KR100529241B1 - Video call service method using a digital set-top box - Google Patents

Abstract

The present invention uses a digital set-top box that enables a video call between the sender and the receiver through a sub-screen of a television, and records and transmits the caller's video call message when the receiver is absent. The present invention relates to a video call service method, wherein when a video call service is selected from a category on the initial screen of a television connected to a sender's digital set-top box, and a receiver to be called is designated, the caller's digital set-top box operates the designated receiver information. Transmitting to the service providing device through the device; A second step of the service providing apparatus transmitting a video call reception signal to a digital set-top box of a corresponding receiver based on the receiver information; A third step of making a video call with the receiver by making a call connection to a sub-screen of a television connected to the sender's digital set-top box when the receiver has approved the video call; A fourth step of, if the receiver is absent, recording a predetermined video message according to the caller's selection of whether to record the video message, and transmitting the recorded video message to the service providing apparatus through the system operating apparatus and storing it; And a fifth process in which the service providing apparatus transmits the predetermined video message to the receiver's digital set-top box through the system operating apparatus, even though the existing telephone network is used, the maximum down 25 Mbps and the bidirectional simultaneous 12 Mbps. By using VDSL transmission method using digital set-top box and system operating system, it is possible to make high-definition video call in real time without any problem to use general telephone and simultaneously make video call through multiple PIP windows. When the user is outside, the user can view the image message recorded in the absence by using the homepage of the service providing apparatus anytime and anywhere.

Description

Video call service method using a digital set-top box}

The present invention relates to a video call service method using a digital set-top box, and more particularly, not only a video call with a counterpart via a PIP of a television connected to the digital set-top box, but also a recording and transmission of a video message and a video message thereof. The present invention relates to a video call service method using a digital set-top box to enable the storage of data.

Currently, when a visitor comes from a home or an office, a video phone is used to identify the visitor. However, since such a video phone has only a function of delivering voice information and image information of the visitor, the visitor information in the absence is unknown.

In addition, there is a video communication system using a computer, which stores image information and audio information as a digital signal, converts it into an analog signal, and transmits it to a receiving device at a remote location, and transmits a digital signal containing image information or audio information from a remote location. It refers to a method in which a plurality of speakers at a remote place communicate with each other by looking at each other based on the information which is received as an analog signal and converted into digital information and finally output to a video device and an audio device.

In general, to conduct a video conference or video call, a microphone, which is a device for inputting voice information of a speaker, a speaker, which is a device for outputting voice information transmitted from the other party, a camera, a device, which is a device for inputting video information of the speaker, and the other party A monitor, which is an apparatus for outputting image information transmitted from the apparatus, a transmission line (e.g. telephone line) for transmitting the audio information and image information, and a modulation / demodulation device (e.g. modem) for modifying / demodulating the audio information and image information. And various controllers for controlling the process.

However, such a videoconferencing system requires that both the sender and the receiver are ready for communication. That is, both the sender and receiver video communication systems must be in an on-line state. If either one is not online, there is a problem that video communication cannot be performed.

The present invention has been proposed to solve the above-described problems, and an object thereof is to provide a video call service method using a digital set-top box that enables video call between a sender and a receiver through a sub-screen of a television.

Another object of the present invention is to provide a video call service method using a digital set-top box that allows the receiver to check later by recording and transmitting a caller's video call message when the receiver is absent.

In order to achieve the above object, a video call service method using a digital set-top box according to a preferred embodiment of the present invention is provided with a service content selected by a user using a telephone line of a VDSL and displayed on a television in real time. A digital set-top box connected to a voice / video input source of a user and wirelessly receiving a voice signal from a remote controller having a microphone; A system operating device installed at a predetermined unit of area and relaying service contents required by the digital set-top box in real time by two-way data communication with an arbitrary digital set-top box; And a service providing apparatus for providing corresponding service contents to a corresponding system operating apparatus in real time according to a service content request from the system operating apparatus input through the Internet.

If the video call service is selected from the category on the initial screen of the television connected to the caller's digital set-top box, and the recipient to be called is designated, the caller's digital set-top box transmits the designated receiver information through the system operating device. A first process of transmitting to a; A second step of the service providing apparatus transmitting a video call reception signal to a digital set-top box of a corresponding receiver based on the receiver information; A third step of making a video call with the receiver by making a call connection to a sub-screen of a television connected to the sender's digital set-top box when the receiver has approved the video call; A fourth step of, if the receiver is absent, recording a predetermined video message according to the caller's selection of whether to record the video message, and transmitting the recorded video message to the service providing apparatus through the system operating apparatus and storing it; And a fifth process of the service providing apparatus transmitting the predetermined image message to the digital set-top box of the corresponding receiver through the system operating apparatus.

In a video call service method using a digital set-top box according to another embodiment of the present invention, a service content selected by a user is provided using a telephone line of a VDSL and displayed on a television in real time, and connected to a plurality of audio / video input sources. A digital set-top box of a user wirelessly receiving a voice signal from a remote controller having a microphone; A system operating device installed at a predetermined unit of area and relaying service contents required by the digital set-top box in real time by two-way data communication with an arbitrary digital set-top box; And a service providing apparatus for providing corresponding service contents to a corresponding system operating apparatus in real time according to a service content request from the system operating apparatus input through the Internet.

When the receiver receives a connection with the digital set-top box of the receiver receiving the video call reception signal from the service providing apparatus, the call is connected to the sub-screen of the television connected to the digital set-top box of the receiver to connect with the caller. A first step of making a video call; A second process of receiving and recording / saving a caller's video message input through the system operating apparatus when the digital set-top box of the receiver receiving the video call reception signal from the service providing apparatus is turned off; ; And as the receiver requests reading after accessing the service providing apparatus through the Internet using a computer outside the home, the service providing apparatus sends a video message of the caller to the corresponding recipient stored in advance. And a third process of transmitting to the computer.

Hereinafter, a video call service method using a digital set-top box according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a configuration diagram of a system to which an embodiment of the present invention is applied and receives service contents selected by a user using a telephone line of a VDSL and displays them on a television in real time, and is connected to a plurality of audio / video input sources and a microphone. Digital set-top box 400 of the user to wirelessly receive a voice signal from the built-in remote controller 500; It is installed by a predetermined regional unit, and is connected to the digital set-top box 400 of the plurality of users in the region through a telephone line of VDSL, and required by the digital set-top box by two-way data communication with any digital set-top box. System operating apparatus 300 for providing a service content in real time; And store and receive various service contents from a content providing device (not shown), and operate the corresponding service contents in real time according to a service content request from the system operating apparatus 300 input through the Internet 200. It is provided with a service providing device 100 to provide to the device (300).

Here, the content providing apparatus is a device managed by a content provider, the service providing apparatus 100 is a device managed by a service provider, and the system operating apparatus 300 is a system operator (that is, a virtual store that is granted goodwill). It can be called an operator).

Although only two of the system operating apparatuses 300 are illustrated in FIG. 1, the system operating apparatuses 300 may be more than one, and one system operating apparatus 300 is capable of two-way communication with about 150 digital set-top boxes 400. Of course, the one system operating device 300 may be bidirectionally communicated with the 150 or more digital set-top boxes 400, as well as can be expanded.

The service providing apparatus 100 includes: a first storage unit for storing contents related to various services; A streaming server for transmitting the service contents stored in the first storage unit to the system operating apparatus 300 through the Internet, and inputting the input service contents to the first storage unit; A storage area network (SAN) switching unit installed between the first storage unit and the streaming server to switch service content movement between the first storage unit and the streaming server; A web / database server for delivering various service contents provided from the content providing apparatus (not shown) to the streaming server through the Internet; Additional information of service contents stored in the first storage unit (for example, location and serial number of each service content, access information of each service operating device, access information of a content providing device, billing information, and operation of other service providing devices) A second storage unit for storing information necessary for the storage; And a Manager PC that searches, inserts, deletes, updates, and reconstructs additional information stored in the second storage unit through the DML command in the web / database server.

The service providing apparatus 100 and the content providing apparatus (not shown) are interconnected by the Internet connected to the web / database server, and the service providing apparatus 100 and the system are connected through the Internet 200 connected to the streaming server. The operating device 300 is interconnected.

In addition, the first storage means a large capacity, which can be expanded as needed, and is used in the same manner as using one storage space with the help of the sand switching unit. That is, the first storage unit is physically independent of a plurality, but is logically a storage space.

The service providing apparatus 100 receives a movie or value-added data from a content providing apparatus (not shown) and stores it in the first storage unit. The stored content is 10 megabytes to several gigabytes. Therefore, in order to solve this, it is necessary to have a switch and a plurality of storage unit.

In addition, the streaming server in the service providing apparatus 100 not only supplies service contents to the system operating apparatuses 300 of several places at the same time by using a method of real time reproducing voice, video, animation, etc. on the Internet, and also announces by region. Provides a variety of information and various information to the system operating device (300).

In addition, the first storage unit of the service providing apparatus 100 may store announcements and various information materials of a corresponding region collected for each region.

On the other hand, the system operating apparatus 300, the storage unit for storing the service content provided from the service providing apparatus 100; A media server connected to the Internet by a cable or an optical cable to receive service contents provided from the service providing apparatus 100, and temporarily store and output the service contents in the storage unit; A multi-point distribution unit for setting and outputting a plurality of transmission paths for service contents output from the media server; And a private branch exchange that transfers the service content from the multipoint distribution unit to the corresponding digital set-top box 400 via a telephone line.

The media server is connected to the streaming server of the service providing apparatus 100 by a cable or an optical cable to receive not only service contents but also regional announcements and various information materials, and the received service contents and regional announcements and various information. Store data in storage.

And, the digital set-top box 400, as shown in Figure 2, from a plurality of audio / video input sources (e.g., television tuner, movie camera, VTR, cable broadcasting, satellite broadcasting, CCD camera, microphone, etc.) A plurality of analog / digital converters (ADCs) for receiving audio / video signals and digitally converting them; The audio / video signal of one channel selected from the audio / video signals of the multiple channels provided from the analog / digital converters is output through the storage signal output port, and the audio / video signals and MPEG of the multiple channels are output. An audio / video switching unit for outputting the decoded audio / video signal through the audio / video signal output port; An MPEG encoder which receives an audio / video signal output through the storage signal output port of the audio / video switching unit and encodes the MPEG signal; A storage unit in the form of a hard disk drive (HDD) in which audio / video signals encoded by the MPEG encoder are stored, and MPEG contents input through a VDSL line or a LAN line are stored; A sub-control unit which stores the output data from the MPEG encoder and the MPEG contents input through the VDSL line or the LAN line to the storage unit, and outputs the data stored in the storage unit; A main control unit for providing a control command for storing and outputting data to the storage unit to the sub control unit, and controlling a corresponding operation based on a remote signal from a remote control unit (not shown) received in the remote control receiving unit; An MPEG decoder which MPEG-decodes the data outputted from the sub-controller and transmits the MPEG-decoded data to the audio / video switching unit; A screen generator for making a video signal of one channel as a main screen and a video signal of other channels among the video signals of a plurality of channels from the audio / video switching unit; The contents of the 24-bit overlay memory (not shown) of RGB 8: 8: 8 are assigned to a specific color key value (ie, the color key value corresponding to the OSD character (or picture) required for the screens to be output). An OSD synthesizer for implementing a graphic OSD suitable for a screen from the screen generator in comparison with the above; A video output section for displaying a video screen from the OSD synthesizing section on a television monitor (not shown); An audio / digital / analog converter for analog converting a voice signal of an active channel to the main screen provided by the audio / video switcher; An audio output unit for outputting audio from the audio digital / analog conversion unit to the outside through a speaker of a television (not shown); RAM which stores codes of operating programs required for the digital set-top box; And a ROM in which all programs related to driving and control of the digital set-top box are stored.

Here, the audio / video switching unit, the sub control unit and the OSD synthesis unit are field programmable gate arrays (FPGAs), which are types of programmable logic chips.

The main control unit and the sub control unit communicate with each other via a local bus. The ROM further stores personal information (eg, name, address, credit card information, ID card information, etc.) of the user using the digital set-top box.

Also, in FIG. 2, the screen generating unit, the OSD synthesizing unit, the image output unit, the audio digital / analog converting unit, and the audio output unit are collectively referred to as a plurality of channels of audio and video output from the audio / video switching unit. It is called audio / video output means outputted according to a user's selection condition under the control of the controller.

The MPEG encoder has a built-in first-in-first-out (FIFO) buffer (not shown), and the secondary controller directly accesses the buffer of the MPEG encoder, and the main controller processes only the control command. The main control unit processes only the control command and the address index for the storage unit, and the sub control unit is in charge of the remaining large burst transmission.

In addition, in FIG. 2, the VDSL line is a telephone line, and a VOD is realized through the VDSL line, and the LAN line is composed of two Internet lines as the Internet line. A network interface card (NIC) is installed between the VDSL line and the two LAN lines and the local bus. The network interface card ensures that the digital set-top box and the network are always connected. The network interface card connected to the two internet lines is provided with a network address translation (NAT) function, which is used as a home gateway device. In other words, if the user is not in a VDSL environment, the user may use a digital set-top box by directly connecting to an Internet line (ie, a LAN line).

Also, the ROM of FIG. 2 includes VOIP software for enabling a digital set-top box to perform a Voice Over Internet Protocol (VOIP) function, and a slick (SLIC-SUBSCRIBER LINE INTERFACE CIRCUITS) on a local bus to perform the VOIP function. One output terminal of is connected, and the other output terminal of the SLIC is connected to the audio / video switching unit.

The SLIC outputs an analog audio signal input as a digital audio signal. The digital audio signal output from the output terminal of the SLIC is input to the audio / video switching unit and also to the main control unit via the local bus.

The main control unit controls the VOIP function based on the VOIP software after storing the VOIP software stored in the ROM when the digital set-top box is powered on. Therefore, the digital set-top box of FIG. 2 also serves as a VOIP phone. That is, the digital set-top box of Figure 2 has a built-in VOIP function for transmitting voice and video using IP.

In FIG. 2, an audio / video signal input from the audio / video input source (ie, a signal input through an analog / digital converter) is composed of an RCA input and a super video (S-video), and the four input sources. Only the audio / video signal of one input source is stored in the storage unit through the MPEG encoder and the sub-controller according to the command of the main controller. Since the four input sources are transmitted to the screen generating unit in real time, they are displayed in a combination of up to three channels while displaying the stored contents.

In addition, the digital set-top box of FIG. 2 can be selected and used in a VDSL telephone environment or a LAN environment capable of high-speed communication of up to 25 megabytes per second and 12 megabits per second in both directions. When a network is selected, a server (not shown) is selected. Through updating the latest content information and necessary data is provided by the user's request. In addition, to facilitate multi-tasking, data input through the network is stored in a hard disk drive (HDD) storage for temporal buffering, and then read from the storage, and the MPEG decoder and audio / video switching unit It is transmitted to the screen generation unit through.

According to the digital set-top box of FIG. 2 configured as described above, various contents can be provided as desired through the VDSL line or the LAN line as well as the normal PVR function, and output is also possible.

And, as shown in Figure 3, the remote control 500, the key input unit 10 for inputting the operation command and the microphone use mode for the digital set-top box 400; A memory 12 for storing standard data for decoding the encoded voice signal and standard data for decoding the operation command signal keyed by the key input unit 10; A microphone 14 for collecting a voice of a user; Voice processing means (40) for signal-processing the voice collected by the microphone (14) and outputting it as a predetermined coded voice signal; When the microphone use mode is set by the key input unit 10, the encoded voice signal from the voice processing means 40 is compared with the standard data previously stored in the memory 12, and then decoded to generate the corresponding infrared signal. A control unit 22 for controlling; An infrared signal generator 24 for generating a predetermined infrared signal under the control of the controller 22; And an infrared transmitter 26 for remotely transmitting the infrared signal output from the infrared signal generator 24 to the digital set-top box 400.

Here, the key input section 10 is provided with a button 10a for turning on / off a voice input through the microphone 14. Of course, the key input unit 10 may include a power button for turning on / off the power of the digital set-top box 30, a volume up / down button for up / down the volume of the output voice of the digital set-top box 400, and a ten key. And special character buttons.

The control unit 22 performs not only the infrared signal generation control in the microphone use mode described above, but also operation control on the digital set-top box 400 which is normally performed.

The voice processing means 40 includes: a sampling unit 16 for cutting out a voice signal waveform of a user collected through the microphone 14 at a predetermined time interval and generating a temporally discontinuous Pulse Amplitude Modulation (PAM) pulse string; A quantization unit 18 for quantizing the amplitude of the PAM pulse signal that is continuously changed with time to produce a digital pulse encoded from the PAM pulse signal output from the sampling unit 16 to discrete values; And an encoding unit 20 which converts the discontinuous PAM pulse string quantized by the quantization unit 18 into a code pulse corresponding to a predetermined numerical value and transmits the coded pulse to the control unit 22.

Here, the sampling unit 16 is composed of a sampling / holding circuit, and the quantization unit 18 is composed of an analog-to-digital conversion circuit.

On the other hand, the microphone 14 is built in the upper front of the remote control 500, the built-in position can be changed as needed. For example, the microphone 14 may be embedded in the lower part of the front surface of the remote controller 500 or in a position opposite to the infrared transmitter 26.

The button 10a of the key input unit 10 is installed below the front surface of the remote controller 500. The position of the button 10a can also be installed on the front upper part of the remote controller 500 as necessary.

Next, a video call service operation using a digital set-top box according to an exemplary embodiment of the present invention will be described with reference to the flowcharts of FIGS. 4 and 5.

First, the video call process at the caller side will be described with reference to the flowchart of FIG.

A caller who wants to make a video call turns on his digital set-top box 400 and selects a video call service from a category on the initial screen of a television (not shown) connected to the digital set-top box 400 (step S10). ).

As the video call service is selected, the digital set-top box 400 displays a screen on which a screen for searching an address book or an ID of a counterpart (recipient) to be connected can be displayed on the monitor of the television.

When the caller operates the remote control 500 to search the address book to designate the other party or input the ID of the other party to connect (step S12), the sender's digital set-top box 400 displays the designated recipient information (that is, who the recipient is. Information indicating whether the information is transmitted) to the service providing apparatus 100 through the system operating apparatus 300 (step S14). Accordingly, the service providing apparatus 100 transmits a video call reception signal to the digital set-top box 400 of the receiver based on the receiver information.

In this way, if there is a video call approval of the receiver, that is, a video call approval signal from the receiver's digital set-top box 400 is transmitted to the service providing apparatus 100, the service providing apparatus 100 transmits the caller. Controls video call between user and receiver. That is, the sub picture PIP of the television connected to the sender's digital set-top box 400 and the sub picture PIP of the television connected to the receiver's digital set-top box 400 are connected to each other by the service providing apparatus 100 ( In step S16), the caller makes a video call with the receiver through the sub picture PIP of the television connected to his digital set-top box 400 (step S18). At this time, the talk content of the caller is collected through the microphone 14 of the remote control 500, the voice processing by the voice processing means 40 and then wirelessly transmitted to the sender's digital set-top box 400, the caller's The digital set-top box 400 sends the caller's voice signal to the service providing apparatus 100 through the system operating apparatus 300, and the service providing apparatus 100 transmits the voice signal to the system operating apparatus 300. It is sent to the digital set-top box 400 of the receiver through the speaker of the television of the receiver.

On the other hand, if the receiver is absent (that is, when the connection approval or connection rejection signal is not input to the service providing apparatus 100), the service providing apparatus 100 is digital through the system operating apparatus 300 of the caller The set top box 400 is notified of the absence of the current recipient (step S20).

Accordingly, the sender's digital set-top box 400 displays a message on the screen of the television to select whether to record the caller's video message (step S22), and reports the message displayed on the screen by the caller to record the video message. If selected ("Yes" in step S24), the caller's digital set-top box 400 records the caller's picture and voice input from an audio / video input source and then sends the recorded video message to the system operating device 300. The data is transmitted to the service providing apparatus 100 and stored (step S26). Here, if the digital set-top box 400 of the receiver is turned off later, the service providing apparatus 100 transmits the video message to the digital set-top box 400 of the receiver through the system operating apparatus 300. .

This time, the video call process at the receiver side will be described with reference to the flowchart of FIG.

When the caller selects a receiver, the designated receiver information is sent to the service providing apparatus 100, and the service providing apparatus 100 images the digital set-top box 400 of the receiver based on the designated receiver information. A call reception signal is sent to notify that a video call has been made (step S30).

Here, when the receiver rejects the connection while the receiver's digital set-top box 400 receives the video call reception signal from the service providing apparatus 100 (step S32), the receiver's digital set-top box ( The connection rejection signal generated at 400 is sent to the service providing apparatus 100 through the system operating apparatus 300, and the service providing apparatus 100 does not perform a video call service.

However, when the receiver receives the connection while the digital set-top box 400 of the receiver receiving the video call reception signal from the service providing apparatus 100 is turned on (step S32), the receiver's digital set-top box ( The connection approval signal generated at 400 is sent to the service providing apparatus 100 through the corresponding system operating apparatus 300, and the service providing apparatus 100 controls the video call between the sender and the receiver. That is, the sub picture PIP of the television connected to the sender's digital set-top box 400 and the sub picture PIP of the television connected to the receiver's digital set-top box 400 are connected to each other by the service providing apparatus 100 ( In step S38), the receiver makes a video call with the caller through the sub-picture (PIP) of the television connected to his digital set-top box 400 (step S40). At this time, the talk content of the receiver is collected through the microphone 14 of the remote control 500, the voice is processed by the voice processing means 40 and then wirelessly transmitted to the receiver's digital set-top box 400, the receiver's The digital set-top box 400 transmits the voice signal of the receiver to the service providing apparatus 100 through the system operating apparatus 300, and the service providing apparatus 100 transmits the voice signal to the system operating apparatus 300. Send to the sender's digital set-top box 400 through the speaker of the caller's television.

If the digital set-top box 400 of the receiver receiving the video call reception signal from the service providing apparatus 100 is in an off state (step S42), the service providing apparatus 100 is the system operating apparatus 300. Receives a caller's video message input through the recording and stores in the first storage in the internal. Alternatively, the service providing apparatus 100 may send the sender's video message to the receiver's digital set-top box 400 and record / store the message in the receiver's digital set-top box 400 (step S44).

Thereafter, when the receiver accesses the homepage of the service providing apparatus 100 through the Internet 200 using a computer (not shown) outside the home and requests reading ("Yes" in step S46), the service is provided. The apparatus 100 transmits the image message of the caller for the corresponding receiver previously stored to the recipient's computer (not shown) through the Internet 200, thereby enabling the reading (step S48).

In addition, the receiver does not look at the remote location in absence (“No” in step S46), and the receiver returns home and grasps the existence of the image message that came to him through the digital set-top box 400 of the receiver. It can be checked later (step S50).

In the present invention as described above, when the caller is watching a television, a remote family member or friend reminds them of the PIP window of the television, finds the ID of the other party (recipient) put in the address book, and finishes the call. If you were watching the caller's appearance on the other party's PIP window, the video call while watching each other's PIP window. And, even if the recipient is not in the seat is stored as a missed image message can be easily confirmed by the digital set-top box 400, as well as access to the home page of the service providing apparatus 100 can be confirmed.

In addition, in the present invention, the sub-screen is displayed during recording, so that the video call with the desired counterpart can be recorded with the recording.

As described in detail above, according to the present invention, the VDSL transmission method is performed by using a digital set-top box and a system operating apparatus capable of up to 25 Mbps and 12 Mbps simultaneously in spite of using an existing telephone network, thereby preventing any use of a general telephone. It is possible to make high quality video calls without real time, and simultaneously make video calls through multiple PIP windows.

In addition, the user can view the image message recorded in the absence by using the homepage of the service providing apparatus anytime and anywhere when outside.

On the other hand, the present invention is not limited only to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, the technical idea to which such modifications and variations are also applied to the claims Must see

1 is a configuration diagram of a system to which an embodiment of the present invention is applied;

2 is an internal configuration diagram of the digital set-top box shown in FIG.

3 is an internal configuration diagram of a remote controller shown in FIG. 1;

4 is a flowchart illustrating a video call process at a caller side in a video call service method using a digital set-top box according to an embodiment of the present invention;

5 is a flowchart illustrating a video call process at a receiver side in a video call service method using a digital set-top box according to an embodiment of the present invention.

?? Explanation of symbols for main parts of the drawings

10: key input unit 12: memory

14 microphone 16: sampling unit

18: quantizer 20: encoder

22: control unit 24: infrared signal generator

26: infrared transmitter 40: voice processing means

100: service providing device 200: Internet

300: system operation unit 400: digital set-top box

500: remote control

Claims (4)

delete User's digital set-top box that receives the service contents selected by the user via VDSL's telephone line and displays them on a television in real time, is connected to a plurality of audio / video input sources, and wirelessly receives a voice signal from a remote controller with a built-in microphone. ; A system operating device installed at a predetermined unit of area and relaying service contents required by the digital set-top box in real time by two-way data communication with an arbitrary digital set-top box; And a service providing apparatus for providing corresponding service contents to a corresponding system operating apparatus in real time according to a service content request from the system operating apparatus input through the Internet. After the video call service is selected from the category on the initial screen of the television connected to the sender's digital set-top box, the recipient to be called is designated by address book search or the ID input of the receiver. Transmitting a designated receiver information to the service providing apparatus through the system operating apparatus; A second step of the service providing apparatus transmitting a video call reception signal to a digital set-top box of a corresponding receiver based on the receiver information; A third step of making a video call with the receiver by making a call connection to a sub-screen of a television connected to the sender's digital set-top box when the receiver has approved the video call; A fourth step of, if the receiver is absent, recording a predetermined video message according to the caller's selection of whether to record the video message, and transmitting the recorded video message to the service providing apparatus through the system operating apparatus and storing it; And And a fifth process of the service providing apparatus transmitting the predetermined video message to the digital set-top box of the corresponding receiver through the system operating apparatus. delete User's digital set-top box that receives the service contents selected by the user via VDSL's telephone line and displays them on a television in real time, is connected to a plurality of audio / video input sources, and wirelessly receives a voice signal from a remote controller with a built-in microphone. ; A system operating device installed at a predetermined unit of area and relaying service contents required by the digital set-top box in real time by two-way data communication with an arbitrary digital set-top box; And a service providing apparatus for providing corresponding service contents to a corresponding system operating apparatus in real time according to a service content request from the system operating apparatus input through the Internet. When the receiver receives a connection with the digital set-top box of the receiver receiving the video call reception signal from the service providing apparatus, the call is connected to the sub-screen of the television connected to the digital set-top box of the receiver to connect with the caller. A first step of making a video call; A second process of receiving and recording / saving a caller's video message input through the system operating apparatus when the digital set-top box of the receiver receiving the video call reception signal from the service providing apparatus is turned off; ; And As the receiver accesses the service providing apparatus through the Internet using a computer outside the home and requests reading, the service providing apparatus receives the caller's video message for the previously stored corresponding receiver through the Internet. Transmitting to the third process; A fourth step of checking whether the receiver returns home and checks the existence of the image message that came to him through the receiver's digital set-top box; Video call service method using a digital set-top box, characterized in that provided.