KR100724593B1 - Video Phone of four lines way - Google Patents

Abstract

The present invention relates to a videophone, and more particularly, to a four-wire videophone that separates and transmits a video signal having a phase difference of 180 degrees through a connection line of an outer side and an inner side, and transmits other audio and other signals.

The present invention provides an external power supply unit for maintaining the Vcc provided from the inside at a constant voltage, an outer call unit for providing the call signal input from the outside, and a voice signal input from the outside and a voice signal transmitted from the inside. The outer voice hybrid unit for mixing, the outer signal mixing unit for mixing the voice signal transmitted from the outer voice hybrid unit and the call signal transmitted from the outer call unit and transmits to the inside, LED control unit for controlling the LED outside, from the outside An image input unit for separating and transmitting the captured image signal to the inside, an outer portion including a door opening and closing portion for performing a door opening and closing signal transmitted from the inside, an inner power supply for providing Vcc, and a call signal provided from the outside Call detection unit, call through the call signal detected from the call detection unit Micom unit for controlling the sound to be generated, the inner signal mixing unit for mixing the inner voice signal, the back tone signal and Vcc to the outside, the ring tone output unit for generating a call sound and output to the inner speaker under the control of the micom unit A back tone amplifying unit for amplifying a ring tone signal provided from the ring tone output unit into a back tone signal, a voice output unit for outputting a voice signal provided from the outside to the speaker and transmitting a voice signal input from the inside to the outside; The door opening and closing signal output unit for transmitting a, and the inner portion including an image output unit for receiving the input image signal separated from the outside to provide to the LCD module.

In the present invention, since the video signal is divided into 180 degrees phase difference between the image (+) and the image (-) and transmitted to the inside, the in-phase sound signal and the external noise signal are blocked and only the video signal having a phase difference of 180 degrees passes. It prevents the video noise from being generated and transfers the positive and negative video signals below 0.5Vpp, preventing the video signal from being diverted to the audio line. To provide the effect.

Video signal, Audio signal, First call signal, Recall signal, Backtone signal, 4-wire

Description

Video Phone of four lines way}

1 is a signal transmission state diagram in a conventional video phone connection line,

2 is a block diagram of an outer part of a videophone according to the present invention;

3 is a block diagram illustrating an inner part of a videophone according to the present invention;

4 is a signal transmission state diagram in a videophone connection line according to the present invention.

<Description of Symbols for Major Parts of Drawings>

200: outer portion 210: outer power portion

220: outer call unit 230: outer voice hybrid unit

240: outer signal mixing unit 250: LED control unit

260: Image input unit 270: Door opening and closing portion

300: inner portion 310: inner power portion

320: inner signal mixing unit 330: call detection unit

340: microcomputer unit 350: ring tone output unit

360: back tone amplifier 370: voice output unit

380: door open / close signal output unit 390: video output unit

The present invention relates to a videophone, and more particularly, to a four-wire videophone that separates and transmits a video signal having a phase difference of 180 degrees through a connection line of an outer side and an inner side, and transmits other audio and other signals.

On the other hand, the connection line for transmitting the signal between the inside and the outside is composed of a four-wire, Figure 1 is a diagram showing the state of the signal transmission in the four-wire connection line of the conventional videophone.

As shown, the first connection line supplies power, and the second connection line is a ground terminal.

The third connection line transmits audio, call, and door open / close signals, and the fourth line transmits an image signal photographed by an external camera.

However, there is a problem in that a video signal transmitted through the fourth connection line among the conventional connection lines between the inside and the outside is induced in the third connection line and occurs in the form of voice noise in the speaker of the camera and the monitor.

Therefore, in order to prevent the noise from occurring above, the output level of the video signal transmitted through the fourth connection line must be lowered. Accordingly, the image captured by the camera outside is difficult to be properly reproduced in the monitor provided inside.

In addition, when the length of the connection line between the camera outside and the monitor on the inside is 30 m or more (thickness 0.65 mm), the audio signal of the third connection line is induced to the fourth connection line, which causes noise in the form of a string in the image of the inner monitor. There is a problem.

Therefore, in order to prevent the noise of the string form as described above, the length of the connecting line between the camera outside and the monitor inside cannot be extended beyond 30m.

In addition, since the output level of the audio signal cannot be increased, the sensitivity of the voice is reduced and voice noise is generated in the camera and the monitor speaker outside.

The present invention has been made to solve the above problems, and is separated into a (+), (-) video signal having a phase difference of 180 degrees through a third connection line and a fourth connection line on the inner side and the outer side to transmit the image signal. It is an object of the present invention to provide a four-wire videophone for preventing noise caused by abandonment between voice signals.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. In addition, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The present invention for achieving the above object, the external power supply for maintaining the Vcc provided from the inside at a constant voltage, the external caller for providing the ringing sound input from the outside, the voice signal input from the outside and transmitted from the inside An external voice hybrid unit for mutually processing a voice signal, an external signal mixer for mixing the voice signal transmitted from the external voice hybrid unit and the ring tone signal transmitted from the external call unit, and transmitting them to the inside, and controlling the external LEDs. It consists of an LED controller for controlling, an image input unit for transmitting the image signal photographed from the outside, the outer portion including a door opening and closing portion for performing the door opening and closing signal transmitted from the inside.

The present invention also provides an internal power supply unit for providing a Vcc, a call detection unit for detecting a ring tone signal provided from the outside, a micom unit for controlling a call sound to be generated through the call signal detected from the call detection unit, an inner voice signal, a back tone signal And an inner signal mixing unit for mixing and transmitting Vcc to the outside, a ringing tone output unit for generating a ringing tone under the control of the microcomputer unit, and outputting the ringing tone to the inner speaker, and for amplifying a ringing tone signal provided from the ringing tone output unit to a back tone signal. A back tone amplifying unit, a voice output unit for outputting a voice signal provided from the outside to the speaker and transmitting the voice signal input from the inside, a door open / close signal output unit for transmitting a door open / close signal, separated from the outside and input Zero for receiving video signals and providing them to the LCD module An output including a medial side.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

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

2 is a view showing the outer configuration of the video phone according to the invention.

As shown, the outer portion is the outer power supply unit 210, outer calling unit 220, outer voice hybrid unit 230, outer signal mixing unit 240, LED control unit 250, image input unit 260, door opening and closing unit 270.

The outer power supply 210 is configured to generate a voltage of + 5V or -5V at Vcc provided from the inside.

The external power supply unit 210 includes a voltage adjusting unit 211 for controlling the voltage of Vcc to be maintained at a voltage of + 5V or -5V, and a voice signal, a first call signal, a recall signal, and a back tone signal in a low impedance power circuit. Impedance control unit for preventing the decrease of the power supply and a DC power control unit 213 for controlling to supply a stabilized DC power.

The outer caller 220 is configured to transmit a call signal input from the outside by the user to the call detector 330.

The outer caller 220 may restart by the operation of the call switch 221, the first call signal unit 222 that generates the first call signal, and the call switch 221 after the first call signal is generated. Recall unit 223 for generating a call signal.

The outer voice hybrid unit 230 is configured to provide a voice input signal input through the microphone and a voice output signal provided from the inside to the user through the speaker.

The outer signal mixer 240 mixes a voice signal input to the outer voice hybrid unit 230 through a microphone, a first call signal provided from the outer call unit 220, and a recall signal and transmits the same to the inside. And a back tone signal, Vcc, provided from the inside.

When the LED control unit 250 is called when the brightness is about 7Lux or less or at night, when the Vcc is applied to the outside and the image signal captured by the camera module is transferred to the inside, the user's face is output to the LCD module. It is configured to control the LED to identify the face of the.

The image input unit 260 is configured to separate the image signal input from the outside into (+) and (-) image signals having a phase difference of 180 degrees, respectively, and provide the same.

The image input unit 260 divides the image signal photographed by the camera module 261 and the camera module 261 into (+) and (-) image signals having a phase difference of 180 degrees to respectively capture an image from the outside. And a video signal transmitter 262 which separates and transmits the level down to 0.5Vpp.

The operation description according to the configuration of FIG. 2 is as follows.

When the Vcc voltage in the form of DC power is provided to the outside through the first connection line from the inside, the Vcc voltage is provided to the outer power supply unit 210 through the outer signal mixing unit 240.

The Vcc voltage applied to the DC power control unit 213 is output from the voltage adjusting unit 211 to + 5V and -5V through the impedance matching unit 212, and the second connection line is in a ground state.

When the user approaches the camera on the outer side and presses the call switch 221, the + 5V voltage is reduced to + 3V when waiting on the first connection line, and the first call is made by the inner first call detection unit 331 according to the voltage change. The signal is recognized as a signal and transferred to the microcomputer 340.

Thereafter, the microcomputer 340 transmits a signal to the inner power supply unit 310 to control Vcc (about + 13V) to be supplied to the first connection line.

In the external power supply unit 210, the DC power control unit 213 operates to output voltages of + 5V and -5V from the voltage adjusting unit 211, and accordingly, the image input unit 260 operates to capture a user captured by the camera module 261. Is input to the video signal transmitter 262.

At this time, the input image signal is divided into (+) and (-) signals having a phase difference of 180 degrees, and is transmitted inside through the third connection line and the fourth connection line, and the image of the user photographed from the outside is output to the LCD module.

Meanwhile, when the user outside presses the call switch 221 again, a frequency of about 32 KHz is generated in the recall unit 223 and transmitted to the inside through the outer signal mixing unit 240 and the first connection line.

When the inner recall detection unit 332 detects the recall signal transmitted from the outside and provides it to the microcomputer unit, and the user of the inner side presses the call switch, the connection between the inner side and the outer side is performed and the voice call state is performed.

At this time, when the user inputs a voice signal through the microphone, the voice signal is transmitted inward through the external signal mixer 240 through the external voice hybrid 230.

Meanwhile, when the door opening / closing signal output unit 380 transmits the door opening / closing signal to the outside through the third connection line, the door opening / closing signal transmitted from the outer door opening / closing unit 270 is detected to drive the outer door opening / closing signal. .

3 is a view showing the inner structure of the video phone according to the present invention.

As shown, the inner portion 300 is the inner power supply unit 310, the inner signal mixing unit 320, the call detection unit 330, the microcomputer unit 340, the ring tone output unit 350, the back tone amplifier 360, An audio output unit 370, a door open / close signal output unit 380, and an image output unit 390 are included.

The inner power supply unit 310 is configured to supply power for driving, the power supply unit 313 that generates power, the DC power supply to control the power supplied when the voltage output from the power supply unit 313 to the outside operating The controller 312 and an impedance matching unit for preventing the voice signal, the first call signal, the recall signal, and the back tone signal from being reduced in the low impedance power circuit.

The inner signal mixer 320 provides the call signal transmitted from the outside to the call detector 330 and the back tone signal provided from the back tone amplifier 360, the inner voice signal provided from the voice output unit 370, and the inner power supply unit. And mixes the Vcc voltage provided at 310 to the outside.

The call detection unit 330 is configured to detect a call signal transmitted from the outside, which is generated according to the operation of the first call detection unit 331 for detecting the first call signal and the call switch 221 after the first call signal generation. And a recall detector 332 for detecting the recall signal.

The microcomputer 340 is configured to control the ring tone output unit 350 to generate a ring tone provided to the inner speaker according to the detection signal output from the call detector 330.

The ring tone output unit 350 is configured to generate a ring tone through the control of the microcomputer 340 and to output a ring tone through the inner speaker, which is connected to the inner speaker according to the ring tone detection signal from the outside of the microcomputer 340. The call sound generating unit 351 for generating the call sound is output, and the call sound amplification unit 352 for amplifying the call sound output from the call sound generator 351 and outputs to the inner speaker.

The back tone amplification unit 360 is configured to amplify the back tone signal according to the ring tone generation of the ring tone output unit 350 and transmit it to the outside.

The voice output unit 370 is configured to output the voice signal transmitted from the outside to the inner speaker and transmit the voice signal input through the inner microphone to the outside.

The voice output unit 370 includes an inner voice hybrid unit 371 for mutually processing a voice signal transmitted from the outside and a voice signal input from the inside, and a voice signal input from the voice signal input from the inside microphone and the inside microphone. By comparing the levels, a high voice signal is passed and amplified, and a low level voice signal is blocked, and the amplified voice signal output from the voice switching amplifier 372 and the voice switching amplifier 372 is output to the internal speaker. A voice amplifier 373 is included.

The door open / close signal output unit 380 is configured to provide an open / close signal to the outside so as to open and close the outer door.

The image output unit 390 is configured to receive an image signal provided separately from the outside and provide the image signal to the inner LCD module. The image output unit 390 receives an image (+) and an image (-) signal provided separately from the outside to receive the image signal. And a video signal receiver 391 and a video signal output from the video signal receiver 391, which block the audio-induced signal and pass only the video signal having a 180 degree phase difference to combine into a single video signal. LCD module 392 is included.

The operation description according to the configuration of FIG. 3 is as follows.

In the standby state, the power supply unit 313 of the inner power supply unit 310 provides + 5V through the first connection line on the inner side, and when the first call signal is detected by the microcomputer unit 340 from the outside, The DC power supply control unit 312 transmits a power control signal to provide Vcc to the outside and Vcc to the inside.

On the other hand, when the first call signal is detected by the first call detection unit 331 through the first connection line from the outside, the detection signal of the first call signal is provided to the micom unit 340.

In addition, when the recall signal is detected by the recall detector 332 through the first connection line, the detection signal of the recall signal is also provided to the microcomputer 340.

The microcomputer 340 controls the back tone signal to be transmitted to the outside after passing through the inner signal mixer 320 through the back tone amplifier 360 according to the detection signal, and outputs the output signal to the call tone output unit 350. to provide.

When the output signal from the micom unit 340 is provided to the ring tone generator 351 of the ring tone output unit 350, a ring tone signal for providing to the inner speaker is generated.

The ring tone signal provided by the ring tone generator 351 is output to the inner speaker via the ring tone amplifier 352 and is provided to the user.

The voice signal provided from the outside passes through the inner signal mixer 320 and is input to the inner voice hybrid unit 371 of the voice output unit 370.

The input outside voice signal passes through the inside voice hybrid part 371 and the voice switching amplifier 372 and is finally amplified by the voice amplifier 373.

The amplified voice signal is output to the user through the inner speaker.

Meanwhile, the voice signal of the user input through the inner microphone is processed through the voice switching amplifier 372 and the inner voice hybrid unit 371, and then output through the outer speaker through the inner signal mixer 320.

The door open / close signal output unit 380 provides the door open / close signal to the outside through the third connection line.

The image (+) and image (-) signals, which are separated from the outside and input through the third connection line and the fourth connection line, are integrated into one image signal through the image signal receiver 391 of the image output unit 390. The integrated video signal is provided to the inner user through the LCD module 392.

As described above, the 4-wire video phone according to the present invention has a phase difference of 180 degrees and a video signal level of 0.5 Vpp, compared to a conventional door phone in which noise is generated by inducing a video signal to an audio signal when transmitting a video signal. Since the video signal and the audio signal do not interfere with each other, the noise is not generated and the video signal is transmitted up to 300m long to transmit the video signal. to provide.

In addition, it provides an effect of transmitting a variety of signals, such as a first call signal, a recall signal, and a voice signal through the first and second connection lines of the inner and outer.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalent claims.

Claims (9)

An external power supply unit for maintaining a constant voltage Vcc provided from the inside, An outer calling unit for providing a calling signal input from the outside to the inside, An outer voice hybrid unit for mutually processing a voice signal input from the outside and a voice signal transmitted from the inside; An outer signal mixing unit for mixing the voice signal transmitted from the outer voice hybrid unit and the call signal transmitted from the outer calling unit and transmitting the inner signal; LED control unit for controlling the LED on the outside, An image input unit for separating and transmitting an image signal photographed from the outside to the inside, An outer portion including a door opening and closing portion for performing a door opening and closing signal transmitted from the inside; Internal power supply for providing Vcc, A call detector for detecting a call signal provided from the outside; A microcomputer unit for controlling a call sound to be generated through the call signal detected by the call detection unit; An inner signal mixer for mixing the inner voice signal, the back tone signal, and the Vcc to the outside, A ring tone output unit for generating a ring tone under the control of the microcomputer unit and outputting the ring tone to an inner speaker; A backtone amplifier for amplifying a ring tone output signal provided from the ring tone output unit, A voice output unit for outputting a voice signal provided from the outside to the speaker and transmitting the voice signal input from the inside to the outside; A door open / close signal output unit for transmitting a door open / close signal, A 4-wire video phone comprising an inner part including an image output unit for receiving an input video signal separated from the inner side and providing the same to an LCD module. The method of claim 1, wherein the outer power supply unit DC power control unit for controlling a stabilized DC power supply, Impedance matching unit for preventing the voice signal, the first call signal, the recall signal and the back tone signal from being reduced in the low impedance power supply circuit, and A 4-wire video phone comprising a voltage adjusting unit for adjusting the Vcc voltage to maintain a constant standby voltage. The method of claim 1, wherein the outer call unit Call switch, A first caller for generating a first call signal, and And a recall unit for generating a recall signal by the operation of the call switch after the first call signal is generated. The method of claim 1, wherein the image input unit A camera module for photographing the outside image, and The video signal captured by the camera module is divided into a video (+) and a video (-) signal having a phase difference of 180 degrees and a video signal level of 0.5 Vpp, and divided into a third connection line and a fourth connection line and transmitted to the inside. 4-wire video phone including a video signal transmitter. According to claim 1, wherein the inner power supply unit Power supply unit for supplying power to drive the video phone, A DC power control unit controlling the output voltage of the power supply unit to be supplied to a stabilized DC power source, and A four-wire video phone including an impedance matching unit for preventing a decrease in a voice signal, a first call signal, a recall signal, and a back tone signal in a low impedance power circuit. The call detection unit of claim 1, wherein the call detection unit A first call detection section for detecting a first call signal transmitted from the inside, and A four-wire videophone including a recall detector for detecting a recall signal generated according to the operation of the call switch after the first call signal is generated. According to claim 1, wherein the ring tone output unit A ring tone generator for generating a ring tone through the control of the microcomputer unit, and And a call sound amplifier for amplifying the call sound output from the call sound generator and providing the call sound to an inner speaker. According to claim 1, wherein the audio output unit An inner voice hybrid unit for processing the voice signal transmitted from the outside and the voice signal input from the inside; A voice switching amplifier which compares the level of the voice signal transmitted from the outside to the level of the voice signal input from the inner microphone and passes and amplifies the high voice signal and blocks the low level voice signal; And a voice amplifier for amplifying and outputting the voice signal output from the voice switching amplifier to an inner speaker. The display apparatus of claim 1, wherein the image output unit It is divided into video signal of phase difference of 180 degrees from the outside and received as video (+) and image (-) signal to block external and audio-induced signals that are the same phase difference, and passes only the image signal of 180 degree phase difference. Image signal receiver for combining the signal and  And a LCD module for providing a video signal output from the video signal receiver to an inner user.

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