JPH02284581A - Video camera device - Google Patents

Abstract

PURPOSE:To reduce the noise level determined by the characteristic of its own coaxial cable and the noise generated in a modulating/demodulating circuit by controlling switches provided on the side of a camera control unit CCU by an on/off control signal of a microphone of a head set provided on the side of a camera head unit CHU. CONSTITUTION:First switches 24a' and 24b' provided on the side of a CCU 9 are controlled by the disconnecting operation of switches 44a and 44b of a microphone switching control means of a head set 5 on the side of a CHU 1. Control data passes switches 44a and 44b and is converted from parallel data to serial data by parallel-serial converting circuits 45a and 45b and passes a coaxial cable 7 and is converted from serial data to parallel data by serial- parallel converting circuits 46a and 46b on the side of the CCU 9, and contacts (a) of first switches 24a' and 24b' are switched to fixed contacts (b) to set a talk system to the turning off state. In such a state, noise components of the coaxial cable 7 and those generated in modulating/demodulating circuits 26a, 26b, 27a, and 27b do not reach a sound emitting means of a head set 13 of a producer or an engineer on the studio side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video camera device suitable for use in mutual communication between a camera head unit and a camera control unit.

[Summary of the invention]

The present invention relates to a video camera device suitable for mutual communication between a camera head unit and a camera control unit. In a video camera apparatus having a camera control unit connected through the camera control unit and controlling the camera head unit, and a microphone whose output signal is transmitted to the camera control unit through a cable, the microphone output signal transmitted to the camera control unit The camera control unit is equipped with a switch means for selectively outputting the signal to the outside of the camera control unit, and the camera head unit is equipped with a control means for controlling the switch means, thereby reducing noise from the camera head unit side when the switch means is "off". This was made so that it could be reduced.

A second aspect of the present invention is a camera head unit equipped with an imaging means, a camera control unit connected to the camera head unit via a cable and controlling the camera head unit, and a camera control unit connected to the camera head unit via a cable. In a video camera apparatus having a sound emitting means for converting a transmitted audio signal into a sound wave, the sound emitting means selectively transmits first and second audio signals supplied from the outside to a camera control unit via a cable. The camera control unit is equipped with a selection switch for supplying a signal to the camera head unit, and the camera head unit is equipped with a control means for controlling the selection switch, so that the two thread paths can be used independently.

[Conventional technology]

Traditionally, video camera equipment for studios or broadcast vans is
It was configured as shown in the figure. In Fig. 3, (1) is a camera head unit (hereinafter referred to as CHU), which has a CCD
The main body of the video camera is composed of a solid-state imaging device such as the above, a head amplifier, a lens (4) of an imaging optical system, and the like. Furthermore, this CHU (1) is equipped with a viewfinder (2), a microphone (3) that collects sound during imaging, and a headphone and microphone that the camera operator (6) wears on his head to communicate with the studio. a headset (5) containing the headset (5);

Video signals (8) such as a luminance signal Y (8a) and a color difference signal U/V (8b) are outputted from the output of such a CHU (1), and are sent to a studio or the like via a coaxial cable (7). The information is transmitted to a camera control unit (hereinafter referred to as CCU) (9) provided on the relay vehicle (10) side.

A video signal [8] captured by such a video camera is, for example, FM modulated and transmitted via a coaxial cable (7). The CCU (9) creates data for control and adjustment. The studio or relay vehicle (10) has a control panel (11) for video-related signal processing, an audio mixing console (12) for mixing audio signals, etc., and a video and audio-related mixer (14). ) etc. adjust the image signal and sound collection signal of the CHU (1) from the monitor receiver (17) and audio level meter, etc., and the video signal (15) and audio signal (16) are adjusted by the monitor receiver (17), audio level meter, etc. It is broadcast as a John signal.

The coaxial cable (7) connecting the above CHU (1) and CCU (9) carries the luminance signal (8a) of the video signal (8).
, color difference signal (8b), data (19), return video signal (22), first microphone signal (2OL>), second microphone signal (20R), ink cam as shown in the allocation in FIG. The signal (21) and the power supply voltage (18) such as AC 240v are transmitted.Here, the return video signal (22) is the image signal captured on the CHU (1) side and is transmitted to the CCU (9) through the L control panel ( 11), the image adjusted and received by the monitor receiver (17) is transferred again to the viewfinder [2] on the CHU (1) side.
This is a video signal transmitted from the CCU (9) side to the CHU (1) side via the coaxial cable (7), as shown in .

In addition, the DC or AC power supply voltage used in the CHU (1) side circuit, such as AC240V (18), and the left and right audio signals collected from the microphone (3) are output to the first and second microphone output signals (2OL ) (2OR). The ink cam signal (21) is CHU (1
) is used for technical communication or communication during program creation between the camera operator (6) who operates the video or audio mixer (14), and data (19) is transmitted from the CCU (9) side to the CHU (1). This is control data for performing side white balance adjustment, automatic aperture control, etc., and these signals are frequency division multiplexed to enable bidirectional transmission.

FIG. 5 is a system diagram showing a conventional system on the talk side of the ink cam signal (21) as described above. In the figure, a plurality of camera devices, namely CHU (1), are connected to a handset (13) of, for example, a mixer (14) on the side of an audio mixing console (12) via a plurality of CCUs (9), and a plurality of CHU (1) ) (1) . . . are operating a plurality of camera operators (14) (14) . . . via an intercom signal (21).

In Figure 5, the input terminals (23a)...(23n) are the microphones of the headsets (5) (5)... arranged in n CHUs (1) (1)... A call signal is input from the camera operator (6) (6)... and is amplified by the amplifier circuit (25a)...(25n) via the switch (24a)...(24n). The call signal is sent to the modulation circuit (26a)...(26n)
For example, it is FM modulated, transmitted to the CCU (9) side via the coaxial cable (7), and demodulated to the original call signal by the demodulation circuit (27a) ... (27n) on the CCU (9) side. Output amplification circuit (28a)...(28
n) is supplied to the output terminal (29a) after amplification.
...(29n) to the studio or relay van (10n)
) in the audio mixing console (12), and after further amplification in the amplifier circuit (31), the signal is transmitted from the output terminal (32) to the receiver of the handset (13) of the mixer (14). It was designed to send out That is, mixer (14) is CHU (1)
If the switches (24a) to (24n) provided on the sides are in the on state and calls are made at the same time, the call signals of a plurality of camera operators (6), (6), etc. will be heard at the same time.

[Problem to be solved by the invention]

According to the conventional configuration shown in FIG. 5 described above, for example, an audio mixing console (
When viewed from the headset (13) side where the mixer (14) operating the mixer (12) is truncated, there are switches (24a)...(24n) provided on the CHU (1) side.
The coaxial cable (7)
The noise level limit of the signal and, for example, FM noise generated through the modulation/demodulation circuit are added together and output. For example, if there are 10 CHU (],), the noise component will be 1
There was a problem in that the data was added to 0 times and transmitted to the Head Sera (13) side.

Also, the ink cam signal (21) shown in Figure 4 is actually sent to the studio (10) to create a program as shown in Figure 6.
Ink cam signal (21a> (21c) (hereinafter referred to as PRDI) communicated between the producer on the side and the camera operator (6)
N.

PRDout) and ink cam signals (21b) (21d) (hereinafter referred to as IENG, N.

There were two strains: IENGOLIT). However, these two systems of intercom signal lines are not particularly specified for use by producers or engineers, and are used in various ways by users. For this purpose, PRDIN,
When switching between two systems, PRDout/8NGrN and PRDout, there were problems such as the need to recombine the matrix in order to use it in accordance with the user's purpose.

The main purpose of the present invention is to
The object of the present invention is to obtain a video camera device capable of reducing noise mixed into a side herad set (13).

Another object of the present invention is to obtain a video camera device that can utilize two systems of ink cam signals for independent ink cam signal transmission.

[Means to solve the problem]

Examples of the video camera device of the present invention are shown in FIGS. 1 and 3.
As shown in the figure, the first invention includes an imaging means (4)
a C HU (1) with a C CU (1), a C CU (9) connected to this C HU (1) via a cable (7) and controlling this C HU (1), and an output signal via the cable (7). is transmitted to the CCU (9) from the microphone (
5) in a video camera device having a CCU (9
) for selectively outputting the output signal of the microphone (5) to the outside of the CCU (9).
a') (24b') in the CCU (9) and a control means (44a> (44b) for controlling the switch means (24a') (24b') in the CHU (1). The means to solve the problem will be achieved.

The second aspect of the present invention is a CHU (
1), and a CCU (9) that is connected to this CHU (1) via a cable (7) and controls the CHU (1).
and a sound emitting means (5) for converting an audio signal transmitted from the CCU (9) via a cable (7) into a sound wave. a selection switch (33) that selectively supplies the first and second audio signals to the sound emitting means via the cable (7);
a) (33b) (37a) (37b,) as CCU
In preparation for (9), select switches (33a) (33b) (
37a) (37b) Control means (43a) for controlling
) (43b) in CHU (1), a means for solving the second objective is achieved.

[Effect]

According to the video camera device of the present invention, the switches (24a') (24b') provided on the CCU (9) side are controlled by the on/off control signal of the microphone of the headset (5) provided on the CHU (1) side. I made it so that
The CCU (9) reduces the noise level determined by the characteristics of the coaxial cable (7) itself and the noise generated in the modulation/demodulation circuit.
A video camera device is obtained which can supply ink cam signals to the headset of the side audio mixing console (12) and can independently utilize two systems of ink cam signals.

〔Example〕

An embodiment of the video camera apparatus of the present invention will be described below with reference to FIG.

Note that parts corresponding to those in FIGS. 3 to 6 are denoted by the same reference numerals, and redundant explanation will be omitted.

Figure 1 shows a case where two systems of ink cam signals are used for mutual communication.PRDIN and PRDour are used for communication between the producer and camera operator (6), and are also used for communication between the engineer and camera operator (6). ENGIN used, N
BGour is used.

In Figure 1, ink cam ■ and ink cam ■ have the same circuit, so the circuit configuration of ink cam ■ and the circuit configuration of ink cam ■ will be explained at the same time. Indicated by the symbol.

First, talk terminal (23a) on CHU (1) side (23
b) is supplied with talk signals from the microphones of the handsets (5) (5) of the first and second camera operators (6) (6).

This talk signal is transmitted to the amplifier circuit (25a) in the CHU (1).
) (25b), and is amplified by the modulation circuit (25b) as in FIG.
6a) (26b), and is demodulated by the demodulation circuit (27a) (27b) provided on the CCU (9) side via the coaxial cable (7), and amplified by the amplifier circuit (28a) (28b). Later, in the conventional configuration shown in Fig. 5, the switch (24a) installed on the CHU (1) side was removed.
) The first switch (24a'
) and a second system for switching the two systems of yarn paths to independent yarn paths.
switches (33a) (33b) and amplifier circuit (34a)
) (34b) via PRDour and BNGOUT
is output to the output terminals (29a) and (29b) from which the signals are taken out. The output signals from the output terminals (29a) (29b) are sent to the audio mixing console (12) shown in Figure 5.
) through the adder circuit (30) and output amplification circuit (31) of the producer or engineer (14).
(13) The signal is supplied to sound emitting means such as headphones and speakers.

Furthermore, PRO from the microphone of the handset (13) of the producer or engineer (14) on the studio side,
, and IENG [N is the input terminal (3
5a) (35b) and the amplifier circuit (36a)
The audio signal from the producer or engineer side that has been amplified via (36b) is amplified again via the third switch (37a) (37b) that can switch the two thread paths to independent thread paths. It is amplified by the circuit (38a) (38b) and AM or FM modulated by the modulation circuit (39a) (39b), and this modulated signal is sent to the demodulation circuit (1) on the CHU (1) side via the coaxial cable (7). 40a) (40
b) and output amplification circuits (41a) (41b)
After the sound is amplified by the camera operator (6), a sound emitting means such as a headphone or a speaker of the handset (5) on the side of the camera operator (6) is made to emit the sound.

In addition, on the CHU (1) side, there is a microphone switching control means for the Herad set (5), that is, a switch (44a) (44
b), and the first switches (24a') (24b') provided on the CCU (9) side are controlled by the disconnection operation of these switches (44a) (44b). For this purpose, if the movable contact piece a of the first switch (44a> (44b) is turned to the fixed contact side, the control data shown as data (19) in Fig. 4 will be transmitted in parallel via the switches (44a) and (44b). -Linear conversion circuit (hereinafter referred to as P/S) (45a>
(45b) Parallel data is converted to serial data,
Series on the CCU (9) side via coaxial cable (7)
Parallel conversion circuit (hereinafter referred to as S/P) (46a) (46
b) Convert the serial data into parallel data, and switch the contacts a of the first switches (24a') and (24b') to the fixed contact side to turn the talk path into a power-off state.In this state, Noise components of coaxial cable (7) and modem circuits (26a) (26b) and (27a) (27b)
Since the noise components generated in the studio do not reach the sound emitting means (13) of the producer or engineer (14) on the studio side, the S/N ratio can be significantly improved.

If the movable contact piece a of the switch (44a) (44b) is tilted toward the fixed contact C side, the first switch (24a') (24b)
') is in the "on" state and talk is possible.

Furthermore, there are switches (43a) (43b) provided on the CHU (1) side for selecting a call with a producer or engineer.
Various combinations can be made depending on the selection.

The movable contact piece a of the switch (43a> (43b) is P/
, S (45a) (45b) - Coaxial cable (7)
→Second and third switch (33a) (33b) (37a) via S/P (46a) (46b)
(37b) Control the contact piece a. As shown in Fig. 1, when the movable contact pieces a of the switches (43a) (43b) are in contact with the fixed contacts, the second and third switches (33a) (33b) (37a) (37b) P/S (4
The control signal 6a) controls the ink cam ■ and the ink cam ■ both PRDIN and PltD.
Only OUT can be used for calls, 11iNG 1. and BNGout calls cannot be made.

Second and third switches (33a> (33b) (3
7a) If the movable contact piece a of D7b) is brought into contact with the fixed contact side, both the ink cam I and the ink cam ■ are B.
N.G.I.N.

Only ENGOLIT can talk, PR(]+,l
and PR1] out, making it impossible to make a call. In addition, as shown in Figure 1, the switch (43a) can be moved to the fixed contact side by turning the contact piece a to the fixed contact side, and the switch (43b) can be turned to the fixed contact point C by turning the fixed contact piece a to the fixed contact C side.
It is possible to talk to PItD and UT, and the ink cam ■ can talk to ENG□ and ENGoLIT, respectively.

Conversely, as shown in Figure 1, if you move the movable contact piece a of the switch (43b) to the fixed contact side and move the movable contact piece a of the switch (43a) to the fixed contact C side, the ink cam ■ side will be BN.
G,..., BNG, UT call and ink cam ■ is P
The call will be RO, □PROoLIT. In other words, as in the past, ink cam I communicates with PRD, and ink cam ■ communicates with IE.
This has the effect that the CHU (1) side can select various independent communications depending on the usage status of the user, without being identified as a conversation with an NG.

FIG. 2 shows another embodiment of the invention.

In FIG. 2, parts corresponding to those in FIG. 1 are given the same reference numerals and redundant explanations will be omitted, but in FIG. Modulation and demodulation circuits (26a) (39a) (26b) provided in
) (39b) (27a>(40a> (27b)
(40b) P/S installed in the control line as well
(45a) (45b), S/P (46a) (4
6b) is omitted. Furthermore, an amplifier circuit (36a)
(34a) and the input/output terminals (35a) (35b) are provided with switches (45) and (46), and the CCU (
9) from the control panel provided on the rear panel (49), input a control signal such as "PON""OFF" and turn on the switch (3).
7a> (37b) (33a) (33b) (45)
(46) is controlled. That is, CHU (1)
Each switch (24a') (24b') (33a
) (33b) (37a) Because (37b) can be freely selected, when a producer or technician is trying to talk to a camera operator, there are cases where the string is turned off and the conversation becomes impossible. Therefore, control items 1 and 2 as shown in Table 1 below are provided so that the producer or engineer can preferentially change the state to a callable state.

Table 1 In control item 3, the receiver and talk line are forcibly connected to the producer side so that both ink cams I and II can receive calls from the producer side, and in control item 4, the switch ( By turning off the CHU (46), all talk from the CHU (1) side is cut off. These controls are controlled by the gate circuit (47) (4g) and the rear panel (49).
This can be easily done using control signals from a control panel installed in ).

According to each embodiment of the present invention, it is possible to reduce the noise that enters from the CHU side to the CCU side when the handset's microphone is turned off.Also, the two systems of intercom signals, which could only be switched between the professional monitor and the engineer, can be used independently. Now, it is possible to obtain a video camera device that can be applied to various ranges of use depending on the user's requirements.In particular, in a configuration where the system has only two systems and one CHU, conventionally only one system was used. Although it was not available, it has many features such as the ability to choose between two systems.

It should be noted that the present invention is not limited to the embodiments described above, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention has the advantage of providing a video camera device that can reduce the noise mixed into the sound emitting means of the Herad set on the CCU (9) side, and can utilize two systems of ink cam signals for independent ink cam signal transmission.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing one embodiment of the video camera device of the present invention, Fig. 2 is a system diagram showing another embodiment of the video camera device of the invention, and Fig. 3 explains a conventional camera system. Conceptual diagram, Figure 4 is a conventional transmission signal allocation diagram, Figure 5
The figure is a system diagram showing a conventional ink cam signal transmission path, and FIG. 6 is an ink cam signal allocation diagram. (1) is CHU, (7) is coaxial cable, (9) is CC
U. (25a) (25b) (28a) (28b) (
36a) (36b) (38a) (38b) (4
1a) (41b) is an amplifier circuit, (26a) (26
b) (39a> (39b) is a modulation circuit, (27a)
(27b) (40a> (40b) is a demodulation circuit. [Effects of the Invention] According to the video camera device of the present invention, the CHU (1)

Claims (1)

[Claims] 1. A camera head unit equipped with an imaging means, a camera control unit connected to the camera head unit via a cable and controlling the camera head unit, and an output signal transmitted via the cable. In a video camera device having a microphone transmitted to the camera control unit, the camera control unit includes a switch means for selectively outputting the microphone output signal transmitted to the camera control unit to the outside of the camera control unit. A video camera apparatus characterized in that the camera head unit is provided with a control means for controlling the switch means in preparation for the above. 2. A camera head unit equipped with an imaging means, a camera control unit connected to the camera head unit via a cable and controlling the camera head unit, and audio transmitted to the camera control unit via the cable. In a video camera device having a sound emitting means for converting a signal into a sound wave, first and second audio signals supplied from the outside to the camera control unit are selectively transmitted to the sound emitting means via the cable. A video camera apparatus, characterized in that the camera control unit is provided with a selection switch for supplying the signal, and the camera head unit is provided with control means for controlling the selection switch.