KR19980023264A - Television receiver with automatic operation mode switching - Google Patents

Abstract

According to the present invention, when a video signal is inputted from a VCR while watching television on a television receiver having a sub picture function, the present invention has an automatic operation mode switching function for switching to the housewife picture simultaneous output mode and outputting the video signal to the sub picture. A television receiver comprising: a television receiver having a sub picture function; A video signal detecting means for outputting a result signal when a video signal is detected, a switching means for switching a broadcast signal or a video signal, and a switching means when the result signal is input from the video signal detecting means while watching television. And controlling means for outputting the current viewing channel to the main screen by controlling the switching and output control of the video signal to the sub-screen.

Description

Television receiver with automatic operation mode switching

The present invention relates to a television receiver having a sub picture function. In particular, when a video signal is input from a VCR while watching a television, the operation mode automatically switches to the main picture display mode and outputs the video signal to the sub picture. A television receiver with a switching function.

1 is a block diagram showing a configuration of a television having a sub picture function which is generally used.

In the drawing, reference numeral 1 denotes an antenna for receiving an airwave broadcast, 2 denotes a first tuner for executing a broadcast station for a main picture, and 3 denotes an amplified intermediate frequency (IF) signal output from the first tuner 2. The first IF amplifier section to output.

In addition, reference numeral 4 denotes, for example, a surface acoustic wave filter (SAW FILTER) for separating the IF signal output from the first IF amplifier 3 into an image intermediate frequency (PIF) signal and an audio intermediate frequency (SIF). 1 is a first P / S separator, 5 is a first voice detector for detecting a voice signal from the voice intermediate frequency signal output from the first P / S separator, and 6 is the first P / S detector 4. A first image detector detects an image signal from an image intermediate frequency signal output from the video signal.

On the other hand, reference numeral 7 denotes a second tuner for executing broadcast tuning for the sub picture, and 8 denotes a second IF amplifier for amplifying an intermediate frequency (IF) signal output from the second tuner 7.

Further, reference numeral 9 denotes a second P / S composed of, for example, a surface acoustic wave filter for separating the IF signal output from the second IF amplifier 8 into an image intermediate frequency (PIF) signal and an audio intermediate frequency (SIF). A second voice detector for detecting a voice signal from the voice intermediate frequency signal outputted from the second P / S separator 9, and 11 a second voice detector in the second P / S separator 9 A second image detector detects an image signal from an output image intermediate frequency signal.

In addition, reference numeral 12 denotes a switching unit, which outputs signals from the first audio and video detectors 5 and 6 and the second audio and video detectors 10 and 10 according to a control signal of the microprocessor 20. 11) the output signal from 11) is switched to selectively output video and audio signals corresponding to the main screen and the sub-screen.

In addition, reference numeral 13 denotes a first voice processor for processing the voice signal output from the switching unit 12, and 14 denotes amplified voice signal processed by the first voice processor 13 to a predetermined level and output to the speaker. The first voice amplifier 15 is a second voice processor for processing the voice signal output from the switching unit 12 and outputting the voice signal to the headphone jack.

Further, reference numeral 16 denotes a color difference signal (RY, BY, GY) and luminance of R (Red), G (Green) and B (Blue) signals corresponding to the video signal output from the switching unit 12. An image processor which outputs a signal (-Y), and 17 is a CRT driver for driving the CRT based on the color difference signal and the luminance signal output from the image processor 16. FIG.

Further, reference numeral 18 denotes a remote controller for selecting each function of the television, which is equipped with a predetermined key for selecting a main / sub picture simultaneous output function, and 19 is transmitted from the remote controller 18. Receiving unit for receiving an infrared signal to be converted into an electrical predetermined code signal, 20 is a microprocessor as a control unit for controlling the overall operation of the device based on the code signal output from the receiving unit 19, 21 is a VCR (Video An external AV device such as a Cassette Recorder or a laser disc player 22 is a channel memory in which predetermined channel data is stored.

That is, when the television receiver having the above-described configuration selects the main / sub picture simultaneous output function using the remote control device 18 and then selects a channel for the sub picture, the microprocessor 20 determines the first tuner ( 2) outputs and reproduces the broadcasting signal of the channel currently being watched through the main screen, and tunes the second tuner 7 based on the channel data for the channel selection and inputs it through the tuner 7. It controls to output and reproduce the broadcast signal to the sub-screen.

In this case, the microprocessor 20 controls the image processor 16 to perform main / sub picture processing on each main / sub picture signal input through the main video signal input terminal and the sub video signal input terminal to the CRT. Will print.

However, in spite of the advancement of the functions of the television as described above, when the viewer wants to watch the videotape through the sub-screen along with the broadcast signal currently being played, the viewer first inserts the videotape and then the remote control apparatus. By pressing a predetermined key for selecting the main / sub picture simultaneous output function of (18), and then pressing the play key (PLAY) for playing the video tape, the broadcast signal of the main picture and the video signal of the sub picture can be simultaneously viewed. As described above, in order to simultaneously watch the video signal on the sub-screen, it is necessary to execute several key operations.

Accordingly, the present invention has been made in view of the above circumstances, and when a video signal is input from the VCR while watching television, the operation mode automatically switches to the housewife picture simultaneous output mode and outputs the video signal to the sub picture. The purpose is to provide a television receiver with a switching function.

1 is a block diagram showing the configuration of a television having a sub picture function generally used.

Fig. 2 is a block diagram showing the main components of a television with an automatic operation mode switching function according to an embodiment of the present invention.

3 is a flow chart for explaining the operation of the device of the configuration of FIG.

4 is a view showing the video signal detector 32 of FIG.

* Explanation of symbols for main parts of the drawings

1: antenna 2: first tuner

3: 1st IF amplifier part 4: 1st P / S separation part

5: first voice detector 6: first image detector

7: 2nd tuner 8: 1st IF amplifier part

9: second P / S separator 10: second voice detector

11 second image detector 12 switching unit

13: first voice processing unit 14: voice amplifier

15: second audio processing unit 16: image processing unit

17: CRT drive unit 18: remote control device

19: receiver 20, 30: microprocessor

21: External AV device 22: Channel memory

31: mode storage unit 32: video signal detection unit

33: PIP mode storage unit

A television receiver having an automatic operation mode switching function according to the present invention for achieving the above object comprises a television receiver having a sub picture function; A video signal detecting means for outputting a result signal when a video signal is detected, a switching means for switching a broadcast signal or a video signal, and a switching means when the result signal is input from the video signal detecting means while watching television. And controlling means for outputting the current viewing channel to the main screen by controlling the switching and output control of the video signal to the sub-screen.

That is, according to the present invention having the above-described configuration, when a video signal is input from the VCR while watching television, the video signal can be automatically executed by sub-screen processing so that the broadcast signal and the video signal can be simultaneously viewed simply. .

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing the main components of a television having an automatic operation mode switching function according to an embodiment of the present invention, in which the same parts as in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the drawing, reference numeral 31 denotes a mode storage unit for storing an operation mode state of a main / sub picture mode for simultaneously outputting and reproducing a main / sub picture for a broadcast signal according to a predetermined control signal with a predetermined flag. 32 is, for example, a video signal detector for determining whether or not a video signal is input from the VCR and outputting the resultant signal. PIP mode storage unit for storing the operation mode state of the screen video mode with a predetermined flag.

Reference numeral 30 denotes a microprocessor as a control unit for controlling the overall apparatus.

Next, the operation of the device having the configuration of FIG. 2 will be described using the flowchart of FIG. 3.

When the user turns on the television (step ST301), the microprocessor 30 tunes and controls the first tuner 2 to tune a broadcast channel, and the broadcast signal is processed by the image processor 16 to process a predetermined image. And output to the CRT (ST 302).

4 is a diagram illustrating the configuration of the video signal detector 32. When the video signal is not input from the VCR, the voltage applied to the resistor R4 is not present, and thus the transistor TR is turned off. Since the signal output from the collector terminal of the transistor TR outputs all voltages except the drop of the resistor R1, for example, a high level signal is applied to the microprocessor 30. do.

In addition, when the video signal is input from the VCR, the voltage dropped through the resistor R4 is charged through the capacitor C, but when the energization voltage of the transistor TR exceeds, the transistor TR is turned on to turn on the transistor TR. The low signal is applied to the microprocessor 30 from the collector end of.

After the step ST302, when the microprocessor 30 receives a predetermined high signal corresponding to the video signal input from the video signal detector 32 (step ST303), the microprocessor 30 determines the state of the operation mode of the mode storage unit 31. In addition to setting the main / sub picture mode, the operation mode of the PIP mode storage unit 33 is set to the video mode (steps ST304 and 305).

In this case, the microprocessor 30 switches the switching unit 12 to the broadcast signal input through the first tuner 2 to output control to the MAIN input terminal of the image processing unit 16, and the switching. The control unit 12 controls switching to block the broadcast signal input through the second tuner 7 and output the video signal input from the VCR to the PIP input terminal of the image processor 16.

In addition, the microprocessor 30 controls the image processing operation of the image processor 16. The image processor 16 controls the broadcast signal of the main picture and the video signal of the sub picture according to a predetermined control signal. PIP processing is performed and output to the CRT (step ST306).

That is, according to the above embodiment, when a video signal is input from the VCR while watching television, the video signal can be automatically executed by sub-screen processing so that the broadcast signal and the video signal can be simultaneously simultaneously viewed.

In addition, this invention is not limited to the said Example, A deformation | transformation is possible in the range which does not deviate from the technical summary of this invention.

As described above, according to the present invention, when a video signal is input from the VCR in a television receiver having a sub picture function, in particular, while watching a television, the video signal is output to the sub picture by switching to the housewife picture simultaneous output mode. A television receiver with an automatic operation mode switching function can be realized.

Claims (1)

A television receiver having a sub picture function; Video signal detection means for outputting a result signal when a video signal is detected; Switching means for switching switching of a broadcast signal or a video signal; And a control means for switching the switching means to output the current viewing channel to the main screen and to control the output of the video signal to the sub-screen when the result signal is input from the video signal detecting means while watching television. Television receiver with operation mode automatic change over function.