KR910001219B1 - Picture in picture circuit of vtr - Google Patents

Abstract

The circuit in picture in picture (PIP) mode, displays a frame of channel to be searched in a mother frame of reproduced program or current displaying broadcasted program. The circuit comprises a video signal selecting unit for transmitting gain adjusted first video signal and reproduced video signal to PIP frame composer (40) an audio signal selector for transmitting a first and a second audio signal according to record control signal from a microcomputer and a PIP frame control signal from a second switch, and a mute circuit for composing monoframe by muting PIP frame composing control signal.

Description

Picture-in-picture broadcast screen composition circuit of video tape recorder

1 is a circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

10, 12: broadcast video signal selection unit 11: video signal playback unit

20-22: automatic gain control circuit 30, 32: broadcast audio signal selection unit

31: audio signal playback unit 40: PIP screen configuration unit

50: playback audio signal processor 51: broadcast audio signal processor

60: buffer circuit 70: luminance signal processing unit

80: color signal processing unit 90: video recording unit

100: audio recording SW1-SW7: switch

Q1-Q8: Transistor D1-D3: Diode

R1-R8: resistance

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape recorder (hereinafter referred to as a VTR), and more particularly to a circuit for configuring other broadcast programs in a mother screen of a playback video program or a broadcast program being watched.

In the conventional VTR system, in order to check a broadcast program of another channel while selecting a channel and watching a broadcast program, the current VTR system must give up the broadcast program being viewed and select another channel, and also play a video tape by playing a video tape. In order to check a broadcast program, a desired channel must be tuned to a desired channel after the playback of the playback program.

Accordingly, an object of the present invention is to refer to the playback program of the video tape being watched or to the parent screen of an arbitrary broadcast program. PIP) is to provide a broadcast screen composition circuit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram of the present invention, which includes a first broadcast video selecting unit 10 for selecting a broadcast video signal, a video signal reproducing unit 11 for reproducing a video signal on a video tape, and a broadcast video signal for selecting a broadcast video signal. Gains of the first and second broadcast video signals of the second broadcast video selector 12, the first and second broadcast video selectors 10 and 12, and the playback video signal of the video signal reproducer 11; A video recording unit for recording the first to third automatic gain adjusting circuits 20 to 22 that are constantly adjusted, and the gain-adjusted second broadcast video signal of the third automatic gain adjusting circuit 22 to the videotape; 90) a single screen video signal consisting of the first broadcast video signal of the first broadcast video signal selector 10 or the playback video signal of the video signal playback unit 11, or the first broadcast video signal or The second broadcast video on the playback video signal The PIP screen configuration unit 40 which configures the second broadcast video signal of the erroneous signal selection unit 12 as a sub picture or a video signal of the PIP screen reversed from the above, and the PIP screen configuration unit through the buffer circuit 60 ( A luminance signal processing unit 70 for inputting and processing a video signal of 40 to generate a luminance signal, and a color signal processing unit for generating a color signal by input processing the video signal of the PIP screen configuration unit 40 through a buffer circuit 60; 80, a first broadcast audio signal selector 30 for selecting a broadcast audio signal, a second broadcast audio signal selector 32 for selecting a broadcast audio signal, and audio for reproducing an audio signal on a video tape A signal reproducing unit 31, a reproducing audio signal processing unit 50 for processing a reproducing audio signal of the audio signal reproducing unit 31 to generate a first audio signal, and the first and second broadcast audio signal selecting units The first and second broadcast audio signals of (30 and 32) A broadcast audio signal processor 51 for processing and generating a second voice signal, an audio recorder 100 for recording the first audio signal of the broadcast audio signal processor 51 on a video tape, and a fourth switch SW4. Gain-adjusted reproduction ratio input from the gain-controlled first broadcast video signal input from the first automatic gain adjustment circuit 20 or from the second automatic gain adjustment circuit 21 due to the video control signal applied from the microcomputer. Video signal selection transmission means for transmitting the error signal to the PIP screen composition unit 40, and the first broadcast video signal or the playback video signal being viewed by the viewer's operation as the mother screen, and the second broadcast video signal as the mother screen. A first switch SW1 for generating a PIP screen configuration control signal for controlling the PIP screen configuration, and a P generated by the PIP screen configuration control means by performing a switching operation according to the viewer's operation. The second switch (SW2) for generating a PIP screen control signal for changing the IP screen configuration control signal from the mother screen to the mother screen and the voice signal according to the mother screen. The third switch SW3 and the second to fifth transistors Q2- that generate a pulse movement control signal of the pulse to sequentially move the position of the child screen up, down, left and right in the PIP screen by switching operation whenever pressing. Q5) and a first broadcast audio signal selection unit composed of a plurality of resistors R3-R4 and a fifth switch SW5 by a recording control signal applied from a microcomputer and a PIP screen control signal of the second switch SW3. Audio signal selection transmission means for transmitting the first broadcast audio signal of the 30 or the second broadcast audio signal of the second broadcast audio signal selector 32 to the selective broadcast audio signal processor 51, and the first transistor Q1. ) And resistor R2 and sixth switch SW6 Selects the first audio signal of the reproduction audio signal processor 50 or the second audio signal of the broadcast audio signal processor 51 based on the PIP screen control signal of the second switch SW2 and the video control signal applied from the microcomputer. A voice signal selection transmission means for transmitting the television receiver A, a sixth to eighth transistors Q6-Q8, a plurality of resistors R6-R8, a plurality of diodes D1-D3, and a seventh switch SW7. The first switch is applied through the first audio signal and the resistor Rl of the reproduction audio signal processor 50 by the PIP screen control signal of the second switch SW2 and the mute control signal applied from the microcomputer. PIP screen configuration of (SW1) mute means for muting the control signal to form a single screen instead of the PIP screen.

The present invention will be described in detail based on the above configuration. First, if a low logic video control signal is applied from the microcomputer to the line 4 while the signals applied from the first to seventh switches SW1-SW7 and the microcomputer are low, the low logic on the line 4 is applied. The fourth switch SW4 turns on the contact b1 by the video control signal in the state. The first broadcast video signal selector 10 outputs the first broadcast video signal of the first channel tuned among the broadcast video signals to the first automatic gain adjustment circuit 20, wherein the automatic gain adjustment circuit 20 is The gain of the first broadcast video signal is constantly adjusted and output to the first input terminal FI of the PIP screen driver 40 through the fourth switch SW4. Meanwhile, the second broadcast video signal selector 12 also outputs the second broadcast video signal of any second channel to be tuned among the broadcast video signals to the third automatic gain control circuit 22, wherein the second automatic gain control circuit ( 22 also outputs the second broadcast video signal of the second broadcast video signal selector 12 to the second input terminal of the PIP screen driver 40 by constantly adjusting the input gain. At this time, the PIP screen configuration unit 40 in the initial state inputs the first broadcast video signal applied to the first input terminal FI to generate a single screen video signal through the luminance signal processing unit 60 through the buffer circuit 60. 70 and the color signal processing unit 80, the luminance signal processing unit 70 generates a luminance signal by processing a video signal that is a single screen of the PIP screen configuration unit 40 input through the buffer circuit 60 The color signal processing unit 80 which outputs to the television receiver and inputs a video signal which is a single screen of the PIP screen configuration unit 40 through the buffer circuit 60 also processes the video signal and outputs the color signal to the generation television receiver. Video signal display.

On the other hand, the fifth switch SW5 and the sixth switch SW6 also maintain the contacts b2 and the contact b3 ON in the initial state, respectively, so that the fifth switch SW5 is the first and the second. The first of the first broadcast audio signal selector 30 among the first and second broadcast audio signals of any of the first and second channels that the broadcast audio signal selectors 30 and 32 tune and output among the broadcast audio signals, respectively. The broadcast audio signal processor 51 for outputting a broadcast audio signal to the selective broadcast audio signal processor and inputting the first broadcast audio signal of the first broadcast audio signal selector 30 may process the first broadcast audio signal to generate a broadcast audio signal. The second audio signal is output to the television receiver through the sixth switch SW6 having the generating contact b3 turned on. At this time, when the viewer operates the first switch SW1 to search for the program of the second channel while watching the first broadcast video signal and the audio signal through the television receiver, the first switch SW1 returns to the first power source Vcc. A PIP screen configuration control signal in a high logic state is generated on the line 1 and applied to the first control input terminal FCI of the PIP screen configuration section 40 via a resistor R1.

The PIP screen configuration unit 40 which inputs the PIP screen configuration control signal in the high logic state of the first switch SW1 to the first control input terminal FCI controls the third automatic gain by the PIP screen configuration control signal. The second broadcast video signal applied from the circuit 22 to the second input terminal S1 is input to the first input terminal F1 via the fourth switch SW4 from the first automatic gain adjusting circuit 20. A video signal of a PIP screen having the first broadcast video signal being input as a mother screen and the second broadcast video signal as a parent screen is generated to a luminance signal processor 70 and a color signal processor 80 via a generation buffer circuit 60. Output

The luminance signal processing unit 70 for inputting a video signal of the PIP screen configuration unit 40 which is a PIP screen through the buffer circuit 60 processes the video signal of the PIP screen and outputs the video signal to a television receiver. The color signal processing unit 80 for inputting the video signal of the PIP screen configuration unit 40, which is the PIP screen, also processes the video signal, which is the PIP screen, and outputs the color signal to the television receiver. The PIP screen in which the broadcast video signal is the mother screen and the second broadcast video signal is the child screen is displayed.

At this time, the viewer views the PIP screen in which the first broadcast video signal is the mother screen and the second broadcast video signal is the mother screen through the television receiver, and then watches the first broadcast video signal displayed on the mother screen as the mother screen. When the second switch SW2 is operated and turned on, the second switch SW2 is a high logic state PIP screen configuration control signal on the line 1, and a high logic state PIP screen control signal is supplied to the line 2. Occurs in the phase.

Then, the PIP screen configuration unit 40 inputs the PIP screen control signal in the high logic state on the line 1 to the second control input terminal SCI to display the mother screen constituted by the PIP screen control signal. By outputting the video signal of the PIP screen having the mother screen as the mother screen to the luminance signal processing unit 70 and the color signal processing unit 80 via the generation buffer circuit 60 to the luminance signal processing unit 70 and the color signal processing unit 80. The video signal of the PIP screen having the mother screen and the mother screen inverted is output, and the luminance signal and the color signal are output to the generated television receiver and displayed on the television receiver.

On the other hand, the fifth switch SW5 inputs the PIP screen control signal in the high logic state on the line 1 through the resistor R2 through the second transistor Q2 and the third transistor Q3, which serve as a buffer. The on-state a2 is turned on by the high logic state PIP screen control signal to transmit the first broadcast audio signal to the selected broadcast audio signal processor 51, while the sixth switch SW6 is line 2 PIP screen control signal, which is a high logic state on the base, is applied to the base and the low logic state output of the first transistor Q1 existing in the off state (OFF) continuously maintains the contact point b3 on. .

In this case, the second broadcast audio is input by processing the first broadcast audio signal of the second broadcast audio signal selector 32 instead of the first broadcast audio signal of the first broadcast audio signal selector 30 through the fifth switch SW5. Generating a second voice signal for the signal is transmitted to the television receiver through the sixth switch SW6 to output a voice signal corresponding to the mother screen.

Secondly, if a high logic video control signal is applied from the microcomputer to the line 4 while the signals applied from the first to seventh switches SW1-SW7 and the microcomputer are low, the high logic on the line 4 is applied. The fourth switch SW4 turns on the contact b1 by the video control signal in the state.

The video signal reproducing unit 11 reproduces the video signal on the video tape and outputs the reproduced video signal to the second automatic gain adjusting circuit 21. At this time, the second automatic gain adjusting circuit 21 adjusts the gain of the reproduced video signal. Constantly adjusted to output to the first input terminal (F1) of the PIP screen driver 40 through the fourth switch (SW4).

Meanwhile, the second broadcast video signal selector 12 also outputs the second broadcast video signal of any second channel to be tuned among the broadcast video signals to the third automatic gain control circuit 22, wherein the third automatic gain control circuit ( 22 also outputs the second broadcast video signal of the second broadcast video signal selector 12 to the second input terminal S1 of the PIP screen driver 40 by constantly adjusting the input gain.

At this time, the PIP screen configuration unit 40 in the initial state inputs the reproduction video signal applied to the first input terminal F1 to generate a single screen video signal through the buffer circuit 60 through the luminance signal processing unit 70. And the color signal processor 80 outputs a luminance signal by processing a video signal which is a single screen of the PIP screen configuration unit 40 input through the buffer circuit 60. And a color signal processing unit 80 for inputting a video signal which is a single screen of the PIP screen configuration unit 40 through the buffer circuit 60, also processes the video signal and outputs the color signal to the generation television receiver. Display the screen for the signal.

On the other hand, the sixth switch SW6 applies an emitter and a collector of the first transistor Q1 operating in an ON state by applying a low logic PIP screen control signal to the base on the initial line 2. The sixth switch SW6 maintains the contact a3 ON in the initial state instead of the contact b3 in the initial state by the video control signal of the high logic state on the line 4.

At this time, the audio signal reproducing unit 31 reproduces the audio signal on the videotape, generates a reproducing audio signal, outputs the reproducing audio signal processing unit 50, and inputs the reproducing audio signal of the reproducing audio signal reproducing unit 30. The audio signal processor 50 processes the reproduced audio signal and outputs the first audio signal to the television receiver through the sixth switch SW6 having the generation contact a3 ON.

At this time, when the viewer operates the first switch SW1 to search for the program of the second channel while watching the screen and audio signal of the playback video and audio signal through the television receiver, the first switch SW1 is connected to the first power source ( Vcc) generates a PIP screen configuration control signal in a high logic state on the line 1 and applies it to the first control input terminal FCI of the PIP screen configuration section 40 via a resistor R1.

The PIP screen configuration unit 40 which inputs the PIP screen configuration control signal in the high logic state of the first switch SW1 to the first control input terminal FCI controls the third automatic gain by the PIP screen configuration control signal. The second broadcast video signal applied from the circuit 22 to the second input terminal SI is input to the first input terminal F2 via the fourth switch SW4 from the second automatic gain adjusting circuit 20. The video signal of the PIP screen having the second broadcast video signal as its own screen with the reproduction video signal inputted as a mother screen is outputted to the luminance signal processing unit 70 and the color signal processing unit 80 via the generation buffer circuit 60. do.

The luminance signal processing unit 70 for inputting a video signal of the PIP screen configuration unit 40 which is a PIP screen through the buffer circuit 60 processes the video signal of the PIP screen and outputs the video signal to a television receiver. The color signal processing unit 80 for inputting the video signal of the PIP screen configuration unit 40, which is the PIP screen, also processes the video signal, which is the PIP screen, and outputs the color signal to the television receiver. The PIP screen in which the signal is the mother screen and the second broadcast video signal is the child screen is displayed.

At this time, the viewer wants to watch the PIP screen composed of the reproduction video signal and the second broadcast video signal of the mother screen through the television receiver, and to watch the second broadcast video signal displayed on the mother screen as the mother screen. When the second switch SW2 is turned on by operating the second switch SW2, the second switch SW2 is a high logic PIP screen configuration control signal on the line 1, and the high switch PIP screen control signal on the line 2 is applied. Occurs in

Then, the PIP screen configuration unit 40 inputs the PIP screen control signal in the high logic state on the line 1 to the second control input terminal SCI to display the mother screen constituted by the PIP screen control signal. By outputting the video signal of the PIP screen having the mother screen as the mother screen to the luminance signal processing unit 70 and the color signal processing unit 80 via the generation buffer circuit 60 to the luminance signal processing unit 70 and the color signal processing unit 80. The video signal of the PIP screen having the inverse of the child screen and the mother screen is processed to output the luminance signal and the color signal to the generated television receiver to be displayed on the television receiver. In this case, the displayed PIP screen displays a screen in which the playback video signal is the child screen and the second broadcast video signal is the mother screen.

On the other hand, the fifth switch SW5 inputs the PIP screen control signal in the high logic state on the line 1 through the resistor R5 through the second transistor Q2 and the third transistor Q3, which serve as a buffer. While the high logic state of the PIP screen control signal is turned on (ON) instead of the contact point (b2) of the initial state to transmit the second broadcast audio signal to the selected broadcast audio signal processor 51, the sixth The switch SW6 is applied instead of the contact point a3 by the output of the low logic state of the first transistor Q1 which is applied to the base by applying the PIP screen control signal of the high logic state on the line 2 to the OFF state. The contact b3 is turned ON.

At this time, the second broadcast audio signal of the second broadcast audio signal selector 32 is input through the fifth switch SW5 to generate a second audio signal for the second broadcast audio signal. By transmitting to the television receiver through the audio signal corresponding to the mother screen is output.

In the first and second operation descriptions, when the PIP screen configuration unit 40 generates and outputs a video signal for the PIP screen, that is, when the first switch SW1 is ON, the viewer occupies a part of the mother screen. When the third switch SW3 is pushed in order to move the magnetic screen to the left or right or up and down, the third switch SW3 is turned on and off every time it is pressed, so that the positive magnetic screen is a positive single pulse. When the movement control signal is output to the third control input terminal TC2 of the generated PIP screen configuration unit 40, the PIP screen configuration unit 40 moves the child screen when the control screen signal having the positive single pulse is input. Whenever the control signal is applied, the video signal of the PIP screen is moved from the mother screen to the upper left, from the upper left to the lower left, from the lower left to the lower (right), and from the lower right to the upper right. Occurs.

Third, look at the operation during recording.

The second audio signal for the second broadcast video signal and the second broadcast audio signal when the second broadcast video signal is the mother screen in the first operation description state, that is, when the sixth switch SW6 keeps the contact point b3 on. When the recording key is pressed to record the signal on the videotape, the videotape recording unit 90 inputs and records the second broadcast video signal output from the third automatic gain adjusting circuit 22.

The audio recording unit 100 also records a second audio signal for the second broadcast audio signal output from the broadcast video signal processing unit 51. Here, the detailed operation process will be described.

When the recording control signal in the high logic state from the microcomputer is applied to the base of the transistor Q4 of the fourth transistor Q4 and the fifth transistor Q5 operating as a buffer, the fourth transistor Q4 and the fifth transistor Q5. ) Is turned on and outputs a high logic recording control signal input to the base of the fourth transistor Q4 from the collector of the fifth transistor Q5 to the fifth switch SW5 through the resistor R5.

The fifth switch SW5 applied through the resistor R5 by the recording control signal in the high logic state selects the second broadcast audio signal of the second broadcast audio signal selector 32 by turning on the contact point a2. The broadcast audio signal processor 51 inputs and outputs the broadcast audio signal processor 51 to process the second broadcast audio signal of the second broadcast audio signal selector 32 through the fifth switch SW5. By outputting the second audio signal to the generated audio recording unit 100, a second audio signal for the second broadcast audio signal is output on the video tape.

Fourth, we will look at the operation of multi-function videotape at high speed. In multifunction, a high mute control signal is applied from the microcomputer to the input terminal of the diode D ₃ .

When a single screen playback video signal in which both the first switch SW1 and the second switch SW3 are OFF are displayed, the first switch SW1 generates a PIP screen configuration control signal in a low logic state. The resistor R1 is applied to the collector of the seventh transistor Q7 through the resistor R1, and the second switch SW2 also transmits the PIP screen control signal of the low logic state through the line 2 to the sixth and eighth transistors. Is applied to the bases of (Q6 and Q8). Then, the sixth transistor Q6 is turned off while the eighth transistor Q8 is turned on so that the mute control signal of the first power supply Vcc and the high logic state is provided with a resistor R6 and two diodes D2 and D3 and a transistor. The seventh switch SW7 is turned on via the emitter and collector at Q8. At this time, the first audio signal processed by the reproduced audio signal of the reproduced audio signal processor 50 is muted.

When the playback video signal having the first switch SW1 is on and the second switch SW2 is off is the mother screen, the second broadcast video signal is the child screen, the first switch SW1 is a PIP screen having a high logic state. The configuration control signal is applied to the collector of the first transistor Q7 and the first control input terminal FCI of the PIP screen configuration unit 40 through the resistor R1 through the generation line 1 and to the second switch SW2. Is applied to the bases of the sixth and eighth transistors Q6 and Q8 through the generation line 2.

Then, the sixth transistor Q6 is turned off, and the seventh and eighth transistors Q7 and Q8 are turned on so that the seventh transistor Q7 mutes the PIP screen configuration control signal of the high logic state, and the eighth transistor Q8. Is applied to the seventh switch SW7 through the emitter and the collector by applying the first power supply Vcc applied to the diode D3 through the mute control signal and the resistor R6 and the diode D2 in the high logic state. 7 Turn on the switch.

At this time, the PIP screen configuration unit 40 inputs a low logic PIP screen configuration control signal by the seventh transistor Q7 so as not to output a single screen video signal for a playback video signal to construct a PIP screen. The first audio signal of the reproduction audio signal processor 50 is also muted by the seventh switch SW7.

In addition, when the playback video signal in which both the first switch SW1 and the second switch SW2 are on is the mother screen, and the second broadcast video signal is the mother screen, the first switch SW1 has a high logic PIP screen configuration. When the control signal is applied to the collector of the seventh transistor Q7 and the first control input terminal FCI of the PIP screen forming unit 40 through the resistor R1 through the generation line 1, the second switch SW2 is applied. The PIP screen control signal of the high logic state is applied to the second control input terminal SCI of the PIP screen configuration unit 40 and the bases of the sixth and eighth transistors Q6 and Q8 through the generation line 2. .

At this time, the sixth transistor Q6 is turned on and the seventh and eighth transistors Q7 and Q8 are turned off, so that the PIP screen configuration unit 40 continues to receive the second broadcast video signal regardless of the high logic mute control signal. A video signal, which is a PIP screen having a mother screen and a playback video signal as its own screen, is output to the luminance signal processing unit 70 and the color signal processing unit 80 through the generation buffer circuit 60.

Then, the luminance signal processor 70 processes the video signal to transmit the luminance signal to the generated television receiver, and the color signal processor 80 also processes the video signal to output the color signal to the generated television receiver to display the PIP screen.

As described above, the present invention provides an advantage of searching for a broadcast program of another channel while watching a broadcast program of one channel or a program on a video tape, and a video tape of a broadcast program of another channel while watching a broadcast program of one channel. There is an advantage to record on.

Claims (1)

A first broadcast video selecting unit 10 for selecting a broadcast video signal, a video signal reproducing unit 11 for reproducing a video signal on a videotape, and a first broadcast audio signal selecting unit 30 for selecting a broadcast audio signal And an audio signal reproducing unit 31 for reproducing the audio signal on the videotape, and a reproducing audio signal processing unit 50 for processing the reproducing audio signal of the audio signal reproducing unit 31 to generate a first audio signal. In a videotape recorder, a second broadcast video selector 12 for selecting a broadcast video signal, and first and second broadcast video signals of the first and second broadcast video selectors 10 and 12; A first-third automatic gain adjustment circuit 20-22 for constantly adjusting the gain of the reproduced video signal of the video signal reproducing section 11, and a gain-adjusted third gain of the third automatic gain adjustment circuit 22; 2 Broadcast video signals to video tape The first recording video signal of the first broadcasting video signal selecting unit 10 or the reproduction video signal of the video signal reproducing unit 11, or a video signal of a single screen; A PIP screen configuration unit constituting a video signal of a PIP screen in which the second broadcast video signal of the second broadcast video signal selection unit 12 is the child screen or the reverse of the above, with the broadcast video signal or the playback video signal as the parent screen; 40 and a luminance signal processing unit 70 for generating a luminance signal by processing the video signal of the PIP screen forming unit 40 through the buffer circuit 60, and the video signal of the PIP screen forming unit 40. A color signal processor 80 for inputting a color signal through the buffer circuit 60 to generate a color signal, a second broadcast audio signal selector 32 for selecting a broadcast audio signal, and the first and second broadcast audio signal selectors First and second broadcasts (10 and 12) A broadcast audio signal processor 51 for processing a false signal to generate a second voice signal, an audio recorder 100 for recording the first audio signal of the broadcast audio signal processor 51 on a video tape, and a microphone PIP screen configuration of the gain-adjusted first broadcast video signal input from the first automatic gain control circuit 20 or the gain-adjusted playback video signal input from the second automatic gain control circuit 21 by the video control signal. Controls the video signal selection transmission means to be transmitted to the unit 40, and a PIP screen configuration in which the first broadcast video signal or the playback video signal being watched by the viewer's operation is used as the mother screen and the second broadcast video signal is the child screen. PIP screen configuration control means for generating a PIP screen configuration control signal and a PI generated by the PIP screen configuration control means by performing a switching operation according to the viewer's operation. P screen configuration control signal PIP screen control means for generating the PIP screen control signal for changing the mother screen to the mother screen of the PIP screen and the voice screen according to the mother screen, and the viewer Sub-screen moving control means for generating a pulse sub-screen moving control signal for sequentially moving the sub-screen position up, down, left and right in the PIP screen by switching operation, recording control signal applied from the microcomputer and the PIP screen The first broadcast audio signal of the first broadcast audio signal selector 30 or the second broadcast audio signal of the second broadcast audio signal selector 32 are selected by the PIP screen control signal generated by the control means. Audio signal selection transmission means for transmitting to the processor 51, PIP screen control signal generated by the PIP screen control means and a video applied from the microcomputer A voice signal selection transmission means for selecting the first audio signal of the reproduction audio signal processor 50 or the second audio signal of the broadcast audio signal processor 51 and transmitting the selected audio signal to the television receiver according to the control signal; The first audio signal of the playback audio signal processor 50 and the PIP screen configuration control signal generated by the PIP screen control means are muted by the PIP screen control signal generated by the control signal and the mute control signal applied from the microcomputer. Instead, a picture-in-picture broadcast picture composition circuit of a videotape recorder, characterized in that it comprises a mute means for forming a single screen.

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