JPH11275494A - Reproducing device, recording and reproducing device incorporating video camera, and computer readable storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display corrected date and time at the time of reproduction in the case that a recording/reproducing device incorporating a camera is moved to an area with a time difference and an image is photographed and recorded with a date and a time without correction of a built-in clock. SOLUTION: A device is moved from Tokyo to New York, an image is photographed by an image pickup section 4 without correction of a time difference in an internal clock 24, and a video signal and an audio signal are recorded on a magnetic tape together with a data and time denoted by the clock section 24 with a recording signal processing section 19 via a mechanism section 21. In the case of reproduction, a reproduction signal is switched by a data changeover section 20a, and the video signal and the audio signal are processed respectively. The reproduced data and time are fed from a sub-code processing section 11 to a system control section 23, where the time difference is corrected based on time difference correction information in response to data 'New York' entered in advance through a key operation, and the result is superimposed on a video image through an on-screen display control section 18 and displayed on a liquid crystal display monitor section 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus, a video camera-integrated recording / reproducing apparatus, and a computer which are suitable for use when recording and reproducing the date and time at the time of shooting together with a video signal on a recording medium by an internal clock. It relates to a readable storage medium.

[0002]

2. Description of the Related Art Conventionally, when moving to an area where a time difference occurs and taking an image, a method for correcting the time difference of the date and time is as follows.
A method of resetting the reference date and time itself to the local date and time, a method of correcting the date and time in advance using the world clock function, etc., and recording, a position and time information by the GPS receiver There is a method of correcting the date and time after recording based on the information, a method of recording the position and time information as it is, and correcting the date and time at the time of reproduction from the information. All of these methods correct date / time data at "recording time" or record information data necessary for correction at "recording time" together with a video signal.

[0003] Further, in the case where the time difference is corrected with respect to the conventional reference date and time, as a method of returning from the state where the time difference is corrected to the state before the correction, a method of returning by a menu operation and a return key are provided. How to operate sequentially,
There was a method of operating one key several times.

[0004]

However, in the above-mentioned conventional example, it is necessary to reset the clock to the local date and time before photographing, or to perform the time difference correction work using the conventional world clock function. It was very troublesome. In addition, when using these methods, when returning from an area with a time difference to an area without a time difference, the time and date set once and the time difference correction using the world clock can be adjusted by performing the same key operations as the setting multiple times. I had to return to the state and it was troublesome. Also GP
Adding an automatic time difference correction function using an S receiving apparatus to a camera-integrated recording / reproducing apparatus has a serious problem in that it is very large, and the whole system becomes complicated, large, and expensive.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to enable time difference correction at the time of reproduction and to enable recovery from the time difference correction state by operating one key once.

[0006]

A reproducing apparatus according to the present invention reproduces a recording medium and outputs a reproduced signal, an extracting means for extracting clock data included in the reproduced signal, and a time difference correcting means. Input means for inputting correction information for performing the correction, and correction means for correcting the time difference of the extracted clock data based on the input correction information are provided.

In the video camera-integrated recording / reproducing apparatus according to the present invention, an image pickup means for picking up an image of a subject and outputting a video signal, a clock means for generating clock data, and recording the video signal together with the clock data on a recording medium. Recording / reproducing means for performing reproduction and reproduction, extraction means for extracting the clock data from the reproduced signal, input means for inputting correction information for performing time difference correction, and inputting the extracted clock data to the input signal. Correction means for correcting the time difference based on the correction information is provided.

In the storage medium according to the present invention, a reproduction process for reproducing a recording medium and outputting a reproduction signal, an extraction process for extracting clock data included in the reproduction signal, and correction information for performing time difference correction are performed. A program for executing an input process for input and a correction process for correcting a time difference of the extracted clock data based on the input correction information is stored.

In another storage medium according to the present invention, an imaging process for imaging a subject and outputting a video signal, a clock process for generating clock data, and recording and reproducing the video signal together with the clock data on a recording medium. Recording and reproduction processing, extraction processing for extracting the clock data from the reproduced signal, input processing for inputting correction information for performing time difference correction, and extracting the extracted clock data to the input correction information. And a correction process for performing a time difference correction based on the time difference.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described for a case where the present invention is applied to a camera-integrated VTR with a liquid crystal monitor conforming to the consumer digital VTR standard. FIG.
FIG. 3 is a functional block diagram of a camera-integrated VTR.
In FIG. 1, reference numeral 1 denotes a microphone unit for collecting sound, 2 denotes an audio signal processing unit for performing predetermined signal processing on an audio signal taken in from the microphone unit 1, and 3 denotes conversion of an analog audio signal into a digital audio signal. An A / D converter 4 for capturing an image of a subject; 6, an A / D converter for converting an analog video signal into a digital video signal; A video signal processing unit for performing predetermined signal processing on the video signal, and a camera system control unit 7.
It is composed of a microcomputer or the like, and controls the entire camera system according to instructions from the system control unit 23 and the camera system operation unit 25.

Here, the tape recording format in the case of the magnetic recording / reproducing method in the consumer digital VTR standard in the present embodiment will be briefly described. As shown in FIG. 2, the tape format includes a subcode recording area in which arbitrary information such as shooting (recording) date and time information, character code information, and cue information is recorded, and a digital video signal (luminance signal and color signal). , An audio recording area in which a digital audio signal is recorded, and an ITI (Insert) in which information such as a track ID is recorded.
and Track Information) recording area.

Next, in FIG. 1, reference numeral 8 denotes a subcode data encoding unit for performing D / D conversion on the current date and time generated by the clock unit 24 so that the signal can be digitally recorded in the subcode recording area. Reference numerals 10 and 10 denote subcode data detectors that detect and output subcode data. Reference numeral 19 denotes a recording signal processing unit including a data switching unit 19a for switching and outputting a digital audio signal, a digital video signal, and sub-code data, respectively. Reference numeral 21 denotes a magnetic tape (not shown) for each digital signal from the recording signal processing unit 19. 3) is a mechanical section including a magnetic head for recording and reproducing digital signals recorded on a magnetic tape.

Reference numeral 20 denotes a reproduced signal processing unit including a data switching unit 20a for switching and outputting digital audio signals, digital video signals, and subcode data reproduced by a mechanical unit 21 including a magnetic head, and 14 denotes a data switching unit. A D / A conversion unit for converting the digital audio signal switched and separated in 20a into an analog audio signal, an audio signal processing unit 13 for performing predetermined signal processing on the converted analog audio signal, and an audio output unit 12 It is a speaker unit.

Further, reference numeral 17 denotes a D / A conversion unit for converting the digital video signal switched and separated by the data switching unit 20a into an analog video signal, and 16 denotes a recording for performing predetermined signal processing on the converted analog video signal. Signal processing unit, 1
Reference numeral 8 denotes an OSD (On Screen Display) unit for superimposing various information such as date and time in accordance with an instruction from the system control unit 23.
5 is a liquid crystal monitor for displaying the video obtained from the recording signal processing unit 16 and the superimposition information obtained from the OSD unit 18. 9 is the subcode data (photographing date, A subcode / data decoding unit that performs D / D conversion on time data and the like.

Reference numeral 24 denotes a clock unit for generating a photographing date / time; 25, a camera system operation unit including various switches ([ZOOM], [FOCUS], etc.) related to operation of the camera system; Various switches related to the system and the entire device ([UP], [DOWN], [MEN]
U], [PLAY], [FF / REW], [STO
P], [START / STOP], etc., and a VTR system operation unit 27 is a power supply mode (camera / V
TR / off) power supply mode switch section, 28
Is an infrared remote control signal receiving unit for receiving a remote control signal and transmitting a remote control code to the system control unit 23.

Reference numeral 23 denotes a system control unit, which comprises a microcomputer or the like that comprehensively controls various functions of the above-described camera-integrated VTR, has various functions including a timer function, and controls a power supply mode. It mainly controls the operation mode transition of the VTR block, controls various information displays, stores and holds various shooting modes, and the like.

Reference numeral 29 denotes a storage medium according to the present invention for storing the microcomputer control program. The control program includes FIGS. 3, 4, 6, 8, and 10 described below.
And a program for executing the processing according to the flowchart shown in FIG. As the storage medium 29, a semiconductor memory, an optical disk, a magneto-optical disk, a magnetic medium, or the like may be used. In addition, they are ROM, RAM, CD-ROM,
The present invention may be applied to a memory card, a floppy disk, a magnetic tape, or the like.

Next, the operation of the camera-integrated VTR having the above configuration will be described. First, at the time of recording (at the time of imaging),
The audio signal fetched from the microphone unit 1 is subjected to predetermined signal processing by the audio signal processing unit 2 and then converted to a digital signal by the A / D conversion unit 3, and the data switching unit 19 a of the recording signal processing unit 19 Is input to The video signal captured from the imaging unit 4 is converted into a digital signal by the A / D conversion unit 6, subjected to predetermined signal processing by the video signal processing unit 5, and then subjected to data switching of the recording signal processing unit 19. Input to the unit 19a.

At the same time, the date / time data as the current clock data from the clock unit 24 is converted into a signal which can be digitally recorded in the subcode recording area of the magnetic tape by the subcode / data encoding unit 8. After the / D conversion, the data is continuously input to the data switching unit 19a of the recording signal processing unit 19 via the subcode / data detection unit 10.

In the data switching section 19a, a digital video signal, shooting date / time data (clock data) as subcode data, and IT data are recorded in accordance with a tape recording format (see FIG. 2) in the consumer digital VTR standard.
Each data is switched and output so that the I data is recorded in a predetermined recording area, and is supplied to the mechanical unit 21 including the magnetic head. As described above, the digital audio signal, the digital video signal, and the data indicating the shooting date / time are digitally recorded simultaneously and continuously in another area on a magnetic tape (not shown). Become.

Next, at the time of reproduction, a digital audio signal, a digital video signal read by the magnetic head 21, shooting date / time data as subcode data, and IT
The I data is always input to the data switching unit 20a, and is switched and extracted in time series, and is output. The digital audio signal from the data switching unit 20a is converted into an analog audio signal by the D / A conversion unit 14, and then subjected to predetermined signal processing by the audio signal processing unit 13 and is output as audio from the speaker unit 12. Further, the digital video signal from the data switching unit 20a is converted into an analog video signal by the D / A conversion unit 17, and is subjected to predetermined signal processing by the recording signal processing unit 16.

At the same time, the shooting date / time data (clock data) as the reproduced subcode data from the data switching unit 20a is output from the subcode / data detection unit 1.
The signal is subjected to D / D conversion by the subcode / data decoding unit 9 via the “0”, and is input to the system control unit 23. The system control unit 23 performs a time difference correction process on the reproduced shooting date / time data based on the correction information on the time difference input in advance by the user, and then converts the data into character display data to perform OSD control. Output to the unit 18. The character display data is further converted into superimposed data by the OSD control unit 18 and output to the liquid crystal monitor unit 15 together with the video signal from the recording signal processing unit 16. On the liquid crystal monitor section 15, the shooting date / time corrected for the time difference is superimposed and displayed together with the reproduced video.

FIGS. 3 and 4 are operation flowcharts when the correction information relating to the time difference is input by a menu according to the first embodiment of the present invention, and FIG. 5 is a display example of the liquid crystal monitor in operation. FIG. 5A shows a camera-integrated VTR in which the date and time of the clock unit 24 have been set using “Tokyo”.
This shows a case where a video shot and recorded using “New York” is reproduced with the date and time superimposed. Here, since the above “time difference correction” has not been performed, the captured image has the sun 11
It is displayed at 22 hours, which indicates that the time differs from the local time at the time of shooting.

Hereinafter, "time difference correction" in the present embodiment will be described.
Will be described with reference to the operation flowcharts of FIGS. In step S302 (hereinafter, the steps are omitted), the process waits until the [MENU] Key is pressed. When the key is pressed, the menu mode is started in S303, and FIG.
The menu screen of (b) is displayed. First, a reference city name for time difference correction is set. If [UP] Key or [DOWN] is pressed in S304, S3
At 05, the menu cursor is moved up or down. The user repeats the operations of S304 and S305 until the position of the menu cursor is changed to "Set" in S306.

[0025] The menu cursor is set to "Reset".
When [SET] Key is pressed at the position (S307),
The mode is changed to the "request setting" mode. [U in S308
When [P] Key or [DOWN] Key is pressed, S
In step 309, the "data" is incremented by one. Here, since the description is made on the assumption that the date and time have been set in "Tokyo", the user repeats the operations of S308 and S309 until the caller status becomes "10 / Tokyo" (see FIG. 5C). In this state, [SE
When [T] Key is pressed (S311), the key is set to “10 / Tokyo” and the screen returns to the original menu screen.

Next, a city name to be corrected is selected. S
If [UP] Key or [DOWN] Key is pressed in 312, the menu cursor is moved up or down in S313. The user proceeds to steps S312 and S31 until the menu cursor position is changed to "select" in step S314.
The operation of No. 3 is repeated (see FIG. 5D). When the menu cursor is at the position of “Stuight selection”, press [SET] Key.
Is pressed (S315), the mode is changed to the "selection".

In step S316, [UP] Key or [DOW]
When [N] is pressed, the value of the "Saturation" data is incremented by +1 or -1 in S317. In this case, the explanation is made on the assumption that the photographing was performed in "New York".
The operations of S316 and S317 are repeated until the saturate becomes "20 / New York" at 18 (see FIG. 5E). When [SET] Key is pressed in this state (S3
19), the date is set to "20 / New York", and the screen returns to the original menu screen (see FIG. 5 (f)).
When [MANU] Key is pressed in S320, S321 is pressed.
To end the menu mode and turn off the menu screen display, and waits for the [PLAY] Key to be pressed in S322.

When [PLAY] Key is pressed, S32 is pressed.
At 3, the reproducing operation is started. At this time, it is determined in S324 whether or not the subcode / data date / time data from the subcode / data decode unit 9 in FIG. 1 is recorded. If the data is recorded, the process proceeds to S325 in order to correct the time difference. Branch. In step S325, it is determined whether or not “request” has been set. If not, the flow branches to step S329 without performing time difference correction. If it has been set, a comparison is made between "Kitoshitoshi" and "Satsuiteshi" in S326. Even if the two city names are the same, there is no need to correct the time difference, so the flow branches to S329.

If the city names are different, the time difference between "Kyentoshi" and "Satsuiteshi" is calculated in S327, and S328
The time difference correction process is performed on the date / time data reproduced in step 2. Here, the time difference information with respect to the corresponding Greenwich Mean Time (or a specific city such as Tokyo may be set as the standard time) is internally assigned to the city names of “Kyentoshi” and “Satsuiteshi”, respectively, The time difference can be easily obtained by the subtraction. Based on the time difference data thus obtained, the time difference is corrected in consideration of the date change line.

In S329, the date / time data is stored in the OSD
The data is converted into character display data, and the date / time display is superimposed on the reproduced video in S320. Thereby, as shown in FIG. 5 (g), the local time (New York) time “9:22 am” at the time of shooting is displayed.

Next, a second embodiment will be described. In the first embodiment, the case where the reference city name and the city name to be corrected are specified by the menu has been described as the information input method for the time difference correction. Then, as information about the time difference,
Set the time. Next, a description will be given using the operation flowchart of FIG. 6 and the display example of the liquid crystal monitor of FIG. Note that the overall system configuration is the same as that in FIG.

FIG. 7 (a) shows a video taken in New York using a camera-integrated VTR with date and time settings in "Tokyo", with the date and time superimposed. It has been regenerated. Since the "time difference correction" described above has not been performed, even though the captured image has the sun, it is displayed at 11:22 at night, which is different from the local time at the time of shooting.

First, in step S502, the reproduced subcode
It is determined whether the date / time data is included in the data. If not, the process is repeated until the data can be detected.
If it is included, [UP] Ke in S503
It is determined whether or not y is pressed.
And the time difference information is incremented by 1 to turn on the time difference correction time display. If it is off, it is determined in step S505 whether or not the [DOWN] Key is pressed. If it is on, the time difference information is decremented by one in step S506, and the time difference correction time display is turned on. S5 if off
Branch to 02. In S507, the reproduced date / time data is subjected to a time difference calculation process based on the time difference correction time set in S504 or S506. In S508, the date / time data is converted into OSD character display data, and in S509, the date / time data is converted. Superimpose the time display on the playback video.

FIG. 7B shows a display example when the above-mentioned [DOWN] Key is depressed once to set it to [-1].
M11: 22 is corrected to PM10: 22. FIG. 7 shows that the time difference “−14 hours” between “Tokyo” and “New York” is set by repeating the above operation.
(C), and the local (New York) time “9:22 am” at the time of shooting is displayed as shown here.

Next, a third embodiment will be described. In the third embodiment, among the information on the time difference in the first embodiment, the information on the time serving as the reference for the time difference correction is set to “time”, and the clock unit 24 inside the device is set. . Next, the operation will be described with reference to the operation flowchart of FIG. 8 and the display example of the liquid crystal monitor of FIG.
Note that the overall system configuration is the same as that in FIG.

When the clock setting mode is started in S701, the display of the clock setting mode is started in S702. In step S703, the “request” part flashes and is displayed.
This indicates that the status is “set” (FIG. 9
(A)). In step S704, the user operates the [UP] and [DOWN] keys to set "Request" (here, Tokyo). After confirming the completion of the setting of the “request” in step S705, the process proceeds to step S706, and the “request” is determined.
Is turned on, and the "year" digit to be set next is blinked (see FIG. 9B). [UP], [DO] in S707
[WN] key operation to set the "year" digit.

In step S708, it is confirmed that the setting of the "year" digit is completed. Then, the flow shifts to step S709, where the "year" digit is turned on, and the "month" digit to be set next is turned on and off. Similarly,
Set “month”, “day” and “hour”. After the above operation, the flow shifts to S720, where the "hour" digit is turned on and the "minute" digit to be set next is turned on and off (see FIG. 9 (c)). S7
At 21, the "minute" digit is set by operating the [UP] and [DOWN] keys. After confirming that the setting of the "minute" digit has been completed in S722, the flow shifts to S723, where "date / time" is displayed normally, and the clock setting ends.

Next, a fourth embodiment will be described. In the fourth embodiment, the correction state of the time difference using the conventional world clock and the correction of the time difference correction according to the above-described embodiment can be returned to the state before the correction by operating the key once. . Next, the operation flowchart of FIG.
This will be described with reference to a liquid crystal monitor display example of No. 1. Note that the entire system configuration is the same as in the first embodiment, and a description thereof will be omitted.

First, in S902, it is determined whether or not the current time difference is being corrected. If not, the determination in S902 is repeated because it has nothing to do with the present description. If the time difference correction has been performed, the flow branches to S903 to determine whether or not the time difference correction mode release SW provided in the VTR operation unit 26 has been pressed. FIG. 11A shows a display example of the liquid crystal monitor in a state where the time difference is corrected. "New York" currently being played is displayed.
If the release switch has been pressed in step S903, the flow branches to step S904 to cancel (release) the currently performed time difference correction and return to the state before correction. Then, in step S905, the display returns to the display time, the display of the area name is turned off, and the date and time of the display are displayed (see FIG. 11B).

In the above embodiment, an example has been described in which the present invention is applied to a camera-integrated VTR. However, the present invention can be applied to other video cameras such as a digital camera.

[0041]

As described above, according to the first aspect, when reproducing the recording medium on which the clock data indicating the date / time is recorded, the reproduced clock data is read by the input correction information. Time difference can be corrected. Therefore, for example, even if a recording medium on which clock data is recorded without time difference correction is reproduced in an area having a time difference, the reproduced time data can be corrected for time difference.

According to the second aspect of the invention, when shooting and recording are performed in a region having a time difference without performing the time difference correction of the clock means, the time difference can be corrected according to the correction information input at the time of reproduction. For this reason, even after shooting and recording in an area having a time difference, there is an effect that the time difference of the clock data can be corrected at the time of reproduction.

Further, in realizing the first and second aspects of the present invention, no special additional hardware function (such as GPS) is required, and the same configuration as that of the conventional video camera integrated recording / reproducing apparatus system is employed. Therefore, there is an effect that the cost, shape, and the like can be kept as they are.

According to the third aspect of the present invention, the area name is used as the correction information, and the time difference information corresponding to the area name is provided, so that the time difference between the reference area and the photographed area is not known. There is an effect that the correction information can be input only by inputting the area name.

According to the fourth aspect, since the time difference between the regions is used as the correction information, there is an effect that the correction information can be input by a simple operation.

According to the fifth aspect, the data whose time difference has been corrected at the time of reproduction can be displayed on the display means and provided to the user.

According to the sixth aspect of the present invention, the information relating to the time serving as the reference for the time difference correction is set as the area name in the clock means inside the apparatus. There is an effect that it is not necessary to input information one by one.

Further, according to the seventh aspect of the present invention, the time difference correction state is released by one key operation once, so that the time difference correction state can be released by a simple operation.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a camera-integrated digital VTR according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a tape recording format (consumer digital VTR standard) of a VTR unit in a camera-integrated VTR.

FIG. 3 is an operation flowchart according to the first embodiment of the present invention.

FIG. 4 is a configuration diagram showing an operation flowchart according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram showing a display example of a liquid crystal monitor according to the first embodiment.

FIG. 6 is an operation flowchart according to the second embodiment.

FIG. 7 is a configuration diagram illustrating a display example of a liquid crystal monitor according to a second embodiment.

FIG. 8 is an operation flowchart according to a third embodiment.

FIG. 9 is a configuration diagram illustrating a display example of a liquid crystal monitor according to a third embodiment.

FIG. 10 is an operation flowchart according to a fourth embodiment.

FIG. 11 is a configuration diagram showing a display example of a liquid crystal monitor according to a fourth embodiment.

[Explanation of symbols]

 Reference Signs List 4 imaging unit 5 video signal processing unit 9 subcode data decoding unit 10 subcode data detection unit 11 subcode data processing unit 15 liquid crystal monitor unit 16 recording signal processing unit 18 OSD control unit 19 recording signal processing unit 20 playback signal processing unit 21 Mechanical unit 22 Recorder unit 23 System control unit 24 Clock unit 25 Camera system operation unit 26 VTR system operation unit 28 Infrared remote control signal receiving unit 29 Storage medium

Claims (18)

[Claims] 1. A reproducing means for reproducing a recording medium to output a reproduced signal, an extracting means for extracting clock data included in the reproduced signal, an input means for inputting correction information for performing time difference correction, A playback device comprising: a correction unit configured to perform a time difference correction on the extracted clock data based on the input correction information. 2. The reproducing apparatus according to claim 1, wherein the correction information is an area name, and the correction means holds time difference information corresponding to the area name. 3. The reproducing apparatus according to claim 1, wherein the correction information is a time difference between regions. 4. The reproducing apparatus according to claim 1, further comprising display control means for controlling display of the corrected clock data on a display means. 5. The reproducing apparatus according to claim 1, further comprising a canceling means for canceling the time difference correction operation by one key operation and returning to a state before the time difference correction. 6. An image pickup means for picking up an image of a subject and outputting a video signal; a clock means for generating clock data; a recording / reproducing means for recording and reproducing the video signal together with the clock data on a recording medium; Extracting means for extracting the clock data from the extracted signal, input means for inputting correction information for performing time difference correction, and correcting means for correcting the extracted clock data for time difference based on the input correction information. A video camera-integrated recording / reproducing device equipped with: 7. The video camera-integrated recording / reproducing apparatus according to claim 6, wherein said correction information is an area name, and said correction means holds time difference information corresponding to the area name. 8. The video camera-integrated recording and reproducing apparatus according to claim 6, wherein the correction information is a time difference between regions. 9. The apparatus according to claim 1, further comprising setting means for setting clock data in said clock means and setting an area name indicating which area the set clock data is based on. Item 7. A video camera-integrated recording / reproducing device according to Item 7 or 8. 10. The video camera-integrated recording / reproducing apparatus according to claim 6, further comprising a display control means for performing control for displaying the corrected clock data on a display means. 11. The video camera-integrated recording / reproducing apparatus according to claim 6, further comprising a canceling means for canceling the time difference correction operation by one key operation and returning to a state before the time difference correction. 12. A reproduction process for reproducing a recording medium and outputting a reproduction signal, an extraction process for extracting clock data included in the reproduction signal, an input process for inputting correction information for performing time difference correction, A computer-readable storage medium storing a program for executing a correction process for correcting a time difference of the extracted clock data based on the input correction information. 13. An image capturing process for capturing an image of a subject and outputting a video signal; a clock process for generating clock data; a recording / reproducing process for recording and reproducing the video signal together with the clock data on a recording medium; Extraction processing for extracting the clock data from the extracted signal, input processing for inputting correction information for performing time difference correction, and correction processing for correcting the extracted clock data for time difference based on the input correction information. Computer-readable storage medium storing a program for executing the program. 14. The computer-readable storage medium according to claim 12, wherein the correction information is an area name, and the correction processing holds time difference information corresponding to the area name. 15. The computer-readable storage medium according to claim 12, wherein the correction information is a time difference between regions. 16. A setting process for setting clock data for the clock processing and setting a region name indicating which region the set clock data is based on. The computer-readable storage medium according to claim 14 or 15, wherein 17. The computer-readable storage medium according to claim 12, further comprising a display control process for performing control for displaying the corrected clock data on a display unit. 18. The computer-readable storage medium according to claim 12, further comprising a canceling process for canceling the time difference correction operation by one key operation and returning to a state before the time difference correction.