JP4039299B2 - Recording apparatus and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording apparatus and method for recording data on a recording medium such as a DVD.
[0002]
[Prior art]
As a device for recording television broadcasts and recorded images, a DVD recorder using a recordable DVD as a medium instead of a video tape recorder is becoming popular. The recordable DVD is a recordable optical disc having a diameter of 12 cm and a thickness of 1.2 mm and having a capacity of 4.7 Gbytes on one side.
[0003]
The recordable DVD includes a write-once type (one-time recordable type) and a rewritable type (multiple-time rewritable type), DVD-R, DVD-RW, DVD + RW, DVD + R, and DVD-RAM. The following five types of formats have been proposed. These formats include “DVD Forum” which is a private standard organization of DVD (for example, see Non-Patent Document 1), and “DVD + RW Alliance” which is a private standard organization different from DVD Forum (for example, non-patent document). 2).
[0004]
DVD-R and DVD + R are write-once optical discs that can be written only once. DVD-R is an optical disc according to the format proposed by the DVD Forum, and DVD + R is an optical disc according to the format proposed by the DVD + RW Alliance.
[0005]
DVD-RW and DVD + RW are rewritable optical discs that are compatible with the format of a read-only DVD (DVD-VIDEO) defined by the “DVD Forum”. DVD-RW and DVD + RW can be reproduced even by a conventional reproduction-only DVD player. DVD-RW is an optical disc according to the format proposed by the DVD Forum, and DVD + RW is an optical disc according to the format proposed by the DVD + RW Alliance.
[0006]
A DVD-RAM is a rewritable optical disk in a format housed in a cartridge, has low compatibility with DVD-VIDEO, and is an optical disk with a format that is significantly different from other DVDs. DVD-RAM is an optical disc proposed by the DVD Forum.
[0007]
Further, in the DVD-VIDEO standard proposed by the DVD Forum, a unit called “title” is defined as a data unit. The “title” defined in this standard is a concept indicating a playback unit of one content such as one movie or one music album. According to the DVD-VIDEO standard, 99 titles can be recorded on one DVD disk.
[0008]
Also, since the DVD-VIDEO standard was originally defined assuming a read-only ROM standard, “data that constitutes a title that is played seamlessly without interruption is always recorded in a physically continuous recording area. It must be done ". That is, it is stipulated that data constituting a seamlessly reproduced title should not be recorded over a plurality of physical areas with an unrecorded area or data of another title interposed therebetween.
[0009]
[Non-Patent Document 1]
Internet <URL: http://www.dvdforum.gr.jp/>
[Non-Patent Document 2]
Internet <URL: http://www.dvdrw.com/>
[0010]
[Problems to be solved by the invention]
By the way, with DVD-RW and DVD + RW, it is possible to perform recording using a format that maintains compatibility with the DVD-VIDEO standard. When a title is recorded on DVD-RW and DVD + RW according to the DVD-VIDEO compatibility format, the recorded title can be deleted, unlike the case of ROM.
[0011]
Here, when recording and deletion of titles are repeated on DVD-RW and DVD + RW, unrecorded areas are formed discretely in the recording area in the middle of the disk. That is, an unrecorded area is generated between the titles. In order to effectively use the disc capacity, it is desirable to record a title in an unrecorded area between the titles.
[0012]
However, even if an empty area occurs between titles, if a new title is recorded in the empty area, all or part of the subsequent title may be erased by overwriting.
[0013]
Therefore, until now, when recording content data on DVD-RW and DVD + RW, a new title is placed in an unrecorded area between titles generated by deleting recorded titles. Could not be recorded.
[0014]
The present invention has been proposed in view of such circumstances, and is a format that prescribes recording of a playback unit of content such as DVD + RW and DVD-RW adopting the VEDO mode in a continuous area. Is a recording apparatus and method for recording data on a recording medium adopting the above, and provides a recording apparatus and method capable of recording data on unrecorded areas scattered in the recording medium. For the purpose.
[0015]
[Means for Solving the Problems]
A recording apparatus according to the present invention is a recording apparatus that records data on a recording medium adopting a format that defines recording of a playback unit of content in a continuous area, and content data is input thereto, The content data is encoded into a data stream corresponding to the format, a recording unit that records the encoded data stream on the recording medium, and a control unit that controls a recording position with respect to the recording medium, the control unit includes: When recording content data, the management information indicating the data recording portion of the recording medium is referred to, one continuous unrecorded area on the recording medium is selected, and the selected continuous unrecorded area is selected. Recording of the content data is started, and the copy is performed up to a predetermined recording position determined based on the end position of the continuous unrecorded area. When Ceiling data is recorded, and ends the recording of the content data.
[0016]
In this recording apparatus, one continuous unrecorded area on the recording medium is selected with reference to the management information indicating the data recording portion of the recording medium, and content data is recorded in the selected continuous unrecorded area. Do. Further, in this recording apparatus, the recording of the content data ends at a predetermined recording position determined based on the end position of the continuous unrecorded area.
[0017]
A recording method according to the present invention is a recording method for recording data on a recording medium adopting a format that prescribes recording of a playback unit of content in a continuous area, the input content data being When recording the data stream corresponding to the format and recording the encoded data stream on the recording medium, the management information indicating the data recording portion of the recording medium is referred to and 1 on the recording medium is recorded. Select two consecutive unrecorded areas, start recording the content data on the selected consecutive unrecorded areas, and store the content data up to a predetermined recording position determined based on the end position of the consecutive unrecorded areas. When recorded, the recording of the content data is terminated.
[0018]
In this recording method, one continuous unrecorded area on the recording medium is selected with reference to the management information indicating the data recording portion of the recording medium, and content data is recorded in the selected continuous unrecorded area. Do. Further, in this recording method, the recording of the content data is terminated at a predetermined recording position determined based on the end position of the continuous unrecorded area.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a DVD recorder to which the present invention is applied will be described as an embodiment of the present invention.
[0020]
FIG. 1 shows a block diagram of a DVD recorder 10 according to an embodiment of the present invention.
[0021]
The DVD recorder 10 according to the embodiment of the present invention records an AV signal (video / audio signal) reproduced from a television broadcast or a recording tape on a DVD disk, and reproduces and outputs the AV signal from the DVD disk. Device.
[0022]
The DVD recorder 10 has been proposed by the DVD-VIDEO, DVD-R, DVD-RW, and the DVD + RW Alliance, which is a private standard organization for DVDs, as proposed by the “DVD Forum”, which is a private standard organization for DVDs. It is a multi-type disc recorder capable of recording and reproducing with respect to DVD + R and DVD + RW. Hereinafter, these DVD discs that can be recorded and reproduced by the DVD recorder 10 are collectively referred to as a DVD disc 1.
[0023]
The internal configuration of the DVD recorder 10 will be described with reference to FIG.
[0024]
The DVD recorder 10 includes a video input terminal (Vin), an audio input terminal (Ain), a video output terminal (Vout), an audio output terminal (Aout), a digital interface terminal (DVin), and a video A / D converter. 11, a video D / A converter 12, an audio A / D converter 13, and an audio D / A converter 14.
[0025]
The video input terminal (Vin) is connected to a tuner, a set top box, a video signal reproducing device, and the like via a video cable. A video signal, which is a video signal of a predetermined video format such as NTSC or PAL, is input from these devices to the video input terminal (Vin). The video signal input to the video input terminal (Vin) is converted from an analog signal to a digital signal by the video A / D converter 11 and input to the apparatus. The video output terminal (Vout) is connected to a television monitor, a video signal recording device, or the like via a video cable. The video output terminal (Vout) outputs a video signal which is a video signal of a predetermined video format such as NTSC or PAL to these devices. The video signal output from the video output terminal (Vout) is converted from a digital signal to an analog signal by the video D / A converter 12 and output to the outside of the apparatus.
[0026]
The audio input terminal (Ain) is connected to a tuner, a set top box, an audio signal reproduction device, and the like via an audio cable. For example, an audio signal which is a sound music signal of a predetermined format is input to the audio input terminal (Ain) from these devices. The audio signal input to the audio input terminal (Ain) is converted from an analog signal to a digital signal by the audio A / D converter 13 and input to the apparatus. The audio output terminal (Aout) is connected to an audio device, an audio signal recording device, or the like via an audio cable. The audio output terminal (Aout) outputs, for example, an audio signal which is a sound music signal of a predetermined format to these devices. The audio signal output from the audio output terminal (Vout) is converted from a digital signal to an analog signal by the audio D / A converter 14 and output outside the apparatus.
[0027]
The digital interface terminal (DVin) is connected to a DV player that reproduces AV data (video data and audio data) from a DV tape cassette via, for example, an IEEE1394 terminal or an interface cable for digital data transmission such as USB. AV data (DV data) in DV format reproduced by the DV player from the DV tape cassette is input to the digital interface terminal (DVin).
[0028]
The DVD recorder 10 includes an NTSC / PAL decoder 15, a DV decoder 16, an MPEG encoder 17, an MPEG decoder 18, a graphic synthesis circuit 19, and an NTSC / PAL encoder 20.
[0029]
The NTSC / PAL decoder 15 receives a video signal such as NTSC or PAL format input from the video input terminal (Vin) and digitized by the video A / D converter 11 as an ITU-R BT. The video signal is converted to a 601 format video signal.
[0030]
The DV decoder 16 converts DV data input from the digital interface terminal (DVin) into ITU-R BT. A video signal of 601 format and an audio signal of a predetermined format are converted.
[0031]
MPEG encoder 17 is an ITU-R BT. A video signal of 601 format and an audio signal of a predetermined format digitized by the audio A / D converter 13 are input, these are compressed and encoded by the MPEG-2 system, and the MPEG-2 system AV data stream (MPEG -2 stream).
[0032]
The MPEG decoder 18 receives an MPEG-2 stream, decompresses and decodes the stream, and outputs an ITU-R BT. A video signal of 601 format and an audio signal of a predetermined format are generated.
[0033]
The graphic synthesis circuit 19 is an ITU-R BT. Processing for synthesizing an externally input on-screen display image (OSD image) is performed on the display screen of the 601 format video signal.
[0034]
The NTSC / PAL encoder 20 is an ITU-R BT. A 601 format video signal is converted into an NTSC or PAL format video signal and output from a video output terminal (Vout).
[0035]
The DVD recorder 10 also includes a switching circuit 21 that switches the transmission path of the video signal and the audio signal.
[0036]
The switching circuit 21 switches the transmission path between recording and reproduction, and further switches the transmission path between DV data and other signals during recording.
[0037]
Specifically, the switching circuit 21 switches the path as follows. In other words, when recording a signal other than DV data, the switching circuit 21 supplies the video signal output from the NTSC / PAL decoder 15 to the MPEG encoder 17 and the graphic synthesis circuit 19, and from the audio A / D converter 13. The transmission path is switched so that the output audio signal is supplied to the MPEG encoder 17 and the audio D / A converter 14. When recording DV data, the switching circuit 21 supplies the video signal output from the DV decoder 16 to the MPEG encoder 17 and the graphic synthesis circuit 19, and the audio signal output from the DV decoder 16 is converted to the MPEG encoder. 17 and the audio D / A converter 14 so that the transmission path is switched. For reproduction, the switching circuit 21 supplies the video signal output from the MPEG decoder 18 to the graphic synthesis circuit 19 and supplies the audio signal output from the MPEG decoder 18 to the audio D / A converter 14. The transmission path is switched as follows.
[0038]
Further, the DVD recorder 10 includes a buffer circuit 22 and a drive device 23.
[0039]
The buffer circuit 22 is a memory that temporarily stores an MPEG-2 stream and a control data stream that are recorded on and reproduced from the DVD disk 1. The drive device 23 is a device on which the DVD disk 1 is loaded and which physically accesses the loaded DVD disk 1 to record and reproduce data. The control data stream is a data stream including information information defined in the format of the DVD disc 1.
[0040]
The DVD recorder 10 also includes a VBI slice circuit 24.
[0041]
The VBI slice circuit 24 is a circuit that detects information information (VBI information) included in the blanking period of the video signal from the video signal input from the video input terminal (Vin).
[0042]
Further, the DVD recorder 10 includes an input device 25 and a system controller 26.
[0043]
The input device 25 is an input device such as an infrared remote controller, for example, and is a device on which information input for operating the DVD recorder 10 is performed by a user. Information input from the input device 25 is supplied to the system controller 26.
[0044]
The system controller 26 is a control block including a microcomputer that performs setting and control for each circuit described above.
[0045]
Specific processing performed by the system controller 26 includes, for example, the following.
[0046]
For example, the system controller 26 reads the control data stream from the buffer circuit 22 and performs access control, display control, and the like for the DVD disk 1 based on the control data. The system controller 26 records or generates control information related to the recorded data at the start or end of data recording, and records the control information on the DVD disk 1 as a data stream according to the format. The system controller 26 generates header information of the MPEG-2 stream and analyzes the header information.
[0047]
Further, the system controller 26 generates an OSD image such as a menu screen, for example, supplies the generated OSD image to the graphic synthesis circuit 19 and displays the OSD image on the television monitor. Further, the system controller 26 appropriately updates the OSD image according to the input information from the input device 25, and displays the changed OSD image on the television monitor. The system controller 26 performs various controls according to the input from the input device 25, and performs predetermined control determined based on the currently displayed OSD image and the input information currently input.
[0048]
Further, the system controller 26 is supplied with VBI information detected from the input video signal from the VBI slice circuit 24, and supplies necessary information to the MPEG encoder 17 among a plurality of pieces of information indicated in the VBI information. Then, the header information of the MPEG-2 stream is encoded. During playback, the system controller 26 generates VBI information based on necessary information among the information detected from the header information of the MPEG-2 stream, supplies the generated VBI information to the NTSC / PAL encoder 20 and outputs it. The video signal to be encoded is encoded at a predetermined blanking position.
[0049]
The recording operation of the DVD recorder 10 having the above configuration is as follows.
[0050]
At the time of recording, a video signal and an audio signal are input to the DVD recorder 10 from the outside. The input video signal is transmitted to the ITU-R BT.1 by the NTSC / PAL decoder 15 or the DV decoder 16. It is converted into a video signal of 601 format. ITU-R BT. The 601 format video signal is supplied to the MPEG encoder 17 via the switching circuit 21, and is encoded into an MPEG-2 stream together with the audio signal. The buffer circuit 22 temporarily stores the MPEG-2 stream encoded by the MPEG encoder 17 and also temporarily stores the control data stream generated by the system controller 26. In the DVD recorder 10, the drive device 23 reads the MPEG-2 stream and the control data stream from the buffer circuit 22 in the order according to the format of the DVD disk 1, and records the read data on the DVD disk 1.
[0051]
Further, the DVD recorder 10 also performs the following operation so that the user can monitor the video and audio being recorded in real time.
[0052]
The NTSC / PAL decoder 15 or DV decoder 16 performs ITU-R BT. The video signal converted into the 601 format is also supplied to the graphic synthesis circuit 19 via the switching circuit 21. The video signal supplied to the graphic synthesis circuit 19 is synthesized with the OSD image when the OSD image is output by the system controller 26, and is supplied to the NTSC / PAL encoder 20 as it is when the OSD image is not output. Is done. ITU-R BT. Supplied to the NTSC / PAL encoder 20. The 601 format video signal is converted to an NTSC or PAL format video signal, converted to an analog signal, and output to the outside. The input audio signal is converted to an analog signal via the switching circuit 21 and then output to the outside.
[0053]
The operation of the DVD recorder 10 during playback is as follows.
[0054]
At the time of reproduction, the drive device 23 reads the MPEG-2 stream and the control data stream from the DVD disk 1 and stores them in the buffer circuit 22. The MPEG-2 stream stored in the buffer circuit 22 is read by the MPEG decoder 18, and the control data stream is read by the system controller 26. The read MPEG-2 stream is sent to the ITU-R BT. It is decoded into a video signal and an audio signal in the 601 format. The decoded audio signal is converted to an analog signal via the switching circuit 21 and then output to the outside. The decrypted ITU-R BT. The 601 format video signal is supplied to the graphic synthesis circuit 19 via the switching circuit 21. The video signal supplied to the graphic synthesis circuit 19 is synthesized with the OSD image when the OSD image is output by the system controller 26, and is supplied to the NTSC / PAL encoder 20 as it is when the OSD image is not output. Is done. ITU-R BT. Supplied to the NTSC / PAL encoder 20. A 601 format video signal is converted to an NTSC or PAL format video signal, converted to an analog signal, and then output to the outside. Further, the system controller 26 performs, for example, control of the reading position of the disk and various display controls according to the read control data stream.
[0055]
Next, recording control processing by the system controller 26 when recording AV data on a DVD-RW disc in real time (for example, real time recording of a video signal) will be described.
[0056]
First, the format of the DVD-RW disc as a premise will be described.
[0057]
DVD-VIDEO compatible formats adopted for DVD-RW discs include a ROW (Restricted Overwrite Mode) mode and an INC (Incremental Recording Mode) mode.
[0058]
FIG. 2 shows a file on the disc when content data is recorded in the ROW mode. 2A shows a file recorded on the disc after finalization, and FIG. 2B shows a file recorded on the disc before finalization.
[0059]
Note that finalization refers to a process of recording necessary management data, dummy data, and the like other than content data on a disc so that the data can be reproduced by a reproduction-only DVD player.
[0060]
As shown in FIGS. 2A and 2B, a file system & VMG area 31 and a VTS area 32 are formed in the recording area 30 of the DVD-RW disc.
[0061]
The file system & VMG area 31 is formed on the inner circumference side of the disk, that is, on the recording start address (address 0h) side in the recording area. In the file system & VMG area 31, a UDF (Universal Disc Format) file system and a VMG (Video Manager) defined in the DVD-VIDEO format are recorded. The UDF file system describes information such as the start position and size, file name, recording date and time of each file including VMG. The VMG is a file in which information such as the recording address of each VTS recorded in the VTS area 32 and the number of VTSs is described.
[0062]
The VTS area 32 is formed on the outer peripheral side of the disc from a position (address 600h or 3000h) offset by a predetermined amount from the recording start address (address 0h). In the VTS area 32, one or a plurality of VTSs (Video Title Sets) are recorded. One VTS is a file set formed for one title. The VTS is composed of three files: VTSI # n, VOBS # n, and BUP # n. Here, “#n” indicates the title number of the title recorded in the VTS area 32 and is an integer from 1 to 99.
[0063]
VTSI # n is a file including management information of the VTS. BUP # n is a backup file of VTSI # n. VOBS # n is a file including VTS entity data, that is, an MPEG-2 data stream.
[0064]
Note that the DVD-VIDEO standard stipulates that VOBS # n must be recorded in a continuous recording area. Furthermore, it is specified that the VTS must be recorded in the order of VTSI # n, VOBS # n, and BUP # n in the recording direction (that is, in the address direction).
[0065]
The UDF file system and VMG in the file system & VMG area 31 are written at the time of finalization. That is, before finalization, the UDF file system and VMG are not written on the DVD-RW disc.
[0066]
Here, in the ROW mode of the DVD-RW, as shown in FIG. 2B, management information in the intermediate state (hereinafter referred to as “B”) can be accessed even before finalization. , TMP_VMGI) is recorded from a predetermined address position in the file system & VMG area 31. The TMP_VMGI describes information such as the recording address of each VTS recorded in the VTS area 32, the recording date and time of the VTS, the number of VTSs, and the like.
[0067]
Such TMP_VMGI is updated when recording information in the VTS area 32 is updated, such as when a new VTS is recorded, the title content of the VTS is updated, or the VTS is deleted. Therefore, if the system can read the management information (TMP_VMGI) in the intermediate state, it is possible to record and add a recorded title even before finalization.
[0068]
FIG. 3 shows a file on the disc when content data is recorded in the INC mode. FIG. 3A shows a file recorded on the disc after finalization, and FIG. 3B shows a file recorded on the disc before finalization.
[0069]
In the INC mode, as shown in FIG. 3A, the UDF file system and VMG are recorded in the file system & VMG area 31, and one or more VTSs are recorded in the VTS area 32, as in the ROW mode. .
[0070]
However, in the INC mode, TMP_VMGI is recorded in the VTS area 32 as shown in FIG. When a new VTS is recorded, TMP_VMGI is recorded in an area between VTSI # n and VOBS # n in the VTS. In addition, when the contents of the VTS are updated without recording a new VTS (for example, when the VOBS is deleted, the title is changed, etc.), it is recorded at the outermost peripheral position of the currently recorded area. The Therefore, if the information in the VTS is updated a plurality of times, a plurality of TMP_VMGIs are recorded in different areas, but the TMP_VMGI on the outer peripheral side may be handled as valid information.
[0071]
Further, in the DVD-RW disc, in addition to the above-mentioned recording in the ROW mode and INC mode, as an extended format, as shown in FIG. 4 (A), as shown in FIG. An extension format capable of recording extension files has been proposed. This extended format is employed in addition to each of the ROW mode and INC mode.
[0072]
In the DVD-RW disc, when such an extended format is adopted, information called an unused area management correspondence table (TMP_SBM) is described in TMP_VGMI. As shown in FIG. 4B, the unused area management correspondence table (TMP_SBM) is information that represents a flag for identifying a data recorded area and an unrecorded area in the VTS area 32 in units of ECC blocks. is there.
[0073]
Next, recording control processing by the system controller 26 when AV data is recorded in real time in the above format will be described.
[0074]
When performing real-time recording of AV data, first, as a pre-processing, the system controller 26 refers to the unused area management correspondence table (TMP_SBM) and stores the contents in the content recording area (VTS area 32) of the DVD-RW disc. Then, one free space (continuous unrecorded area) is selected.
[0075]
Specifically, as shown in FIG. 5, the system controller 26 refers to the unused area management correspondence table (TMP_SBM), recognizes one or more continuous unrecorded areas, and determines the maximum from those continuous unrecorded areas. One unrecorded area of size is selected. Then, the start address (S.ADD) and end address (E.ADD) of the selected unrecorded area are recognized.
[0076]
When a normal format that does not record an extended file such as JPEG data is adopted, one unrecorded area of the maximum size is selected with reference to the latest TMP_VMGI. Here, the maximum size unrecorded area is selected. However, when the user designates an unrecorded area, the designated continuous unrecorded area may be selected.
[0077]
Subsequently, when a recording operation is performed, the system controller 26 generates VOBS # n by encoding the input AV data for the selected one continuous unrecorded area as shown in FIG. Recording of the generated VOBS # n is started. At that time, recording of VOBS # n is started from the head address (S.ADD) with a margin sufficient for VTSI # n to be recorded. The size of VTSI # n changes depending on the time length of the recorded content in VOBS # n, the number of I pictures, and the like. Therefore, the capacity of the margin is assumed to be the capacity in the maximum case assuming the maximum case of VTSI # n. Alternatively, the margin capacity is estimated based on the size of the selected continuous unrecorded area and the compression rate of the video data, and the maximum value of VTSI # n is calculated based on the maximum recordable time. The capacity may be determined based on the maximum value.
[0078]
When recording is performed in the INC mode, VTBS # n and TMP_VMGI start recording VOBS # n with a margin sufficient for recording.
[0079]
Subsequently, the system controller 26 continues the encoding process of the input AV data and the recording of VOBS # n until the recording end operation is performed.
[0080]
Here, as shown in FIG. 7, when reaching the predetermined recording end position, the system controller 26 forcibly ends the recording operation even if the user does not perform the recording end operation. The predetermined recording end position is an address position where an unrecorded area is left from the end address (E.ADD) by a margin sufficient to record BUP # n. That is, the predetermined recording end position is an address position obtained by subtracting the margin capacity from the end address (E.ADD).
[0081]
When the recording end operation or the above-described forced end operation is performed, the system controller 26 subsequently records VTSI # n in the margin of the previous area of the recorded VOBS # n as shown in FIG. At the same time, the system controller 26 records BUP # n in the margin of the area after the recorded VOBS # n, as shown in FIG. If recording is performed in the INC mode, TMP_VMGI is recorded together with VTSI # n.
[0082]
When the above processing is completed, the system controller 26 updates the intermediate management information (TMP_VMGI) and the unused area management correspondence table (TMP_SBM), and ends the real-time recording operation.
[0083]
As described above, in the DVD recorder 10 according to the embodiment of the present invention, one continuous unrecorded area is selected with reference to the unused area management correspondence table (TMP_SBM) and TMP_VGMI of the DVD-RW, and the selected continuous unrecorded area is selected. VOBS in the VTS is recorded in the recording area. Further, the DVD recorder 10 ends the VOBS recording at a predetermined recording position determined based on the end position (E.ADD) of the continuous unrecorded area.
[0084]
Therefore, with the DVD recorder 10 according to the present invention, a new title can be recorded even in an empty space created by erasing a recorded title.
[0085]
In this embodiment, the case where content is recorded on a DVD-RW has been described. However, the present invention can also be applied to a DVD + RW. In the case of DVD + RW, there is no VTSI_IFO and VTSI_BUP before and after the AV data of each title, AV data of each title is continuously arranged as a whole disc, and VTSI_IFO and VTSI_BUP are arranged before and after that. Therefore, it is not necessary to consider the margin of VTSI_IFO and VTSI_BUP for the start address (S.ADD) and end address (E.ADD) of the selected unrecorded area.
[0086]
【The invention's effect】
In the recording apparatus and method according to the present invention, one continuous unrecorded area on the recording medium is selected with reference to the management information indicating the data recording portion of the recording medium, and the selected continuous unrecorded area is selected. Record content data. Further, in this recording method, the recording of the content data is terminated at a predetermined recording position determined based on the end position of the continuous unrecorded area.
[0087]
For this reason, in the recording apparatus and method according to the present invention, it is possible to record content data even in an empty space created by erasing recorded data. For this reason, even for an optical disc adopting a format that prescribes recording of a playback unit of content such as a DVD-RW in a continuous area, data can be recorded in an empty area in the gap of the disk. Data can be recorded efficiently.
[Brief description of the drawings]
FIG. 1 is a block diagram of a DVD recorder according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining a format (ROW mode) of a DVD-RW disc.
FIG. 3 is a diagram for explaining a format (INC mode) of a DVD-RW disc.
FIG. 4 is a diagram for explaining an extended format of a DVD-RW disc.
FIG. 5 is a diagram showing an unrecorded area of a maximum size selected by a controller among one or a plurality of unrecorded areas of a DVD-RW disc.
FIG. 6 is a diagram showing a recording start position of VOBS recorded in a selected unrecorded area.
FIG. 7 is a diagram showing a recording end position of VOBS recorded in a selected unrecorded area.
FIG. 8 is a diagram illustrating a state after VOBS, VTSI, and BUP are recorded.
[Explanation of symbols]
1 DVD disk, 10 DVD recorder, 15 NTSC / PAL decoder, 16 DV decoder, 17 MPEG encoder, 18 MPEG decoder, 19 graphic synthesis circuit, 20 NTSC / PAL encoder, 21 switching circuit, 22 buffer circuit, 23 drive circuit, 24 VBI slice circuit, 25 input device, 26 system controller

Claims (20)

In a recording apparatus for recording data on a recording medium adopting a format that specifies recording of a playback unit of content in a continuous area,
Recording means for inputting content data, encoding the content data into a data stream corresponding to the format, and recording the encoded data stream on the recording medium;
Control means for controlling the recording position with respect to the recording medium,
The control means includes
When recording content data,
With reference to the management information indicating the data recording portion of the recording medium, one continuous unrecorded area on the recording medium is selected,
Start recording the content data for the selected continuous unrecorded area,
The recording apparatus according to claim 1, wherein when the content data is recorded up to a predetermined recording position determined based on an end position of the continuous unrecorded area, the recording of the content data is terminated. The control means includes
At the time of real-time recording of content data, the continuous unrecorded area is selected, the recording of the content data is started with respect to the selected continuous unrecorded area, and a predetermined value determined based on the end position of the continuous unrecorded area 2. The recording apparatus according to claim 1, wherein when the content data is recorded up to a recording position, the recording of the content data is terminated. The above format stipulates that the management data of the content data is recorded in the area preceding the substance data of the content data,
The control means includes
Start recording the actual data of the content data with a recording margin of the management data from the start position of the continuous unrecorded area,
3. The recording apparatus according to claim 2, wherein the management data of the content data is recorded with respect to the recording margin after the entity data is recorded. The control means includes
Calculate the maximum recording time of the entity data based on the size of the continuous unrecorded area,
Based on the calculated maximum recording time, estimate the data size of the management data,
4. The recording apparatus according to claim 3, wherein the size of the recording margin is determined based on the estimated data size of the management data. The above format stipulates that the management data of the content data is recorded in the subsequent area of the actual data of the content data,
The control means includes
End the recording of the substance data of the content data with an interval of the recording margin of the management data until the end position of the continuous unrecorded area,
3. The recording apparatus according to claim 2, wherein the management data of the content data is recorded with respect to the recording margin after the entity data is recorded. The control means includes
2. The recording apparatus according to claim 1, wherein one continuous unrecorded area is selected from a plurality of continuous unrecorded areas on the recording medium based on a user instruction. The control means includes
2. The recording apparatus according to claim 1, wherein the size of a plurality of continuous unrecorded areas existing on the recording medium is determined, and a continuous unrecorded area having the maximum size is selected from them. The recording apparatus according to claim 1, wherein the recording medium is a DVD-RW disc. The recording apparatus according to claim 1, wherein the management information is intermediate management information recorded before finalization. The recording apparatus according to claim 9, wherein the management information is an unused area management correspondence table in the intermediate management information. In a recording method for recording data on a recording medium adopting a format that specifies recording of a playback unit of content in a continuous area,
Encoding the input content data into a data stream corresponding to the format, and recording the encoded data stream on the recording medium,
With reference to the management information indicating the data recording portion of the recording medium, one continuous unrecorded area on the recording medium is selected,
Start recording the content data for the selected continuous unrecorded area,
When the content data is recorded up to a predetermined recording position determined based on the end position of the continuous unrecorded area, the recording of the content data is terminated. At the time of real-time recording of the content data, the continuous unrecorded area is selected, the recording of the content data is started with respect to the selected continuous unrecorded area, and a predetermined value determined based on the end position of the continuous unrecorded area 12. The recording method according to claim 11, wherein when the content data is recorded up to the recording position, recording of the content data is terminated. The above format stipulates that the management data of the content data is recorded in the area preceding the substance data of the content data,
Start recording the actual data of the content data with a recording margin of the management data from the start position of the continuous unrecorded area,
13. The recording method according to claim 12, wherein the management data of the content data is recorded with respect to the recording margin after the entity data is recorded. Calculate the maximum recording time of the entity data based on the size of the continuous unrecorded area,
Based on the calculated maximum recording time, estimate the data size of the management data,
14. The recording method according to claim 13, wherein the recording margin is determined based on the estimated data size of the management data. The above format stipulates that the management data of the content data is recorded in the subsequent area of the actual data of the content data,
End the recording of the substance data of the content data with an interval of the recording margin of the management data until the end position of the continuous unrecorded area,
13. The recording method according to claim 12, wherein the management data of the content data is recorded with respect to the recording margin after the entity data is recorded. 12. The recording method according to claim 11, wherein one continuous unrecorded area is selected from a plurality of continuous unrecorded areas on the recording medium based on a user instruction. 12. The recording method according to claim 11, wherein the size of a plurality of continuous unrecorded areas existing on the recording medium is determined, and the continuous unrecorded area having the maximum size is selected among them. 12. The recording method according to claim 11, wherein the recording medium is a DVD-RW disc. 12. The recording method according to claim 11, wherein the management information is intermediate management information recorded before finalization. 20. The recording method according to claim 19, wherein the management information is an unused area management correspondence table in the intermediate management information.

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