KR20070039669A - Video conference system - Google Patents

Abstract

The present invention relates to a videoconferencing system, which is compatible with videoconferencing communication terminals having different specifications as well as various displays having different specifications and standards, thereby making it easy to perform video conferencing. Disclosure of Invention Disclosed is a video conferencing method, which is equipped with a signal processing unit for processing and outputting a signal in accordance with a specification and a videoconferencing procedure, and enables video conferencing without distorting the screen, not only in various communication terminals but also in displays having different standards. .

The present invention, a signal input unit for receiving a plurality of different video, audio and data; A synchronization signal generator for controlling image, audio, and data signal processing of the signal input unit; An addition control unit for adding the synchronization signal generator and a signal input unit for inputting the various signals; A central processing unit including a multi / demultiplexer which controls the signal processing controller and sequentially outputs the video and audio processed signals through the modem so that an overlay portion does not conflict with each other; A modem unit for transmitting the synchronous controlled reception side signal through a communication network; It is composed of a communication network unit connecting the receiving side modem unit and the transmitting side, and it is possible not only to interconnect with various communication terminals having different specifications and specifications for video conferencing and video chatting with a PC terminal in a video conference of a computer, but also various displays. The present invention relates to a video conferencing system that is compatible with devices such as PDP, LCD, TV, and PC.

Video conferencing, audio / video / data signal frames, sync signal generators, sync signal detectors, communication terminals, PDPs, TVs, telephone networks.

Description

Video conference system {Video conference system}

1 is a block diagram of a transmitting and receiving side in a videoconferencing system according to an embodiment of the present invention.

2 is a block diagram showing a videoconferencing system capable of interconnecting videoconferencing terminals of different specifications according to an embodiment of the present invention.

3 is a block diagram showing the configuration of a transmitting and receiving side in a conventional videoconferencing system.

**** Explanation of symbols on the main parts of the drawing ****

10,10 ': Audio signal frame 11, 21, 31: Sync signal generator

20, 20 ': video signal frame 30, 30': data signal frame

12, 22, 23: first, second and third addition control unit 40, 40 ': central processing unit

60, 60 ': synchronization controller 100: communication network

110, 150: communication terminal connection unit 130, 170: communication terminal signal processing unit

200: buffer and switching unit 300: conventional communication terminal connection unit

400: communication terminal signal processor of the prior art

500: prior art buffer and switching unit

The present invention relates to a video conference system. Specifically, the present invention connects video telephony communication terminals of different specifications and standards to add a synchronization signal to each signal transmitted between video conferencing systems, and to receive a signal received by making the video conferencing system synchronized with both or multiple parties. Resolves a problem that may cause inconsistency in restoration of original data during playback of video data. In addition to audio or video during video conferencing, it is possible to conduct meetings using various communication terminal media. Furthermore, PDP, The present invention relates to a videoconferencing system that is compatible with various display devices having different characteristics and specifications such as LCDs.

Video conferencing system is a system that allows multiple people to have a meeting while looking at each other's face at the same time by using dedicated equipment for screen synthesis, separation, compression transmission, etc. based on a relay camera.

In recent years, with the development of computer and communication technology, attempts have been made to comprehensively manage various media through computers. For example, media that have been processed through different organizations such as telephones, TVs, document writers, etc. can be integrated into one video conferencing system where people in remote locations can simultaneously exchange voice and video with each other and immediately exchange necessary documents. Was done. Multi-point communication, which enables the video conference system, is a method of receiving a signal from each communication point from a multipoint control unit (MCU) and transferring the signal back to another terminal. The conventional video conferencing system has a problem in that MCUs must be separately constructed because they are incompatible with different terminal types. As shown in FIG. 3, the conventional MCU apparatus is configured such that multiple terminals of the same standard can be connected to each other. The signal processing unit processes the signal so that each signal transmitted through the network connection unit is transmitted to another communication terminal. The switching unit is configured to transfer the signal processed data to another terminal in accordance with the videoconferencing progression. That is, the terminals of the same model are configured to exchange data with each other through a network. However, it is not possible to exchange data between different types of terminals. In addition, since there is no signal for synchronizing each transmitted signal, there may be a case where the restoration of the original data is inconsistent when the received signal is reproduced, and thus, PDP, TV, LCD having various sizes and large displays. It has a problem that is incompatible with the back.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems in the technical field to which the present invention pertains, and the present invention discloses an entirely new videoconferencing system, which is not known in the art or compared to the conventional art.

A specific object of the present invention has been proposed to solve the above-described problems, by connecting video telephony communication terminals of different specifications and standards to add a synchronization signal to each signal transmitted between video conferencing systems, and to which a video conferencing system is connected. Alternatively, it is possible to proceed with a conference using various communication terminal media as well as audio or video during a video conference by solving a problem that the restoration of the original data may be inconsistent when the received signal is reproduced by synchronizing with the multiparty. Furthermore, the present invention relates to a video conferencing system that is compatible not only with a general PC monitor but also with various display devices having different characteristics and specifications such as PDP and LCD. In other words, a video conferencing system that is limited to PC cameras and cannot be interconnected with other types of communication terminals without departing from 1: 1 communication, and a communication network of a corresponding standard so as to enable connection with communication terminals having different specifications and specifications. The network connection means having a connection portion and the image data connected to and corresponding to the network connection means are selectively processed by signal processing in accordance with a corresponding standard, and at this time, in the signal processing, a synchronization signal is transmitted to a transmission signal at the receiving side. By reconstructing the received signal in synchronization, the video conferencing system can be compatible with a large display of various sizes.

The object of the present invention is not limited to the above object. Other objects of the present invention that are not mentioned will be clearly understood by those skilled in the art from the following description and the accompanying drawings. Of course, this also belongs to the object of the present invention.

The present invention for achieving the above object, and the audio signal frame for transmitting and receiving audio data (10, 10 '); A synchronization signal generator (11, 11 ') for generating and detecting a synchronization signal for transmitting and receiving a predetermined audio; First and second addition controllers 12, 22, 23, and 12 'that receive the output of the audio signal frames 10 and 10' and receive the audio synchronization signal and insert the audio synchronization signal into the audio data. , 22 ', 23'); Video signal frames 20 and 20 'for transmitting and receiving video data; Data signal frames 30 and 30 'for transmitting and receiving predetermined data; A central processing unit (40, 40 ') for receiving and outputting the control adding unit, the video signal frame, and the output of the data signal frame, and providing the received signal to the corresponding frame on the transmitting and receiving side; A synchronization controller (50, 50 ') for controlling the output of the central processor; A modem unit (60, 60 ') which receives the output of the central processing unit and performs a predetermined demodulation process between the transmitting and receiving sides; Communication network unit 100 for connecting both sides of the transmission and reception side through the modem unit; A communication network connection unit (110, 170) capable of connecting communication terminals between both transmitting and receiving sides in the communication network unit; Signal processing units (130, 150) for inputting and processing image data input from the communication network connection unit according to a corresponding specification and standard; And a buffer and a switching unit 80 that receive the signal processed from the input / output signal processor and select one of the signals and information applied from each connection unit according to a selection signal and information applied from the outside.

On the other hand, in the communication network unit, Figure 2 is a block diagram showing the MCU device capable of mutual communication between the heterogeneous communication terminals in the videoconferencing system to which the present invention is applied, so that it is possible to connect to communication terminals of different standards. It includes a communication network connection means having a communication network connection unit of the corresponding standard, corresponding to the respective network connection portions 111, 112, 113 of different models constituting the communication network connection means, input video conference data It includes a signal processor 110 having a signal processor (131, 132, 133) for signal processing according to the corresponding standard and output.

According to the present invention as described above, a synchronization signal is inserted into each transmitted signal and transmitted, the priority is selected according to the user's selection, and transmission and reception are performed according to the selected priority.

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

1 is a block diagram showing a configuration of a transmitting and receiving side in a videoconferencing system according to an embodiment of the present invention, and FIG. 2 is an image capable of interconnecting different types of videoconferencing media according to an embodiment of the present invention. 3 is a configuration diagram illustrating a conference system, and FIG. 3 is a configuration diagram of the related art of FIG. 2. As shown in Fig. 2, the configuration of the transmitting side of the videoconferencing system according to the first embodiment of the present invention includes an audio signal frame 10, a video signal frame 20, and a data signal frame 30; Central processing controller 40, first to third synchronization signal generators 11 21 and 31, first to third control adders 12, 22 and 23, synchronization controller 50, modem It contains 60.

The first to third synchronization signal generators 11 21 and 31 generate a predetermined synchronization signal and provide the predetermined synchronization signal to the first to third control adders 12, 22, and 23. The first to third control adders 12, 22, and 23 respectively receive outputs of the audio signal frame 10, the video signal frame 20, and the data signal frame 30, respectively. The synchronization signals AS, VS, and DS are inserted into the audio frame AF, the video frame VF, and the data frame DF, respectively, and are output to the central processing controller 40.

The synchronization controller 50 controls the central processing controller 40 to selectively give priority to the synchronization signal. In other words, the audio, video, and data signals may be selectively prioritized to give priority to the selected signals according to more efficient transmission and user selection.

The receiving side has an audio signal frame 10 'and a video signal frame 20', a data signal frame 30 ', a central processing controller 40', and a first to third synchronization signal detection unit 12. '), First to third addition control units 12', 22 '23', synchronous control unit 50 ', and modem unit 60'. The first to third sync signal detectors 20 ', 22', and 23 'are configured to transmit a signal transmitted from the transmitter through the central control processor 40' to the audio signal frame 10 'and a video signal frame. If the data signal frame 30 'is input to the signal 20', the synchronization signal AS, VS, and DS are respectively detected to restore the original signal. The function of the synchronization controller 50 'is the same as that of the synchronization controller 50 on the transmitting side.

In addition, the central processing control unit multiplexes sequentially and outputs the signal to the modem unit regardless of the presence or absence of a signal input from each of the frames. In general, audio data often occurs continuously. However, in the case of video data, it is about 1 to 5 (frames / sec) depending on the efficiency of the compression and decoding process, and the generation of such video data occurs randomly. The data output from the data frame is also randomly generated.

As described above, each signal can be transmitted / received by setting the same mode at the transmitting side and the receiving side to selectively have priority.

On the other hand, the signal entered through the modem unit 60 of the transmitting side is transmitted to the communication network unit 100, wherein the signal and information processed by the modem unit 60 is the specification in the communication network connection unit 110 of FIG. In order to be able to access different terminals, the first connection part of the corresponding standard, that is, the PSTN connection part 111 that can be connected through a public telephone network, the ISDN connection part 112 that can be connected through ISDN, and the LAN can be connected through Each of the first signal processing units 131, 132, and 133 connected to a rear end of each of the connection units 111, 112, and 113 is configured as a LAN connection unit 113 that can be connected through a LAN. The video conferencing data applied from the fields 111, 112, and 111 are signal-processed to meet the standard of the communication terminal.

The second buffer and the switching unit 80 receive signals processed from the respective first signal processing units 131, 132, and 133 and apply the signals from the connection units according to a conference situation, that is, a selection signal applied from the outside. Select one of the signals to be output. The output signal is received by the second signal processing unit 150 again before being sent to the modem of the receiving side, and the received signals are applied to the second connection units 170 to provide communication terminals having different specifications. Is transmitted to the receiving modem 60 '. The signals and information transmitted to the receiving side modem continue to operate according to the configuration disclosed on the receiving side.

Although the present invention has been described and described above, it is presented as at least one or more embodiments, and thus, the technical spirit, construction, and operation of the present invention are not limited thereto. The detailed description set forth above is intended to be considered illustrative rather than limiting. The above is for the purpose of understanding. Applicant intends to limit the scope of the invention by the claims of the following claims, which include all equivalents of the above. Persons skilled in the art may be variously changed, some or all of the configurations may be equivalently substituted for carrying out the same purposes of the present invention without departing from the scope of the technical spirit and technical configurations set forth in the claims below. It will also be appreciated that embodiments that are modified in part or fall within the scope of the claims. Since the invention can be embodied in many different forms within the scope of the appended claims, the disclosure and the modifications and variations thereof based thereon will be clearly understood.

The present invention made as described above is possible only between communication terminals of the same type, and by connecting the video telephone communication terminals of different specifications and standards by improving the conventional technology that did not solve the noise of information due to unstable signal processing By adding a synchronization signal to each signal transmitted between videoconferencing systems and synchronizing the two or more parties to which the videoconferencing system is connected, a problem may occur in which restoration of original data may be inconsistent when the received signal is reproduced. In addition to the transmission and reception of voice, video, and data during video conferencing, it is possible to conduct meetings using various communication terminal media. Furthermore, not only general PC monitors, but also various display devices having different specifications and specifications such as PDPs and LCDs can be used. It provides the advantage of making it compatible.

Claims (4)

In video conferencing systems: An audio signal frame for transmitting and receiving audio data; First to third synchronization signal generators on a transmitting side for generating a synchronization signal for transmitting and receiving audio; First to third synchronization signal detection units on a receiving side for detecting a synchronization signal for transmitting and receiving audio; First and second addition controllers configured to receive an output of the audio signal frame, receive the audio synchronization signal, insert an audio synchronization signal into audio data, and output the audio synchronization signal; A video signal frame for transmitting and receiving video data; A data signal frame for transmitting and receiving predetermined data; A central processing control unit which receives the addition control unit, a video signal frame, and an output of a data signal frame and outputs the received signal to a corresponding frame of a transmitting and receiving side; A synchronization controller for controlling an output of the central processor; A modem unit receiving the output of the central processing unit and performing a predetermined demodulation process between the transmitting and receiving sides to provide the central processing control unit; A communication network unit for connecting both sides of the transmitting and receiving side through the modem unit; A communication network connection unit capable of connecting communication terminals between both transmitting and receiving sides in the communication network unit; A signal processing unit which processes and inputs and outputs image data input from the communication network connection unit according to a corresponding specification and standard; And a buffer and a switching unit configured to receive signals processed by the input / output signal processor and to select and output one of a signal and information applied from each connection unit according to a selection signal and information applied from the outside. Conference system. The method of claim 1, And a signal applied from the signal processor to be interconnected between communication terminals of video conferencing having different specifications and standards. The method of claim 1, Video conferencing system that is compatible with not only general PC monitors but also various display devices with different characteristics and specifications such as PDP and LCD. In a video conference system, The signal processing unit is provided with a communication network connection unit of a corresponding specification and standard so as to enable connection with communication terminals having different specifications and standards, and is connected correspondingly to each other. And a buffer and a switching unit for selectively outputting a signal output from the signal processing unit of the signal processing unit, so that videoconferencing communication terminals having different specifications and standards can be interconnected.

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