JPS5868281A - Photographing and video recording device - Google Patents

Abstract

PURPOSE:To eliminate the need for the cable of a television camera and to reduce restriction to transfer, by providing the television camra device with a high frequency signal generation part, transmitting a radio wave through modulation which uses a video signal and a magnetic video recording playback control signal, and receiving and demodulating the radio wave. CONSTITUTION:In addition to a television camera part 3, a television camera device 1 is provided with a magnetic video recording reproducing device control signal generating circuit 4 and a transmitter 5, and a radio wave modulated by the video signal of a camera part 3 and the control signal of the control signal generating cirlcuit 4 is transmitted from an antenna 6. This radio wave is received by a receiver 7 through an antenna 8 and demodulated by a demodulating circuit 9; and its demodulation output is separated into a video signal 10 and a control signal 12, which are amplified and inputted to a VTR part 11. Thus, the need for a camera cable is eliminated to eliminate limitations to the movement range of the camera, improving the mobility of video recording.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for recording video signals obtained by photographing with a television camera onto a magnetic recording/playback device such as a tape recorder, and relates to a wireless connection between the television camera and the magnetic recording/playback device. This makes it easier to move the television camera and expands its range of movement, thereby providing a device with wide range of mobility and good operability.

Conventionally, when recording video signals obtained by shooting with a television camera on a magnetic recording/reproducing device (hereinafter referred to as a VTR),
A cable was used to connect the two, with one operator and transporter following each of the seven. For this reason, the movement of the television camera is significantly obstructed by the coupling cable, and its range of movement is still limited, making it impossible to take pictures with good mobility. Furthermore, because different people need to perform the operations on each side, the operability is poor, and operational errors often occur.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an apparatus that eliminates such conventional drawbacks.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to drawings showing embodiments thereof.

FIG. 1 shows the first embodiment, where 1 is a television camera device and 2 is a magnetic recording/reproducing device (VTR). The television camera device 1 includes a television camera section 3 that photographs a subject and obtains a video signal, and a control signal generation circuit 4 that generates a control signal for controlling the VTR.
A transmitter 5 is provided, and the transmitter 5 modulates a high frequency signal using the video signal and the control signal and transmits it from an antenna 6. On the other hand, the VTR 2 is equipped with a receiver 7, which receives a high frequency signal transmitted from the antenna 6 of the television camera section 1 with an antenna 8, selects and amplifies it with a receiver, and demodulates it with a demodulation circuit 9. Further, only the video signal is taken out by the video signal amplification circuit 10 and applied to the signal input terminal of the VTR section 11 which is the main body. Also, the control signal processing circuit 12 generates the control signal 10.
2, and detects what kind of control is requested by the control signal 2. Based on the detected output, the operation of the VTR section 11 is set to a stopped state, a recording state, a pause state, a playback state, etc. control.

FIG. 2 shows a second embodiment of the present invention, whereas in the first embodiment described above, the part for transmitting and receiving video signals and control signals is integrated into the television camera device 1 and the VTR 2. On the other hand, the television camera section and the VTR section are left as they are, and a transmitting and receiving section is added thereto as a transmitting adapter 13 and a receiving adapter 14.

Since it is basically the same as that of the first embodiment, the explanation will be omitted.

Next, FIG. 3 shows a specific example of a circuit of the transmitter 5, in which a composite video signal in the band of 0 to 4 MHz from the television camera unit 3 and a pulse code modulated signal from the control signal generation circuit 4 are transmitted. A control signal of approximately 5 MHz is amplified by a buffer and an amplifier 17.18 each composed of emitter follower-connected transistors 15.18, and then combined, and both are applied to the transistor 2o of the oscillation modulation circuit 19.

This circuit 19 uses a coil 21 and capacitors 22 to 24 to constitute a high frequency automatic oscillation circuit of approximately 500 kJIHz, and its oscillation frequency is set to F by a composite signal of a video signal and a control signal applied to the base of a transistor 2o.
M modulates. The FM modulated high frequency signal is transmitted through transistor 2.
5 is amplified by the buffer amplifier 26 and then the antenna 6
and send it out. Of course, the strength of the transmitted high-frequency signal must be within the standards stipulated by law.

On the other hand, FIG. 4 shows a specific example of the circuit of the receiver 7. The high frequency signal received by the antenna 8 is first amplified by a high frequency amplification circuit 28 using a field effect transistor 27 and applied to the base of a transistor 3o of a frequency conversion circuit 29. Also, the transistor 31, the coil 32, and the capacitor 3
The oscillation output from the local oscillation circuit 34 of 3 is also applied to the transistor 3o to convert the received signal into an intermediate frequency signal.

Further, the intermediate frequency signal is outputted through a filter 35, amplified by an intermediate frequency amplification circuit 36, and then input to a demodulation circuit 9 constituted by an FM detection circuit for demodulation. In the video signal amplifying circuit 1o, only the composite video signal in the 0-4 MHz range) is taken out by a low-pass filter and applied to the VTR section 10. The control signal processing circuit 12 extracts only the control signal using a band pass filter centered on es 1vf (z), further detects the signal, identifies the pulse code, etc., and controls the operation of the VTR section 11.

As described above, according to the device of the present invention, the television camera device is provided with a transmitter for a video signal and a control signal for VTR control, and
By installing a receiver for the transmitted signal in the TR, the video signal captured by the TV camera can be transmitted to the VT without using a coupling cable.
Since the RK input is input and the operating status of the VTR is controlled, the TV camera can be freely carried around and photographed while leaving the VTR in any location, limiting the range of movement. This allows you to shoot freely and with great mobility. Moreover, the operating status of the VTR can be controlled arbitrarily from the TV camera side without using a coupling cable, and there is no need to place an operator on the VTR side. It will never occur.

[Brief explanation of drawings]

FIGS. 1 and 2 are block diagrams of a photographing and recording apparatus according to an embodiment of the present invention, and FIGS. 3 and 4 are specific circuit diagrams of essential parts thereof. 1...Television camera device-S2...Magnetic recording and reproducing device (VTR), 3...Television camera section, taste

Claims (1)

[Claims] The television camera device is provided with a transmitter that modulates and transmits a high frequency signal using a video signal obtained by photographing with the television camera and a control signal for controlling the magnetic recording and reproducing device, and the transmitter modulates and transmits the high frequency signal to the magnetic recording and reproducing device. a receiver for receiving the received signal and reproducing the video signal and the control signal; and applying the received video signal to the magnetic recording and reproducing device; controlling the operation of the Ichimoku magnetic recording and reproducing device using the received control signal; A photographing and recording device characterized in that: