JP4972064B2 - Optical disk drive control device - Google Patents

Description

  The present invention relates to an optical disk drive control device that controls driving of a portable optical disk.

  Portable optical discs such as CD (Compact Disc), DVD (Digital Versatile Disc), and BD (Blu-ray Disc) are cheaper than ordinary fixed recording media such as HDD (Hard Disk Drive). There is a problem that access speed is slow. For this reason, when data with frequent random access is handled, a method of copying information on an optical disk to a recording medium that can be accessed at high speed such as an HDD is generally used. For example, a PC operating system (OS) installed from a CD to an HDD is generally used, and map data of a car navigation system is copied from a DVD to an HDD for use or updating. Has been done.

  However, when trying to access data on an optical disk while copying data from the optical disk to another recording medium, the access to the copy source optical disk increases rapidly, so that the operation itself is not accepted. Even if the design is acceptable, the copy speed and the read speed are greatly reduced, and the total processing time is longer than when the copy process and the read process are performed separately. There is a problem of becoming. The large decrease in copy speed and read speed is mainly due to the optical pickup used to request access to different locations on the optical disk in the copy process and the read process in other processes, and consequently to read data from the optical disk. This happens because you have to move frequently.

  As such a scene, for example, a scene in which video data in an optical disk is backed up and played back simultaneously can be assumed. However, in this case, a problem such as an output video being interrupted occurs. In addition, when booting an OS using a bootable disk, it may be assumed that an operation such as starting an application is performed before the OS data is completely read into a RAM (Random Access Memory) area. Data reading and application data reading occur at the same time, and as a result, it takes a long time to be used comfortably.

  As described above, while the data in the optical disk is being copied to another recording medium, other operations involving access to the optical disk cannot be performed, or even if other operations can be performed, the response is delayed. It can be said that the current situation is inconvenienced by users.

  Some users know the cause of these problems from experience, and avoid the problem by not performing operations that would cause other disk accesses when accessing the disk. It is hard to say that it is a realistic solution.

In Patent Document 1, in a recording medium control device operated by a battery, a reuse determination unit determines whether or not data remaining in a buffer memory can be reused as reproduction data. Discloses a technique for controlling reproduction data remaining in the buffer memory to be reused without re-acquiring reproduction data. Such control improves the point that the amount of movement of the pickup is large and the current consumption increases when reading data.
JP 2005-293654 A

  However, even if the technique described in Patent Document 1 is applied as a process during copy processing, if access to a location different from the recording location on the optical disk of data being copied is requested, it cannot be reused. As a result, the optical pickup moves frequently. As a result, the reading speed is greatly reduced by this movement process, and the total processing time is longer than that in the case where the copy process and the read process are performed separately, which takes more time.

  The present invention has been made in view of the above-described circumstances, and smoothly accesses an optical disc caused by both copy processing and other read processing without conscious operation by the user. It is an object of the present invention to provide an optical disk drive control device that can be used.

In order to solve the above-described problem, a first technical means of the present invention is an optical disk drive control device for controlling reading of data recorded on a portable optical disk, and a copy of the data recorded on the optical disk. A memory for recording data, a volatile memory for temporarily recording data read from the optical disc through an optical pickup, and (a) a copy process for recording data on the optical disc in the memory And (b) a control unit that controls execution of transmission processing for transmitting data to be transmitted to a request source when receiving a transmission request for data recorded on the optical disc; The copy process reads data from the optical disc by the optical pickup, temporarily records the read data in the volatile memory, and Data is transferred from the volatile memory to the memory, and the transmission process receives the transmission request for data recorded on the optical disc, the data subject to the transmission request, The memory is searched in the order of the optical disk, read into the volatile memory, temporarily recorded, and transmitted to the request source. The controller copies the data recorded on the optical disk to the memory. If the execution of the copy process is requested until completion of the process, and the execution of the copy process and the execution of the transmission process are requested at the same time, (I) the transmission process is prioritized over the copy process. to such control, and transmits the temporarily stored in the volatile memory data read from the optical pickup from the optical disk by the execution of (II) said transmission processing In this case, the data in the volatile memory is controlled to be retained after transmission, and when the transmission process is completed, the data in the volatile memory that has been transmitted in the transmission process is copied as the copy process. And (III) when the transmission process is being executed, when the remaining recordable amount of the volatile memory is exhausted, the transmission process is interrupted and the transmission is performed. The copy process is executed by moving the data in the volatile memory that has been transmitted in the process to the memory, and the transmission process is performed when the remaining recordable amount of the volatile memory is restored to a predetermined amount. It is characterized by controlling to resume .

According to a second technical means, in the first technical means, the control unit moves the data in the volatile memory that has been transmitted in the transmission process to the memory as the copy process after the transmission process is completed. Thereafter, data is read from the optical disk to the volatile memory temporarily, starting from the position of the optical pickup read from the optical disk in the transmission process or the position corresponding to the uncopied data closest to the position. Recording data and controlling to move the data to the memory.

According to a third technical means, in the second technical means, the control unit starts the copy process from the start point, reads the position of the optical pickup from the optical disk in the transmission process, and the copy. Control is performed so as to be executed only when the predetermined position of the pickup indicated by the request for execution of the process is separated by a predetermined distance or more. If not, the copy process is started from the predetermined position. It is characterized by controlling.

According to a fourth technical means, in any one of the first to third technical means, the request for execution of the copy process is made when the optical disc is mounted or when a predetermined user operation is received. It is a feature.

According to a fifth technical means, in any one of the first to fourth technical means, an optical disk driving device provided with a device for rotating the optical disk and the optical pickup is provided.

According to a sixth technical means, in any one of the first to fourth technical means, a connection interface for connecting to the optical disk driving device provided with the device for rotating the optical disc and the optical pickup is provided. It is what.

A seventh technical means is any one of the first to sixth technical means, wherein the data recorded on the optical disc includes an operating system program to be executed by the request source. .

  According to the present invention, it is possible to smoothly access an optical disk caused by both a copy process and another read process without the user having to refrain from performing an operation.

  FIG. 1 is a diagram showing a configuration example of an optical disk drive control device according to an embodiment of the present invention. In FIG. 1, 10 is an optical disk drive control device, and 20 is a host device. The optical disk drive control device 10 includes an optical pickup 11, a high frequency integrated circuit (RF IC) 12, a motor driver 13, a spindle motor 14, a RAM 16, a CPU (Central Processing Unit) 17, a DSP (Digital Signal Processor) 18, and an ATA (AT Attachment) interface (I / F) 19 is provided.

  The optical disk drive control device 10 is configured to be able to read data from a portable optical disk (hereinafter simply referred to as an optical disk). Here, the optical disk refers to an optical medium such as BD, DVD, CD, etc. Even if the structure is multilayer, it is applicable not only to read-only / read-write media. A magneto-optical disk can also be applied as the optical disk.

  The CPU 17 controls the entire optical disk drive control device 10. In the configuration example of FIG. 1, the CPU 17 controls reading / writing of data with respect to the RAM 16 and the control of the DSP 18, and the DSP 18 controls other components. The CPU 17 also controls read / write of the flash memory 15 described later.

  The ATA I / F 19 is an interface for connecting the optical disc drive control apparatus 10 and the host device 20, receives a transmission request for data recorded on the optical disc from the host device 20, and returns the data to the host device 20. This transmission request is received by the CPU 17 via the ATA I / F 19 and the DSP 18. Hereinafter, the process of transmitting the data requested for transmission to the request source (host apparatus 20) when receiving a transmission request for data recorded on the optical disc from the host apparatus 20 is referred to as a transmission process. For example, the CPU 17 stores a transmission processing program for controlling transmission processing in the internal ROM of the CPU 17 so as to be executable, and reads and executes the transmission processing program in the internal RAM of the CPU 17 when a transmission request is received. Thus, execution control of the transmission process becomes possible.

  An example of the host device 20 is a personal computer (PC). In this case, the optical disk drive control device 10 is externally connected to a PC that is the host device 20. Of course, the host device 20 may be a main board or the like inside the PC. In that case, the optical disk drive control device 10 is mounted on the PC while being connected to the main board which is the host device 20. become. Other examples of the host device 20 include a recording device, a playback device, or a main board thereof. When a recording device or a playback device is adopted as the host device 20, the optical disk drive control device 10 is connected to the outside of the device, but the device has the same or the features of the present invention as the device 10. It is also possible to mount another optical disk drive control device that does not.

  The spindle motor 14 is a motor for lifting and rotating an optical disk mounted on a disk mounting table (not shown), and the motor driver 13 is a drive circuit for controlling the rotation. The DSP 18 can start / stop rotation of the motor driver 13 and control the number of rotations. For example, when there is a transmission request from the host device 20 via the ATA I / F 19, the CPU 17 instructs the motor driver 13 to start rotation via the DSP 18, and the target data requested for transmission has been transmitted. Then, the motor driver 13 may be instructed to stop the rotation.

  The optical pickup 11 includes a light source such as a laser diode, a detection unit such as a lens, a beam splitter, and a photodiode. The optical pickup 11 irradiates the optical disk rotated by the spindle motor 14 with light of a specific wavelength and detects the reflected light. And output to the RF IC 12. The data reading position of the optical pickup 11 (and the switching of the specific wavelength when dealing with a plurality of types of optical discs) is controlled from the CPU 17 via the DSP 18 in accordance with the target data requested for transmission. . This control may be further performed via the RF IC 12.

  The RF IC 12 detects a signal of data recorded on the optical disk by unevenness or the like from the reflected light acquired by the optical pickup 11 and outputs the data signal to the DSP 18. Each of the above-described constituent elements 11 to 14 (and the DSP 18 that controls the constituent elements) is an example of the configuration of an optical disk drive (optical drive).

  The DSP 18 performs various signal processing such as noise processing and correction according to the data reading position on the data signal read out from the optical pickup 11 in this manner, and temporarily records the data signal in the RAM 16. Thus, the RAM 16 is an example of a volatile memory for temporarily recording (storing) data read from the optical disc via the optical pickup 11. Due to the presence of the RAM 16, DMA (Direct Memory Access) transfer can be performed in the transfer between the optical disk, the optical disk drive control device 10, and the host device 20.

  The data read to the RAM 16 is transmitted to the host device 20 in a timely manner through the DSP 18 and the ATA I / F 19 under the control of the CPU 17. In this way, the data subjected to the transmission request from the host device 20 is read from the optical disk, temporarily recorded in the RAM 16, and transmitted to the host device 20, whereby the above-described transmission processing can be executed.

  As described above, the optical disk drive control apparatus 10 can read data recorded on the optical disk, and the control unit for controlling the data is exemplified by the CPU 17 and the DSP 18. Further, the optical disk drive control apparatus 10 preferably controls the writing of data to the optical disk, that is, corresponds to a rewritable optical disk, although details thereof will not be described. In the case of writing support, the RAM 16 temporarily records not only data read from the optical disc but also data written by the optical pickup 11 on the optical disc.

  As one of the main features of the present invention, the optical disk drive control device 10 includes a nonvolatile memory (hereinafter, exemplified by the flash memory 15). The flash memory 15 is a memory for recording a copy (copy data) of data recorded on the optical disc, and is deferred in the apparatus 10. Execution of processing for recording data on the optical disk in the flash memory 15 (hereinafter referred to as copy processing) is controlled by a control unit such as the CPU 17. The CPU 17 stores, for example, a copy processing program for controlling the copy processing in the internal ROM of the CPU 17 so as to be executable, and receives a request for starting the copy processing (hereinafter referred to as a copy request). By reading the copy processing program into the internal RAM and executing it, it is possible to control the execution of the copy processing.

  Such copy processing is based on the control by the control unit such as the CPU 17, and after first recording data to be copied on the RAM 16 in the same manner as the transmission processing described above, the data on the RAM 16 is stored in the flash memory 15. It can be executed by moving and recording. Such an execution method is one method of copy processing in the present invention. That is, the copy process includes a process of reading data from the optical disc by the optical pickup 11, temporarily recording the read data in the RAM 16, and moving the data from the RAM 16 to the flash memory 15 as one of the processing methods.

  The CPU 17 requests execution of copy processing until copying of data recorded on the optical disk to the flash memory 15 is completed. This copy request may be started by detecting that the optical disk is mounted, but may be started when the user gives an instruction by an operation at an arbitrary timing and detects the instruction. The completion of copying may refer to the completion of copying only data in a predetermined area. In other words, the target of the copy process may be determined based on conditions predetermined by the CPU 17. An optical disk has an area in which information for managing data in the optical disk is recorded. For example, a copy of data in this area may not be included in the copy process. As another example, the optical disk has a ROM area and a RE / RW area, such as a multilayer structure in which a ROM layer and a RE / RW layer are formed, and a ROM area in the same layer is distinguished from the RE / RW area. In the case of a hybrid disk, only the data in the ROM area may be subject to copy processing.

  As described above, the optical disc drive control apparatus 10 is configured to be able to execute a copy process. Depending on the progress of the copy process, there are many cases where data requested for transmission has already been copied. In addition, since the optical disk drive control device 10 executes the copy process until the data recorded on the optical disk is copied to the flash memory 15, it is shown to the user as a complete and removable virtual hard disk at the time of completion. be able to.

  Therefore, in the transmission process described above, in the present invention, the data in the flash memory 15 is preferentially read out to the RAM 16 over the data in the optical disc, and the data to be transmitted is transmitted to the request source. That is, when receiving a transmission request, the CPU 17 searches the flash memory 15 and the optical disc in the order of the data requested for the transmission, reads it into the RAM 16, temporarily records it, and transmits it to the request source. Control. In addition, the RAM 16 temporarily records the data recorded in the flash memory 15 when the data is transmitted to the host device 20 as described above.

  Here, the above search is performed by associating the addresses already copied to the flash memory 15 and the addresses on the optical disk that is the copy source, storing them in the flash memory 15, and those addresses and the address specified at the time of the transmission request. This can be done by comparing In some cases, different optical disks are mounted and read.

  Therefore, the CPU 17 records in the flash memory 15 the disc specifying information for specifying the optical disc on which the copy process has been performed and the copied information indicating the copied area such as the address described above when executing the copy process. Good. The disc identification information may be overwritten only when information different from the recorded disc identification information is obtained from the optical disc, and when overwritten, the copied information and the copy data itself may be deleted. As an alternative, when the optical disc is unmounted, the disc identification information, the copied information, and the copy data itself may be deleted.

  Based on such disc identification information and copied information, not only data can be read from the flash memory 15 in response to a transmission request, but also based on the above-described determination of completion of copying, determination of uncopied area, and determination result thereof. It is also possible to determine the position of the copy request (the position of the optical pickup 11 that starts the copy process).

  As one of the main features of the present invention, when the CPU 17 is requested to execute the copy process and the transmission process at the same time (any request may be first), the CPU 17 performs the transmission process from the copy process. Control to execute with priority.

  As described above, since the optical disk drive control device 10 according to the present invention executes the read process (that is, the transmission process) with priority over the copy process, it results from both the copy process and the transmission process. Access to the optical disc can be performed smoothly without the user having to consciously operate. Further, in the process of reading data from the optical disk, the most time-consuming is the movement of the optical pickup 11 and its control. However, in the optical disk drive control device 10 according to the present invention, a non-volatile memory such as the flash memory 15 that can be read at high speed is used together, and the copy process is performed until the data copy is completed in the non-volatile memory. In some cases, data that has already been copied to a non-volatile memory has increased, and as a result, the optical pickup can be prevented from moving frequently by suppressing the frequency of reading from the optical disk, and smooth data reading can be realized. . Also, data reading can be completed at high speed because reading from the internal nonvolatile memory is much faster. Further, since the optical pickup does not move frequently, the present invention can contribute to power saving.

  2 is a flowchart for explaining an example of processing in the optical disk drive control device of FIG. 1, FIG. 3 is a flowchart for explaining an example of copy processing in FIG. 2, and FIG. 4 is a transmission processing in FIG. It is a flowchart for demonstrating an example.

  An example of processing when the CPU 17 receives a transmission request during copy processing will be described with reference to FIG. For example, when the optical disk is mounted, the CPU 17 determines the start of the copy process, passes the copy request to the copy process program, reads the data on the optical disk in sequence to the RAM 16 by executing the copy process program, and flushes it after the process in the DSP 18. Recording is performed in the memory 15 (step S1).

  When the CPU 17 receives a transmission request (that is, a data read request as an external action) from the host device 20 before the copying is completed (step S2), the CPU 17 instructs the copy processing program to stop the copy processing. The process of S1 is ended, and the transmission processing program is instructed to start data reading. In response to this instruction, the transmission processing program is executed, and the data on the optical disc is sequentially read into the RAM 16 and passed to the host device 20 that is the transmission request source after processing by the DSP 18 (step S3). In step S3, if there is data necessary for transmission in the flash memory 15, the data in the flash memory 15 is given priority to the host device 20. In this case, it is only necessary to use the RAM 16 by dividing the use area without giving an instruction to stop the copy process. In the following description, processing by the DSP 18 is omitted for simplification.

  When data is transmitted in advance to the read end address included in the transmission request (step S4), the copy processing program is notified of the read start / end address (step S5) and the transmission processing program itself is terminated. When a processing method is adopted in which the read end address is not included in the transmission request, the data read end in step S4 is received by the CPU 17 from the host device 20, and the read address is read. What is necessary is just to notify in step S5 with a read start address as an address.

  The copy process in step S6 employs a method of reducing the movement of the position of the optical pickup 11. As a suitable example for reducing the movement of such a position, a process for preventing the data in the RAM 16 from being discarded as much as possible can be applied. More specifically, when the copy request and the transmission request are requested at the same time, the CPU 17 temporarily records the data read from the optical pickup 11 from the optical disc by executing the transmission process and transmits the data to the RAM 16. Then, control is performed so that the data in the RAM 16 is retained after the transmission. Note that when the copy request and the transmission request are requested at the same time, either the copy request or the transmission request may be accepted first (the same applies hereinafter).

  Then, when the transmission process is completed, the CPU 17 controls to perform a process of moving the data in the RAM 16 that has been transmitted in the transmission process to the flash memory 15 as a copy process. At this time, the read start / end address information is also recorded as copied information. Since only the data in the RAM 16 is moved to the flash memory 15, there is no need to move the optical pickup 11.

  In this way, when the transmission process is completed, the transmitted data is copied to the flash memory 15 as it is, so that the user tries to access the data from the host device 20 as needed, and the user tries to access it even once. Since all data is recorded in the flash memory 15, copying to the flash memory 15 can be completed without the user's knowledge.

  In addition, after all the data in the RAM 16 (copy data of data on the optical disk) has been recorded in the flash memory 15 in step S6, the copy process is continued. At this time, the copy process may be resumed from the position of the optical pickup 11 at the end of the transmission process in step S3, and the CPU 17 is instructed to read from the notified read end address and copy to the flash memory 15. That's fine. Instead of continuously executing, a process may be employed in which the copy process is interrupted when data in the RAM 16 is recorded.

  In this example, it is assumed that the transmission request is made in a range not exceeding the capacity of the RAM 16. Therefore, when a transmission request exceeding that in the host device 20 is necessary, it is preferable that the host device 20 makes a transmission request separately. However, it is allowed to exceed the capacity, and the data copy processing in the RAM 16 is somewhat necessary. The transmission request may be divided on the CPU 17 side at the expense of the response time.

  As another processing method for allowing the transmission request to exceed the capacity of the RAM 16, the data in the RAM 16 is discarded at an appropriate time, the transmission to the request source is continued, and only the data in the RAM 16 at the time when the transmission is completed. A method of holding can also be adopted.

  More specifically, the CPU 17 is requested to execute the copy process and the transmission process at the same time, and when the transmission process is being performed, the transmission process is performed when the remaining recordable amount of the RAM 16 is exhausted. May be controlled by moving the data in the RAM 16 that has been transmitted in the transmission process to the flash memory 15 and executing the copy process first. The host device 20 may be configured not to return a response such as “accept next data” until the CPU discards the capacity when the capacity of the RAM 16 becomes full, for example. Then, the CPU 17 may perform control so that the transmission process is resumed when the remaining recordable amount of the RAM 16 is restored (or until the RAM 16 is empty with the copied information and the disk specifying information remaining empty). .

  In this method, although the data in the RAM 16 after transmission is recorded in the flash memory 15, the above-mentioned “some response time required for the copy process” is not sacrificed. The case where the remaining recordable amount of the RAM 16 has been described has been described. Similarly, when the transmission request is canceled after the simultaneous request, the transmission is interrupted and the data at the time of the cancellation is retained, and the flash memory 15 is retained. Can be recorded.

  If a transmission request is received again during the copy process in step S6 (step S7), the same process as in steps S3 to S6 may be repeated (steps S8 to S11). Then, the copy processing program may be terminated when the copy processing is completed.

  An example of a copy process that enables the process shown in FIG. 2 will be described with reference to FIG. In the copy process, the CPU 17 first determines whether or not the designated address included in the copy request has been copied based on the copied information in the flash memory 15 (step S21). The data is read from the RAM 16 to the RAM 16 (step S22), and is written to the designated address of the flash memory 15 (which may also be included in the copy request) (step S23). As a result, the data in the optical disk is copied to the flash memory 15.

  Then, the CPU 17 determines whether or not copying of all the data that is the target of the copy request has been completed (step S24). On the other hand, if it has not been completed, the read start / end address notified from the transmission process (that is, the data read process other than the copy process) is confirmed (step S25). In step S25, if there is a notification address after confirmation, it is designated as the next copy target designated address. If there is no notification address, the next designated address included in the first copy request is used as the next copy target as it is. To the specified address.

  With reference to FIG. 4, an example of a transmission process that enables the process shown in FIG. 2 (particularly, the processes in steps S3 to S5) will be described. The transmission process is started when the CPU 17 receives a transmission request. The CPU 17 determines whether or not the data at the address specified by this transmission request has been copied based on the copied information in the flash memory 15 (step S31). If copied, the CPU 17 reads the data from the flash memory 15 to the RAM 16 and transmits it to the host device 20 (step S32), and notifies the copy processing program of the final read address (and read start address) (step S33). ), The process is terminated. On the other hand, if it has not been copied, the CPU 17 stops the copy process (step S34), reads the data at the address specified by the transmission request from the optical disk to the RAM 16, and transmits it to the host device 20 (step S35). Exit.

  Next, the relationship between the read position on the optical disk and the copied area of the flash memory when the transmission process and the copy process are executed in the optical disk drive control apparatus of FIG. 1 will be described with reference to FIGS. To do. Here, it is assumed that the transmission process based on the transmission request is task A and the copy process based on the copy request is task B, and the tasks A and B are simultaneously requested as described above. Tasks A and B have priority, and in this case, task A> task B.

  As shown in FIG. 5, it is assumed that the data read by the task A is from the middle of the optical disk area 40 and the data designated by the task B to be read is the head of the optical disk area 40. In this case, the task A is prioritized, the position of the optical pickup is moved to the data start position P1 requested by the task A, and the data (colored area in FIG. 5) is read from the optical disk to the RAM 16 to be the host device. 20 is transmitted. At this time, the data read into the RAM 16 is conventionally discarded after transmission, but before being discarded, it is used as the copy data for the task B and recorded in the area 30 in the flash memory 15 as shown in FIG. . In order to make it easy to understand in the area 30, the position of the copied area is matched with the colored area in FIG. 5, but it is only necessary to associate the actual addresses with each other even if they do not correspond to each other.

  Next, when task A has a margin (for example, when there is no remaining recordable amount in RAM 16 or when task A is stopped or paused), task B is processed. At this time, the position of the optical pickup 11 is moved (moved to the position P2) to the read position (in this example, the start position of the optical disk) requested by the task B first, and the data is read and copied to the flash memory 15. .

  Next, when task A continues to make a data read request, if that data has already been copied to the area 30 in the flash memory 15 as shown in FIG. Transmit to the device 20. As a result, disk access is not required for copied data, and the movement request of the optical pickup 11 can be reduced. As a result, reading of task A (data reading often requiring real-time performance) is hindered. Therefore, the task B copy process can be continuously executed. In the copy process executed here, as shown in FIG. 7, the optical pickup 11 is moved to the position P3 in the optical disk area 40 corresponding to the start point of the area following the copied area in the flash memory 15 area 30. Can be executed.

  In this way, when an optical disc transmission request and a copy request are made at the same time, the data accessed according to the transmission request is copied at the same time, and if the same location is accessed, the copy destination is accessed. Can reduce access to the copy source. This prevents the optical pickup 11 from moving frequently. That is, smooth data reading can be realized by changing the position of the optical pickup 11 as much as possible when reading the optical disk.

  Further, it is assumed that the CPU 17 itself performs such control (task control) of copy processing and transmission processing independently of the host device 20 when receiving a transmission request from the host device 20. Such task control may be performed by the OS of the host device 20 connected to the optical disk drive control device 10 and instructed to the CPU 17. The same applies to the control in the example described below.

  FIG. 8 is a diagram for explaining the reading position on the optical disc when the copy processing is executed after the transmission processing in the optical disc drive control apparatus of FIG. In the example of FIG. 6, after copying the transmitted data, the position of the optical pickup 11 is moved to the read position P <b> 2 requested by the task B first, and the data copy to the flash memory 15 is continued. As shown in FIG. 8, the copying process at the time of continuation preferably starts the position of the optical pickup 11 from a position P4 where the transmission is completed.

  More specifically, the CPU 17 moves the data in the RAM 16 that has been transmitted by the transmission process to the flash memory 15 after the transmission process is completed as a copy process, and then reads the optical pickup 11 that has been read from the optical disk by the transmission process. Control is performed so that data is read from the optical disk to the RAM 16 and recorded temporarily, with the position corresponding to the uncopied data closest to that position as the start point (position P4 in FIG. 8). The position of the optical pickup 11 here corresponds to the notification address in step S5 of FIG. 2, and can be obtained from the notification address. Further, the CPU 17 controls to move the data to the flash memory 15. As described above, when the processing is switched from the task A to the task B, the movement of the optical pickup 11 can be further reduced by starting from the position of the optical pickup 11 or the nearest uncopied position. Also in this process, the above-described process related to the interruption of the transmission process can be applied.

  Further, when performing such control, the CPU 17 starts the copy process from the above starting point, the position of the optical pickup 11 that has been read from the optical disk by the transmission process (position P4 in FIG. 8), and the copy process. Control may be performed only when the scheduled pickup position (position P2 in FIG. 6) indicated by the request to execute is separated by a predetermined distance or more. On the other hand, if they are not separated from each other, it may be controlled to start the copy process from the scheduled position. In this way, when the process is switched from task A to task B, if the position of the optical pickup 11 is greatly different, copying of the task B continues from the current position of the optical pickup 11 so that the copied data is stored on the optical disk. Can be prevented from becoming worm-eaten.

  Further, as an example of processing that does not discard the data in the RAM 16, an example has been described in which only the data in the RAM 16 after the transmission processing is considered. However, the data in the RAM 16 after the copy processing is not discarded as much as possible. Thus, the data immediately after the copy processing can be read out from the RAM 16 according to the transmission request.

  More specifically, the flash memory 15 stores data temporarily recorded in the RAM 16 as a copy process (unless the remaining recordable capacity of the RAM 16 is exhausted or the capacity used in the transmission process is exhausted). Instead of moving to, it is better to adopt a process of copying. Copying instead of moving means keeping the data in the RAM 16.

  Then, when the CPU 17 receives a transmission request as a transmission process, the CPU 17 may search the data targeted for the transmission request in the order of the RAM 16, the flash memory 15, and the optical disk. As a result of the search, if it is in the RAM 16, it is transmitted from the RAM 16 to the request source. And temporarily recording the data and transmitting the data from the RAM 16 to the request source. That is, in this transmission process, data temporarily recorded in the RAM 16 during the copy process is preferentially read from the data recorded in the flash memory 15 by the copy process, and data transmission is performed.

  The processing in the case where the CPU 17 receives a transmission request during the copy processing has been described above with reference to FIGS. 2 to 8. However, if a copy request occurs during the transmission processing, the copy processing waits. All you have to do is leave it.

  Next, another example for reducing the movement of the position of the optical pickup 11 will be described. As such an example, a process in which the transmission process is prioritized over the copy process can be applied even when the data in the RAM 16 after the transmission is always discarded. This example is a modification in which the data in the RAM 16 after transmission is always discarded in the example described with reference to FIG.

  More specifically, when the CPU 17 temporarily records the data read from the optical pickup 11 from the optical disk 11 by the execution of the transmission process and transmits the data in the RAM 16 in a state where the copy request and the transmission request are simultaneously requested, Control is performed to discard the data in the RAM 16 after transmission. Further, when the transmission process is completed, the CPU 17 determines the position corresponding to the uncopied data closest to the position (position P4 in FIG. 8) of the optical pickup 11 that has been read from the optical disk in the transmission process. As a starting point, control is performed so that data is read from the optical disk to the RAM 16 and temporarily recorded, and the data is moved to the flash memory 15. In such control, since the transmitted data is discarded from the RAM 16, it is not necessary to consider the amount of data requested for transmission and the capacity of the RAM 16.

  In such control as well, the data temporarily recorded in the RAM 16 is retained as a copy process, and the data requested for transmission is transmitted in the order of the RAM 16, the flash memory 15, and the optical disk as a transmission process. An example of adopting a search process can be applied. Also in such control, as described in FIG. 8, the CPU 17 starts the copy process from the start point, the position of the optical pickup 11 that has been read from the optical disk by the transmission process, and the execution of the copy process. Control may be performed only when the predetermined position of the pickup indicated by the request is separated by a predetermined distance or more, and when it is not separated, control may be performed to start the copy process from the predetermined position. .

  Further, although an example in which data in the RAM 16 after transmission is always discarded is shown, it is discarded only when the recordable remaining amount of the RAM 16 falls below a predetermined amount (for example, when the recordable remaining amount runs out). It may be.

  More specifically, when the CPU 17 temporarily records the data read from the optical pickup 11 from the optical disk 11 by the execution of the transmission process and transmits the data in the RAM 16 in a state where the copy request and the transmission request are simultaneously requested, When the recordable remaining amount in the RAM 16 does not fall below the predetermined amount after transmission, the processing described in step S6 in FIG. 2 may be executed. That is, in such a case, when the recordable remaining amount of the RAM 16 does not fall below a predetermined amount after transmission, the CPU 17 controls to retain the data in the RAM 16 after transmission. Then, when the transmission process is completed, the CPU 17 may control to perform a process of copying the data in the RAM 16 that has been transmitted in the transmission process to the flash memory 15 as the copy process. Further, in the transmission process, an example in which a process for retrieving the data requested for the transmission request in the order of the RAM 16, the flash memory 15, and the optical disc can be applied.

  Since the copy process is a process of copying data in the RAM 16 instead of moving, the remaining recordable amount may be insufficient. Therefore, when the recordable remaining amount of the RAM 16 falls below a predetermined amount after transmission, the CPU 17 controls to discard the data in the RAM 16. When such discarding is executed, when the transmission process is completed, the CPU 17 is closest to the position (position P4 in FIG. 8) of the optical pickup 11 that has been read from the optical disk by the transmission process or the position. Starting from a position corresponding to uncopied data, data is read from the optical disk to the RAM 16 and temporarily recorded, and control is performed so that the data is moved or copied to the flash memory 15.

  Also in the control for changing the processing depending on whether or not the recordable remaining amount is in the RAM 16 as described above, the CPU 17 transmits the start from the start point of the copy process as in the description of FIG. When control is performed so that the position of the optical pickup 11 that has been read from the optical disk in the process and the planned position of the pickup indicated by the request to execute the copy process are separated by a predetermined distance or more, and is not separated Alternatively, the copy process may be controlled to start from the scheduled position.

  Next, data recorded on the optical disc will be described. By including an operating system (OS) program to be executed by the request source (that is, the host device 20) as data recorded on the optical disc, the host device 20 can be activated from the optical disc. When the host device 20 is a PC or its main board and a BD is used as an optical disc, the OS program may be recorded in the UDF format. An optical disc on which an OS program is recorded (that is, a bootable optical disc) is very useful in terms of security, for example, when it is desired to switch the OS according to the purpose of a thin client PC. At the same time, a special key can be embedded in the optical disc so that data other than the OS cannot be copied from the optical disc.

  Further, when the OS is recorded on the optical disc, it is preferable to have a multilayer structure as exemplified below. First, the L0 layer (first layer) is a BD-RE, provided with a storage area for user data such as application software running on the OS and its data, and management data for managing the storage area. An area for storing (for example, the address of data in the storage area) is also provided. The L1 layer (second layer) is also a BD-RE, and stores the OS boot partition data including the OS. The L2 layer (third layer) is a BD-ROM, and stores an OS original image, management information necessary for disc recognition, and the like. Then, other than the hybrid drive with the flash memory 15 such as the optical disk drive control device of the present invention, for example, the L2 layer (third layer) may be made invisible. Thereby, it is possible to prevent the original from being copied by a device other than the device of the present invention. In this example, original data (shipment data) is recorded on the second layer of the optical disc, and data in a state where the user has added an application is stored on the first layer. Whether the user reads various data from the second layer at the time of use or whether the user reads the data arbitrarily (first layer + second layer) may be made selectable by the user at the start of use.

  Of course, the data recorded on the optical disk may be a video / audio file, an audio file, a document file, etc., but a file that is accessed for reproduction and opening many times is recorded on the optical disk. Thus, the effect of the present invention can be further obtained. For example, in the case of an optical disc in which a pre-edited shooting file is recorded, if the optical disc drive control device 10 is set to be writable, it can be edited on the flash memory 15 and returned to the optical disc again.

  As described above, the present invention has been described on the assumption that the present invention includes a nonvolatile memory such as the flash memory 15, but a volatile memory having the same capacity is applied instead of the nonvolatile memory. You can also If the optical disk drive control device 10 is refreshed until the power is turned off, the copy data disappears every time the power is turned off, but the same effect can be obtained only until the power is turned off. For example, it is useful when using such a method for security in a thin client PC.

  A more preferable configuration example of such a mode in which the volatile memory is mounted will be described with reference to FIG. FIG. 9 is a diagram showing a configuration example of a data management apparatus according to another embodiment of the present invention. In FIG. 9, 10a is an optical disk drive control apparatus, and 20 is a host device.

  FIG. 1 shows an example in which a non-volatile memory such as the flash memory 15 is mounted on the optical disk drive control device 10, but the optical disk drive control device 10a in FIG. 9 is exemplified by a volatile memory (RAM 15a) instead of the non-volatile memory. ). The optical disk drive control device 10a is equipped with a battery 15b for supplying power to the RAM 15a. As a result, since the power can be supplied from the battery 15b even when the external power supply is interrupted, the copy data can be held as long as the power of the battery 15b continues.

  FIG. 10 is a diagram showing a configuration example of an optical disk drive control device according to another embodiment of the present invention, in which 60 is an optical disk drive control device, 50 is an optical drive, and 20 is a host device. In FIG. 1, an example in which the optical disk drive control device 10 is provided with an optical drive has been described. However, the optical disk drive control device 60 in FIG. 10 is configured so that the optical drive 50 can be externally connected.

  The optical drive 50 may be configured by the optical pickup 11, the RF IC 12, the motor driver 13, and the spindle motor 14 as described in the configuration example of FIG. 1. The optical disk drive control device 60 includes an ATAPI I / F 61 in order to perform control and data exchange with the RF IC 12 and the motor driver 13. The ATAPI I / F 61 is an example of an interface for connecting to the optical drive 50.

  The optical disk drive control device 60 includes the flash memory 15, the RAM 16, the CPU 17, the DSP 18, and the ATA I / F 19 similarly to the configuration example of FIG. 1, and the configuration example of FIG. 1 (and FIGS. 2 to 8). Processing similar to the processing described can be executed. That is, in the optical disk drive control device 60, as in the configuration example of FIG. 1, access to the optical disk caused by both the copy process and the transmission process can be smoothly performed without the user having to refrain from performing the operation. It becomes possible. Furthermore, the configuration example of FIG. 10 is very useful because a conventional optical drive can be applied as the optical drive 50 that can be connected via the ATAPI I / F 61 and is versatile. In the configuration example of FIG. 10, a configuration in which a volatile memory is mounted instead of the flash memory 15, or a configuration in which a battery 15b as shown in FIG.

  In any of the configuration examples of FIGS. 1, 9, and 10, there is no mention of intentionally reading data directly from the disk. However, the various types of optical disk drive control devices described above do not directly read data from the disk. It may be configured such that control for reading out can also be executed. In this case, not only the ATA I / F 19 but also an ATAPI I / F for connecting to the host device 20, for example, is provided, and when the host device 20 reads the data directly from the disk, the host device 20 passes through the ATAPI I / F. A transmission request may be issued.

  Finally, a supplementary description will be given with reference to FIGS. 11 to 13 regarding the data reading order when the above-described optical disc has a multilayer structure. FIG. 11 is a diagram for explaining the data reading order in the multilayer BD, FIG. 12 is a diagram for explaining the data reading order in the multilayer hybrid BD, and FIG. 13 is the data reading in the multilayer hybrid BD. It is a figure for demonstrating an order.

  The optical disk illustrated in FIG. 11 is a BD having a two-layer structure, and each layer has the same recording form (any one of ROM / RE / RW, etc.). In this case, the optical pickup 11 reads from the inner peripheral portion (address 0x0 in this example) in the first layer 71 in order to the outer peripheral portion (0x10000) in the outer peripheral direction, and then returns to the outer peripheral portion (same as the second layer 72). From 0x10001) toward the inner circumference (from 0x20000) to the inner circumference. The method of turning back at layer switching is called “opposite”, while the method of returning to the inner periphery is called “parallel”. In the case of DVD, both the opposite method and the parallel method are adopted. However, the opposite type is adopted for the recordable DVD.

  Further, since the address of the optical disk depends on the reading method, in the case of the opposite method as shown in FIG. 11, the second layer 72 starts from the outer periphery (an example of the address is as described above). In the case of the parallel system, the second layer returns to the inner periphery and the address is counted up. For accessing the optical disk, an address (address number) and a read size are used.

  The optical disk illustrated in FIG. 12 is a BD having a three-layer structure, where the first layer 81 and the second layer 82 are the RE layer, and the third layer 83 is the ROM layer. In this case, the optical pickup 11 reads the first layer 81 sequentially from the inner periphery to the outer periphery toward the outer periphery, and the second layer 82 folds back and reads from the outer periphery to the inner periphery toward the inner periphery. In the third layer 83, it moves again so as to read back in the same direction as the first layer. The optical disk illustrated in FIG. 13 is a BD having a two-layer structure, in which one layer 91 is an RE layer and two layers 92 are ROM layers. In this case, the optical pickup 11 reads from the inner peripheral portion to the outer peripheral portion in order from the inner peripheral portion in the first layer 91 to the outer peripheral portion in the second layer 92 and returns to the inner peripheral portion from the inner peripheral portion to the outer peripheral portion in the outer peripheral direction. Move to read.

  As described above, the optical discs of FIGS. 12 and 13 are examples in which the system is restarted from the inner periphery when the layer is changed to a different type, and the same type layer is defined as an opposite method. Also, the address of the optical disk as shown in FIGS. 12 and 13 can be determined depending on the reading method of the optical disk, and is managed by the determined address, as described with reference to FIG. Note that the addresses may be added in order from 0 in the reading order regardless of the layer switching. If the addresses are assigned from 0 in the ROM layer and the RE layer, the disk cannot be accessed with a standard ATAPI command, so the command needs to be changed.

  Not only the reading order described with reference to FIGS. 11 to 13 but also a command dedicated to access to the optical disk used in the present invention, for example, a hybrid BD, a command dedicated to access to the hybrid BD is newly provided. Also good. By determining this command, an address can be set, and data can be read based on the address.

It is a figure which shows the example of 1 structure of the optical disk drive control apparatus which concerns on one Embodiment of this invention. It is a flowchart for demonstrating the process example in the optical disk drive control apparatus of FIG. FIG. 3 is a flowchart for explaining an example of copy processing in FIG. 2. FIG. 3 is a flowchart for explaining an example of transmission processing in FIG. 2. FIG. 2 is a diagram for explaining a relationship between a read position on an optical disc and a copied area of a flash memory when transmission processing and copy processing are executed in the optical disc drive control apparatus of FIG. 1. FIG. 2 is a diagram for explaining a relationship between a read position on an optical disc and a copied area of a flash memory when transmission processing and copy processing are executed in the optical disc drive control apparatus of FIG. 1. FIG. 2 is a diagram for explaining a relationship between a read position on an optical disc and a copied area of a flash memory when transmission processing and copy processing are executed in the optical disc drive control apparatus of FIG. 1. FIG. 3 is a diagram for explaining a read position on an optical disc when a copy process is executed after a transmission process in the optical disc drive control apparatus of FIG. 1. It is a figure which shows the example of 1 structure of the optical disk drive control apparatus which concerns on other embodiment of this invention. It is a figure which shows the example of 1 structure of the optical disk drive control apparatus which concerns on other embodiment of this invention. It is a figure for demonstrating the data reading order in multilayer BD. It is a figure for demonstrating the data read-out order in a multilayer hybrid type BD. It is a figure for demonstrating the data read-out order in a multilayer hybrid type BD.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,60 ... Optical disk drive control apparatus, 11 ... Optical pick-up, 12 ... RF IC, 13 ... Motor driver, 14 ... Spindle motor, 15 ... Flash memory, 16 ... RAM, 17 ... CPU, 18 ... DSP, 20 ... Host apparatus 50 ... Optical drive.

Claims (7)

An optical disk drive control device for controlling reading of data recorded on a portable optical disk,
A memory for recording a copy of the data recorded on the optical disc;
A volatile memory for temporarily recording data read from the optical disc via an optical pickup;
(A) Execution of a copy process for recording data on the optical disk in the memory; and (b) a request source for data subject to the transmission request when receiving a transmission request for data recorded on the optical disk. A control unit that controls execution of transmission processing to be transmitted to
The copy process includes a process of reading data from the optical disc by the optical pickup, temporarily recording the read data in the volatile memory, and moving the data from the volatile memory to the memory;
In the transmission process, when a transmission request for data recorded on the optical disc is received, the data subject to the transmission request is retrieved in the order of the memory and the optical disc and read to the volatile memory. As a process of temporarily recording and transmitting to the request source,
The control unit requests execution of the copy process until copying of data recorded on the optical disc to the memory is completed; and
When the execution of the copy process and the execution of the transmission process are requested at the same time,
(I) Control to execute the transmission process with priority over the copy process ,
(II) When the data read from the optical pickup from the optical pickup by the execution of the transmission process is temporarily recorded in the volatile memory and transmitted, control is performed so that the data in the volatile memory is retained after the transmission. And when the transmission process is completed, as the copy process, control is performed so as to perform the process of moving the data in the volatile memory that has been transmitted in the transmission process to the memory,
(III) When the transmission process is being executed, when there is no recordable remaining amount in the volatile memory, the transmission process is interrupted, and the data in the volatile memory that has been transmitted in the transmission process The optical disc drive is controlled to execute the copy process by moving the memory to the memory, and to resume the transmission process when the remaining recordable amount of the volatile memory is restored to a predetermined amount Control device. The control unit, as the copy process, moves the data in the volatile memory that has been transmitted in the transmission process after the transmission process is completed to the memory, and then reads the data from the optical disc in the transmission process. Starting from the position of the optical pickup or the position corresponding to the uncopied data closest to the position, the data is read from the optical disk to the volatile memory, temporarily recorded, and the data is moved to the memory The optical disk drive control device according to claim 1 , wherein the optical disk drive control device is controlled. The control unit determines the start of the copy process from the start point, the position of the optical pickup that has been read from the optical disc in the transmission process, and the planned position of the pickup indicated by the request to execute the copy process. 3. The optical disc according to claim 2 , wherein control is performed so as to be executed only when the distance is greater than a predetermined distance, and control is performed so that the copy process is started from the predetermined position when the distance is not greater than the predetermined distance. Drive control device. The request for execution of the copy processing, the optical disc optical disc driving control device according to any one of claims 1 to 3, characterized in that made upon receiving the or a predetermined user operation when being mounted . Optical disk drive controller according to any one of claims 1-4, characterized in that it comprises an optical disk drive device provided with a device and the optical pickup rotating the optical disc. The optical disc drive device provided with a device and the optical pickup rotating the optical disc, the optical disc drive control apparatus according to any one of claims 1 to 4, characterized in that with a connection interface for connecting. As the data recorded on the optical disk, an optical disk drive controller according to any one of claims 1 to 6, characterized in that it comprises an operating system program for executing by the requestor.

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