JP2008016153A - Recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording/reproducing device capable of automatically overwriting into the same disk many times. <P>SOLUTION: This device is provided with a mode information recording means for recording mode information indicating an optical disk exclusive for information overwrite recording into a re-recordable optical disk, and a control means for performing control so as to record information up to the information recording capacity of the optical disk when mode information has been recorded in the optical disk, and to overwrite in the optical disk when more information is recorded in the optical disk. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus capable of recording and reproducing information.

VTRs that can record and play back video information are known.
Also, DVD-RW and DVD-RAM discs are known as DVD discs that record information including video information and can be re-recorded by erasing or overwriting the recorded information.

For a DVD-RW disc written in disc-at-once mode that cannot be rewritten or appended once written, the data recorded in the recording management data can be rewritten while the data area remains. There is known an apparatus for changing to a restricted overwrite mode in which rewriting and additional writing can be performed any number of times (Patent Document 1).

Further, in recordable disk media such as a magneto-optical disk, the past data is erased only in the reproduction time position range corresponding to the length of the time when the data was recorded, starting from the reproduction time position as the recording start position. An apparatus is also known (Patent Document 2).
JP 2004-326942 A Japanese Unexamined Patent Publication No. 7-287967

However, the conventional apparatus has a problem that it is necessary to manually change the mode and that recording is stopped when data is recorded in the entire data area.
SUMMARY OF THE INVENTION An object of the present invention is to provide a recording / reproducing apparatus capable of automatically overwriting on the same disk over and over again.

In order to achieve the above object, a recording / reproducing apparatus of the present invention is a recording / reproducing apparatus for recording and reproducing information on a re-recordable optical disc,
Mode information recording means for recording mode information indicating that the optical disc is an optical disc dedicated to overwrite recording of the information on the optical disc;
When the mode information is recorded on the optical disc, the information is recorded to the recording capacity of the information on the optical disc, and when the information is further recorded on the optical disc, the information is recorded on the optical disc. Control means for controlling overwriting and

It is provided with.
Further, the recording of the information is performed from the innermost circumference to the outermost circumference of the optical disc,
The overwriting is performed from the innermost circumference of the optical disc after the information is recorded to the outermost circumference of the optical disc.
And you can use it without worrying about the remaining capacity of the disc.
In addition, mode information indicating that the optical disk is an optical disk dedicated for overwriting recording of the information is recorded in a user area of the optical disk.
Then, by recording the mode information in the user area of the optical disc in the same way as normal information, it is possible to correspond to the function in an apparatus that supports overwriting, and no operation is performed in an apparatus that does not support the function. Without waking up, without changing the standard,
Incorporate unique functions.

Further, when mode information indicating that the optical disc is an optical disc dedicated to overwrite recording of the information is recorded on the optical disc, the additional information is recorded on the optical disc at the end. It is characterized by starting from the position where the recording is performed.

And it can always record one title (about 2 hours at 2.0Mbps).
Further, when the information is overwritten and recorded on the optical disc, and when a series of information is recorded, the recording starts again from the recording start point through the outermost circumference of the optical disc and the innermost circumference of the optical disc. The overwriting recording is stopped at a point.

When a series of information (for example, one program) is recorded on the overwrite recording dedicated disk, the program itself can be prevented from being overwritten.
In addition, when the information recorded on the optical disc is based on reserved recording,
The overwriting recording is not performed.

  According to the present invention, overwriting can be automatically performed on the same disc over and over again.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic block diagram of a recording / reproducing apparatus 100 including an embodiment according to the present invention. The recording / reproducing apparatus 100 of FIG. 1 has two types of disk drive units. First, it has a disk drive unit 12 that rotationally drives an optical disk 11 as a first medium that is an information recording medium capable of recording information including video information, and executes reading and writing of information. The control unit 7 reads and rewrites information recorded on the optical disc 11. The data recording / reproducing apparatus also includes a hard disk drive unit 13 that drives a hard disk 14a as a second medium. The data processor unit (D-PRO unit) 15 includes a disk drive unit 12
And the recording data can be supplied to the hard disk drive unit (HDD unit) 14, and
A regenerated signal can be received. The disk drive unit 12 includes a rotation control system, a laser drive system, an optical system, and the like for the optical disk 11. The data processor unit 15 handles data of recording or reproduction units, and includes a buffer circuit, a modulation / demodulation circuit, an error correction unit, and the like.

Further, the recording / reproducing apparatus 100 includes an encoder unit 16 constituting the recording side, a decoder unit 19 constituting the reproducing side, and a microcomputer block 20 for controlling the operation of the apparatus main body.
It is the main component.

The encoder unit 16 includes a video and audio analog-to-digital converter that digitizes an input analog video signal and analog audio signal, a video encoder, and an audio encoder. Furthermore, a sub-picture encoder is also included.
The output of the encoder unit 16 is output from a predetermined DVD-ROM by a formatter 17 including a buffer memory.
The data is converted into a RAM format and supplied to the data processor unit 15. The encoder unit 16 receives an external analog video signal and an external analog audio signal obtained from an A / V (Audio Video) input unit 23, or an analog video signal and an analog audio signal obtained from a TV (Television) tuner unit 22. Is done. The encoder unit 16
When the compressed digital video signal and digital audio signal are directly input, the compressed digital video signal and digital audio signal can be directly supplied to the formatter 17. In the video encoder included in the encoder unit 16,
Digital video signal is MPEG (Moving Picture Experts Group) 2 or MPEG1
It is converted into a digital video signal compressed at a variable bit rate based on the standard. Digital audio signals are based on MPEG or AC (Audio Compression) -3 standards,
Digital audio signal compressed at a constant bit rate or linear PCM (Pulse
Code Modulation) digital audio signal. When a sub video signal is input from the A / V input unit 23 (for example, a signal from a DVD video player with an independent output terminal of a sub video signal), or a DVD video signal having such a data structure is broadcasted. Is TV
When received by the tuner unit 22, the sub-picture signal in the DVD video signal is encoded (run-length encoded) by the sub-picture encoder to become a sub-picture bitmap.

The encoded digital video signal, digital audio signal, and sub-picture data are packed by the formatter 17 to become a video pack, an audio pack, and a sub-picture pack, and these are assembled to form a DVD-recording standard (for example, DVD -RAM
, DVD-R (Recordable), DVD-RW (Rewritable), etc. standard).

Here, the recording / reproducing apparatus 100 in FIG. 1 uses information formatted by the formatter 17 (
Video, audio, sub-picture data, etc.) and the created management information can be supplied to the hard disk drive unit 14 or the disk drive unit 12 via the data processor unit 15 and recorded on the hard disk 14a or the optical disk 11. . Information recorded on the hard disk 14a or the optical disk 11 can also be recorded on the optical disk 11 or the hard disk 14a via the data processor unit 15 and the disk drive unit 12. It is also possible to perform an editing process such as deleting a part of video objects of a plurality of programs recorded on the hard disk 14a or the optical disk 11 or connecting objects of different programs. This is because the format described in this embodiment defines a data unit to be handled and facilitates editing.

The microcomputer block 20 includes an MPU (Micro Processing Unit) (not shown).
Alternatively, a CPU (Central Processing Unit), a ROM (Read Only Memory) (not shown) in which a control program or the like is written, and a RAM (not shown) for providing a work area necessary for program execution are included.

The MPU of the microcomputer block 20 uses a RAM as a work area according to a control program stored in the ROM, detects a defect location, detects an unrecorded area, sets a recording information recording position, records a UDF (Universal Disk Format), Performs AV address setting and the like. The microcomputer block 20 includes an information processing unit necessary for controlling the entire system, and includes a work RAM, a directory detection unit, a VMG (total video management information) information creation unit, a copy related information detection unit, A copy and scrambling information processing unit (RDI processing unit), a packet header processing unit, a sequence header processing unit, an aspect ratio information processing unit, and the like are provided.

Connected to the microcomputer block 20 is a key input unit 21 for supplying an operation signal for operating the recording / reproducing apparatus 100.
The timing at which the microcomputer block 20 controls the disk drive unit 12, the hard disk drive unit 14, the data processor unit 15, the encoder unit 16, the decoder unit 19 and the like is based on time data from an STC (System Time Clock) 18. Can be specified. The recording and reproduction operations are normally executed in synchronization with the time clock from the STC 18, but other processes may be executed at a timing independent of the time clock from the STC 18.

The decoder unit 19 is a separator that separates and extracts each pack from a DVD format signal having a pack structure, a memory that is used when performing pack separation and other signal processing,
A V decoder that decodes the main video data (contents of the video pack) separated by the separator, and an SP (decoding the sub video data (contents of the sub-video pack) separated by the separator)
A sub picture decoder and an A (audio) decoder that decodes audio data (audio pack contents) separated by the separator. In addition, a video processor is provided that appropriately synthesizes the decoded sub-picture with the decoded main picture, and outputs the menu, highlight button, subtitle, and other sub-pictures superimposed on the main picture.

The output video signal of the decoder unit 19 is input to the V mixing unit 24. In the V mixing unit 24, text data is synthesized. The V mixing unit 24 includes a TV.
A line that directly takes in a signal from the tuner unit 22 or the A / V input unit 23 is also connected.

A frame memory used as a buffer is connected to the V mixing unit 24. V
When the output of the mixing unit 24 is an analog output, it is output to the outside via an I / F (Interface) 26, and when it is a digital output, it is output to an external monitor display 27 via a digital / analog converter 25. .

The output audio signal of the decoder unit 19 is converted into an analog signal by a digital / analog converter 29 via a selector 28 and output to an external speaker 30. The selector 28 is controlled by a select signal from the microcomputer block 20. As a result, selector 2
8 can directly select a signal that has passed through the encoder unit 16 when directly monitoring a digital signal from the TV tuner unit 22 or the A / V input unit 23.

FIG. 2 shows a re-recordable optical disk 11 used in the disk drive unit 12 shown in FIG.
The structure of is shown. The recording management unit 34 stores management information on which position on the optical disc 11 the data recorded in the user area 32 is recorded. By getting this information,
Playback from the beginning of the recorded data is possible. The user area 32 stores files (information including video information) actually recorded on the optical disc 11.

In addition, an overwrite recording dedicated mode identifying unit 321 is provided in a part of the user area 32. The overwrite recording only mode identifying unit 321 is an area in which mode information indicating whether or not the optical disk 11 is in the overwrite recording only mode is recorded. Note that the start address of the overwrite recording-only mode identifying unit 321 is not recorded in the recording management unit 34 so that it is not accessed by devices other than the recording / reproducing device 100. For this reason, it cannot be accessed by a disk drive of another device. However, the disk drive unit 12 of the recording / reproducing apparatus 100 in FIG. 1 is configured to first reproduce the address next to the final address of the recording management unit 34 of the optical disk 11 when the optical disk 11 is inserted. Thereby, the disk drive unit 12 checks the overwrite recording dedicated mode identifying unit 321 starting from the address next to the final address of the recording management unit 34, and checks whether or not the optical disk 11 is an optical disk in the overwrite dedicated recording mode.

FIG. 3 is a flowchart in which the disk drive unit 12 of the recording / reproducing apparatus 100 checks whether or not the inserted optical disk 11 is set to the overwrite recording only mode.

The disk drive unit 12 checks whether or not the optical disk 11 has been inserted into the disk drive unit 12 (step 301). When the disk drive unit 12 detects that the optical disk 11 has been inserted, a pickup (not shown) is connected to a predetermined address of the optical disk 11. (Step 302), and checks the overwrite recording only mode identifying unit 321 in a part of the user area unit 32 of the optical disc 11 (step 303). In the case of FIG. 2, the predetermined address is an address next to the final address of the recording management unit 34 and corresponds to the first address of the user area unit 32. Note that the overwrite recording-only mode identifying unit 321 may be arranged in any of the user area units 32 as long as an address is designated in advance in the disk drive unit 12. The disk drive unit 12 is an optical disk 11
As a result of checking the overwrite recording only mode identifying unit 32, if it is determined that the optical disc 11 is set to the overwrite recording only mode (Yes in step 304), the optical disc 11 is set to “
Treated as an "overwrite-only mode" optical disc. The operation of the disk drive unit 32 in the overwrite recording only mode will be described with reference to FIG. If No in step 304, that is, if no information is recorded in the overwrite-only recording mode identifying unit 32 (for example, all 0
Or, all 1 is recorded), and the optical disk 11 is not in the “overwrite recording only mode” and performs normal processing (normal recording).

In the present embodiment, by setting to the “overwrite recording only mode”, until the recording is completed, the innermost circumference (the beginning of the user area 33) to the outermost circumference (the end point of the user area 32), and then the outermost recording. It moves to the inner circumference (the beginning of the user area 32) and repeatedly records up to the outermost circumference (the end point of the user area 32).

Even if recording is continued from the outermost circumference to the innermost circumference, it can be reproduced seamlessly. This is because a buffer memory (not shown) is provided in the recording / reproducing apparatus 100, and when information is reproduced from the optical disc 11, the information is continuously reproduced from the buffer memory while moving from the outermost periphery to the innermost periphery of the optical disc 11. realizable.

FIG. 4 is a flowchart for explaining the “overwrite recording only mode”, which is a feature of the present embodiment.
First, when the recording / reproducing apparatus 100 uses the optical disc 11 as a recording medium as the “overwrite recording only mode”, it is necessary to initialize the optical disc 11 and set the “overwrite recording only mode”. This mode cannot be set for DVD-R (Recordable) that cannot be re-recorded. Therefore, in the “overwrite recording only mode” setting, it is first checked whether or not the optical disk 11 is a re-recordable disk (DVD-RW (Re-recordable), DVD-RAM (Rewritable) disk).
(Step 401). This may be done by checking a flag indicating which DVD standard is referred to as a book type of the optical disc 11 or may be judged from physical characteristics of the optical disc 11. At this time, by displaying the GUI image shown in FIG. 6 on the monitor 27, it is possible to prompt the key input unit 21 by the user.

In step 402, when the user sets the “overwrite recording only mode”, the optical disc 11 reads “
“Overwrite recording only mode” is entered, and the subsequent operations are performed. For the user, the screen shown in FIG. 7 is shown, and the user selects the recording mode by inputting “overwrite mode” from the key input unit 21. Then, as shown in FIG. 8, the completion of initialization in the overwrite mode is displayed on the screen, and when the optical disc 11 is set to the “overwrite recording only mode” in step 402, the disc drive unit 12 is accordingly followed. Performs the following processing.

The disk drive unit 12 moves a pickup (not shown) to the innermost circumference of the optical disk 11.
(Step 403), information recording is started (Step 404). Information recording positions are recorded (saved) in the recording management unit 34 of the optical disk 11 at predetermined time intervals or at predetermined information amounts (step 405).
). Check whether the laser irradiation position by the pickup (corresponding to the recording position) has reached the outermost periphery of the optical disc 11 (end point of the user area part 32) (whether the information has been recorded to the outermost periphery) (step 406), when the outermost circumference is reached, the pickup is moved to the innermost circumference of the optical disc 11 (end point of the overwrite recording dedicated mode identifying unit 321 of the user area unit 32) for overwriting recording (step 407), Recording continues (step 408). Then, it is checked whether or not the recording of information is completed (step 409) .If the recording is completed, the final recording position of the information on the optical disk 11 is stored in the recording management unit 34 (step 410), and the process is performed. finish.

In the “overwrite only mode”, the optical disk 11 is, for example, a two-hour disk (4.6M
When one title exceeding the maximum recording time (in bps) is recorded continuously, the recording is stopped without overwriting once it reaches the recording start position. This is to prevent the recorded title from being erased if recording is continued without stopping.

FIG. 5 is a flowchart for explaining processing change in accordance with the type of information to be overwritten in the “overwrite recording only mode”. Here, the information to be overwritten is 1. information recorded by the user in reserved recording, or 2. information recorded by the operation from the key input unit 21 from the user (for example, the user is watching the monitor 27) (Sometimes, a sudden recording was made by a visitor)
Hereinafter, it is assumed that the processing in the “overwrite recording only mode” is changed by direct recording). This is because the information in 2. is mainly intended for time shifting.
This is because there is a high possibility that the information may be overwritten as compared with the above information.

Information recording is started when the user instructs information recording on the optical disk 11 that is already set to the “overwrite recording only mode” in FIG. 4 (step 501). On the other hand, the disk drive unit 12 checks the optical disk 11 and checks what information is recorded in the user area unit 32. Specifically, it is checked whether the information is reserved recording information or directly recorded information. Note that which information can be realized by, for example, recording an identifier in the overwrite recording only mode identifying unit 321. Check whether the information recorded on the optical disc 11 is direct recording (reserved recording) (step 502), and Yes (
In the case of (direct recording), the alert shown in FIG.
Confirm that the recorded information is overwritten and recorded. It is checked whether or not the user has instructed to start recording via the key input unit 21 (step 504).
And “Yes” is selected), information is overwritten from the last recording last position in the user area section 32 (step 505). In step 506, it is checked whether or not overwriting has reached the end point of the user area section 32. If Yes, overwriting is stopped (step S507). Step 5
If 02 is No (reserved recording), recording is performed in the autumn area of the user area unit 32 without overwriting. The user is informed that recording is not possible if there is no free space, and recording is not performed.

In the disc set in the “overwrite only mode”, the next recording position is set to the immediately preceding recording end position even if the user arbitrarily deletes the recording data for the purpose of repeated recording. In addition, when a plurality of titles are recorded on the disc in the “overwrite only mode”, playback is performed from the beginning of the last recorded title. This is the same as the specification of a known recording / reproducing apparatus (DVD recorder).

Then, when initializing a re-recordable DVD-RW / RAM disc, “Overwrite recording only mode”
By setting to, the user can record programs repeatedly without worrying about the capacity of the disc. Therefore, the “overwrite-only mode” disc does not require a recording area, so not only can anyone easily record and play back, but it can also be recorded and played back and erased after playback. Can also be used for recording and storing necessary data. In addition, it can be used like an analog video tape, and the image quality does not deteriorate.

Note that when the recording / reproducing apparatus 100 performs reserved recording, if the recording destination is set to the optical disc 11 in the “overwrite recording only mode”, the optical disc 11 is in the “overwrite recording only mode” as shown in FIG. Is displayed.

1 is a schematic configuration diagram of a recording / reproducing apparatus according to an embodiment of the present invention. The block diagram of the re-recordable optical disk used for the recording / reproducing apparatus concerning the embodiment. 6 is a flowchart for checking whether or not the optical disc according to the embodiment is set to an overwrite recording mode. 7 is a flowchart for explaining an “overwrite recording only mode”. 9 is a flowchart for explaining processing change in accordance with the type of information to be overwritten in the “overwrite recording only mode”. The screen image figure which prompts initialization of an optical disk. The screen image figure which sets an optical disk to "overwrite recording only mode". The screen image figure which notifies a user that an optical disk was set to "overwrite recording only mode". The screen image figure of the alert which confirms whether the overwrite recording to the recorded information is possible with respect to a user. The screen image figure which shows to a user that the optical disk of a recording destination is set to the "overwrite recording only mode" at the time of reservation recording.

Explanation of symbols

11 Optical disc
12 Disk drive section
20 Microcomputer block
21 Key input section
27 Monitor
32 User area
100 Recording / playback device
321 Overwrite recording mode identification part

Claims (6)

A recording / reproducing apparatus for recording and reproducing information on a re-recordable optical disc,
Mode information recording means for recording mode information indicating that the optical disc is an optical disc dedicated to overwrite recording of the information on the optical disc;
When the mode information is recorded on the optical disc, the information is recorded to the recording capacity of the information on the optical disc, and when the information is further recorded on the optical disc, the information is recorded on the optical disc. A recording / reproducing apparatus comprising: control means for controlling overwriting. Recording of the information is performed from the innermost circumference to the outermost circumference of the optical disc,
2. The recording / reproducing apparatus according to claim 1, wherein the overwriting is performed from the innermost circumference of the optical disc after the information is recorded to the outermost circumference of the optical disc. 3. The recording / reproducing apparatus according to claim 1, wherein mode information indicating that the optical disk is an optical disk dedicated for overwriting recording of the information is recorded in a user area of the optical disk. When mode information indicating that the optical disk is an optical disk dedicated to overwrite recording of the information is recorded on the optical disk, additional recording of the information is performed when the information is recorded last on the optical disk. Starting from the position where the operation is performed.
The recording / reproducing apparatus as described in any one of thru | or 3. When the information is overwritten and recorded on the optical disc, and when a series of information is recorded, the recording starts from the outermost circumference of the optical disc, the innermost circumference of the optical disc, and again at the recording start point. The recording / reproducing apparatus according to claim 1, wherein the overwriting recording is stopped. 6. The recording / reproducing apparatus according to claim 1, wherein overwriting is not performed when the information recorded on the optical disc is based on reserved recording.

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