JPH04363982A - Recorder - Google Patents

Abstract

PURPOSE:To prevent mistake of image pickup at a still picture in the case of using a strobo. CONSTITUTION:A user uses a selector switch 60 to select the pickup of a moving picture or a still picture. An image pickup mode signal generating circuit 62 uses the selector switch 60 to select the still picture pickup mode and outputs a still picture image pickup mode signal when a strobe device 58 is turned off or when the charging is finished even while the strobo device 58 is set and outputs a moving picture image pickup mode signal when the charging is not finished for the strobo device 58. A changeover switch 44 is thrown to the contact (a) by the moving picture image pickup mode signal and a camera control circuit 56 operates a shutter 24 suitable for the moving picture image pickup. The changeover switch 44 is thrown to a contact (b) by the still picture image pickup mode signal and the camera control circuit 56 operates the shutter 24 suitable for the still picture image pickup.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device capable of recording moving images and still images on a recording medium.

0002

2. Description of the Related Art There is an increasing demand for high density recording in video tape recorders (VTRs). When the tape running speed is slowed down for high-density recording, the relative speed between the fixed head for audio recording and the magnetic tape becomes small, resulting in a problem that the reproduced sound quality deteriorates.

[0003] To solve this problem, a method has been proposed in which the track of the rotary head is made longer and a time-base compressed audio signal is recorded in the extended portion. For example, in a rotating two-head helical scan VTR, the magnetic tape was conventionally wound approximately 180 degrees around the rotating cylinder;
0+θ) degrees, and record the time-axis compressed audio PCM signal in the θ portion. FIG. 2 shows the tape running system, and FIG. 3 shows the track pattern. In Figure 2,
10 is a magnetic tape, 12 is a rotating cylinder, and 14 and 16 are magnetic heads. In FIG. 3, 18 is a video signal recording area, and 19 is an audio PCM signal recording area (shaded area). The video signal recording area 18 is the rotary cylinder 1
2, and the PCM signal recording area 19 is θ
It is a degree.

As described above, a recording method has been proposed in which a track is extended and a PCM signal is recorded in the extended portion, and as an application of this, a recording method has been proposed in which a still image is digitally recorded in the PCM signal recording area 19. There is. To record one still image, it is sufficient to use only a small number of PCM signal recording areas 19. According to this recording method, still images can be recorded on the same recording medium using the same imaging system as for video recording, which is very convenient. Furthermore, it is possible to obtain a still image reproduction signal of higher image quality than the conventional still image output obtained by stopping the magnetic tape and repeatedly reproducing the same track.

[0005]

Generally, in video shooting, a constant lighting device called a video light is sometimes used, but a method of shooting using a strobe device has not been considered.

However, when recording still images with a camera-integrated VTR having a still image recording function as described above, it is convenient to be able to use a strobe device in the same way as a still camera.

[0007] An object of the present invention is to provide a recording device that solves these demands.

[0008]

[Means for Solving the Problems] A recording device according to the present invention is a recording device that is equipped with a still image shooting or moving image shooting selection means and is capable of selectively recording moving images and still images on a tape-shaped recording medium. The present invention is characterized by having a control means that operates in a video shooting mode when the strobe to be used is not fully charged when still image shooting is selected by the selection means, and operates in a still image shooting mode when charging is completed. do.

[0009]

[Operation] According to the above-mentioned means, when attempting to take a still image using a strobe, the camera enters the video shooting mode when the strobe is uncharged, so mistakes in taking a still image can be prevented.

0010

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an embodiment of the present invention. Reference numeral 20 denotes a photographic lens including a focusing lens group 20a, a zooming lens group 20b, and a correction lens group 20c. 22 is the shutter, 24 is the aperture,
26 is an image sensor that converts an optical image into an electrical signal, and 28 is a preamplifier that amplifies the output of the image sensor 26. A focus drive circuit 30 performs focusing by a motor 32.
The zoom drive circuit 34 drives the zooming lens group 20b with the motor 36, the shutter drive circuit 37 opens and closes the shutter 32, and the aperture drive circuit 38 drives the zoom lens group 20b with the motor 36. By driving the blades of the aperture 24, the preamplifier 2
The aperture value is adjusted so that the output level of No. 8 becomes a predetermined value.

42 is a camera signal processing circuit that performs camera signal processing such as gamma correction on the output of the preamplifier 28 and outputs it as a standard format video signal; 44 is connected to the a contact point when recording a video, and the b contact when recording a still image; A video/still image changeover switch connected to the contact, 46 a video recording processing circuit for recording and processing the video signal from the a contact of the switch 44, 48
50 is a rate conversion circuit that converts the output data of the A/D converter 48 into a PCM. This is a PCM conversion circuit that performs modulation.

Reference numeral 54 denotes a recording circuit consisting of a magnetic head, a magnetic tape, and a drive system for these, which outputs the output of the video recording processing circuit 46 to the video recording area 1 of the magnetic tape.
8, and the output of the PCM conversion circuit 52 is recorded in the PCM signal recording area 19.

56 is a camera control circuit that controls the whole;
8 is a strobe device, 60 is a selection switch for selecting video recording or still image recording, and 62 is a selection signal from the selection switch 60 and a strobe device 58, which will be described in detail later.
This is a still image/video shooting mode signal generation circuit that generates a still image shooting mode signal or a moving image shooting mode signal in accordance with a strobe on/off signal and a strobe charge completion signal from a strobe. 64 is a release device that instructs to start and stop photographing (recording). The changeover switch 44 is switched by a photographing mode signal from a still image/moving image mode signal generation circuit 62. Still image/video shooting mode signal generation circuit 62
The photographing mode signal outputted by the camera control circuit 56 is also applied to the camera control circuit 56.

Next, the operation of this embodiment will be explained.

FIG. 4 shows the still image/video mode signal generation circuit 6.
2 shows an operation flowchart of No. 2. Selection of still image/video by the selection switch 60 (S1), turning on/off of the strobe device 58 in the case of still image shooting (S2), and charging completion signal from the strobe device 58 when the strobe device 58 is on. Check whether charging is completed (S3).

When still image photography is selected (S1) and the strobe device 58 is off (S2), a still image photography mode signal is output to the changeover switch 44 and camera control circuit 56 (S5).

When still image shooting is selected (S1), the strobe device 58 is on (S2), and charging is completed (S3), the camera control circuit 56 is instructed to perform strobe shooting (S4), and still image shooting is performed. Switch 44 to change the mode signal
and output to the camera control circuit 56 (S5). If charging is not completed (S3), the camera control circuit 56 is prohibited from operating the shutter 24 (S6), and a video shooting mode signal is output to the changeover switch 44 and the camera control circuit 56 (S7).

When video shooting is selected (S1),
A video shooting mode signal is output to the changeover switch 44 and camera control circuit 56 (S7).

The changeover switch 44 is connected to an a contact in response to a moving image photographing mode signal from the photographing mode signal generating circuit 62, and is connected to a b contact in accordance with a still image photographing mode signal.

FIG. 5 shows an operational flowchart of the camera control circuit 56. When the shooting mode signal from the shooting mode signal generation circuit 62 is a video shooting mode signal (S10)
In response to the operation of the release device 64 (S11), the shutter drive circuit 37 operates the shutter 22 for video shooting (S12). Further, the photographing mode signal generation circuit 56
When the shooting mode signal from is a still image shooting mode signal (S10), in response to the operation of the release device 64 (S1
3) The shutter drive circuit 37 operates the shutter 22 for still image photography (S14). Of course, when using the strobe device 58, the strobe device 58 emits light in synchronization.

Next, the overall basic operation will be explained. In the case of moving image shooting, for example, moving image shooting is selected by the selection switch 60, and the shooting mode signal generation circuit 62 outputs the moving image shooting mode signal as described above. As a result, the changeover switch 44 is connected to the a contact, and the camera control circuit 56 opens and closes the shutter 22 at a predetermined period via the shutter drive circuit 37.

The image sensor 26 converts the optical image taken by the photographing lens 20 into an electrical signal. The output of the image sensor 26 is supplied to a camera signal processing circuit 42 via a preamplifier 28.
The camera signal processing circuit 42 outputs a video signal of the subject. The aperture drive circuit 38 adjusts the opening degree of the aperture 24 via the galvanometer 40 so that the output signal of the preamplifier 28 reaches a predetermined level.

The output of the camera signal processing circuit 42 is applied to a video recording processing circuit 46 via a switch 44. The video recording processing circuit 46 records the video signal output from the camera signal processing circuit 42 and applies it to the recording circuit 54 . The recording circuit 54 records the output of the video signal processing circuit 46 in the video recording area 18 of the magnetic tape.

Next, the still image recording operation will be explained. It is assumed that still image shooting is selected by the selection switch 60, and the strobe device 58 is turned on and charging is completed. The photographing mode signal generation circuit 62 outputs a still image photographing mode signal, as explained in FIG. As a result, the switch 26 connects to the b contact, and the camera control circuit 56 connects the still image shutter.
mode and activates the strobe device 58 if necessary.

The camera control circuit 56 sends a control signal to the camera signal processing circuit 42 in response to a release signal from the release device 64, and the camera signal processing circuit 42 responds to the control signal to control the image captured by the image pickup device 26. outputs one field (or frame) of video signal.

The output of the camera signal processing circuit 42 is applied to an A/D converter 48 via a switch 44 and digitized. The rate conversion circuit 50 rate converts the output data of the A/D converter 48 and supplies it to the PCM conversion circuit 52, which performs PCM modulation. Recording circuit 54
records the output of the PCM conversion circuit 52 in the PCM signal recording area 19 of the magnetic tape.

In the above embodiment, the strobe device 58 is always used when taking still images, but of course, in a situation where sufficient brightness can be obtained for still image shooting without strobe light, the strobe device 58 is used. It is clear that there is no need for the 58 to emit synchronized light. It goes without saying that the strobe device 58 may be of a built-in type or an external type.

[0029]

As can be easily understood from the above description, according to the present invention, it is possible to prevent photographing errors when photographing still images using a strobe light.

[Brief explanation of drawings]

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

FIG. 2 is a plan view of the tape running system.

FIG. 3 is a track pattern of the magnetic tape 10.

FIG. 4 is an operation flowchart of the mode signal generation circuit 62.

FIG. 5 is an operation flowchart of the camera control circuit 56.

[Explanation of symbols]

10: Magnetic tape 12: Rotating cylinder 14,1
6: Magnetic head 18: Video signal recording area 19:
PCM signal recording area 20: Photographing lens 20a:
Focusing lens group 20b: Zooming lens group 20c: Correction lens group 22: Shutter 2
4: Aperture 26: Image sensor 28: Preamplifier
30: Focus drive circuit 32: Motor 34:
Zoom drive circuit 36: Motor 37: Shutter drive circuit 38: Aperture drive circuit 40: Galvanometer 42: Camera signal processing circuit 44: Video/still image selection switch 46: Video recording processing circuit 48: A
/D converter 50: Rate conversion circuit 52: PCM
Conversion circuit 54: Recording circuit 56: Camera control circuit 58: Strobe device 60: Selection switch 6
2: Still image/video shooting mode signal generation circuit 64: Release device

Claims (1)

[Claims] 1. A recording device comprising a still image shooting or video shooting selection means and capable of selectively recording moving images and still images on a tape-shaped recording medium, wherein the selection means selects still image shooting. A recording device characterized in that it has a control means that sometimes operates in a video shooting mode when a strobe to be used is not fully charged, and operates in a still image shooting mode when charging is completed.