JP4127519B2 - Power saving method and drive device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a power saving method.as well asMore particularly, the present invention relates to a drive device.as well asThe present invention relates to a drive device corresponding to a plurality of types of information recording media.
[0002]
[Prior art]
In recent years, with the rapid progress of digital technology and the improvement of performance of information devices such as personal computers (hereinafter referred to as “PCs”) and video devices, the amount of information (data amount) handled by information devices has increased rapidly. Yes. For this reason, optical discs such as CDs (Compact Discs) and DVDs (Digital Versatile Discs) capable of recording data equivalent to about 7 times the CDs on discs having the same diameter as CDs have been attracting attention as information recording media. Along with the lowering of the price, an optical disk device as a drive device for accessing the optical disk has come into wide use. CD-ROMs, CD-Rs (CD-recordables) and CD-RWs (CD-rewritables) are examples of CD-type optical disks, and DVD-ROMs, DVD-RAMs, DVD-s are examples of DVD-type optical disks. R (DVD-recordable), DVD-RW (DVD-rewritable), DVD + R (DVD + recordable), DVD + RW (DVD + rewritable), and the like are commercially available.
[0003]
The CD-type optical disc and the DVD-type optical disc have different wavelengths of laser light to be used due to the difference in recording density. A laser beam having a wavelength of about 780 nm is used to perform recording and reproduction on a CD optical disk, and a laser beam having a wavelength of about 660 nm to perform recording and reproduction on a DVD optical disk. Is used. Therefore, an optical disk device (CD optical disk device) for accessing a CD optical disk and an optical disk device (DVD optical disk device) for accessing a DVD optical disk are commercially available as separate devices. For example, some desktop personal computers incorporate a CD optical disk device and a DVD optical disk device, respectively.
[0004]
Recently, so-called notebook computers and sub-note computers smaller than that (hereinafter collectively referred to as “notebook computers”) that can be easily carried are commercially available. It became so. One of the features of the notebook personal computer is that its place of use is not limited. For this reason, not only an AC power source but also a battery can be used as a driving power source. The time that can be driven by a battery (hereinafter also referred to as “battery driving time”) has become one of the important performances of notebook personal computers, and has been influenced by sales.
[0005]
In a notebook personal computer having a built-in optical disk device (including a case where the optical disk device is removable), when the notebook personal computer is battery-powered, the optical disk device is also driven by the battery. In addition, even in the case of a so-called external optical disk device connected to a notebook computer by a cable, if the drive power is supplied from the notebook computer such as a USB (Universal Serial Bus) connection, the notebook computer When is driven by a battery, the optical disk apparatus is also driven by a battery. Therefore, in order to increase the battery driving time, it is required to reduce the power consumption in the optical disc apparatus.
[0006]
In addition, as the performance of notebook computers has improved, the types of content targeted for notebook computers have expanded to include music information and video information. Thus, there has been a growing demand for notebook computers that can use CD optical discs and DVD optical discs as information recording media. However, in the case of a notebook personal computer, space is limited, and it is difficult to incorporate a CD optical disk device and a DVD optical disk device as in a desktop personal computer. Have been developed (hereinafter also referred to as “multi-compatible optical disk devices” for convenience).
[0007]
However, since this multi-compatible optical disc apparatus supports two types of laser beams having different wavelengths, the corresponding laser beam wavelength is different from that of one type of optical disc device as in the above-described CD optical disc apparatus and DVD optical disc apparatus. The signal processing circuit and the signal control circuit are complicated. Therefore, for example, when a CD-type optical disk is accessed by a multi-compatible optical disk apparatus, more power is consumed than in the case of a CD optical disk apparatus. Could be exhausted.
[0008]
In view of this, various reproducing apparatuses have been devised to save power by selecting an operation circuit based on the type of information recording medium when reproducing data recorded on a plurality of types of information recording media (for example, Patent Documents). 1 to Patent Document 3). Note that when reproducing data recorded on an information recording medium, an operation circuit is selected on the basis of the type of the reproduction data, and a reproducing apparatus (for example, see Patent Document 4) for reducing power consumption, or rotating a spindle motor An optical disk device that controls power consumption to reduce power consumption (see, for example, Patent Document 5) and a control device that controls power supply in accordance with a load state (for example, see Patent Document 6) have been devised.
[0009]
[Patent Document 1]
JP-A-10-21631
[Patent Document 2]
JP 2000-90549 A
[Patent Document 3]
JP 2000-207817 A
[Patent Document 4]
JP 2000-149391 A
[Patent Document 5]
JP-A-9-73715
[Patent Document 6]
JP 2002-189540 A
[0010]
[Problems to be solved by the invention]
However, in the devices described in Patent Literature 1 to Patent Literature 3, power consumption can be reduced to some extent, but power saving is not sufficient, and unnecessary power consumption is generated. Therefore, for example, when the available power is subject to severe restrictions such as a battery in a notebook computer, there is a possibility that the effect of power saving cannot be expected.
[0011]
The present invention has been made under such circumstances, and a first object thereof is to provide a power saving method capable of reducing power consumption in a drive device.
[0013]
  In addition, the first of the present invention2An object of the present invention is to provide a drive device that can suppress consumption of the drive power supply and promote effective use of the drive power supply.
[0020]
[Means for Solving the Problems]
  According to a first aspect of the present invention, there is provided a power saving method in a drive device having a plurality of processing systems respectively corresponding to a plurality of types of information recording media and capable of accessing the plurality of types of information recording media,SaidpluralThe processing system is a recording system for recording information.RespectivelyIncludingDetermining whether or not the information recording medium subjected to the disk closing process is rewritable after the disk closing process is performed in response to the disk closing request of the information recording medium; A step of generating an event when it is not rewritable; and a step of setting an operation state of a recording system corresponding to a type of the information recording medium subjected to the disc closing process to a sleep state when the event occurs. It is a power saving method.
  According to this, when the information recording medium subjected to the disk closing process is not rewritable, at least the operating state of the recording system corresponding to the type of the information recording medium is set to the sleep state. In such a case, no processing in the recording system is required until the information recording medium is replaced, so that useless power consumption can be suppressed. Therefore, as a result, it is possible to reduce power consumption in the drive device. The processing system can include at least a reproduction system for reproducing information.
[0032]
  According to a second aspect, the present invention is a drive device having a plurality of processing systems respectively corresponding to a plurality of types of information recording media and capable of accessing the plurality of types of information recording media. Each system includes a recording system for recording information, and after the disk closing process is performed in response to a disk closing request of the information recording medium, the information recording medium subjected to the disk closing process can be rewritten. Means for determining whether or not; means for generating an event when the result of the determination is that rewriting is not possible;AboveSetting means for setting the operating state of the recording system corresponding to at least the type of the information recording medium subjected to the disk closing process to a sleep state in response to an event; access to any of the plurality of types of information recording media A processing device that accesses the information recording medium by setting an active state of the processing system corresponding to the information recording medium that is the target of the access request among the plurality of processing systems as an active state in response to a request. Device.
  According to this, when the information recording medium subjected to the disk closing process is not rewritable, the setting unit sets the operating state of the recording system corresponding to at least the type of the information recording medium to the sleep state. In such a case, no processing in the recording system is required until the information recording medium is replaced, so that useless power consumption can be suppressed. Therefore, as a result, it is possible to suppress consumption of the drive power source and promote effective use of the drive power source. The processing system can include at least a reproduction system for reproducing information.
[0035]
  From a third aspect, the present invention is a drive device having a plurality of reproduction systems and a plurality of recording systems respectively corresponding to a plurality of types of information recording media and capable of accessing the plurality of types of information recording media. ,Having a judging means for judging whether or not the information recording medium is rewritable;Setting means for setting an operating state of each of the plurality of reproduction systems and the plurality of recording systems to one of a sleep state and an active state based on the event when a predetermined event occurs; and the plurality of types of information recording A processing device that accesses the information recording medium using a reproduction system or a recording system corresponding to the information recording medium that is the target of the access request in response to an access request to any of the media,When there is a disk close request for the information recording medium, the setting means determines whether or not the information recording medium that is the target of the disk close request is rewritable by the determination means, and as a result of the determination, When the information recording medium is not rewritable, after the disk closing process is performed, the operating state of the recording system corresponding to at least the type of the information recording medium is set to the sleep state after the plurality of recording systems.It is a drive device characterized by that.
  According to this, when the information recording medium that is the target of the disk close request is not rewritable, the operating state of the recording system corresponding to at least the type of the information recording medium is set to sleep after the disk close process by the setting means. State. In such a case, it is clear that no processing in the recording system is required until the information recording medium is replaced, so that useless power consumption can be suppressed. Therefore, as a result, it is possible to suppress consumption of the drive power source and promote effective use of the drive power source. The processing system can include at least a reproduction system for reproducing information.
[0037]
  UpWritingIn live equipment,in frontThe setting means has a determining means for determining the type of the information recording medium set at a predetermined position, and the setting means, when the information recording medium is set at the predetermined position, the determining means When the type of the recording medium is determined and the type of the information recording medium is an accessible type, the operating state of a specific reproducing system corresponding to the type of the information recording medium among the plurality of reproducing systems is set to the active state The operating state of at least one of the plurality of playback systems excluding the specific playback system can be set to the sleep state.
[0038]
  In this case,in frontIf the information recording medium set at the predetermined position is not accessible as a result of the determination, the setting means sets the operating states of the plurality of reproduction systems to sleep. Can do.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a schematic configuration of an optical disc device 20 as a drive device according to an embodiment of the present invention.
[0040]
1 includes a spindle motor 22, an optical pickup device 23, a laser control circuit 24, an encoder 25, a motor driver 27, and a reproduction signal processing circuit 28 for rotationally driving an optical disk 15 as an information recording medium. A servo controller 33, a buffer RAM 34, a buffer manager 37, an interface 38, a flash memory 39, a CPU 40, a RAM 41, and the like. In addition, the connection line in FIG. 1 shows the flow of a typical signal and information, and does not represent all the connection relationships of each block. In this embodiment, as an example, the optical disc apparatus 20 includes an information recording medium (hereinafter abbreviated as “DVD”) compliant with a DVD standard and an information recording medium (hereinafter ““ DVD ”) compliant with a CD standard. CD (abbreviated as “CD”).
[0041]
Here, as an example, the encoder 25, the reproduction signal processing circuit 28, the buffer manager 37, and the interface 38 are integrated in one LSI.
[0042]
The optical pickup device 23 is a device for irradiating the recording surface on which the spiral or concentric tracks of the optical disk 15 are formed with laser light and receiving reflected light from the recording surface, and has a wavelength of 660 nm. Semiconductor laser that emits laser light (hereinafter also referred to as “DVD light source” for convenience), semiconductor laser that emits laser light having a wavelength of 780 nm (hereinafter also referred to as “CD light source” for convenience), and laser light emitted from each light source Is guided to the recording surface of the optical disk 15, and the optical system that guides the return light beam reflected by the recording surface to a predetermined light receiving position, the light receiver that is arranged at the light receiving position and receives the return light beam, and the drive system (focusing actuator, Tracking actuator, seek motor, etc. (all not shown). That is, the optical pickup device 23 is a so-called two-wavelength optical pickup device. A DVD light source is selected when the optical disk 15 is a DVD, and a CD light source is selected when the optical disk 15 is a CD.
[0043]
As shown in FIG. 2, the reproduction signal processing circuit 28 includes an I / V amplifier 28a, a servo signal detection circuit 28b, a wobble signal detection circuit 28c, an RF signal detection circuit 28d, a decoder 28e, and the like.
[0044]
The I / V amplifier 28a converts a current signal, which is an output signal of the light receiver of the optical pickup device 23, into a voltage signal and amplifies it with a predetermined gain. The servo signal detection circuit 28b detects a servo signal (such as a focus error signal and a track error signal) based on the output signal of the I / V amplifier 28a. The servo signal detected here is output to the servo controller 33. The wobble signal detection circuit 28c detects a wobble signal based on the output signal of the I / V amplifier 28a. The RF signal detection circuit 28d detects an RF signal based on the output signal of the I / V amplifier 28a.
[0045]
As shown in FIG. 3, the decoder 28e includes an ATIP decoder 281, an ADIP decoder 282, a CD decoder 283, a DVD decoder 284, a CD-ROM decoder 285, a DVD-ROM decoder 286, a D / A converter 287, and the like. Yes. The ATIP decoder 281, CD decoder 283, and CD-ROM decoder 285 are used when the optical disk 15 is a CD, and the ADIP decoder 282, DVD decoder 284, and DVD-ROM decoder 286 are used when the optical disk 15 is a DVD.
[0046]
The ATIP decoder 281 extracts ATIP (Absolute Time In Pregroove) information, a synchronization signal, and the like from the wobble signal detected by the wobble signal detection circuit 28c. The ATIP information extracted here is output to the CPU 40, and the synchronization signal is output to the encoder 25. The ATIP decoder 281 uses the clock signal CLK0 supplied from the CPU 40 as a system clock. Therefore, the ATIP decoder 281 enters an active state when the clock signal CLK0 is supplied, and enters a sleep state (low power consumption state) when the supply of the clock signal CLK0 is stopped.
[0047]
The ADIP decoder 282 extracts ADIP (Address In Pregroove) information, a synchronization signal, and the like from the wobble signal detected by the wobble signal detection circuit 28c. The extracted ADIP information is output to the CPU 40, and the synchronization signal is output to the encoder 25. The ADIP decoder 282 uses the clock signal CLK1 supplied from the CPU 40 as a system clock. Therefore, the ADIP decoder 282 becomes active when the clock signal CLK1 is supplied, and enters the sleep state (low power consumption state) when the supply of the clock signal CLK1 is stopped.
[0048]
The CD decoder 283 performs reproduction processing, error detection processing, error correction processing, and the like corresponding to the CD on the RF signal detected by the RF signal detection circuit 28d, and acquires reproduction data. The reproduction data obtained here is output to the CD-ROM decoder 285 in the case of data other than music data (for example, image data and document data), and is output to the D / A converter 287 in the case of music data. .
[0049]
The CD-ROM decoder 285 performs error detection and error correction processing on the reproduction data from the CD decoder 283 based on the check code added to the data, and stores it in the buffer RAM 34 via the buffer manager 37.
[0050]
The DVD decoder 284 performs demodulation processing, error detection processing, error correction processing, and the like corresponding to the DVD on the RF signal detected by the RF signal detection circuit 28d, and acquires reproduction data. The reproduction data obtained here is output to the DVD-ROM decoder 286 in the case of data other than music data (for example, image data or document data), and is output to the D / A converter 287 in the case of music data. .
[0051]
The DVD-ROM decoder 286 performs error detection and error correction processing on the reproduction data from the DVD decoder 284 based on the check code added to the data, and stores the data in the buffer RAM 34 via the buffer manager 37.
[0052]
In the following, the CD decoder 283, the CD-ROM decoder 285, and a circuit (not shown) used only when reproducing a CD will be collectively referred to as a “CD reproduction system”. In addition, the DVD decoder 284, the DVD-ROM decoder 286, and a circuit (not shown) used only when reproducing the DVD are collectively referred to as a “DVD reproduction system”.
[0053]
This CD reproducing system uses a clock signal CLK2 supplied from the CPU 40 as a system clock. Therefore, the CD reproduction system becomes active when the clock signal CLK2 is supplied, and enters the sleep state (low power consumption state) when the supply of the clock signal CLK2 is stopped.
[0054]
The DVD playback system uses the clock signal CLK3 supplied from the CPU 40 as a system clock. Therefore, the DVD playback system becomes active when the clock signal CLK3 is supplied, and enters the sleep state (low power consumption state) when the supply of the clock signal CLK3 is stopped.
[0055]
The D / A converter 287 converts the reproduction data (music data here) signal from the CD decoder 283 and the DVD decoder 284 into an analog signal.
[0056]
Returning to FIG. 1, the servo controller 33 generates a focus control signal for correcting a focus shift based on the focus error signal from the reproduction signal processing circuit 28, and corrects the track shift based on the track error signal. The tracking control signal is generated. Each control signal generated here is output to the motor driver 27.
[0057]
The motor driver 27 outputs a focusing actuator drive signal to the optical pickup device 23 based on the focus control signal, and outputs a tracking actuator drive signal to the optical pickup device 23 based on the tracking control signal. That is, tracking control and focus control are performed by the servo signal detection circuit 28b, the servo controller 33, and the motor driver 27. Further, the motor driver 27 outputs drive signals to the spindle motor 22 and the seek motor based on the control signal from the CPU 40, respectively.
[0058]
The buffer RAM 34 has a buffer area for temporarily storing data to be recorded on the optical disk and data reproduced from the optical disk, and a variable area for storing various program variables.
[0059]
The buffer manager 37 manages data input / output to / from the buffer RAM 34. Then, the CPU 40 is notified when the amount of data stored in the buffer area reaches a predetermined amount.
[0060]
The encoder 25 includes a CD encoder 251 and a DVD encoder 252 as shown in FIG. The CD encoder 251 is used when the optical disk 15 is a CD, and the DVD encoder 252 is used when the optical disk 15 is a DVD.
[0061]
The CD encoder 251 takes out the data stored in the buffer RAM 34 based on an instruction from the CPU 40 via the buffer manager 37, modulates data corresponding to the CD, adds an error correction code, etc., and writes it to the optical disc 15. A signal is generated and a write signal is output to the laser control circuit 24 in synchronization with the synchronization signal from the reproduction signal processing circuit 28.
[0062]
The DVD encoder 252 takes out the data stored in the buffer RAM 34 based on an instruction from the CPU 40 via the buffer manager 37, modulates data corresponding to the DVD, adds an error correction code, etc., and writes it to the optical disc 15. A signal is generated and a write signal is output to the laser control circuit 24 in synchronization with the synchronization signal from the reproduction signal processing circuit 28.
[0063]
Hereinafter, the CD encoder 251 and circuits (not shown) used only when recording on a CD are collectively referred to as “CD recording system”. In addition, the DVD encoder 252 and a circuit (not shown) used only when recording on a DVD are collectively referred to as a “DVD recording system”.
[0064]
This CD recording system uses a clock signal CLK4 supplied from the CPU 40 as a system clock. Therefore, the CD recording system becomes active when the clock signal CLK4 is supplied, and enters the sleep state (low power consumption state) when the supply of the clock signal CLK4 is stopped.
[0065]
The DVD recording system uses the clock signal CLK5 supplied from the CPU 40 as a system clock. Therefore, the DVD recording system enters an active state when the clock signal CLK5 is supplied, and enters a sleep state (low power consumption state) when the supply of the clock signal CLK5 is stopped.
[0066]
Returning to FIG. 1, the laser control circuit 24 controls the light emission power of the semiconductor laser based on the write signal from the encoder 25 and the instruction of the CPU 40. The laser control circuit 24 sets one of the CD light source and the DVD light source as a light source to be controlled based on an instruction from the CPU 40.
[0067]
The interface 38 is a bidirectional communication interface with a host (for example, a personal computer), and is compliant with the ATAPI (AT Attachment Packet Interface) standard as an example.
[0068]
The flash memory 39 stores a program including a program according to the present invention (hereinafter referred to as a “power-saving program”) that reduces power consumption, which will be described later, written in a code readable by the CPU 40. The flash memory 39 is a non-volatile memory, and the stored contents are retained even when the power supply is stopped.
[0069]
The CPU 40 controls the operation of each unit according to the program stored in the flash memory 39, and temporarily stores data necessary for control in the RAM 41 and the buffer RAM 34.
[0070]
<Processing at power-on>
Here, processing when power is supplied to the optical disc apparatus 20 configured as described above will be described with reference to FIGS. The flowcharts of FIGS. 5 and 6 correspond to a series of processing algorithms executed by the CPU 40. When the power-off state is changed to the power-on state, the start address of the program corresponding to the flowcharts of FIGS. 5 and 6 is set in the program counter of the CPU 40 as a power-on reset process, and the process starts.
[0071]
In the first step 401, an interrupt vector is set, each register is initialized, an input / output port is set, and a programmable timer is set.
[0072]
In the next step 403, the LSI is initialized. Specifically, initialization of the interface 38, initialization of the buffer RAM 34 (for example, area reservation), initialization of interrupt setting to the CPU 40, and the like are performed.
[0073]
In the next step 405, the program variables stored in the variable area of the buffer RAM 34 are initialized.
[0074]
In the next step 407, the supply of the clock signal CLK0 to the ATIP decoder 281 is stopped. As a result, the ATIP decoder 281 enters a sleep state.
[0075]
In the next step 409, the supply of the clock signal CLK1 to the ADIP decoder 282 is stopped. As a result, the ADIP decoder 282 enters a sleep state.
[0076]
In the next step 411, the supply of the clock signal CLK2 to the CD reproducing system is stopped. As a result, the CD playback system enters a sleep state.
[0077]
In the next step 413, the supply of the clock signal CLK3 to the DVD playback system is stopped. As a result, the DVD playback system enters a sleep state.
[0078]
In the next step 415, the supply of the clock signal CLK4 to the CD recording system is stopped. As a result, the CD recording system enters a sleep state.
[0079]
In the next step 417, the supply of the clock signal CLK5 to the DVD recording system is stopped. As a result, the DVD recording system enters a sleep state. That is, the optical disk device 20 is in a standby state.
[0080]
In the next step 419, it is determined whether or not the optical disk is set at a predetermined position. Here, as an example, the determination is made with reference to the signal level (“high level” or “low level”) of a predetermined input port. If the optical disk is not set, the determination here is denied and the process is terminated. That is, until the optical disk is loaded, the optical disk device 20 maintains the standby state, and power consumption during standby can be reduced. On the other hand, if the optical disk is set, the determination here is affirmed and the routine proceeds to step 451.
[0081]
In step 451, the clock signal CLK0 is supplied to the ATIP decoder 281. As a result, the ATIP decoder 281 enters an active state.
[0082]
In the next step 453, the clock signal CLK1 is supplied to the ADIP decoder 282. As a result, the ADIP decoder 282 becomes active.
[0083]
In the next step 455, the clock signal CLK2 is supplied to the CD reproducing system. As a result, the CD playback system becomes active.
[0084]
In the next step 457, the clock signal CLK3 is supplied to the DVD reproducing system. As a result, the DVD playback system becomes active.
[0085]
In the next step 459, the type of the optical disk 15 is determined. The type of the optical disk 15 is determined based on the reflectance on the recording surface, the amplitudes of the focus error signal and the track error signal, the wobble signal, TOC (Table Of Contents) information, PMA (Program Memory Area) information, and the like. The The determination result here is notified to the laser control circuit 24 and is also stored in the RAM 41 and referred to as needed.
[0086]
In the next step 461, it is determined whether or not the optical disc 15 is a CD based on the determination result in step 459. If the optical disk 15 is not a CD, the determination here is denied and the routine proceeds to step 463.
[0087]
In this step 463, it is determined whether or not the optical disk 15 is a DVD based on the determination result in the above step 459. If the optical disk 15 is a DVD, the determination here is affirmed and the routine proceeds to step 465.
[0088]
In step 465, the supply of the clock signal CLK0 to the ATIP decoder 281 is stopped. As a result, the ATIP decoder 281 that is not used is in a sleep state, and power consumption can be reduced.
[0089]
In the next step 467, the supply of the clock signal CLK2 to the CD reproduction system is stopped. As a result, a CD playback system that is not used is in a sleep state, and power consumption can be reduced.
[0090]
In the next step 469, a preset value is set and initialized in a standby timer for measuring the access interval from the host, and measurement is permitted. As a result, the value of the standby timer is decremented by -1 (countdown) every time a predetermined timer interrupt process is started. Then, the process ends. When the value of the standby timer becomes 0, the timer interrupt process does not count down.
[0091]
In step 461, if the optical disk 15 is a CD, the determination in step 461 is affirmed, and the process proceeds to step 471.
[0092]
In step 471, the supply of the clock signal CLK1 to the ADIP decoder 282 is stopped. As a result, the unused ADIP decoder 282 enters a sleep state, and power consumption can be reduced.
[0093]
In the next step 473, supply of the clock signal CLK3 to the DVD playback system is stopped. As a result, a DVD playback system that is not used is in a sleep state, and power consumption can be reduced. Then, the process proceeds to step 469.
[0094]
If the optical disk 15 is not a DVD in step 463, the determination in step 463 is denied and the process proceeds to step 475.
[0095]
In step 475, the supply of the clock signal CLK0 to the ATIP decoder 281 is stopped.
[0096]
In the next step 477, the supply of the clock signal CLK1 to the ADIP decoder 282 is stopped.
[0097]
In the next step 479, supply of the clock signal CLK2 to the CD reproduction system is stopped.
[0098]
In the next step 481, supply of the clock signal CLK3 to the DVD playback system is stopped. In other words, the optical disc apparatus 20 maintains a standby state until reloading is performed. Then, the process proceeds to step 469.
[0099]
<Processing during loading>
If the optical disk is not set at a predetermined position when the power is turned on, the same processes as those in steps 451 to 481 are performed when the optical disk is loaded. Even if the optical disk is set at a predetermined position when the power is turned on, the same processing as the processing in steps 451 to 481 is performed when reloading is performed.
[0100]
《Reproduction processing》
Here, a process (reproduction process) in the optical disk apparatus 20 when a command requesting reproduction of data recorded on the optical disk 15 from the host (here, a read command (Read Command)) is received will be described. It is assumed that the above processing when the optical disk 15 is loaded has already been performed, and it is determined that the optical disk 15 is, for example, either a CD or a DVD. That is, it is assumed that the optical disc apparatus 20 is not in a standby state. In addition, the recorded data is not music data as an example.
[0101]
《DVD playback processing》
First, the case where the optical disk 15 is a DVD will be described. Here, as described above, the ADIP decoder 282 and the DVD playback system are set to the active state, and the ATIP decoder 281 and the CD playback system are set to the sleep state.
[0102]
When the CPU 40 receives a read command from the host, the CPU 40 outputs a control signal for controlling the rotation of the spindle motor 22 based on the reproduction speed to the motor driver 27 and also indicates that the read command has been received. 28 is notified. When the rotation of the optical disk 15 reaches a predetermined linear velocity, the tracking control and the focus control are performed. Note that tracking control and focus control are performed as needed until the reproduction process is completed.
[0103]
The CPU 40 outputs a control signal for controlling the seek motor to the motor driver 27 so that the optical pickup device 23 is positioned at the reading start point based on the ADIP information output from the ADIP decoder 282 at every predetermined timing.
[0104]
When the optical pickup device 23 reaches the reading start point, the CPU 40 notifies the reproduction signal processing circuit 28. As a result, the reproduction signal processing circuit 28 reproduces data via the RF signal detection circuit 28d, the DVD decoder 284, and the DVD-ROM decoder 286, and accumulates them in the buffer RAM 34. The buffer manager 37 transfers the reproduction data stored in the buffer RAM 34 to the host via the interface 38 when the reproduction data is prepared as sector data.
[0105]
<< CD playback process >>
Next, the case where the optical disk 15 is a CD will be described. Here, as described above, the ATIP decoder 281 and the CD playback system are set to the active state, and the ADIP decoder 282 and the DVD playback system are set to the sleep state.
[0106]
When the CPU 40 receives a read command from the host, the CPU 40 outputs a control signal for controlling the rotation of the spindle motor 22 based on the reproduction speed to the motor driver 27 and also indicates that the read command has been received. 28 is notified. When the rotation of the optical disk 15 reaches a predetermined linear velocity, the tracking control and the focus control are performed. Note that tracking control and focus control are performed as needed until the reproduction process is completed.
[0107]
Based on the ATIP information output from the ATIP decoder 281 at every predetermined timing, the CPU 40 outputs a control signal for controlling the seek motor to the motor driver 27 so that the optical pickup device 23 is positioned at the reading start point.
[0108]
When the optical pickup device 23 reaches the reading start point, the CPU 40 notifies the reproduction signal processing circuit 28. As a result, the reproduction signal processing circuit 28 reproduces data via the RF signal detection circuit 28d, the CD decoder 283, and the CD-ROM decoder 285, and accumulates them in the buffer RAM 34. The buffer manager 37 transfers the reproduction data stored in the buffer RAM 34 to the host via the interface 38 when the reproduction data is prepared as sector data.
[0109]
That is, in the reproduction process, when the optical disk 15 is a DVD, the ADIP decoder 282 and the DVD reproduction system are set in an active state, and the ATIP decoder 281, each recording system, and the CD reproduction system are set in a sleep state. When the optical disc 15 is a CD, the ATIP decoder 281 and the CD playback system are set to the active state, and the ADIP decoder 282, each recording system, and the DVD playback system are set to the sleep state. Therefore, it is possible to reduce power consumption in the reproduction process without affecting the reproduction process.
[0110]
When the reproduction process is completed, the standby timer is initialized.
[0111]
<Processing with recording>
Next, processing in the optical disc apparatus 20 when a command requesting processing involving recording on the optical disc 15 is received from the host will be described with reference to FIG. The flowchart in FIG. 7 corresponds to a series of processing algorithms executed by the CPU 40. When a command requesting a process involving recording is received from the host, the head address of the program corresponding to the flowchart of FIG. 7 is set in the program counter of the CPU 40, and the process starts. As a command for requesting processing involving recording, a write command for requesting recording of user data, a reserve track command for requesting recording area reservation, and a request for closing a session are requested. There is a Close Session Command. Here, when the optical disk 15 is a DVD, the ADIP decoder 282 and the DVD playback system are already set in the active state, and the ATIP decoder 281, each recording system and the CD playback system are set in the sleep state. To do. When the optical disk 15 is a CD, it is assumed that the ATIP decoder 281 and the CD playback system are already set in the active state, and the ADIP decoder 282, each recording system and the DVD playback system are set in the sleep state.
[0112]
In the first step 501, it is determined whether or not recording is possible. Here, the determination is made based on whether the optical disk 15 has a necessary free space, whether the optical disk 15 is not in the write protect state, whether the address specified by the command is valid, or the like. If recording is possible, the determination here is affirmed and the routine proceeds to step 503.
[0113]
In this step 503, it is determined whether or not the optical disk 15 is a CD by referring to the determination result stored in the RAM 41. If the optical disk 15 is not a CD, the determination here is denied and the routine proceeds to step 505.
[0114]
In step 505, the clock signal CLK5 is supplied to the DVD recording system. As a result, the DVD recording system becomes active.
[0115]
In the next step 507, the supply of the clock signal CLK3 to the DVD playback system is stopped. As a result, the DVD playback system enters a sleep state.
[0116]
In the next step 509, recording processing corresponding to the DVD is performed. Here, since the ATIP decoder 281 that is not used, each reproduction system, and the CD recording system are in a sleep state, power consumption can be reduced. When all data from the host is recorded, the process proceeds to step 511. The recording process corresponding to the DVD will be described later.
[0117]
In the next step 511, the standby timer is initialized. Then, the process ends.
[0118]
In step 503, if the optical disk 15 is a CD, the determination in step 503 is affirmed, and the process proceeds to step 513.
[0119]
In step 513, the clock signal CLK4 is supplied to the CD recording system. As a result, the CD recording system becomes active.
[0120]
In the next step 515, the supply of the clock signal CLK2 to the CD reproduction system is stopped. As a result, the CD playback system enters a sleep state.
[0121]
In the next step 517, recording processing corresponding to the CD is performed. Here, since the unused ADIP decoder 282, each reproduction system, and the DVD recording system are in a sleep state, power consumption can be reduced. When all data from the host is recorded, the process proceeds to step 511. The recording process corresponding to the CD will be described later.
[0122]
Further, if recording is not possible in step 501, the determination in step 501 is denied and the process proceeds to step 519.
[0123]
In this step 519, the host is notified of the fact that recording is impossible and the reason, and then the process proceeds to step 511.
[0124]
<< DVD recording process >>
Here, the recording process corresponding to the DVD in step 509 will be described. Note that the command is a write command.
[0125]
First, a control signal for controlling the rotation of the spindle motor 22 based on the recording speed is output to the motor driver 27 and the reproduction signal processing circuit 28 is notified that a command requesting a process involving recording has been received from the host. To do. Thereby, when the rotation of the optical disk 15 reaches a predetermined linear velocity, the tracking control and the focus control are performed. Note that tracking control and focus control are performed as needed until the recording process is completed. Further, it instructs the buffer manager 37 to store the data received from the host in the buffer RAM 34.
[0126]
Then, based on the ADIP information output from the ADIP decoder 282 at every predetermined timing, a signal for controlling the seek motor of the optical pickup device so that the optical pickup device 23 is positioned at the designated writing start point is sent to the motor driver 27. Output to.
[0127]
When a notification is received from the buffer manager 37 that the amount of data accumulated in the buffer RAM 34 has exceeded a predetermined amount, the DVD encoder 252 is instructed to generate a write signal. When the optical pickup device 23 reaches the writing start point, the DVD encoder 252 is notified. As a result, data is written to the optical disk 15 via the DVD encoder 252, the laser control circuit 24, and the optical pickup device 23. When all the data received from the host is written, the recording process is terminated.
[0128]
<< CD recording process >>
Next, the recording process corresponding to the CD in step 515 will be described. Note that the command is a write command.
[0129]
First, a control signal for controlling the rotation of the spindle motor 22 based on the recording speed is output to the motor driver 27 and the reproduction signal processing circuit 28 is notified that a command requesting a process involving recording has been received from the host. To do. Thereby, when the rotation of the optical disk 15 reaches a predetermined linear velocity, the tracking control and the focus control are performed. Note that tracking control and focus control are performed as needed until the recording process is completed. Further, it instructs the buffer manager 37 to store the data received from the host in the buffer RAM 34.
[0130]
Based on the ATIP information output from the ATIP decoder 281 at every predetermined timing, a signal for controlling the seek motor of the optical pickup device so that the optical pickup device 23 is positioned at the designated write start point is sent to the motor driver 27. Output to.
[0131]
When a notification is received from the buffer manager 37 that the amount of data accumulated in the buffer RAM 34 exceeds a predetermined amount, the CD encoder 251 is instructed to generate a write signal. When the optical pickup device 23 reaches the writing start point, the CD encoder 251 is notified. As a result, the data is written to the optical disc 15 via the CD encoder 251, the laser control circuit 24, and the optical pickup device 23. When all the data received from the host is written, the recording process is terminated.
[0132]
That is, in the process involving recording, when the optical disk 15 is a DVD, the ADIP decoder 282 and the DVD recording system are set to the active state, and the ATIP decoder 281, each reproducing system, and the CD recording system are set to the sleep state. . When the optical disk 15 is a CD, the ATIP decoder 281 and the CD recording system are set to the active state, and the ADIP decoder 282, each reproducing system and the DVD recording system are set to the sleep state. Therefore, it is possible to reduce the power consumption in the process involving recording without affecting the process involving recording.
[0133]
《Disc close process》
Next, processing in the optical disk device 20 when a disk close request for the optical disk 15 is received from the host will be described with reference to FIG. The flowchart in FIG. 8 corresponds to a series of processing algorithms executed by the CPU 40. When a command requesting a disk close request from the host (here, Close Session Command) is received, the start address of the program corresponding to the flowchart of FIG. 8 is set in the program counter of the CPU 40, Processing starts. Whether the request is a session close request or a disk close request can be determined based on information added to the operation code of the close session command. Here, when the optical disk 15 is a DVD, the ADIP decoder 282 and the DVD playback system are already set to the active state, and the ATIP decoder 281, each recording system, and the CD playback system are set to the sleep state. To do. On the other hand, when the optical disk 15 is a CD, it is assumed that the ATIP decoder 281 and the CD playback system are already set in the active state, and the ADIP decoder 282, each recording system and the DVD playback system are set in the sleep state.
[0134]
In the first step 551, it is determined whether or not the disk closing process of the optical disk 15 is possible. Here, whether or not the information necessary for closing the disk can be recorded, such as whether or not the optical disk 15 is in a write-protected state, and the last address where data is recorded in the user data area provided on the optical disk 15 It is checked whether or not there is an unrecorded part before (inner circumference side), and it is determined whether or not the data can be correctly reproduced after the disc closing process. If the disk close process is possible, the determination here is affirmed and the routine proceeds to step 553.
[0135]
In this step 553, it is determined whether or not the optical disk 15 is a CD by referring to the determination result stored in the RAM 41. If the optical disk 15 is not a CD, the determination here is denied and the routine goes to Step 555.
[0136]
In step 555, the clock signal CLK5 is supplied to the DVD recording system. As a result, the DVD recording system becomes active.
[0137]
In the next step 557, the supply of the clock signal CLK3 to the DVD playback system is stopped. As a result, the DVD playback system enters a sleep state.
[0138]
In the next step 559, a disk close process corresponding to the DVD is performed. That is, predetermined information is recorded in a lead-in area and a lead-out area. Accordingly, since the ATIP decoder 281 that is not used, each playback system, and the CD recording system are set to the sleep state during the DVD disk closing process, the DVD disk closing process is not adversely affected. Power consumption can be reduced.
[0139]
In the next step 561, referring to the determination result stored in the RAM 41, it is determined whether or not the optical disk 15 is a rewritable disk (for example, DVD + RW). If the optical disk 15 is a rewritable disk, the determination here is affirmed, and there is a possibility that a command for processing request accompanied by recording may be received, so that the step is performed with the clock signal CLK5 supplied to the DVD recording system. 565. On the other hand, if the optical disk 15 is not a rewritable disk (for example, DVD + R), the determination here is denied and the routine proceeds to step 563.
[0140]
In this step 563, since a command for a processing request accompanying recording is not received continuously, supply of the clock signal CLK5 to the DVD recording system is stopped. Then, the process proceeds to step 565. Thereby, power consumption can be further reduced.
[0141]
In this step 565, the standby timer is initialized. Then, the process ends.
[0142]
If the optical disk 15 is a CD in step 553, the determination in step 553 is affirmed, and the routine proceeds to step 571.
[0143]
In step 571, the clock signal CLK4 is supplied to the CD recording system. As a result, the CD recording system becomes active.
[0144]
In the next step 573, the supply of the clock signal CLK2 to the CD reproducing system is stopped. As a result, the CD playback system enters a sleep state.
[0145]
In the next step 575, the disc closing process corresponding to the CD is performed. That is, predetermined information is recorded in the lead-in area and the lead-out area. Accordingly, since the ADIP decoder 282, each reproduction system, and the DVD recording system that are not used in the CD disk closing process are set to the sleep state, the CD disk closing process is not adversely affected. Power consumption can be reduced.
[0146]
In the next step 577, referring to the determination result stored in the RAM 41, it is determined whether or not the optical disk 15 is a rewritable disk (for example, CD-RW). If the optical disk 15 is a rewritable disk, the determination here is affirmed and there is a possibility of receiving a processing request command that accompanies recording. Therefore, the step is performed with the clock signal CLK4 supplied to the CD recording system. 565. On the other hand, if the optical disk 15 is not a rewritable disk (for example, CD-R), the determination here is denied and the process proceeds to step 579.
[0147]
In this step 579, since the processing request command accompanied by recording is not received continuously, the supply of the clock signal CLK4 to the CD recording system is stopped. Then, the process proceeds to step 565. Thereby, power consumption can be further reduced.
[0148]
If the disk close process is not possible in step 551, the determination in step 551 is denied and the process proceeds to step 581.
[0149]
In this step 581, the host is notified of the fact that the disk closing process cannot be executed and the reason thereof, and the process proceeds to step 565.
[0150]
<Standby processing>
Next, processing in the optical disc apparatus 20 when a standby request (standby request) is received from the host will be described with reference to FIG. The flowchart in FIG. 9 corresponds to a series of processing algorithms executed by the CPU 40. When a command requesting standby from the host (Standby Command) is received, the start address of the program corresponding to the flowchart of FIG. 9 is set in the program counter of the CPU 40, and the process starts. This process is also started when the timer value of the standby timer becomes 0 while measuring the access interval from the host.
[0151]
In the first step 601, the laser control circuit 24 is instructed to stop supplying the drive current to the semiconductor laser. Thereby, the light emission of the semiconductor laser is stopped.
[0152]
In the next step 603, the rotation of the spindle motor 22 is stopped via the motor driver 27.
[0153]
In the next step 605, the supply of the clock signal CLK0 to the CD reproduction system is stopped.
[0154]
In the next step 607, the supply of the clock signal CLK1 to the DVD playback system is stopped.
[0155]
In the next step 609, the supply of the clock signal CLK2 to the CD recording system is stopped.
[0156]
In the next step 611, the supply of the clock signal CLK3 to the DVD recording system is stopped.
[0157]
In the next step 613, the processing units other than each recording system and each reproducing system are set to the low power consumption mode. Here, the operation mode of each detection circuit in the laser control circuit 24, the motor driver 27, the servo controller 33, and the reproduction signal processing circuit 28 is a low power consumption mode. Note that the frequency of the system clock of each processing unit may be lowered instead of changing the operation mode.
[0158]
In the next step 615, the operation mode of the CPU 40 itself is changed to the sleep mode, and the process ends.
[0159]
For example, when there is a processing request accompanied by an optical disk access from the host, the sleep mode is canceled.
[0160]
As is clear from the above description, in the optical disc device according to the present embodiment, the setting means and the processing device are realized by the CPU 40 and the program executed by the CPU 40. However, it goes without saying that the present invention is not limited to this. That is, the above embodiment is merely an example, and at least a part of the setting means and the processing device realized by the processing according to the program by the CPU 40 may be configured by hardware, or all the configuration parts may be configured by hardware. It is good also as comprising.
[0161]
In the present embodiment, among the programs installed in the flash memory 39, the program corresponding to the processing of steps 411 to 417 in FIG. 5, the program corresponding to the processing of steps 479 and 481 in FIG. In FIG. 9, the power saving program is configured by a program corresponding to the processing of Step 561, Step 563, Step 577, and Step 579, and in FIG. 9, the program corresponding to the processing of Steps 605 to 611.
[0163]
As described above, according to the optical disk apparatus of the present embodiment, when the power is turned on, the CD playback system, DVD playback system, CD recording system, and DVD recording system are in the sleep state, so that they are in the standby state. Therefore, it is possible to reduce the power consumption in the conventional case.
[0164]
When the optical disk is set at a predetermined position, the operation state of each reproduction system is set to the active state, and the type of the set optical disk is determined. If the optical disc is a CD, the operation state of the DVD playback system is set to the sleep state, whereas if the optical disc is a DVD, the operation state of the CD playback system is set to the sleep state. As a result, it is possible to prevent the power from being consumed in a system that is not used, and it is possible to reduce the power consumption in the reproduction process as compared with the related art.
[0165]
Further, when there is a processing request accompanied by recording from the host, the operation state of each reproduction system is set to the sleep state, and if the optical disk to be processed is a CD, the operation state of the CD recording system is set to the active state. If so, the operating state of the DVD recording system is set to the active state. As a result, it is possible to prevent power from being consumed in a system that is not used, and it is possible to reduce power consumption in processing involving recording as compared with the conventional case.
[0166]
Further, when a disk close process is requested from the host, if the optical disk to be processed is a CD, the operating state of the CD recording system is set to the active state, whereas if it is a DVD, the operating state of the DVD recording system is set to the active state. Yes. When the disc closing process is completed, if the optical disc is not a rewritable disc, the operating state of the recording system is set to the sleep state. As a result, when it is clear that a request for processing involving recording is not made subsequently, the operating state of the recording system can be immediately set to the sleep state. Therefore, it is possible to prevent wasteful power consumption.
[0167]
When there is a standby request (standby request) from the host, the operating state of each recording system and each reproducing system is set to the sleep state. Thereby, it becomes possible to reduce the power consumption in a standby state compared with the past.
[0168]
When the timer value of the standby timer becomes 0, the operating state of each recording system and each reproducing system is set to the sleep state. As a result, it is possible to prevent wasteful power consumption when waiting for an access request from the host.
[0169]
In the above embodiment, the case where the supply of each system clock is stopped when the operating state of the ATIP decoder, ADIP decoder, each recording system and each reproduction system is set to the sleep state has been described. For example, the frequency of the system clock may be lowered. When the chip enable signal and the chip select signal are valid, the sleep state and the active state may be set using these signals.
[0170]
In the above embodiment, even if the type of the optical disk is compatible, if the recording quality of the optical disk is poor and predetermined information cannot be reproduced, the host may be notified and the standby state may be entered.
[0171]
In the above embodiment, the case where the encoder 25, the reproduction signal processing circuit 28, the buffer manager 37, and the interface 38 are integrated in one LSI has been described. However, the present invention is not limited to this. For example, the laser control circuit 24, motor driver 27. At least one of the servo controller 33 may be further integrated in the LSI.
[0172]
In the above embodiment, the case where the interface conforms to the ATAPI standard has been described. However, the present invention is not limited to this. For example, ATA (AT Attachment), SCSI (Small Computer System Interface), USB (Universal Serial Bus) 1.0 , USB2.0, IEEE1394, IEEE802.3, serial ATA, and serial ATAPI may be used.
[0173]
In the above-described embodiment, the case where the optical disk apparatus is compatible with CD and DVD has been described. However, the present invention is not limited to this, and any optical disk apparatus corresponding to a plurality of types of information recording media may be used. .
[0174]
In the above embodiment, the power saving program is recorded in the flash memory 39, but may be recorded in another recording medium (CD-ROM, DVD-ROM, magneto-optical disk, flexible disk, etc.). In this case, a drive device corresponding to each recording medium is added, and the power saving program is transferred from each drive device to the flash memory 39. Further, the power saving program may be transferred to the flash memory 39 via a network (LAN, intranet, Internet, etc.).
[0175]
In the above embodiment, the optical disk apparatus capable of recording and reproducing information has been described. However, the present invention is not limited to this, and an optical disk apparatus capable of only reproducing may be used when recording is not performed. In this case, the recording system is not included in the processing system corresponding to a plurality of types of optical discs, and the processing relating to the recording system and the processing using the recording system in the above embodiment are not required.
[0176]
In the above embodiment, the optical disk apparatus is used as the drive apparatus. However, the present invention is not limited to this.
[0177]
【The invention's effect】
As described above, according to the power saving method of the present invention, there is an effect that power consumption in the drive device can be reduced.
[0178]
Further, according to the program and the recording medium of the present invention, there is an effect that the power consumption in the drive device can be reduced by being executed by the computer for controlling the drive device.
[0179]
In addition, the drive device according to the present invention has an effect of suppressing the consumption of the drive power supply and promoting the effective use of the drive power supply.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of an optical disc apparatus according to an embodiment of the present invention.
2 is a block diagram for explaining a configuration of a reproduction signal processing circuit of FIG. 1; FIG.
FIG. 3 is a block diagram for explaining a configuration of a decoder in FIG. 2;
4 is a block diagram for explaining the configuration of the encoder of FIG. 1; FIG.
FIG. 5 is a flowchart (No. 1) for explaining processing according to the present invention when power is turned on;
FIG. 6 is a flowchart (No. 2) for explaining the processing according to the present invention at power-on.
FIG. 7 is a flowchart for explaining processing according to the present invention when a processing request accompanied by recording is received from a host;
FIG. 8 is a flowchart for explaining processing according to the present invention when a disk close request is received from a host;
FIG. 9 is a flowchart for explaining processing according to the present invention when a standby request is received from a host;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 15 ... Optical disk (information recording medium), 20 ... Optical disk apparatus (drive apparatus), 39 ... Flash memory (recording medium), 40 ... CPU (setting means, processing apparatus).

Claims (5)

A power saving method in a drive device having a plurality of processing systems respectively corresponding to a plurality of types of information recording media and capable of accessing the plurality of types of information recording media,
The plurality of processing systems each include a recording system for recording information,
Determining whether or not the information recording medium subjected to the disk closing process is rewritable after the disk closing process is performed in response to the disk closing request of the information recording medium;
Generating an event when the result of the determination is not rewritable;
When the event occurs, at least a step of setting the operating state of the recording system corresponding to the type of the information recording medium subjected to the disk closing process to a sleep state. A drive device having a plurality of processing systems respectively corresponding to a plurality of types of information recording media and capable of accessing the plurality of types of information recording media,
The plurality of processing systems each include a recording system for recording information,
Means for determining whether or not the information recording medium subjected to the disk closing process is rewritable after the disk closing process is performed in response to the disk closing request of the information recording medium;
Means for generating an event if the result of the determination is not rewritable;
Depending on the event, a setting unit to a sleep state to the operating state of at least a recording system in which the disk closing process corresponding to the type of made the information recording medium;
In response to an access request to any one of the plurality of types of information recording media, an operation state of a processing system corresponding to at least the information recording medium targeted for the access request among the plurality of processing systems is set as an active state. And a processing device for accessing the information recording medium. A drive device having a plurality of reproduction systems and a plurality of recording systems respectively corresponding to a plurality of types of information recording media and capable of accessing the plurality of types of information recording media,
And determining means for determining whether or not the information recording medium is rewritable. When a predetermined event occurs, the operating states of the plurality of reproduction systems and the plurality of recording systems are respectively set to sleep based on the event. Setting means for setting either the state or active state;
A processing device that accesses the information recording medium using a reproduction system or a recording system corresponding to the information recording medium to which the access request is made in response to an access request to any one of the plurality of types of information recording media; Comprising
When there is a disk close request for the information recording medium, the setting means determines whether or not the information recording medium that is the target of the disk close request is rewritable by the determination means, and as a result of the determination, When the information recording medium is not rewritable, the operation state of the recording system corresponding to at least the type of the information recording medium is set to the sleep state after the disc closing process is performed. Drive device. The setting means has a determination means for determining the type of the information recording medium set at a predetermined position,
When the information recording medium is set at the predetermined position, the setting means discriminates the type of the information recording medium by the discriminating means, and when the type of the information recording medium is an accessible type, the setting means The operation state of a specific reproduction system corresponding to the type of the information recording medium is set to an active state, and the operation state of at least one of the plurality of reproduction systems excluding the specific reproduction system is set to sleep. The drive device according to claim 3, wherein the drive device is in a state.   The setting means sets the operating states of the plurality of reproduction systems to sleep states when the type of the information recording medium set at the predetermined position is not accessible as a result of the determination. The drive device according to claim 4.

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