JPH10334561A - Video recording disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start recording immediately after inputting a recording starting command. SOLUTION: This device is equipped with a recording and reproducing part 5 for recording and reproducing a video data of a moving picture on a disk 4, a control part 14 for moving this recording and reproducing part 5 into a prescribed position on the disk and also for outputting the video data of the moving picture to the recording and reproducing part 5 and an operating part 16 for inputting the recording starting command and a recording ending command. Then, the control part 14 is equipped with a previous recording starting control means 30 for starting recording the video data prior to the input of the recording starting command from the operating part 16, a recording control means 31 for recording the video data in an area where rerecording is permitted in the disk 4 after starting recording by this previous recording starting control means 30, a recording inhibit setting means 32 for setting inhibition of rerecording of the video data to be recorded on the disk 4 at the time of inputting the recording starting command from the operating part 16 and a recording permission setting means 33 for setting permission of rerecording of the video data to be recorded on the disk at the time of inputting the recording ending command from the operating part 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a video recording disk device, and more particularly, to a video recording disk device for recording moving images.

[0002]

2. Description of the Related Art Conventionally, video tapes have been generally used for recording moving images. In this video recording apparatus using a video tape, when recording-stopping-recording-stopping is repeated, the first recording is performed in order to match the pattern on the tape at the joint between the previously recorded portion and the newly recorded portion. At the time of completion, short rewind called short back is performed, and when starting a new recording, the previously rewinded part is reproduced and synchronized with the new video data, and then switched to the recording state. .

[0003] Also, in recording video using a disc,
Start rotating the disk in standby mode and wait,
After receiving the recording start command, the recording / reproducing unit is moved to the last address of the empty area to start recording.
FIG. 8 is a flowchart showing details of this operation.

First, when it is detected that a disk is inserted (F01), disk management data is read from the disk (F02), and disk management data R in the apparatus is read.
Write to AM part. Thereafter, until the disk is removed from the apparatus, the operation proceeds by accessing the disk management data RAM.

When it is detected that the user has entered the standby mode after the insertion of the disc (F03), the apparatus is brought into a state in which recording on the disc is possible. In other words, when the user presses the standby button on the operation unit to enter the stan high mode,
The spindle motor is rotated roughly (F04) so that when a recording start command is input, the rotation waiting time of the disk is shortened.

Further, the last address at the time of the previous recording is read from the disc management data, and the pickup unit is moved to the vicinity of the last address to be in a standby state (F5). Next, it is detected that the user has pressed the recording start button (F06), a search for the last address is started (F07), and when the last address is detected (F0).
8) The recording operation on the disc is started (F09).

Further, it is detected that the user has pressed the recording end button during recording (F10), and a recording stop operation is performed (F11). Then, the last address at which the recording has been performed is stored in the disk management data RAM (F12), and the process returns to step F06 again to wait in a standby state until a recording start command is input from the user.

During this standby, it is monitored whether or not the standby button, which receives a standby-off command from the user, is pressed (F17). If the standby button is pressed, the spindle motor is stopped (F16). It returns to step F03 and waits until the standby state is instructed again. During this standby, monitoring that the disk eject button is pressed in F13 is monitored, and when it is detected that the user has pressed the disk eject button, the data of the disk management data RAM in the apparatus is transferred to the disk management data area of the disk. (F14), and the data is stored on the disk until the next disk insertion. Further, the disc is ejected (F15), and the process returns to F01 to monitor whether the disc is inserted again.

[0009]

However, according to the prior art, the recording cannot be started immediately because the user presses the recording button to search for an empty portion on the disk or adjust the rotation of the disk. However, it takes a long time from when the user presses the recording start button to when the recording is actually started on the disc, and if this is the case, there is an inconvenience that the head of the video is missing. Although this problem can be solved by temporarily storing print data in a data buffer, a large-capacity print buffer is required, which increases cost and is inefficient. And even in the conventional example of recording a moving image using a video tape, in order to synchronize with new video data by playing back a previously rewound part when starting a new recording,
It takes a long time from when the user presses the recording start button to when the recording is actually started on the disk, and there is an inconvenience that the head of the video is lost.

Further, in the conventional example, when the user shoots something, there is a disadvantage that the event cannot be recorded even if the recording start button is pressed after confirming the event. For this reason, the user always predicts an event, and since recording is started in advance, there is a large ratio of recording an unnecessary portion, and there is a disadvantage that the use efficiency of the disc is deteriorated.

It is an object of the present invention to improve the inconvenience of the prior art and, in particular, to provide a video recording disk device capable of starting recording immediately after a recording start command is input.

[0012]

Therefore, according to the present invention, there is provided a disk for recording a moving image, a recording and reproducing unit for recording and reproducing moving image video data on and from the disk, and a recording and reproducing unit on the disk. And a control unit for outputting video data of a moving image to the recording / reproducing unit and an operation unit for inputting a recording start command and a recording end command. In addition, the control unit includes a pre-recording start control unit that starts recording of the video data before a recording start command is input from the operation unit, and a recording unit that starts recording by the pre-recording start control unit. Recording control means for recording the video data in an area for which re-recording is permitted, and re-recording of the video data to be recorded on the disc is prohibited when a recording start command is input from the operation unit. Recording non-permission setting means, and recording permission setting means for setting re-recording of video data to be recorded on the disc to be permitted when a recording end command is input from the operation unit. . This aims to achieve the above-mentioned object.

When the power is turned on or the apparatus enters the standby mode, the pre-recording start control means starts recording the video data before a recording start command is input from the operation unit. Then, the recording control means causes the input video data to be recorded in an area of the disc for which re-recording is permitted. When a recording start command is input from the operation unit during the pre-recording, the recording non-permission setting unit sets the re-recording of the video data currently recorded on the disc to non-permission. For this reason, no re-recording is performed even if recording is attempted in this area next time. Then, when a recording end command is input from the operation unit while the video data is being re-recorded, the recording permission setting unit sets the re-recording of the video data to be recorded on the disc to be permitted. At this time, since the recording of the data has already been performed and the recording is started by changing the management information, there is no time lag due to the control of the hardware and the like required until the recording of the video data is started. After that, recording by the recording control means continues, and at this time, the recording control means records data only in the area where re-recording is permitted. Therefore, data recorded between the time when the recording start command is input and the time when the recording end command is input is not overwritten. When the disk reaches the outermost circumference, the recording is performed from the innermost area of the recordable free areas. By repeating this, video data is recorded until there is no more recordable area on the disc.

As described above, the video recording disk device of the present invention always performs recording on the disk when the occurrence of the event for the recording is predicted, and the operation of starting and ending the recording is prohibited from overwriting the disk management data. The processing is performed by setting the slope, and the time delay from when the recording start button is pressed to when the recording is started is solved.

[0015]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention. The video recording disk device according to the present embodiment includes a disk 4 for recording a moving image, a recording and reproducing unit 5 for recording and reproducing moving image data on the disk 4, and a recording and reproducing unit 5
To a predetermined position on the disk and to output video data of a moving image to the recording / reproducing unit 5.
And an operation unit 16 to which a recording start command and a recording end command are input. The disk 4 has a video data storage area 4A and a management data storage area 4B.

Further, as shown in FIG. 2, the control section 14 includes a pre-recording start control means 30 for starting recording of the video data before a recording start command is input from the operation section 16, and A recording control unit 31 for recording the video data in an area of the disc 4 where re-recording is permitted after the recording is started by the start control unit 30; Recording non-permission setting means 32 for setting re-recording of video data to be recorded on the disk 4 to be non-permitted, and re-recording of video data to be recorded on the disk when a recording end command is input from the operation unit 16. Recording permission setting means for setting the permission.

Recording is performed in advance by the pre-recording start control means 30, and the recording non-permission setting means 32 operates when a recording start command is input from the operation unit, for example, when a recording start button is pressed down. Since the attribute of the recorded data is set to the recording non-permission, the video currently being captured can be recorded when the recording start command is input, so from the recording start command to the actual start of recording. No waiting time. Further, since the recording control means repeatedly overwrites the area for which recording is permitted, there is no inconvenience caused by performing pre-recording.

In one embodiment, the control unit updates the disc management information when the recording non-permission setting unit or the recording permission setting unit sets permission or non-permission of re-recording of the video data. A disk management information control unit 34 is provided. Thereby, recording permission or non-permission can be clearly managed for all addresses of each disk. In this example, the recording control unit refers to the disc management information when performing recording.

The disk management information control means 34
A disk management information memory for storing disk management information for managing permission or non-permission of re-recording for each area specified by each address of the disk 4;
A management information reading function for reading disc management information recorded on the disc when the disc is mounted, and a management function for writing disc management information stored in the disc management information storage unit to the disc when ejecting the disc. An information writing function may be provided. As a result, even if the disk is replaced, the disk management information is not lost.

In this example, the control unit 14 refers to the disc management information read by the disc management information control means 34 when the disc 4 is inserted, and sets a plurality of re-recording permission for the disc. It is preferable to include a recording position selection control means 35 for starting recording from the smallest address in the area and thereafter sequentially increasing the address while selecting an address for which re-recording is permitted by the disc management information as a recording position. in this case,
Recording is sequentially performed from the inner peripheral side to the outer peripheral side of the disk 4 in the recording permission area.

Further, the recording position selection control means may be arranged such that, when the address at which the video data is to be recorded becomes the last address of the disc, there is an area for which re-recording is permitted by referring to the disc management information. May be provided with a head empty area selection function for selecting the head address of the area of the earliest address among the areas for which re-recording is permitted as a recording position. In this case, after recording is performed from the inner peripheral side to the outer peripheral side, recording is performed again from the inner peripheral side.

In this example, the recording position selection control means refers to the disc management information when the address at which the video data is to be recorded becomes the last address of the disc, and sets the area in which re-recording is permitted. When there is no disk full, a disk full display control function for outputting a disk full message to the operation unit is provided. Thereby, it is possible to satisfactorily confirm whether or not the entire area of the disk has been used.

FIG. 3 is a block diagram showing the configuration of hardware resources according to the present embodiment. Reference numeral 1 denotes a mechanical part for reading and writing data from / to a disk.
Includes a spindle motor 2 for rotating a disk, a disk chucking unit 3 for fixing the disk to the spindle motor shaft, a data pickup unit (recording / reproducing unit) 5 for reading data on the disk using light or the like, 4 is provided.

The control unit shown in FIG. 1 includes a system control unit 14, a disk rotation control unit 7 for keeping the disk at a predetermined rotation speed for reading data from the disk, and a pickup unit for moving the pickup unit to a target position. A track position control unit 8, a recording amplifier unit 10 for amplifying data output to the data pickup unit 5, a high frequency amplifier unit 6 for amplifying data output from the data pickup unit 5, and a signal amplified by the high frequency amplifier unit 6. And a data decoding unit 7 for decoding the decoded data.

Further, the system control unit 14
Disk management data RA for storing the disk management data stored in the management data storage area 4B of the disk 4.
M12 is also provided. Data input from the video circuit is encoded by the data encoding unit 12 and temporarily stored in the data buffer 11. The data buffer 11 has a capacity necessary to secure a time for moving the data pickup unit 5 when recording in a discontinuous area.

The system control unit 14 includes the operation unit 6
And functions as each unit shown in FIG. 2 in accordance with a command from the operation unit 16. The operation unit 6 includes a disc eject button 17 for outputting a disc eject command, a standby button 18 for setting and canceling a standby mode, and a recording start button 1 for outputting a recording start command.
9 and a recording end button 20 for outputting a recording end command. The recording time backward button 21 is used in an embodiment described later.

When video data is input, first, the data encoding unit 12 performs data conversion for recording on the disk 4. Even if some data on the disk is changed for some reason, redundant data or the like is added so that the original data can be restored. Further, this data is temporarily stored in the data buffer 11 and read out in synchronization with the rotation of the disk. The signal read from the buffer 11 is amplified by the recording amplifier unit 10 and recorded on the disk 4 from the pickup unit 5.

Conversely, at the time of reading, the signal read from the disk 4 by the data pickup unit 5 is amplified by the high-frequency amplifier unit 6, and then subjected to error correction by the data decoding unit 7 to be returned to the data at the time of recording. The system control unit 14 is a key control unit (operation unit) 1
A control command is issued to each unit in accordance with the command (command) received from 6, and the whole is controlled in accordance with information fed back from each unit. Display (A1
5) displays various information to feed back the status of the device to the user.

The disk management data RAM 13 reads disk management data from the disk management data storage area 4B on the disk 4 when the disk 4 is inserted, and temporarily stores the data. When writing data to a disk, the system control unit 14 controls the disk management data RAM
13 to read the recording state of the disk, write data to an empty area of the disk, and write that the area has been recorded to the disk management data RAM 13; Make sure that it is not overwritten. In addition, disk 4
When data is read from the disk, the position where the target data is written is read from the disk management data RAM 13, and the pickup 5 is moved to that position so that the target data can be read.

The data written in the disk management data RAM 13 is returned to the disk management data area on the disk when the disk is taken out of the apparatus. By this operation, the recording state of the disc is always preserved.

FIG. 4 is a flowchart showing an operation example according to the present embodiment. First, it is detected whether or not a disc has been inserted (S1). When the disk is inserted, the disk management data on the disk is read (S2) and recorded in the disk management data RAM 13 in the apparatus. further,
When the standby mode is set, the pickup 5 is positioned at the minimum address of the empty area. Further, as shown in FIG. 4, when the disk management data is read out to the RAM, the pickup may be positioned at the minimum address of the empty area (S3).

When the standby mode is set (S
4) The pickup is moved from the disk management data RAM to the smallest overwritable address on the disk to record data on the disk (S5). This record is a preliminary record. During this recording, the recording flag is checked (S6). If it is determined that a recording start command has been input by checking this flag, the attribute of the data being recorded is set to be non-rewritable (S7). That is, the disk management data is updated.

On the other hand, if a recording end command is input after the recording is once started, the attribute of the recorded data is set to be re-writable. Also, in the case of the same last time, for example, when the state where the recording start button 19 is not pressed down is continued, the disc management data is not updated.

Then, it is confirmed whether the current address for data recording is the largest address on the disk (S9). If it is not the last address, the address is incremented by one (S10), and it is checked whether re-recording is possible or not by referring to the disc management information (S11). If recording is possible, after confirming that it is in standby mode,
The data is recorded (S5). On the other hand, if recording is not possible, the address of the next empty area is searched by referring to the disc management information, and the pickup 5 is moved to the next empty area (S
12). If there is no empty area, the process moves to the last address of the disk.

In step S9, if the address to be recorded is the last address of the disk, the presence or absence of an empty area is checked by referring to the disk management data (S9).
13). If there is an empty area, it moves to the first empty area. If it has moved to an empty area (S12, S14), it is checked whether or not it is in the standby mode, and data is recorded (S5).

If it is determined in step S13 that there is no empty area, a disk full state is displayed as shown in FIG. 4 (S15). In this case, it is checked whether or not there is a disk removal command. If the disk is to be removed, the disk management data on the RAM 13 is recorded in the management data area 4B of the disk 4 (S17), and the disk is ejected (S18). Even when the standby mode is released in step S4, the disk management data is updated to the disk 4.

FIG. 6 is an explanatory diagram showing a recording state on a disk of this system. First, when a fresh disk is loaded, video data recording starts immediately from point A as shown in FIG. When the recording start button is pressed at point B in this state, the address is stored in the disc management data RAM 13 as re-recording is not permitted. Continue recording as it is C
When the recording end button is pressed at that point, the address is stored in the disk management data RAM 13 as overwriting is prohibited.

Further, the recording is continued, and the disc management data RAM stores the data as overwritable until the recording start button 19 is pressed again at the point D. Then, from point D, recording is performed again while prohibiting overwriting in the disc management data RAM.
Until the recording end button is pressed again at the point E, the data is stored as overwrite inhibition. In this manner, the data to be written on the disk management data RAM is saved as overwrite-enabled and overwrite-protected each time the recording start button and the recording end button are pressed, while the recording is always continued. When the recording reaches the outermost periphery (point E) of the data area by repeating this, the disk is moved again to the innermost position where recording is possible (no overwriting is prohibited) and recording is continued.

At this time, the recording of the overwriting-prohibited state is started at the point F in FIG. 6, and when the point G is reached, the recording head is moved to the recordable inner point H again to continue the recording. In the first recording, when point I, which is the overwrite-protected address (point B), is reached, B
The recording is skipped to the point J at the overwritable address (point C) corresponding to the point, and the recording is further continued. When the recording end button is pressed at the point K, the overwriting is possible from the point K and the recording is continued.

The above operation is repeated, and further, from the point L to the point U, and when the overwritable slope is not present on the disk (point U), the recording on the disk is completed as the disk full. At the time of reproduction, reproduction is performed in the order of continuous recording by reproducing according to the disc management data.

As described above, the control processing inside the apparatus by operating the recording start button and the recording end button is K1.
In step 4, since only rewriting is prohibited and written to each address of the disk management data RAM in accordance with the recording state, there is no delay time from when the recording start button is pressed to when recording is started, and recording of the target event is smoothly performed. It can be carried out.

Next, another embodiment will be described. In this embodiment, the recording non-permission setting unit is configured to set the recording non-permission from the position on the disc that is not permitted when the start time backward command is input from the operation unit to a position recorded before a predetermined time. The function of setting the re-recording of the video data to non-permission is provided. Therefore, the recording start time can be moved to a time before the time when the recording start button is pressed.

For example, FIG. 7 is an enlarged view of portions A, B, C, and D in FIG. 6, in a case where the recording time back button 21 is pressed once so that the overwriting prohibited address is set back by 10 seconds. As shown in FIG. 7, when the recording start button is pressed for the first time, the overwriting prohibition state is started from the point B1, followed by pressing the start time backward button 10 seconds backward, and further pressing the start time backward button 10 seconds backward. , B2 are overwrite prohibition start addresses. In this manner, the recording storage area is recorded 20 seconds retroactively. Therefore, it is possible to efficiently perform the recording operation by changing the backward time according to the use environment.

As described above, according to the present embodiment, the recording is always performed on the disk even when the apparatus is in the standby mode, and when the recording start button and the recording end button are operated, the disk management data in the apparatus is overwritten with the overwriting prohibited state. Since the recording state has only been changed, the transition to the recording state can be performed in a very short time after the recording start button is pressed, and therefore, the recording is actually performed on the disc after the recording start button is pressed. Is very short, and it is possible to effectively prevent occurrence of a situation that fails to record a target event.

When the user takes an image of something, the recording start point can be moved to a time before the event occurs by pressing the recording start time backward button even if the user has already confirmed the event and pressed the recording start button.

Usually, it is necessary to anticipate the time at which the target event will occur, and to record the event in advance in order to start recording on the disk in advance, so that it is necessary to perform recording with a sufficient margin. However, according to the present invention, it is possible to designate recording and storage until a time immediately before the occurrence of the event after the occurrence of the event, so that there is no need to perform useless recording, thereby increasing the use efficiency of the disk. be able to.

[0047]

According to the present invention, the pre-recording start control means starts the recording of the video data before a recording start command is input from the operation unit. During this pre-recording,
When a recording start command is input from the operation unit, the recording non-permission setting unit sets re-recording of video data currently recorded on the disc to non-permission, so that recording can be started by a change in management information, Accordingly, there is no time lag due to control of hardware and the like required until recording of the video data is started, and therefore, an excellent video recording disk device which can record an object accurately without being missed is provided. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a control unit shown in FIG.

FIG. 3 is a block diagram illustrating a configuration of hardware resources according to the embodiment illustrated in FIG. 1;

FIG. 4 is a flowchart illustrating an example of control in the configuration shown in FIG. 3;

FIG. 5 is a flowchart illustrating a control example following the operation illustrated in FIG. 4;

FIG. 6 is an explanatory diagram showing an example of recording of video data according to the flowcharts shown in FIGS. 4 and 5;

FIG. 7 is an explanatory diagram showing an example of recording video data according to another embodiment.

FIG. 8 is a flowchart schematically showing the operation of a conventional video recording disk device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disk mechanism part 2 Spindle motor 3 Disk chucking part 4 Disk 5 Recording / reproduction part (pickup part) 6 High frequency amplifier part 7 Data decoding part 8 Track position control part 9 Disk rotation control part 10 Recording amplifier part 11 Data buffer 12 Data encoding Unit 13 disk management data RAM 14 control unit (system control unit) 15 display unit 16 operation unit (key control unit) 17 disk eject button 18 standby button 19 recording start button 20 recording end button 21 start time backward button

Claims (8)

[Claims] 1. A disk for recording a moving image, a recording and reproducing unit for recording and reproducing moving image video data on and from the disk, and moving the recording and reproducing unit to a predetermined position on the disk and recording and reproducing the data. A video recording disk device comprising: a control unit that outputs video data of a moving image to a unit; and an operation unit to which a recording start command and a recording end command are input. The control unit receives a recording start command from the operation unit. Pre-recording start control means for starting recording of the video data before the recording is started, and recording the video data in an area of the disc which is permitted to be re-recorded after the recording is started by the pre-recording start control means. Recording control means for setting the video data to be recorded on the disc to be non-rerecordable when a recording start command is input from the operation unit. Video recording, comprising: recording non-permission setting means; and recording permission setting means for setting re-recording of video data to be recorded on the disk to be permitted when a recording end command is input from the operation unit. Disk device. 2. The disk management information, wherein the control unit updates the disk management information when re-recording permission or non-permission of the video data is set by the recording non-permission setting unit or the recording permission setting unit. 2. The video recording disk device according to claim 1, further comprising control means. 3. A disk management information memory for storing disk management information for managing re-recording permission or non-permission for each area specified by each address of the disk, A management information reading function for reading disk management information recorded on the disk when the disk is mounted; and writing management information for writing disk management information stored in the disk management information storage unit to the disk when the disk is ejected. 3. The video recording disk device according to claim 2, further comprising a function. 4. The control unit refers to the disk management information read by the disk management information control unit when the disk is inserted, and selects the smallest address among a plurality of re-recording permitted areas of the disk. 4. A recording position selection control means for starting the recording from the beginning and thereafter sequentially increasing the address while selecting an address for which re-recording is permitted by the disc management information as a recording position. The video recording disk device according to the above. 5. An area for which re-recording is permitted by the recording position selection control means with reference to the disc management information when an address at which video data is to be recorded becomes the last address of the disc. 5. The video recording disk device according to claim 4, further comprising a head free area selecting function for selecting a head address of an area of the earliest address among the areas for which re-recording is permitted as a recording position. 6. The recording position selection control means refers to the disc management information when an address at which video data is to be recorded becomes the last address of the disc, and there is no area for which re-recording is permitted. 5. The video recording disk device according to claim 4, further comprising a disk full display control function of outputting a disk full message to the operation unit in such a case. 7. The operation unit further includes a standby mode setting command input means for receiving a standby mode setting command, and the control unit receives a standby mode setting command from the standby mode setting command input means. 2. The video recording disk device according to claim 1, further comprising a standby mode pre-recording control unit for starting pre-recording before inputting the recording start command. 8. The recording non-permission setting means, from a position on the disc which is not permitted when a start time backward command is input from the operation unit to a position recorded before a predetermined time. 2. The video recording disk device according to claim 1, further comprising a function of setting re-recording of the video data to be not permitted.