JPS63142793A - Magnetic recording and reproducing device with plural picture synthesizing function - Google Patents

Abstract

PURPOSE:To inform which of a parent and a child pictures is in course of a recording, to an operator by providing a frame generating means and its control means to form a frame capable of being colored and being controlled, around the picture of a child signal to be synthesized to a parent signal. CONSTITUTION:A frame gate generation circuit 34 borders the child picture to be synthesized to the parent picture, and operates so as to color the frame responding to a control circuit 15. The control circuit 15 detects a connection position between a switch circuit 13 to switch plural video signals to be inputted as the parent and the child signals, and the switch circuits 12, 14 to switch plural video signals as recorded signals, and when the recorded signal coincides with the video signal selected as the child signal, the control circuit 15 acts on the frame generating means, and makes a chrominance signal generation circuit 38, which the frame generating means has, operate. Thus, it can be informated that the recording picture at the time when a magnetic recording and reproducing device (VTR) is in course of a recording, and besides, the picture, synthesized with the parent and the child is displayed on the cathode-ray tube of a television receiver set, whether it is the parent picture or the child picture is noticed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic recording and reproducing device having a plurality of screen composition functions, in which a screen being recorded among a plurality of screen displays can be identified and displayed. Regarding a playback device.

[Conventional technology]

Currently, as an application of digital technology that uses memory, there is a function that allows you to reduce and insert another image into a part of a TV image.
28~Sulfur listed.

FIG. 3 is a block diagram of a screen synthesis circuit explaining the above-mentioned conventional technology, in which 1 is a child screen processing block, 2 is an A/D conversion circuit, 3 is a child screen processing circuit, 4 is a memory, and 5 is a D/D/D conversion circuit. A
A conversion circuit and 6 are a synthesis circuit.

In the figure, a child screen processing block 1 has a function of reducing and combining a second video signal (hereinafter referred to as a child signal) with a first video signal (hereinafter referred to as a parent signal). In this child screen processing block 1, the input child signal is converted to an analog/digital conversion circuit (hereinafter referred to as a digital conversion circuit).
2 converts the amplitude into a 10'', '1# digital signal and inputs it to the small screen processing circuit 3.

In the small screen processing circuit 5, vertical spacing is performed in synchronization with a synchronization signal when performing a television signal format, and the signal of the selected horizontal line is sampled in a time-division manner. The horizontally and vertically divided signals for one screen are stored in the memory lJ4. Then, the child signal stored in the memory 4 is read out by the child screen processing circuit 3 in synchronization with the synchronization signal of the parent signal, and passed through the digital/analog conversion circuit (hereinafter referred to as the D/A conversion circuit) 5 horizontally. , creates a child signal which is an analog signal that is vertically reduced, and this child signal is inserted into the parent signal by the synthesis circuit B in response to a control signal from the child screen processing circuit 3 synchronized with the synchronization signal of the parent signal. and are synthesized.

FIG. 4 is a block diagram showing a circuit configuration in which the screen synthesis circuit shown in FIG. 3 is applied to a magnetic recording/reproducing device,
1 is a tuner, 11 is an external input terminal, 12, 15, 14 is a switch, and 15 is a control circuit.

Also, the same reference numerals as in FIG. 3 indicate the same parts.

In the figure, a magnetic recording/reproducing device (hereinafter referred to as a VTR) is capable of so-called parent-child display, in which one display of a plurality of video signals from a plurality of video signal sources is combined with the display of the other and displayed on the screen. The signal combination is the video signal (v5) played from the '/TR tape, and the built-in tuner 1.
The video signal (vl) from 0 and the video signal (v2) input via the external input terminal 11.

These video signals are selected via the switch 12.13 and output as the parent signal (vp) - child signal (V, ) to the third
It is input to a screen synthesis circuit 100 similar to the circuit shown in the figure.

In addition, the tuner 1 is used as a recorded signal to the video recording system.
0 and the video signal from external input terminal 11 is sent to switch 1.
4 is selected.

Further, the control circuit 15 controls the switches 12, 13, and 14 in response to an operation command signal from an operator.

Now, the parent-child screen display on a VTR is a combination of the video signal (V,) from the tuner 10 and the video signal (v2) from the external input terminal 11 or the video signal (v3) played from the VTR tape. Do it with That is, the switch 13 receives the video signal (v2) from the external input terminal 11.
and the video signal (v3) reproduced from the tape are switched and input to the switch 12. Then, the switch 12 switches between the video signal from the switch 13 and the video signal from the tuner 10, respectively.
), the parent signal (V, ) is sent to the synthesis circuit 6, and the child signal (V
C) is connected to the A/D conversion circuit 2. Parent signal (VP
) and the child signal (vc) can be selected as the parent signal or the child signal by selecting contacts A and H.

The signals that have passed through the combining circuit 6 are combined into a video signal and are input directly to a television receiver or via an antenna on a carrier wave. A switch 14 connects a tuner 10, which is a video signal source to be recorded on a videotape, and an external input terminal 1.
1 is connected to terminal A.

Switch to selection B.

[Problem that the invention seeks to solve]

In the above conventional technology, when the magnetic recording/reproducing device is in a recording state and the TV receiver is displaying a parent-child composite of video signals from a tuner and an external input terminal, which of the parent-child signals is being recorded. There was a problem in that it was not possible to tell whether it was on the cathode ray tube.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a magnetic recording and reproducing apparatus that can inform an operator of which of the parent and child screens being displayed on a cathode ray tube is being recorded.

[Means for solving problems]

The above object is achieved by providing a frame generating means capable of controlling coloring around the screen of the child signal to be combined with the parent signal, and a control means therefor.

[Effect]

The frame generating means operates to divide the number of child screens to be combined with the main screen, and to color the frame in response to the control means.

The control means for controlling the frame generation means detects the connection position of the switching means for switching the plurality of video signals to be input as the parent signal and the child signal, and the switching means for switching the plurality of video signals as the recorded signals, and When the recording signal and the video signal selected as the child signal match, it acts on the frame generating means to operate the coloring means included in the frame generating means. by this,
To inform whether a recording screen is a composite image when a magnetic recording reproducing device (VTR) is recording and a parent-child composite image is being displayed on a cathode ray tube of a television receiver. I can do it.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention,
The same reference numerals as in FIG. 4 indicate the same parts, and 20 is a recording screen display circuit. When a video is being recorded and the display on the cathode ray tube of the television receiver is parent-child compositing, it is displayed on the child screen. If the current video signal is a recorded signal, the coloring of the sub-screen frame is changed to indicate that it is a recording screen.

FIG. 2 is a circuit diagram showing the internal configuration of the recording screen display circuit in FIG.
21 is a control block, 22 is a child screen frame generation block, 30.33 is an AND circuit, 31 is a NOR circuit, 32 is an OR circuit, 34 is a frame gate generation circuit, and 35 is a frame signal width control circuit. , 36 is an AND circuit, 37 is a switch circuit, 38 is a color signal generation circuit, and 39 is an addition circuit.

First, the switches 12 and 14 are connected to the contacts (A) of each switch when the signals on the signal paths (a) and (b) from the control circuit 15 are "H", and when they are "L#" In other words, in this embodiment, a combination in which V'l'R is in the recording state and the recorded signal and the signal displaying the sub-screen are the same is connected to the switch 12.
．． 14 is connected to the contact (A) when the tuner 10 is selected, and connected to the contact (B) when the switch 1 is selected.
When the external input terminal 11 is selected via 3,
Signal paths (a) and (b) for switching switches 12 and 14
This is when the signals are simultaneously "Ll".

In FIG. 2, signal paths (a) and (b) are connected to signal paths with the same symbols in FIG. The signal paths (A) and (B) are connected to an AND circuit 30 and a NOR circuit 31, and the AND circuit 30 converts the “H” state of the signals on the signal paths (A) and (B) into the NOR circuit.
The circuit 31 detects the state of 1L". The OR circuit 32
When the AND circuit 30 or the NOR circuit 31 is 1H", the gate is opened and this is input to the AND circuit 33.
The AND circuit 33 is connected to a signal path (C) that transmits an "H" signal when video is recorded, and is selected and transmits the signal from the OR circuit 32 only when video is recorded.

The "H" signal from the Al1 circuit 33 obtained here is when the video is being recorded and the switches 12 and 14 are simultaneously selecting the contact (A) or the contact CB). Therefore, according to this control block 21, it is possible to detect that the video signal selected as the child signal is the recorded signal.

Next, in the child screen frame generation block 22, the frame gate generation circuit 34 is connected to the signal path ) from the child screen processing circuit 3 and responds to the signal generated in the signal path ) in synchronization with the parent signal. Then, a pulse signal for framing having a certain time at the boundary between the child screen and the main screen is generated. (on the signal path shown here)
The frame gate generation circuit 34 receives this signal and drives the memory 4 (the signal consists of a plurality of signal paths from an address counter (not shown) for driving the memory 4 of the child screen processing circuit 3). A pulse signal that becomes a frame is synthesized at a certain time before and after that.

The frame gate generation circuit 34 further includes an amplitude control circuit 35 and an A
Connected to the ND circuit 36. The width control circuit 35 receives the frame signal from the frame gate generation circuit 34 and determines the brightness level of the frame, and is connected to the addition circuit 39. AND circuit 3
The frame signal and the control signal from the AND circuit 33 are input to 6, and this switch circuit 37 connects and connects the switch circuit 67 connected to the AND circuit 36 to the adder circuit 39.
and the color signal generation circuit 38, and the color signal generation circuit 38 is connected to the color signal generation circuit 38.
Occurs in For example, an A5B MHz signal having a certain phase with respect to the burst signal of the parent signal is turned on and off by a switch 37 responsive to a frame signal coming through an AND circuit 36, and added to the frame signal whose amplitude has been controlled by an adder circuit 39. In other words, the "H" signal from the AND circuit 33 is a child signal on the cathode ray tube, and means that it is a recorded signal.
The AND circuit 36 superimposes a color signal on the frame signal in order to color the child screen frame.

In this embodiment, the control block 21 is constituted by a logic circuit, but if it is constituted in the control circuit 15 described above, for example, an arithmetic processing circuit (a stored program type microcomputer) is used for this control circuit 15. , the above functions can be executed on software.

Furthermore, here instructions for the recording screen are displayed depending on whether or not the sub-screen frame is colored, but the above device is provided with a character/figure generating means, and instructions for screen identification are displayed on the recording screen using characters and figures. You can also do that.

As described above, according to this embodiment, by changing the color of the frame of the child screen, it is possible to easily confirm which of the two displayed screens is being recorded.

〔Effect of the invention〕

As explained above, according to the present invention, the coloring of the sub-screen frame that is currently being recorded among the plurality of sub-screens configured on the cathode ray tube is changed, and the recorded screen can be checked in the multi-screen display. Therefore, it is possible to provide a magnetic recording and reproducing apparatus with a multi-screen compositing function that has excellent functions except for the drawbacks of the above-mentioned prior art.

[Brief explanation of the drawing]

1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing the internal configuration of the recording screen display circuit shown in FIG. 1, and FIG. 3 is a block diagram of a screen composition circuit according to the prior art. 4
This figure is a block diagram showing a circuit configuration in which the screen synthesis circuit shown in FIG. 3 is applied to a magnetic recording/reproducing device. 1... Child screen processing block, 2... A/D conversion circuit. 6...Small screen processing circuit, 4...Memory, 5...D
/A conversion circuit, 6... Synthesis circuit, 10... Tuner, 11... External input terminal, 12.13.14... Switch, 15... Control circuit, 20... Recorded image display Circuit, 21...Control block, 22...Senryo frame generation block, 30.33,56...AND circuit, 31...NOR
Circuit, 32...OR circuit.

Claims (1)

[Claims] 1. A plurality of video signal sources, one of the video signals from the plurality of video signal sources is combined with another video signal to display a composite screen, and a selected video from the plurality of video signal sources is displayed. In a magnetic recording and reproducing device with a multi-screen compositing function capable of recording signals, a video signal selection switch for displaying the composite screen, a signal indicating the selection state of the video signal selection switch to be recorded, and a video signal to be recorded. Magnetic recording with a multi-screen compositing function, characterized in that it is equipped with a means for inputting a signal indicating that a video signal is to be recorded and coloring the compositing screen frame of the video signal to be recorded to indicate that the video signal is to be recorded. playback device.