JP4316471B2 - Information recording / reproducing apparatus and method - Google Patents

Description

  The present invention records information on an apparatus for reproducing information recorded on an optical disc (DVD-ROM, DVD-Video, DVD-RAM, DVD-RW, DVD-R, etc.) and a recordable medium. The present invention also relates to a device that can perform recording and a recording / reproducing method.

In recent years, optical discs capable of recording information at high density have been developed, and their uses have been various. This main optical disc is called a digital versatile disc (DVD), and the following types are standardized. In other words, it is a DVD-Video that records video signals and is used exclusively for playback, DVD-RAM and DVD-RW that can be recorded and played back, and DVD-R that is used as a write once type (also called write-once type). is there.
JP-A-9-259538

    As described above, when various types of media are devised and information is recorded on each medium, information recording is performed according to the corresponding logical format. That is, the medium and the standardized logical format used when information is recorded on the medium are paired.

  Therefore, conventionally, when media determination is performed by a drive device when an optical disk is loaded in a recording device, an application for executing processing based on a logical format corresponding to the media has been automatically determined. However, recently, a medium and a logical format standardized corresponding to this medium are not always used in a correspondence relationship. Due to the demand for versatile recording media, for example, information based on a logical format standardized by DVD-ROM may be recorded on DVD-R.

  Here, if a DVD-R is loaded into a recording device and information is added in a logical format standardized for DVD-R, the management information of the recorded logical format for DVD-ROM may be destroyed. is there.

  Accordingly, the present invention provides an information recording / reproducing apparatus that can be used with peace of mind even when information recorded on a recording medium is not recorded in a standardized logical format corresponding to the recording medium. And to provide a method.

  In order to achieve the above object, an embodiment of the present invention provides a first determination unit that obtains a first determination result for identifying the type of an optical disk from physical format information of the loaded optical disk, A second determination unit that obtains a second determination result for identifying a type of the optical disk by checking a logical format from information of the file system; and a disk of the same type in which the first determination result and the second determination result are When the determination result of the third determination unit that determines whether or not it is present and the determination result of the third determination unit indicates that the disc is not of the same type, only reproduction of the recorded information on the optical disc is performed. Has the function to allow.

  By the means described above, even if the information recorded on the recording medium is not recorded in a logical format standardized corresponding to the recording medium, it can be used with confidence. In addition, the presence of the above means may allow information recording on a recording medium to be executed by an application of various logical formats, and expandability is enhanced when using the recording medium.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a video recording apparatus to which the present invention is applied. In this embodiment, an apparatus capable of handling both an optical disk such as a DVD and a hard disk as a recording medium is shown, but the optical disk such as a hard disk or DVD may be replaced with a recording medium such as a semiconductor memory.

  In FIG. 1, each block is roughly divided. The main block of the recording unit is shown on the left side, and the main block of the playback unit is shown on the right side.

  The video recording apparatus in FIG. 1 has two types of disk drive units. First, it has a disk drive unit 1002 that rotates and drives an optical disk 1001 as a first medium, which is an information recording medium capable of building a video file, and executes reading and writing of information. The hard disk drive unit 2001 drives a hard disk as a second medium. The data processor unit 1003 can supply recording data to the disk drive unit 1002 and the hard disk drive unit 2001, and can receive a reproduced signal. The disk drive unit 1002 includes a rotation control system, a laser drive system, an optical system, and the like for the optical disk 1001.

  The data processor unit 1003 handles recording or reproduction unit data, and includes a buffer circuit, a modulation / demodulation circuit, an error correction unit, and the like.

  The video recording apparatus in FIG. 1 mainly includes an encoder section 50 that constitutes a recording side, a decoder section 60 that constitutes a playback side, and a microcomputer block 30 that controls the operation of the apparatus main body.

  The encoder unit 50 includes a video and audio analog-to-digital converter that digitizes an input analog video signal or analog audio signal, a video encoder, and an audio encoder. Furthermore, a sub-picture encoder is also included.

  The output of the encoder unit 50 is converted into a predetermined DVD-RAM format by a formatter 51 including a buffer memory and supplied to the data processor unit 1003.

  The encoder unit 50 receives an external analog video signal and an external analog audio signal from the AV input unit 41 or an analog video signal and an analog audio signal from the TV tuner unit 42.

  The encoder unit 50 can also supply the compressed digital video signal or digital audio signal directly to the formatter 51 when a directly compressed digital video signal or digital audio signal is directly input. The encoder unit 50 can also directly supply the digital video signal and audio signal that have been converted from analog to digital to the video mixing unit 71 and the audio selector 76.

  In the video encoder included in the encoder unit 50, the digital video signal is converted into a digital video signal compressed at a variable bit rate based on the MPEG2 or MPEG1 standard. The digital audio signal is converted into a digital audio signal compressed at a fixed bit rate based on the MPEG or AC-3 standard, or a linear PCM digital audio signal.

  When a sub-video signal is input from the AV input unit 41 (for example, a signal from a DVD video player with an independent output terminal of a sub-video signal), or a DVD video signal having such a data structure is broadcast and is transmitted to a TV tuner. When received by the unit 42, the sub-picture signal in the DVD video signal is encoded (run-length encoded) by the sub-picture encoder to become a sub-picture bitmap.

  The encoded digital video signal, digital audio signal, and sub-picture data are packed by the formatter 51 to become a video pack, an audio pack, and a sub-picture pack, and these are assembled and defined by the DVD-video standard. It is converted into a format (DVD Video format) or a format defined in the DVD-recording standard (DVD VR format).

  Here, the apparatus of FIG. 1 uses the data processor unit 1003 to send information (packets of video, audio, sub-picture data, etc.) formatted by the formatter 51 and the created management information to the hard disk drive unit 2001 or the data disk. It can be supplied to the drive unit 1002 and recorded on the hard disk or the optical disc 1001. Information recorded on the hard disk or the optical disk 1001 can also be recorded on the optical disk 1001 or the hard disk via the data processor unit 1003 and the disk drive unit 1002.

  It is also possible to perform an editing process such as deleting a part of video objects of a plurality of programs recorded on the hard disk or the optical disc 1001 or connecting objects of different programs. This is because the data unit handled by the format according to the present invention is defined to facilitate editing.

  The microcomputer block 30 includes an MPU (micro processing unit) or CPU (central processing unit), a ROM in which a control program and the like are written, and a RAM for providing a work area necessary for program execution. Yes.

  The MPU of the microcomputer block 30 executes the defect location detection, unrecorded area detection, recording information recording position setting, UDF recording, AV address setting, etc., using the RAM as a work area according to the control program stored in the ROM. To do.

  The microcomputer block 30 includes an information processing unit necessary for controlling the entire system, and includes a work RAM 31, a directory detection unit 32, a VMG (total video management information) information creation unit, a copy-related information detection unit, A copy and scrambling information processing unit (RDI processing unit), a packet header processing unit, a sequence header processing unit, an aspect ratio information processing unit, and the like are provided.

  The microcomputer block 30 also includes a management information control unit 34 for recording and a management information control unit 33 for editing. The means characterized by the present invention is executed in the form of a control program by the management information control unit 33 when executing this editing and the management information control unit 34 when executing recording.

  The contents to be notified to the user among the execution results of the MPU are displayed on the display unit 43 of the video data recording / reproducing apparatus or displayed on the monitor display by OSD (on-screen display). The microcomputer block 30 also has a key input unit 44 for giving an operation signal for operating this apparatus. The key input unit 44 corresponds to, for example, operation switches provided on the main body of the video recording apparatus or a remote controller. Moreover, the personal computer connected with the video recording apparatus of this invention using means, such as wired communication, radio | wireless communication, optical communication, and infrared communication, may be sufficient. Regardless of the form, when the user operates the key input unit 44, recording processing of the input video / audio signal, playback processing of the recorded content, editing processing on the recorded content, and the like are performed. Can be applied.

  The timing at which the microcomputer block 30 controls the disk drive unit 1002, the hard disk drive unit 2001, the data processor unit 1003, the encoder unit 50, and / or the decoder unit 60 is time data from an STC (system time clock) 38. Can be performed based on. The recording and playback operations are normally executed in synchronization with the time clock from the STC 38, but other processing may be executed at a timing independent of the STC 38.

  The decoder unit 60 separates and extracts each pack from a DVD format signal having a pack structure, a memory used when performing pack separation and other signal processing, and main video data (video packs) separated by the separator. V decoder that decodes the content), an SP decoder that decodes the sub-picture data separated by the separator (the contents of the sub-picture pack), and an A decoder that decodes the audio data separated by the separator (the contents of the audio pack) Have A video processor is also provided that appropriately synthesizes the decoded sub-video with the decoded main video and outputs the main video with a menu, a highlight button, subtitles, and other sub-videos.

  The output video signal of the decoder unit 60 is input to the video mixing unit 71. In the video mixing unit 71, text data is synthesized. The video mixing unit 71 is also connected to a line that directly takes in signals from the TV tuner 42 and the A / V input unit 41. A frame memory 72 used as a buffer is connected to the video mixing unit 71. When the output of the video mixing unit 71 is an analog output, it is output to the outside via an I / F (interface) 73, and when it is a digital output, it is output to the outside via a digital / analog converter 74.

  The output audio signal of the decoder unit 60 is analog-converted by the digital-analog converter 77 via the selector 76 and output to the outside. The selector 76 is controlled by a select signal from the microcomputer block 30. As a result, the selector 76 can directly select a signal that has passed through the encoder unit 50 when directly monitoring a digital signal from the TV tuner 42 or the A / V input unit 41.

  Note that the formatter of the encoder unit 50 creates segmentation information during recording and periodically sends it to the MPU of the microcomputer block 30 (information at the time of GOP head interrupt, etc.). The segmentation information includes the number of VOBU packs, the end address of the I picture from the beginning of the VOBU, and the playback time of the VOBU.

  At the same time, information from the aspect information processing unit is sent to the MPU at the start of recording, and the MPU creates VOB stream information (STI). Here, the STI stores resolution data, aspect data, and the like, and at the time of reproduction, each decoder unit is initialized based on this information.

  In this apparatus, one video file is recorded on one disc. In order to continue playback without interruption while accessing (seeking) data, a minimum continuous information unit (size) is determined. This unit is called CDA (Contiguous Data Area). The CDA size is a multiple of an ECC (error correction code) block (16 sectors), and the file system records in this CDA unit.

  The data processor unit 1003 receives VOBU unit data from the formatter of the encoder unit 50 and supplies the CDA unit data to the disk drive unit 1002 or the hard disk drive unit 2001. In addition, the MPU of the microcomputer block 30 creates management information necessary for reproducing the recorded data. When the MPU recognizes a data recording end command, it sends the created management information to the data processor unit 1003. Thereby, the management information is recorded on the disc. Therefore, when encoding is performed, the MPU of the microcomputer block 30 receives data unit information (eg, segmentation information) from the encoder unit 50. The MPU of the microcomputer block 30 recognizes the management information (file system) read from the optical disk and the hard disk at the start of recording, recognizes the unrecorded area of each disk, and sets the data processor area to the data processor unit 1003. Is set to disk via.

  Next, the relationship between management information and actual video data as content will be briefly described with reference to FIG. In FIG. 2, first, actual video data will be described. Here, it is assumed that the actual video data is collected into one file on the recording medium. One file is composed of one or a plurality of actual video data streams. Each actual video data stream may be a unit recorded by one recording process, for example. This corresponds to, for example, VOB (video object) in the DVD recording standard. One real video data stream is composed of one or a plurality of stream partial areas. This corresponds to, for example, VOBU (video object unit) in the DVD recording standard, GOP (group of picture) in the MPEG2 standard, and the like. One stream partial area is composed of a plurality of packs. As the plurality of packs, there are an information pack, a video pack, an audio pack, and the like. There may be a sub-picture pack.

  The information pack corresponds to, for example, an RDI pack in the DVD recording standard. In this case, this pack includes information indicating the start time of reproduction of the first field of the VOBU to which the pack belongs, information indicating the recording time of the VOBU, manufacturer information (MNFI), and the like. It also includes display control information (DCI) and copy control information (CCI). The display control information indicates aspect ratio information, subtitle mode information, and film camera mode information. The copy control information includes copy permission information or copy prohibition (non-permission) information.

  The video pack is a video data compressed by the MPEG2 system, and is composed of a pack header, a packet header, and a video data portion.

  The audio pack is obtained by processing audio data by a method such as linear PCM, MPEG, or AC-3, and includes a pack header, a packet header, and an audio data portion.

  Next, management information will be described. In the management information, original title (program) information, which is information for managing the playback order of actual video data (playback order information), is defined. This corresponds to, for example, a program in the DVD recording standard. Reference information is defined in each original title information (or program information), which is linked to real video data information that is information about real video data to be reproduced. These correspond to, for example, cells and video object information (VOBI) in the DVD recording standard.

  Thus, the original title (program) has information for managing the playback order (playback order information) and its own real video data, and this title is usually created during recording.

  On the other hand, some information is composed only of information for managing the reproduction order (reproduction order information). This is playlist information, for example, a playlist in the DVD recording standard. The playlist information does not have its own real video data, and as shown in FIG. 2, the playlist information is edited (deleted or added) by editing reference information linked to the real video data information of the original title. Created as

  Time map information is described in the real video data information. This time map information designates a partial area constituting an actual video data stream corresponding to the actual video data information. A link from the original title information of the management information or the reference information of the playlist information to the actual video data information is specified by a logical address. The link from the time map information to the actual video data stream and its partial area includes the number of the actual video data stream, the number of partial areas in the stream, the entry number for each partial area, and the logical address to each partial area. Is done on the basis of With such a configuration, not only normal playback of recorded video data but also special playback such as double speed / slow playback and reverse playback, and scene search can be supported.

  Hereinafter, the operation of the present invention will be described with reference to FIG. 3 and subsequent drawings. In the following description, the video recording apparatus of the present invention has the following configuration.

  First, it is assumed that the video recording apparatus according to the present invention is a DVD recording apparatus based on the DVD recording standard (DVD VR standard). In this case, recording is performed on a DVD in a data format called a DVD VR format. In addition, the video recording apparatus according to the present invention has a function of recording on a DVD based on the DVD video standard. In this case, recording is performed on a DVD in a data format called a DVD Video format.

  The video recording apparatus according to the present invention can use not only rewritable DVD-RAM and DVD-RW but also DVD-R which is a write-once medium. The recording format for these DVDs is not uniquely fixed for each DVD type. For example, DVD-R can be recorded in either the DVD VR format or the DVD Video format. Can be implemented.

  Further, in the following description, the video recording apparatus of the present invention is assumed to be a hybrid recorder having two recording media of DVD and HDD as shown in the block diagram of FIG. Assume that video information can be dubbed between HDDs. However, the contents of the present invention are not applied only to a hybrid recorder, but can also be applied to a recorder of a single DVD having only a DVD recording function.

  In the video recording apparatus of the present invention, a partial area in a recorded title is called a chapter. For example, when recorded in the DVD VR format, the chapter uses an entry point (EP) defined in the DVD VR standard, which is set in the title, as a mark for the boundary. In other words, a section sandwiched between EPs set in the title is called a chapter. Note that the title start and end points are chapter boundaries regardless of the presence or absence of EP. Therefore, there may be no EP standing for the first chapter of the title.

  FIG. 3 is a schematic diagram showing the structure of directories and files defined by the DVD recording standard (DVD VR standard). FIG. 3 shows directories and files defined in Ver. 1.1 of the DVD VR standard.

  In the DVD VR standard Ver. 1.1, a subdirectory called DVD_RTAV is provided under the root directory, and files defined by the standard are stored under this DVD_RTAV. That is, only five types of files shown in FIG. 3 exist under DVD_RTAV. Hereinafter, individual files will be described.

  First, VR_MANGR.IFO is navigation data for an original title (program) and a playlist. This corresponds to the management information shown in FIG. Playlists, entry points (EP), etc. are described in this VR_MANGR.IFO. Even if the video data is not directly processed, editing processing such as deletion of unnecessary scenes can be performed by changing the description of VR_MANGR.IFO. Therefore, when editing processing such as chapter creation or playlist editing is performed, this VR_MANGR.IFO is mainly the processing target. In VR_MANGR.IFO, time map information for actual video data is written in conjunction with recording. This VR_MANGR.IFO also contains information about the entire disc, so it is created immediately when the DVD is initialized.

  VR_MANGR.BUP is a backup file of the above VR_MANGR.IFO. This VR_MANGR.BUP is an option in the standard and does not necessarily have to exist. If VR_MANGR.BUP is used, the contents of the file must be the same as VR_MANGR.IFO.

  On the other hand, VR_MOVIE.VRO is an AV (Audio Visual) data file of a recorded moving image, and corresponds to the actual video data of FIG. 2 described above. Here, packed video data, audio data, and, if supported, sub-picture data are multiplexed and stored.

  The VR_STILL.VRO file is an AV data file of a still image, and corresponds to the actual video data of FIG. 2 described above, like VR_MOVIE.VRO. Here, packed video data is stored, and audio data and sub-picture data may be multiplexed as an option.

  The VR_AUDIO.VRO file is a data file containing after-recording (after recording) audio information for the still image stored in the VR_STILL.VRO.

  VR_MOVIE.VRO, VR_STILL.VRO and VR_AUDIO.VRO files do not exist when the DVD is initialized, but are created when recording is actually performed, and video data and audio data will be recorded. . Note that these three types of files do not necessarily exist. For example, a VR_STILL.VRO or VR_AUDIO.VRO file may not exist in a video recording apparatus that does not have a still image recording function or a post-recording function.

  The files specified in Ver. 1.1 of the DVD VR standard are the above, but in addition to that, for the purpose of improving the operability of the video recorder and adding functions, create a unique information file for the video recorder. It is also possible to do. In that case, these unique information files must not be stored under DVD_RTAV, but must be stored directly under the root directory or under a unique subdirectory created under the root directory.

  The apparatus according to the present invention includes, for example, a physical format information processing unit (first determination unit) and a logical format information processing unit (second determination unit) described below in the microcomputer block 30. The logical format information processing unit includes a first check unit and a second check unit. Furthermore, a third determination unit that determines the final processing mode by combining the results obtained from the first and second determination units is provided.

FIG. 4 shows a table of physical format information (Physical format information) used in the first determination unit. The physical format information is defined in an optical disc standard that inherits UDF (Universal Disc Format) and is described in the lead-in area. This physical format information is a total of 2048 bytes and is the amount of information stored in one ECC (one error collection code) block of the DVD standard.
In the first byte point (BP), a book type and part version (Book type and Part version) are described in 1 byte. The next 1 byte describes the disc size and the maximum transfer rate of the disc. The next 1 byte describes the disc structure, and the next 1 byte describes the recorded density. Further, the next 12 bytes describe data area allocation, and the next 1 byte describes an NBCA descriptor. The next 15 bytes are reserved, the next 8 bytes are the start sector number of the border zone (Start sector number of Border Zone), and the next 2008 bytes are reserved.

  The book type and part version are described as follows. Book type is described in the 7th to 4th bits.

0000b is described when the medium is a DVD-ROM, 0001b when the medium is DVD-RAM, 0010b when the medium is DVD-R, and 0011b when the medium is DVD-RW. Version information is described in the 3rd to 0th bits. 0000b means version 0.9x, 0001b means version 1.0x, 0010b means version 1.1x, 0101b means version 2.0x, and 0110b means version 2.1x.

  The disc size and the maximum transfer rate of the disc are described as follows. Disc size is described in the 7th to 4th bits. 0000b means a 12 cm diameter disk, and 0001b means an 8 cm diameter disk. Maximum transfer rate is described in the 3rd to 0th bits. 0000b is 2.52 Mbps, 0001b is 5.04 Mbps, 0010b is 10.08 Mbps, and 1111 is not specified.

  In the disc structure, the seventh bit indicates 0, and the sixth and fifth bits indicate the number of layers. 00b means a single layer disc, and 01b means a dual layer disc. The fourth bit describes track path information. When the bit is 0b, it means a parallel track path or a single layer, and when it is 1b, it means an opposite track path. Furthermore, the third bit is set to 0b. If the second bit is 0b, this means that this disc does not contain a rewritable user data area. If it is 1b, this means that it contains a rewritable user data area. means. If the first bit is 0b, this means that this disc does not contain a recordable user data area. If it is 1b, this disc does not contain a recordable user data area. ) Is included. If the 0th bit is 0b, this means that this disc does not contain an embossed user data area, and if it is 1b, this disc contains an embossed user data area (Embossed user data area). area).

 In the above recorded density, the 7th to 4th bits are the linear density, and the 3rd to 0th bits are the track density. The linear density means 0.267 μm / bit for 0000b, 0.293 μm / bit for 0001b, and 0.409-0.435 μm / bit for 0010b. The track density is 0.74 μm / track for 0000b and 0.80 μm / track for 0001b.

  In the data area allocation described above, the start sector number of the data area, for example, 030000h is described. The last recording address of the last zone in the border area is described.

  In the NBCA descriptor, 0b of the seventh bit means that there is no NBCA, and 1b means that there is NBCA. The 6th to 0th bits are reserved.

  In the optical disc, management information called a file system is described in order to manage the files recorded on the disc. This file system includes information called a volume descriptor sequence. The volume description sequence includes information such as a partition descriptor (Partition Descriptor) and a logical volume descriptor (Logical Volume Descriptor).

  The partition descriptor (Partition Descriptor) includes a partition content field (Partition Contents field) and a partition header descriptor (Partition Header Descriptor of Partition Contents Use field).

 The partition header descriptor (Partition Header Descriptor of Partition Contents Use field) includes information called an unallocated space bitmap (Unallocated Space Bitmap).

 FIG. 5 shows a partition descriptor table. The format of this descriptor is common to DVD-RAM, DVD-RW, DVD-R, and DVD-ROM. The partition descriptor (Partition Descriptor) includes information called Partition Contents Use. This information includes information that can identify a group of DVD-RAM and DVD-RW and a group of DVD-R and DVD-ROM.

  FIG. 6 shows a partition header descriptor (Partition Header Descriptor) in the Partition Contents Use field.

  In this Partition Header Descriptor, an area of an unallocated space table (Unallocated Spaces Table), an area of an unallocated space bitmap (Unallocated Spaces Bitmap), and others are allocated.

  Here, it can be understood as follows by paying attention to the area of the unallocated space bitmap (Unallocated Spaces Bitmap).

  When the medium is DVD-RAM or DVD-RW, this Unallocated Spaces Bitmap describes a non-zero value. On the other hand, when the medium is DVD-R or DVD-ROM, 0 is described in this Unallocated Spaces Bitmap. This means that the media type can be classified from the logical format.

  FIG. 7 shows a logical volume descriptor (Logical Volume Descriptor) included in the file system of the optical disc. This Logical Volume Descriptor contains information called Map Table Length, which identifies DVD-RAM, DVD-RW, DVD-R, and DVD-ROM. can do. Map Table Length is set to 6 when the medium is DVD-RAM, 64 when DVD-RW, 70 when DVD-R, and 6 when DVD-ROM.

  FIG. 8 is a flowchart for explaining an operation example of an apparatus that effectively uses the logical format information and the physical format information. When the optical disk is loaded, the physical format information (FIG. 4) is read, the type of the disk is determined, and temporarily stored in the memory. Next, the file system is read to read an unallocated space bitmap (Unallocated Space Bitmap), which is stored in the temporary memory as logical format information 1 (step 8S2). Further, the map table length (Map Table Length) included in the system is read and stored in the temporary memory as the logical format information 2 (step 8S3).

  Next, it is determined whether or not the logical format information 1 is> 0 and the logical format information 2 = 6 (step 8S4). If it is high (YES), the loaded optical disk is assumed to be a DVD-RAM on the logical format, and the process proceeds to the process described later (step 8S5).

  However, if the determination in step 8S4 is no (NO), the process proceeds to step 8S6. Here, it is determined whether or not the logical format information 1 is> 0 and the logical format information 2 = 64 (step 8S6). If it is high (YES), the loaded optical disk is assumed to be a DVD-RW on the logical format, and the process proceeds to the process described later (step 8S7). However, if the determination in step 8S6 is no (NO), the process proceeds to step 8S8.

  Here, it is determined whether the logical format information 1 is = 0 and the logical format information 2 is 70 (step 8S8). If it is high (YES), the loaded optical disk is assumed to be a DVD-R on the logical format, and the process proceeds to the process described later (step 8S9). However, if the determination in step 8S8 is no (NO), the process proceeds to step 8S10.

  Here, it is determined whether or not the logical format information 1 is 0 and the logical format information 2 is 6 (step 8S10). If it is high (YES), the loaded optical disk is assumed to be a DVD-ROM on the logical format, and the process proceeds to the process described later (step 8S11). However, if the determination in step 8S10 is no (NO), the process proceeds to step 8S12 to perform processing as an unknown disk. For example, a warning is displayed on the display unit.

  FIG. 9 shows the processing after steps 8S5, 8S7, 8S9, and 8S11 described above.

  When it is determined that the optical disc is a DVD-RAM on the logical format, the type of media determined in step 8S1 is used after step 8S5.

  If the determination of the media type from the physical format indicates DVD-RAM (step 9S1), this type of determination result matches the determination result on the logical format. In this case, the apparatus handles an optical disc loaded as a DVD-RAM for both recording and playback. However, if the media type determination from the physical format indicates DVD-RW (step 9S2), the media type determination from the physical format does not match the determination result on the logical format. In this case, the apparatus handles an optical disk loaded as a reproduction-only DVD-RAM. Also, when the determination of the media type from the physical format indicates DVD-R (step 9S3), the determination of the media type from the physical format does not match the determination result on the logical format. Also in this case, the apparatus handles an optical disk loaded as a reproduction-only DVD-RAM.

  When it is determined that the optical disc is a DVD-RW on the logical format, the media type determined in step 8S1 is used after step 8S7.

  When the determination of the media type from the physical format indicates DVD-RAM (step 9S7), the determination of the media type from the physical format does not match the determination result on the logical format. In this case, the apparatus handles an optical disk loaded as a reproduction-only DVD-RW (step 9S10). If the determination of the media type from the physical format indicates DVD-RW (step 9S8), the determination result of this type matches the determination result on the logical format. In this case, the apparatus handles an optical disk loaded as a DVD-RW for both recording and playback (step 9S11). If the media type determination from the physical format indicates DVD-R (step 9S9), the media type determination from the physical format does not match the determination result on the logical format. In this case, the apparatus handles an optical disk loaded as a reproduction-only DVD-RW (step 9S12).

  When it is determined that the optical disc is a DVD-R on the logical format, the media type determined in step 8S1 is used after step 8S9.

  If the determination of the media type from the physical format indicates DVD-RAM (step 9S13), the determination of the media type from the physical format does not match the determination result on the logical format. In this case, the apparatus handles an optical disc loaded as a reproduction-only DVD-R (step 9S16). Even when the media type determination from the physical format indicates DVD-RW (step 9S14), the media type determination from the physical format does not match the determination result on the logical format. Also in this case, the apparatus handles an optical disk loaded as a reproduction-only DVD-RW (step 9S17). If the determination of the media type from the physical format indicates DVD-R (step 9S15), the determination result of this type matches the determination result on the logical format. In this case, the apparatus handles an optical disk loaded as a DVD-R for both recording and playback (step 9S18).

  When it is determined on the logical format that the optical disc is a DVD-ROM, the media type determined in step 8S1 is used after step 8S11.

  If the determination of the media type from the physical format indicates DVD-RAM (step 9S19), the determination of the media type from the physical format does not match the determination result on the logical format. In this case, the apparatus handles an optical disk loaded as a reproduction-only DVD-ROM (step 9S22). Even when the media type determination from the physical format indicates DVD-RW (step 9S20), the media type determination from the physical format does not match the determination result on the logical format. Also in this case, the apparatus handles an optical disk loaded as a reproduction-only DVD-ROM (step 9S23). If the determination of the media type from the physical format indicates DVD-R (step 9S21), the determination result of this type does not match the determination result on the logical format. However, in this case, the apparatus may handle an optical disk loaded as a DVD-R for both recording and playback (step 9S24).

  If the media determination is DVD-ROM, the mode shifts to the playback-only mode.

  As described above, the apparatus of the present invention determines the type (first determination result) of the optical disk from the physical format information (see FIG. 4) of the loaded optical disk (step 8S1 in FIG. 8), and the optical disk. And a means for checking the logical format (see FIGS. 5 to 7) from the file system information (FIG. 8) and determining the type of the optical disk (second determination result). And it has a determination part which determines whether the 1st determination result and the 2nd determination result have shown that it is the disk of the same kind (FIG. 9).

  Here, when the determination result of the determination means indicates that the discs are not of the same type, there is means for executing only reproduction of the recorded information of the optical disc. In addition, when the determination result of the determination unit indicates that the disc is not the same type of disc, there may be a unit for prohibiting recording information recording and editing processing on the optical disc. Furthermore, if the determination result of the determination means indicates that the disks are not of the same type, the disc type obtained from the physical format information and the disc type obtained from the logical format do not match on the display unit. It may be indicated as a message. In other words, if the determination result of the determination unit indicates that the disks are not of the same type, the display unit may have means for displaying a message indicating that there is a difference between the determination result of the physical system and the logical system. Good. This can be realized by providing a display control unit in the microcomputer block 30.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The figure which shows the whole structure of the information recording / reproducing apparatus to which this invention was applied. Explanatory drawing showing the relationship between the management information concerning this invention, and real video data. Schematic which shows the structure of the directory and file prescribed | regulated by DVD recording standard (DVD VR standard). Explanatory drawing of the physical format information in an optical disk. Explanatory drawing of the logical format information in an optical disk. An explanatory view of further logical format information in an optical disc. An explanatory view of logical format information on an optical disc. The flowchart shown in order to demonstrate the operation example of the apparatus of this invention. 9 is a flowchart showing a continuation of the flowchart shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 30 ... Microcomputer block, 31 ... Work RAM, 32 ... Directory detection part, 33 ... Management information control part at the time of edit, 34 ... Management information control part at the time of recording, 41 ... AV input part, 42 ... TV tuner, 43 ... Display unit 44... Key input unit 50. Encoder unit 51. Formatter 52. Buffer memory 60. Decoder unit 1001 Optical disc 1002 Disc drive unit 1003 Data processor unit 2001 Hard disk drive unit

Claims (6)

A first determination unit for obtaining a first determination result for identifying the type of the optical disk from the physical format information of the loaded optical disk;
A second determination unit for obtaining a second determination result for checking the logical format from the information of the file system of the optical disk and identifying the type of the optical disk;
A third determination unit that determines whether or not the first determination result and the second determination result indicate the same type of disk;
An information recording / reproducing apparatus having a function of permitting only reproduction of recorded information of the optical disk when the determination result of the third determination unit indicates that the disk is not of the same type. When the determination result of the third determination unit indicates that the disc is not the same type,
The information recording / reproducing apparatus according to claim 1, further comprising means for prohibiting recording information recording and editing processing on the optical disc. When the determination result of the third determination unit indicates that the disc is not the same type,
2. The information recording / reproducing apparatus according to claim 1, further comprising display means for displaying a message indicating that there is a difference between the physical system and logical system determination results.   2. The information recording / reproducing apparatus according to claim 1, wherein the optical disc is one of a DVD-RAM, a DVD-RW, a DVD-R, and a DVD-ROM. The determination result of the third determination unit indicates that the disc is of the same type, and when the disc is a DVD-RAM, DVD-RW, or DVD-R, it has a function of permitting recording, editing, and reproduction. The information recording / reproducing apparatus according to claim 4. A first determination result for identifying the type of the optical disk from the physical format information of the loaded optical disk, and a second determination result for checking the logical format from the file system information of the optical disk and identifying the type of the optical disk And
Determining whether the first determination result and the second determination result indicate the same type of disk;
When the determination indicates that the discs are not of the same type, only the reproduction of the recorded information on the optical disc is permitted.

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