JP2011150753A - Recording device, recording method, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device performing write-in in power saving. <P>SOLUTION: A hybrid drive device 1 is equipped with a flash memory 14 requiring a smaller power for recording than that of an optical disk. The hybrid device 1 is equipped with: an instruction executing part 12 writing data obtained from a host device into the flash memory 14; and a drive control part 15 writing data recorded in the flash memory 14 by the instruction executing part 12 into the optical disk in a short period of time. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a recording apparatus, a recording method, and a reproducing method for recording data on a recording medium such as an optical disk.

The increased environmental awareness and de-CO ₂ consciousness, power saving is becoming more added value in appliances. An optical disk drive device built in various AV devices such as an optical disk player, an optical disk recorder, and a television receiver is no exception.

  However, in the optical disk drive device, when writing data on the optical disk or reading data recorded on the optical disk, it is necessary to continue to rotate the optical disk by the spindle motor. The spindle motor is usually connected to a 12V power source and driven by a current of about 1.2 to 2.4 A. Therefore, at the time of reproduction and recording, power of at least about 1.2 to 2.4 W is consumed.

  In the optical disk drive device, processing with high instantaneous power consumption includes starting up a spindle motor, long-distance seek, laser driving (during recording), and the like. However, since these processes have a short execution time, the process of driving the optical disk by the spindle motor described above is representative as a process having a large average power consumption. Therefore, in order to reduce the power consumption of the optical disk drive, it is important to reduce the power consumption required for rotational driving of the spindle motor.

  Patent Document 1 discloses an optical disc drive in which power consumption is reduced by reducing the rotational speed of the optical disc, such as formatting the optical disc.

JP 2006-40437 A (published February 9, 2006)

  However, the technique described in Patent Document 1 merely reduces power consumption when formatting an optical disc, and does not reduce power consumption during recording and reproduction. And since formatting is not a process performed frequently, the power saving achieved by the technique described in Patent Document 1 is only a small amount.

  The present invention has been made in view of the above problems, and an object of the present invention is to realize an optical disc drive apparatus capable of reducing power consumption required for writing data on an optical disc.

  In order to solve the above-described problem, a recording apparatus according to the present invention includes a first recording unit that records data acquired in a first period on a recording medium that requires less power than an optical disc, and the first recording unit. And a second recording means for recording the data recorded on the recording medium on the optical disc in a second period shorter than the first period.

  In order to solve the above-described problem, the recording method according to the present invention includes a first recording step of recording data acquired in the first period on a recording medium whose power required for recording is smaller than that of the optical disc, and the first And a second recording step of recording data recorded on the recording medium in the recording step on the optical disc in a second period shorter than the first period.

  According to the above configuration, the period for rotating the optical disc can be shortened from the first period to the second period (shorter than the first period). For this reason, the electric power for rotating an optical disk can be reduced. Moreover, the recording medium used for shortening the period for rotating the optical disk is a recording medium that requires less power for recording than the optical disk. For this reason, the power consumed by the recording apparatus can be reduced as a whole.

  In the recording apparatus according to the present invention, it is preferable that the second recording unit stops or decelerates the rotation of the optical disc in a period other than the second period.

  According to said structure, the electric power for rotating an optical disk can be reliably reduced in periods other than the said 2nd period.

  In the recording apparatus according to the present invention, the second recording means simultaneously records the data acquired in the first period on the recording medium, or stores the data acquired in the first period on the recording medium. It is preferable to start recording data recorded on the recording medium onto the optical disc before recording is completed.

  According to the above configuration, the period from the start of data acquisition to the completion of data recording on the optical disk can be suppressed to the sum of the first period and the second period at most.

  In the recording apparatus according to the present invention, it is preferable that the first recording unit compresses and records the data acquired in the first period on the recording medium.

  According to the above configuration, the data read from the first recording medium and recorded on the optical disc is compressed data. For this reason, the data size of the data read from the first recording medium and recorded on the optical disc is reduced. Therefore, the second period can be set even shorter, and the power for rotating the optical disk can be further reduced.

  Note that a program that causes a computer to operate as the recording apparatus and that causes the computer to function as each unit included in the recording apparatus also falls within the scope of the present invention. The same applies to a computer-readable recording medium on which such a program is recorded.

  As described above, the recording apparatus according to the present invention records the data acquired in the first period on the recording medium that records the data required for recording on the recording medium smaller than the optical disc, and the recording by the first recording unit. Second recording means for recording data recorded on the medium on the optical disc in a second period shorter than the first period.

  In addition, as described above, the recording method according to the present invention includes the first recording step of recording data acquired in the first period on a recording medium whose recording power is smaller than that of the optical disc, and the first recording step. And a second recording step of recording data recorded on the recording medium on the optical disc in a second period shorter than the first period.

  Accordingly, the power consumed by the recording apparatus can be reduced as a whole.

1 is a block diagram showing a configuration of a hybrid drive device according to an embodiment of the present invention. It is a block diagram which shows the structure of the optical disk drive part with which the hybrid drive apparatus shown in FIG. 1 is provided. FIG. 2 is a sequence diagram showing a flow of a write operation of the hybrid drive device shown in FIG. 1. 2 is a timing chart showing a flow of a write operation of the hybrid drive device shown in FIG. 1. (A) shows a first operation example, and (b) shows a second operation example. FIG. 2 is a sequence diagram showing a flow of a read operation of the hybrid drive device shown in FIG. 1. 2 is a timing chart showing timings at which an initial setting operation is performed in the hybrid drive device shown in FIG. 1. (A) shows a first operation example, (b) shows a second operation example, and (c) shows a third operation example.

[Embodiment 1]
A drive device according to an embodiment of the present invention will be described below with reference to the drawings.

  Note that the drive device according to the present embodiment is a drive device that uses a recording medium that consumes less power than the optical disk in addition to the optical disk, for example, a flash memory, as a recording medium. Is referred to as a hybrid drive device. Examples of the optical disk that can be used in the drive device according to the present embodiment include a BD (Blu-ray Disk), a DVD (Digital Versatile Disk), and a CD (Compact Disk). In addition to flash memory, HD (Hard Disk), SSD (Solid State Disk), and the like are available as recording media capable of recording data with less power consumption than optical disks. However, flash memory has the advantages of lower power consumption than HD and lower cost than SSD.

<Configuration of hybrid drive device>
First, the configuration of the hybrid drive device 1 will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of the hybrid drive device 1.

  As shown in FIG. 1, the hybrid drive device 1 includes an interface 11, an instruction execution unit 12, a DRAM (Dynamic Random Access Memory) 13, a flash memory 14, a drive control unit 15, and an optical disc drive unit 20.

  The interface 11 is a means for obtaining a command issued from the host device and data (data to be written to the optical disk) supplied from the host device. For example, ATA (Advanced Technology Attachment), ATAPI (ATA Packet Interface) or SATA (Serial ATA) interface. Examples of commands acquired by the interface 11 include a write command for writing data to the optical disc and a read command for reading data from the optical disc.

  The write command includes disk area designation information (for example, logical block address) for designating an area on the optical disk to which data is to be written, and size designation information for designating the data size of the data to be written. The read command includes disk area designation information that designates an area on the optical disk from which data is to be read, and size designation information that designates the data size of the data to be read.

  The instruction execution unit 12 is a means for controlling each unit of the hybrid drive device 1 in accordance with a command acquired via the interface 11, and can be configured using, for example, a CPU (Central Processing Unit). In this case, a program for causing the CPU to function as the instruction execution unit 12 may be recorded in the ROM built in the instruction execution unit 12 or the DRAM 13 or the flash memory 14 included in the hybrid drive device 1.

  For example, when a write command is acquired from the host device, the instruction execution unit 12 acquires data to be written to the optical disc (hereinafter also referred to as “target data”) from the host device via the interface 11 and acquires from the host device. The target data thus written is sequentially written into the flash memory 14. Desirably, the target data acquired from the host device is sequentially compressed and written to the flash memory 14.

  Further, the instruction execution unit 12 issues an activation request to the drive control unit 15 immediately before the writing of the target data to the flash memory 14 is completed. Further, the instruction execution unit 12 issues a write request to the drive control unit 15 at the same time as the writing of the target data to the flash memory 14 is completed, and the target data (preferably compressed target data) is sent from the flash memory 14. The target read out from the flash memory 14 is supplied to the drive control unit 15.

  The write request includes disk area designation information for designating an area on the optical disk to which the target data is to be written, as in the write command. The drive control unit 15 specifies an area on the optical disk in which the target data is to be written by referring to the disk area designation information.

  Further, when the instruction execution unit 12 acquires the write command, the instruction execution unit 12 associates the disk area designation information included in the write command with the memory area designation information for designating the area on the flash memory 14 to which the target data is written, and stores it in the DRAM 15. Register in the stored conversion table. This conversion table is referred to, for example, in a read operation according to a read command described later.

  Further, when the instruction execution unit 12 acquires a read command from the host device, the instruction execution unit 12 determines whether the disk area designation information included in the read command is registered in the conversion table. When the disk area designation information is registered in the conversion table, that is, when the target data to be written has already been written in the flash memory 14, the memory area designation information associated with the disk area designation information The target data is read out from the area on the flash memory 14 designated by, and returned to the host device. On the other hand, if the disk area designation information included in the read command is not registered in the conversion table, that is, if the target data to be read is not recorded in the flash memory 14, a read request is issued to the drive control unit 15. To do.

  Note that the read request includes disc area designation information for designating an area on the optical disc from which the target data is to be read, as in the read command. The drive control unit 15 specifies an area on the optical disk from which the target data is to be read by referring to the disk area designation information.

  The drive control unit 15 is a means for controlling each unit of the optical disc drive unit 20 in response to a request from the command execution unit 12, and is configured using, for example, a CPU (Central Processing Unit), like the command execution unit 12. be able to. A program for causing the CPU to function as the drive control unit 15 may be recorded in the ROM built in the drive control unit 15 or the DRAM 13 or the flash memory 14 included in the hybrid drive apparatus 1.

  For example, when a write request is received, the drive control unit 15 controls each unit of the optical disc drive unit 20 so as to write the target data in an area on the optical disc designated by the disc area designation information included in the write request. When receiving a read request, the drive control unit 15 controls each unit of the optical disc drive unit 20 so as to read the target data from the area on the optical disc designated by the disc area designation information included in the read request. Further, when receiving the activation request, the drive control unit 15 increases the rotation speed of the spindle motor to a predetermined rotation speed so that the writing / reading of the target data can be started immediately, and the optical disk drive unit. 20 is controlled to a state in which writing / reading is possible.

<Configuration of optical disk drive>
Next, the configuration of the optical disc drive unit 20 will be described with reference to FIG. FIG. 2 is a block diagram showing a configuration of the optical disc drive unit 20. As shown in FIG. 2, the optical disc drive unit 20 includes a spindle motor 21 and a pickup 22.

  The spindle motor 21 is a mechanism for rotationally driving the optical disc. The optical disk loaded in the optical disk drive unit 20 is clamped by the spindle motor 21 and rotated. When the spindle motor 21 rotates the optical disk, the optical disk can be traced in the circumferential direction by the pickup 22.

  The pickup 22 is a mechanism for writing a recording mark on an optical disc using a laser beam and reading a recording mark written on the optical disc using a laser beam. The pickup 22 includes a laser light source 23, a mirror 24, and an objective lens 25. The laser light emitted from the laser light source 23 is raised in a direction perpendicular to the recording surface of the optical disk by the mirror 24 and condensed on the recording surface of the optical disk by the objective lens 25.

  The pickup 22 is attached to the housing of the optical disc drive unit 20 via a pickup motor 26. The pickup motor 26 is a mechanism for moving the pickup 22 in the radial direction. When the pickup motor 26 moves the pickup 22 in the radial direction of the optical disk, the optical disk can be traced in the radial direction by the pickup 22.

  The objective lens 25 is attached to the pickup 22 via an actuator 27 as shown in FIG. The actuator 27 is a mechanism for adjusting the position of the objective lens 25 at high speed and accurately using a piezoelectric element. Accordingly, servo such as focus control for causing the focused spot to follow the recording surface of the optical disc and tracking control for causing the focused spot to follow the center of the groove of the optical disc are performed.

<Write operation>
Next, a write operation in the hybrid drive device 1 will be described with reference to FIGS.

  FIG. 3 is a sequence diagram showing the flow of the write operation in the hybrid drive device 1. More specifically, a write operation is shown in which m-bit stream data supplied from the host device is written to the optical disk in units of n bits in response to a write command given from the host device.

  In the following description, it is assumed that N seconds (first period) are required to transfer n bits of stream data. Since the writing speed for writing data to the flash memory 14 is faster than the transfer speed for transferring data from the host device, the time required to write n bits of stream data to the flash memory 14 is also N seconds. Also, since the data writing speed to the optical disk is faster than the transfer speed for transferring data from the host device, the time required for writing the n-bit stream data read from the flash memory to the optical disk (second period) is N. Shorter than seconds. This is even more true when n bits of stream data are compressed and written to the flash memory.

  When the interface 11 receives a write command from the host device (step S1), the interface 11 transfers the received write command to the instruction execution unit 12 (step S2). When receiving a write command from the interface 11, the instruction execution unit 12 refers to the size designation information included in the write command, thereby specifying the data size (here, m bits) of the stream data and storing it in the DRAM 13. By referring to the conversion table, the area on the flash memory 14 where the stream data is to be written is specified. As an area on the flash memory 14 to which the stream data is to be written, an empty area larger than the data size specified by the size specifying information included in the write command (preferably a continuous empty area, but a fragmented autumn area). For example).

  Subsequently, the instruction execution unit 12 starts writing the stream data supplied from the host device to the flash memory 14 (step S5). In FIG. 3, the flow of stream data from the host device to the flash memory 14 is indicated by reference numeral D1.

  The instruction execution unit 12 requests the drive control unit 15 to start the optical disc drive unit 20 (N−G) seconds after starting to write the stream data to the flash memory 14 (step S6). G is the time required to start up the optical disc drive unit 20 as described above. When receiving the activation request from the instruction execution unit 12, the drive control unit 15 starts activation of the optical disc drive unit 20 (step S7). When the activation of the optical disk drive unit 20 is completed (step S8), the drive control unit 15 reports the completion of activation to the command execution unit 12 (step S9).

  Upon receiving the activation completion report from the drive control unit 15, the command execution unit 12 requests the drive control unit 15 to write data (step S10). When receiving a write request from the instruction execution unit 12, the drive control unit 15 reads the n-bit stream data from the flash memory 14 and writes the n-bit stream data read from the flash memory 14 to the optical disk drive. The unit 20 is controlled (step S11). In FIG. 3, the flow of stream data from the flash memory 14 to the optical disc drive unit 20 is indicated by reference numeral D2. At this time, the area on the optical disk to which the stream data supplied from the host apparatus is to be written is the first n bits of the area on the optical disk designated by the disk area designation information included in the write command given from the host apparatus. The area of minutes.

  When the optical disk drive unit 20 completes the writing of the stream data for n bits (step S13), the drive control unit 15 reports the completion of writing to the command execution unit 12 (step S14). Upon receiving a write completion report from the drive control unit 15 (step S15), the command execution unit 12 requests the drive control unit 15 to stop the optical disc drive unit 20 (step S16). When receiving a drive stop request from the instruction execution unit 12, the drive control unit 15 stops the optical disc drive unit 20 (step S17). More specifically, the rotation of the spindle motor, the movement of the pickup motor, the control of the actuator, the irradiation of the laser light, etc. are stopped. Then, after confirming that the optical disk drive unit 20 has stopped (step S18), the drive control unit 15 issues a stop completion report to the command execution unit 12 (step S19).

  The hybrid drive device 1 writes the m-bit stream data supplied from the host device n bits at a time on the optical disc by repeating the processing from step S6 to step S19 described above. After writing all the data on the optical disk, the instruction execution unit 12 uses the memory area designation information for designating the area on the flash memory 14 to which the data has been written first, and the disk area for designating the area on the optical disk to which the data has been written later. The designation information is associated and stored in the DRAM 13 (step S21). When the storage of the disk designation information is completed (step S22), the instruction execution unit 12 returns a completion report for the write command to the host device via the interface 11 (steps S23 and S24). This completes a series of write operations.

  FIG. 4A is a timing chart showing the flow of the write operation in the hybrid drive device 1.

  At time t0, write processing MR for writing m-bit stream data to the flash memory 14 is started. Then, at the time t1 obtained by subtracting the activation time of the optical disk drive unit 20 from the time t2 when writing of the n-bit stream data into the flash memory 14 is completed, the activation process S for activating the optical disk drive unit 20 is started. Further, the write process DR for writing the n-bit stream data written in the flash memory 14 to the optical disk at the time of completing the start-up process S, that is, at the time t2 when writing the n-bit stream data into the flash memory 14 is completed. Be started. Then, as soon as the writing process DR on the optical disk is completed, a stop process E for stopping the optical disk drive unit 20 is started.

  Here, it should be noted that the period during which the writing process to the optical disk is performed is shorter than the period required to record the n-bit stream data supplied from the host device in the flash memory 14. That is, when the n-bit stream data supplied from the host device is directly recorded on the optical disc, the optical disc must be rotated for t2 seconds. In the operation example shown in FIG. Rotating time can be greatly shortened. For this reason, for example, the optical disk drive unit 20 can be maintained in a standby state or a stopped state in which power consumption is extremely low between time t3 and time t4. For this reason, significant power saving can be achieved.

  Here, the configuration has been described in which the writing process DR to the optical disk is started after the n-bit stream data has been written to the flash memory 14, but the timing of starting the writing process DR to the optical disk is limited to this. Is not to be done. For example, as shown in FIG. 4B, the timing for starting the writing process DR on the optical disk may be advanced. As a result, the timing at which the n bits of stream data have been written to the flash memory 14 can be made closer to the timing at which the optical disc writing process DR is completed. That is, it is possible to shorten the time until writing to the optical disc is completed.

<Read operation>
Next, a read operation in the hybrid drive device 1 will be described with reference to FIG. FIG. 5 is a sequence diagram showing the flow of the read operation of the hybrid drive device 1.

  When the interface 11 receives a read command from the host device (step S30), the interface 11 transfers the received read command to the instruction execution unit 12 (step S31). When receiving a read command from the interface 11, the instruction execution unit 12 searches whether the disk area designation information included in the read command is registered in the conversion table stored in the DRAM 13 (step S32).

  When the disk area designation information included in the read command is registered in the conversion table, the instruction execution unit 12 reads the memory area designation information associated with the disk area designation information from the conversion table (step S33). Then, the instruction execution unit 12 starts reading data from the area on the flash memory 14 designated by the memory area designation information read in step S33 (step S34). Here, the data read from the flash memory 14 is returned to the host device via the interface 11, as indicated by D10. When the reading is completed (step S35), the instruction execution unit 12 reports the reading completion via the interface 11 (steps S36 and S37).

As a result, the host device seems to start reading data on the optical disk without delay. In addition, since the optical disk is not accessed, it is not necessary to start the optical disk drive unit 20, thereby realizing power saving.
The interface receives a read completion report from the instruction execution unit 12 (step S36), and issues a read command end report to the host device (step S37), thereby completing the read process.

<Initial setting operation>
An optical disc drive is usually configured to perform an initial setting operation at the timing when an optical disc is loaded. Here, the initial setting operation refers to an operation of detecting the type of the loaded optical disc and switching the operation mode according to the detected type of the optical disc. Detection of the type of the loaded optical disk is realized by reading a servo signal while rotating the optical disk by a spindle motor.

  FIG. 6 is a timing chart showing the timing at which this initial setting operation is executed in the hybrid drive device 1. FIG. 6A to FIG. 6C illustrate the execution timing of the initial setting operation. 6A to 6C, T indicates a point in time when an optical disc is loaded, and C indicates a point in time when a write command is issued. Further, S indicates an optical disk drive start process, DR indicates a data write process on the optical disk, and E indicates an optical disk drive stop process.

  FIG. 6A shows an example in which the initial setting operation B is performed immediately after the time T of loading the disc. In the example shown in FIG. 6A, the optical disk drive unit can be maintained in the standby state after the initial setting operation B is completed until the start-up process S is started. Therefore, power consumption during this period can be reduced.

  FIG. 6B shows an example in which the initial setting operation B is performed immediately before the activation process S. Also in the example shown in FIG. 6B, the optical disk drive can be kept in the standby state from the time T when the disk is loaded until the initial setting operation B is started. Therefore, power consumption during this period can be reduced.

  As can be seen from FIG. 6B, the first access to the optical disk occurs from the time when the data writing process DR to the optical disk starts to the time required for the initial setting operation B and the starting process S. It is a retroactive time. Therefore, it is sufficient that the optical disk is loaded before the timing shown in FIG.

  In the case of the example shown in FIG. 6C, before the optical disk is loaded, writing of data to be written to the optical disk starts to the flash memory. In this case, the optical disk drive unit can be maintained in a standby state or a power-off state until T when the disk is loaded. Therefore, power consumption during this period can be reduced.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be widely applied to general recording apparatuses that record data on an optical disc. In particular, the present invention can be suitably used for a recording apparatus equipped with a recording medium capable of writing data with less power than an optical disk, such as a flash memory, in addition to an optical disk. Specifically, it is also suitable for an optical disk drive device, a recorder device incorporating an optical disk drive device, a television receiver incorporating an optical disk drive device, and the like.

1 Hybrid drive device (recording device)
11 Interface 12 Instruction execution unit (first recording means)
13 DRAM
14 Flash memory 15 Drive controller (second recording means)
DESCRIPTION OF SYMBOLS 20 Optical disk drive part 21 Spindle motor 22 Pickup 23 Laser part 24 Mirror 25 Objective lens 26 Pickup motor 27 Actuator

Claims (7)

First recording means for recording data acquired in the first period on a recording medium whose recording power is smaller than that of the optical disc;
And a second recording means for recording data recorded on the recording medium by the first recording means on an optical disc in a second period shorter than the first period.   The recording apparatus according to claim 1, wherein the second recording unit stops or decelerates the rotation of the optical disc in a period other than the second period.   The second recording means is configured to record the data acquired in the first period on the recording medium, or before recording the data acquired in the first period on the recording medium, 3. The recording apparatus according to claim 1, wherein recording of data recorded on a recording medium is started on the optical disc.   4. The recording apparatus according to claim 1, wherein the first recording unit compresses and records the data acquired in the first period on the recording medium. 5. A first recording step of recording data acquired in the first period on a recording medium whose power required for recording is smaller than that of an optical disc;
A second recording step of recording the data recorded on the recording medium in the first recording step on the optical disc in a second period shorter than the first period,
And a recording method.   A program for causing a computer to operate as the recording apparatus according to any one of claims 1 to 4, wherein the program functions as each unit included in the recording apparatus.   A computer-readable recording medium on which the program according to claim 6 is recorded.

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