectively according to the type of the. Furthermore, a low-cost and high-function optical disk controller with a small number of terminals can be realized.
[0089]
(Embodiment 5)
FIG. 10 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to Embodiment 5 of the present invention. 10, parts that are the same as in the first embodiment shown in FIG. 1 are given the same reference numerals, and detailed descriptions thereof are omitted.
[0090]
The memory 300 and the memory 400 which are main parts in the fifth embodiment will be described.
[0091]
In the fifth embodiment, the memory includes a first memory (memory 300) and a second memory (memory 400). Here, the access speed of the first memory is higher than the access speed of the second memory. Further, the CPU 21 and the arrangement control block 24 (memory control means) allocate the first memory to the control information storage area and the second memory to the ring buffer.
[0092]
The servo circuit 39 measures the amplitude of the tracking error signal (TE), the focus error signal (FE), the light amount signal (AS), and the RF signal (RF) generated and processed by the signal processing circuit 5, and the measured signals Alternatively, a combination signal of a plurality of measurement signals (comparison, addition / subtraction / multiplication / division calculation, etc.) is output to the optical disc discrimination block 7 in the optical disc controller 6 as disc discrimination data.
[0093]
The optical disc discrimination block 7 can discriminate the type and type of the loaded optical disc 2 by comparing a predetermined level set in advance with the inputted discrimination data. Here, the type is information relating to the type of an optical disc having a different physical structure, such as a DVD-ROM, DVD-R, DVD-RW, or DVD-RAM. The type is information on the capacity of an optical disc such as DVD-RAM 2.6G and DVD-RAM 4.7G defined by a so-called book type, and information on the physical size of an optical disc such as an 8 cm disc and a 12 cm disc. .
[0094]
The discrimination result by the optical disc discrimination block 7 is transmitted to the CPU 21, and the CPU 21 determines the optimum memory arrangement for the loaded optical disc 2 according to the discrimination result of the optical disc discrimination block 7. The determined memory placement is output as a command signal to the placement control block 24, and optimum placement in the actual memory 300 and memory 400 is performed. As described above, when the optical disk controller 6 according to the fifth embodiment of the present invention is used, even if an optical disk 2 of a different type or type is loaded in the optical disk apparatus 1, it can be reproduced stably and at high speed.
[0095]
Further, when the host controller 22 issues a command for reading the control information of the control track located on the innermost periphery of the disk, for example, via the user I / F block 30, the information is transmitted via the I / F circuit 18 and the CPU 21. A search command and its additional data are transmitted to the search block 8 to check the state of the current light beam spot, and so that the light beam spot moves from the position of the track currently being scanned to the position of the desired control track. A start command and movement data (the number of retrievals, etc.) are output to the servo circuit 39. The servo circuit 39 performs necessary processing in accordance with the input start command and movement data. That is, for example, a drive signal of a traverse (not shown) that moves the optical pickup 3 in the radial direction of the disk 2 is generated, and a desired control track is searched.
[0096]
After the search is completed, the control information of the control track is input to the memory 300 via the optical pickup 3, the AMP 4, the signal processing circuit 5, and the information reproduction block 9. In FIG. 10, the control information is input to the memory 300, but may be input to the memory 400. The input information is stored in a control information storage unit arranged at a predetermined position on the memory 300. Even if the CPU 21 refers to the stored control information and outputs a memory placement command to the placement control block 24, the memory 21 and the memory 400 can be optimally placed. As described above, when the optical disk controller 6 according to the fifth embodiment of the present invention is used, even if an optical disk 2 of a different type or type is loaded in the optical disk apparatus 1, it can be reproduced stably and at high speed. The control information includes information such as defect management information in DVD-RAM and linking information in DVD-R / RW.
[0097]
Next, the arrangement of the memory 300 or the memory 400 in the optical disk apparatus 1 using the optical disk controller 6 according to the fifth embodiment will be described by taking as an example the case where the type of the optical disk 2 to be reproduced is DVD-ROM, DVD-RAM, DVD-R. The process will be described in more detail.
[0098]
FIG. 11 shows an example of arrangement information (map) arranged in the memory 300 and the memory 400 according to the discrimination result or control information of the optical disc discrimination block 7. In the fifth embodiment, the capacity of the memory 300 and the memory 400 is 256 Kbytes in total for easy understanding. The relationship between access speeds is such that memory 300> memory 400.
[0099]
For example, when the determination result is DVD-RAM, the buffer memory (reproduction information storage area) that is required for high-speed reproduction by sequential read and that requires high-speed access is 224 Kbytes, the page pointer management variable of the buffer memory and the disk The outermost peripheral address information or the like (page pointer management variable storage area) is secured at 32 Kbytes. These areas are arranged in the faster access memory 300. In addition, seek processing always occurs like random access read, and defect management information (defect management information storage area) used in a situation where high-speed reproduction is difficult is 64 Kbytes, and drive-specific information is sent from the host PC to the drive. 32 Kbytes of drive specific information (drive specific information storage area) used in the INQUIRY command for requesting is secured. These areas are arranged in the memory 400 because they do not require relatively high-speed access. Furthermore, 160 Kbytes of other information storage areas are secured in the memory 400.
[0100]
For example, if the determination result is DVD-R, the buffer memory (reproduction information storage area) that is required for high-speed reproduction by sequential read and that requires high-speed access is 224 Kbytes, the page pointer management variable of the buffer memory and the disk The outermost peripheral address information and the like (page pointer management variable storage area) is secured to 32 Kbytes. These areas are arranged in the faster access memory 300. Also, linking information and border information (storage area for linking information, etc.) used in situations where seek processing always occurs and high-speed playback is difficult, such as random access read, is 64 Kbytes, and drive-specific information from the host PC to the drive 32 Kbytes are secured for drive specific information (drive specific information storage area) used in an INQUIRY command for requesting. These areas are arranged in the memory 400 because they do not require relatively high-speed access. Furthermore, 160 Kbytes of other information storage areas are secured in the memory 400.
[0101]
For example, if the determination result is a DVD-ROM, the buffer memory (reproduction information storage area) that is used for high-speed reproduction by sequential read and that requires high-speed access is 224 Kbytes, the page pointer management variable of the buffer memory and the disk The outermost peripheral address information and the like (page pointer management variable storage area) is secured to 32 Kbytes. These areas are arranged in the faster access memory 300. Further, 32 Kbytes of drive specific information (drive specific information storage area) used in an INQUIRY command for requesting drive specific information from the host PC to the drive is secured. These areas are arranged in the memory 400 because they do not require relatively high-speed access. Furthermore, 224 Kbytes of other information storage area is secured in the memory 400.
[0102]
As described above, according to the fifth embodiment, a more efficient memory arrangement can be realized by using a system that combines an expensive high-speed memory and an inexpensive medium / low-speed memory. Therefore, it is possible to realize a low-cost and high-performance optical disk controller with a smaller number of terminals.
[0103]
Furthermore, according to the fifth embodiment, it is possible to automatically perform optimal placement in a plurality of memories in accordance with the type and type of optical disk or control information, and the entire capacity of the limited memory can be reduced to the type of optical disk. It can be effectively used according to the type or control information.
[0104]
(Embodiment 6)
FIG. 12 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to Embodiment 6 of the present invention. In FIG. 12, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. In the sixth embodiment, a port is a general-purpose terminal that functions as an input terminal or an output terminal. 12 has a function equivalent to that of the variable memory 25 in the first embodiment, but is not limited to being variable.
[0105]
A port control method of the multiport circuit that is important in the sixth embodiment will be described.
[0106]
In the sixth embodiment, the optical disk controller 6 includes a multiport circuit (general purpose terminal) 27 that functions as an input terminal or an output terminal, and a port control block (general purpose terminal control means) 26 that controls the multiport circuit 27. Further prepare. The multi-port circuit 27 can be connected to a plurality of circuits, and the CPU (memory control means) 21 determines the port control block so that the multi-port circuit is connected to a predetermined circuit among the plurality of circuits according to the determination result. To control.
[0107]
The servo circuit 39 measures the amplitude of the tracking error signal (TE), the focus error signal (FE), the light amount signal (AS), and the RF signal (RF) generated and processed by the signal processing circuit 5, and the measured signal or A combination signal of a plurality of measurement signals (comparison, addition / subtraction / multiplication / division calculation, etc.) is output to the optical disc discrimination block 7 in the optical disc controller 6 as disc discrimination data.
[0108]
The optical disc discriminating block 7 can discriminate the type of the loaded optical disc 2 by comparing the inputted discriminating data with a predetermined level set in advance. Here, the type indicates an optical disc having a different physical structure such as a DVD-ROM, a DVD-R, a DVD-RW, or a DVD-RAM.
[0109]
The discrimination result by the optical disc discrimination block 7 is transmitted to the CPU 21, and the CPU 21 transmits the optimum port setting for the loaded optical disc 2 according to the discrimination result of the optical disc discrimination block 7 (that is, transmits to the general-purpose terminal according to the discrimination result). To determine the signal to be set). The determined port setting is output as a command signal to the port control block 26, and the optimum setting of the actual multiport circuit 27 is performed. As described above, when the optical disk controller 6 according to Embodiment 6 of the present invention is used, even if an optical disk 2 of a different type or type is loaded in the optical disk apparatus 1, it can be reproduced stably and at high speed.
[0110]
Further, when the signal processing circuit 5 makes a determination using data such as FE and AS, it is preferable to store the result and the input measurement data at the fixed position. In this way, even when the disk is replaced with another disk, the type and type of the replaced disk can be accurately determined by comparing the newly obtained determination data with the stored data. The sixth embodiment is not limited in any way by the disc discrimination method and configuration.
[0111]
Next, the port setting of the multi-port circuit 27 in the optical disc apparatus 1 using the optical disc controller 6 according to the sixth embodiment will be described in more detail by taking the case where the type of the optical disc 2 to be reproduced is DVD-ROM or DVD-RAM as an example. To do.
[0112]
FIG. 13 shows a port setting example of the multiport circuit 27 set in accordance with the determination result of the optical disk determination block 7.
[0113]
Here, in the DVD-ROM disc, information is recorded on both the two 0.6 mm-thick substrates bonded together, and the focus position is moved by irradiating a light beam from the same direction. There is a single-sided dual-layer disc that can read signals from the recording surface. Therefore, a two-layer jump process for moving the focus position to each layer is necessary. On the other hand, in a DVD-RAM disc, since a single-sided dual-layer disc does not exist in the standard, a double-layer jump process is not necessary, but data recording is performed on both land and groove, which are track grooves formed on a signal recording surface. The method to let it be adopted. Therefore, land / groove (L / G) switching processing is required to switch the polarity of the tracking servo signal between the land portion and the groove portion in order to control the light beam so as to correctly follow the track.
[0114]
For example, as shown in FIG. 13A, when the determination result is a DVD-ROM single-sided dual-layer disc, a two-layer jump signal for moving the focus position to each layer is output and the focus drive circuit 32 is used. The focus actuator circuit 33 drives and controls the focus actuator. If the determination result is DVD-RAM, the tracking actuator circuit 35 is driven and controlled by the tracking actuator circuit 35 via the tracking drive circuit 34 by outputting an L / G switching signal. Thus, in the case of a DVD-RAM, two types of signals output from one terminal can be switched.
[0115]
In the DVD-ROM disc, data is recorded on the entire surface up to the maximum recording position of the disc, and a tracking error signal and an off-track signal generated by a detection signal from the optical pickup 3 moving in the radial direction with respect to the disc are recorded. Since the traveling direction of the optical pickup 3 can be detected by the phase difference, a brake pulse signal for stopping the optical pickup 3 at the target position is effective. On the other hand, in the DVD-RAM disk, since there is an unrecorded area, the detection of the traveling direction of the optical pickup 3 becomes inaccurate, and the brake pulse is invalid or has an adverse effect, but on the signal recording surface of the disk is cut in one spiral. An L / G switching pulse signal that switches the polarity of the servo signal accurately is indispensable for the land and groove, which are the track grooves, to accurately follow the light beam.
[0116]
Therefore, for example, as shown in FIG. 13B, when the determination result is a DVD-ROM, the traverse actuator circuit 37 is driven and controlled by the traverse actuator circuit 37 via the traverse drive circuit 36 by outputting a brake pulse signal. To do. When the determination result is DVD-RAM, the tracking actuator circuit 35 is driven and controlled by the tracking actuator circuit 35 via the tracking drive circuit 34 by outputting an L / G switching signal. Thus, in the case of a DVD-RAM, two types of signals output from one terminal can be switched.
[0117]
In the sixth embodiment, the configuration of switching the function and output of the output port has been described. For example, the first type disk functions as an input port, and the second type disk outputs. It may be configured to function as a port and switch between them.
[0118]
In the sixth embodiment, the general-purpose terminal is switched according to the determination result of the optical disc determination block 7. However, the present invention is not limited to this, and the general-purpose terminal is switched based on the control information of the information reproduction block 9. The terminal can be switched. With such a configuration, for example, the inner periphery of the disk is a read-only ROM area, the outer periphery is a recordable RAM area, or the first layer of the disk is a recordable RAM area, and the second layer is a partial ROM structure such as a ROM area. In this case, control track information corresponding to each area, or its boundary address, etc. can be obtained at high speed, enabling smooth switching between areas in the playback state and improving access performance. can do.
[0119]
As described above, when the sixth embodiment is used, it is possible to automatically switch the general-purpose terminals according to the type of the optical disc, and to effectively transmit the necessary signals according to the type of the optical disc. Is possible.
[0120]
(Embodiment 7)
FIG. 14 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to Embodiment 7 of the present invention. In FIG. 14, except for the timer setting block 28 and the variable timer 29, it is the same as that of the sixth embodiment, and detailed description thereof is omitted.
[0121]
A timer setting method of the variable timer 29 which is a main part in the seventh embodiment will be described.
[0122]
In the seventh embodiment, the optical disk controller 6 further includes a variable timer (timer) 29 and a timer setting block (timer control means) 28 for controlling the timer 29. The CPU (memory control means) 21 controls the timer setting block 28 so that the timer 29 can change the time interval between timer counts, the interrupt preset value, or the reset condition according to the determination result.
[0123]
The servo circuit 39 measures the amplitude of the tracking error signal (TE), the focus error signal (FE), the light amount signal (AS), and the RF signal (RF) generated and processed by the signal processing circuit 5, and the measured signal or A combination signal of a plurality of measurement signals (comparison, addition / subtraction / multiplication / division calculation, etc.) is output to the optical disc discrimination block 7 in the optical disc controller 6 as disc discrimination data.
[0124]
The optical disc discriminating block 7 can discriminate the type of the loaded optical disc 2 by comparing the inputted discriminating data with a predetermined level set in advance. Here, the type indicates an optical disc having a different physical structure such as a DVD-ROM, a DVD-R, a DVD-RW, or a DVD-RAM.
[0125]
The discrimination result by the optical disc discrimination block 7 is transmitted to the CPU 21, and the CPU 21 determines the optimum timer setting for the loaded optical disc 2 according to the discrimination result of the optical disc discrimination block 7. The determined timer setting is output as a command signal to the timer setting block 28, and the optimum setting of the actual variable timer 29 is performed. As described above, by using the optical disk controller 6 according to the seventh embodiment of the present invention, even if an optical disk 2 of a different type or type is loaded in the optical disk apparatus 1, it can be reproduced stably and at high speed.
[0126]
Further, when the signal processing circuit 5 makes a determination using data such as FE and AS, it is preferable to store the result and the input measurement data at the fixed position. In this way, even when the disk is replaced with another disk, the type and type of the replaced disk can be accurately determined by comparing the newly obtained determination data with the stored data. The seventh embodiment is not limited in any way by the disc discrimination method and configuration.
[0127]
Next, the setting of the variable timer 29 in the optical disc apparatus 1 using the optical disc controller 6 according to the seventh embodiment will be described in more detail by taking the case where the disc to be reproduced is DVD-ROM or DVD-RAM as an example.
[0128]
FIG. 15 shows a graph of the time-count value of the variable timer 29 set according to the discrimination result of the optical disc discrimination block 7.
[0129]
In FIG. 15, the vertical axis represents the timer count value, the horizontal axis represents time, and T1 and T2 represent timer setting values (time). The count value of the timer is incremented every time T1 and T2 set from the initial value zero. When the count value reaches a certain threshold value, the count value is cleared, and the count value is incremented again every time T1 and T2 set from zero.
[0130]
For example, it is assumed that the linear velocity measurement is performed when the rotational speed of the disk is controlled so that the rotational speed of the disk is synchronized with the reading speed of the recording data defined in the standard.
[0131]
When the determination result is DVD-RAM, the frequency of the signal (PLL clock) synchronized with the data recorded per rotation is about 29 MHz, and the set value of the timer is set to T1 at this time. When the determination result is a DVD-ROM, the frequency of the signal (PLL clock) synchronized with the data recorded per rotation is about 27 MHz, and the set value of the timer is set to T2 at this time. Even if the synchronous clock is changed by exchanging the disk, it is possible to accurately calculate the linear velocity and determine whether to wait for rotation, so that the access time does not increase.
[0132]
As described above, when the seventh embodiment is used, it is possible to automatically switch the setting condition of the timer according to the type of the optical disk, and reproduction (compatible reproduction) according to the type of the optical disk can be performed. Also, the reproduction performance is improved.
[0133]
In the seventh embodiment, the variable timer 29 is set according to the determination result of the optical disk determination block 7, but the present invention is not limited to this, and the control information of the information reproduction block 9 corresponding to the reproduction means is not limited. The timer setting of the variable timer 29 may be performed based on the above.
[0134]
With the above configuration, for example, the inner circumference of the disk is a read-only ROM area and the outer circumference is a recordable RAM area, or the first layer is a recordable RAM area and the second layer is a ROM area. In the case of such a partial ROM configuration, information on the control track corresponding to each area or its boundary address can be obtained at high speed, so that switching between areas can be performed smoothly in the playback state. And improve access performance
(Embodiment 8)
FIG. 16 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to an eighth embodiment of the present invention. FIG. 16 is the same as that of the seventh embodiment except that the timer setting block 28 and the variable timer 29 are removed.
[0135]
In the eighth embodiment, based on the determination result, the information reproduction block (reproduction means) 9 is configured to output the control information reproduced by the information reproduction block 9 to the memory 40.
[0136]
The optical disc device 1 and the host controller 22 according to the eighth embodiment operate as shown in the flowchart of FIG.
[0137]
First, the servo circuit 39 measures the amplitudes of the tracking error signal (TE), the focus error signal (FE), the light amount signal (AS), and the RF signal (RF) generated and processed by the signal processing circuit 5 and measures them. A signal or a combination signal of a plurality of measurement signals (comparison, addition / subtraction / multiplication / division calculation, etc.) is output to the optical disc discrimination block 7 in the optical disc controller 6 as disc discrimination data (step S1).
[0138]
The optical disc discriminating block 7 discriminates the type of the loaded optical disc 2 by comparing the inputted discriminating data with a predetermined level set in advance. Here, the type is information relating to the type of an optical disc having a different physical structure, such as a DVD-ROM, DVD-R, DVD-RW, or DVD-RAM.
[0139]
The discrimination result by the optical disc discrimination block 7 is transmitted to the CPU 21.
[0140]
Next, the CPU 21 determines the type of the optical disc (step S2). When the CPU 21 discriminates the DVD-RAM, the CPU 21 issues a search command to the information search block 8 for a predetermined area of the optical disc 2 in which the defect management information is stored (step S3). Further, a start command and movement data (the number of searches, etc.) are output to the servo circuit 39 so as to move to an area where defect management information is stored. The servo circuit 39 executes necessary processing in accordance with the input start command and movement data, and further generates a drive signal for a traverse (not shown) that moves the optical pickup 3 in the radial direction of the disk 2 to generate a desired signal. Search for the region. After the search is completed, the defect management information stored in the desired area is input to the buffer memory 40 via the AMP 4, the signal processing circuit 5, and the information reproduction block 9 (step S4). The input information is stored in the defect management information storage unit at a predetermined position on the buffer memory 40.
[0141]
Next, similarly to the defect management information, the control information other than the defect management information unique to the optical disk 2 stored in the predetermined area of the optical disk 2 is searched (step S5), and the desired control information is stored in the buffer memory 40. The information is stored in the control information storage unit at the predetermined position above (step S6).
[0142]
If it is determined in step S2 that it is a DVD-ROM, since defect management information does not exist, the process proceeds to step S5. Here, similarly to the above, control specific to the optical disk 2 stored in a predetermined area of the optical disk 2 is performed. Search for information. In step S6, desired control information may be stored in a control information storage unit at a predetermined position on the buffer memory 40. In this case, access may be executed along addresses and data that exist physically and spatially continuously.
[0143]
Further, when it is determined in step S2 that the DVD-R / RW is determined, in step S333 and step S444, linking information is acquired instead of the defect management information by the same method as described above. In step S5, control information other than linking information is acquired.
[0144]
As described above, in the eighth embodiment, it is possible to acquire necessary control information according to the type of the optical disk without depending on the input signal from the host controller 22.
[0145]
(Embodiment 9)
Next, in the ninth embodiment, a configuration for realizing the information linking process, the information complementing process, and the information extracting process will be described. Here, the information linking process is a process of continuously storing information stored at discontinuous positions such as replacement information of defect information in DVD-RAM and information discontinuous due to linking in DVD-R / RW. It is a process to connect to the information. The information complementing process is a process of complementing information corresponding to an area without information, such as information on an unrecorded area in DVD-RAM or error-correctable information recorded by AV recording, with specific dummy information. That is. Furthermore, the information extraction process is a process of extracting information such as voice, data, and images as necessary.
[0146]
FIG. 18 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to the ninth embodiment of the present invention.
[0147]
In the ninth embodiment, the optical disk controller 6 further includes an information connection block (information connection means) 10 for connecting defective or discontinuous portions of user data stored in the memory. The control information includes defect management information for repairing a defective portion of user data or linking information for repairing a discontinuous portion of user data. The CPU (memory control means) 21 uses the defect management information or the linking information to control the information connection block 10 so that the discontinuous portions of the user data are connected.
[0148]
The optical disk controller 6 may further include an information complement block (information complement means) 11 that complements an unrecorded portion of user data. The information complementing block 11 supplements an unrecorded portion of user data with predetermined dummy information.
[0149]
The optical disk controller 6 may further include an information extraction block (information extraction means) 15 that extracts information from the memory. The information extraction block 15 extracts information from the memory 40 in accordance with the determination result or a command from the host controller 22 connected to the optical disk controller 6.
[0150]
FIG. 19 is a flowchart showing a flow of defect management operations for realizing the information linking process by the information linking block 10, the information complementing process by the information complementing block 11, and the information extracting process by the information extracting block 15 in the ninth embodiment. is there.
[0151]
FIG. 20 is a flowchart showing the flow of the linking operation for realizing the information linking process by the information linking block 10, the information complementing process by the information complementing block 11, and the information extracting process by the information extracting block 15 in the ninth embodiment. .
[0152]
A configuration for realizing the information linking process, the information complementing process, and the information extracting process will be described with reference to FIG. 18, FIG. 19, and FIG.
[0153]
When the host controller 22 issues a command to read reproduction information located in an arbitrary area of the disc via the user I / F block 30, the optical disk controller 6 arbitrarily starts from the head of the designated area on the optical disc. The reproduction information is sequentially acquired for each length (block). In FIG. 19, when it is determined that the disc is a DVD-RAM, the CPU 21 determines, for each block, whether the block information is defect information based on the defect management information stored in the buffer memory 40 in advance (step S7). .
[0154]
If it is defect information, the CPU 21 first acquires the position where normal reproduction information, which is replacement information of the defect information, is stored based on the defect management information, and sends it to the information search block 8 to the acquired position. A search command is issued (step S9). The information search block 8 that has received the search command outputs an activation command and movement data (such as the number of searches) to the servo circuit 39 so that the optical pickup 3 moves to the target position. The servo circuit 39 performs necessary processing in accordance with the input start command and movement data, and further generates a drive signal for a traverse (not shown) that moves the optical pickup 3 in the radial direction of the optical disc 2. Search for the target position.
[0155]
After the search is completed, the information reproduction block 8 acquires the replacement information via the AMP 4 and the signal processing circuit 5 (step S10), and outputs it to the information connection block 10. Further, the information linking block 10 links the input replacement information with the information already acquired in the buffer memory 40 in accordance with a command from the CPU 21 based on the defect management information (step S11). 40.
[0156]
In FIG. 20, when it is determined that the disc is a DVD-RAM, based on the linking information acquired in advance in the buffer memory 40, the CPU 21 determines whether the block information is a linking area for each block (step S37). ).
[0157]
If it is a linking area, the CPU 21 first acquires the position where the information discontinuous due to the linking area is stored based on the linking information, and sends a search command to the information search block 8 for the acquired position. Issue (step S39). Upon receiving the search command, the information search block 8 outputs an activation command and movement data (the number of searches, etc.) to the servo circuit 39 so that the optical pickup 3 moves to the target position. The servo circuit 39 performs necessary processing in accordance with the input start command and movement data, and further generates a drive signal for a traverse (not shown) that moves the optical pickup 3 in the radial direction of the optical disc 2. Search for the target position.
[0158]
After the search is completed, the information reproduction block 9 acquires the discontinuous information via the AMP 4 and the signal processing circuit 5 (step S310), and outputs it to the information connection block 10. Further, the information connection block 10 connects the input discontinuous information in response to a command from the CPU 21 based on the linking information with the information already acquired in the buffer memory 40 (step S311). And stored in the buffer memory 40.
[0159]
If it is neither the defect information nor the linking area, the position where the reproduction information is stored is searched in step S8 of FIG. 19 or FIG. After the search is completed, the information reproduction block 9 acquires the reproduction information via the AMP 4 and the signal processing circuit 5 and stores it in the buffer memory 40 in step S12.
[0160]
However, for example, if the search position is an unrecorded area or AV recording area where data error correction cannot be performed, the information reproduction block 9 informs that the reproduction information cannot be acquired in step S13. This is transmitted to the complement block 11. In step S14, the information complementing block 11 detects unrecorded information or AV recorded information generated by the servo circuit 39, generates dummy information of a null code, and stores it in the buffer memory 40.
[0161]
In this way, even if the information to be reproduced is physically divided in the replacement process by defect management or the linking process by linking information, the replacement information corresponding to the defect information or the information discontinuous by linking automatically. Therefore, the host controller (host computer) can access the necessary area without being particularly conscious of the type of the optical disk. In addition, even if a read command is issued to an area without information (an unrecorded area or an area where error-correctable information is stored), dummy information is automatically filled (complemented), causing an error in the host controller. And the validity of the data can be maintained.
[0162]
Further, in step S15, in response to a request for reproduction information from the host controller 22, it is determined whether or not the reproduction information has been acquired. If the reproduction information acquisition has not ended, the process returns to step S7 (or step S37) again and the above process is repeated.
[0163]
If the acquisition of reproduction information has been completed, output control based on navigation information is performed in step S17. For example, in the case of DVD-VIDEO information, MPEG Video information (for example, aspect ratio 16: 9 correspondence information and aspect ratio required for reproduction) based on navigation information included in the reproduction information stored in the buffer memory 40 that has already been acquired. Ratio 4: 3 correspondence information, etc.), caption information (eg, Japanese information, English information, etc.) image information extraction, or audio information (eg, Dolby Digital audio information, linear PCM information, MPEG audio information, etc.) and sub audio Information extraction (for example, English or Japanese) is automatically performed by the information extraction block 15.
[0164]
As described above, in the optical disc apparatus 1 including the optical disc controller 6 of the present invention, it is possible to promptly output information extracted in response to a request from the host controller 22. Further, the host controller 22 only needs to perform minimum command issuing processing, error processing, and mechanical control processing. Therefore, the resources and processing speed can be reduced, and the model can be developed more easily.
[0165]
Further, in the ninth embodiment, it is possible to automatically reproduce only by the optical disk controller 6 by connecting or complementing information recorded on disks having different logical structures. Further, for information that needs further processing, information is extracted in response to a request from the host controller 22 or an output means, and audio and images can be reproduced.
[0166]
(Embodiment 10)
Next, as the tenth embodiment, a configuration and operation for realizing copyright processing will be described.
[0167]
FIG. 21 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to the tenth embodiment of the present invention. The optical disc apparatus 1 according to the tenth embodiment realizes copyright processing.
[0168]
In the tenth embodiment, information encrypted based on predetermined key information is stored on the optical disc 2. The optical disk controller 6 further includes a decryption / decryption block (decryption / decryption means) 17 for decrypting the encrypted information.
[0169]
FIG. 22 is a flowchart of an operation for realizing copyright processing. Hereinafter, the copyright processing will be described in detail with reference to FIGS. 21 and 22.
[0170]
In DVD-VIDEO discs, there is a strong demand from the movie industry in particular, and a copyright protection system using encryption technology is indispensable to prevent unauthorized copying of movie information recorded on the disc by a general user on a computer. . For example, in CSS (Contents Scrambling System), which is a copyright protection system adopted for DVD playback devices, a master key corresponding to a manufacturer licensed from the CSS management mechanism is stored in the control information storage unit on the buffer memory 40. Pre-embedded.
[0171]
First, an encrypted disk key (encrypted disk key) that is control information unique to the optical disk 2 stored in a predetermined area of the optical disk 2 is read (step 18). The information reproduction block 9 adds the buffer memory 40 to the decryption / decryption block 17 that performs decryption of the reproduced signal at the same time as performing decryption of the reproduced signal encrypted based on the key information with respect to the read encrypted disk key. To output. The decryption / decryption block 17 reads the master key stored in the control information storage unit on the buffer memory 40. Further, the decryption / decryption block 17 decrypts the encrypted disk key that has already been input using the read master key, and stores the decrypted disk key in the control information storage unit on the buffer memory 40.
[0172]
Next, in step S 19, the decrypted decryption block 17 decrypts the encrypted title key using the disc key, and stores the decrypted title key in the control information storage unit on the buffer memory 40.
[0173]
In step S20, when the host controller 22 issues a command to read the encrypted title information recorded on the disc via the user I / F block 30, the information reproduction block 9 The converted title information is output to the decryption / decryption block 17 via the buffer memory 40. Further, the decryption / decryption block 17 decrypts the encrypted title information using the title key, and outputs it to the reproduction information output unit 23 in the host controller 22 via the I / F circuit 18. In step S21, the reproduction information output unit 23 outputs the decoded title information to an external device such as a display.
[0174]
In this way, the host controller 22 only needs to perform minimum command issue processing for reproduction, error processing, and mechanical control processing, and can suppress the resources and processing speed, so that the model development can be further facilitated. It becomes possible. In addition, the encryption mechanism can be analyzed by a general-purpose bus monitor or the like by incorporating processing with high security such as CSS processing (copyright management, copy prevention processing) based on the key information as described above into the optical disk controller 6. It becomes impossible to provide a highly reliable copyright management process and apparatus.
[0175]
(Embodiment 11)
FIG. 23 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to an eleventh embodiment of the present invention. In FIG. 23, except for the comparison block 20, since it is equivalent to Embodiment 10, detailed description is abbreviate | omitted.
[0176]
In the eleventh embodiment, the optical disk controller 6 compares the control information read from the optical disk 2 with the preliminary control information preset by the host controller 22 connected to the optical disk controller 6 (comparison means). ) 20 is further provided. When the control information matches the preliminary control information, the information reproduction block reproduces the optical disc 2.
[0177]
A configuration for realizing area-limited reproduction that enables reproduction only in an important limited area in the eleventh embodiment will be described with reference to the flowchart of FIG.
[0178]
First, I will explain the regional code that protects the unique mechanism of the boxing rights of movie information recorded on the disc.
[0179]
The regional code is a mechanism that prevents a product (disc) released for a certain region from being played back in other regions, and a code that categorizes the whole world into six regions is defined. For example, when the regional code recorded on the disc and the regional code set on the playback device side are both for Japan, the information recorded on the disc can be reproduced. Also, if the regional code recorded on the disc is for the United States and the regional code set on the playback device is for Japan, the information recorded on the disc cannot be reproduced.
[0180]
A first regional code which is first control information which is control information necessary for region-limited reproduction of reproduction information recorded on the disc is stored from the optical disc 2 onto the buffer memory 40. The user I / F block 30 stores the second regional code, which is the second control information set by the user, on the buffer memory 40 via the I / F circuit 18. The first regional code and the second regional code are input to the comparison block 20 to confirm the match (step S25). The result obtained by the comparison block 20 is transmitted to the information reproduction block 9.
[0181]
When the results in the comparison block 20 match, the information reproduction block 9 outputs the read reproduction information to the reproduction information output unit 23 via the buffer memory 40. Then, the reproduction information output unit 23 outputs the reproduction information to an external device such as a display (step 26).
[0182]
On the other hand, when the results in the comparison block 20 do not match, the information reproduction block 9 does not output reproduction information. Furthermore, the host controller 22 issues a warning on the front menu or on the PC based on the information that the first regional code and the second regional code obtained through the buffer memory 40 and the I / F circuit 18 do not match. Error WINDOW can be displayed, and the user can be requested to rewrite the corresponding code of the playback application or to replace the disc.
[0183]
As described above, when the eleventh embodiment is used, the optical disk controller 6 can automatically reproduce so that the information recorded on the loaded disk is reproduced only in the permitted area. And
[0184]
In this embodiment, the first regional code and the second regional code are stored in the same buffer memory 40. However, the first regional code and the second regional code are separately stored. You may make it the structure stored in memory.
[0185]
(Embodiment 12)
FIG. 25 shows a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to a twelfth embodiment of the present invention. In FIG. 25, since the components other than the audio selection block 43, the audio adjustment block 44, the D / A conversion block 41, and the speaker 42 corresponding to the audio selection means are the same as those in Embodiment 11, detailed description thereof is omitted.
[0186]
In the twelfth embodiment, the optical disk controller 6 uses a predetermined language (for example, Japanese, English, etc.) from at least one audio information extracted from the memory 40 in accordance with a command from the host controller 22 connected to the optical disk controller 6. ) Voice selection block (voice selection means) 43 for selecting voice information, and a voice adjustment block (voice adjustment means for adjusting the voice information of a predetermined language selected by the voice selection block so as to have a predetermined volume / sound quality. 44).
[0187]
The voice selection block 43 receives voice information in at least one country language extracted by the information extraction block 15. Next, a language setting parameter set by the user is sent to the voice selection block 43 via the user I / F block 30, and in accordance with the language setting parameter, a predetermined language is selected from voice information in the language of at least one country. Audio information is selected. When voice information in a predetermined language is input to the voice adjustment block 44, the volume / sound quality setting parameter set by the user is sent to the voice adjustment block 44 via the user I / F block 30, and the volume / sound quality is set. In accordance with the setting parameters, the audio information in a predetermined language is adjusted to have a predetermined volume / sound quality.
[0188]
The final digital audio information adjusted as described above is converted into analog audio information by the D / A conversion block 41 that converts a digital signal into an analog signal, and is output as audio from the speaker 42.
[0189]
Furthermore, according to the twelfth embodiment, not only the above-described sound conversion but also operations such as sound conversion of the left and right independent speakers 42, mute and release, surround and noise reduction ON / OFF are performed on the front panel and PC. It can be easily realized with a mouse click of the app. Then, the optical disk controller 6 can automatically recognize a request from the host controller 22 and automatically execute processing according to the operation by internal sequence control.
[0190]
【The invention's effect】
The present invention makes it possible to reproduce or record an optical disc stably and at high speed even when optical discs of different types or types are loaded in the optical disc apparatus.
[0191]
Furthermore, according to the present invention, it is possible to automatically switch the general-purpose terminals according to the type and type of the optical disc, and it is possible to transmit a signal according to the type and type of the optical disc.
[0192]
Further, according to the present invention, it becomes possible to automatically switch the setting condition of the timer according to the type and type of the optical disk, and even if the synchronization clock changes depending on the optical disk loaded in the optical disk apparatus, the accurate linear velocity can be changed. Calculations and waiting for rotation can be made, and performance can be secured without increasing the access time.
[0193]
Furthermore, according to the present invention, it is possible to obtain necessary control information even if the optical disk itself has a defect.
[0194]
Further, according to the present invention, even if the information to be reproduced is physically divided, the replacement information corresponding to the defect information or the information discontinuous due to linking is automatically searched for and connected, so that the host controller or the host Computers can now access necessary areas without being aware of the type of optical disk. Even if a read command is issued for an area with no information (an unrecorded area or an area in which error-correctable information is stored), dummy information is automatically filled (complemented) so that the host computer or host controller It is now possible to prevent errors and maintain the validity of data.
[0195]
Furthermore, according to the present invention, since it is possible to perform processing with a high degree of security, it becomes impossible to analyze the encryption mechanism with a general-purpose bus monitor or the like, and to provide a highly reliable copyright management processing and apparatus. Became possible.
[0196]
Furthermore, according to the present invention, it is possible to reproduce only in an area where the information recorded on the loaded optical disk is permitted.
[0197]
Furthermore, according to the present invention, the optical disk controller can automatically recognize a request from the host controller, and can automatically execute processing according to the operation by internal sequence control.
[0198]
Furthermore, according to the present invention, by optimally allocating resources to the optical disk controller in the optical disk apparatus, it is possible not only to realize reproduction (or recording) processing of different types of optical disks with limited resources, but also to the CPU so far. By automating the functions realized by this software with the optical disk controller, it becomes possible to share the software of the CPU without being particularly aware of the type of optical disk to be reproduced (or recorded). As a result, it is possible to reduce the program capacity of the CPU and the development man-hours, and it is possible to quickly develop a high-performance and highly reliable optical disc apparatus that realizes compatibility of many types of optical discs. .
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to a first embodiment of the present invention.
FIG. 2 is a diagram showing an example of arrangement information (map) arranged in the variable memory 25 in accordance with the determination result or control information of the optical disk determination block.
FIG. 3 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to a second embodiment of the present invention.
FIG. 4 is a diagram illustrating an example of arrangement information (map) arranged in a variable memory according to a determination result of a reproduction information type determination block.
FIG. 5 is a diagram illustrating an example of arrangement information (map) arranged in a variable memory when it is determined by the reproduction information type determination block that the reproduction information is sufficient even at a low transfer rate.
FIG. 6 is a diagram showing a configuration of an optical disk device including an optical disk controller that controls recording or reproduction of an optical disk according to a third embodiment of the present invention.
FIG. 7 shows a variable when a part of the variable memory is used as a ring buffer and the size of the ring buffer is variable depending on the error rate or the number of error corrections of the reproduction information acquired from the optical disc through the information reproduction block. The figure which shows an example of the arrangement | positioning information (map) arrange | positioned to memory
FIG. 8 is a diagram showing a configuration of an optical disc apparatus 1 including an optical disc controller 6 that controls recording or reproduction of an optical disc according to a fourth embodiment of the present invention.
FIG. 9 is a diagram illustrating a port setting example of a multi-port circuit set according to a determination result of a reproduction information type determination block;
FIG. 10 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to a fifth embodiment of the present invention.
FIG. 11 is a diagram showing an example of arrangement information (map) arranged in the first memory (memory 300) and the second memory (memory 400) in accordance with the determination result or control information of the optical disk determination block.
FIG. 12 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to a sixth embodiment of the present invention.
FIG. 13 is a diagram showing a port setting example of a multi-port circuit set according to the determination result of the optical disk determination block;
FIG. 14 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to a seventh embodiment of the present invention.
FIG. 15 is a graph showing a time-count value graph of a variable timer set in accordance with a determination result of an optical disk determination block;
FIG. 16 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to an eighth embodiment of the present invention.
FIG. 17 is a flowchart showing operations of the optical disk device and the host controller according to the eighth embodiment.
FIG. 18 is a diagram showing a configuration of an optical disc device including an optical disc controller that controls recording or reproduction of an optical disc according to a ninth embodiment of the present invention.
FIG. 19 is a flowchart showing a flow of defect management operations for realizing information connection processing by an information connection block, information supplement processing by an information complement block, and information extraction processing by an information extraction block in the ninth embodiment.
FIG. 20 is a flowchart showing a flow of a linking operation that realizes an information linking process by an information linking block, an information complementing process by an information complementing block, and an information extracting process by an information extracting block in the ninth embodiment.
FIG. 21 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to a tenth embodiment of the present invention.
FIG. 22 is a flowchart of an operation for realizing copyright processing.
FIG. 23 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to an eleventh embodiment of the present invention.
FIG. 24 is a flowchart for realizing region-limited reproduction that allows reproduction only in a limited region according to the eleventh embodiment.
FIG. 25 is a diagram showing a configuration of an optical disc apparatus including an optical disc controller that controls recording or reproduction of an optical disc according to a twelfth embodiment of the present invention.
FIG. 26 is a diagram showing the configuration of an optical disk apparatus in which an external RAM is connected to the optical disk controller of the present invention.
[Explanation of symbols]
1 Optical disk device
2 Optical disc
3 Optical pickup
4 AMP (Amplifier)
5 Signal processing circuit
6 Optical disk controller
7 Optical disc discrimination block
8 Information search block
9 Information playback block
10 Information connection block
11 Information Completion Block
15 Information extraction block
16 RAM
17 Decryption block
18 I / F circuit
20 comparison blocks
21 CPU
22 Host controller
23 Playback information output section
24 Placement control block
25 Variable memory
26 Port control block
27 Multi-port circuit
28 Timer setting block
29 Variable timer
30 User I / F block
32 Focus drive circuit
33 Focus actuator circuit
34 Tracking drive circuit
35 Tracking actuator circuit
36 Traverse drive circuit
37 Traverse Actuator Circuit
39 Servo circuit
40 buffer memory
41 D / A conversion block
42 Speaker
43 Voice selection block
44 Audio adjustment block

Claims (13)

At least the standard type is a read-only disc, a recordable disc, a rewritable disc, an optical disc controller that controls recording or playback of an optical disc,
A rewritable memory for storing information necessary for recording or reproduction of the optical disc;
Discriminating means for discriminating the type or type of the standard of the optical disc from disc discriminating data based on a reproduction signal ;
Memory control means for arranging the memory according to the determination result by the determination means;
Search means for searching for an area in which the control information of the optical disc is recorded based on the determination result by the determination means;
Playback means for playing back the control information recorded in the area searched by the search means ,
The optical disk controller , wherein the memory control means refers to the control information reproduced by the reproduction means and arranges the memory . The optical disc controller according to claim 1, wherein the discrimination result and the disc discrimination data are stored in a fixed position of the memory. 2. The optical disk controller according to claim 1, wherein an area for storing the information necessary for reproduction in the memory is arranged in a larger order in the order of a recordable disk, a reproduction-only disk, and a rewritable disk. 4. The optical disk controller according to claim 1, wherein an area for storing information relating to copyright management is arranged in the case of a read-only disk. 4. The optical disk controller according to claim 1, wherein an area for storing information related to defect management is arranged in the case of a rewritable disk. 4. The optical disk controller according to claim 1, wherein an area for storing information related to linking is arranged in the case of a recordable disk. 3. The optical disc controller according to claim 1, wherein the disc discrimination data is any one or a combination of a tracking error signal, a focus error signal, a light amount signal, and an RF signal. Wherein based on the determination result, the reproducing means outputs the control information to said reproducing means is reproduced to said memory, an optical disk controller of claim 1 or 7. Further comprising a reproduction information type determining means for determining the different types of reproduction information recorded on the optical disc, when the type of the reproduction information is video data, to store the reproduction control information necessary for reproducing in said memory The optical disk controller according to claim 1, wherein the optical disk controller controls the reproducing unit. The optical disc controller according to claim 9, wherein the reproduction control information is control information such as navigation information, subtitles, and audio. An optical disc control method for controlling recording or reproduction of an optical disc, wherein at least the type of the standard is a read-only disc, a recordable disc, or a rewritable disc, and is rewritable for storing information necessary for recording or reproduction of the optical disc. An optical disk control method using a memory,
A memory storing step for storing information necessary for recording or reproduction of the optical disc in a rewritable memory;
A discriminating step for discriminating the type or type of the standard of the optical disc;
A memory control step of arranging the memory according to the result of the determination step;
A search step for searching an area in which control information of the optical disc is recorded based on a determination result by the determination unit;
Playing back the control information recorded in the area searched by the search means,
The memory control step refers to the control information reproduced by the reproduction step and arranges the memory.
Optical disk control method. At least the standard type is a read-only disc, a recordable disc, or a rewritable disc, an optical disc control device that controls recording or playback of the optical disc, and rewritable that stores information necessary for recording or playback of the optical disc An optical disk control device equipped with a memory,
Memory storage means for storing information necessary for recording or reproduction of the optical disc in a rewritable memory;
Discriminating means for discriminating the type or type of the standard of the optical disc;
Memory control means for arranging the memory according to the determination result by the determination means;
Search means for searching for an area in which the control information of the optical disc is recorded based on the determination result by the determination means;
Reproducing means for reproducing the control information recorded in the area searched by the search means,
The memory control means refers to the control information reproduced by the reproduction means and arranges the memory;
Optical disk control device. At least the type of standard is a read-only disc, a recordable disc, a rewritable disc, an optical pickup that emits a light beam to the optical disc and detects reflected light from the optical disc as a signal,
A signal processing circuit for performing predetermined processing on the signal from the optical pickup;
A servo circuit for moving the optical pickup;
The optical disk controller according to any one of claims 1 to 10, which receives a signal processed from the signal processing circuit and controls the servo circuit;
An optical disk device comprising:

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