JP2004355779A - Optical disk device, optical disk format processing method, format processing program, optical disk device control method, and control program - Google Patents

Abstract

An object of the present invention is to reduce power consumption when driving power is supplied from a battery or the like in a background formatting process of an optical disc.
A content analysis of a control command received from an external side such as a host computer is performed, and based on the analysis result, an execution form of a background format process for an unrecorded area of the optical disc is controlled, and the format process is performed to save power. Executable even in operation mode.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical disc apparatus that performs one or both of recording and reproduction of information on an optical disc, and particularly to a background format process.
[0002]
[Prior art]
Conventionally, among rewritable optical disks, for example, a file system called random UDF has been applied to DVD + RW and CD-RW, and recording or reproduction on the disk can be performed at random. Format processing for recording irrelevant dummy data in an unrecorded area is required. The time required for the formatting process increases in proportion to the capacity of the disk recording medium. Background format processing has been proposed as a format processing for suppressing the time.
Conventional techniques related to the background format processing include those described in JP-A-11-134799 (Patent Document 1) and JP-A-2002-230754 (Patent Document 2). Japanese Patent Application Laid-Open No. H11-134799 discloses a background format process in which, when formatting an optical disc, after the format process starts, the next process can be accepted, and fixed-length packets are completely recorded on the entire recording area or a predetermined area. A technique is described in which, when a user data recording request is issued during background formatting processing, the formatting processing is temporarily suspended to record the user data, and then the formatting processing is resumed. Japanese Patent Application Laid-Open No. 2002-230754 discloses that, by switching between a processing speed in the case of data recording or reproduction processing in response to a user request and a processing speed in the case of format processing in the background, data recording or reproduction in response to a user request is performed. A technique is described in which a reproduction process and a format process in the background are performed under optimum speed control, so that the performance of each process is improved.
[0003]
[Patent Document 1]
JP-A-11-134799
[Patent Document 2]
JP-A-2002-230754
[0004]
[Problems to be solved by the invention]
In the above-described conventional optical disk device, when a rewritable optical disk is mounted, background formatting processing is performed during a period other than a period of data recording or reproduction processing requested by a user. For this reason, for example, when the optical disk device is connected to a battery-operated host computer such as a portable mobile personal computer and used in a form in which power is supplied thereto, the energy of the battery is reduced in a short time. As a result, the operation time of the optical disk device together with the host computer is shortened. In addition, the power consumption of the optical disk device is greatly increased due to the high-speed rotation of the optical disk and the increase in the output power of the laser during recording in accordance with the improvement of the transfer rate of the optical disk device. desired.
An object of the present invention is to reduce the power consumption of an optical disc device when drive power is supplied from a finite power source such as a battery in the background format processing of an optical disc in view of the situation of the related art. That is.
An object of the present invention is to provide a technique capable of solving such a problem.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention basically performs a content analysis of a received control command as a background format processing technique of an optical disc, and performs background analysis on an unrecorded area of the optical disc based on the analysis result. An execution mode of the format process is controlled, and the format process can be executed in a power saving operation mode. For example, in the control, based on the result of the content analysis, it is determined whether or not the driving power of the apparatus is supplied from a finite power source such as a battery. The execution mode of the background formatting process is set to the power save mode.
More specifically, the present invention proposes an optical disk device having the above-described basic configuration, a format processing method having the above-described basic operation with time, and a format processing program for causing a microcomputer or the like to execute the above-described basic procedure as a basic procedure. Furthermore, a method of controlling an optical disk device that detects a power state of a device or a device connection destination and generates a control command based on the detection result, and an optical disk device that causes a computer to detect the power state and generate a control command A control program is also proposed as the present invention.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 are explanatory diagrams of a first embodiment of the present invention. FIG. 1 is a diagram showing an example of the configuration of an optical disk device as a first embodiment of the present invention, FIG. 2 is an explanatory diagram of the basic operation of the device in FIG. 1, and FIG. 3 is a background format processing operation in the device in FIG. FIG. 4 is a diagram showing a state transition when there is no change in power supply in the processing by the apparatus of FIG. 1. FIG. 5 is a state transition when there is a change in power supply in the processing by the apparatus of FIG. FIG. FIG. 2 shows the basic operation from the loading operation of the optical disk to the processing operation in response to an operation request from an external device such as a host computer, and FIG. 3 shows the start of the background formatting process and the idle state (power saving for stopping the disk rotation and the like). 2 shows the flow up to the transition to (state).
[0007]
In FIG. 1, 1 is an optical disk, 2 is a pickup head which records information on the optical disk 1 as an optical signal, reads information recorded from the optical disk 1 as an optical signal and converts it into an electric signal, and 3 A modulation unit 4 for converting information to be recorded on the optical disc 1 into a signal suitable for recording on the optical disc 4, a buffer memory 5 for temporarily storing recording information and reproduction information obtained from the optical disc 1, An interface unit 6 for controlling data transfer to and from an external device such as a host computer connected to the device issues an operation request (host command) including recording and reproducing operations to the optical disk device, and records to the optical disk 1 A host command control unit 7 for transmitting and receiving information and reproduction information is a host command control unit A storage medium 8 such as a hard disk or a semiconductor memory in which a program code for controlling the generation of the optical disk is stored. The storage medium 8 controls the entire optical disk apparatus, moves the pickup head 2, rotates the optical disk 1, controls recording and reproduction on the optical disk. A system controller 9 for controlling the entire apparatus such as control; a demodulation unit 9 for performing processing necessary for reproducing the disc recorded information such as a demodulation process and an error correction process on a reproduction signal from the optical disc 1; , A servo processing unit for controlling the rotation of the optical disk 1 and the focus and tracking control of the pickup head 2, and the movement in the radial direction of the disk, a disk motor 11 for rotating the optical disk 1, and a feed unit 12 for the pickup head 2 It is.
[0008]
In FIG. 1, the optical disk device is a portion excluding, for example, components on the host computer side including a host command control unit 6 and a storage medium 7, and power is supplied to the device from the host computer side, for example. The host command control unit 6 is configured to be able to directly reference the power supply state to the host computer or the optical disk device, or to be able to refer to the host control unit (for example, the operating system of the host). The power supply information is information indicating whether the drive power of the host computer or the optical disk device is supplied from a battery. Based on the above reference, it is determined whether or not the drive of the host computer or the optical disk device has a time limit, and whether or not the power saving (low power) drive is required for the host computer or the optical disk device. Hereinafter, in the description of FIGS. 2 to 4, the same reference numerals as those in FIG. 1 are used for the components of the optical disk device.
[0009]
FIG. 2 is an explanatory diagram of a process performed after the optical disk is mounted on the optical disk device of FIG.
In FIG.
(1) When the optical disk 1 is loaded, the optical disk device performs identification processing of the type of the optical disk (CD, DVD, read-only disk, write-once disk, rewrite disk, etc.) and initial processing (disk rotation control, laser in the pickup head 2). Lighting, focusing, tracking control, reading of necessary information such as lead-in information, etc.) are performed, and a process for recording and reproducing information on and from various optical disks is performed (step S201). On the other hand, the host command control unit 6 refers to the power supply information, generates and transmits a control command including the information. The control command is generated in the host command control unit 6 according to the program code read from the storage medium 7.
(2) The system controller 8 receives the control command via the interface unit 5, analyzes the content of the received control command, and from the analysis result, the operation required for the drive is limited in the power supply time. Whether the status (power save mode) or not (non-power save mode), the control for limiting the progress of the background formatting process performed on the optical disc 1 (power save mode) is applied, or the format progress is prioritized It is determined whether the control (non-power save mode) is applied (step S202). On the other hand, the system controller 8 waits for an operation request command for the optical disk device from the host computer, such as a read or write command for the optical disk 1, to be received.
(3) If a control command has been received by the interface unit 5 (step S203-Yes), the system controller 8 executes a process requested from the command content (step S204). For example, when recording or reproduction on the optical disk 1 is requested, the system controller 8 controls the servo processing unit 10 to access the optical disk 1 and further controls the modulation unit 3, the demodulation unit 9, and the buffer memory 4. Thus, the read and write operations on the optical disk 1 are controlled. When the processing for the operation request is completed, the control request reception standby state is again set.
(4) On the other hand, when there is no operation request from the host computer side (No at Step S203), the system controller 8 activates a process of transitioning the state of the recording / reproducing device to the idle state (Step S205).
[0010]
FIG. 3 is an explanatory diagram of a background format processing operation in the optical disk device of FIG. The background format process is a process of recording an unrecorded area on the optical disc 1 with dummy data. The system controller 8 controls access to the servo processing unit 10 and controls the modulation unit 3, the demodulation unit 9, and the buffer memory 4. To control the format processing. In a normal background formatting process, the formatting process is executed during a period in which there is no request for an operation related to reproduction or recording on the optical disc 1.
In FIG.
(1) The system controller 8 acquires the disk status such as the previous format end position and the format status (end, partial end) (step S301). The acquisition of the disk state is performed, for example, by reading from the optical disk in the initial processing in step S201 in FIG.
(2) The system controller 8 determines the presence or absence of an unformatted area in the recording area of the optical disk 1 from the acquired disk state (step S302).
(3) As a result of the determination, if there is no unformatted area (No at Step S302), the process proceeds to the idle transition process, and the optical disk device is transitioned to the idle state by stopping the rotation of the disk motor 11 or the like ( (Step S308) After that, the operation waits for an operation request from the host computer (step S309).
(4) If the result of determination in step S302 is that there is an unformatted area (step S302-Yes), the system controller 8 changes the state of power supply to the host computer or optical disk device acquired in step S202 in FIG. With reference to the power saving mode, a selection is made as to the execution mode of the background formatting process (step S303).
(5) When the power save mode is selected as the selection (step S303-Yes), a partial format process is performed (step S305).
[0011]
(6) When the non-power save mode is selected in step S303 (step S303-No), a full format process is performed (step S304). In the case of the full format process, the format process for all the unformatted areas existing on the optical disc 1 is started, and at the end of the process, the information about the disc status such as the format status is temporarily stored by the system controller 8 or written on the optical disc (step S307). . Further, an idle transition process is performed (step S308), and thereafter, a standby state waits for an operation request from an external host computer (step S309).
[0012]
(7) When the partial format process of step S305 is started, the system controller 8 limits the number of recording blocks for performing the format process and the execution time of the format process. The number of recording blocks and the execution time are numerical values of zero or more. If an unrecorded portion exists between pieces of recorded information recorded on the optical disc 1, a format process may be performed only on the unrecorded portion. After the processing is completed, information on the disk state such as the format state is temporarily stored by the system controller 8 or written on the optical disk (step S307). Further, an idle transition process is performed (step S308), and thereafter, a standby state is waited for an operation request from the host computer (step S309). In the above, when the partial format processing of the step S305 is not applied, the process directly transits from the step S303 to the idle state of the step S308.
[0013]
FIG. 4 is a state transition diagram for each process such as a full format process, a partial format process, and an idle performed in the optical disk device, and shows a state when there is no change in the power supply state (power save mode, non-power save mode fixed). The transition is shown.
In FIG. 4, when an operation request is issued from the host computer during the partial format or full format processing (state 402, state 403), the system controller 8 suspends the format processing and saves the disk state, and Priority is given to the processing for the operation request. After the operation request processing is completed, the format processing is restarted after the format processing interruption area with reference to the saved disk state. In particular, when resuming the partial format processing, the format processing is performed by re-applying the predetermined number of blocks and the execution time, or the processing for the remaining number of blocks and the execution time at the time when the format processing is interrupted is performed. The case is conceivable. When the various format processes in the state 402 or the state 403 are completed, the state transits to the idle state 401 and waits for an operation request from the host.
A case where an operation request occurs in the idle state 401 will be described. When the state transitions from the state 402 to the state 401, since there is no unformatted area on the disk, the operation returns to the idle state 401 after the operation request processing ends. When the state has transitioned from the state 403 to the state 401 and there is an unformatted area, the state transitions to the state 403 after the operation request processing is completed, and transitions to the state 401 after the processing is completed. This operation is repeated as long as there is an unformatted area.
[0014]
FIG. 5 is a state transition diagram for each process such as a full format process, a partial format process, and an idle performed in the optical disk device. In each state, the power supply state changes in a power save state or a non-power save state. Is shown. The host command control unit 6 transmits a control command to the optical disk device every time the power supply state to the host computer or the optical disk device changes, and in the optical disk device, the system controller 8 receives the control command every time the control command is received. Recognize the power supply state (power save, non-power save) in the device.
In FIG. 5, when the system controller 8 detects a change to the power save mode during full format processing (state 502), that is, during operation in the non-power save mode, the state transitions to step 503, where the partial format processing is performed. Is executed again, or the formatting process is stopped. After the processing is completed, the state transits to the idle state 501 and enters a standby state waiting for an operation request from the host computer. On the other hand, if the system controller 8 detects a change to the non-power save mode during the partial format processing (state 503), that is, while operating in the power save mode, the state transitions to step 502. After the completion of the full format processing, the state transits to the idle state 501 and waits for an operation request from the host computer. When the optical disk device changes the power supply state in state 502 or state 503, a state transition is made between the two states.
[0015]
If the state of the optical disc apparatus is the idle state 501, the system controller 8 detects a change from the power save mode to the non-power save mode, and if an unformatted area exists, the state transits to the state 502. If a change from non-power save to power save is detected in state 501 or if there is no unformatted area, state 501 is maintained. When the partial format processing is not applied, a state transition is performed between the state 502 and the state 501 according to the power supply state. When the change to the power save mode is detected in the state 502 or when the formatting is completed, the state directly transitions to the idle state 501, the change to the non-power save mode is detected in the state 501, and an unformatted area exists. In this case, the state transits to the state 502.
[0016]
The operation of the optical disk device according to the first embodiment described with reference to FIGS. 2 to 5 is performed by the system controller 8 executing the procedure of the operation according to a preset program. The program is stored in a memory in the optical disk device or a hard disk to be mounted.
[0017]
According to the first embodiment, it is possible to select the operation mode of the optical disk device according to the power supply state. In the background formatting of an optical disc, when the driving power is supplied from a finite power source such as a battery, the background formatting can be switched to a power save mode, and the power consumption of the optical disc device can be reduced. Become.
[0018]
FIG. 6 shows the operation of the optical disk apparatus according to the second embodiment of the present invention. In the second embodiment, the transition time to the idle state in the optical disk device is controlled according to the power supply state to the host computer or the optical disk device. Also in the second embodiment, it is assumed that the hardware configuration of the optical disk device is basically the same as that of the first embodiment shown in FIG. Hereinafter, in the description of FIG. 6, the same reference numerals as those in FIG. 1 are used for the components of the optical disk device.
[0019]
The host command control unit 6 generates and outputs a control command in which power supply information to the host computer or the optical disk device is set, and which is reflected in the transition time of the optical disk device to the idle state. Specifically, in the case of the power save mode, by setting a short idle transition time, power consumption due to disk rotation or the like is suppressed. In the non-power save mode, by setting a longer idle transition time, a long operation request waiting time while rotating the disk is secured, and priority is given to responses to read and write operation requests to the optical disk. Let it. In the case of the non-power save mode, there may be a case where a setting for not stopping the disk rotation is performed. The host command control unit 6 generates a control command every time a change in the power supply state is detected, and transmits the control command to the optical disk device.
[0020]
6, the processing contents in steps S601 and S602 are respectively the same as the processing contents in step S201 and step S202 in FIG. After the process of step S602, the system controller 8 sets a timer for the transition time set value to the idle state detected from the received control command (step S603), and enters a standby state waiting for an operation request (step S604). If there is an operation request, the request is executed (step S605). After step S605, the system controller 8 references and sets the idle transition time by the control command again (step S606). When step S606 is started, the idle transition time transmitted by the control command is applied. If the set time has elapsed without an operation request in step S604, the system controller 8 performs a transition process to an idle state such as a stop of disk rotation (step S607), and enters a standby state waiting for an operation request (step S608). ).
The operation of the optical disk device described in FIG. 6 is performed by the system controller 8 executing the procedure of the operation according to a preset program. The program is stored in a memory in the optical disk device or a hard disk to be mounted.
[0021]
According to the second embodiment as well, the operation of the optical disk device can be selected according to the power supply state. When the drive power is supplied from a battery or the like, the transition time to the idle state in the optical disk device can be shortened. In addition, the power consumption of the optical disk device can be reduced.
[0022]
FIG. 7 shows a third embodiment of the present invention, and is an explanatory view of the operation of the optical disk device. In the third embodiment, the transfer rate in the optical disk device is controlled according to the power supply state to the host computer or the optical disk device. Also in the third embodiment, the hardware configuration of the optical disk device is basically the same as that of the first embodiment, and has the configuration shown in FIG. Hereinafter, also in the description of FIG. 7, the same reference numerals as those in FIG. 1 are used for the components of the optical disk device.
The host command control unit 6 generates and outputs a control command in which the power supply information to the host computer or the device is reflected in the set data transfer rate value. Specifically, in the case of the power save mode, the data transfer rate set value is set lower than the transfer rate of the optical disk device, and the power consumption is suppressed by rotating the optical disk at a low speed. In the non-power save mode, the data transfer rate set value is set high and the disk is rotated at high speed to give priority to the data transfer rate in the read and write operations on the optical disk. In the case of non-power save, it may be possible to set the maximum data transfer rate value of the optical disk device. The host command control unit 6 generates a control command every time a change in the power supply state is detected, and transmits the control command to the optical disk device.
[0023]
7, the processing contents in steps S701 and S702 are the same as the processing contents in step S201 and step S202 in FIG. 2, respectively. After the process of step S602, the system controller 8 sets the disk rotation speed according to the data transfer rate setting value detected from the received control command in the servo control unit 10, sets the rotation speed of the optical disk, and sets the rotation speed. The modulation unit 3 and the demodulation unit 9 are set according to the transfer rate with respect to the rotation speed of the optical disk (step S703), and a standby state waiting for an operation request is made (step S704). If there is a reproduction or recording operation request for the optical disk 1 in step S704, the system controller 8 refers to the data transfer rate set value set by the control command (step S705), and sets the optical disk rotation speed according to the set value. Are executed (steps S705 and S706), and after the processing is completed, the operation waits for an operation request. As described above, every time an operation request such as reading or writing to the optical disk is generated in step S704, the disk rotation speed for the received data transfer rate setting value is applied in steps S705 and S706. If the set time has elapsed without an operation request in step S704, the system controller 8 performs a transition process to an idle state such as a stop of disk rotation (step S707), and enters a standby state waiting for an operation request (step S708). ).
The operation of the optical disk device described with reference to FIG. 7 is also performed by the system controller 8 executing the procedure of the operation according to a preset program. The program is stored in a memory in the optical disk device or a hard disk to be mounted.
[0024]
According to the third embodiment, the operation of the optical disk device can be selected according to the power supply state. When the drive power is supplied from a battery or the like, the transfer rate or the disk rotation speed of the recording / reproducing process in the optical disk device is changed. By setting it low, it is possible to reduce the power consumption of the optical disk device.
[0025]
The techniques of the first, second, and third embodiments may be appropriately combined. In this case, it is possible to further improve the power consumption suppressing effect in the power save mode. Further, in the first embodiment, the command is not limited to the command transmitted including the power supply information, but may be included in a command for an operation request such as recording or reproduction with respect to the optical disc device, or may be a command for starting or stopping the format process. In the case of using, notification by an interface bus is also conceivable.
[0026]
Conversely, the control of the device while controlling the power supply state only by the host command control unit as in the second and third embodiments may be performed, and the information for identifying the power supply state may be included in the command. Conceivable. Further, in the optical disk device of FIG. 1, the system controller 8 may refer to the power supply information. In this case, the system controller 8 selects the format processing in the first embodiment, sets the transition time to the idle state in the second embodiment, and sets the data transfer rate in the third embodiment according to the referred power supply information. I do. Further, an appropriate idle transition time and data transfer rate setting may be requested from the host computer according to the power supply state. Further, when the power supply state changes, the host command control unit in FIG. 1 may immediately transmit a control command reflecting the change, or may detect, for example, a change in battery power, and After detecting that the remaining capacity has fallen below a certain threshold, a control command reflecting the power state may be transmitted.
[0027]
【The invention's effect】
According to the present invention, the operation mode of the optical disk device can be selected according to the power supply state, and the background formatting process in the power save state can be performed.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration example of an optical disc device according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram of a basic operation of the device of FIG. 1;
FIG. 3 is an explanatory diagram of a background format processing operation in the apparatus of FIG. 1;
FIG. 4 is a diagram showing a state transition when there is no change in power supply in the device of FIG. 1;
FIG. 5 is a diagram showing a state transition in a case where there is a change in power supply in the apparatus of FIG. 1;
FIG. 6 is an explanatory diagram of a second embodiment of the present invention.
FIG. 7 is an explanatory diagram of a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Optical disk, 2 ... Pick-up head, 3 ... Modulation part, 4 ... Buffer memory, 5 ... Interface part, 6 ... Host command control part, 7 ... Storage medium, 8 ... System controller, 9 ... Demodulation part, 10 ... Servo processing Unit, 11: disk motor, 12: head feed means.

Claims (8)

An optical disc device for recording and / or reproducing information from / on an optical disc,
Receiving means for receiving a control command from outside;
Control means for analyzing the content of the received control command, and controlling an execution form of a background format process on an unrecorded area of the optical disc based on the analysis result;
An optical disc apparatus characterized in that the background formatting process can be executed in a power saving operation mode by the control command. The control means identifies whether or not the drive power of the device is supplied from a finite-type power supply based on the result of the content analysis. 2. The optical disk apparatus according to claim 1, wherein an execution form of the background formatting process is an execution form in which the driving power is reduced. 2. The optical disk device according to claim 1, wherein said control means also performs system control of the entire device. 2. The optical disk device according to claim 1, wherein the control means controls the execution format of the background format processing by a program. An optical disc format processing method, comprising:
Receiving a control command from an external device;
Analyzing the content of the received control command;
Based on the analysis result, identifying whether the drive power of the device is supplied from a finite type power supply,
As a result of the identification, when the drive power is supplied from a finite type power supply, limiting the execution form of the background formatting process to those in which the drive power is reduced,
Performing the above-described background formatting process through the method. An optical disc format processing program,
On the computer,
A procedure for analyzing the content of the control command received from the external device,
Based on the above analysis results, a procedure for identifying whether or not the driving power of the device is supplied from a finite type power supply,
As a result of the identification, when the driving power is supplied from a finite type power supply, a procedure for restricting the execution form of the background formatting process to one in which the driving power is reduced,
A program for format processing, characterized in that the program is executed. A method for controlling an optical disk device, comprising:
Detecting a power state of the device or a device connection destination;
Generating a control command based on the detection result;
Transmitting the generated control command;
A control method for an optical disk device, wherein the control method causes the optical disk device to perform a control operation through the following. A control program for controlling an optical disk device,
On the computer,
A procedure for detecting the power state of the device or the device connection destination;
A procedure for generating a control command based on the detection result,
Transmitting the generated control command,
And a control program for causing the optical disc device to perform a control operation.

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