JP2010044857A - Disk device and disk reading method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology by which disk related information can be obtained in a short period of time and a starting time can be shortened during processing restarting after replacement of a disk and after interruption of a power source, in a disk device. <P>SOLUTION: Effectiveness of management information recorded in a disk is discriminated, the discrimination result is stored in a storing means which can store it even in the power source interruption state, when it is recognized that the stored discrimination result information is effective for an inserted disk when a power source is applied, prior to recording or playback operation, management information is read from a part of a plurality of recording areas of the disk. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for reading management information of a disk in a disk device.

  For recording media such as CDs / ROMs and other playback-only discs and optical discs that are mainly used for recording audiovisual information, a defect management area is not prepared on the recording media in advance. Accordingly, a processing method for defects in the medium is determined. In contrast, optical discs such as DVD-RAM and rewritable discs such as magnetic discs, which focus on ensuring a certain level of data reliability by standardizing the processing method for defects, have sectors such as A defect is checked in a predetermined unit, and an address of a sector or the like including the detected defect is recorded on a predetermined area of the disc and provided to the market. The recording method of the defect management information is determined by the standard for the disc. For example, rewritable discs such as ISO / IEC10089 and 13549 standards have two pieces of defect management information consisting of information on defective sectors and their replacement sectors on the inner and outer edges of the user area in the disc. There are a total of four pieces of the same management information in the peripheral area. This area is called DMA (Defect Management Area). In the following description, the defect management information is referred to as first management information. Further, in the rewritable discs such as the ISO / IEC10089 and 13549 standards, file management information UDF (Universal Disc Format) including file format information relating to recorded information is sent to the inner and outer edges of the user area on the disc. Have two. In the following description, the file management information is referred to as second management information. In the conventional optical disc apparatus for recording or reproducing information with respect to the disc, the first disc recorded in the two areas of the inner peripheral end and the outer peripheral end of the disc when the apparatus is turned on and the disc is inserted. After all the management information is read, all the second management information recorded in the two areas of the inner peripheral end and the outer peripheral end is read. The reason why information of the same content is recorded in a plurality of areas separated from each other in this way is to improve the reliability of the recording itself and to manage the failure (fingerprint, dust, scratch) that may occur after recording. This is to increase the reproducibility of information.

  In the rewritable disc in which the medium management information area is provided on the disc inner periphery side and the disc outer periphery side as described above, when all the first management information and the second management information are read by the above method, Since the optical head must be reciprocated at least once from the circumferential side to the outer circumferential side, it takes a long time to start recording or reproducing information. This is particularly noticeable in an optical disk apparatus in which the moving speed of the head is slower than that of a magnetic disk. Examples of techniques related to this include those described in Japanese Patent Application Laid-Open Nos. 11-25575 and 10-269709. In Japanese Patent Laid-Open No. 11-25575, when it is determined that the medium is rewritable after the power is turned on or after the medium is inserted, information on the inner circumference DMA is read, and then a test pattern is recorded and reproduced in the inner circumference Drive Test Zone. A technique is described in which the recording power is adjusted, the pickup is moved to the outer periphery Drive Test Zone, the recording power is adjusted in the same manner, the information on the outer periphery DMA is read, and the starting process is performed. Japanese Patent Laid-Open No. 10-269709 discloses a replacement assignment destination of a defective part in a magnetic disk device using a magnetic disk that cannot be replaced, in order to shorten the access time to data and eliminate the consumption of a backup battery. In addition, the correspondence information between the defective part and the replacement destination is stored in a rewritable nonvolatile memory, and when there is an instruction to read or write the range including the defective part from the host device, the sector data or A technique for reading and writing management information is described.

  On the other hand, in a portable video camera or the like, there are many cases where it is desired to record sudden events suddenly, and the demand for shortening the startup time is extremely high. For this reason, it is required to shorten the processing time for management information and the like to speed up the activation. In order to meet this requirement, in the conventional disk device, when the optical disk is inserted, the first management information (medium management information) of the optical disk is read and stored in D / RAM or the like before the optical disk is ejected. While the power is on, the first management information is held in the D • RAM or the like. Thus, when recording / reproduction is not requested for a long time, even if the disk rotation is stopped in the power saving mode, when the recording / reproduction is resumed, the first management information held is used. Recording or reproduction can be performed, and the first management information on the disc need not be read again. However, when the apparatus power is turned off, the management information stored in the D / RAM or the like is lost.

Japanese Patent Laid-Open No. 11-25575 Japanese Patent Laid-Open No. 10-269709

  As described above, with the technique for storing the first management information (medium management information) in the D / RAM or the like, the first management information can be held only when the apparatus power is turned on. When the period expires, the first management information previously held is lost. Accordingly, when the recording / reproducing operation is performed by turning the apparatus power off and then on again, even if the disk is not inserted / removed, a predetermined management information reading operation is performed again over time from the beginning. There is a need. Further, the technique disclosed in Japanese Patent Laid-Open No. 10-269709 does not take into account the insertion / removal of a disk, and cannot be applied to a disk device that replaces a disk. Further, since the technique described in the publication performs rewriting using a nonvolatile memory having a low upper limit of the number of rewrites, there is a risk that the memory life is shortened. In addition, when replacing the nonvolatile memory with a battery-driven CMOS memory or the like and trying to store the replacement information of the sector including the defect in the disk and the data stored therein, the capacity is about 10 MB or more. For this purpose, a large driving battery is required, which makes it difficult to reduce the size and price. Also in the technique described in the publication, even when the process is resumed after disk replacement or suspension as described above, it remains a problem to shorten the management information acquisition processing time and the startup time.

  In the prior art, for example, when a disk is already inserted into the apparatus when the apparatus power is turned on and there is no information such as management information related to the disk, the management information is read in a predetermined entire process. Management information necessary for recording or reproduction must be taken out of the disc. However, if information such as management information related to the disk has already been acquired on the disk device side and the acquired information is reliable, the acquired information can be used. If the acquired information is not reliable, information such as management information of the disk needs to be read and confirmed at least once. That is, it is necessary for the disk device to acquire disk-related information that is a basis for reliability. Necessary information related to the disc is (1) Is the inserted disc specified? (2) Has the necessary management information related to the identified disk been acquired on the device side? (3) There are three possible points: whether the acquired management information is highly reliable. Since the memory such as the control system is in an operating state in a state where the apparatus power is kept on, all the information (1) to (3) is retained, and there is no problem. However, if the device power is once turned off and then turned on again, it is the same disc that was inserted when the device power was turned off, and whether information about the inserted disc is retained. If it is held, it is necessary to confirm in a short time when the power is turned on again whether the information is reliable. In view of the above-mentioned conventional situation, the problem of the present invention is that in a disk device, even when processing is restarted after disk replacement or power-off, reliable information about the inserted disk is acquired in a short time and started. It is to shorten the time and allow the recording or reproducing operation to be started quickly after the power is turned on. An object of the present invention is to provide a technique capable of solving such problems.

  In order to solve the above-described problems, in the present invention, basically, in the disk device, the storage means capable of determining the validity of the management information recorded on the disk and storing the determination result even in the power-off state. When the power is turned on and the stored determination result information is valid for the inserted disc, the management information is obtained from a part of the plurality of recording areas of the disc prior to the recording or reproducing operation. To read. In the disk device, the insertion / removal of the disk is detected or monitored, and the result of the insertion / removal detection is stored in a storage means that can be stored even when the power is turned off. When the insertion / extraction of the disc is detected, effective management information is read from a part of the plurality of recording areas of the disc. Further, in the disk device, the validity of the management information of the disk is determined for the management information of a part of the recording area, and the result of the determination is stored in a storage means that can be stored even when the power is turned off. When the stored determination result information is also valid for the inserted disc, the management information of the part of the valid area is read to start the recording or reproducing operation. Specifically, in the disc device, (1) discriminating means for discriminating the validity of the disc management information at the time of signal recording or reproduction, and a storage capable of storing the discrimination result even in a power-off state And a control means for selecting a mode for reading the management information from the disc based on the discrimination result information, and when the stored discrimination result information is valid for the inserted disc, the recording or reproducing operation is performed. Prior to this, the management information is read from a part of a plurality of recording areas of the disc. (2) Detection means for detecting presence / absence of a disc mounted, determination means for determining the effectiveness of management information in recording or reproduction, and storage means capable of storing the result of the determination even in a power-off state And a control means for selecting a mode for reading the management information from the disk based on the determination result information, and when the power is turned on, the loading of the disk is detected, and the stored determination result information is inserted into the inserted disk. Is effective, the management information is read from a part of the plurality of recording areas of the disc prior to the recording or reproducing operation. (3) Insertion / removal detection means for detecting insertion / removal of a disk, storage means for storing the result of the insertion / removal detection even in a power-off state, and reading of management information of the disk based on the stored insertion / removal detection result information Control means for selecting a mode, and when the insertion / extraction of the disc is not detected, the management information is read from a part of the plurality of recording areas of the disc prior to the recording or reproducing operation. . (4) Detection means for detecting the presence / absence of a disc loading, discriminating means for discriminating the effectiveness of disc management information at the time of recording or reproduction, insertion / removal detection means for detecting insertion / removal of the disc, Sometimes, a storage means capable of storing the insertion / extraction detection result and the determination result, and a control means for selecting the management information reading mode based on the stored insertion / extraction detection result and the determination result, At the time of power-on, when the disc is detected and the stored discriminating result information is valid for the inserted disc and the insertion / removal of the disc is not detected, a plurality of discs are recorded prior to the recording or reproducing operation. The management information is read from a part of the recording area. (5) In the above (4), the detection means, the discrimination means and the control means are operated by a first power supply, the insertion / extraction detection means and the storage means are operated by a second power supply, and the first power supply When the power is turned on, the management information reading mode is selected. (6) Detection means for detecting presence / absence of a disc, discrimination means for discriminating the effectiveness of disc management information in recording or reproduction for management information recorded in a plurality of recording areas of the disc, and the discrimination The storage means that can be stored even when the power is turned off, and the control means for selecting the read mode of the management information from the disk based on the stored determination result information, When loading of the disc is detected and the stored discrimination result information is also valid for the inserted disc, the management information of a part of the validated area is read and a recording or reproduction operation is started. It is set as the structure made to do. (7) Detection means that operates with a first power source to detect the presence or absence of the disc, and discriminating means that operates with the first power source to determine the effectiveness of the disc management information in recording or reproduction. Storage means that operates with a second power supply and stores the result of the determination, and control means that operates with the first power supply and selects the management information reading mode based on the stored determination result information. When the first power supply is turned on, the loading of the disk is detected, and when the stored determination result information is valid for the inserted disk, the first area of the disk and the first area The management information is read from either one of the two areas, and when it is determined that the information is not valid, the management information is read from both the first area and the second area. (8) Detection means for detecting whether or not a disk is mounted, insertion / removal detection means for detecting insertion / removal of the disk, storage means capable of storing a result of the insertion / removal detection even in a power-off state, and the storage Control means for selecting the management information reading mode based on the inserted / removed detection result information, and when the disk is detected when the power is turned on, and when the insertion / removal of the disk is not detected, The configuration is such that effective management information is read from a part of a plurality of recording areas. (9) In any one of (1) to (8), the plurality of areas in which management information is recorded are configured to be divided into an inner peripheral portion and an outer peripheral portion of the disc. . (10) In any one of (1) to (8), the plurality of areas in which management information is recorded are four areas, and control is performed so as to read the management information from one of these areas. The configuration. (11) In any one of (1) to (8), the management information includes first management information for managing the state of the disc itself, and data information recorded on the disc for reproduction. The first management information and the second management information are recorded separately in an inner area and an outer area of the disc, respectively. The first and second management information are controlled to be read from this area. (12) Recording means for recording the disc management information in the first and second areas of the disc, discrimination means for discriminating the validity of the recorded management information, and the result of the discrimination in the power-off state Storage means storable at the time of the recording and control means for selecting a mode for reading the management information from the disk based on the stored determination result information, and the stored determination result information is stored in the inserted disk. Is valid, the management information is read from either the first area or the second area prior to the recording or reproducing operation of the signal, and when it is determined that the management information is not valid, The management information is read from both the first and second areas. (13) In any one of (1) to (8), the signal to be recorded or reproduced is an information signal from a camera imaging device. In addition, as an information processing terminal device for processing received information, (14) an information transmission interface, information processing means for processing information, and management information having the same contents are multiplexed and recorded in a plurality of areas. A disc device that records and / or reproduces the processed information with respect to the disc, and a display unit, wherein the disc device uses the management information for recording or reproducing the signal. Discriminating means for discriminating the discriminating power, storage means for storing the discriminating result even when the power is turned off, and when the stored discriminating result information is also valid for the inserted disc, the recording or reproducing Prior to the operation, a control means for controlling the management information to be read from a part of a plurality of recording areas of the disc is provided. (15) Either an information transmission interface, information processing means for processing information, or recording or reproduction of the processed information on a disc in which management information of the same content is multiplexed and recorded in a plurality of areas A disk device that performs one or both of the above and a display means, wherein the disk device detects insertion / removal detection means for detecting the insertion / removal of the disk, and shows the result of the insertion / removal detection even when the power is off. Storage means capable of storing, and control means for controlling to read effective management information from a part of a plurality of recording areas of the disc when the insertion / removal of the disc is not detected as a result of the insertion / removal detection. It is set as the structure which consists of. Further, as a reading control method when reading the management information of the disc in the disc device, (16) a step of reading the management information prior to the signal recording or reproducing operation and a step of determining the validity of the read management information. Storing the determination result in a storage means that can be stored even in a power-off state, determining whether the stored determination result information is also valid for the inserted disk, and the determination result When the stored determination result information is also valid for the inserted disc, the management information is read from a part of the plurality of recording areas of the disc, Perform reading control. (17) A step of detecting insertion / removal of a disk, a step of storing the detection result in a storage means that can be stored even in a power-off state, and the stored insertion / removal detection result information is such that the insertion / removal of the disk is not detected. In some cases, the management information reading control is performed through a step of reading effective management information from a part of a plurality of recording areas of the disc. The control means selects the management information reading mode as the short time mode when the apparatus power is turned on based on the stored disk insertion / removal detection result or the disc management information discrimination result, and shortens the startup time. .

  According to the present invention, in the disk device, it is possible to shorten the startup time by shortening the management information reading time, and to quickly start the recording or reproducing operation.

It is a figure which shows the 1st Example of this invention. FIG. 2 is an explanatory diagram of a data structure of management information in the device disk of FIG. 1. It is a figure which shows the example of a procedure until the recording / reproducing start in the apparatus of FIG. It is a figure which shows the example of a procedure of reading control of the management information in the apparatus of FIG. It is a figure which shows the other example of a procedure of the reading control of the management information in the apparatus of FIG. It is a figure which shows the other example of a procedure of the reading control of the management information in the apparatus of FIG. It is the flowchart which unified the procedure of FIGS. It is a figure which shows the example of 1st management information reading mode and 2nd management information reading mode. It is a figure which shows the 2nd Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1-7 is explanatory drawing of the 1st Example of this invention. FIG. 1 is a structural example diagram of a camera-integrated recording / reproducing apparatus as a first embodiment of the present invention, FIG. 2 is an explanatory diagram of the data structure of management information in a disk as a recording medium of the apparatus of FIG. FIG. 4 is a flowchart showing an example of a procedure for a preparatory operation until the start of recording / reproduction in the apparatus of FIG. 1, FIG. 4 is a flowchart showing an example of a procedure for reading control of management information in the apparatus of FIG. 1, and FIG. FIG. 6 is a flowchart showing still another procedure example of management information reading control in the apparatus of FIG. 1, and FIG. 7 is a flowchart of FIG. It is the flowchart which unified the procedure of FIG.

  In FIG. 1, 1 is a microphone, 2 is an audio input processing circuit, 3 is a lens unit, 4 is a CCD as an image sensor, 5 is a camera video signal processing circuit, 6 is a driver for driving the lens unit 3, and 7 is an image. Compression / decompression processing circuit for compressing / decompressing signals and audio signals, 8 an audio output circuit, 9 an audio output terminal, 10 an LCD (liquid crystal display) as display means, 11 an image output terminal, and 12 an image display / Output processing circuit, 13 is a D-RAM, 14 is a control microcomputer on the camera side, 15 is a flash memory (F-ROM), 16 is a built-in battery, 17 is an insertion / removal monitoring means for detecting or monitoring disk replacement, 18 is EEP-ROM as a nonvolatile memory, 19 is an interface (I / F) circuit, 20 is a power switch of the apparatus, 21 is a charging circuit, 22 External power input terminal, 23 is a battery, 24 is a DC-DC converter as a power supply circuit, 25 is a disk as a recording medium, 26 is a spindle motor that drives the disk 25 to rotate, and 27 is an information signal recording or recording on the disk 25 A pickup for performing reproduction, 28 is a reproduction circuit, 29 is a signal / control processing circuit for processing a recording signal or reproduction signal, 30 is a D-RAM, and 31 is a feed motor for moving the pickup 27 in a substantially radial direction of the disk 25. , 32 is a recording circuit, 33 is an S-RAM, 34 is an F-ROM as a flash memory, 35 is an EEP-ROM as a nonvolatile memory, 36 is a spindle motor 26 drive, a feed motor 31 drive, and a pickup 27 for performing focus control and tracking control of the objective lens. Actuator driver to perform the driving of Chueta (not shown), 37 is a control microcomputer of the recording and reproducing unit, 38 a camera unit, 39 output unit, 40 control unit, 41 is a recording and reproducing unit. In the above configuration, each memory is used in accordance with its characteristics. That is, the D-RAMs 13 and 30 temporarily store data such as processing data of the compression / decompression processing circuit 7 and processing data of the control microcomputer 14. The S-RAM 33 temporarily stores work data for the control microcomputer. The flash memory 15 stores a program for operating the control microcomputer 14 and the like. The EEP-ROM 35 stores state information such as the mechanical system. Both the flash memory and the EEP-ROM are nonvolatile, electrically recordable and erasable memories. The flash memory is used for storing large-capacity information, and the EEP-ROM is used for storing small-capacity information.

  In the camera unit 38, the image information is converted into an electric signal by the CCD 4 as an imaging sensor via the lens unit 3 driven by the driver 6, and is converted into a video signal by the camera video signal processing circuit 5. On the other hand, the audio is converted into an audio signal by the audio input processing circuit 2 via the microphone 1. In the output unit 39, the video signal and the audio signal are converted into a digital video / audio compressed signal by the compression / expansion processing circuit 7. As a compression method, an MPEG method that handles moving images, a JPEG method that handles still images, or the like is used. The audio signal from the compression / decompression processing circuit 7 is output to the audio output terminal 9 via the audio output circuit 8. The video signal is displayed on the LCD 10 as a display means via the video display / output processing circuit 12 and is output from the video output terminal 11.

  The control unit 40 operates when the power switch 20 is turned on and a required voltage and current are supplied from each power source to each means. The control microcomputer 14 controls the lens unit 3 via the driver 6 and captures the subject as an image on the CCD 4 as the imaging sensor. Further, the control microcomputer 14 controls the compression / decompression processing circuit 7 to compress a moving image or a still image into a digital signal and temporarily store it in the D-RAM 13. These signals are sent to the signal / control processing circuit 29 of the recording / reproducing unit 41 via the interface circuit 19. Further, the power supply process of the camera unit 38 is performed by monitoring the charging circuit 21 to grasp the power supply state or controlling the switch circuit 20. The built-in battery 16 is used as a power source for monitoring backup information such as date and insertion / removal monitoring means 17. The insertion / removal monitoring means 17 is a means for detecting or monitoring the replacement of the disk 25. As a specific configuration, for example, there is a structure in which a switch for detecting the presence or absence of a disk is provided in an insertion portion or the like. The detection switch may be one that outputs an electric signal as a detection signal in a state where power is supplied from a battery or the like, or a state of a mechanical element having a storage function is supplied with a device power supply. It may sometimes be configured to detect with an electrical sensor and transmit information to the control means. In the latter case, it is not necessary to supply power by the battery.

  The recording / playback unit 41 converts the moving image or still image information input from the interface circuit 19 into a recording format corresponding to the disk 25 by the signal / control processing circuit 29 and the D-RAM 30, and the recording circuit 32 and the pickup 27. To be recorded on the disk 25. The relative position between the disk 25 and the pickup 27 is determined by reproducing the pickup 27 in a time division manner, detecting position information written in advance from the disk 25 via the reproduction circuit 28, and the signal / control processing circuit 29. Then, processing is performed by the control microcomputer 37, and an actuator (not shown) provided in the spindle motor 26, the feed motor 31 and the pickup 27 is driven via the actuator driver 36. The S-RAM 33 and the flash memory 34 perform temporary storage of operation data of the control microcomputer 37 and storage of programs and the like. The nonvolatile memory 35 stores calculation data and the like.

  The above operation is performed when information signals are recorded, but in the case of reproduction, operations opposite to these are performed. That is, information is detected from the disk 25 via the pickup 27 and the reproduction circuit 28, the recording format corresponding to the disk 25 is demodulated by the signal / control processing circuit 29 and the control microcomputer 37, and compression / decompression is performed via the interface circuit 19. Returning to the processing circuit 7, the compressed video signal and audio signal are decompressed here, via the video display / output processing circuit 12 and the audio output circuit 8, the display means 10, the audio output terminal 9 and the video output terminal. 11 is output. Furthermore, the apparatus of the present embodiment has an external power input terminal 22 as a power source, and can be supplied with power from the outside. In addition, the battery 23 can be charged by driving the charging circuit 21 with the external power supply via the external power supply input terminal 22. When the external power supply is supplied, the external power is converted into a required voltage by the power supply circuit 24 and supplied to each block. When the external power supply is not connected, the power from the battery 23 is supplied via the power supply circuit 24. Supply to each block. The disk 25 includes, for example, a DVD / ROM as a reproduction-only disk, a DVD / R as a one-time write-once disk, a DVD / RW and a DVD-RAM as a rewritable disk.

  FIG. 2 shows an example of the data structure of management information in a disk as a recording medium of the apparatus of FIG. In this example, defect management information and file management information serving as management information are recorded separately in an inner area and an outer area of the disc. In each area, defect management information having the same content and file management information having the same content are recorded. For example, in the case of a DVD-RAM disc, two defect management information recording areas and one file management information recording area are provided in the inner peripheral area, and two defects are also provided in the outer peripheral area. A management information recording area and one file management information recording area are provided. The defect management information recorded in the four defect management information recording areas has the same contents, and the file management information recorded in the two file management information recording areas has the same contents. In this way, by placing management information having the same contents in a plurality of locations (plural areas), the reliability of data reproduction is increased, and the recording and reproduction due to fingerprints and dust are less likely to be affected. When recording or reproduction is performed with a disc having such a configuration, defect management information (first management information) at the four locations (four recording areas) relating to the disc is read prior to the recording or reproduction operation. There is a need. The defect management information is read as preparation for using the disk by the disk device. Hereinafter, a state in which the disk device is ready is referred to as a READY state. “READY” shown in FIGS. 3, 4, 5 and 7 means this state. In a normal system, after reading READY, the file management information (second management information) at two locations (two recording areas) in the disc is read when the file system is read by a command from the host system. go.

  FIG. 3 shows an example of the procedure of the preparation operation up to the start of recording / reproduction in the apparatus of FIG. In FIG. 3, (1) the apparatus is turned on by the operation switch 20 in step ST50, (2) it is determined in step ST51 whether a disk is inserted in the apparatus, and (3) the disk is inserted. If so, the spindle motor 26 is rotated in step ST52. (4) After the rotational speed of the spindle motor reaches a predetermined value, various offsets such as the pickup 27 and the actuator driver 36 are adjusted in step ST53. (5) Then, in step ST54, the laser on the pickup 27 is emitted. (6) In step ST55, the focus direction is pulled in, and the laser beam is narrowed down on the disk recording surface to form a minute spot. (7) Next, in step ST56, the optical spot is controlled in the radial direction of the disk, and the tracking control for positioning the track on the disk is performed. (8) After adjusting the gain of the focus and tracking control in step ST57, (9) reading the first inner management information (DMA) at two locations in step ST58. (10) In step ST59, a recording test is performed on the inner periphery, (11) seek is performed on the outer periphery in step ST60, and (12) a recording test is performed on the outer periphery in step ST61. (13) In step ST62, the first management information at two locations on the outer periphery is read. Since the preparation sequences of (1) to (13) above are a method of reproducing all defect management information (first management information) in the inner peripheral area and the outer peripheral area, a highly reliable reproduction result can be obtained. However, the startup time until the start of playback becomes longer. For this reason, when a highly reliable result has already been obtained, it can be considered as an improvement measure to omit the overlapping part of the reading process of the first management information and to shorten the time.

  FIG. 4 is a flowchart showing an example of a procedure of management information reading control in the apparatus of FIG. In FIG. 4, (1) the power of the disk device is turned on for the first time by the operation switch 20 in step ST70, and (2) the presence / absence of a disk in the disk device is determined in step ST71. If it is determined that there is a disc, (3) the processing from step ST52 to step ST62 in FIG. 3 is performed (step ST72 to step ST74). Hereinafter, the management information reading operation for reading all the first management information is referred to as a first management information reading mode. (4) Thereafter, when there is a power-off request in step ST75, (5) in step ST76, the validity of the first management information is determined, and the result information is, for example, the internal battery 16 Are stored in the memory in the control microcomputer 14 to which the power is supplied or in the nonvolatile memory 35, and (6) the power is turned off in step ST77. Here, the validity of the first management information is determined to be valid when, for example, the information of all the multiple recorded areas read in the first management information reading mode is the same, and any information is If they do not match, it is determined to be invalid. (7) In step ST78, until the disk device is turned on again by the operation switch 20, the control microcomputer 14 supplied with power by the built-in battery 16 causes the insertion / extraction monitoring means 17 to execute the disk 25. Detects insertion / removal. When the insertion / removal monitoring means 17 detects the insertion / removal of the disk 25, information indicating insertion / removal is stored in the nonvolatile memory EEP-ROM 35. (8) Thereafter, in step ST78, the power of the disk device is turned on again by the operation switch 20. (9) The control microcomputer 14 checks the corresponding information in the nonvolatile memory 35 in step ST79, and in step ST77. The disk insertion / removal is detected or monitored after the power is turned off until the second power-on in step ST78. (10) There is no disk insertion / removal, and in step ST80, the memory in the control microcomputer 14 and the nonvolatile memory 35 are detected. When the first management information stored in is valid, it is determined that the state of the disk inserted into the disk device has not changed from the previous state. (11) At step ST81, the inner circumference side Alternatively, after reading only the first management information of the two recording areas on the outer peripheral side, the apparatus is set to the READY state. Hereinafter, the management information reading mode for reading a smaller number of first management information than the first management information reading mode is referred to as a second management information reading mode. (12) If it is determined in step ST79 that a disk is inserted and removed, and in step ST82, it is determined that a disk is inserted, or if the first management information is invalid in step ST80, ( 13) The first management information of the two recording areas on the inner circumference side of the disk is read in step ST83, (14) seek to the outer circumference side in step ST84, and (15) the outer circumference side in step ST85. The first management information of the two recording areas is read. The management information reading operation in this case is the first management information reading mode. In the above procedure, in order to validate the determination in step ST79, the management information is invalidated at the final stage of the operation of removing the disk from the apparatus. In the above description, in the second management information reading mode, the first management information in the two recording areas on the inner circumference side of the disc is read. However, the first management information in one recording area is read. You may do it. In the case of one, the processing time can be further shortened compared to the case of two. In FIG. 4, the validity is determined based on the insertion / extraction of the disk (step ST79) and the first management information (step ST80). That is, when the operation switch 20 is disconnected, the disk insertion / removal mechanism cannot be operated without a tool. Therefore, the validity is determined based on only the first management information on the assumption that the disk is not normally inserted / removed. There are a method of processing in the second management information reading mode and a method of determining validity by inserting / removing a disk and, if valid, processing in the second management information reading mode.

  FIG. 5 is a flowchart showing another example of the procedure for controlling the reading of management information in the apparatus of FIG. 1, and an example in which both the first management information and the second management information are used for determining the validity. It is. In FIG. 5, (1) in step ST100, the power of the disk device is turned on by the operation switch 20, (2) in step ST101, it is determined whether or not the disk is inserted in the device, and (3) the disk. In step ST102, the first management information on the inner circumference side of the disc is read. (4) After that, seek to the outer circumference in step ST103, and (5) outer circumference side in step ST104. First management information (DMA) is read. (6) Seek to the inner circumference side in step ST105, (7) Read second management information on the inner circumference side in step ST106, (8) Then seek to the outer circumference side in step ST107 (9) In step ST108, the second management information on the outer peripheral side is read. This management information reading operation is a first management information reading mode for reading all management information. (10) Thereafter, when there is a power-off request in step ST109, (11) the validity of the management information is determined in step ST110, and the information is supplied with power, for example, by the built-in battery 16. It is stored in the memory in the control microcomputer 14 or the nonvolatile memory 35. The validity of the management information is, for example, all of the multiple recorded areas read in the first management information reading mode (four recording areas in the first management information, and two recording areas in the second management information). If the information in (region) matches, it is determined to be valid, and if any information does not match, it is determined to be invalid. (12) Thereafter, in step ST111, the control microcomputer 14 to which power is supplied by the built-in battery 16 until the disk device is turned on again by the operation switch 21 is turned off by the control microcomputer 17. The presence / absence of insertion / removal of the disk 25 is detected. (13) Thereafter, in step ST112, the power of the disk device is turned on again by the operation switch 20 (second power-on). (14) Thereafter, the presence / absence of insertion / removal is checked in step ST113. (15) There is no disk insertion / removal after the power is turned off in step ST111 until the power is turned on in step 112. 14, when the first management information stored in the memory 14 or the non-volatile memory 35 is valid, it can be determined that the state of the disk inserted into the disk device has not changed from before, so in step ST115 Then, the first management information of the two recording areas on the inner circumference side of the disc is read. (16) When the second management information stored in the nonvolatile memory 36 in step ST110 is valid in the determination of the second management information in step ST116, (17) In step ST117, the inner circumference side Only the second management information is read, and the apparatus is set to the READY state. In FIG. 5 as well, the validity is determined based on the insertion / removal of the disk and the management information (step ST113, step ST114, step ST116), but the validity is determined only on the other, assuming that one is fixed. May be. That is, the validity may be judged only by the management information on the assumption that the disk is not inserted / removed, and the processing may be performed in the second management information reading mode to start up for a short time, or the management information is valid. Therefore, it is also possible to perform a short activation by processing in the second management information reading mode only by inserting / removing the disk. (18) When it is determined in step ST113 that a disk has been inserted and removed, and in step ST118 it is determined that a disk has been inserted, the validity of the first and second management information in steps ST114 and ST116 is also valid. If either of the first management information and the second management information is invalid in the check, (19) the first management information of the two recording areas on the inner circumference side of the disc is read in step ST119. (20) Then, in step ST120, seek to the outer periphery side of the disc. (21) In step ST121, the first management information of the two recording areas on the outer periphery side of the disc is read. (22) In step ST122, seek to the inner circumference side of the disk. (23) After reading the second management information on the inner circumference side of the disk in step ST123, (24) In step ST124, the outer circumference side of the disk. (25) In step ST125, the second management information on the outer periphery side of the disk is read. This management information reading operation is the first management information reading mode.

  FIG. 6 is a flowchart showing still another example of the procedure for reading management information in the apparatus shown in FIG. 1, and an example in the case where there is a management information update request. In FIG. 6, (1) in step ST130, the power switch 20 is turned on. (2) In step ST131, it is determined whether or not a disk is inserted in the apparatus. In step ST132, management information on the inner circumference side of the disk is read. (4) In step ST133, seek to the outer circumference side of the disk. (5) In step ST134, management information on the outer circumference side of the disk is read. (6) After that, there is a power-off request in step ST135. (7) When there is a management information update request for the first management information or the second management information in ST step 136, (8) the process proceeds to step ST137. Then, all management information that is multiplexed and recorded on the disk and requested to be updated is updated. (9) In step ST138, it is determined whether or not the management information updated in step ST137 has been updated correctly. The determination of the update is made after reading all management information on the updated disk. If all the read management information is correct, the updated management information is valid, and if one piece of management information is not correct, it is invalid. (10) In step ST139, whether or not the management information update is valid is stored in the nonvolatile memory 35 or the like. (11) In step ST140, the apparatus is turned off. The update request is made independently of the power-off request. Note that “power ON” in step ST70 of FIG. 4, step ST100 of FIG. 5, and step ST130 of FIG. 6 is based on the assumption that a disk has been inserted.

  FIG. 7 is a flowchart in which the procedures of FIGS. 4 to 6 are unified, and shows an example of management information reading control procedure with emphasis on the distinction between the first power-on and the second power-on. In FIG. 7, (1) the power is turned on in step ST200, (2) the presence / absence of a disk is determined in step ST201, (3) the insertion / removal of the disk is checked in step ST202, and (4) step ST203. Then, the validity of the management information is checked. (5) If the management information is valid, the first management information reading mode is selected in step ST204. (6) If the management information is not valid. In step ST212, the second management information reading mode is selected. (7) After becoming READY in step ST205, (8) In step ST206, it is determined whether or not there is a management information update request. (9) If there is such a request, in step ST207 Management information is updated (corresponding to step ST136 to step ST138 in FIG. 6). (10) When there is a power-off request in step ST208, the validity of the management information is stored in the memory in step ST209, and (11) the power is turned off in step ST210. As described above, it is possible to appropriately select the management information reading mode when the power is turned on for the first time and the second time. The seek operation and the like in the first management information reading mode and the second management information reading mode are the same as those in FIGS.

  FIG. 8 shows an example of the first management information reading mode and the second management information reading mode. For example, in a DVD-RAM disc, the first management information is defect management information (DMA), and the second management information is file management information (UDF). 8A is a first management information reading mode in which all of the first management information and the second management information are read in order. (B) is a second management information reading mode in which only the first and second management information on the outer peripheral side is read. The numbers in the figure are the reading order. In the second management information reading mode in which only the inner circumference side or the outer circumference side is read, the number of times of seeking the inner and outer circumferences of the disk can be made smaller than in the first management information reading mode.

  According to the first embodiment, the management information reading mode can be selected by determining the validity of the management information and detecting the insertion / removal of the disk. Even when the apparatus power is turned off, the validity of the management information is maintained when the disk is not inserted or removed. Therefore, when the power is turned on again, only a part of the management information is read. By selecting the reading mode, it is possible to shorten the start-up time of the disk device, and to start a quick recording or reproducing operation.

  FIG. 9 shows an example of the configuration of a portable information processing apparatus as a second embodiment of the present invention. In FIG. 9, 151 is a CPU, 152 is a display unit, 153 is an operation unit, 154 is an audio processing DSP (Digital Signal Processor), 155 is a speaker, 156 is an information transmission path interface, 157 is ROM, 158 is RAM, 159 Is an F-ROM as a flash memory, and 160 is an input / output unit. In addition, the same code | symbol is attached | subjected to the same or equivalent functional part as FIG. The second embodiment is a portable information processing apparatus having a recording / reproducing unit 41. The disc 25 that can be inserted into and removed from the recording / reproducing unit 41 of the portable information processing apparatus is used, and the input / output unit 160 is configured to be capable of real-time recording. The input / output unit 160 takes in an audio signal by the microphone 1 and the audio input processing circuit 2, and takes in a video signal by the lens unit 3, the CCD 4 as an image sensor, and the camera video signal processing circuit 5. The information transmission path interface 156 inputs / outputs multimedia information including video, audio, data, and the like to / from an external device or network. Information captured from the input / output unit 160 is processed by the CPU 151 and temporarily stored in the RAM 158 serving as a buffer memory. These pieces of information are recorded in the recording / reproducing unit 41 via the interface circuit 19 when a predetermined amount is reached. Further, the operation of the present apparatus is controlled by an operation by the operation unit 153. The display unit 152 displays the state of the apparatus. The configuration, operation, and operation of each other part are basically the same as those in the first embodiment shown in FIG. In particular, also in the management information reading operation prior to the recording or reproducing operation, when the second embodiment is configured to use the disk as in the first embodiment as the disk for the recording medium, Management information reading control is performed according to the procedure shown in FIGS. 2 to 8 and preparation for recording or reproducing operation is performed.

  According to the second embodiment, as in the case of the first embodiment, the management information reading mode can be selected by determining the validity of the management information and detecting the insertion / removal of the disk. When the second reading mode is selected, the startup time of the disk device can be shortened. Furthermore, high convenience as a portable information processing apparatus can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Microphone, 2 ... Audio input processing circuit, 3 ... Lens unit, 4 ... CCD,
DESCRIPTION OF SYMBOLS 5 ... Camera video signal processing circuit, 6 ... Driver, 7 ... Compression / decompression processing circuit, 8 ... Audio output circuit, 9 ... Audio output terminal, 10 ... LCD, 11 ... Video output terminal, 12 ... Video display / output processing circuit 13 ... D-RAM,
DESCRIPTION OF SYMBOLS 14, 37 ... Control microcomputer, 15, 34, 159 ... F-ROM, 16 ... Built-in battery, 17 ... Insertion / extraction monitoring means, 18 ... EEP-ROM, 19 ... Interface circuit, 20 ... Power switch, 21 ... Charging circuit, 22 DESCRIPTION OF SYMBOLS ... External power input terminal, 23 ... Battery, 24 ... DC-DC converter, 25 ... Disc, 26 ... Spindle motor, 27 ... Pickup, 28 ... Playback circuit, 29 ... Signal / control processing circuit, 30 ... D-RAM, 31 ... Feeding motor, 32 ... Recording circuit, 33 ... S-RAM, 35 ... EEP-ROM, 36 ... Actuator driver, 38 ... Camera unit, 39 ... Output unit, 40 ... Control unit, 41 ... Recording / reproducing unit, 151 ... CPU 152 ... Display unit, 153 ... Operation unit, 154 ... DSP for voice processing, 155 ... Speaker, 156 ... Information Sending passage interface, 157 ... ROM, 158 ... RAM, 160 ... input-output unit.

Claims (17)

A disc device that performs either or both of signal recording and reproduction on a disc in which management information of one content is multiplexed and recorded in a plurality of areas,
A discriminating means for discriminating the effectiveness of the management information in recording or reproducing the signal;
Storage means capable of storing the result of the determination even in a power-off state;
Control means for selecting a mode for reading the management information from the disk based on the determination result information;
And when the stored determination result information is valid for the inserted disk, the management information is read from a part of a plurality of recording areas of the disk prior to the recording or reproducing operation. apparatus. A disc device that performs either or both of signal recording and reproduction on a disc on which management information of the same content is multiplexed and recorded in a plurality of areas,
Detection means for detecting whether or not the disc is mounted;
A discriminating means for discriminating the effectiveness of the management information in the recording or reproduction;
Storage means capable of storing the result of the determination even in a power-off state;
Control means for selecting a mode for reading the management information from the disk based on the determination result information;
And when the disc is detected to be installed when the power is turned on, and the stored determination result information is valid for the inserted disc, one of the plurality of recording areas of the disc is recorded prior to the recording or reproducing operation. Management information is read from the disk unit. A disc device that performs either or both of signal recording and reproduction on a disc on which management information of the same content is multiplexed and recorded in a plurality of areas,
Insertion / removal detection means for detecting insertion / removal of the disk;
Storage means capable of storing the result of the insertion / extraction detection even in a power-off state;
Control means for selecting a reading mode of the management information based on the stored insertion / extraction detection result information;
And when the insertion / extraction of the disc is not detected, the management information is read from a part of the plurality of recording areas of the disc prior to the recording or reproducing operation. A disc device that performs either or both of signal recording and reproduction on a disc on which management information of the same content is multiplexed and recorded in a plurality of areas,
Detection means for detecting whether or not the disc is mounted;
A discriminating means for discriminating the effectiveness of the management information in the recording or reproduction;
Insertion / removal detection means for detecting insertion / removal of the disk;
Storage means capable of storing the result of the insertion / removal detection and the result of the determination even in a power-off state;
Control means for selecting a reading mode of the management information based on the stored insertion / extraction detection result and the determination result;
When the power is turned on and the disc is detected to be mounted, and the stored determination result information is valid for the inserted disc and the insertion / removal of the disc is not detected, prior to the recording or reproducing operation, the disc A disk device characterized in that management information is read from a part of the plurality of recording areas.   The detection means, the discrimination means and the control means are operated by a first power supply, the insertion / extraction detection means and the storage means are operated by a second power supply, and the management is performed when the first power supply is turned on. The disk device according to claim 4, wherein selection of an information reading mode is performed. A disc device that performs either or both of signal recording and reproduction on a disc on which management information of the same content is multiplexed and recorded in a plurality of areas,
Detection means for detecting whether or not the disc is mounted;
A discriminating means for discriminating the effectiveness of the management information in the recording or reproduction for the management information recorded in a plurality of recording areas of the disc;
Storage means capable of storing the result of the determination even in a power-off state;
Control means for selecting a read mode of the management information from the disk based on the stored determination result information;
And when the disc is detected to be installed when the power is turned on, and the stored determination result information is also valid for the inserted disc, the management information for the validated partial area is displayed. A disk device characterized by starting a reading, recording or reproducing operation. A disc device that performs either or both of signal recording and reproduction on a disc on which management information of the same content is multiplexed and recorded in a plurality of areas,
Detection means that operates with a first power source and detects the presence or absence of the disc;
A discriminating means that operates with a first power source and discriminates the validity of the management information in recording or reproduction;
Storage means that operates with a second power source and stores the result of the determination;
A control means that operates with a first power source and selects the management information reading mode based on the stored determination result information;
And when the first power is turned on, the loading of the disk is detected, and when the stored determination result information is valid for the inserted disk, the first area of the disk A configuration in which effective management information is read from either one of the first area and the second area, and when it is determined that the information is not valid, the management information is read from both the first area and the second area. A disk device characterized. A disc device that performs either or both of signal recording and reproduction on a disc on which management information of the same content is multiplexed and recorded in a plurality of areas,
Detection means for detecting whether or not the disc is mounted;
Insertion / removal detection means for detecting insertion / removal of the disk;
Storage means capable of storing the result of the insertion / extraction detection even in a power-off state;
Control means for selecting a reading mode of the management information based on the stored insertion / extraction detection result information;
When the power is turned on, when the installation of the disc is detected and the insertion / removal of the disc is not detected, effective management information is read from a part of a plurality of recording areas of the disc. A disk unit.   The disk device according to claim 1, wherein the plurality of areas in which management information is recorded are divided into an inner periphery and an outer periphery of the disk.   9. The disk device according to claim 1, wherein the plurality of areas in which management information is recorded are four areas, and the management information is controlled to be read from one of these areas.   The management information includes first management information for managing the state of the disc itself and second management information for managing data information recorded for reproduction on the disc. Each of the first and second management information is recorded separately in an inner area and an outer area of the disc, and the first and second management information is read from either area. 9. The disk device according to claim 1, which is controlled. A disc apparatus in which management information of the same content is divided and recorded in a plurality of areas of the disc, and performs either or both of signal recording and reproduction on the disc,
Recording means for recording the management information in first and second areas of the disc;
Discriminating means for discriminating the validity of the recorded management information;
Storage means capable of storing the result of the determination even in a power-off state;
Control means for selecting a read mode of the management information from the disk based on the stored determination result information;
If the stored discrimination result information is also valid for the inserted disc, the management information is read from either the first or second area prior to the signal recording or reproducing operation. A disc apparatus characterized by reading management information from both the first and second areas when it is determined that the management information is not valid.   9. The disk device according to claim 1, wherein the signal to be recorded or reproduced is an information signal from a camera imaging device. An information processing terminal device for processing received information,
Information transmission interface, information processing means for processing information, and / or recording and / or playback of processed information on a disc in which management information of the same content is divided and recorded in multiple areas And a display unit, wherein the disk unit determines the validity of the management information in recording or reproducing the signal, and the result of the determination is a power-off state. If the stored storage means and the stored determination result information are also valid for the inserted disc, the management information is obtained from a part of the plurality of recording areas of the disc prior to the recording or reproducing operation. An information processing terminal device comprising: a control means for controlling to read. An information processing terminal device for processing received information,
Information transmission interface, information processing means for processing information, and / or recording and / or playback of processed information on a disc in which management information of the same content is divided and recorded in multiple areas And a display means, wherein the disk device can store the insertion / removal detection means for detecting the insertion / removal of the disk and the result of the insertion / removal detection even when the power is off. And a control means for controlling to read effective management information from a part of a plurality of recording areas of the disk when the insertion / removal of the disk is not detected as a result of the insertion / removal detection. An information processing terminal device characterized by that. A management information read control method in a disk device that performs either or both of signal recording and reproduction on a disc in which management information of the same content is multiplexed and recorded in a plurality of areas,
Prior to recording or reproducing the signal, reading the management information;
Determining the validity of the read management information;
Storing the result of the determination in a storage means that can be stored even in a power-off state;
Determining whether the stored determination result information is also valid for the inserted disc; and
As a result of the determination, when the stored determination result information is also valid for the inserted disc, the management information is read from a part of a plurality of recording areas of the disc;
A management information reading control method, wherein the management information reading control is performed via A management information read control method in a disk device that performs either or both of signal recording and reproduction on a disc in which management information of the same content is multiplexed and recorded in a plurality of areas,
Detecting the insertion and removal of the disk;
Storing the detection result in a storage means that can be stored even in a power-off state;
When the stored insertion / removal detection result information is a content in which the insertion / removal of the disc is not detected, a step of reading effective management information from a part of a plurality of recording areas of the disc;
A management information reading control method, wherein the management information reading control is performed via

Images