JP2001218141A - Recorder for video signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camcorder that can enhance the user-friendliness in the case of displaying a date and a time. SOLUTION: The camcorder is provided with a recording circuit 14 that records a video signal onto a recording medium and a clock circuit 32 that counts a current date and time, and also with an operation means 34 and a control circuit 31 that controls the display of date and time. In the case of recording, the recording circuit 14 records the date and time counted by the clock circuit 32 in a way that the date and time can be separated from the video signal in the case of reproduction. The control circuit 31 starts display of the date and time counted by the clock circuit 32 at application of power and stops the display of the date and time after a lapse of a prescribed time from the start of display. When an operation means 34 is operated, the control circuit 31 stops the display of the date and time even when the prescribed period is not passed from the start of display.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a video signal recording device.

[0002]

2. Description of the Related Art A VTR integrated with a video camera has a function of displaying a date and time on a monitor screen and recording the date and time on a tape. In a digital VTR that records and reproduces a video signal in the form of a digital signal, the date and time data is
It is recorded separately from the video signal.

[0003] Therefore, at the time of reproduction, the date and time are not displayed on the reproduction screen, and, for example, there is no hindrance when the video signal is used secondarily. In addition, when necessary, it is possible to know the recorded date and time.

[0004]

However, when date and time data is recorded separately from a video signal,
How to check the date and time becomes a problem.

That is, to confirm the date and time,
To display this, (1) When a specific button is operated, the date and time are displayed. (2) Display the date and time for a certain period from power-on. Can be considered. In both cases, the date and time are usually displayed on the screen of the recording monitor.

The method (1) includes a method of providing a dedicated operation button for displaying the date and time, and a method of displaying a menu and selecting a date and time display item from the menu. There is. However, in the former method, the number of operation buttons increases, and in the latter method, the display operation is troublesome.

[0007] The method of item (2) includes a method for starting recording even within the date and time display period, and a method for recording after the end of the date and time display period. There are ways to get started. However, in the former method, the recorded image may be mistaken for including the date and time numerals, and in the latter method, the shutter chance is missed, and the beginning of the recording may be missing. is there.

[0008] The present invention seeks to solve these problems.

[0009]

According to the present invention, for example, a recording circuit for recording a video signal on a recording medium, a clock circuit for measuring at least one of current date and time information, and an operating means are provided. A control circuit for controlling the display of the information, wherein the control circuit starts displaying the information measured by the clock circuit when the power is turned on, and a predetermined period has elapsed since the start of the display. At this time, the display of the information is stopped, and even when the predetermined period has not elapsed from the start of the display, when the operating means is operated, the display of the information is controlled to be stopped. According to the present invention, there is provided a video signal recording apparatus which records information measured by a clock circuit so that the information can be separated from the video signal during reproduction. Therefore, when the power is turned on, the date and time are displayed for a predetermined period or until the operation button is operated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example in which the present invention is applied to a DV system video camera integrated VTR, and reference numeral 10 denotes the integrated VTR.

The VTR 10 has an imaging section 11 and a signal processing circuit 12. The imaging unit 11 has an imaging lens, a CCD imaging device, and the like, images the subject, and outputs, for example, dot-sequential color signals. The signal processing circuit 12 includes a color difference signal forming circuit, an encoder circuit, and the like, processes the color signal output from the imaging unit 11, and converts the color signal into, for example, an NTSC color video signal S12.

Further, the VTR 10 has a recording circuit 14, a rotary magnetic head 15 for recording and reproduction, and a reproduction circuit 17. The recording circuit 14 has an A / D converter circuit, an encoder circuit for error correction, a modulation circuit for recording, and the like. When the color video signal S12 is supplied to the recording circuit 14, the signal S12 is recorded in the DV system. Convert to a signal.

A magnetic tape 16 is wound around the rotary magnetic head 15 obliquely over a predetermined angular range, and the tape 16 is run at a predetermined speed during recording and reproduction. Then, at the time of recording, a recording signal is recorded as an oblique magnetic track on the tape 16 by the head 15, and at the time of reproduction, the signal is reproduced from the tape 16 by the head 15. Also, the reproduction circuit 17
It has a demodulation circuit for reproduction, a decoder circuit for error correction, a D / A converter circuit, and the like, and extracts the original color video signal S12 from the reproduction signal of the tape 16.

Further, the VTR 10 has a display circuit 23 and, for example, a color LCD panel 24 as a display device or a viewfinder. Then, the display circuit 23 converts the color video signal during recording or reproduction into a display signal corresponding to the LCD panel 24 and supplies the display signal to the LCD panel 24.

A microcomputer 31 is provided for controlling the system.
1 to an imaging unit 11, a signal processing circuit 12, a recording circuit 1
4. A predetermined control signal is supplied to the reproduction circuit 17 and a switch circuit 21 described later. The microcomputer 31 has a clock circuit 32 for measuring the current time.
And the signal forming circuit 33 are connected.

The forming circuit 33 converts the date and time data measured by the clock circuit 32 into a data signal D33 in a recording format and forms a display signal S33 for performing various displays. . in this case,
The display signal S33 is a signal for displaying the date and time converted from the date and time data measured by the clock circuit 32, and a character (including a number and a symbol) indicating the operation state and the enabled function. ) Is displayed.

Further, in the forming circuit 33, a signal indicating the timing when the data signal D33 is recorded is formed and supplied to the switch circuit 13 as a control signal. A signal is formed and supplied to the switch circuit 22 as a control signal. In this example, it is assumed that the display of the date and time is displayed by superimposing on the image captured by the imaging unit 11.

The microcomputer 31 is provided with a routine 100 as shown in FIG. 2, for example, as a part of a program executed by the CPU (not shown). This routine 100 is for controlling the display of date and time, the details of which will be described later. Note that, in FIG. 2, the routine 100 only shows portions related to the present invention.

Further, the microcomputer 31 includes:
Various operation buttons (operation switches) 34 are connected.
A button 34A of the operation buttons 34 is
It functions as a power / mode switch. For example, as shown in FIG.
It has a mode switching position.

In such a configuration, when power is turned on, recording and reproduction operations are performed as follows.

When power is turned on (when in camera mode) This is the case where the operation button 34A is switched from the power-off position to the camera mode position. That is, when this switching is performed, the main power supply of the VTR 10 is turned on from off, and a color signal obtained by capturing an image of the subject is output from the imaging unit 11, and this color signal is converted by the signal processing circuit 12 into a color video signal S12. Will be output.

At this time, the microcomputer 3
1 starts from step 101 of the routine 100. Next, in step 102, the switching position of the operation button 34A is determined. In this case, the position has been switched to the camera mode position. Go to 111.

In this step 111, the switch circuit 21 is connected to the camera side contact C as shown in the figure by a control signal from the microcomputer 31.
Therefore, the color video signal S from the signal processing circuit 12
12 is supplied to the switch circuit 22 through the contact C of the switch circuit 21.

Subsequently, the process proceeds to step 112, in which it is determined whether or not the clock circuit 32 normally counts the date and time. This is because, for example, since this VTR 10 has not been used since the previous year's athletic meet, a backup battery (not shown)
This is because an error may have occurred when the date and time are counted, for example, because the device is down.

When the clock circuit 32 is normally counting the date and time, the process proceeds from step 112 to step 113. In this step 113, predetermined commands and data are supplied to the formation circuit 33, and the display is displayed. The signal S33 is formed. In this case, the display signal S33 includes a date and time display signal formed from the date and time data measured by the clock circuit 32,
And a display signal of an opening message indicating the start of operation of the VTR 10.

Further, at this time, a predetermined control signal is supplied from the forming circuit 33 to the switch circuit 22, and the display signal S 33 is superimposed on the color video signal S 12 from the signal processing circuit 12 from the switch circuit 22. The obtained color video signal is extracted, and the color video signal is supplied to the display circuit 23.

Therefore, on the screen of the LCD panel 24, for example, an opening screen as shown in FIG. 4A is displayed. That is, the imaging unit 1 is controlled by the color video signal S12.
One captured image of the subject is displayed. The display signal S33 causes the date and time measured by the clock circuit 32 to be displayed in superimposition on the lower side of the screen. Further, the opening message is displayed in a superimposed manner at the center of the screen by the display signal S33.

When the operation button 34A is switched from the power-off position to the camera mode position in this manner, for example, an opening screen as shown in FIG. 4A is displayed.

Subsequently, the process proceeds from step 113 to step 121. In this step 121, it is determined whether or not the record button or the play button among the operation buttons 34 is pressed. If neither the record button nor the play button is pressed, the process proceeds from step 121 to step 122. In this step 122, for example, a first predetermined period, for example, 3 seconds after step 113 is executed. It is determined whether the time has elapsed.

When three seconds have not passed,
The process proceeds from step 122 to step 124, in which it is determined whether a second predetermined period, for example, 5 seconds, has elapsed since step 113 was executed. If 5 seconds have not elapsed, the process returns from step 124 to step 122.

Therefore, when the date and time are displayed in step 113, the subsequent steps 121, 12
Since steps 2 and 124 are repeated, when the operation button 34A is switched from the power-off position to the camera mode position, the display state of the opening screen is continued, for example, as shown in FIG. 4A.

However, if three seconds have elapsed since the start of the display of the opening screen, this is displayed at step 122.
And the processing is performed from step 122 to step 1
Proceed to 23. In this step 123, a predetermined command and data are supplied from the microcomputer 31 to the forming circuit 33, and the display signal S33 output from the forming circuit 33 is formed from the date and time data measured by the clock circuit 32. Date and time display signals,
And a display signal indicating an operation state, a valid function, and the like.

Accordingly, on the screen of the LCD panel 24, for example, as shown in FIG. 4B, an image of the subject picked up by the image pickup unit 11 is displayed. The current date and time are displayed by superimposition. In addition, characters indicating the operation state and the enabled functions are displayed above the date and time, and a symbol indicating the remaining amount of the internal battery is displayed in a superimposed manner above the screen.

When three seconds have passed since the operation button 34A was switched from the power-off position to the camera mode position, the opening screen up to that point (for example, FIG.
A) is switched to a screen showing the current state, for example, as shown in FIG. 4B.

Then, the process proceeds from step 123 to step 124, and thereafter, steps 121, 12
Steps 2, 123 and 124 are repeated. Therefore, when three seconds elapse after switching the operation button 34A from the power-off position to the camera mode position, the display state of the screen indicating the current state is continued as shown in FIG. 4B, for example.

However, if five seconds have elapsed since the operation button 34A was switched from the power-off position to the camera mode position, this is detected in step 124, and the processing proceeds from step 124 to step 125.

In this step 125, predetermined commands and data are supplied from the microcomputer 31 to the formation circuit 33, and the display signal S33 output from the formation circuit 33 indicates the operation state, the enabled function, and the like. Only the display signal is used, and the display signal indicating the date and time is not included.

Accordingly, on the screen of the LCD panel 24, for example, as shown in FIG. 4C, an image of the subject imaged by the image pickup unit 11 is displayed, and at the lower side of the screen, the operation state and the effective state are displayed. Characters and the like indicating the function being used are displayed, and a symbol indicating the remaining amount of the built-in battery is displayed by superimposing at the top of the screen.

In this manner, when 5 seconds have elapsed since the operation button 34A was switched from the power-off position to the camera mode position, a screen (for example, FIG. 4B) showing the current state up to that time is displayed as shown in FIG. 4C, for example. The screen is switched to a screen showing a standby state. At this time, the display position of the character is changed to the position where the date and time were displayed, so that the display of the image captured by the imaging unit 11 is not hindered. Thereafter, this display state is continued during standby.

Then, the process proceeds from step 125 to step 131. In this step 131, input of the operation button 34 is awaited. When any one of the operation buttons is pressed, the process proceeds from step 131 to step 132, and A process corresponding to the pressed operation button is executed.

When, for example, the opening screen of FIG. 4A is displayed on the LCD panel 24, or when the screen of the current state of FIG. 4B is displayed, for example, steps 121 to 124 are repeated. At this time, when the record button or the play button of the operation buttons 34 is pressed, this is detected in step 121, and the process proceeds from step 121 to step 141.

In this step 141, as in step 125, predetermined commands and data are supplied from the microcomputer 31 to the formation circuit 33.
The display signal S33 output from the forming circuit 33 is only a display signal indicating an operation state, an enabled function, and the like, and does not include a display signal indicating date and time.

Therefore, on the screen of the LCD panel 24, for example, as shown in FIG. 4C, an image of the subject imaged by the imaging unit 11 is displayed, and at the lower side of the screen, the operation state as a video camera and the like are displayed. Characters and the like indicating valid functions and the like are displayed, and a symbol indicating the remaining amount of the built-in battery is displayed by superimposition at the top of the screen.

That is, when the record button or the play button is pressed during a period of 5 seconds after the operation button 34A is switched from the power-off position to the camera mode position, the display screen up to that time (for example, FIG. 4A) Alternatively, FIG. 4B) is switched to, for example, the screen shown in FIG. 4C.

Thereafter, the process proceeds to step 132, where the operation state corresponding to the pressed operation button of the recording button or the reproduction button is set.

Further, in step 112, when the clock circuit 32 does not normally count the date and time, the process proceeds from step 112 to step 151,
In this step 151, the microcomputer 3
1 supplies a predetermined command and data to the forming circuit 33, and the display signal S33 output from the forming circuit 33 is
This is a display signal of an error message. Therefore, L
On the CD panel 24, an error message indicating that the clock circuit 32 is not properly counting the date and time is displayed for, for example, 5 seconds.

Thereafter, the process proceeds to step 125, so that the display on the LCD panel 24 is changed to, for example, the display of FIG. 4C, and input of the operation button 34 is awaited in step 131.

Turning on the power (in the VTR mode) This is done by pressing the operation button 34A from the power-off position to the VTR.
This is the case where the mode is switched to the mode position. That is, when this switching is performed, the imaging unit 11 and the signal processing circuit 12
Except for the above, the main power supply of the VTR 10 is turned on from off.

Then, the processing of the microcomputer 31 starts from step 101 of the routine 100. Next, in step 102, the switching position of the operation button 34A is determined. In this case, the operation button 34A has been switched to the VTR mode position. , The process proceeds from step 102 to step 161.

Then, in step 161, the switch circuit 21 is connected to the VTR side contact V in reverse to FIG. 1 by a control signal from the microcomputer 31.
Thereafter, the process proceeds to step 162,
When the operation button 34 is operated in a standby state at 62, processing corresponding to the operated button is executed.

Recording During recording, the color video signal S12 is output from the signal processing circuit 12.
At the same time, a data signal S33 is taken out from the formation circuit 33, these signals S12 and D33 are supplied to the switch circuit 13, and the switch circuit 13 is controlled by a control signal from the formation circuit 33. The color video signal S12 and the data signal D33 are extracted at a predetermined timing. Then, the extracted signals S12 and D33 are supplied to the recording circuit 14, and are recorded on the tape 16 by the rotary head 15.

Accordingly, the color video signal S12 of the subject imaged by the imaging unit 11 is recorded on the tape 16, and the date and time measured by the clock circuit 33 are also recorded in the recording area of the signal S12 on the tape 16. Is recorded in another area. That is, the color video signal S12
And the data signal D33 are recorded on the tape 16 so as to be separable during reproduction.

At this time, the color video signal S12 from the signal processing circuit 12 is supplied to the display circuit 23 through the camera-side contact C of the switch circuit 21 and the switch circuit 22. Is displayed. At this time, characters and symbols are displayed by superimposition according to the display signal 33 as described above.

At the time of reproduction, a signal is reproduced from the tape 16 by the head 15, and the reproduced signal is supplied to the reproduction circuit 17 to extract the color video signal S12 and the data signal D33.
The color video signal S12 is supplied to the switch circuit 21.
Is supplied to the display circuit 23 through the VTR side contact V and the switch circuit 22, and a reproduced image is displayed on the LCD panel 24.

The data signal D33 from the reproducing circuit 17
Is supplied to the microcomputer 31 and is used as data for the date and time at the time of recording.

Conclusion In the video camera integrated type VTR 10 shown in FIG.
When the power is turned on, the date and time are displayed for 5 seconds, for example, so that the date and time can be confirmed. Therefore, for example, when the time difference needs to be corrected overseas, an incorrect date and time are not recorded. Moreover, no special key operation is required to display the date and time.

Further, even during the period in which the date and time are displayed, the recording can be started, so that the beginning of the recording is not lost. Furthermore, even if the date and time are displayed in the image, when the recording is started, the date and time are not displayed, so that the date and time are included in the image and are not mistaken for being recorded.

In the above description, the date and time are displayed only when the power is turned on. However, if the routine 100 is configured as shown in FIG. 5, for example, the date and time can be displayed even in the standby state. it can. That is, when the operation button 34 is pressed while waiting for input in step 131, it is determined in step 171 whether or not a button for displaying date and time is pressed, and a button for displaying date and time is determined. If not, the process proceeds from step 171 to step 132,
In the case of a button for displaying the date and time, the process may return from step 171 to step 112.

In the above description, the color video signal S
12 is recorded on the magnetic tape 16, but the CD-R
The present invention can also be applied to recording on a recording medium such as a DVD or a DVD-ROM.

A list of abbreviations used in this specification A / D: Analog to Digital CCD: Charge Coupled Device CD: Compact Disc CD-R: CD-Recordable CPU: Central Processing Unit D / A: Digital to Analog DV : Digital Viveo DVD-RAM: Digital Versatile Disc-RAM LCD: Liquid Crystal Display NTSC: National Television System Committee RAM: Random Access Memory VTR: Video Tape Recorder

[0061]

According to the present invention, when the power is turned on,
Since a predetermined period, date and time are displayed, the date and time can be confirmed. Moreover,
No special key operation is required to display the date and time.

In addition, since the recording can be started even during the period in which the date and time are displayed, the beginning of the recording is not lost. Furthermore, even if the date and time are displayed in the image, when the recording is started, the date and time are not displayed, so that the date and time are included in the image and are not mistaken for being recorded.

[Brief description of the drawings]

FIG. 1 is a system diagram illustrating one embodiment of the present invention.

FIG. 2 is a flowchart illustrating one embodiment of the present invention.

FIG. 3 is a diagram for explaining the present invention.

FIG. 4 is a diagram showing a display example according to the present invention.

FIG. 5 is a flowchart showing another embodiment of the present invention.

[Explanation of symbols]

10 video recorder integrated VTR, 11 imaging unit, 12
... signal processing circuit, 14 ... recording circuit, 15 ... rotary magnetic head, 16 ... magnetic tape, 17 ... reproduction circuit, 23 ... display circuit, 24 ... display device, 31 ... microcomputer, 32 ... clock circuit, 33 ... signal formation Circuit, 34 ... operation buttons

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/91 H04N 5/91 Z

Claims (5)

[Claims] 1. A recording circuit for recording a video signal on a recording medium, a clock circuit for measuring at least one of current date and time information, an operation means, and a control circuit for controlling display of the information. The control circuit starts displaying the information measured by the clock circuit when power is turned on, and stops displaying the information when a predetermined period has elapsed from the start of the display. Even when the predetermined period has not elapsed from the start of the display, when the operating means is operated, the display of the information is controlled to be stopped, and at the time of recording, the information measured by the clock circuit is read at the time of reproduction. A video signal recording device that records the video signal so that it can be separated from the video signal. 2. The video signal recording device according to claim 1, wherein the operation of the operation means is a recording operation. 3. The video signal recording device according to claim 2, further comprising a display device, wherein the video signal and the information are displayed on the display device. 4. A video signal recording apparatus according to claim 3, wherein said video signal and said information are recorded in another area of said recording medium during recording. 5. The video signal recording apparatus according to claim 4, wherein said recording medium is a magnetic tape, and said video signal and said information are digitally recorded on said magnetic tape. .