JPS63131783A - Video camera with still camera - Google Patents

Abstract

PURPOSE:To eliminate the unpleasant sound at the time of reproducing a magnetic tape by interlocking to the winding of a film, muting temporality a sound input signal with a sound control circuit and decreasing a volume. CONSTITUTION:When the automatic winding of a film occurs during the photographing of a video camera, immediately before the automatic winding of the film, the sound input signal from a microphone 13 makes a sound control circuit mute temporarily, decrease the volume, and a video signal only is mainly sent to a magnetic recording device part 3 and stored in a magnetic tape 22. Thus, the recording to the magnetic tape 22 of the unpleasant sound of a driving sound and an oscillating sound can be prevented by a film winding means.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a video camera with a still camera that integrates a so-called still camera using a silver halide film and a video camera using a magnetic tape.

[Summary of the Invention] The present invention relates to a motor for a film winding means in a video camera with a still camera, which receives input from a microphone during automatic film winding during simultaneous shooting of the video camera and still camera.

Temporarily mutes or reduces the volume of audio signals such as drive sounds and vibration sounds caused by gears, etc., and sends only signals mainly consisting of video signals to the magnetic recording device section while the film is being wound to record the magnetic tape. By storing the information, it is possible to prevent unpleasant noises such as the driving sound when winding the film during shooting with the video camera from being recorded on the magnetic tape, and it is possible to eliminate unpleasant sounds when playing back the magnetic tape. It was I who made it possible.

[Prior Art] In recent years, a video camera with a still camera has been developed that integrally combines a video camera that records video and audio signals on magnetic tape with a still camera that takes pictures using silver halide film. . This video camera with still camera has a microphone for inputting audio, an RFC (record) button for instructing to start video shooting, etc., at a predetermined position on the main body, as well as a shirt button for instructing to start photo shooting. Some cameras are equipped with a manual rotary lever that winds the film after taking a photo, and by turning on the RFC button and shutter button, it is possible to simultaneously shoot with a video camera and a still camera. .

However, if the user operates the rotary lever with one hand to wind the film while shooting with the video camera,
It has been pointed out that the camera shake of the other hand holding the main body of the video camera is unavoidable, which has an adverse effect on video shooting.

To deal with this, a motor is provided that automatically winds the film in conjunction with the ON operation of the shirt button.

A video camera with a still camera has been developed that has a film winding means (mechanism) consisting of gears and the like.

[Problems to be Solved by the Invention] However, when the film is automatically wound up by the film winding means, driving sounds and vibration sounds from the motor, gears, etc. of the film winding means are inputted from the microphone and caused by the magnetic field. The drawback is that it is recorded on tape.
It has been pointed out that there is a problem in which this driving sound or the like becomes an unpleasant sound when playing back the magnetic tape.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a video camera with a still camera that can prevent unpleasant sounds such as driving sounds caused by a film winding means generated when winding a film during video shooting from being recorded on a magnetic tape.

[Means for Solving the Problems] A video camera with a still camera according to the present invention includes a magnetic recording device section for recording a video signal and an audio signal in a superimposed manner on a magnetic tape, and a magnetic recording device attached to the magnetic recording device section that records video signals and audio signals in a superimposed manner on a magnetic tape. a microphone for supplying audio signals to the magnetic recording device section; a still image camera section attached to the magnetic recording device section for taking an optical image of a subject on a film; It consists of a film winding means that automatically winds up a fixed amount at a time, and an audio control circuit interposed between the magnetic recording device section and the microphone, and the audio control circuit operates in conjunction with the winding of the film to input audio. This is done by temporarily muting the signal or reducing its volume.

[Function] When automatic film winding occurs during shooting with a video camera, the audio input signal from the microphone or audio control is reduced immediately before the automatic film winding, and only the video signal is sent to the magnetic recording device section. It is sent out and stored on magnetic tape. This prevents unpleasant sounds such as driving sounds and vibration sounds caused by the film winding means from being recorded on the magnetic tape.

[Example] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a main body 2 of a video camera with still camera 1 includes a magnetic recording device section 3 and a still image camera section 4.

The optical system A of the magnetic recording device section 3 includes a C0D (charge-coupled device) 6 that converts an optical image of a subject captured by a master lens 5 attached to the front surface of the main body 2 from an optical signal to a video signal. It is arranged.

This video signal should be sent to the brightness signal system circuit.

As shown in the block diagram of FIG. 1, this luminance signal system circuit includes an amplifier 7 that amplifies the luminance signal in the video signal, a pre-emphasis circuit 8, a clamp circuit 9, and converts the luminance signal into a recording signal. It is comprised of an HPF (high pass filter) 11 that removes a frequency band of an audio signal to be converted, which will be described later, and a mixer 12 that multiplexes the audio signal. still,
brienfance circuit 8. The clamp circuit 9 is used in a recording circuit of a well-known video tape recorder.

Further, a microphone 13 is attached to the outside of the main body 2. The voice captured by the microphone 13 is converted into an audio signal by the microphone capsule 14. This audio signal is sent to an audio signal recording circuit.

As shown in the block diagram of FIG. 1, this audio signal recording system circuit includes an amplifier 15 that amplifies the audio signal, a muting switch 16, and an input level of the audio signal that does not reach a predetermined value. an AGC circuit 17 that automatically adjusts this when the
M modulator 18 and a BPF (
(bandpass filter) 19.

These recording signals of video and audio signals are sent from the mixer 12 via the recording amplifier 20 to magnetic heads 21a and 21b having different azimuth angles, and are recorded on the magnetic tape 22 by these magnetic heads 21a and 21b. It has become so. The magnetic tape 22 is held between a capstan 24 driven by a tape drive circuit 23 and a pinch roller 25, and is run in a predetermined direction.

The video camera system controller 26 sends a predetermined control command signal to the tape drive circuit 23, and this control signal signal is converted into a command signal from an RFC (record) button 27 attached to the rear surface of the main body 2. It is designed to be issued based on

The optical system B of the still image camera section 4 is provided with a half mirror 29 that bisects the optical path of the subject captured by the master lens 28 attached to the front surface of the main body 2. One optical path system (straight optical path system) divided into two by this half mirror 29 is provided with a focal plane shutter 30.
The roll film 31 is stored therein. The other optical path system divided into two by the half mirror 29 includes a total reflection mirror 32. Lens 33. A viewfinder 35 is placed through a reticle plate 34. Note that an iris 36 is interposed between the master lens 28 and the half mirror 29 in the optical path system of the subject.

The winding-side spool 37 and the sprocket 38 that wrap one end of the roll film 31 are rotated in a predetermined direction by a drive motor and gears (none of which are shown) of a film winding drive circuit 39. The roll film 31 is automatically wound up by a certain amount.

These spool 37, sprocket 38, and drive circuit 39 constitute a film winding means. Further, the focal brain shutter 30 and the iris 36 are driven by a shutter drive circuit 40.

The still camera system controller 41 includes the film winding circuit 39. Shutter drive circuit 40
This control command signal is transmitted to the shirt button 4 attached to the rear surface of the main body 2.
It is designed to be issued based on a command signal from 2.

Further, the still camera system controller 41 turns on the muting switch 16.

It is designed to send an OFF control command signal. That is, this still camera system controller 41 is as follows:
The film 31 of the film winding drive circuit 39
When winding up, the muting switch 1
6, and based on this control command, the muting switch 16 is switched from the ON state to the OFF state, so that the external audio signal input from the microphone 13 can be temporarily muted. It has become.

According to the video camera with still camera l of the above embodiment,
When the RFC button 27 is turned on, the video camera system controller 26 sends a predetermined control command signal to the tape drive circuit 23, and the video signal of the CCD 6 and the audio signal of the microphone capsule 14 of the microphone 13 are transmitted to the FM modulator 10. .18 etc., and are converted into recording signals and recorded on the magnetic tape 22.

If you turn on the shirt button 42 while shooting the above video,
The still camera system controller 41 first sends a predetermined control command signal to the shutter drive circuit 40 to drive the shutter 30 as shown in FIG. Simultaneously with the completion of driving the shutter 30, the muting switch 16 is switched from the ON state to the OFF state by a control command signal from the still camera system controller 41, and the audio signal input from the microphone 13 is muted, and the AGC Only the recording signal of the video signal is stored on the magnetic tape 22 without being sent to the circuit 17 side. Finally, the still camera system controller 41 sends a control command signal to the film winding drive circuit 39, and as shown in FIG.
Since the output time of the motor drive of the film winding drive circuit 39 is shorter than the muting time of the muting switch 16, unpleasant noises such as driving sounds and vibrations caused by the motor, gears, etc. of the film winding drive circuit 39 during film winding are generated. It is not recorded on the magnetic tape 22. As a result, when the magnetic tape 22 is reproduced, unpleasant sounds such as the drive sound when winding the film are not reproduced, and no discomfort is caused.

FIG. 2 shows another embodiment. The video camera l with still camera of this embodiment is not provided with the muting switch 16, and the still camera system controller 41 is connected to the AGC circuit 17A. Then, when winding the film 31, the gain of the amplifier of this AGC circuit 17A is reduced, and the drive sound of the motor, gears, etc. of the film winding means is inputted from the microphone 13.

Reduces the volume of vibration sound. As a result, although there is some sound dropout when playing the magnetic tape 22, the discomfort can be significantly reduced.

[Effects of the Invention] As described above, according to the present invention, when the film is automatically wound during simultaneous shooting with a video camera and a still camera, the drive sound generated by the motor, gears, etc. of the film winding means is inputted from the microphone.

By blocking vibration noise and transmitting only signals mainly consisting of video signals to the magnetic recording device unit and storing them on the magnetic tape while the film is being wound, it is possible to reduce the noise when the film is being wound while the video camera is shooting. It is possible to prevent unpleasant sounds such as the driving sound from being recorded on the magnetic tape. As a result, it is possible to eliminate unpleasant noises during magnetic tape reproduction.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a video camera with a still camera according to an embodiment of the present invention, FIG. 2 is a schematic diagram of another embodiment, and FIG. 3 is a shutter 1 motor drive. FIG. 3 is a signal waveform diagram schematically showing the output of a muting switch or an AGC circuit. l...Video camera with still camera, 3...Magnetic recording operation, 4...Still image camera section, 13...Microphone, 22...Magnetic tape, 31...Film.

Claims (1)

[Scope of Claims] A magnetic recording device unit that records a video signal and an audio signal in a superimposed manner on a magnetic tape; a microphone that is attached to the magnetic recording device unit and supplies the audio signal to the magnetic recording device unit; a still image camera section that is attached to the magnetic recording device section and captures an optical image of a subject on a film; a film winding means that is attached to the still image camera section and automatically winds the film by a predetermined amount; and the magnetic recording device. It consists of an audio control circuit interposed between the recording device section and the microphone, and the audio control circuit is configured to temporarily mute or reduce the volume of the audio input signal in conjunction with the winding of the film. A video camera with a still camera.