JP2699380B2 - Video camera, video tape recorder and video system device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera, a camera-integrated video tape recorder, a microphone for a video camera for inputting sound from a remote position to the video camera, and a video system device thereof. Things.

2. Description of the Related Art In recent years, video cameras or video tape recorders with a built-in camera (hereinafter, referred to as video camera devices) have become very popular.

In such a video camera device, when sound is recorded together with an image of a subject, it is most common to input a sound signal picked up by a microphone provided integrally with the device body. In this example, it is difficult to record a sufficiently clear voice when inputting the voice of a subject at a position distant from the apparatus main body, particularly when the subject is a person and wants to record his / her voice. Therefore, as an audio input device in such a case, a wired microphone having an extension cord or a wireless microphone using radio waves of a predetermined frequency has been used to output the sound from a subject located away from the video camera device body. The input is made as high sensitivity and clear voice.

However, in the conventional device as described above, in the case of a wired microphone, the extension cord is an obstacle, and not only the microphone but also the cord is reflected on the image, and the appearance is poor. There was also a problem that the distance from the video camera device body was limited because the length could not be too long. On the other hand, in the case of wireless microphones, the problem of radio interference has recently been raised.

Therefore, in view of these conventional problems, the present invention requires a cord for connecting the microphone and the video camera device main body, particularly when inputting voice of the subject itself at a position distant from the video camera device main body. A video camera that can be input with high sensitivity without having to worry about the length of the distance, and without the problem of radio interference like a conventional wireless microphone,
It is an object of the present invention to provide a video tape recorder, a microphone, and a system device thereof.

Means for Solving the Problems In order to achieve the above object, a video camera of the present invention is provided in a system for guiding an image of a copy body through a lens to an image sensor, and is incident through the lens together with the image of the subject. An infrared reflection member for extracting infrared light modulated by an audio signal in the range of the subject, a photoelectric conversion element for receiving the infrared light extracted by the infrared reflection member, and an audio signal from an electric signal from the photoelectric conversion element. And demodulating means for demodulating the audio signal, and switching means for switching between the audio signal from the demodulating means and the audio signal from the sound collecting means provided in the apparatus main body.

Further, the video tape recorder of the present invention includes the video camera described above and recording means for recording, on a magnetic tape, an audio signal selected by a switching means constituting the video camera together with a video signal captured by an image sensor. It is characterized by comprising a combination.

Further, the video system apparatus of the present invention includes a transmitting device provided with a microphone element, a light emitting unit that converts an audio signal collected by the microphone element into an optical signal and emits light, and a video signal emitted from the transmitting device. Photoelectric conversion means for receiving the optical signal through a lens provided in the front part of the video camera device main body, demodulation means for extracting an audio signal from the electric signal from the photoelectric conversion means, and the audio signal And a magnetic recording means for recording the image data together with the imaged video signal.

Operation The present invention has the following operation with the above-described configuration.

In the video camera according to the first aspect, infrared light modulated by an audio signal from a light emitting unit mounted on a subject, for example, a person's chest, enters along with the image of the subject through a lens, and infrared light modulated by the audio signal in the apparatus body. It is separated from the video system by an infrared reflecting member and taken out. And
The separated and extracted infrared light is converted into an electric signal by the photoelectric conversion element, and is demodulated by the demodulation means into the original audio signal. Therefore, the audio signal can be transmitted wirelessly, and the transmission of the audio signal using infrared light has the advantage that there is no problem of radio wave interference. In order to have a switching means for switching between the sound signal from the sound pickup means provided in the main body,
The echo effect caused by the simultaneous input of the audio signal using the infrared light and the audio signal from the sound collecting means can be prohibited.

The video tape recorder according to claim 2 records either one of the audio signal using the infrared light selected by the switching means and the audio signal from the sound collecting means, so that the vicinity of the subject according to the use state of the video camera is recorded. Can be recorded.

The video system apparatus according to claim 3 emits an audio signal picked up by a microphone element from an optical transmitter, converts the signal into an electric signal by photoelectric conversion means provided in a video camera apparatus main body, and converts the electric signal to demodulation means. Demodulated to an audio signal, and the demodulated audio signal can be used as a recording signal, so that the audio signal can be transmitted wirelessly without being greatly affected by the range of the subject, and the transmission of the audio signal using light is possible. Therefore, there is no problem of radio interference.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the outline of a first embodiment of a video system apparatus according to the present invention, and FIG. 1 and 2, reference numeral 1 denotes a video camera apparatus main body, and in this example, a camera-integrated video tape recorder is shown. Reference numeral 2 denotes a voice transmitting device as a microphone that collects and transmits the voice of the person as the subject 3, and a microphone element 4 that inputs a voice signal, and optically modulates the voice signal input from the microphone element 4. A light emitting means 5 for emitting a light signal by infrared light 6 is provided, and the voice transmitting device 2 is used by being attached to the chest of the subject 3 or the like (see FIG. 2).

The infrared light 6 from the voice transmitting device 2 is transmitted along with the video of the subject 3 and the objective lens 7 of the video camera device main body 1.
After passing through various lenses (not shown)
It reaches the imaging lens 8. Here, the image of subject 3 is a CCD
The light is guided to the image sensor 9 to form an image. The infrared light 6 is reflected by a reflection mirror 10 composed of an infrared cut filter provided in front of the image pickup device 9, and the image light from which the infrared light 6 has been cut enters the CCD image pickup device 9. The reflected infrared light 6 ′ passes through the convex lens 11 and irradiates a photoelectric conversion element 12 such as a phototransistor. Reference numeral 13 denotes demodulation means for demodulating an original audio signal from the electric signal converted by the photoelectric conversion element 12, and the audio signal is transmitted to an audio signal processing means 15 including an audio signal amplifier via a switching means 14. Supplied. Here, the switching means 14 is the video camera apparatus main body 1.
Audio signal input by a microphone 16 provided integrally with the
The switching is made between the voice signal input from the voice transmitting device 2 and the voice signal demodulated by the demodulation means 13, and can be appropriately switched from outside the video camera device body 1. The switching between the two audio signal inputs is necessary to prevent mutual interference caused by the input shift and the difference in the strength when the microphone and the microphone 16 of the audio transmission device 2 are simultaneously input.

Reference numeral 17 denotes a recording unit which converts an audio signal output from the audio signal processing unit 15 and a video signal obtained through a video signal processing unit 18 including an amplifier into a video image formed on the image sensor 9. It is recorded on a magnetic tape.

In the above-described configuration, when it is desired to collect and record the sound together with the video of the subject 3 by the microphone element 4, the switching means 14 is switched to the terminal a side, and as shown in FIG. 1 is mounted so that the voice transmitting device 2 is located in front of the subject 3. Then, when the image is taken by the video camera device main body 1, even when zooming up, if the voice transmitting device 2 always takes an image of the subject 3 so as to be within the imaging range,
The infrared rays 6 from the light emitting means 5 are always irradiated on the photoelectric conversion element 12 through the objective lens 7. Then, the audio signal of the subject 3 can be input to the recording means 17 through the demodulating means 13, the switching means 14, and the audio signal processing means 15.

In the first embodiment, the voice of the subject can be wirelessly input, and of course, the voice of the subject is input through the objective lens together with the subject. Therefore, even if the subject is slightly away, the voice can be enlarged by zooming up. Also, the voice transmitting device itself is enlarged, so that even if the luminance of light emitted by the light emitting means is low, the transmitted voice can be reliably captured.

Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 3, the infrared ray 6 is emitted by turning on the switch 19 of the light emitting means 5 of the voice transmitting device 2, and a constant carrier signal is transmitted without a voice input from the microphone element 4. . Then, on the video camera apparatus main body 1 side, the infrared light extracted by the reflection mirror 10 and passed through the lens 11 is received, and when the carrier signal is detected by the light receiving element 12, the carrier signal is input to the control means 20, By this signal, the control means 20 automatically switches the switching means 14 'to the terminal a side. At this time, the switching means 14 ′ is desired to be an electronic switching means using a transistor or the like, but it does not refuse to constitute other switching means.

FIG. 4 shows still another embodiment of the present invention, in which the infrared light 6 from the light emitting means 5 of the voice transmitting device 2 is not passed through the objective lens 7 but at an appropriate position in front of the video camera device main body 1. The structure is such that the light is guided to the photoelectric conversion element 12 through the provided infrared pass filter 21 and the convex lens 22. In this case, even when the voice transmitting device 2 is out of the imaging range of the subject 3, if the infrared light 6 is emitted toward the video camera device main body 1, the voice can be transmitted. it can. Therefore, the present example is more convenient when the voice transmitting device 2 is out of the imaging range due to zooming-in too much during the shooting, or when a large number of subjects 3 want to input the voice of a person outside the imaging range. It is.

Effect of the Invention According to the present invention, an audio signal picked up by a microphone is transmitted to a video camera apparatus main body side by infrared light and voice input is performed. Therefore, voice input is required as in a conventional wired microphone. Problems such as the restriction of the distance of the subject from the video camera device main body and the obstruction of the cord are eliminated, and the problem of radio interference is also eliminated.

In addition, since the infrared light modulated by the audio signal is emitted in the range of the subject, and the infrared light is input to the video camera device body through the objective lens together with the image, the subject is emitted from the video camera device body to the light emitting means. Even at a distance, even if the light emission intensity is weak, the light emission can be reliably captured by zooming up.

Also, by providing switching means for switching between the audio signal from the demodulation means and the audio signal from the sound collection means provided in the apparatus main body, the audio signal using infrared light and the audio signal from the sound collection means are simultaneously input. It is possible to prohibit the echo effect caused by the above.

Also, by receiving infrared light via a lens separately provided in the front of the video camera apparatus main body instead of the objective lens, it is possible to input a sound signal from a subject outside the imaging range. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a video system apparatus according to the present invention, FIG.
FIG. 4 is a block diagram showing another embodiment. 1 ... video camera device main body, 2 ... voice transmitting device, 3
... Subject, 4... Microphone, 5...
... infrared light, 7 ... objective lens, 8 ... imaging lens,
9 imaging device, 10 infrared reflection mirror, 12 photoelectric conversion device, 13 demodulation means, 14 switching means,
17 recording means, 22 convex lens, 21 infrared-pass filter.

Claims (3)

(57) [Claims] An infrared reflecting member is provided in a system for guiding an image of a copy body to an image sensor through a lens, and extracts infrared light modulated by a sound signal collected in the imaging range of the subject. A photoelectric conversion element for receiving the infrared light extracted by the member, a demodulating means for demodulating an audio signal from an electric signal from the photoelectric conversion element, and a sound signal from the demodulating means and a sound collecting means provided on the apparatus body. Switching means for switching between the audio signal and the video signal. 2. A video camera according to claim 1, further comprising recording means for recording an audio signal selected by said switching means on a magnetic tape together with a video signal picked up by an image pickup device. Video tape recorder. 3. A transmitting device comprising: a microphone element; a light emitting means for converting an audio signal collected by the microphone element into an optical signal and emitting light; and transmitting a light signal emitted from the transmitting device to a video signal. A photoelectric conversion unit that receives light through a lens provided at a front part of the camera device main body, a demodulation unit that demodulates an audio signal from an electric signal from the photoelectric conversion element, and an audio signal from the demodulation unit and the device main body. Switching means for switching an audio signal from the sound pickup means provided; and recording means for recording the audio signal selected by the switching means on a magnetic tape together with a video signal imaged by an image sensor. Video system equipment.