JP4016321B2 - Optical disc device, optical disc recording method, optical disc recording method program, and recording medium recording optical disc recording method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disc apparatus, an optical disc recording method, an optical disc recording method program, and a recording medium on which an optical disc recording method is recorded, and can be applied to, for example, a DVD (Digital Video Disk) device. The present invention updates the position information indicating the start address of the unrecorded area in response to the deletion of the file recorded on the optical disc, for example, when recording a file other than a moving image and updating the file, etc. In addition, the life of the optical disk can be extended.
[0002]
[Prior art]
Conventionally, in a DVD that is a large-capacity optical disc, writable optical discs can be written only once, such as a DVD-R (DVD-Recordable), a recordable DVD-RW (DVD-Rewritanle), a DVD-RAM (DVD-RAM). Random Access Memory) is provided. Among these optical discs, DVD-R and DVD-RW are adapted to be reproduced by a reproduction-only DVD player or computer by recording video data in a format compliant with the DVD video format.
[0003]
FIG. 7 is a chart showing the logical format of the optical disc in the DVD video format. In the optical disc of this format, the information recording surface is divided into a lead-in (Lead in), a data zone (Data Zone), and a lead-out (Lead out) from the innermost side which is the head side (FIG. 7A), and data Desired video data or the like is recorded in the zone.
[0004]
The data zone is divided into a UDF (Universal Disk Format) area (file system area) A1, a VMG (Video Manager) area (DVD management information area) A2, and a real-time data recording area A3 from the lead-in side. The UDF area and the VMG area are management information recording areas for managing files based on video data recorded on the optical disc. Of these UDF area and VMG area, the VMG area is an area corresponding to the DVD player, and records TOC information that is management information for managing the entire video data recorded in the real-time data recording area A3. . On the other hand, the UDF area A1 is an area corresponding to a computer file management system, and management information for managing the entire video data recorded in the real-time data recording area A3 in a format compatible with the file system in the computer. To be recorded.
[0005]
The real-time data recording area A3 is a program area for recording actual data, and video data is recorded in units of VTS (Video Title Set) (hereinafter referred to as a title as appropriate) (FIG. 7B). . Here, up to 99 VTSs can be provided. Here, the VTS is composed of VTSI (Video Title Set Information), VTSM VOBS (Video Object Set for the VTSM), VTSTT VOBS (Video Object Set for Titles in a VTS), and VTSI BUP (Backup of VTSI) from the head side. (FIG. 7C). In the VTSTT VOBS, video data in the format of MPEG (Moving Picture Experts Group) 2 which is actual data is recorded, and in the VTSI, recording position information which is management information for managing video data based on the actual data is recorded. In the VTSM VOBS, a title menu of video data is recorded. Note that VTSM VOBS is an option. The VTSI BUP is a backup of VTSI.
[0006]
Thus, in this type of optical disc, when accessing by a computer, a desired file can be searched and reproduced by UDF. When accessing by a DVD player, a desired file is searched by VMG. And is made available for playback. Thus, UDF constitutes management information for video data recorded on the optical disc corresponding to the file management system of the computer, whereas VMG manages video data recorded on the optical disc corresponding to the DVD player. It is designed to compose information.
[0007]
As a method for writing video data onto such an optical disc, an incremental recording method (hereinafter referred to as an INC method) and a restricted over write method (hereinafter referred to as a ROW method) are used. Here, the INC system is a system for recording video data sequentially, and the ROW system is a system applied to an overwritable optical disc. However, even in the ROW method, when data is recorded in an unrecorded area, video data is recorded sequentially. In the INC system and the ROW system, an RMA (Recording Management Area) provided on the inner peripheral side of the lead-in is used to manage an area by padding or the like which will be described later.
[0008]
FIG. 8 is a chart showing a recording procedure by the ROW method. In the ROW method, lead-in, UDF, VMG, VTSI of the first title, and VTSM VOBS recording areas are secured in advance by padding (FIG. 8A). Here, the padding is a process for securing an area by recording dummy data such as NULL.
[0009]
If these areas are secured in this way, in the ROW system, VTSTT VOBS is formed by actual data by sequentially recording video data (FIG. 8B), and recording of actual data for one title is performed. Upon completion, VTSI BUP is recorded, and padding processing is executed to secure recording areas for VTSI and VTSM VOBS of the subsequent title (FIG. 8B). Subsequently, returning to the head side, VTSI and VTSM VOBS corresponding to the recording of the actual data are formed (FIG. 8C). Thus, in the ROW method, one VTS is recorded on the optical disc.
[0010]
When the next title is recorded continuously, in the ROW method, the VTSTTVOBS and VTSI BUP are formed by recording actual data following the padding area formed by the immediately preceding VTS, and the VTSI and VTSMVOBS areas of the subsequent title are formed. In order to ensure, padding processing is executed (FIG. 8D). Subsequently, VTSI and VTSM VOBS are formed (FIG. 8E), and the subsequent VTS is recorded on the optical disc (FIG. 8F). In the ROW system, when a title is continuously recorded, processing such as padding is similarly performed to sequentially record VTSs.
[0011]
On the other hand, in the ROW method, a UDF area and a VMG area are formed by a finalizing process for an optical disc in which a VTS is sequentially recorded and a real-time data recording area is formed in this way, and further lead-in and lead-out are performed. (FIG. 8G), and thereby compatibility with a reproduction-only optical disc is achieved. The UDF area and VMG area are formed by generating UDF and VMG data from the VTSI and VTSM VOBS data of each title and recording this data in the head area on the inner periphery secured by padding. Is done.
[0012]
[Problems to be solved by the invention]
By the way, it can be considered that such an optical disk is applied to a portable video recorder or the like instead of the magnetic tape. In this case, since some conventional portable video recorders can record not only moving images but also still images, this type of optical disc can also record still images other than moving images. Is desired.
[0013]
As a method for realizing this demand, moving images are recorded in the DVD video format and management information is recorded in UDF and VMG. For files other than moving images, management information is recorded only in UDF, and moving image files are recorded. At the same time, it may be possible to record on an optical disk. In other words, in this way, in a file management system using a computer or the like, all files recorded in the real-time data recording area, which is a program area, can be reproduced by using UDF as a reference. In the DVD player, by accessing the real-time data recording area based on the VMG, files other than this kind of moving image can be recorded without affecting the reproduction by the DVD player.
[0014]
In the recording by the ROW method or the like, the management information necessary for creating such UDF or VMG is temporarily recorded on the optical disc in a format different from that of the moving image, and thus the ROW method or the like is used. Even a recorded optical disk can be finalized and reproduced by a DVD player.
[0015]
In addition, by using a format different from that for moving images, management information other than moving images is temporarily recorded on an optical disc, so that even if a finalizing process is not performed, the conventional DVD recorder does not play any moving images. Files other than this type of video can be recorded without affecting them.
[0016]
In this type of optical disc, data recording in the real-time data recording area is managed using RMA, and thus RMA is also used for temporary recording of management information for files other than moving images. Can be managed. That is, in the RMA, an NWA (Next Writable Address) is provided, and if this NWA indicates the start address of an unrecorded area, if the management information is recorded on the basis of this NWA, the optical disk may be changed during the process. Even if it is transferred to the optical disc apparatus, the recording position of this type of file can be confirmed by this NWA.
[0017]
However, in the processing of files other than moving images, there is a risk that the updating process may be repeated many times, as in the case of image processing in a computer. It is necessary to update the management information. On the other hand, in NWA, it is stipulated that the address can be updated only in an increasing direction by originally assuming that a moving image file is additionally recorded on the optical disc.
[0018]
As a result, when a file other than a movie is recorded in this way and this file is updated, the management information is repeatedly recorded in the same location, and only rewriting such management information is necessary. There is a problem that optical discs reach the end of their lives.
[0019]
The present invention has been made in consideration of the above points. For example, when a file other than a moving image is recorded and this file is updated, an optical disc apparatus capable of extending the life of the optical disc, an optical disc recording method, An optical disc recording method program and an optical disc recording method recording medium are proposed.
[0020]
[Means for Solving the Problems]
In order to solve such a problem, in the invention of claim 1, on the basis of the position information indicating the start address of the unrecorded area recorded on the inner periphery of the optical disc, the file is sequentially recorded from the start area side of the optical disc, The present invention is applied to an optical disc apparatus that updates position information corresponding to file recording, and the position information is updated corresponding to deletion of a file recorded on the optical disc.
[0021]
In the invention of claim 6, the file is recorded sequentially from the head area side of the optical disk on the basis of the position information indicating the head address of the unrecorded area recorded on the inner periphery of the optical disk, and the file is recorded. Then, the position information is updated in response to the deletion of the file recorded on the optical disk by applying the method to the optical disk recording method for updating the position information.
[0022]
According to the invention of claim 11, the file is sequentially recorded from the head area side of the optical disk on the basis of the position information indicating the head address of the unrecorded area recorded on the inner periphery of the optical disk, and the file is recorded. Then, the position information is updated in response to the deletion of the file recorded on the optical disk by applying to the program of the optical disk recording method for updating the position information.
[0023]
In the invention of claim 16, the file is sequentially recorded from the head area side of the optical disk on the basis of the position information indicating the head address of the unrecorded area recorded on the inner periphery of the optical disk, and the file is recorded. Then, the program of the optical disc recording method for updating the position information is applied to the recording medium, and the program of the optical disc recording method updates the position information in response to the deletion of the file recorded on the optical disc.
[0024]
According to the configuration of the first aspect, the file is sequentially recorded from the head area side of the optical disk on the basis of the position information indicating the head address of the unrecorded area recorded on the inner periphery of the optical disk, and the file recording is supported. The position information is repeatedly applied to the optical disk apparatus that updates the position information, and the position information is updated in response to the deletion of the file recorded on the optical disk. When recording management information or the like based on the above, it is possible to prevent the management information from being repeatedly recorded in the same location. For example, a file other than a moving image is recorded, and this file is updated. In this case, the life of the optical disk can be extended.
[0025]
Thus, according to the configurations of claims 6, 11 and 16, for example, when a file other than a moving image is recorded and this file is updated, the optical disc recording method can extend the life of the optical disc. An optical disc recording method program and a recording medium on which the optical disc recording method is recorded can be provided.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
[0027]
(1) Configuration of the embodiment
FIG. 2 is a block diagram showing the recording / reproducing apparatus according to the embodiment of the present invention. This recording / reproducing apparatus is a portable camera-integrated recording apparatus, and a recording / reproducing system using an optical disk device is provided instead of a recording / reproducing system using a magnetic tape in a conventional camera-integrated video tape recorder. Yes.
[0028]
That is, in the recording / reproducing apparatus 11, the camera unit 12 images a desired subject via a lens and outputs video data based on the imaging result. In this process, the camera unit 12 switches the operation under the control of the system block 16, and selectively outputs video data based on moving images and video data based on still images.
[0029]
The video encoder 13 compresses and outputs the video data obtained from the camera unit 12. In this process, the video encoder 13 switches its operation in conjunction with the camera unit 12 under the control of the system block 16. When video data is output from the camera unit 12 as a moving image, the video encoder 13 compresses the data according to the MPEG2 format. Output. On the other hand, when video data of a still image is output from the camera unit 12, the data is compressed in the JPEG format and output.
[0030]
The microphone unit 14 acquires and amplifies an audio signal with a microphone, and outputs it as a digital signal. The audio encoder 15 compresses and outputs the audio signal based on the digital signal.
[0031]
The video decoder 21 inputs video data reproduced from the optical disc 18 via the system block 16 during reproduction, decompresses the video data in accordance with the recording format, and outputs it to the display unit 19 and line output. Output. The audio decoder 22 inputs audio data reproduced from the optical disk 18 via the system block 16 during reproduction, decompresses the audio data, and outputs the data to the audio processing unit 20 and line output.
[0032]
When the imaging result is monitored, the display unit 19 inputs video data output from the camera unit 12 via the system block 16, and drives the liquid crystal display panel with the video data. Thereby, the monitor image of the imaging result is displayed. On the other hand, at the time of reproduction, the liquid crystal display panel is driven by the video data output from the video decoder 21, thereby displaying the monitor image of the reproduction result. When monitoring the imaging result, the audio processing unit 20 inputs audio data output from the microphone unit 14 via the system block 16 and drives a speaker or the like with the audio. As a result, an audio signal for monitoring is output. On the other hand, at the time of reproduction, a speaker or the like is driven by audio data output from the audio decoder 22, thereby outputting a reproduction audio signal for monitoring.
[0033]
The drive block 17 constitutes an optical disk device together with the optical disk 18, and is connected to the system block 16 by ATAPI (AT Attachment Packet Interface). The drive block 17 switches the operation by a command output from the system block 16 by this ATAPI by executing firmware installed in advance, and records the output data of the system block 16 on the optical disk 18. The data recorded on the optical disk 18 is reproduced, and the reproduction data obtained as a result is output to the system block 16.
[0034]
The system block 16 is a controller that controls the overall operation of the recording / reproducing apparatus 11, and outputs various commands to the drive block 17 and the like in response to a user operation by executing a predetermined processing program installed in advance. Thus, the imaging result is recorded on the optical disc 18, and the imaging result recorded on the optical disc 18 and the imaging result obtained from the camera unit 12 can be monitored.
[0035]
That is, the system block 16 time-division multiplexes the video data and audio data output from the video encoder 13 and the audio encoder 15 at the time of recording the imaging result, outputs the multiplexed data to the drive block 17, and records it on the optical disk 18. Further, video data and audio data output from the camera unit 12 and the microphone unit 14 are directly output to the display unit 19, the audio processing unit 20, and the line output for monitoring.
[0036]
Also, when reproducing the imaging result recorded on the optical disc 18, the reproduction data obtained from the drive block 17 is separated into audio data and video data and output to the video decoder 21 and the audio decoder 22 contrary to the recording.
[0037]
In such a series of processing, the system block 16 instructs the drive block 17 to switch the operation mode to the extended file mode when the user instructs recording of a still image, and the camera unit 12 and the video encoder 13. Is instructed to process a still image, whereby a still image file is recorded on the optical disc 18 instead of a moving image file.
[0038]
Here, the extended file mode is an operation mode in which an extended file other than a moving image is recorded in the drive block 17. In this embodiment, a still image file is applied as the extended file. In the following, a mode for recording a normal moving image file is referred to as a moving image file mode in comparison with the extended file mode.
[0039]
FIG. 3 is a chart for explaining these moving image file mode and extended file mode, taking as an example the case of a so-called virgin disc in which no file is recorded. When the power supply is turned on with the optical disk 18 still loaded, or when the optical disk 18 is loaded with the power turned on, the drive block 17 is recorded on the inner circumference side of the optical disk 18. The management information is acquired and stored in the memory, and a part of the management information is output to the host device. As a result, in this type of optical disc apparatus, the host device can instruct the reproduction of various files recorded on the optical disc 18.
[0040]
When the optical disk 18 is a virgin disk, since data such as UDF and VMG has not yet been recorded, in this case, the drive block 17 acquires RMA information as management information and stores it in the memory. Further, the system block 16 as the host device is notified that no file is recorded on the optical disc 18 as management information.
[0041]
When the user selects to record the imaging result, the system block 16 instructs the drive block 17 to wait for recording. When the optical disk 18 is a virgin disk according to this instruction, the drive block 17 executes padding processing. , UDF and VMG areas are secured. In the moving image file mode, the following title VTSI and VTSM VOBS areas are secured by the padding process (FIG. 3A). Also, by these processes, the RMA data stored in the memory is updated so that the position indicated by the NWA is a position that follows the padding end point.
[0042]
When the trigger switch for starting recording is operated by the user, the system block 16 instructs the drive block 17 to start recording, and outputs multiplexed data based on video data and audio data. In response to this instruction, the output data of the system block 16 is recorded on the basis of the value of NWA. In the moving image file mode, the multiplexed data sequentially input is recorded on the optical disc 18 to record the moving image file. When the stop of the recording is instructed by the user's operation of the trigger switch, the system block 16 instructs the drive block 17 to end the recording and stops the transmission of the multiplexed data. The recording of the actual data on the optical disk 18 is finished according to the instruction.
[0043]
As a result, VTSTT VOBS is recorded in the video file mode, and the drive block 17 generates management information based on the address information of the recording start position of the VTSTT VOBS, the file size, the recording date and time, and the like. Record in the area following VTSTT VOBS to form VTSI BUP. In order to record a further title, VTSI and VTSM VOBS areas are secured by padding (FIG. 3B). Also, the NWA value is updated corresponding to these processes.
[0044]
Further, management information is sequentially recorded from a position returned by a predetermined area from the recording start position of the VTSTT VOBS, thereby forming VTSI and VTSM VOBS, thereby completing the recording of one title (FIG. 3 (C )). In these processes, the drive block 17 records the title management information in the memory and holds it.
[0045]
Thus, when recording a moving image subsequently, the system block 16 similarly controls the operation of each unit, and the drive block 17 repeats the same processing by this command. Files are sequentially recorded by the same ROW method.
[0046]
On the other hand, when the recording of the still image is instructed by the user, the system block 16 instructs the drive block 17 to switch the operation mode to the extended file mode. The actual data recording start position is set at the head position of the secured area. Further, when the start of recording is instructed by the user operating the trigger switch, the system block 16 instructs the drive block 17 to start recording, acquires still image video data from the camera unit 12, and this video data The multiplexed data is output to the drive block 17.
[0047]
As a result, the drive block 17 sequentially records multiplexed data of still images from the head position of the area secured by padding, records a still image file, and notifies the system block 16 of the completion of processing when the recording is completed. By this notification, when the user subsequently operates the trigger switch, the system block 16 similarly instructs the drive block 17 to start recording, and outputs multiplexed data based on still image video data to the drive block 17. . The drive block 17 also records the still image file in the subsequent area. As a result, the recording / reproducing apparatus 11 records still image files as many as desired by the user.
[0048]
When the still image file is recorded in this way and the user instructs the end of the still image recording mode, the system block 16 instructs the drive block 17 to switch the operation mode. In the extended file mode, the drive block 17 generates intermediate management information DK for the continuous still image file recorded on the optical disc and records it on the optical disc 18 in accordance with this instruction. Subsequently, padding processing is executed to secure VTSI and VTSM VOBS areas (FIG. 3D). The intermediate management information DK is recorded and held in the memory, and the NWA held in the memory is updated so as to correspond to the series of processes. As a result, the recording / reproducing apparatus 11 records the intermediate management information DK immediately before the area specified by the NWA so that the recording position of the intermediate management information DK can be specified by the NWA.
[0049]
Here, the intermediate management information DK is temporary management information until a UDF is created for a plurality of extended files recorded immediately before, and is a summary of the management information of the plurality of files. It is. The intermediate management information DK is configured by address information, file name, file size, time information, etc. of the recording start position of each file, and thereby the desired file recording start position and file size from the intermediate management information DK. This file can be played back based on the detection result.
[0050]
As a result, when the system block 16 and the drive block 17 record the still image file in this way and then record the moving image file again, the actual data and the VTSI BUP are transferred after the padded area in the same manner as described above. Recording is performed, and an area is secured by padding (FIG. 3E), VTSI and VTSM VOBS are recorded (FIG. 3F), and VTS is recorded thereby (FIG. 3G).
[0051]
FIG. 4 is a chart for explaining the intermediate management information DK. The intermediate management information DK is recorded collectively for each attribute of the extended file recorded continuously. That is, as shown in FIG. 4B, the intermediate management information includes a header and file management information DJ, DM7, and DM4 for each attribute. For example, after recording three files FJ1, FJ2, and FJ3 using JPEG according to user instructions, subsequently recording two files FM71 and FM72 using MPEG7, and then recording two files FM41 and FM42 using MPEG4 (FIG. 4 (A)), the intermediate management information DK indicates the recording of these three types of files by the recording of the header, and the recording of each subsequent file management information DJ, DM7, DM4 by the recording of the header. The location is indicated. Here, symbols DJ, DM7, and DM4 indicate file management information according to JPEG, MPEG7, and MPEG4, respectively.
[0052]
The file management information DJ for each attribute is recorded for each file management information DFJ1, DFJ2, and DFJ3 as shown in FIG. 4C, and as shown in FIG. Corresponding extended file attribute information, address information ADDR, size information, time information, and the like are assigned to the management information DFJ1.
[0053]
In this embodiment, the recording / playback apparatus 11 uses a JPEG still image file as the extension file, and the optical disk 18 recorded by the recording / playback apparatus 11 has such a file for each attribute. For the management information, only the file management information DJ shown in FIG. 4B is created.
[0054]
Thus, even when a file other than a moving image is recorded on the optical disc 18, the recording / reproducing apparatus 11 records the file and the corresponding management information as a set in the program area. At this time, if the file to be recorded on the optical disc 18 is a moving image file, the management information, the file, and the management information backup information are sequentially recorded, whereas the still image file, which is a file other than the moving image, is recorded on the optical disc. In the case of recording in the file 18, the file and the management information are sequentially recorded, whereby the recording format of the management information is switched according to the attribute of the file.
[0055]
Further, by managing a plurality of extension files collectively by using one intermediate management information DK, the user can be managed by one directory to improve user convenience.
[0056]
On the other hand, when finalization is instructed by the user, in the system block 16, finalization is instructed to the drive block 17, and in the drive block 17, all files recorded on the optical disc 18 are stored in the memory. UDF data is generated from the information. For only the moving image file recorded on the optical disc 18, VMG data is generated from the management information stored in the memory. Further, seek is first performed in the reserved area, and the UDF and VMG data are recorded to generate UDF and VMG. Further, lead-in and lead-out are generated, thereby completing the finalizing process (FIG. 3 (H)).
[0057]
On the other hand, when the user instructs to eject the optical disk without finalizing, the system block 16 instructs the drive block 17 to eject the optical disk 18, and the drive block 17 is sequentially updated by the series of processes described above. After the RMA of the optical disk 18 is updated by the NWA thus formed, the optical disk 18 is ejected.
[0058]
In these series of processes, the drive block 17 initially updates the management information acquired from the optical disc 18 in accordance with the file recording on the optical disc 18 and notifies the updated information to the system block 16. As a result, the system block 16 can instruct the drive block 17 to reproduce the file immediately after recording, and can further instruct to delete the file.
[0059]
FIG. 5 is a chart for explaining processing related to such file deletion and the like in comparison with FIG. When a moving image file and an extended file that is a still image file are sequentially recorded on the virgin disc, in this case, the area following the intermediate management information DK of the last recorded still image file EF is the head of the unrecorded area. In the NWA, the drive block 17 sequentially updates and finally holds the value indicating the head address (FIGS. 5A to 5F).
[0060]
In this state, for example, when the last recorded still image file EF is deleted, the still image file EF and the subsequent intermediate management information DK are recorded in the drive block 17 by updating the management information stored in the memory. The area is set as an unrecorded area (FIG. 5G), and in the subsequent recording of the extended file, the extended file and the corresponding intermediate management information are recorded by overwriting in this unrecorded area (FIG. 5). 5 (H) to (J)). Note that, instead of setting the unrecorded area by updating the management information, information recorded on the optical disc may be erased to set the unrecorded area.
[0061]
In the system block 16 according to this embodiment, when the last recorded file is deleted for each piece of intermediate management information, the recording position information specified by the NWA value is placed at the head following the deletion command. A command for returning to the drive side is output to the drive block 17. Also, the drive block 17 updates the value of the NWA so as to specify the head position that can be recorded by the deletion by this command (FIG. 5 (G)). As a result, in the recording / reproducing apparatus 11, the position information indicating the head position of the unrecorded area is updated in response to the deletion of the file recorded on the optical disc 18.
[0062]
Thus, when the recording of the extension file is instructed following the system block 16, the drive block 17 sequentially records the extension file according to this instruction, records the intermediate management information DK, and corresponds to these recordings. The value of NWA is updated. Thereby, in the recording / reproducing apparatus 11, the frequency of recording the intermediate management information DK in the same place is remarkably reduced as compared with the case where the NWA value is not returned to the head area side even if erasure and recording are repeated. Thus, the life of the optical disk 18 can be extended accordingly. The NWA update is executed on the memory, and the drive block 17 records the NWA update in the memory on the optical disk 18 when the optical disk 18 is ejected or when the power is shut off. .
[0063]
On the other hand, when deleting some of the plurality of extension files managed by one intermediate management information DK, the system block 16 instructs the deletion of the extension file corresponding to the drive block 17. In response to this instruction, the drive block 17 updates the intermediate management information DK so as to correspond to the deletion of the corresponding file, and additionally writes it on the optical disc 18. Further, the NWA held in the memory is updated so as to correspond to this.
[0064]
In this deletion process, when the system block 16 instructs the deletion of the file recorded immediately before the intermediate management information DK, the drive block 17 replaces the additional recording of the intermediate management information DK with this file. The intermediate management information is recorded from the top of the unrecorded area that occurs in the deletion, thereby actually deleting the extension file recorded on the optical disc 18, and the recording position of the intermediate management information is moved to the top side, Make effective use of the information recording surface. Correspondingly, the value of NWA is returned to the head side.
[0065]
Accordingly, FIG. 1 is a flowchart for explaining the erasure process of the recording / reproducing apparatus 11 related to the NWA update. In the recording / reproducing apparatus 11, when the user instructs to delete the extended file, the process proceeds from step SP1 to step SP2 to instruct the system block 16 to delete the file corresponding to the drive block 17, and the drive block 17 File to be deleted. Further, in the subsequent step SP3, it is determined whether or not there is a plurality of extension files that are not deleted but remain, which are collectively managed by the intermediate management information of the files related to deletion.
[0066]
If a negative result is obtained here, the process proceeds to step SP4. In this case, in the intermediate management information of the file related to this deletion, there is no file to be managed, so that the NWA is transferred from the system block 16 to the drive block 17. In response to this, the drive block 17 updates the value of the NWA so that the NWA indicates the head of the deleted portion.
[0067]
As a result, the recording / reproducing apparatus 11 updates the NWA corresponding to the deletion process, and then proceeds to step SP5 to end the processing procedure.
[0068]
On the other hand, if a positive result is obtained in step SP3, the process proceeds to step SP6, where the intermediate management information is updated so as to correspond to this deletion process, and this intermediate management information is additionally written. At this time, if the file to be deleted is the last file, intermediate management information is recorded following the extended file. Subsequently, the process proceeds to step SP7, where the NWA is updated so as to correspond to these processes, and the process proceeds to step SP5 where the process procedure is terminated.
[0069]
(2) Operation of the embodiment
In the above configuration, in the recording / reproducing apparatus 11 (FIG. 2), when the optical disk 18 is loaded by the user with the power turned on, and when the power is turned on with the optical disk 18 loaded, In the drive block 17, various management information recorded on the optical disk 18 is acquired and held, and a part of the management information is notified to the system block 16.
[0070]
When the optical disc 18 is a read-only optical disc created by a stamper, and further when the optical disc 18 is an optical disc that has been finalized and recorded only with a moving image file, the drive block 17 includes an optical disc by this series of processing. VMG data, which is management information for the DVD player recorded on the inner circumference side of 18 is acquired, and the file recorded on the optical disk 18 is notified to the system block 16 from this management information. Thus, in the recording / reproducing apparatus 11, when the user instructs the reproduction of the optical disc 18, the system block 16 instructs the reproduction of the file corresponding to the drive block 17, and the drive block 17 applies the data of the VMG to the optical disc 18. The recorded data is played back, and this playback data is provided to the user via the system block 16, the video decoder 21, the audio decoder 22, the display unit 19, and the audio processing unit 20.
[0071]
On the other hand, when the optical disc 18 is a recordable virgin disc, the RMA data of the optical disc 18 is acquired by the drive block 17 by the access of the optical disc 18 when the optical disc 18 is loaded or the power is turned on. 16 is notified that no file is recorded on the optical disk 18. In the recording / reproducing apparatus 11, when the moving image shooting mode is selected by the user, the operation mode of the drive block 17 is switched to the moving image file mode by the system block 16. As a result, in the drive block 17, an area for forming the UDF and VMG and an area for generating the VTSI and VTSM VOBS of the first VTS are secured by the padding process.
[0072]
In this state, when the start of recording is instructed by the user, the video data of the moving image obtained from the camera unit 12 is compressed by MPEG2 in the video encoder 13, and the audio data output from the microphone unit 14 is output by the audio encoder 15. Data is compressed. Further, the video data and audio data that have been compressed are multiplexed by the system block 16. In the recording / reproducing apparatus 11, after a recording command is output from the system block 16 to the drive block 17, the multiplexed data generated in this way is sequentially output to the drive block 17. In the drive block 17, the multiplexed data is sequentially recorded on the optical disc 18 following the area secured by padding, and the recording is stopped by a recording stop instruction from the user.
[0073]
Thereby, in the recording / reproducing apparatus 11, VTSTT VOBS constituting one title is recorded on the optical disc 18, and management information is generated in the drive block 17 according to the recording start position, file size, etc. of this VTSTT VOBS. Information is then recorded on the optical disc 18 to form a VTSI BUP region. Further, the area for generating the VTSI and VTSM VOBS of the subsequent VTS is secured by padding, and the management information is recorded by returning to the area for generating the VTSI and VTSM VOBS previously secured, thereby recording the VTSI and VTSM VOBS. Regions are formed.
[0074]
In the recording / reproducing apparatus 11, one title of video data based on moving images is recorded. As a result, when recording a moving image file, the recording / reproducing apparatus 11 uses the DVD video format in which the management information by VTSI, the management information by VTSM VOBS, the file, and the management information by VTSI BUP are continuous. The file is recorded. This management information is held in the memory of the drive block 17.
[0075]
In the recording / reproducing apparatus 11, when recording of a moving image is subsequently instructed by the user, titles are sequentially recorded on the optical disc 18 by repeating similar processing. In addition, when a title is sequentially recorded in this way and an optical disc that has not yet been finalized is loaded, the RMA data and the optical disc 18 based on the NWA that is the RMA data are initially stored. As a result of the scanning, the management information recorded in pairs with the title is sequentially acquired and held in the memory of the drive block 17, and the title following the end of the title detected by scanning the optical disc is recorded.
[0076]
In the recording / reproducing apparatus 11, the management information obtained by scanning the optical disk 18 in this way and the management information held in the memory when the title is recorded on the optical disk 18 are finalized optical disks. Similarly, the system block 16 is notified so that the file immediately after recording and the file recorded by another optical disc apparatus can be detected by the system block 16 and reproduced by the drive block 17. . Further, by updating the NWA held in the memory in accordance with the NWA detected at the time of scanning the optical disc 18 and corresponding to the recording of the moving image file on the optical disc 18, the moving image is recorded in the unrecorded area that continues in the drive block 17. A file can be recorded.
[0077]
For this reason, in the recording / reproducing apparatus 11, when the user instructs to eject the optical disk 18, and further instructs to turn off the power, the RMA data stored in the memory and sequentially updated is stored in the memory. Is updated.
[0078]
In the recording / reproducing apparatus 11, when a title is recorded in this way and a finalization process is instructed by the user, UDF and VMG data are generated by management information forming a pair with the title recorded in the memory. These are recorded in the inner peripheral area secured on the optical disc 18, and lead-in and lead-out are formed. As a result, this optical disc is set to be reproducible by an optical disc apparatus that supports only the normal DVD format.
[0079]
On the other hand, when the user selects the still image shooting mode, the system block 16 switches the operation mode of the drive block 17 to the extended file mode. Thereby, in the virgin disc, the UDF and VMG areas are secured by padding. In the camera unit 12 and the video encoder 13, the operation mode is switched so as to acquire video data based on a still image and compress the data using JPEG.
[0080]
In this state, when the user gives an instruction to start recording of a still image, multiplexed data based on the still image compressed in this way by JPEG is sequentially output to the drive block 17 and recorded on the optical disk 18.
[0081]
The recording / reproducing apparatus 11 first secures the VTSI and VTSM VOBS areas and records the actual data when recording a moving image, whereas it does not secure such an area when recording a still image. Record actual data from still images. Further, when the user instructs to record a still image, the subsequent still image is recorded on the optical disc 18 in the same manner. In addition, for each of these recordings, the recording position of each file is recorded in the memory.
[0082]
In the recording / reproducing apparatus 11, as many files as desired are recorded on the optical disk in this way, and the end of the extended file mode is notified from the system block 16 to the drive block 17 by switching the operation mode by the user. As a result of this notification, the management information based on the recording position and the like held in the memory is recorded as temporary intermediate management information up to finalization in the subsequent area for the plurality of files. Thereby, in the recording / reproducing apparatus 11, when a file other than a moving image is recorded, the file and the management information are recorded in the order of the file and the corresponding management information. The recording format of management information is switched.
[0083]
As a result, the recording / reproducing apparatus 11 can record on the optical disc 18 files such as still images that are not defined in the DVD video format. When the optical disk 18 recorded in this way is loaded into a DVD recorder that supports only the normal DVD video format, the management information is detected according to the DVD video format such as VTSI by a search at the time of loading or the like. By reproducing the VTS, it is possible to prevent the moving image reproduction from affecting the file such as the still image recorded in this way and the corresponding management information. As a result, on the optical disc recorded in this manner, a moving image file can be reproduced by a normal DVD recorder.
[0084]
On the other hand, according to the optical disc apparatus that supports files other than moving images such as the recording / reproducing apparatus 11, it is possible to reproduce still image files. That is, when such an optical disk 18 is loaded, the recording / reproducing apparatus 11 reproduces not only VTS and VTSM VOBS data but also management information for still image files from the optical disk 18 by the initial search of the optical disk 18. The file block information stored in the memory of the drive block 17 and part of the management information is notified to the system block 16.
[0085]
As a result, for example, the titles of moving images and still images recorded on the optical disc 18 in accordance with user instructions can be provided to the user. In addition, when the user gives an instruction to reproduce a moving image in response to a reproduction instruction, the corresponding moving image file is reproduced in the same manner as described above for the reproduction-only optical disc using the VTS and VTSM VOBS data.
[0086]
On the other hand, when the user instructs the reproduction of the still image file, the recording position of the corresponding file is detected from the intermediate management information stored in the memory, and the data sequentially recorded on the optical disc 18 is detected based on the detection result. Playback is performed to generate playback data based on a still image. In the recording / reproducing apparatus 11, when processing the reproduction data as a still image in the processing of the reproduction data, the processing of the video decoder 21 is switched so that the video data compressed by JPEG is decompressed. The video data based on the still image can be confirmed by the display unit 19 and further output to an external device.
[0087]
Such a file of still images or the like is generally smaller in file size than a file of moving images, whereas in the recording / reproducing apparatus 11, intermediate management information DK which is such management information is stored. A plurality of files are created and recorded together (FIG. 4). As a result, the recording / reproducing apparatus 11 can reduce the decrease in the recording area due to the recording of the management file when the extended file such as the still image file is recorded.
[0088]
Further, when a plurality of files are recorded together in this way, they are recorded together for each type of file that is an attribute of the file, thereby simplifying search processing, finalization processing described later, and the like. It is made like that.
[0089]
In the recording / reproducing apparatus 11, the moving image and still image files are recorded on the so-called virgin disk, the optical disc that has only been recorded with the moving image and has not been finalized yet, and the optical disc that has recorded the moving image and still image files and has not yet been finalized. Are sequentially recorded by user operation.
[0090]
On the other hand, when finalization is instructed by the user for an optical disc on which moving images and still images are recorded in this way, management information, intermediate management information, moving images and still images obtained from the optical disc and held in the memory The UDF data for the computer is created by the management information and the intermediate management information created by recording the image and stored in the memory, and this data is recorded in an area secured in advance on the optical disc 18. Also, VMG data for the DVD player is generated from only the management information for the moving image file and is recorded on the optical disc 18 in the same manner.
[0091]
As a result, in the recording / reproducing apparatus 11, the management information for each set is collectively recorded for all the files recorded on the optical disk 18 in the computer UDF area in the management information recording area of the optical disk 18. On the other hand, in the DVD VMG area, management information for each set is collectively recorded only for a moving image file that is a file having a specific attribute recorded on the optical disc.
[0092]
Thus, when the finalized optical disk is reproduced from a DVD player, the file recorded on the optical disk 18 is reproduced with reference to the VMG area for DVD. Thus, it is possible to reliably reproduce a moving image in the DVD video format without affecting the reproduction of the moving image.
[0093]
When the finalized optical disk is reproduced by a computer, UDF is a file management format corresponding to the file management system of the computer. In the computer, each file is reproduced by UDF (FIG. 5). In addition to moving image files, files such as still images can be played back and used.
[0094]
By the way, in the state before finalization in this way, when the optical disc 18 having recorded the extended file in this way is loaded in another DVD recorder, in order to detect the intermediate management information in this DVD recorder, the NWA is eventually used. The location indicated by is used as a reference.
[0095]
As a result, if the NWA can be updated only in the direction in which the address increases, the NWA can be updated only when a file having a larger file size than the original file is recorded when the originally recorded file is deleted. As a result, the intermediate management information is repeatedly recorded at the same location in repeated file updates or the like.
[0096]
FIG. 6 is a chart showing this state. After recording the VTS with padding on the virgin disc (FIGS. 6A to 6D), the extended file EF is recorded (FIG. 6E). This is a case where the intermediate management information DK is recorded (FIG. 6F). Here, when the intermediate management information DK is recorded, the NWA indicates an area following the intermediate management information DK as indicated by an arrow, and even when the extended file EF is deleted (FIG. 6 (H)). In addition, even when recording and deletion are repeated for a file having a file size shorter than that of the original file (FIGS. 6H to 6J), no value is updated and held. As a result, the intermediate management information DK based on the NWA is repeatedly recorded at the same location. In the example of FIG. 6, the intermediate management information DK is recorded immediately before the location specified by the NWA.
[0097]
On the other hand, in this embodiment, when deleting a plurality of files managed by one intermediate management file recorded at the end from the beginning of the unrecorded area designated by the NWA, When the recordable area becomes continuous from the recording start side, a command for returning the NWA to the beginning of the file deleted from the system block 16 is sent, and the NWA is updated in the drive block 17 in response to this command. Is done.
[0098]
Accordingly, as shown in FIG. 5 in comparison with FIG. 6, at the recording position of the intermediate management information DK specified by the NWA, the file size of the extended file is increased each time the file and the intermediate management information DK are deleted. Accordingly, various changes can be made, and repeated recording of the intermediate management information DK in the same location can be prevented. As a result, the life of the optical disc 18 can be extended accordingly.
[0099]
On the other hand, when one of the extended files managed together by one intermediate management file is deleted as described above, in the recording / reproducing apparatus 11, the intermediate management file is stored by the drive block 17 so as to correspond to this deletion. It is added. In this process, when the last file of the extended files managed in this way is deleted, the intermediate management information is used from the head area of the deleted file instead of such additional processing. The DK is recorded, and the NWA is updated on the drive block 17 side to correspond to this. As a result, in the optical disc 18, the consumption of the recording area due to the repetition of additional writing is reduced, and the information recording surface can be used effectively accordingly.
[0100]
(3) Effects of the embodiment
According to the above configuration, in response to the deletion of the file recorded on the optical disc, by updating the NWA that is the position information indicating the start address of the unrecorded area, for example, a file other than a moving image is recorded. When updating a file, the life of the optical disk can be extended.
[0101]
At this time, such update processing is executed with the position information held in the memory, and when the optical disk is ejected or when the power is shut off, the position information of the optical disk is updated with the position information held in the memory. The update frequency can be reduced, and the life of the optical disk can be extended accordingly.
[0102]
Further, since the position information is NWA in the DVD video format, a file such as a still image can be recorded in addition to the recording of the moving image in the DVD video format.
[0103]
That is, when the file and the file management information are paired, and the file is a moving image file, the file and the management information are changed so that the file management information, the file, and the backup information for the management information are successively arranged. If the file is a non-video file, record the file and management information so that the file is in the order of the corresponding management information, and the recording position of the management information can be specified by position information. Thus, in addition to recording a moving image in the DVD video format, a file such as a still image can be recorded.
[0104]
(4) Other embodiments
In the above-described embodiment, the case where the intermediate management information is recorded immediately before the NWA has been described. However, the present invention is not limited to this, and the intermediate management information is set so as to have a certain relationship with the NWA. It can be widely applied to recording.
[0105]
In the above-described embodiment, the case where intermediate management information, which is temporary management information until finalization, is applied as management information to be recorded together with the file has been described. However, the present invention is not limited to this, and finalization is performed. In the following, the present invention can be widely applied to recording of management information that can be used.
[0106]
In the above-described embodiment, a case has been described in which management information is collectively recorded on an optical disc for a plurality of extended files recorded immediately before. However, the present invention is not limited to this, and the optical disc has been described so far. The present invention can be widely applied to the case where management information is recorded on the optical disc collectively for all the extension files recorded in the above, and further to the case where a management file is recorded for each file.
[0107]
In the above-described embodiment, the case where a still image file is recorded as an extension file has been described. However, the present invention is not limited to this, and for example, a moving image file, a text file, and a map data file in a format different from VTS. In the extended file, various files can be widely applied.
[0108]
In the above-described embodiment, the case where a series of processing is executed by a processing program installed in advance in the system block and the drive block has been described. However, the present invention is not limited to this, and via a network such as the Internet. When this kind of processing procedure is executed by installing the downloaded program on a computer, etc., and also when this kind of processing procedure is executed by installing the program provided by various recording media, etc. Can do. As such a recording medium, a recording medium such as a magnetic disk, an optical disk, or a magnetic tape can be applied.
[0109]
In the above-described embodiments, the case where the present invention is applied to a recording / reproducing apparatus having an imaging function has been described. However, the present invention is not limited thereto, and when this type of processing is executed by a computer application program, etc. Can also be widely applied.
[0110]
【The invention's effect】
As described above, according to the present invention, in response to the deletion of the file recorded on the optical disc, the position information indicating the start address of the unrecorded area is updated, for example, a file other than a moving image is recorded. When updating a file, the life of the optical disk can be extended.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a processing procedure in an optical disc apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 3 is a chart for explaining recording of an extended file in the recording / reproducing apparatus of FIG. 2;
FIG. 4 is a chart for explaining intermediate management information.
FIG. 5 is a chart for explaining extension file update processing;
FIG. 6 is a chart for explaining an extension file update process when NWA is not updated;
FIG. 7 is a chart for explaining a DVD video format.
FIG. 8 is a chart for explaining recording by a ROW method.
[Explanation of symbols]
11 ... Recording / reproducing device, 16 ... System block, 17 ... Drive block, 18 ... Optical disk

Claims (16)

Based on position information indicating the start address of the unrecorded area recorded on the inner periphery of the optical disk, the file is sequentially recorded from the start area side of the optical disk, and the position information is updated corresponding to the recording of the file. In the optical disk device
An optical disc apparatus that updates the position information in response to deletion of a file recorded on the optical disc. Holding the position information recorded on the optical disc in a memory;
By recording and deleting files on the optical disc, the location information held in the memory is updated,
2. The optical disk apparatus according to claim 1, wherein the position information of the optical disk is updated with the position information held in the memory when the optical disk is ejected or when the power is turned off. 2. The optical disc apparatus according to claim 1, wherein the position information is NWA in a DVD video format. Combining the file with the management information for the file,
When the file is a video file, the file and the management information are recorded so that the management information of the file, the file, and the backup information of the management information are successively arranged,
When the file is a file other than a moving image, the file and the management information are arranged in the order of the file and the corresponding management information, and the recording position of the management information can be specified by the position information. The optical disc apparatus according to claim 1, wherein: A record capable of specifying the recording position of the management information by the position information,
5. The optical disc apparatus according to claim 4, wherein the recording position specified by the position information is a position that follows the recording end position of the management information. Based on position information indicating the start address of the unrecorded area recorded on the inner periphery of the optical disk, the file is sequentially recorded from the start area side of the optical disk, and the position information is updated corresponding to the recording of the file. In an optical disk recording method,
A method of recording an optical disc, wherein the position information is updated in response to deletion of a file recorded on the optical disc. Holding the position information recorded on the optical disc in a memory;
By recording and deleting files on the optical disc, the location information held in the memory is updated,
7. The optical disk recording method according to claim 6, wherein the position information of the optical disk is updated with the position information held in the memory when the optical disk is ejected or when the power is shut off. 7. The optical disk recording method according to claim 6, wherein the position information is NWA in a DVD video format. Combining the file with the management information for the file,
When the file is a video file, the file and the management information are recorded so that the management information of the file, the file, and the backup information of the management information are successively arranged,
When the file is a file other than a moving image, the file and the management information are arranged in the order of the file and the corresponding management information, and the recording position of the management information can be specified by the position information. The method of recording an optical disk according to claim 6, wherein: A record capable of specifying the recording position of the management information by the position information,
10. The optical disk recording method according to claim 9, wherein the recording position specified by the position information is a position following the recording end position of the management information. Based on position information indicating the start address of the unrecorded area recorded on the inner periphery of the optical disk, the file is sequentially recorded from the start area side of the optical disk, and the position information is updated corresponding to the recording of the file. In an optical disc recording method program,
A program for an optical disk recording method, wherein the position information is updated in response to deletion of a file recorded on the optical disk. Holding the position information recorded on the optical disc in a memory;
By recording and deleting files on the optical disc, the location information held in the memory is updated,
12. The program for recording an optical disk according to claim 11, wherein the position information of the optical disk is updated with the position information held in the memory when the optical disk is ejected or when the power is shut off. 12. The program according to claim 11, wherein the position information is NWA in a DVD video format. Combining the file with the management information for the file,
When the file is a video file, the file and the management information are recorded so that the management information of the file, the file, and the backup information of the management information are successively arranged,
When the file is a file other than a moving image, the file and the management information are arranged in the order of the file and the corresponding management information, and the recording position of the management information can be specified by the position information. 12. The program for recording an optical disk according to claim 11, wherein the program is recorded. A record capable of specifying the recording position of the management information by the position information,
15. The program according to claim 14, wherein the recording position specified by the position information is a position that follows the recording end position of the management information. Based on position information indicating the start address of the unrecorded area recorded on the inner periphery of the optical disk, the file is sequentially recorded from the start area side of the optical disk, and the position information is updated corresponding to the recording of the file. In a recording medium on which a program of an optical disk recording method is recorded,
The program of the recording method of the optical disc is
A recording medium recording a program of an optical disk recording method, wherein the position information is updated in response to deletion of a file recorded on the optical disk.

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