JP3666088B2 - Video signal recording apparatus and video signal reproducing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a video signal recording apparatus and a video signal reproduction apparatus suitable for application to, for example, a camera-integrated recording apparatus. For more information,RecordThe present invention relates to a video signal recording apparatus and a video signal reproducing apparatus that enable an important file to be easily stored by enabling a predetermined file on a recording medium to be set to prohibition of erasure.
[0002]
[Prior art]
Conventionally, there is a video signal recording / reproducing apparatus in which a video camera is integrally formed, and it has been considered to use, for example, a hard magnetic disk (hereinafter referred to as “HD”) as a recording medium.
[0003]
[Problems to be solved by the invention]
As described above, when an HD is used as a recording medium, a video signal is recorded on the HD by being divided into files, for example. Then, after the video signal is recorded in the entire recording area of the HD video signal, the video signal is overwritten and recorded on the file portion where the video signal is already recorded. In this case, if it is not known where the file portion to be overwritten is recorded, there is a possibility that an important file recorded on the HD will be erased.
[0004]
Therefore, the present invention provides a video signal recording apparatus and a video signal reproduction apparatus that can easily store important files recorded on a recording medium.
[0005]
[Means for Solving the Problems]
  The video signal recording apparatus according to the present invention is a video signal recording apparatus for recording a video signal divided into files on a recording medium, and a file storage means for setting a predetermined file recorded on the recording medium to be erasure prohibitedAnd the save keyWithWhen the save key is operated during recording, the file saving means sets a file recorded on the recording medium to be erasure prohibition from a time that is a predetermined time before the save key is operated again.Is.
[0006]
  On the recording medium, video signals are recorded by being divided into files. A predetermined file recorded on the recording medium by the file storage means is set to prohibit erasure. Here, when the save key is operated during recording, files that are recorded between the time that is traced back by a certain time and the time when the save key is operated again are set to erasure prohibition.Is done.
[0007]
  The video signal reproducing apparatus according to the present invention is a video signal reproducing apparatus for reproducing a video signal from a recording medium on which the video signal is divided into files and sets a predetermined file recorded on the recording medium to be erasure prohibited. File storage meansAnd the save keyWithWhen the save key is operated during playback, the file storage means sets a file that is played back from the recording medium from a time that is back by a certain time to a time when the save key is operated again, and prohibits erasure.Is.
[0008]
  On the recording medium, video signals are recorded by being divided into files. The predetermined file recorded on the recording medium by the file storage means is set to prohibit erasure. Here, when the save key is operated during playback, files that are played back from the time that has been traced back by a certain time until the time when the save key is operated again are prohibited.Is done.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a camera-integrated disk device 100 as an embodiment. The disk device 100 is separated by a lens block 101, a color separation prism 102 for separating light incident through the lens block 101 into red, green, and blue color component light, and the color separation prism 102. CCD (charge coupled device) solid-state imaging devices 103R, 103G, and 103B on which red, green, and blue color component lights are incident to form red, green, and blue images of the subject on the imaging surface, respectively; A CCD driver 104 for driving the image sensors 103R, 103G, and 103B.
[0012]
The disk device 100 also includes a timing generator 105 for supplying necessary timing signals to the CCD driver 104, a microcomputer, a system control unit 106 for controlling the operation of the entire system, a user's A key operation unit 107 connected to the system control unit 106 for operation and a display unit 108 connected to the system control unit 106 for displaying an operation state of the user's key operation unit 107 and the like. . The display unit 108 is composed of, for example, a liquid crystal display element. Further, the operation of the timing generator 105 is configured to be controlled by the system control unit 106.
[0013]
The disk device 100 performs a well-known correlated double sampling process on the red, green, and blue image signals output from the image sensors 103R, 103G, and 103B, respectively, to reduce reset noise. double sampling) circuits 109R, 109G, and 109B, and red, green, and blue color signals R, G, and B output from the CDS circuits 109R, 109G, and 109B, respectively, amplification processing, shading correction processing, and low light intensity Perform matrix processing after performing gain-up processing, white balance adjustment processing, flare correction processing, pedestal component addition processing, dynamic range compression knee processing, gamma correction processing, white clip processing, black clip processing, etc. Luminance signal Y, red difference signal C_R, Blue difference signal C_BAnd an imaging signal processing unit 110 for obtaining the above. The processing operation of the imaging signal processing unit 110 is configured to be controlled by the system control unit 106.
[0014]
Further, the disk device 100 includes a luminance signal Y and a color difference signal C output from the imaging signal processing unit 110._R, C_BIs converted into a digital signal, and then a recording video signal processing unit 111 for obtaining a digital signal to be recorded on the HD 112 by performing data compression processing, error correction code addition processing, digital modulation processing, etc., and the HD 112 are mounted. The disc drive 113 and the disc drive 113 are controlled, and a digital signal output from the recording video signal processing unit 111 is written to the HD 112 during recording, and a digital signal having a desired content is output according to a request from the system control unit 106 during reproduction. A hard disk control unit 114 that controls the disk drive 113 to read from the HD 112.
[0015]
Here, the hard disk control unit 114 includes a buffer memory 114a, and the digital signal output from the recording video signal processing unit 111 is supplied to the disk drive 113 via the buffer memory 114a of the hard disk control unit 114 and written to the HD 112. At the same time, the digital signal read from the HD 112 is supplied to a reproduction video signal processing unit to be described later via the buffer memory 114 a of the hard disk control unit 114. The digital signal output from the recording video signal processing unit 111 is supplied to the hard disk control unit 114 as an 8-bit or 16-bit parallel signal, for example. The processing operation of the recording video signal processing unit 111 and the control operation of the hard disk control unit 114 are configured to be controlled by the system control unit 106.
[0016]
Further, the disk device 100 performs digital demodulation processing, error correction processing, data expansion processing, and the like on the digital signal read from the HD 112 under the control of the hard disk control unit 114, and then converts the digital signal into an analog signal to convert the luminance signal Y, Color difference signal C_R, C_BA reproduction video signal processing unit 115 for obtaining the image data.
[0017]
Here, a recording format of a digital signal (digital signal output from the recording video signal processing unit 111) to the HD 112 will be described. As shown in FIG. 2, the HD 112 is written with a digital signal divided into files. In this case, the break is set to a certain time, for example, 1 minute. In most cases, the last file in a certain continuous recording is shorter than a certain time. Each file has a recording order, a recording start time, and a recording end time as file identification information. The recording order is, for example, 1 to 65536 (2¹⁶A practically sufficient number is specified as in the above. If only a small value can be specified as the recording order, a file in the same recording order can be created on one HD 112. Although not described above, the digital signal of each file is actually recorded in the file management area of the HD 112 in addition to the file identification information of the recording order, recording start time, and recording end time of each file recorded in the data area. The address information of the recorded data area is recorded.
[0018]
Also, after the entire capacity of the HD 112 has been recorded, the digital signal is overwritten from the oldest file portion of the files recorded on the HD 112 based on the recording start time and recording end time as file identification information. It is configured to be recorded.
[0019]
FIG. 3 shows keys provided in the key operation unit 107. Each key is arranged on the cabinet of the disk device 100 so as to surround the display 108, for example. The key operation unit 107 includes a rewind key 201 for returning the reproduction position to the front, a stop key 202 for stopping the recording operation and the reproduction operation, a reproduction key 203 for starting the reproduction operation, and the reproduction position. A fast-forward key 204 for sending later and a recording key 205 for starting a recording operation are provided.
[0020]
Further, the key operation unit 107 has a save key 206 adjacent to the recording key 205 for setting a predetermined file to prohibit erasure at the time of recording. When the save key 206 is pressed during recording, a file recorded on the HD 112 is set to be erasure-prohibited from a time that is back by a certain time to a time when the save key 206 is pressed again. The Specifically, the erasure prohibition setting is performed by prohibiting erasure of the attribute recorded in the corresponding file portion of the file management area.
[0021]
The key operation unit 107 also moves a file key 207 for displaying a list of files recorded on the HD 112 on the display unit 108 and a cursor for selecting a predetermined file from the files displayed on the display unit 108 as a list. And a save / release key 210 for canceling the prohibition of erasure of the predetermined file and setting the prohibition of the erasure of the predetermined file at the time of reproduction.
[0022]
When the playback key 203 is pressed while a list of files recorded on the HD 112 is displayed on the display unit 108, playback is performed in the recording order from the file selected by the cursor. When the save / cancel key 210 is pressed, a file reproduced from the HD 112 is set to be prohibited from being erased from a time that is back by a certain time to a time when the save / release key 210 is pressed again. If the file selected with the cursor has already been set to be prohibited from being erased, when the save / cancel key 210 is pressed, the prohibition of erasure is cancelled. When the file key 207 is pressed again while the file is displayed as a list on the display unit 108, the display is turned off. The file display on the display unit 108 may be automatically turned off after a predetermined time.
[0023]
The key operation unit 107 also has a margin for adjusting, as a margin time, a certain time that goes back when the save key 206 is pressed during recording and a time that goes back when the save / cancel key 210 is pressed during playback. It has a key 211 and a front key 212 and a rear key 213 for adjusting the time back and forth. When the margin key 211 is pressed, the previously adjusted margin time is displayed on the display unit 108. In this state, the margin time can be adjusted by pressing the front key 212 and the rear key 213. When the margin key 211 is pressed again while the margin time is displayed on the display unit 108, the display is turned off. The display of the allowance time on the display 108 may be automatically turned off after a certain time.
[0024]
In addition, the key operation unit 107 includes a time key 214 for designating an erasure prohibition range of a file recorded on the HD 112, a start key 215 for setting a save start time, and a save end time setting state. And an end key 216. When the time key 214 is pressed, the storage start time and the storage end time are displayed on the display unit 108. For example, the default value of the storage start time is the recording end time of the newest file recorded in the HD 112, and the default value of the storage end time is made equal to the storage start time.
[0025]
When the start key 215 is pressed while the storage start time and the storage end time are displayed on the display unit 108, the storage start time is set, and the front key 212 and the rear key 213 are pressed. The storage start time can be adjusted, and when the end key 216 is pressed, the storage end time is set, and the storage end time can be adjusted by pressing the front key 212 and the rear key 213. Become. Then, when the save / release key 210 is pressed in a state where the save start time and save end time are displayed on the display unit 108, based on the record start time and the record end time as the file identification information, A file recorded on the HD 112 between the storage start time and the storage end time is set to be erasure prohibited.
[0026]
In addition, when the time key 214 is pressed again while the storage start time and the storage end time are displayed on the display unit 108, the display is turned off. The display of the storage start time and the storage end time on the display unit 108 may be automatically turned off after a predetermined time.
[0027]
Next, the operation of the disk device 100 shown in FIG. 1 will be described.
[0028]
Light from the subject incident through the lens block 101 is supplied to the color separation prism 102, and is decomposed into red light, green light, and blue light and guided to the CCD solid-state imaging devices 103R, 103G, and 103B, respectively. Then, a red image, a green image, and a blue image relating to the subject are formed on the imaging surfaces of the imaging elements 103R, 103G, and 103B, respectively, and imaging is performed, and red output from the imaging elements 103R, 103G, and 103B, The green and blue imaging signals are supplied to the CDS circuits 109R, 109G, and 109B, respectively, and subjected to correlated double sampling processing. Further, the red, green, and blue color signals R, G, and B output from the CDS circuits 109R, 109G, and 109B are subjected to processing such as shading correction and white balance adjustment in the imaging signal processing unit 110, and are subjected to luminance signals. Y, color difference signal C_R, C_BIs formed.
[0029]
In this state, when the recording key 205 (see FIG. 3) of the key operation unit 107 is pressed, the luminance signal Y and the color difference signal C output from the imaging signal processing unit 110 are displayed._R, C_BThe recording video signal processing unit 111 performs digital conversion processing, data compression processing, error correction code addition processing, and the like to form a digital signal to be recorded. Then, the digital signal output from the recording video signal processing unit 111 is supplied to the disk drive 113 via the buffer memory 114a of the hard disk control unit 114, and sequentially written into the HD 112 by dividing into files.
[0030]
When the HD 112 is mounted on the disk drive 113, the data in the file management area of the HD 112 is read and supplied to the memory 106a of the system control unit 106 via the hard disk control unit 114 and stored. The data in the file management area of the HD 112 recorded in the memory 106a is used for writing control of a digital signal to the HD 112 during recording and reading control of the digital signal from the HD 112 during playback. In this case, when the data in the file management area of the HD 112 is changed as the digital signal is written to the HD 112, the data in the file management area stored in the memory of the system control unit 106 is also changed accordingly.
[0031]
Further, when erasure prohibition is set for a predetermined file recorded on the HD 112 by operating the key operation unit 107 during recording or reproduction, the data in the file management area stored in the memory 106 a of the system control unit 106 is stored. At the same time, the data in the file management area of the HD 112 is rewritten.
[0032]
FIG. 4 is a flowchart showing the control operation of the system control unit 106 during recording.
[0033]
When the recording key 205 of the key operation unit 107 is pressed to enter the recording mode, first, in step ST1, whether or not the entire capacity of the HD 112 has been recorded, that is, a file (digital signal) is recorded in the entire data area of the HD 112. It is determined whether or not it has been done. When it is determined that the entire capacity is not recorded and there is an empty area, the digital signal is recorded in the empty area in step ST2, and the process proceeds to step ST3. On the other hand, when it is determined that the entire capacity has been recorded, in step ST4, the digital signal is overwritten and recorded in the oldest file portion of the HD 112 (excluding files set to be erasure prohibited). move on.
[0034]
In step ST3, it is determined whether or not the storage key 206 (see FIG. 3) of the key operation unit 107 has been pressed (first time). When it is determined that the pressing operation is not performed, the process proceeds to step ST5. On the other hand, when it is determined that the pressing operation has been performed, the file recorded on the HD 112 is set to be erasure-prohibited from a time that is back by a certain time (room time) in step ST6, and the process proceeds to step ST5.
[0035]
In step ST5, it is determined whether or not the storage key 206 of the key operation unit 107 has been pressed (second time). When it is determined that the pressing operation has not been performed, the process proceeds to step ST7. On the other hand, when it is determined that the pressing operation has been performed, the setting of the file recorded on the HD 112 to be prohibited from being erased is canceled in step ST8, and the process proceeds to step ST7.
[0036]
In step ST7, it is determined whether or not the stop key 202 (see FIG. 3) of the key operation unit 107 has been pressed. When it is determined that the pressing operation has not been performed, the process returns to step ST1 and the same control operation as described above is repeated. On the other hand, when it is determined that the stop key 202 is pressed, the recording operation of the digital signal to the HD 112 is terminated.
[0037]
Note that the pressing operation of the save key 206 repeats the first time and the second time alternately. Therefore, by repeating the first and second pressing operations of the save key 206, it becomes possible to set erasure prohibition to a plurality of file ranges recorded on the HD 112.
[0038]
Next, an operation during reproduction of the disk device 100 shown in FIG. 1 will be described. When playing back a file recorded on the HD 112, first, the file key 207 of the key operation unit 107 is pressed, and a list of files recorded on the HD 112 is displayed on the display unit 108 as shown in FIG. And In this case, the recording order, recording start time, and recording end time of each file are displayed, and a predetermined mark 221 is displayed on the file portion that is set to be erasure-prohibited. Further, a cursor 220 for selecting a file is also displayed.
[0039]
In a state where the list of files is displayed on the display unit 108, the user presses the up key 208 and the down key 209 to move the cursor 220 up and down to select a predetermined file to start reproduction. FIG. 5 shows a state where the file 3 is selected by the cursor 220. When the reproduction key 203 is pressed while a predetermined file to be reproduced is selected, reproduction is performed in the recording order from the file selected by the cursor 220. In FIG. 1, the digital signal reproduced from the HD 112 is supplied from the disk drive 113 to the reproduction video signal processing unit 115 via the buffer memory 114a of the hard disk control unit 114, and digital demodulation processing and error correction are performed on the digital signal. After processing, data expansion processing, etc., it is converted into an analog signal, and a luminance signal Y, a color difference signal C_R, C_BIs obtained.
[0040]
When the save / cancel key 210 is pressed during playback, files that are played back from the HD 112 from the time that is back by a certain time (allowance time) to the time when the save / release key 210 is pressed again. Set to erasure prohibition. Similar to the case of the save key 206 at the time of recording described above, by repeating the first and second pressing operations of the save / release key 210, it is possible to set erasure prohibition to a plurality of file ranges recorded on the HD 112. become.
[0041]
In addition, when the file selected with the cursor is already set to the deletion prohibition while the file is displayed as a list on the display unit 108, if the save / release key 210 is pressed, the deletion prohibition setting is set. Is released, and the mark 221 displayed on the display unit 108 is also erased.
[0042]
Next, a description will be given of an operation for adjusting, as a margin time, a fixed time that goes back when the save key 206 is pressed during recording and a fixed time that goes back when the save / release key 210 is pressed during playback.
[0043]
When adjusting the fixed time (margin time), first, the margin key 211 of the key operation unit 107 is pressed, and the previously adjusted margin time is displayed on the display unit 108 as shown in FIG. In this state, the margin time is adjusted to be shortened by pressing the front key 212, while the margin time is adjusted to be longer by pressing the rear key 213.
[0044]
Next, an operation for setting the prohibition of erasure of a predetermined file recorded on the HD 112 by designating the storage start time and the storage end time will be described.
[0045]
When setting the storage start time and the storage end time, first, the time key 214 of the key operation unit 107 is pressed, and the default values of the storage start time and the storage end time are displayed on the display unit 108 as shown in FIG. . When the start key 215 is pressed in this state, the storage start time is set, and the front key 212 and the rear key 213 are pressed to adjust the storage start time. In this case, when the storage start time is changed, the storage end time is also changed at the same time. Further, the end key 216 is pressed to enter a storage end time setting state, and the front key 212 and the rear key 213 are pressed to adjust the storage end time.
[0046]
When the storage start time and the storage end time are displayed on the display unit 108 as described above, the storage / release key 210 is pressed to record the data on the HD 112 between the storage start time and the storage end time. The deleted file is set to prohibit deletion. In this case, a file to be set to be erase-inhibited is determined with reference to the recording start time and recording end time of each file recorded as file identification information in the file management area of the HD 112.
[0047]
Although not described above, the system control unit 106 uses the data in the file management area of the HD 112 stored in the memory 106a to save the time of the area excluding the file part that is already set to be erasure prohibited (storable time). Is calculated and the time is displayed on the display 108.
[0048]
As described above, in the present embodiment, when the entire capacity of the HD 112 is already recorded, overwriting is performed from the oldest file portion. For this reason, when important recording is finished, the important file can be easily saved by taking a means for saving the file recorded on the HD 112.
[0049]
Further, by pressing the save key 206 during recording, files recorded on the HD 112 can be set to be prohibited from being erased from a time that is back by a certain time (margin time) to a time when the save key 206 is operated again. Also, by pressing the save / cancel key 210 during playback, files that are played back from the HD 112 are set to be prohibited from being erased by a time that the save / cancel key 210 is operated again from a time that is back by a certain time (room). it can. Also, by pressing the time key 214 or the like to set the storage start time and the storage end time, and pressing the save / release key 210, the files recorded between the storage start time and the storage end time are deleted. Can be set to prohibited. In this way, overwriting recording is prohibited in the file portion set to be erase-prohibited. Therefore, important files can be easily saved.
[0050]
In addition, since the time of the area (storable time) excluding the file part set to prohibition of erasure is calculated and displayed on the display unit 108, the user can easily know the storable time of the HD 112. .
[0051]
In the above-described embodiment, the recording medium is the HD 112. However, the present invention can be similarly applied to a recording medium using another disk-shaped recording medium or a tape-shaped recording medium.
[0053]
【The invention's effect】
  ThisSince the video signal recording apparatus and the video signal reproducing apparatus according to the invention can set the predetermined file on the recording medium to be prohibited from being erased and prohibit overwrite recording, it is possible to easily store important files. And, by pressing the save key during recording or playback and setting the file to be prohibited from erasing from a time that has been traced back by a certain time, it is possible to prohibit erasure without leaking important files confirmed by the user during recording or playback. Can be set.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a camera-integrated disk device as an embodiment;
FIG. 2 is a diagram showing a recording format of a video signal to a hard magnetic disk (HD).
FIG. 3 is a diagram showing a key arrangement of a key operation unit.
FIG. 4 is a diagram for explaining a recording operation on a hard magnetic disk (HD).
FIG. 5 is a diagram for explaining an operation during reproduction;
FIG. 6 is a diagram for explaining a margin time adjustment operation;
FIG. 7 is a diagram for explaining a setting operation for prohibiting file erasure by time designation;
[Explanation of symbols]
100 Camera integrated disc device
103R, 103G, 103B CCD solid-state imaging device
106 System control unit
107 Key operation unit
108 Display
110 Imaging signal processor
111 Recording video signal processor
112 Hard type magnetic disk (HD)
113 disk drive
114 Hard disk controller
115 Playback video signal processor
206 Save key
210 Save / Release key

Claims (4)

In a video signal recording apparatus for recording a video signal divided into files on a recording medium,
A file storage means for setting a predetermined file recorded on the recording medium to prohibit erasure, and a storage key ;
Said file storage means, when the storage key is operated during recording, to set the erasure prohibition a file recorded on the recording medium from the time going back by a predetermined time to the time when the save key is operated again A video signal recording apparatus. Video signal recording apparatus according to claim 1, characterized in that that have a time setting means for setting the predetermined time. In a video signal reproducing apparatus for reproducing a video signal from a recording medium in which the video signal is recorded divided into files,
A file storage means for setting a predetermined file recorded on the recording medium to be erasure prohibited, and a storage key;
Said file storage means, when the storage key is operated during playback, to set the erasure prohibition a file reproduced from the recording medium from the time going back by a predetermined time to the time when the save key is operated again A video signal reproducing apparatus characterized by the above. Video signal reproducing apparatus according to claim 3, characterized in that that have a time setting means for setting the predetermined time.

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