KR101693703B1 - Bi-directional communication video phone for transmitting high-definitiom data - Google Patents

Abstract

The present invention relates to a video phone and a video phone driving method, and more particularly, to a video phone and a video phone driving method in which high-definition digital data is bidirectionally transmitted between a front door camera unit and a monitor unit using only four wire lines composed of two power supply lines and two data lines And a method of driving the video phone.

Description

[0001] The present invention relates to a video phone and a video phone capable of bidirectional transmission of high-quality digital data,

The present invention relates to a video phone and a video phone driving method, and more particularly, to a video phone and a video phone driving method in which high-definition digital data is bidirectionally transmitted between a front door camera unit and a monitor unit using only four wire lines composed of two power supply lines and two data lines And a method of driving the video phone.

A video phone is a communication system in which a video signal and a voice signal are transmitted bidirectionally, collectively referred to as a telephone capable of talking while viewing the face of the other party.

With the recent development of high-resolution image sensors and high-quality displays, video phones capable of transmitting high-definition (HD) video and audio are actively developed.

Meanwhile, a video phone is also applied to a communication system in which a call can be made between a visitor and an occupant in the house. Conventionally, in the case of a home video phone, a video signal obtained from a camera installed in a door is transmitted as an analog video signal of NTSC / PAL And the indoor display is driven by a method of converting analog signals into digital signals and outputting them.

In this case, image quality deterioration occurs in the process of converting an analog video signal into a digital video signal, and a high-resolution image can not be output.

In addition, there is a technology for transmitting HD-level video using a coaxial cable or UTP (unshielded twisted pair cable) in a system such as CCTV, but it is not applicable to a home video phone that does not use a coaxial cable.

In addition, in the case of UTP, there are problems in that the number of wiring is increased by eight wiring lines, so that the connection and communication method are complicated and the installation cost is also increased.

[Prior Art Literature]

[Patent Literature]

1. Korean Patent No. 10-0759880, a method of making a call connection between a door phone of a video phone and an external telephone

2. Korean Patent Registration No. 10-1229370, video data reception and transmission system of video phone, and video data processing method thereof

3. Korean Patent No. 10-0236831, a video phone service device using low rate data and control method thereof

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a digital camera capable of bidirectionally transmitting high-quality digital data between a porch camera unit provided in an outdoor- And a method of driving the video phone and the video phone.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a portable terminal including a door camera unit for acquiring a video and audio of a visitor and transmitting the video and audio to a monitor unit or outputting a voice received from a monitor unit; And a monitor unit connected to the front door camera unit through a communication line, for receiving and outputting video and audio from the front door camera unit, or acquiring a voice of the occupant and transmitting the voice to the door camera unit, The front door camera unit and the monitor unit respectively receive the data transmitted through the data line through the data line and the received data is transmitted through the data line, And when the data is different from the transmitted data, it determines that the data is transmitted by the other party, performs reception processing, and outputs the video or audio.

In a preferred embodiment, the door camera unit comprises: a camera unit image sensor that captures an image of a visitor; A microphone for acquiring a voice of a visitor; A camera unit image and sound conversion module for coding and outputting information obtained from the camera unit image sensor and the camera unit microphone or for decoding and outputting information received from the monitor unit; A camera unit speaker for outputting a voice decoded by the camera unit video and audio conversion module; A camera module communication module for transmitting data coded by the camera module video and audio conversion module to the monitor module via the communication line or receiving data from the monitor module and transmitting the data to the camera module and the voice conversion module; A camera sub-processor for controlling operations of the camera sub-image sensor, the camera sub-microphone, the camera sub-image and voice conversion module, the camera sub-speaker, and the camera sub-module; And a camera unit memory for storing a camera unit driving program for driving the camera unit processor.

In a preferred embodiment, the door camera unit further includes a call button that a visitor can press, and the camera sub-processor is operable in an operation mode (sleep mode) in a sleep mode for power saving when the call button is input, ). ≪ / RTI >

According to an embodiment of the present invention, the camera module and the voice conversion module compress the image obtained by the camera module image sensor into the H.264 format, and adaptive differential pulse code modulation (ADPCM) And compressed into a format.

In a preferred embodiment, the camera module communicates data encoded in the camera module and voice conversion module with Manchester coding schemes of a baseband scheme.

In a preferred embodiment, the camera module communication module receives the data transmitted from the camera module again from the monitor, compares the received data with the transmitted data, and determines that the data is transmitted from the monitor So that the received data is decoded through the camera unit video and audio conversion module, and then output through the camera unit speaker.

In a preferred embodiment, the monitor unit includes: a monitor module communication module that receives data from the camera module or transmits data output from the monitor module video and audio conversion module to the camera module; A monitor unit communication module for decoding the data received from the monitor unit communication module and outputting the decoded data to the monitor unit speaker and the monitor unit display, module; A monitor unit speaker for outputting a sound decoded by the monitor unit video and audio conversion module; A monitor sub-display for outputting an image decoded by the monitor sub-image and sound converting module; A monitoring unit microphone for acquiring a voice of the occupant and transmitting the voice to the monitor unit video and audio conversion module; A monitor unit processor for controlling operations of the monitor unit communication module, the monitor unit video and audio conversion module, the monitor unit speaker, the monitor unit display, and the monitor unit microphone; And a monitor unit memory for storing a monitor unit driving program for driving the monitor unit processor.

In a preferred embodiment, the monitor communication module receives the data transmitted from the camera unit again from the camera unit, compares the received data with the transmitted data, and determines that the data transmitted from the camera unit And the received data is decoded through the monitor unit video and audio conversion module, and then output through the monitor unit speaker and the monitor unit display.

According to another aspect of the present invention, there is provided a method of operating a video phone for exchanging video and audio between a visitor and an occupant using the video phone. When the call button of the door camera is pressed, the camera unit processor is activated in the sleep mode step; The camera image sensor and the camera unit microphone acquire a video and voice of a visitor and transmit the acquired image and voice to the camera unit video and audio conversion module; Wherein the camera unit video and audio conversion module codes the video and audio of the visitor in a predetermined format and transmits the encoded video and audio to the camera unit communication module; Transmitting the video and audio data coded by the camera module communication module to the monitor module communication module; Receiving the data from the camera unit communication module and transmitting the data to the monitor unit video and audio conversion module; Transmitting the video to the monitor sub-display and the audio to the monitor sub-speaker by decoding the received data in the monitor sub-video and audio converting module; And outputting an image of a visitor of the monitor unit display, and outputting a visitor's voice from the monitor unit speaker.

In a preferred embodiment of the present invention, after transmitting the coded video and audio data to the monitor communication module, the camera communication module receives the data transmitted from the camera communication module again, Comparing the data with each other and determining that the monitor communication module has transmitted the data and transmitting the received data to the camera module and the voice conversion module; Decoding the received data by the camera unit video and audio conversion module and transmitting the decoded data to the camera unit speaker; And outputting audio by the camera sub-speaker.

In a preferred embodiment of the present invention, the step of transmitting the video and audio data coded by the camera module communication module to the monitor module communication module may include transmitting the audio data of the audience module decoded by the monitor module communication module to the monitor module communication module Transmitting; And a monitoring unit communication module for receiving the data transmitted from the monitor communication module again, comparing the received data with the transmitted data, determining that the monitor communication module has transmitted data, To the voice conversion module.

The present invention has the following excellent effects.

According to the video phone and the method for driving a video phone of the present invention, it is possible to provide a high quality image between the front door camera unit and the monitor unit with only two data lines for data transmission and reception and two power supply lines for power supply, It is advantageous to transmit the digital data of both directions in two directions.

According to the video phone and the video phone driving method of the present invention, since the coded digital data is transmitted and received, there is an advantage of solving the problem of deterioration of image quality occurring when analog data is decoded into digital data.

1 is a view for explaining an installation environment of a video phone according to an embodiment of the present invention;
2 is a block diagram of a video phone according to an embodiment of the present invention.
3 is a flowchart of a method of driving a videophone according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

1 and 2, a video phone 100 according to an embodiment of the present invention is attached at a predetermined position around a front door 11, receives a video or voice of a visitor, A monitor unit 120 provided in the living room 10 and connected to the door camera unit 110 for receiving a video or voice of the occupant and transmitting the received video or voice to the door camera unit 110; ).

That is, the video phone 100 is a communication device that allows the front-door camera unit 110 and the monitor unit 120 to transmit and receive video and audio to each other, and to allow video and audio communication between a visitor and an occupant.

The front door camera unit 110 acquires the video and audio of the visitor and transmits the video and audio to the monitor unit 120 or the audio received from the monitor unit 120.

However, the front door camera unit 110 can further output images according to the specifications.

1, the front door camera unit 110 is installed around the front door 11. However, if the door camera unit 110 can be accessed by a visitor, the installation position is not particularly limited.

The front door camera unit 110 includes a camera unit image sensor 111, a camera unit microphone 112, a camera unit video and audio conversion module 113, a camera unit speaker 114, a camera unit communication module 115, A camera sub-processor 116, and a camera sub-memory 117, as shown in Fig.

In addition, the camera image sensor 111 is a sensor for capturing an image of a visitor. In the present invention, the image sensor is composed of a CMOS image sensor of a complementary metal-oxide semiconductor (CMOS) type.

However, there is no limit to the specification of the sensor, and a sensor capable of acquiring an HD-level image is sufficient.

In addition, the camera unit microphone 112 acquires a voice of a visitor.

The camera section video and audio conversion module 113 may code and output the video obtained from the camera section image sensor 111 and the audio obtained from the camera section microphone 112 in a predetermined format, And decodes the coded data received from the decoding unit 120 and outputs the coded data.

That is, the camera unit video and audio conversion module 113 is a codec device capable of encoding and decoding data.

For example, the camera-side video and audio conversion module 113 compresses an input video in the H.264 (MPEG4 Part 10 / AVC) format and compresses the input audio in an ADPCM (Adaptive Differential Pulse Code Modulation) format Can be output.

The compression formats described above can be replaced with other compression formats capable of compressing HD-level video and audio, as an example of a compression format capable of compressing a current high-definition image or sound.

In addition, the camera sub-speaker 114 outputs a voice signal decoded by the camera sub-image and voice conversion module 113 as a sound.

The camera module communication module 115 transmits the coded data from the camera module and the voice conversion module 113 to the monitor module 120 or transmits the data received from the monitor module 120 to the camera module 120. [ And transmits it to the sub-picture and voice conversion module 113.

In addition, the camera module communication module 115 codes the data coded by the camera module and the voice conversion module 113 into Manchester coding schemes of a baseband scheme and transmits the Manchester coding schemes.

That is, since the front-door camera unit 110 transmits the video and audio signals as digital signals, when the monitor unit 120 outputs an image, it can prevent deterioration in image quality caused by converting an analog signal into a digital signal It is.

Also, since the baseband method transmits a digital signal without modulating the original signal into another frequency band, the data transmission is advantageous. In the Manchester coding technique, It is a line coding method that makes polarity change.

The camera sub-processor 116 may include a camera sub-image sensor 111, a camera sub-microphone 112, a camera sub-image and sound modulating module 113, a camera sub-speaker 114, And a central control processor for controlling the operation of the communication module 115.

In addition, the camera sub-processor 116 may be a chip integrated in a SOC (System on Chip) form.

In addition, the camera sub-memory 117 stores a camera sub-program and an operating system for operating the camera sub-processor 116.

In the present invention, the operating system is provided as a Linux OS.

In addition, the entrance camera unit 110 of the present invention further includes a call button 118 that a visitor can press by hand.

In addition, the call button 118 may be implemented by a variety of switch methods that can be pressed by hand, such as a push switch method or a touch method.

Also, when the call button 118 is pressed, the camera sub-processor 116 is woken up in an operation mode in a sleep mode for power saving. That is, power consumption can be minimized.

In addition, although not shown, the front door camera unit 110 may further include a display capable of receiving and displaying an image of a room occupant from the monitor unit 120.

The monitor unit 120 is attached to a wall surface of a living room 10 and is connected to the door camera unit 110 through a communication line 130.

However, the mounting position of the monitor unit 120 is not particularly limited, and may be a portable device detachable from the wall of the room.

The communication line 130 is composed of a total of four wiring lines including two power lines 12V and GND and two data lines DATA + and DATA-.

In addition, since the camera unit 110 and the monitor unit 120 communicate asynchronously through the Manchester coding technique, communication is possible using only two data lines without wiring for transmission of a synchronous clock signal.

In addition, the front door camera 110 and the monitor unit 120 immediately receive the transmitted data immediately, and when the transmitted data and the received data differ from each other, the front-door camera 110 and the monitor unit 120 determine that the received data is data transmitted by the other party, It outputs video or audio.

The data checking process may be performed by the camera module communication module 115 of the door camera 110 and the monitor module communication module 121 of the monitor module 120.

That is, according to the video phone 100 of the present invention, it is possible to check whether data is transmitted using only two data lines and to output data transmitted by the other party.

The monitor unit 120 includes a monitor communication module 121, a monitor unit video and audio conversion module 122, a monitor unit speaker 123, a monitor unit display 124, a monitor unit microphone 125, A secondary processor 126, and a monitor unit memory 127.

The monitor module communication module 121 is connected to the camera module communication module 115 through the data line and receives data from the camera module communication module 115 or receives data from the monitor module video and audio conversion module 122 to the camera module communication module 115.

In addition, the monitor communication module 121 can code and transmit data using the Manchester coding scheme of the baseband method.

The monitor unit video and audio conversion module 122 receives and decodes the data received by the monitor unit communication module 121 and transmits the video information to the monitor unit display 124, And transmits it to the sub speaker 123.

Also, the monitor unit video and audio conversion module 122 may code the voice of the occupant input to the monitor unit microphone 125 and transmit the voice to the monitor unit communication module 121.

In addition, the monitor unit video and audio conversion module 122 may compress the audio information of the occupant in an Adaptive Differential Pulse Code Modulation (ADPCM) format for transmission.

In addition, although not shown, the monitor unit 120 may further include an image sensor for acquiring an image of the occupant. In this case, the monitor unit video and voice conversion module 122 codes the voice of the occupant Can be transmitted to the monitor section communication module 121.

In addition, the monitor unit video and audio conversion module 122 may encode an occupant's image into H.264 (MPEG4 Part 10 / AVC) format and code.

In addition, the monitor unit speaker 123 outputs a sound of a visitor decoded by the monitor unit image and sound conversion module 122.

In addition, the monitor sub-display 124 displays an image of a visitor decoded by the monitor sub-image and voice conversion module 122.

In the present invention, the monitor unit display 124 is configured as an LCD panel of 1280 x 720 resolution. However, if it is possible to output HD-quality video, it can be replaced with a display of various specifications.

In addition, the monitor microphone 125 acquires the voice of the occupant and transmits the voice to the monitor unit video and voice conversion module 121.

The monitor processor 126 is connected to the monitor unit communication module 121, the monitor unit video and audio conversion module 122, the monitor unit speaker 123, the monitor unit display 124, And controls the operation of the microphone 125.

Also, the monitor processor 126 may be a chip integrated in the SOC form.

The monitor unit memory 127 may store a monitor program and an operating system for driving the monitor unit processor 126.

FIG. 3 is a flowchart of a video phone driving method for transmitting and receiving video and audio between a visitor and an occupant using a video phone 100 according to an embodiment of the present invention. Referring to FIG. 3, First, the call button of the door camera 110 is pressed (S1000), and the camera sub-processor is activated in an operation mode in a sleep mode (S1100).

Next, the camera image sensor 111 and the camera module microphone 112 acquire the image and sound of the visitor (S2000) and transmit the acquired image and sound to the camera module and the sound conversion module 113.

Next, the camera subsection image and voice conversion module 113 codes the inputted image and voice and outputs it as image data and voice data (S3000).

Next, the camera module communication module 115 transmits the data output from the camera module video and voice conversion module 113 to the monitor module 120 (S4000).

Next, the camera module communication module 115 receives the transmitted data directly from the monitor unit 120 (S4100), and when the transmitted data and the received data differ from each other, It is determined that the data is to be transmitted (S5000), the data is received (S5100), and the received data is transmitted to the camera sub-image and voice conversion module 113. [

In addition, the camera module communication module 115 continuously transmits the data output from the camera module and the voice conversion module 113 to the monitor module 120 (S4200).

Next, the camera module video and audio conversion module 113 decodes the received data (S5200) and transmits the decoded data to the camera module speaker 114, and the camera module speaker 114 outputs the voice of the occupant.

In addition, the monitor module communication module 121 transmits the data to the camera module communication module 115 (S4100), immediately receives the transmitted data, compares the transmitted data and the received data with each other, If it is determined that the transmission data and the reception data are different from each other, it is determined that the front camera unit 110 transmits the data (S6000), the data is received (S6100) And transmits it to the voice conversion module 122.

The data transmitted by the monitor communication module 121 to the door camera unit 110 may be voice data of the occupant and may be any data for confirming whether the door camera unit 110 transmits data. .

Next, the monitor unit video and audio conversion module 122 decodes the input data (S6200), transmits the video information to the monitor unit display 124, and transmits the audio information to the monitor unit speaker 123 do.

Next, the monitor sub-display 124 outputs an image of a visitor, and the monitor sub-speaker 123 outputs a visitor's voice (S6300).

In parallel with the process of outputting the video and audio of the visitor, the monitor microphone 125 acquires the voice of the occupant (S7000). The monitor unit video and audio conversion module 122 codes the received audio information in step S7100 and transmits the encoded audio information to the monitor unit communication module 121. [

Next, the monitor module communication module 121 transmits the inputted voice data to the camera module communication module 115 (S7200).

Next, the front door camera unit 110 and the monitor unit 120 transmit and receive data bidirectionally until the end (S8000).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

100: Video phone 110:
111: camera part image sensor 112: camera part microphone
113: camera unit video and audio conversion module 114: camera unit speaker
115: camera module communication module 116: camera module processor
117: camera sub-memory 118: call button
120: Monitor section 121: Monitor section communication module
122: monitor part video and audio conversion module 123: monitor part speaker
124: Monitor sub display 125: Monitor microphone
126: Monitor part processor 127: Monitor part memory
130: communication line

Claims (11)

A door camera unit for acquiring a video and audio of the visitor and transmitting the video and audio to the monitor unit or outputting the video and audio received from the monitor unit; And
And a monitor unit connected to the front door camera unit through a communication line, for receiving and outputting video and audio from the front door camera unit, or acquiring video and audio of the occupant and transmitting the video and audio to the frontview camera unit,
The communication line is composed of a total of four wiring lines including two power lines and two data lines,
The front door camera unit comprises:
A camera unit image sensor for photographing a video of a visitor;
A microphone for acquiring a voice of a visitor;
A camera unit image and sound conversion module for coding and outputting information obtained from the camera unit image sensor and the camera unit microphone or for decoding and outputting information received from the monitor unit;
A camera unit speaker for outputting a voice decoded by the camera unit video and audio conversion module;
A camera module communication module for transmitting data coded by the camera module video and audio conversion module to the monitor module via the communication line or receiving data from the monitor module and transmitting the data to the camera module and the voice conversion module;
A camera sub-processor for controlling operations of the camera sub-image sensor, the camera sub-microphone, the camera sub-image and voice conversion module, the camera sub-speaker, and the camera sub-module;
A camera module memory for storing a camera module driving program for driving the camera module processor;
A camera sub-display for receiving and outputting images from the monitor unit; And
A call button that a visitor can visit;
The camera unit video and audio conversion module compresses and codes an image obtained from the camera unit image sensor and a voice obtained from the camera unit microphone,
The camera module communicates with a baseband Manchester coding scheme to digitally transmit video and audio data coded by the camera module and voice conversion module, Line, receives data transmitted from the monitor unit again, compares the received data with the transmitted data, and determines that the transmitted data is the data transmitted from the monitor unit, Data is decoded through the camera unit video and audio conversion module, and is output as video and audio through the camera sub-display and the camera sub-speaker,
Wherein the camera unit processor is in a sleep mode and is activated in an operation mode when there is an input of the call button, so that the camera unit image sensor, the camera unit microphone, the camera unit video and audio conversion module, Controls the operation of the camera module communication module,
The monitor unit,
A monitor image sensor for acquiring an image of an occupant;
A monitor section microphone for acquiring the voice of the occupant;
A monitor module communication module for receiving data from the camera module or transmitting data output from the monitor module video and voice conversion module to the camera module;
Decodes the data received by the monitor communication module and outputs the decoded data to the monitor speaker and the monitor sub-display, or codes the information obtained from the monitor image sensor and the monitor microphone to transmit the decoded data to the monitor communication module Monitor part video and audio conversion module;
A monitor unit speaker for outputting a sound decoded by the monitor unit video and audio conversion module;
A monitor sub-display for outputting an image decoded by the monitor sub-image and sound converting module;
A monitor unit processor for controlling operations of the monitor unit communication module, the monitor unit video and audio conversion module, the monitor unit speaker, the monitor unit display, and the monitor unit microphone; And
And a monitor unit memory for storing a monitor unit driving program for driving the monitor unit processor,
The monitor unit video and audio conversion module compresses and codes an image obtained from the monitor unit image sensor and a voice obtained from the camera unit microphone,
The monitor unit communication module codes and transmits the coded data by the baseband-type Manchester coding scheme to digitally transmit the coded data from the monitor unit video and audio conversion module, receives the transmitted data from the camera unit again , And when the received data and the transmitted data are compared with each other and the received data and the transmitted data are different from each other, the received video and audio data are decoded through the monitor unit video and audio conversion module, Speaker and the monitor sub-display,
Wherein the front-door camera unit and the monitor unit transmit and receive high-quality video and audio data without deterioration of image quality in two directions using two data lines to support video and audio call between the visitor and the occupant.
delete delete The method according to claim 1,
The camera image and sound conversion module compresses the image obtained from the camera image sensor into the H.264 format and compresses the voice obtained from the camera module microphone into an Adaptive Differential Pulse Code Modulation (ADPCM) Lt; / RTI >




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