KR20040107789A - Device and the Method for video communication using video on demand phone - Google Patents

Abstract

PURPOSE: A picture communication system and method using VOD(Video On Demand) terminals is provided to achieve high-quality, inexpensive picture communication by compressing picture communication data using the image compression and voice compression of VOD terminals, transmitting the compressed data to computers using short-range communication, and executing picture communication through the Internet. CONSTITUTION: The image and voice data of VOD terminals(142a,142b) are transmitted through the Internet(200) as a picture communication terminal function in the VOD terminals(142a,142b) is combined with an Internet service function in computers(106a,106b). The VOD terminals(142a,142b) and the computers(106a,106b) are connected through not only a cable, but also short-range communication, such as Bluetooth, IrDA(Infrared Data Association), etc. The VOD terminals(142a,142b) execute voice and image data compression. The compressed voice and image data are transferred to the computers(106a,106b). The compressed and transferred voice and image data are converted in the form of UDP(User Datagram Protocol)-IP(Internet Protocol) packets, and the converted data are transmitted to the Internet.

Description

Device and the method for video communication using video on demand phone}

The present invention relates to a video communication apparatus and a method using a VOD terminal, and more particularly, to compress video communication data using video and voice compression of a VOD terminal, and then to a short range such as Bluetooth or infrared wireless communication (irDA). The present invention relates to a video communication apparatus and method using a VOD terminal that enables video communication through a wired Internet network after transmission to a computer using communication.

Recently, mobile communication terminals having a multimedia function, which enables video display, are being introduced in recent years, when IMT-2000 (International Mobile Telecommunications-2000) technology is being pushed forward.

As such, the mobile communication terminal with a video function (hereinafter referred to as 'VOD terminal') is larger than before and adopts a color LCD (Liquid Crystal Display) instead of a single color to enable video on demand (VOD), and When installed, users of a video terminal can make a video call while looking at each other's video.

These videos use standard coders (coder / decoder) because they must be able to be played on any video device. The most common ones are MPEG-4 (Moving Picture Expert Group-4) and H.263, 26L. Bit rate compressed video codecs.

In the above-mentioned conventional mobile communication terminal, the video communication using the wired Internet network is mostly performed by attaching a camera, a microphone, a speaker, or headphones to a computer.

Video and audio data from cameras and microphones are transmitted over the wired Internet network, and video and audio compression is mostly done in software on a computer.

Since video and audio retransmission is meaningless in video communication, user datagram protocol (UDP) is used instead of transmission control protocol (TCP).

In the conventional video communication technology, a method of directly connecting to a computer is used to process audio and video compression in software, so it is not possible to adopt a compression technology having excellent performance and to add additional equipment such as a camera, a microphone, and headphones. If a purchase is required, and a terminal capable of a video call is used, there is a problem that a new expensive video phone must be purchased.

Accordingly, the present invention has been proposed to solve the above-described problems, and compresses video communication data using video and voice compression of a VOD terminal, and then uses short-range communication such as Bluetooth or infrared wireless communication (irDA). It is an object of the present invention to provide a video communication device and a method using a VOD terminal that enables video communication through a wired Internet network after transmission to a computer.

In addition to the method of directly connecting to a computer, there is a method using a mobile communication terminal capable of making a video call. In the case of voice, such a video phone includes a function for compressing voice or video in the mobile communication terminal itself. In the case of G.729 and G.723.1 video, image data is compressed using H.260 and H.263.

In order to achieve the above object, the present invention provides a video communication apparatus using a mobile communication terminal, comprising: a mobile communication terminal having a short-range wired / wireless transceiver and generating and compressing and decompressing video and audio data necessary for video communication; It comprises a computer that transmits and receives video and audio data necessary for video communication from the mobile communication terminal to the packet data to be transmitted to the Internet through a predetermined protocol.

The short-range wired / wireless transceiver selects and processes any of short-range wired / wireless communication methods such as infrared wireless communication (IrDA), Bluetooth, RS-232, and USB.

The present invention provides a video communication method using a mobile communication terminal, comprising: converting an audio signal and an audio signal, which are analog signals, to a digital signal, and then compressing the digital signal and transmitting the same to a transmitting computer; Receiving compressed data from the packet data and delivering the packet data to a receiving computer through an internet network; and receiving the packet data through the internet network and delivering the received packet data to a receiving terminal; The terminal includes decompressing packet data received from the receiving computer, converting the packet data into an analog signal, and outputting audio and video to the receiving terminal.

The communication between the terminal and the computer selects any of short-range wired and wireless communication methods such as infrared wireless communication (IrDA), Bluetooth, RS-232, and USB.

The outputting of the voice and video to the receiving terminal may also be output to the receiving computer.

1 is a block diagram showing the internal operation of a VOD terminal capable of a two-way video communication service to which the present invention is applied.

2 is a block diagram of a video communication apparatus using a VOD terminal according to an embodiment of the present invention.

3 is a flowchart showing the overall transmission operation flow according to the video communication method using the VOD terminal of the present invention.

4 is a flowchart showing an overall reception operation flow according to a video communication method using a VOD terminal of the present invention.

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

1 is a block diagram showing the internal operation of a VOD terminal capable of a two-way video communication service to which the present invention is applied.

Referring to FIG. 1, the controller 100 controls the overall operation of the mobile communication terminal 142 to perform a voice call and various multimedia functions.

In addition, if there is a video communication mode request from a user to implement a two-way video communication service, the codec 102 controls the decoded and decoded still picture or video communication data wirelessly received from an external network. The still picture or video communication data input from the input unit 104 is encoded and then compressed into a predetermined format of JPEG / MPEG and controlled to be transmitted / received to an external network or an external computer 106.

The memory 108 stores a predetermined program for controlling the overall operation of the terminal, and stores data input and output when the overall operation of the terminal is performed by the controller 100 in a predetermined area.

The RF (Radio Frequency) unit 110 refers to a comprehensive component of a high frequency processing unit, an intermediate frequency processing unit and a baseband processing unit. The RF unit 110 not only receives audio and various multimedia data from an external network received through an antenna ANT, but also through an external network. The still image or video communication data received wirelessly is first processed at a wireless communication band frequency, and the intermediate frequency processing is lowered back to a lower frequency band, and this is processed again as a signal of a frequency band that can be processed by the controller 100.

In addition, various still images or image communication data inputted from the image input unit 104 provided in the terminal and encoded and compressed by the codec unit 102 are modulated into wireless communication band frequency signals and wirelessly transmitted to an external network.

The audio unit 112 modulates the voice signal input through the microphone MIC into a wireless signal under the control of the controller 100, and demodulates the wireless signal received through the RF unit 110 to the speaker SPK. It is sent as an audio signal.

In addition, in the video call mode, the wireless audio signal included in the still picture or the video communication data received from the RF unit 110 is demodulated and reproduced through a speaker SPK.

The key input unit 114 has a plurality of function keys including a plurality of numeric keys and a video communication mode key implemented to set a video communication mode for a bidirectional video communication service in a terminal, and when a user presses a predetermined key The corresponding key data is generated and output to the controller 100.

The first display unit 116 includes a liquid crystal display (LCD) for displaying various types of information of the terminal in a normal call mode, and displays key data generated by the key input unit 114 and various information signals of the controller 100. Receives input and displays it.

The second display unit 118 is a still image or image received from the image input unit 104 or an external network in the image communication mode and a still image or image input from the external computer 106 through the short-range wired / wireless transceiver 120. Display communication data in color.

The image input unit 104 is for a bidirectional video communication service. The image input unit 104 inputs the image of the user or various still image image communication modes of the calling terminal user as image communication data to the codec unit 102 in the image communication mode.

The codec unit 102 converts the captured image signals Y and C provided from the image input unit 104 into JPEG or MPEG format under the control of the control unit 100, compresses them at a predetermined rate, and wirelessly receives them from an external network. The compressed image of the still image or the image communication data is decompressed, decoded, and applied to the second display unit 118.

The still picture or video communication data wirelessly received from the external network may be a still picture or video communication data transmitted from a counterpart terminal in a call and a web server connected to a mobile switching center (not shown). or various Video On Demand (VOD) data provided from a plurality of image contents servers.

The short-range wired / wireless transceiver 120 wirelessly transmits various still images or video communication data in the terminal to the external computer 106, or wirelessly receives still images or video communication data of the external computer 106. Transfer to section 102.

The terminal of the present invention is connected to the external computer 106 through the short-range wired and wireless transceiver 120 to transmit / receive image data.

The short-range wired / wireless transceiver 120 uses a short-range wired / wireless communication method such as infrared wireless communication (IrDA), Bluetooth, RS-232, or USB.

2 is a block diagram of a video communication apparatus using a VOD terminal according to an embodiment of the present invention, and serves as a video communication terminal of the VOD terminals 142a and 142b and an Internet service function of the computer 106a and 106b. Combined to transmit the video and audio data of the VOD terminals 142a and 142b using the Internet network 200 section.

The connection between the VOD terminals 142a and 142b and the computers 106a and 106b uses not only wired cables but also short-range wireless communication schemes such as infrared wireless communication (IrDA) and Bluetooth.

The VOD terminals 142a and 142b provide a camera, a microphone, a speaker, and an LCD display function and play a role in compressing audio and video data.

Although voice compression differs depending on the wireless communication method, most of them perform high-performance, high-quality voice compression, and video compression mainly uses H.260 and H.263.

Most of the functions to be performed by the VOD terminals 142a and 142b relate to audio and video compression.

The compressed data is transmitted to the computers 106a and 106b in the various wired and wireless manners described above, and the compressed video and audio data transmitted to the computers 106a and 106b are User Datagram Protocol (UDP) => IP (Internet Protocol). The packet is converted into a packet and transmitted to the internet network 200.

3 is a flowchart illustrating an overall transmission operation flow according to a video communication method using a VOD terminal according to the present invention, which will be described with reference to FIGS. 1 and 2 together.

When a transmission operation for video communication is started, audio and video signals are input 301 through the VOD terminal 142a.

The audio signal is input through a microphone of the VOD terminal 142a, and the video signal is input through a camera of the VOD terminal 142a.

The audio and video signals, which are the analog signals input 301, are converted 302 into digital signals by the image input unit 104 and then compressed 303 by the codec unit 102.

The audio and video signals compressed 303 by the codec unit 102 are transmitted to the computer 106a through the short-range wired / wireless transceiver 120.

At this time, the transmission 304 through the short-range wired / wireless transceiver 120 selects and transmits any of short-range wired / wireless communication methods such as infrared wireless communication (IrDA), Bluetooth, RS-232, and USB.

The compressed voice and video data transmitted to the computer 106a (304) is RTP (Real-time Transport Protocol) => UDP (User Datagram Protocol) => IP (Required) according to a predetermined protocol (e.g., H.323). Internet Protocol) is converted into a packet and transmitted to the Internet network 200.

4 is a flowchart illustrating an overall reception operation flow according to a video communication method using a VOD terminal according to the present invention, which will be described with reference to FIGS. 1 and 2 together.

When the reception operation for video communication is started, the packet data received 401 by the computer 106b through the Internet network 200 is performed by the computer 106b.

That is, the packet data received in the form of a packet is received by the computer 106b as compressed data through the process of IP => UDP => RTP.

The compressed video and audio data received by the computer 106b are transmitted 402 to the short-range wired / wireless transceiver 120 of the VOD terminal 142b through a wired cable (RS-232), Bluetooth, or infrared wireless communication method. .

The compressed video and audio data transmitted 402 to the short-range wired / wireless transceiver 120 of the VOD terminal 142b are decompressed by the codec unit 102 of the VOD terminal 142b and then decoded. Through this, the digital signal is converted into an analog signal (404) and made into an actual audio and video signal.

The audio signal is output to the receiver or the speaker of the VOD terminal 142b and the video signal is output 405 to the second display unit 118 of the VOD terminal 142b.

At this time, since the LCD window of the VOD terminal 142b is generally small, if the user wants to display it using the monitor of the computer 106b, the decoded image data is sent back to the computer 106b through the short-range wired / wireless transceiver 120 to the computer 106b. Image data may be viewed by the computer 106b.

As described in detail above, the present invention compresses video communication data by using video compression and voice compression of a VOD terminal, and then transmits the data to a computer using a short-range communication such as Bluetooth or infrared wireless communication (irDA) and then connects the wired Internet network. By enabling the video communication through, it provides a useful effect of high quality and low cost video communication.

That is, the video communication data is transmitted and received through a computer rather than transferred to a mobile communication, so there is no need to pay for a mobile communication service.

In addition, since the computer uses a high performance and high quality encoder of the terminal rather than a video and audio compression method, the quality of video communication can be improved.

Claims (5)

In the video communication apparatus using a mobile communication terminal, And a mobile communication terminal having a short distance wired / wireless transceiver and generating and compressing and decompressing video and audio data necessary for video communication. Video communication using a VOD terminal, characterized in that it comprises a computer for transmitting and receiving video and audio data necessary for video communication from the mobile communication terminal through the wired and wireless communication to the Internet network through a predetermined protocol Device. The method according to claim 1, The short-range wired / wireless transceiver is a video communication device using a VOD terminal, characterized in that for processing any selected among the short-range wired and wireless communication methods such as infrared wireless communication (IrDA), Bluetooth, RS-232, USB. In the video communication method using a mobile communication terminal, When an audio and video signal, which is an analog signal, is generated in a transmitting terminal, converting the digital signal into a digital signal, compressing the signal, and transmitting the same to a transmitting computer Receiving, by the transmitting computer, the compressed data from the transmitting terminal into packet data and transmitting the compressed data to the receiving computer through an internet network; The receiving computer receiving the packet data through the Internet network delivers the received packet data to the receiving terminal; And the receiving terminal decompresses the packet data received from the receiving computer, converts the packet data into an analog signal, and outputs audio and video to the receiving terminal. The method according to claim 3, The communication between the terminal and the computer is a video communication method using a VOD terminal, characterized in that for selecting any one of the short-range wired and wireless communication methods such as infrared wireless communication (IrDA), Bluetooth, RS-232, USB. The method according to claim 3, The outputting of the audio and video to a receiving terminal may be output to a receiving computer.