KR19990016722A - Video phone automatic connection system - Google Patents

Abstract

The present invention relates to a television connected to a video phone to perform a video phone mode, including a speaker and earphone for outputting a voice signal, and a CRT for outputting a video signal, and detecting a call ring signal output from the video phone. An operation control signal for selectively outputting a call ring signal detection unit for outputting a corresponding signal, and an image signal output from the television and the video phone by an input operation control signal and inputting an audio signal output from the television and the video phone A switching unit for selectively outputting to the speaker or earphone, a PIP processing unit for outputting a plurality of video signals outputted from the switching unit through a predetermined processing process on a CRT screen by an input operation control signal, and a call ring On the basis of the signal output from the signal detector When there is a call ring signal input by an automatic connection system of a video phone including a switching unit and a microprocessor for outputting an operation control signal to the PIP IC, the audio signal of the television is output through a speaker and the audio signal of the video phone is The output through the earphone and the video signal of the television is output to the entire screen, and the video signal of the video phone is output to the predetermined portion of the corner of the screen has the effect of improving the user's satisfaction with using the video phone.

Description

Video phone automatic connection system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television having a video phone function. In particular, when there is a call ring signal input from a video phone while watching a television, the video phone is automatically input from the video phone using a picture in picture (PIP) function of the television. An automatic connection system of a video phone for outputting a video signal and for outputting an audio signal output from the video phone to a predetermined audio output means.

1 is a block diagram showing a typical PIP system television.

In Fig. 1, reference numeral 1 denotes an antenna, and 2a to 2b denote tuners for selecting a broadcast signal of a channel selected by a preset voltage input from a wireless broadcast signal received through the antenna 1.

5a represents a P / S separator for separating an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF from an intermediate frequency signal output from the tuner 2a, and 5b represents an intermediate output from the tuner 2b. A P / S separation unit for separating the video intermediate frequency signal (PIF) and the audio intermediate frequency signal (SIF) from the frequency signal.

6a to 6b indicate a voice detector for detecting a voice signal from the voice intermediate frequency signal SIF output from the P / S separators 5a and 5b, and 7a to 7b denote the P / S separator 5a. And an image detector for detecting an image signal from the image intermediate frequency signal PIF output from 5b).

In addition, reference numeral 8 denotes a remote controller device which allows a viewer to select a desired channel or to select each mode of the television, that is, a PIP mode, and 9 denotes an electrical code for an infrared signal from the remote controller device 8. 10 shows a channel memory in which predetermined channel data is stored, and 11 shows a microprocessor for controlling the entire system in accordance with an input signal from the remote control device 8.

In addition, reference numeral 12 denotes a screen display for overlapping and outputting a character or a picture or the like on a screen on which a broadcast signal is output separately from the broadcast signal according to the control signal of the microprocessor 11 (On Screen Display). Hereinafter, referred to as OSD) device.

Reference numeral 14 serves to generate a PWM signal which is a channel tuning signal corresponding to the operation control signal input from the microprocessor 11.

On the other hand, reference numeral 20 selectively outputs the audio and video signals from the above-described audio detectors 6a and 6b and the image detectors 7a and 7b according to the switching signal from the microprocessor 11. The switching part is shown.

Although reference numeral 21 is not shown for the voice signal output from the switching unit 20, the base, treble, and volume according to the control signal from the microprocessor 11 is used. And a voice processing unit for executing voice processing such as the above, and 22 denotes a voice amplifying unit for amplifying the voice signal processed by the voice processing unit 21 and outputting it to the speaker or earphone.

Although reference numeral 23 is not shown with respect to the image signal output from the switching unit 20, the color, tint, and brightness are in accordance with a control signal from the microprocessor 11. ), And outputs R (Red), G (Green), and B (Blue) signals corresponding to the video signal.

The RGB signal output from the image processor 23 is mixed with the RGB and OSD blanking signals, which are the output signals of the OSD generator 12 described above, in a mixer indicated by reference numeral 24.

Reference numeral 25 denotes a PIP IC for outputting a plurality of image signals on the CRT screen or outputting only one image signal based on the RGB signal output from the mixer 24, and 26 denotes a PIP IC 25. A CRT driving unit for driving a CRT based on a signal output from the.

In the general television configured as described above, when the viewer selects the PIP mode using the remote controller device 8, the microprocessor 11 controls the switching unit 20 to control the plurality of tuners 2a and 2b. By selecting the selected video signal and the audio signal, the plurality of audio signals are output through the speaker and the earphone and the plurality of video signals are output to the entire screen and the corner portion of the television, respectively.

Referring to Figure 2 attached to the configuration and function of a general video phone combined television as follows. In this embodiment, the same parts as those in FIG. 1 are omitted to avoid duplication of description.

In FIG. 2, reference numeral 2 denotes a tuner for selecting a broadcast signal of a channel selected by a preset voltage input from a wireless broadcast signal received through the antenna 1, and 5 denotes a middle outputted from the tuner 2. A P / S separation unit for separating the video intermediate frequency signal (PIF) and the audio intermediate frequency signal (SIF) from the frequency signal.

6 denotes an audio detector for detecting an audio signal from an audio intermediate frequency signal SIF output from the P / S separation unit 5, and 7 represents an intermediate image output from the P / S separation unit 5; An image detector detects an image signal from a frequency signal PIF.

Reference numeral 8 denotes a remote control device capable of selecting a channel desired by the viewer or selecting each mode of the television, that is, a television / video phone mode, and 11 denotes an input signal from the remote control device 8. Accordingly represents a microprocessor that controls the entire system.

On the other hand, reference numeral 19 denotes a video phone, 20 denotes audio and video signals and video from the above-described voice detector 6 and image detector 7 according to the switching signal from the microprocessor 11. A switching unit for selectively outputting audio and video signals from the phone 19 is shown.

Although reference numeral 23 is not shown for the image signal output from the switching unit 20, color, tint, brightness, etc. are processed according to a control signal from the microprocessor 11, An image processor for outputting corresponding R, G, and B signals is shown.

In addition, reference numeral 21 denotes a voice processor for processing a voice signal output from the switching unit 20 by a predetermined process, and 22 denotes an amplified voice signal processed by the voice processor 21 and outputs to a speaker. The voice amplification part is shown.

In the general television configured as described above, when the viewer selects the television / video phone mode by using the remote control device 8, the microprocessor 11 controls the switching unit 20 so that the voice detector 6 ) By selectively outputting the video and audio signals from the video detector 7 and the video and audio signals from the video phone 19 to the video processor 23 and the audio processor 21. Can watch the video and audio through the CRT and speakers of the television.

In the case of using the conventional video phone as described above, when the user receives a call, the user must recognize a call ring signal and then select a predetermined key on the remote control to switch the television to the video phone mode. If the call ring signal output level is very large or almost equal to '0', the user may not recognize the call ring signal and thus cannot call.

In addition, when the user wants to operate the video phone normally, it is inconvenient to select the predetermined key of the remote control to switch the television to the video phone mode. When the television is switched to the video phone mode as described above, The video is removed, and only the video input through the video phone is output, and only the audio signal input through the video phone is output through the speaker, which causes problems such as disconnection of the contents of the television program being watched.

Prior art has been proposed in the Republic of Korea Patent Publication No. 97-14196 to solve the problem that the user does not recognize the ring ring signal of the above many problems.

The prior art for solving the problem of the call ring signal recognition relates to a method and apparatus for displaying a subtitle on a television screen by an external signal, and a Zener unit for converting the voltage level introduced from the telephone line terminal portion of the television to a predetermined voltage; On-screen display on the television screen by mixing the on-screen display with the OSD IC unit for generating the subtitle data informing the reception of the telephone ring by the voltage change generated in the Zener unit and the subtitle data generated by the OSD IC unit and the television broadcast video signal The on-screen display by the automatic detection of the telephone bell signal characterized in that it comprises a video signal processor and a control unit for controlling the OSD IC by detecting the variable voltage level output from the zener unit Automatically detects your telephone ringing signal Lowering the audio level to provide a feature that the phone can not receive calls conveniently to be displayed subtitles second came on the television screen.

However, the above-described prior art has the advantage that the user can easily recognize the incoming call while watching television, but since the scope of application is limited to the voice call, many of the problems described above that occur in the video phone combined television It cannot be solved.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is that if there is a call ring signal input from a video phone while watching a television, it is automatically input from the video phone using the PIP (Picture in picture) function of the television. The present invention provides an automatic connection system for a video phone that outputs an image signal and outputs an audio signal output from the video phone to a predetermined audio output means.

1 is a block diagram showing a typical PIP system television.

2 is a block diagram showing a television having a general video phone function;

3 is a block diagram showing a schematic configuration of a television including an automatic connection system of a video phone according to the present invention;

* Explanation of symbols for the main parts of the drawings

111: microprocessor 119: video phone

120: switching unit 125: PIP IC

130: call ring signal detection unit

A feature of the present invention for achieving the above object is a video phone mode connected to a video phone to perform a video phone mode, including a speaker and earphone for outputting an audio signal, and a CRT for outputting a video signal from a video phone, A call ring signal detection unit for detecting an output ring signal and outputting a corresponding signal; and selectively outputting a video signal output from a television and a video phone by an input operation control signal and outputting from the television and a video phone A switching unit for selectively outputting an audio signal to the speaker or earphone according to an input operation control signal, and a plurality of image signals output from the switching unit according to an input operation control signal and undergoing a predetermined process on a CRT screen A PIP processing unit for outputting the signal to the call ring signal; And a signal output from the reference is to include a microprocessor for outputting an operation control signal to the switching unit and PIP IC.

An additional feature of the present invention is that the voice signal of the television is output through the speaker, and the voice signal of the video phone is output through the earphone.

Another additional feature of the present invention is that the PIP processing unit outputs the video signal of the television to the entire screen, and the video signal of the video phone to the predetermined portion of the corner of the screen.

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

3 is a block diagram showing a schematic configuration of a television including an automatic connection system of a video phone according to the present invention.

The automatic connection system of the video phone detects a call ring signal output from the video phone 119 and outputs a signal corresponding to the call ring signal detector 130, a voice detector 32, and a detector video detector. A switching unit 120 for selectively outputting a video signal and an audio signal of the television output from 134 and a video signal and an audio signal output from the video phone 119 according to an input operation control signal; A voice processor 121 for processing the voice signal output from the 120, a voice amplifier 122 for amplifying the voice signal processed by the voice processor 121 and output to the speaker or earphone, and the switching unit 120 The image processing unit 123 for processing the image signal output from the) and the mixer 124 for mixing and output the signal output from the image processing unit 123 with the output signal of the OSD generator 112 A PIP IC 125 for outputting a plurality of image signals on a CRT screen or outputting only one image signal based on an RGB signal output from the mixer 124 by an input operation control signal; The CRT driver 126 for driving the CRT based on the signal output from the PIP IC 125 and the switching unit based on the signals output from the call ring signal detector 130 and the remote controller 108. And a microprocessor 111 for outputting an operation control signal to the PIP IC 125 and controlling the operation of the various devices constituting the television.

The operation of the microprocessor is described in more detail below.

The call ring signal detector 130 detects when a call ring signal is output from the video phone 119 by requesting a call connection from an external user and outputs a corresponding signal to the microprocessor 111. .

The microprocessor 111 determines the signal input from the call ring signal detection unit 130 during the operation of the television, and determines that there is a call ring signal input, so that the switching unit 120 and the PIP IC 125 perform the corresponding operation. Output a control signal.

The switching unit 120 simultaneously selects the video signal and the audio signal output from the video phone 119 and the video signal and the audio signal of the television by the operation control signal output from the microprocessor 111, and the microprocessor 111 If the operation control signal is not outputted, the video signal and the audio signal of the television are selected.

As described above, after the plurality of voice signals selected by the switching unit 120 pass through the voice processor 121 and the voice amplifier 122, the voice signals of the television are continuously output through the speaker and output from the video phone 119. The voice signal is output through the earphone.

In addition, the plurality of image signals selected by the switching unit 120 may be processed by the image processing unit 123 in a predetermined processing process to the PIP IC 125 whose operation is controlled by an operation control signal output from the microprocessor 111. Thus, the television signal is output over the entire CRT screen, and the video signal output from the video phone 119 is output within a predetermined range of the corner of the CRT screen.

Therefore, when another user calls a videophone while watching television, the present invention automatically switches the television to the videophone reception mode and maintains the video signal and audio signal output of the television. .

According to the present invention operating as described above, when another user makes a phone call to the video phone while watching television, the video signal and audio signal outputted from the video phone are automatically switched to the video phone reception mode. It is possible to output through the predetermined output means of the video signal and audio signal output of the television can be maintained, so that disconnection of the program being watched is not generated, the user switches the television to the video phone mode It eliminates the need for key operation, and the television automatically switches to video phone mode even if the user does not recognize the bell signal output from the video phone due to other noises in the surroundings. Has the effect of improving.

Claims (3)

A television connected to a video phone to perform a video phone mode, including a speaker and earphone for outputting an audio signal, and a CRT for outputting a video signal, A call ring signal detector for detecting a call ring signal output from the video phone and outputting a signal corresponding thereto; Switching for selectively outputting the video signal output from the television and the video phone by the input operation control signal, and selectively outputting the audio signal output from the television and the video phone to the speaker or earphone according to the input operation control signal Wealth; A PIP processing unit for outputting a plurality of image signals outputted from the switching unit through a predetermined processing process on a CRT screen by an input operation control signal; And a microprocessor for outputting an operation control signal to the switching unit and the PIP IC based on the signal output from the call ring signal detection unit. The system of claim 1, wherein the audio signal of the television is output through a speaker and the audio signal of the video phone is output through an earphone. The system of claim 1, wherein the PIP processing unit outputs a video signal of a television to the entire screen, and outputs a video signal of a video phone to a predetermined portion of a corner of the screen.