JPS6054573A - Video camera device - Google Patents

Abstract

PURPOSE:To perform recorded picture checking (REC-R) irrespectively of the type of VTRs, by discriminating a VTR connected with a camera whether or not it requires a serial code signal for making the REC-R and outputting control signal in accordance with the VTRs. CONSTITUTION:Since a serial clock appears at a terminal 4 when a VTR connected with a cable operates with a serial code, the clock is sent from a discriminating circuit 32 to a serial code generating circuit 34 through a signal line 41 when an REC-R switch 31 is turned on. A code generated from the generating circuit 34 is outputted as serial data to a terminal 3 through a discriminating circuit 33. On the other hand, when a VTR connected with the cable is of another type, no serial clock appears at the terminal 4, and therefore, the discriminating circuit 32 operates a constant voltage generating circuit 35 and outputs a constant voltage to the terminal 3 through the discriminating circuit 33 when the switch 31 is turned on.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a video camera device used in connection with a magnetic recording/reproducing device.

Conventional configurations and their problems - Some video camera devices and magnetic recording/reproducing devices (hereinafter referred to as VTRs) have a function called REC-REVIEW (hereinafter referred to as REC-R).

Here, REC-R means that when you start recording with a video camera and VTR connected, and then stop recording after recording for a certain period of time (pause state), the few seconds immediately before stopping recording are correctly recorded. It rewinds a few seconds to check whether the video is being recorded and what kind of recording is being made, and the playback image is displayed on the electronic viewfinder of the video camera or on the TV monitor, and the point at which the previous recording was stopped. The playback image is displayed until then, and then it enters recording pause mode.

Still, there is usually only one cable connecting the VTR and video camera.
It consists of 0 cores, and each has the following functions.

(Layer/Ding Yutaku) In the above configuration, in the case of one combination, the serial code signal is used to connect the video camera device and the VTR.
EC-H is controlled, and in the case of one particular combination, R11-H is controlled by superimposing a constant voltage between the video camera device and the VTR.

Therefore, even if a video camera device that is controlled by a serial code signal is connected to a VTR that is controlled by superimposing a constant voltage, REC-R cannot be performed, and conversely, a video camera device that can be controlled by superimposing a constant voltage cannot be controlled by a serial code. VT to do
There was a drawback that REC-R could not be performed even if connected to R.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks and provides a video camera device that can perform REC regardless of the type of VTR connected.

Structure of the Invention In order to achieve the above object, the present invention provides a serial
TR is the serial code signal TEREC-R, 7) V
It is designed to determine whether the VTR is to be applied with TR or RE C-R, and to send a control signal corresponding to the VTR to the VTR through the third terminal.

DESCRIPTION OF EMBODIMENTS The following will explain one embodiment of the present invention with reference to the drawings. FIG. 1 shows the connection relationship between a video camera 11, a VTR 12, and a cable 13, and 14 is an RF and C-R switch. Second
The figure is a block diagram of the main parts of the camera 11, and 31 is 1 in Figure 1.
Switch corresponding to 4, 32 is a discrimination circuit and switch 31
If there is a serial clock when the serial clock is turned on, line 41 is selected, otherwise line 43 is selected. 34 is a serial code generation circuit, and 33 is a discrimination circuit which selectively outputs the signals on lines 42 and 44 to the 3@ terminal depending on the presence or absence of a serial clock.

35 is a constant voltage generating circuit.

Here, if the VTR 12' connected to the cable 13 operates with a serial code, the serial clock is output from the 4th terminal, so when the switch 31 is turned on,
The clock is transmitted from the discrimination circuit 32 to the serial code generation circuit 34 through the signal line 41. The code generated by the serial code generating circuit 34 is sent for discrimination through a line 42.

33 and is sent to terminal 3 as serial data.

On the other hand, if the connected VTR 12 is of another model, there is no serial clock at the No. 4 terminal. In this state, switch 31
When turned on, the discrimination circuit 32 operates the constant voltage generation circuit 35 through the line 43, and this output is outputted to the third terminal through the line 441 discrimination circuit 33.

According to the above configuration, when the switch 31 is turned on, the serial data is transmitted regardless of the presence or absence of a signal at the No. 4 terminal.

One of the constant voltages will be supplied to the third terminal.

Effects of the Invention As explained above with reference to the embodiments, the present invention is advantageous in practice because it is possible to check the REC knee R1, that is, to check the recording regardless of the connected VTR.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the connection relationship between a video camera and a VTR;
FIG. 2 is a block diagram of essential parts of a video camera device according to an embodiment of the present invention. 11...video camera, 12.river...VTR,
13...Cable, 14.31...Recording check switch, 32.33...Discrimination circuit, 34...Serial code generation circuit, 35...
...Constant voltage generation circuit.

Claims (1)

[Claims] When the serial code generation circuit, constant voltage generation circuit, and recording check switch are turned on, the signal applied to the terminal of the serial clock transmission line in the cable connected to the magnetic recording/playback device is determined, and depending on the presence or absence of that signal, the above serial code is detected. A video camera device comprising means for supplying the output of one of a generating circuit and a constant voltage generating circuit to a terminal of a serial data transmission line.