JP2008033999A - Disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk player capable of playing back data by specifying a file format and application format of a medium, even for the data recorded by such a recording format that the relevancy of a kind of the medium, a file system and an application is lessened and the general relevance of them are not being maintained. <P>SOLUTION: A predetermined process can be executed by a medium discriminating means, a file format specifying means and an application format specifying means independently each other, and on the basis of the file format specified by the file format specifying means and the application format specified by the application format specifying means, an application software capable of playing the data being recorded on a mounted disk-like recording medium is selected and executed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disc reproducing apparatus capable of reproducing information recorded on a disc-shaped recording medium such as a CD or a DVD.

  In recent years, large-capacity disc-shaped recording media such as CDs (Compact Discs) and DVDs (Digital Versatile Discs) have been rapidly developed, and optical disc playback apparatuses capable of reproducing information recorded on the respective recording media are provided. Has been.

  Also, there are a wide variety of disk-shaped recording media and their disk playback devices (CD drive, DVD drive). For example, a DVD as a recording medium is a read-only (read-only) DVD-ROM (Read Only Memory) and a write Can be roughly classified into DVD-RAM, DVD-R / RW, and DVD + R / RW.

  By the way, in general, standards and formats of CDs and DVDs are determined for each recording medium. For example, the DVD standard is composed of three layers: a physical layer (physical format), a file system layer (file format), and an application layer (application format). The physical format defines the physical shape and characteristics of the media (the type of disc-shaped recording medium, such as DVD-RAM, DVD-R / RW, DVD + R / RW), and the file format is used when recording information on a DVD. File format (for example, ISO9660, UDF, etc.), and the application format defines a specific purpose (application to be used, for example, DVD-Video, DVD-Audio, DVD-VR, etc.) .

  Here, the file system is a method for recording and managing data, and the data length for managing the file, the number of characters of the file name, the security and access management methods, and the like differ depending on the file system. In particular, as the volume of data to be handled such as storage of video data increases, the capacity of the maximum data area that can be managed and the capacity limit of one file depend on the file system.

  Further, the file system used differs depending on the type (physical format) and application (application format) of the recording medium. For example, most CD-ROMs use ISO9660, and DVDs use a dual-structure file system (UDF bridge) of ISO9660 + UDF (Universal Disk Format) 1.02. As UDF standards related to DVD, UDF1.02 used in DVD-Video, which is one of application formats, and UDF2 used in DVD-VR (Video Recording), which is an application format for real-time recording. .0 etc.

  UDF is also expected as a file system used in next-generation optical discs using a blue laser in order to handle large-capacity files and to guarantee operation between all computer systems. For example, UDF2.5 is adopted for Blu-ray Disc (trademark), and UDF2.6 is adopted for HD DVD.

  Thus, conventionally, a physical format, a file format, and an application format are associated with each recording medium (see FIG. 4), and data is recorded according to these formats. For example, when the recording medium is a DVD-ROM or DVD video, DVD-Video data is recorded according to the UDF bridge.

  Therefore, in a disk recording apparatus such as a DVD recorder, a predetermined recording format is selected automatically or by a user when data is recorded on each recording medium.

  For example, when recording data on a DVD-R, the file format is automatically set to UDF bridge, and the application is set to DVD-Video. In addition, when recording data on a DVD-RW, there are DVD-Video and DVD-VR as application formats. Therefore, the user selects a recording mode (application format), and the file format is based on the selected recording mode. Will be determined. That is, the file format when DVD-Video is selected as the application format is a UDF bridge, and the file format when DVD-VR is selected is UDF 2.00.

  In the DVD standard, there is no limitation that DVD-VR data is not recorded on DVD-R, but DVD-VR is a standard that can be used for data addition and editing on the premise that data is recorded (recorded) in real time. Therefore, it is not desirable to record in a DVD-VR mode on a DVD-R that cannot flexibly cope with data addition or editing (it cannot effectively use the free area of the disc). Therefore, a general disk recording device does not have a specification for recording DVD-VR data on a DVD-R.

  As described above, since DVD has various recording formats (file format, application format), in order to reproduce data recorded on each recording medium, a disc corresponding to each recording format. A playback device is required. Recently, a disc playback device called a DVD multi-drive that supports a plurality of recording formats with a single device has also been proposed. In general, not only DVD but also CD-ROM and CD-R / RW can be reproduced.

  Further, for example, Patent Documents 1 to 3 are related to the relationship between the type of recording medium, the file system, and the application.

JP-A-2005-174241 JP 2004-102701 A JP 2004-537089 A

  By the way, in a disc playback apparatus that supports a plurality of recording formats, after identifying a mounted recording medium, the file format that is actually used is recognized based on the file format that can be used for the recording medium, A process of determining and executing an application to be used based on the file format is performed.

  For example, if the physical format recorded in the lead-in area of the recording medium is determined to be DVD-RW, the file format that can be used for DVD-RW is either UDF bridge (ISO9660 + UDF1.02) or UDF2.00. It becomes. Thereafter, the file system specific information recorded on the DVD-RW is read out to determine whether the file format is UDF bridge or UDF 2.00. If the file format is a UDF bridge, a DVD-Video application is executed. If the file format is UDF 2.00, a DVD-VR application is executed.

  Since an application that can be automatically used is determined and executed by such processing, for example, when DVD-VR data is recorded on a DVD-R, this data cannot be reproduced. Poor flexibility for reproducible recording media. That is, when it is determined that the physical format is DVD-R, the file format should be a UDF bridge, and the application used in this file format is automatically determined as DVD-Video. Therefore, when DVD-VR data is recorded on DVD-R according to UDF 2.00, an error occurs because the file format cannot be recognized normally.

  However, when recording a copy-once broadcast on a recording medium, it must be recorded on a recording medium in a DVD-VR mode suitable for real-time recording. However, if a program is simply recorded, it is cheaper than a DVD-RW. Recording to -R is considered preferable for the user.

  Recently, it is also possible to copy the data array of the original recording medium to another recording medium as it is using a personal computer (so-called bit-by-bit transfer). By this bit-by-bit transfer, for example, DVD-VR data recorded on a DVD-RW can be easily recorded on a DVD-R. For example, data recorded by a DV camera can be temporarily recorded on a DVD-RW in the DVD-VR mode, edited on the DVD-RW, and then the data can be transferred to the DVD-R and distributed. Conceivable.

  However, the conventional disk reproducing apparatus cannot reproduce this data even with the DVD-R created as described above.

  Also, the conventional disc playback apparatus cannot play back data recorded in a recording format that does not hold the association of media type, file system, and application as shown in FIG.

  Therefore, the present invention reduces the relevance of the media type, file system, and application, and even if the data is recorded in a recording format that does not hold these general associations, An object of the present invention is to provide a disc playback apparatus that can specify an application format and play back data.

  The present invention has been made to achieve the above object, and is a disc playback apparatus capable of reading out and reproducing the data from a disc-shaped recording medium on which data is recorded according to a predetermined format, the disc-shaped disc being mounted. Media identification means for identifying the type of recording medium, file format identification means for identifying a file format from information relating to the file system of the disk-shaped recording medium, and an application corresponding to the file structure recorded on the disk-shaped recording medium An application format specifying means for specifying a format, a storage medium storing a plurality of application software, and an application execution means for executing specific application software from the plurality of application software. The media identifying means, the file format specifying means, and the application format specifying means can execute predetermined processing independently of each other, and the application executing means includes the file format specified by the file format specifying means, Based on the application format specified by the application format specifying means, application software capable of reproducing the data recorded on the disc-shaped recording medium is selected and executed.

  Specifically, the file format specifying means includes a plurality of file formats including an ISO9660 format and a plurality of versions of universal disk formats (for example, UDF1.02, UDF1.5, UDF2.00, UDF2.5, etc.). The file format of the disk-shaped recording medium is specified from among the plurality of file formats including a DVD-Video format, a DVD-Audio format, and a DVD-VR format. The application format was specified.

  Further, the plurality of application software can play back data recorded in accordance with a combination of the plurality of file formats and the plurality of application formats. By preparing such application software, data in various recording formats can be reproduced.

  The type of the disc-shaped recording medium includes CD-DA (music CD), and the application execution means determines that the type of the disc-shaped recording medium is CD-DA by the media identifying means. In this case, application software for CD-DA is selected and executed. That is, when the media identification means determines that the type of the disk-shaped recording medium is CD-DA, the file format specifying process and the application format specifying process are not performed. That is, since the file system is not incorporated in the CD-DA, the processing speed can be improved by omitting the file format specifying process.

  According to the present invention, it is possible to reproduce even data recorded in a recording format that does not hold a general association of a media type, a file format, and an application format that have been conventionally used.

  That is, conventionally, the file format used is limited by the media type, and the application format is limited by the file format. The media type, the file format, and the application format are associated with each other. However, data recorded in a recording format that does not hold this association could not be reproduced, but the disc reproducing apparatus according to the present invention can eliminate such a problem.

  For example, even when DVD-VR format data (file format is UDF2.00) is recorded on a DVD-R, the data can be reproduced by executing a predetermined application compatible with DVD-VR. Become.

  Also, in the future, if the user can record data on the media by selecting the media type, file format, application format freely or without paying attention to the current general association It can respond flexibly. Also, with the disc playback apparatus according to the present invention, the user does not need to pay attention to the above general association when recording data on a medium, so that workability is greatly improved.

  Furthermore, even when new media such as next-generation optical discs, file formats, and application formats are developed, it is considered that they can be handled relatively easily by making them recognizable by software.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a CD / DVD playback apparatus as an embodiment of a disk playback apparatus according to the present invention.
A DVD recorder 100 according to the present embodiment includes a disk drive 10 for reading data from a disk-shaped recording medium such as a CD and a DVD, a digital signal processing unit 20 that converts an RF signal acquired by the disk drive into predetermined digital data, and The decoding unit 30 that decompresses and restores the processed compressed data, the output unit 40, the storage unit 50, and the control unit 60 are included.

  The disk drive 10 includes a spindle motor 11, an optical pickup 12, a tracking motor 13, and a servo system 14. The disk-shaped recording medium M such as a DVD is rotated by the spindle motor 11, the optical pickup 13 is operated by the tracking motor 14, and the data recorded on the disk-shaped recording medium is read by the optical pickup 13. Specifically, the optical pickup 13 irradiates the disc-shaped recording medium M with a predetermined laser beam and receives the reflected light. In the present embodiment, a pickup technology that can handle CD and DVD, for example, a 2-pickup system, a 2-objective lens system, a 2-focus lens system, and the like are employed. The spindle motor 11 and the tracking motor 14 are controlled by a servo system 14.

  The digital signal processing unit 20 includes an RF signal processing unit 21, a demodulation unit 22, an error correction unit 23, and a demultiplexer 21. The RF signal processing unit 21 converts the waveform signal (RF signal) of the reflected light received by the optical pickup 13 into digital data. The demodulator 22 demodulates the digital data recorded and encoded by a predetermined modulation method (for example, 8/16 modulation) into the original data. The error correction unit 23 performs error correction on the demodulated data by a predetermined error correction method (for example, RS-PC (Reed-Solomon Product Code) method). The demultiplexer 24 separates the digital data processed by the error correction unit 23 into video data, caption data, and audio data (stream separation).

  The decoding unit 30 includes a video decoder 31 and an audio decoder 32. The video decoder 31 decompresses the video data compressed by a predetermined method (for example, MPEG-2 method) and restores the original state. The audio decoder 32 decompresses the audio data compressed by a predetermined method (for example, Dolby AC-3 method) and restores the original state.

  The output unit 40 includes an NTSC / PAL encoder 41 and D / A converters 42 and 43. The NTSC / PAL encoder 41 encodes the video signal (color difference signal) restored by the video decoder 31 into a system such as NTSC or PAL so that it can be viewed on a television receiver. The D / A converter 42 converts the digital data encoded by the NTSC / PAL encoder 41 into an analog signal and outputs the analog signal. The D / A converter 43 converts the audio signal (for example, linear PCM) restored by the audio decoder 32 into an analog signal and outputs it.

  The storage unit 50 includes, for example, information necessary to specify the type of the disk-shaped recording medium M and the recording format of the recorded data, and application software that can reproduce data recorded in a plurality of recording formats. Store.

  The control unit 60 records a CPU that controls each block and performs predetermined calculations to control the operation of the DVD playback apparatus 100, a RAM that is used as a work memory for the CPU, a control program that is executed by the CPU, and the like. ROM.

  The control unit 60 identifies the type of the disk-shaped recording medium M based on, for example, the physical format recorded in the lead-in area of the loaded disk-shaped recording medium M (media identification unit). Further, the file format of data recorded based on information (for example, tag identifier) related to the file system of the disk-shaped recording medium M is specified (file format specifying means) and recorded on the disk-shaped recording medium M. A corresponding application format is specified from the file structure (application format specifying means). Further, the control unit 60 can reproduce the data recorded on the disk-shaped recording medium M from among a plurality of application software stored in the storage unit 50 based on the specified file format and application format. Appropriate application software is selected and executed (application execution means).

FIG. 2 is an explanatory diagram showing an example of media types and recording formats (application format and file format) that can be played back in the CD / DVD playback apparatus of this embodiment.
Specifically, in the CD / DVD playback apparatus of the present embodiment, CD-DA (music CD, CD-ROM, CD-R / RW, DVD-ROM, DVD-R / RW, DVD + R / RW, DVD-RAM) Data can be read from disk-shaped recording media such as CD audio, PC data, CD video, DVD-Video, DVD-Audio, DVD-VR, etc. as file formats, It corresponds to ISO9660, UDF bridge (ISO9660 + UDF1.02), UDF2.0, and the like.

FIG. 3 is a flowchart showing media playback processing executed in the CD / DVD playback apparatus of this embodiment.
First, in step S101, it is determined whether the disc-shaped recording medium M is loaded in the disc drive. When it is determined that the disc-shaped recording medium M is loaded, the type of the loaded disc-shaped recording medium M is determined. Specifically, the type of the disk-shaped recording medium M is determined based on the physical characteristics (reflectance, etc.) of the loaded disk-shaped recording medium M and the physical format recorded in the lead-in area. For example, DVD and CD can be easily distinguished by using a focus S-shaped signal when the objective lens is moved away from the disc.

  Next, if it is determined in step S102 that the loaded disc-shaped recording medium M is a CD-DA, a CD-DA application, that is, a CD-Audio application is selected (step S109). This is executed (step S108). That is, when the mounted disc-shaped recording medium M is a CD-DA, since the file system is not incorporated, the application to be executed can be specified without specifying the file format. In this way, the processing speed can be improved by omitting the file format specifying process.

  On the other hand, if it is determined in step S102 that the loaded disc-shaped recording medium M is other than CD-DA, the file management information recorded on the disc-shaped recording medium M is analyzed (step S103). In step S104, the file format of the recorded data is specified based on specific information (for example, tag identifier) regarding the file system included in the file management information (file format specifying means). Here, since the file management information (or its structure) is different for each file system, it is possible to specify the file format by using information specific to the file system.

  Next, the file structure recorded on the disc-shaped recording medium M is analyzed (step S105). At this time, since the file format is specified in step S104, the file structure can be analyzed by using a file system capable of reading data recorded in this file format.

  In step S106, the application format of the recorded data is specified based on the analyzed file structure (application format specifying means). For example, if there is a folder “VIDEO_TS” and a file group is stored in the folder, the application format can be specified as DVD-Video. If a file group is stored in the folder “AUDIO_TS”, the application format can be specified as DVD-Audio.

  Next, application software capable of reproducing data in a recording format that combines the file format specified in step S104 and the application format specified in step S106 is selected (step S107), and the application software is executed (step S108). . For example, when it is specified that the file format is UDF2.0 and the application format is DVD-VR, application software capable of reproducing this recording format (conventional DVD-VR mode) is executed.

  As described above, in the CD / DVD reproducing apparatus of the present embodiment, the file format and application format of the recorded data are specified regardless of the type of the loaded disc-shaped recording medium M, and recording is performed in the specified format. Application software capable of reproducing the recorded data is executed.

  At present, there is a general association (see FIG. 4) among the media type, file format, and application format, and the disc playback apparatus plays back data recorded in a recording format that does not hold this association. I couldn't. On the other hand, in the CD / DVD playback apparatus of the present embodiment, when data is recorded in a recording format that does not hold a general association of a media type, a file format, and an application format that are conventionally used However, the recording format (file format and application format) can be specified from the disk-shaped recording medium and reproduced.

  For example, even when data in the DVD-VR format (file format is UDF 2.00) is recorded on a CD-R or DVD-R, the data can be reproduced by executing a predetermined application compatible with DVD-VR. Can do. At present, the file format for DVD-VR is UDF 2.00, but it can be handled even when other file formats suitable for DVD-VR are developed.

  Also, in the future, if the user can record data on the media by selecting the media type, file format, application format freely or without paying attention to the current general association It can respond flexibly. Furthermore, with the disc playback apparatus according to the present invention, the user does not have to pay attention to the general association described above when recording data on a medium, so the workability when recording data is greatly improved. .

  As mentioned above, although the invention made by this inventor was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

  For example, the media type, file format, and application format that can be supported by the CD / DVD playback apparatus of the above embodiment are not limited to those shown in FIG. In other words, even when next-generation optical discs such as Blu-ray Disk (trademark) and HD DVD, file formats, and application formats are developed, they can be handled relatively easily by making them recognizable by software. it is conceivable that. In this case, application software capable of reproducing data recorded in a new file format or application format is required, but this can be dealt with by storing the corresponding application format in the storage unit 50.

It is a block diagram which shows the structure of the DVD recorder which concerns on one Embodiment of this invention. It is explanatory drawing which shows the combination of the kind of media which can be reproduce | regenerated with the CD / DVD reproducing | regenerating apparatus of this embodiment, a file format, and an application format. It is a flowchart which shows the media reproduction | regeneration processing performed with the CD / DVD reproducing | regenerating apparatus of this embodiment. It is explanatory drawing which shows the general correlation of the kind of present media, a file format, and an application format.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Disc drive 20 Digital signal processing part 30 Decoding part 40 Output part 50 Storage part 60 Control part 100 CD / DVD reproducing | regenerating apparatus M Disc-shaped recording medium

Claims (5)

A disc playback apparatus capable of reading and reproducing the data from a disc-shaped recording medium including a CD and a DVD on which data is recorded according to a predetermined format,
A medium identifying means for identifying the type of the loaded disc-shaped recording medium;
A file for specifying the file format of the disk-shaped recording medium from a plurality of file formats including the ISO9660 format and a plurality of versions of the universal disk format based on information on the file system recorded on the disk-shaped recording medium Format identification means;
An application for specifying an application format of the disk-shaped recording medium from a plurality of application formats including a DVD-Video format, a DVD-Audio format, and a DVD-VR format based on the file structure recorded on the disk-shaped recording medium Format identification means;
A storage medium storing application software capable of reproducing data recorded according to a combination of the plurality of file formats and the plurality of application formats;
Application execution means for executing specific application software from the plurality of application software;
With
The media identifying means, the file format specifying means, and the application format specifying means can execute predetermined processing independently of each other,
The application execution means
When it is determined by the media identifying means that the type of the disc-shaped recording medium is not CD-DA, the file format specified by the file format specifying means and the application format specified by the application format specifying means Based on the application software that can reproduce the data recorded on the disc-shaped recording medium,
A disc reproducing apparatus, wherein when the media identifying means determines that the type of the disc-shaped recording medium is CD-DA, application software for CD-DA is selected and executed. A disk playback device capable of reading and playing back the data from a disk-shaped recording medium on which data is recorded according to a predetermined format,
A medium identifying means for identifying the type of the loaded disc-shaped recording medium;
File format specifying means for specifying a file format from information related to the file system of the disk-shaped recording medium;
Application format specifying means for specifying the corresponding application format from the file structure recorded on the disc-shaped recording medium;
A storage medium storing a plurality of application software;
Application execution means for executing specific application software from the plurality of application software;
With
The media identifying means, the file format specifying means, and the application format specifying means can execute predetermined processing independently of each other,
The application executing means is an application capable of reproducing data recorded on the disc-shaped recording medium based on the file format specified by the file format specifying means and the application format specified by the application format specifying means. A disc playback apparatus characterized in that software is selected and executed. The file format specifying means specifies a file format of the disc-shaped recording medium from a plurality of file formats including an ISO9660 format and a plurality of versions of a universal disc format,
The application format specifying means specifies an application format of the disc-shaped recording medium from a plurality of file formats including a DVD-Video format, a DVD-Audio format, and a DVD-VR format. The disc reproducing apparatus described.   4. The disc reproducing apparatus according to claim 3, wherein the plurality of application software can reproduce data recorded in accordance with a combination of the plurality of file formats and the plurality of application formats. The disc-shaped recording medium includes CD-DA (music CD),
The application execution means selects and executes application software for CD-DA when the medium identification means determines that the type of the disc-shaped recording medium is CD-DA. Item 5. The disk reproducing device according to any one of Items 2 to 4.

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