JPS60167A - Video camera device - Google Patents

Abstract

PURPOSE:To attain start/stop of a VTR without operating a polarity changeover switch by transmitting control information of a video recording command signal to a video recording command signal line in a cable based on an output of a detection circuit. CONSTITUTION:When a switch 14 is thrown to the position of a contact (b), a point A is at low level L and when thrown to the position of a point (c), the point A is at high level H and the relation of the level is the same as a convertional device. in throwing the switch 14 to the position of contact (a), the level of a terminal 1 at the PLAY mode is level H because a DC voltage is superimposed, the level is l at the REC mode, the level of the point A is L at the REC mode and level H at the PLAY mode. Thus, while the level of the terminal 6 is brought into H at the REC mode by turing on a switch 15 and the level is brought into L by turning off the switch 15, the level of the terminal 6 is brought into H at the PLAY mode, allowing to observe a reproduced picture of the VTR by an electronic view finder of a camera main body.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a video camera device.

Configuration of the conventional example and its problems As shown in FIG. 1, a video camera device is formed from a camera body 1 and a cape lv3 to which a magnetic gauze reproduction device (hereinafter abbreviated as VTR) 2 is connected. If the specifications are the same, the camera body 1 can remotely control the VTR 2.

Here, cape) v 3 u normal A1-71; 1o of 1
0 line, high 1i-1' video signal IN/, O
U.T.

A, 21819 is ground, /Ffi, 3rd serial data.

Report 4 is serial clock/tally r I'a 6 iJ
Nukumbai/(audio 2h), notification 6 is recording (REC)
).

Todoroki 7 is an audio line, and Ni 1o is a power line, and when recording (REC) on the horse 6 line (7), the start/stop level is high (H)'/low (L).

It is assumed that the level at pi and AY is L.

Note that due to manufacturer differences, the start/stop level at R10 may be 1. /H, PLAY level is H, and in order to adapt the canora body 1 to this type of VTR, it is possible to install a polarity switch on the camera body 1 side and change the polarity with that switch. become.

However, if start/stop control is performed using H/L on the 6th line during both REG and playback (PLAY), the fM property on the camera body 1 side must be operated each time during PLAY.

That is, it is necessary to operate a switch separately from the REO/PLAY switch provided on the camera body 1.

OBJECTS OF THE INVENTION The present invention eliminates these drawbacks and provides a video camera device configured so that a VTR can be started and stopped without operating a polarity changeover switch.

Structure of the Invention In order to achieve the above object, the present invention focuses on the fact that a direct current (NC) voltage is superimposed on the first line that transmits the video signal during PLAY, and utilizes this to superimpose the line No. 6 for transmitting the video signal. You can choose the level of

DESCRIPTION OF THE EMBODIMENTS The following will explain an embodiment shown in FIG. Here 1-10
These terminals correspond to the lines A1 to &1o of Cape/l/3 shown in FIG. 14 is a polarity changeover switch, 12 is a transistor, 11 is an inverter, a start/stop switch at 1sllRKc, 16 is a control circuit, and No. 6 outputs an output according to the level of point A based on the RHO/PLAY selection signal from terminal B. Output it to the terminal. That is, it operates as shown in the table below.

[0... When the polarity is switched] Next, the operation based on this configuration will be explained. First, if the switch 14 is located at contact B, it is at the level of point A HL, and if it is located at point 0, it is at the level of point A 1 dH, which is the same as in the conventional example.

When the switch 14 is placed at contact a, the 1st terminal is P.
It is H because the DC voltage is superimposed during LAY, and 11
0 o'clock is L, point A is at REG and H at PLAY. Therefore, during REG, terminal 6 can be set to iH when the switch 16 is on, and to L when it is off, while it can be set to H during PLAY, and the reproduced image of the FTH can also be viewed on the electronic viewfinder of the camera body 1.

Effects of the Invention Although the embodiments have been described above, the present invention is advantageous in practice because start/stop control can be performed for any type of VTR.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a connection state between a video camera device and a VTR, and FIG. 2 is a circuit diagram of a main part of the video camera device in an embodiment of the present invention. 14°°°°°° polarity switch, 16...
RICC nude/stop switch, 16...
control circuit.

Claims (3)

[Claims] (1) A detection circuit that detects voltage information transmitted superimposed on lines that transmit all video signals in a cable that has multiple signal lines connected to a magnetic recording/playback device, and based on the output of this detection circuit. A video camera device comprising: a line in the cable for transmitting the recording command signal; and a control circuit for transmitting control information of the recording command signal. (2) The video camera device according to claim 1, wherein the detection circuit for detecting voltage information has a two-circuit changeover switch for selecting voltage information and selecting fixed voltage information. (3) The video camera device according to claim 1, characterized in that the detection circuit includes a three-circuit changeover switch so that selection of voltage information and selection of H/L voltage information can be performed.