JP2007035156A - Data recording apparatus, data recording method, data recording program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the power consumption of a disturbance detecting means provided in a data recording apparatus. <P>SOLUTION: When a removable HDD 150 is inserted into a socket 140b, a card I/F means 135b informs insertion of the removable HDD 150 to a system control means 170 through a system bus 175. When setting of reading and writing for the removable HDD 150 is performed, the system control means 170 performs conducting-electricity/reset and initialization for an acceleration sensor module 165. When the removable HDD 150 is pulled out or setting of reading and writing for the removable HDD 150 is not performed, conducting electricity of the acceleration sensor module 165 is stopped. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data recording apparatus, a data recording method, a program thereof, and a recording medium for writing data to a randomly accessible recording medium.

  Conventionally, portable imaging devices have recorded video signals and audio signals on a magnetic tape wound in a cassette. In recent years, imaging devices using a recording medium instead of a magnetic tape are spreading on the market.

  As one of imaging devices using a recording medium instead of a magnetic tape, there is an imaging device that records moving image data on a disk-shaped recording medium. The disk-shaped recording medium is an optical information recording medium that can record and reproduce signals using, for example, laser light, and examples thereof include DVD-R, DVD-RW, and DVD-RAM. Further, for example, a small removable HDD represented by a microdrive (registered trademark of Hitachi Global Storage Technologies) is also included in the disk-shaped recording medium. Unlike a magnetic tape, a disc-shaped recording medium can be randomly accessed, so that operations such as cueing and skipping of captured moving image data can be performed in a short time, and convenience that cannot be realized with a magnetic tape can be provided to the user.

  As recording media, there are also imaging devices that record moving image data in a small-accessible small-sized semiconductor memory such as an SD (Secure Digital) card. Semiconductor memory is rapidly spreading in the market due to the widespread use of imaging equipment such as camera-equipped mobile phones and digital cameras, and the convenience and formability of carrying data easily. Although it is a semiconductor memory that is more expensive and has a smaller capacity than a disk-shaped recording medium, the capacity has been increased with the progress of semiconductor integration technology. The writing speed has also been improved, and high quality moving images, that is, a large amount of data can be recorded for a long time. Furthermore, imaging devices compatible with both disk-shaped recording media and semiconductor memories are also on the market, and in such imaging devices, it is imaged whether the recorded moving image data is recorded on a disk-shaped recording medium or a semiconductor memory. The user of the device often chooses.

  In addition, digital cameras, which are imaging devices that record still image data, are also able to use removable HDDs as recording media in addition to semiconductor memory in response to the growing demand for recording high-quality images approaching those of film cameras. Models are on the market.

  By the way, it is a well-known fact that the impact resistance of a disk-shaped recording medium is lower than that of a semiconductor memory. This is because reading and writing of data to and from the semiconductor memory is realized only by electrical action, while reading and writing of data to and from the disk-shaped recording medium is performed by rotating the disk or by moving a magnetic head or pickup on the disk. This is due to the accompanying physical action such as moving to the position of. For example, in the case of an HDD which is a disk-shaped recording medium recording medium, when a drop or impact occurs, the magnetic head for reading / writing data is displaced from the track of the HDD (off-track), and data cannot be read / written correctly.

  In order to protect a disk-shaped recording medium from external forces such as dropping and impact, an invention has been made on a protection mechanism used in a magnetic disk device as disclosed in Patent Document 1, for example. FIG. 7 shows a conventional magnetic disk device protection mechanism described in Patent Document 1.

  In FIG. 7, a fall determination circuit 13 including a state detection sensor 10, a drop determination mechanism 11 and a retraction control mechanism 12, and an off-track impact determination circuit 17 including an acceleration sensor 14, an off-track impact determination mechanism 15, and a writing control mechanism 16. The magnetic disk device protection mechanism 18 has a signal from each determination circuit received by the magnetic disk control mechanism 19 and protects the magnetic disk device 20 and the magnetic head 22 with respect to the magnetic disk device 20. Specifically, when it is determined by the signal from the state detection sensor 10 that a drop has occurred in the drop determination mechanism 11, a drop determination signal is output to the retraction control mechanism 12. The retract control mechanism 12 outputs a signal for the magnetic head retract process to the magnetic disk control mechanism 19. Further, when it is determined by the signal from the acceleration sensor 14 that the off-track impact determination mechanism 15 has applied an impact that may cause off-track, an off-track impact determination signal is output to the writing control mechanism 16. The write control mechanism 16 outputs a signal for stopping writing to the magnetic disk 20 through the magnetic disk control mechanism 19.

  On the other hand, an invention in which an external force detecting means is provided in a data recording apparatus instead of a recording medium has been made. For example, in Patent Document 2, vibration is detected by a vibration detection means which is an external force detection means provided in a data recording apparatus that can use both an HDD and a semiconductor memory. When vibration is detected, the data write target is changed from the HDD to the semiconductor memory.

Moreover, in patent document 3, a fall is detected by the pressure sensor which is an external force detection means with which the portable electronic device was equipped. When the fall is detected, the magnetic head is retreated to a predetermined retreat area in order to avoid damage to the magnetic disk medium.
JP 2002-208239 A JP 2004-173244 A JP 2000-339893 A

  However, in any of the conventional techniques described above, it is not assumed that the external force detection means is provided in both the data recording apparatus and the recording medium. In such a case, there are duplicate functions for protecting the recording medium from external forces such as dropping and impact, so that both external force detection means operate simultaneously and consume extra power. There was a problem such as. In particular, in portable imaging devices that operate with a battery of a limited capacity, it is required to extend the operation time as much as possible in consideration of user convenience. It is not desirable to consume unnecessary power by operating.

  In any of the conventional techniques described above, the type of the recording medium to be loaded is not identified by the data recording apparatus. In a data recording apparatus that can use a plurality of types of recording media such as a small hard disk, a magneto-optical disk, or a semiconductor memory, when the data recording apparatus includes an external force detection means, in order to protect a recording medium that is inherently low in resistance to external force The external force detection means existing in the above operates even when a recording medium having excellent resistance to external force is used. Therefore, if an external force that consumes unnecessary power and does not affect the recording medium with excellent resistance to external force is detected, unnecessary recording medium protection operation such as writing interruption is performed. There is a problem that the convenience of the user is impaired, such as the shooting being stopped at a point not intended by the user.

  In order to solve the above-described problems, the data recording apparatus, the data recording method, the data recording program, and the recording medium according to the present invention are provided in the data recording apparatus by determining the resistance against the external force of the recording medium that is a data recording target. The external force detection means is enabled or disabled as appropriate. Further, when the recording medium itself that is a data recording target includes an external force detection unit, the external force detection unit provided in the data recording apparatus is invalidated.

  According to the data recording apparatus, the data recording method, the data recording program, and the recording medium of the present invention, it is possible to determine the resistance against the external force of the recording medium that is a data recording target, and to appropriately use the external force detection means provided in the data recording apparatus. By enabling / disabling, the power consumption of the external force detection means provided in the data recording apparatus can be suppressed. This effect is particularly effective when the data recording apparatus is a portable imaging device that operates with a battery having a limited capacity. In addition, when the recording medium itself that is a data recording target includes an external force detection unit, it is possible to detect an external force that affects the read / write operation of the recording medium more appropriately than the external force detection unit included in the data recording apparatus. Therefore, by disabling the external force detection means provided in the data recording apparatus, it is possible to obtain a useful effect that it is possible to suppress the occurrence of unnecessary recording medium protection operation that is accompanied by interruption of data reading or writing.

  The data recording apparatus of the present invention is a data recording apparatus for reading / writing data from / to a detachable recording medium, the external force detecting means for detecting an external force that may cause damage to the recording medium, and the external force detection Switching means for enabling or disabling the means and recording medium identification means for identifying the type of the recording medium, and the switching means validates the external force detection means based on the identification result of the recording medium identification means. It is characterized by enabling or disabling.

  Further, in the above invention, the switching means invalidates the external force detection means when the recording medium identifying means identifies the recording medium as a semiconductor memory.

  In the above invention, the switching means validates the external force detection means when the recording medium identifying means identifies the recording medium as a disc-shaped recording medium.

  Further, in the above invention, the recording medium identifying means identifies the type of the recording medium by detecting attachment of the recording medium.

  In the above invention, the switching means validates the external force detection means by starting energization to the external force detection means.

  In the above invention, the switching unit invalidates the external force detection unit by stopping energization of the external force detection unit.

  In the above invention, the switching unit invalidates the external force detection unit when the recording medium identification unit identifies that the recording medium has a dedicated external force detection unit.

  In the above invention, the external force detection means detects the occurrence of external force such as vibration, impact, or drop. Preferably, the external force detection means includes an acceleration sensor.

  In the above invention, the recording medium identifying means uses identification information obtained from the recording medium.

  The data recording method of the present invention is a data recording method having an external force detection method for reading / writing data from / to at least one recording medium for recording data, and whether or not to perform the external force detection step. And a recording medium identification step for identifying the type of the recording medium, and the external force detection method is validated or invalidated by the switching step based on the identification result of the recording medium identification step. It is characterized by.

  Moreover, the program characterized by implement | achieving the data recording method of the said invention may be sufficient. Further, a computer-readable recording medium characterized by storing this program may be used.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of a data recording apparatus according to an embodiment in which the present invention is applied to a video movie compatible with both recording media of a semiconductor memory and a removable HDD.

  In the figure, an optical system 100 is an optical system for forming a subject image on a solid-state image sensor 105. The solid-state image sensor 105 detects an object image formed by the optical system 100 as an electrical signal (video signal). For example, a CCD (Charge Coupled Device) or the like is used. The video signal processing unit 110 is a unit that performs known video signal processing such as gain adjustment, noise removal, gamma correction, aperture processing, knee processing, and the like on the video signal obtained from the solid-state imaging device 105. Note that the video signal obtained via the solid-state image sensor 105 can be both a moving image and a still image. In the following description, the video signal is described as being taken, but the present invention is not limited to this.

  The microphone 115 is a microphone for converting sound into an electrical signal (sound signal), and the sound signal obtained from the microphone 115 is known sound signal processing such as removal of unnecessary noise or wind noise in the sound signal processing means 120. Is given. The digital signal processing unit 125 is a unit for compressing and multiplexing the video signal and the audio signal that have passed through the video signal processing unit 110 and the audio signal processing unit 120. The compressed and multiplexed data is temporarily stored in the buffer memory. 130.

  The card I / F unit 135a is a unit that transfers and writes data compressed and multiplexed by the digital signal processing unit 125 to the semiconductor memory card 145 electrically connected via the socket 140a. (Secure Digital) It has a shape specialized for card insertion, and other types of semiconductor memory cards or disc-shaped recording media cannot be inserted. The semiconductor memory card 145 is a detachable recording medium incorporating a semiconductor memory, for example, a flash memory (flash EEPROM). The card I / F means 135b is means for transferring and writing data compressed and multiplexed by the digital signal processing means 125 to the removable HDD 150 electrically connected via the socket 140b. It has a shape specialized for inserting a drive (registered trademark), and other disk-shaped recording media or semiconductor memory cards cannot be inserted.

  The operation means 155 is for operating a video movie, and includes a mode switching button for changing the mode to a shooting mode for shooting or a playback mode for playing back video data, and a power source (not shown). The button includes a power button for ON / OFF, a shooting button for shooting, a menu button for displaying a menu, a direction button that can indicate up / down / left / right, and a determination button. The display unit 160 is, for example, a small liquid crystal screen, and can display shooting data recorded on a recording medium, an image being shot, and various menus. The acceleration sensor module 165 is a semiconductor three-axis accelerometer that uses a change in electrical resistance due to, for example, distortion of a piezoresistive element, and can detect acceleration, inclination, impact, and the like. In addition, a signal amplifier circuit, an A / D converter, and the like are integrated, and the component is easy to control while being small.

  The system control unit 170 includes a CPU and a ROM in which a program is recorded. The system control unit 170 executes and stops the compression processing of the video signal and the audio signal in the digital signal processing unit 125, and transfers the buffer memory 130 to the card I / F unit 135a. Data transfer and start / stop of data writing to the semiconductor memory card 145 by the card I / F unit 135a, data transfer from the buffer memory 130 to the card I / F unit 135b, and data to the removable HDD 150 by the card I / F unit 8b Start / stop writing, start / stop acceleration detection module 165, accept operation request from operation means 155, transfer display data to display means 160, etc. When external force generation is detected The card I / F unit 135b is instructed to stop data transfer, and the card I / F unit 135b is used to execute a known recording medium protection unit such as retracting the magnetic head to the shipping zone with respect to the removable HDD 150. Instruct. The system bus 175 combines the digital signal processing means 125, the buffer memory 130, the card I / F means 135a, the card I / F means 135b, the system control means 170, the display means 160, the operation means 155, and the acceleration sensor module 165. Data can be transmitted and received between each other.

  In the video movie in the present embodiment, it is assumed that the user of the video movie uses the operation unit 155 and the display unit 160 to select which of the semiconductor memory and the removable HDD is used.

  The operation of the video movie corresponding to both the semiconductor memory and the removable HDD configured as described above will be described in detail below. First, a user of a video movie selects a recording medium to be used before shooting or reproducing shooting data. FIG. 2 shows an example of a menu screen displayed on the display means 160 when selecting a recording medium. The selection frame 200 is moved up and down using the operating means 155, and it is appropriately selected whether to use an SD card (semiconductor memory card) or a removable HDD (disk-shaped recording medium).

  When the recording medium is not inserted in the video movie, the acceleration sensor module 165 which is an external force detection means is invalidated and is in a stopped state where no power is supplied. Here, when a recording medium is inserted into the video movie, the system control means 170 identifies the type of the inserted recording medium. In this embodiment, since the semiconductor memory card 145 is inserted into the card I / F means 135a and the removable HDD 150 is inserted into the card I / F means 135b, it is determined which card I / F means the recording medium is inserted into. By detecting, the type of the recording medium can be identified. The system control means 170 indicates that the semiconductor memory card 145 has been inserted when a recording medium is inserted into the card I / F means 135a, and the removable HDD 150 indicates that the recording medium has been inserted into the card I / F means 135b. Recognize that it has been inserted. At this time, when the inserted recording medium is the removable HDD 150 and the selection result of the recording medium is also a removable HDD, the system control means 170 reads / writes from / to the removable HDD 150 having a low impact resistance. The module 165 is energized. After the energization is started, the acceleration sensor module 165 is reset and initialized, and the operation of the acceleration sensor module 165 is started. On the other hand, when the inserted recording medium is the semiconductor memory card 145, the acceleration sensor module 165 maintains a stopped state, that is, a state where no power is supplied.

  The overall flow of the above procedure will be described with reference to the flowchart shown in FIG. First, when insertion of a recording medium is detected in step S300, the process proceeds to step 310. In step 310, it is determined whether the recording medium inserted by the system control means 170 as the recording medium identification means is a semiconductor memory card or a removable HDD. If the inserted recording medium is a removable HDD, the process proceeds to step 320. In step 320, if the selection result of the recording medium performed before the recording medium is a removable HDD, the process proceeds to step 330, and in step 330, the energization of the acceleration sensor module 165 is started, reset, and initialized. Is called. With the above procedure, the operation of the acceleration sensor module 165 starts when the removable HDD having low impact resistance is used, and when the fall of the video movie or the like is detected by the acceleration sensor module thereafter, the system control means 170 will Through the I / F 135b, a known recording medium protection process is performed, for example, the writing or reading of the removable HDD 150 is stopped and the magnetic head in the removable HDD 150 is retracted to the shipping zone. It should be noted that step S310 and step S320 can be performed in the reverse order. In this procedure, the user of the video movie decides whether to operate or stop the acceleration sensor module 165 in consideration of the result of selecting the recording medium using the operation unit 155 and the display unit 160. However, the present invention is not limited to this. There is no need, and when there is no recording medium selection menu as shown in FIG. 2, step S320 in FIG. 3 may be omitted.

  Next, the user of the video movie selects a recording medium to be used using the menu shown in FIG. 2 with either or both of the semiconductor memory card 145 and the removable HDD 150 inserted in the video movie. The case will be described. Since the recording medium has already been inserted, the system control means 170 determines the current video movie state such as whether the semiconductor memory card 145 is inserted, the removable HDD 150 is inserted, or both recording media are inserted. Holding. At this time, if the user of the video movie selects the removable HDD using the menu shown in FIG. 2, if the removable HDD 150 has been inserted and the acceleration sensor module 165 has stopped, the video data to the acceleration sensor module 165 is displayed. Energize, reset and initialize. When the user of the video movie selects a semiconductor memory card using the menu shown in FIG. 2, if the operation of the acceleration sensor module 165 is stopped, the energization of the acceleration sensor module 165 is stopped.

  The overall flow of the above procedure will be described with reference to the flowchart shown in FIG. First, in step S400, the user of the video movie selects a recording medium to be used using the menu shown in FIG. Then, it progresses to step S410 and branches to step S420 or step S430 according to the result of step S400 at step S410.

  If a removable HDD has been selected in step S400, the process proceeds from step S410 to step S420. In step S420, it is determined whether the removable HDD 150 has been inserted. If it has been inserted, the process proceeds to step S440. In step S440, it is determined whether or not the acceleration sensor module 165 is stopped. If it is stopped, the process proceeds to step S450, energization of the acceleration sensor module 165 is started, reset and initialization are performed, and the acceleration sensor module is detected. The operation of 165 is started.

  On the other hand, when the semiconductor memory card is selected as the recording medium in step S400, the process proceeds from step S410 to step S430. In step S430, it is determined whether or not the acceleration sensor module 165 is in operation. If it is in operation, the process proceeds to step S460, and energization of the acceleration sensor module 165 is stopped.

(Embodiment 2)
FIG. 5 is a block diagram showing a configuration of a data recording apparatus in an embodiment in which the present invention is applied to a digital camera in which both a semiconductor memory card and a removable HDD can be inserted into the same socket. In FIG. 5, the same blocks as those of the video movie described in Embodiment 1 are given the same reference numerals, and description thereof is omitted.

  In FIG. 5, a socket 500 is a socket into which both a semiconductor memory card and a removable HDD can be inserted, for example, a compact flash (registered trademark) (hereinafter referred to as CF) card slot. The card I / F unit 510 is a unit that transfers and writes the data compressed and multiplexed by the digital signal processing unit 125 to the recording medium 520 electrically connected via the socket 500. In the embodiment, the card I / F means conforms to the CF + standard. CF + is an extension of the CF standard that realizes I / O cards other than the compact flash (registered trademark), which is a semiconductor memory card, with a CF card. Communication cards such as GPS receivers and Bluetooth, microdrives, etc. It corresponds to this standard. When the recording medium 520 is inserted, the card I / F unit 510 compliant with the CF + standard issues an identification device (IDENTIFY DEVICE) command defined in the ATA standard to the recording medium 520, thereby recording the recording medium 520. Various information about the recording medium 520 such as the model name of the recording medium and the supported transfer mode can be acquired. In the present embodiment, an operation when a compact flash (registered trademark) is inserted into the card I / F means 510 and an operation when a micro drive is inserted will be described.

  First, when a compact flash (registered trademark) as the recording medium 520 is inserted into the socket 500, the card I / F means 510 sends an IDENTIFY DEVICE command defined by the ATA standard to the compact flash (registered trademark). ), The model number of the recording medium 520 consisting of a 40-byte ASCII code is acquired, and notified to the system control means 170 via the system bus 175. Based on the model number obtained from the card I / F means 510, the system control means 170, which recognizes that the inserted recording medium 520 is a CompactFlash (registered trademark), operates the acceleration sensor module 165 while using this recording medium. It is determined that it is not necessary to turn on the power, and the power supply to the acceleration sensor module 165 is stopped.

  Next, when a removable HDD as the recording medium 520 is inserted into the card I / F means 510, the card I / F means 510 sends an IDENTIFY DEVICE command defined in the ATA standard to a compact flash (registered). The model number of the recording medium 520 consisting of a 40-byte ASCII code is acquired and notified to the system control means 170 via the system bus 175. The system control means 170 that recognizes that the inserted recording medium 520 is a removable HDD from the model number notified from the card I / F means 510 starts the operation of the acceleration sensor module 165.

  In the present embodiment, the type of the recording medium 520 is identified by the IDENTIFY DEVICE command defined in the ATA standard. However, the structure of the CF card, which is called the CIS information, is collected from the CF card. Even if the type of the recording medium 520 is identified, the same effect can be obtained. As shown in FIG. 6, the CIS information is composed of a tuple composed of three pieces of information: tuple code, tuple link, and tuple data. A CISTPL_VERS_1 tuple having a tuple code value of 0x15 stores version information, manufacturer name, and product information. For example, when the recording medium 520 is inserted, a CISTPL_VERS_1 tuple of CIS information is acquired, and the type of the recording medium 520 can be identified from the manufacturer name and product information.

  In both of the above embodiments, the acceleration sensor module is enabled when it is decided to read / write from / to the disk-shaped recording medium (removable HDD in the embodiment). For example, when reading / writing to the recording medium has not occurred, the power supply to the acceleration sensor module is stopped, and when the reading / writing to the recording medium occurs, the power supply to the acceleration sensor module is started to detect acceleration. You may make it perform.

  In the above-described two embodiments, the acceleration sensor module is made effective when it is decided to read / write from / to the disk-shaped recording medium. However, the present invention is not limited to this. If the identification reveals that the disc-shaped recording medium itself is provided with external force detection means such as an acceleration sensor module, the external force detection means provided in the data recording device such as a video movie or digital camera is invalidated. You may let them. Since the external force detection means provided in the data recording device does not know what manufacturer and what type of recording medium is used, the threshold for determining that the external force has been detected must be lowered. On the other hand, the external force detection means provided in the recording medium itself appropriately sets a threshold value for determining that an external force that damages the recording medium is detected in consideration of the impact resistance of the recording medium and the control capability of the magnetic head. can do. Therefore, when the recording medium itself is provided with an external force detection means, the external force detection means provided in the data recording device is invalidated so that an external force that does not affect the recording medium is generated against the recording medium. Thus, it is possible to avoid performing known recording medium protection operations such as interruption of reading and writing and movement of the magnetic head to the shipping zone, and recording is suddenly interrupted due to erroneous determination of the external force detection means while using the imaging device. It becomes possible to reduce the probability of occurrence of defects.

  Further, each of the above-described embodiments is realized by a program stored in a ROM existing in the system control unit 170.

  In both of the above embodiments, the energization is stopped as a method for invalidating the acceleration sensor module which is the external force detection means. However, the present invention is not limited to this. For example, the operation of the acceleration sensor module is temporarily performed. When there is a power saving mode to be stopped, the mode may be shifted to the power saving mode.

  In the above-described two embodiments, when the acceleration sensor module 165 is operating, it goes without saying that the operation of the acceleration sensor module 165 may be stopped when the removable HDD is removed.

  Each of the above-described embodiments has been described on the assumption that a portable video movie and a digital camera are the target. However, a notebook computer or the like, which is often carried, is a disk-shaped recording medium and a semiconductor memory. Needless to say, any of them can be applied to various devices that can be used.

  As described above, according to the present invention, data recording can be performed by determining resistance to external force of a recording medium that is a data recording target and appropriately enabling or disabling external force detection means provided in the data recording apparatus. Since the power consumption of the external force detection means provided in the apparatus can be suppressed, it is useful for power saving of a data recording apparatus that needs to protect the recording medium from an external force such as a drop or an impact. It is suitable for portable data recording devices such as movies, laptop computers, and digital cameras that operate with a limited capacity battery. Further, according to the present invention, when the recording medium itself that is a data recording target includes the external force detection unit, the external force detection unit included in the data recording apparatus is invalidated to interrupt the data reading and writing. It also has the usefulness of being able to suppress the occurrence of unnecessary recording medium protection operations.

1 is a block diagram showing a configuration of a data recording apparatus according to Embodiment 1 of the present invention. The figure which shows the recording medium selection screen of the data recording device in Embodiment 1 7 is a flowchart showing a procedure for determining whether to enable / disable an acceleration sensor module when a recording medium is inserted into the data recording apparatus according to the first embodiment. 7 is a flowchart showing a procedure for determining whether to enable / disable an acceleration sensor module when a recording medium is selected by the data recording apparatus according to the first embodiment. The block diagram which shows the structure of the data recording device in Embodiment 2 Structure diagram of tuple information constituting CIS information used in data storage device in embodiment 3 Block diagram showing the configuration of a conventional data recording apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Optical system 105 Solid-state image sensor 110 Video | video signal processing means 115 Microphone 120 Audio | voice signal processing means 125 Digital signal processing means 130 Buffer memory 135a, 135b Card I / F means 140a, 140b Socket 145 Semiconductor memory card 150 Removable HDD
165 Acceleration sensor module 170 System control means 175 System bus

Claims (13)

A data recording device for reading / writing data from / to a removable recording medium,
An external force detection means for detecting an external force that may cause damage to the recording medium;
Switching means for enabling or disabling the external force detection means;
Recording medium identifying means for identifying the type of the recording medium,
The data switching apparatus, wherein the switching unit validates or invalidates the external force detection unit based on an identification result of the recording medium identification unit. 2. The data recording apparatus according to claim 1, wherein the switching unit invalidates the external force detecting unit when the recording medium identifying unit identifies the recording medium as a semiconductor memory. 2. The data recording apparatus according to claim 1, wherein the switching unit validates the external force detecting unit when the recording medium identifying unit identifies the recording medium as a disc-shaped recording medium. . The data recording apparatus according to claim 1, wherein the recording medium identifying unit identifies the type of the recording medium by detecting attachment of the recording medium. The data recording apparatus according to claim 1, wherein the switching unit validates the external force detection unit by starting energization of the external force detection unit. The data recording apparatus according to claim 1, wherein the switching unit invalidates the external force detection unit by stopping energization of the external force detection unit. 2. The data according to claim 1, wherein the switching unit invalidates the external force detection unit when the recording medium identification unit identifies that the recording medium has a dedicated external force detection unit. Recording device. 2. The data recording apparatus according to claim 1, wherein the external force detection means detects the generation of an external force such as vibration, impact, or drop. The data recording apparatus according to claim 8, wherein the external force detection means includes an acceleration sensor. The data recording apparatus according to claim 1, wherein the recording medium identifying unit uses identification information obtained from the recording medium. A data recording method having an external force detection method for reading and writing data to at least one recording medium for recording data,
A switching step for switching whether or not to perform the external force detection step;
A recording medium identifying step for identifying the type of the recording medium,
A data recording method, wherein the external force detection method is validated or invalidated by the switching step based on an identification result of the recording medium identification step. The program which implement | achieves the data recording method of Claim 11. A computer-readable recording medium storing the program according to claim 12.

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