KR0137556B1 - A terminal of high speed video conference through bri of isdn - Google Patents
A terminal of high speed video conference through bri of isdnInfo
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- KR0137556B1 KR0137556B1 KR1019940035065A KR19940035065A KR0137556B1 KR 0137556 B1 KR0137556 B1 KR 0137556B1 KR 1019940035065 A KR1019940035065 A KR 1019940035065A KR 19940035065 A KR19940035065 A KR 19940035065A KR 0137556 B1 KR0137556 B1 KR 0137556B1
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- video
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
본 발명은 고속데이타 제어신호에 따라 상기 다중화/역다중화수단에서 출력되는 영상제어신호를 FEC수단으로 출력하는 제1단속수단과, 상기 고속데이타 제어신호에 따라 상기 다중화/역다중화수단에서 출력되는 영상제어신호 또는 데이타제어신호를 직렬 데이타 전송수단(SIO)로 출력하는 제2단속수단을 구비하는 것을 특징으로 하는 ISDN(Integrated Services Digital Network) BRI(Basic Rate Interface) 고속 영상회의 단말장치 관한 것으로, 일시적으로 영상, 음성을 전체 혹은 보내고자 하는 데이타의 양에 따라 영상에 할당 되었던 대역만을 삭제함으로써 고속의 데이타 송수신이 가능하며, 데이타 송수신이 완료된 후 원래의 영상회의 상태로 복원이 가능한 상기와 같은 영상회의 단말에 대한 부가 기능은 사용자 측면에서 매우 유용한 서비스로 제공되어질 수 있는 효과가 있다.The present invention provides a first control means for outputting an image control signal output from the multiplexing / demultiplexing means to a FEC means according to a high speed data control signal, and an image output from the multiplexing / demultiplexing means according to the high speed data control signal. An integrated services digital network (ISDN) basic rate interface (BRI) high speed videoconferencing terminal apparatus comprising a second control means for outputting a control signal or a data control signal to a serial data transmission means (SIO). It is possible to send / receive data quickly by deleting only the band allocated to the video according to the amount of video or audio or the amount of data to be sent, and the video conferencing can be restored to the original video conference state after the data transmission and reception is completed. Additional functions for the terminal can be provided as a very useful service from the user's perspective There is.
Description
제1도는 본 발명이 적용되는 ISDN BRI 영상회의 단말 구성도,1 is a block diagram of an ISDN BRI video conferencing terminal to which the present invention is applied;
제2도는 본 발명에 따른 고속 영상회의 단말장치의 구성 블록도,2 is a block diagram of a high speed videoconferencing terminal device according to the present invention;
제3도는 H.221 다중화 프레임 포맷도.3 is an H.221 multiplexed frame format diagram.
본 발명은 종합정보통신망(ISDN) BRI(Basic Rate Interface) 고속영상회의 단말장치 관한 것이다.The present invention relates to an integrated information communication network (ISDN) BRI (Basic Rate Interface) high speed video conference terminal.
국제전기통신연합 전기통신표준화분야(ITU-TS)의 H 시리즈 권고안에 ISDN (Integrated Services Digital Nertwork) 환경하에서의 영상전화 및 영상 회의 단말의 표준안이 제정된바 있다. 이에따라 이미 상용화 서비스를 개시하고 있는 국내 ISDN상에서의 영상 전화 및 영상 회의 단말은 향후 빠른 속도로 보급, 활성화될 것이다.The H Series Recommendation of the International Telecommunication Union Telecommunication Standardization (ITU-TS) has established standards for video telephony and video conferencing terminals under an Integrated Services Digital Nertwork (ISDN) environment. Accordingly, video telephony and video conferencing terminals on domestic ISDN, which have already begun commercialization services, will be rapidly spread and activated in the future.
현재 기 구현되어 있는 영상회의 단말은 영상 신호, 음성 신호 그리고 데이타를 H.242 권고안에 따른 절차에 따른 사용자의 요구에 따라 전체 사용 가능한 ISDN BRI 대역폭 128Kbps를 가변적으로 개별 미디어에 할당, H.221 권고안에 따른 다중화/역다중화를 거쳐 송수신된다.Currently implemented video conferencing terminals allocate video signals, audio signals and data to individual media variably by allocating 128 Kbps of ISDN BRI bandwidth that can be used according to the user's requirements according to H.242 Recommendations. Transmit / receive through multiplexing / demultiplexing according to
이 경우 영상회의 도중 대량의 정보를 빠른 속도로 송수신 하려 할때, 전체 대역폭 중 영상, 음성을 제외한 비교적 저속의 데이타 송수신 대역만을 할당 받아야 한다는 제한을 받게 되며, ISDN BRI내 2개의 B 채널간의 동기 문제, 즉 비트 통합(integration)을 보장하지 못함으로써 동일한 화일이나 데이타를 두개의 64Kbps B 채널에 걸쳐 보낼 수 없었던 문제점이 있었다.In this case, when trying to transmit and receive a large amount of information at high speed during a video conference, only a relatively low data transmission / reception band should be allocated except for video and audio, and there is a synchronization problem between two B channels in an ISDN BRI. In other words, there was a problem in that the same file or data could not be transmitted over two 64 Kbps B channels by not guaranteeing bit integration.
따라서 상기와 같은 종래기술의 문제점을 해결하기 위하여 안출된 본 발명은, ISDN BRI 송수신 가능 대역폭 한도 (128Kbps) 에서 가능한 고속의 데이타 송수신 속도를 실현하고 또한 영상 회의 도중에 고속 데이타 송수신을 위해 통화를 끊지 않고 단지 음성 및 영상에 할당 하였던 대역폭을 사용자간의 약속에 의해 삭감함으로써 데이타 송수신 속도를 극대화 시키고, 동일한 화일이나 데이타를 두개의 64Kbps B채널에 걸쳐 보낼 수 있도록 한 ISDN BRI 고속 영상회의 단말장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems of the prior art, realizing a high data transmission and reception speed possible in the ISDN BRI transmission and reception bandwidth limit (128Kbps) and without interrupting the call for high-speed data transmission and reception during video conferencing It provides ISDN BRI high speed video conferencing terminal equipment that maximizes data transmission and reception speed by reducing bandwidth allocated to audio and video by appointment between users, and sends same file or data over two 64Kbps B channels. There is a purpose.
상기 목적을 달성하기 위한 본 발명은, 영상 입출력 및 암/복호화 수단에 연결된 FEC(Forward error correction)수단과, 상기 FEC수단에 연결된 다중화/역다중화수단과, 상기 다중화/역다중화수단에 연결된 오디오 암/복호화수단과, 상기 다중화/역다중화수단에 연결된 직렬 데이타 전송수단(SIO)과, 상기 직렬 데이타 전송수단(SIO)에 연결된 데이타 제어수단을 구비하는 ISDN(Integrated Services Digital Network) BRI(Basic Rate Interface) 영상회의 단말장치에 있어서, 고속데이타 제어신호에 따라 상기 다중화/역다중화수단에서 출력되는 영상제어신호를 FEC수단으로 출력하는 제1단속수단과, 상기 고속데이타 제어신호에 따라 상기 다중화/역다중화수단에서 출력되는 영상제어신호 또는 데이타제어신호를 직렬 데이타 전송수단(SIO)로 출력하는 제2단속수단을 구비하는 것을 특징으로 한다.The present invention for achieving the above object, the forward error correction (FEC) means connected to the video input / output and the encryption / decoding means, the multiplexing / demultiplexing means connected to the FEC means, and the audio arm connected to the multiplexing / demultiplexing means ISDN (Integrated Services Digital Network) BRI (Basic Rate Interface), which has a decoding / decoding means, a serial data transmission means (SIO) connected to the multiplexing / demultiplexing means, and a data control means connected to the serial data transmission means (SIO). In a video conference terminal apparatus, a first control means for outputting a video control signal output from the multiplexing / demultiplexing means to a FEC means according to a high speed data control signal, and the multiplexing / demultiplexing according to the high speed data control signal. And a second control means for outputting an image control signal or a data control signal output from the means to the serial data transmission means (SIO). It shall be.
이하, 첨부도면을 참조하여 본 발명의 일실시예를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;
제1도는 본 발명이 적용되는 ISDN BRI 영상회의 단말 구성도, 제2도는 본 발명에 따른 고속 영상회의 단말장치의 구성 블럭도이고, 제3도는 H.221 다중화 프레임 포맷도이다.FIG. 1 is a block diagram of an ISDN BRI videoconferencing terminal to which the present invention is applied, FIG. 2 is a block diagram of a high speed videoconferencing terminal apparatus according to the present invention, and FIG. 3 is a H.221 multiplexed frame format diagram.
제1도에서와 같이 영상회의 단말은 영상, 음성 그리고 데이타 처리부와 이를 다중화/역다중화하는 부분 그리고 ISDN과의 접속부로 구성된다. 이와 같은 구성평태에서 고속의 데이타 전송을 위해서는 제2도와 같이 영상 처리부에 할당하였던 대역 할당 신호를 데이타 송수신부에 할당하고, 사용자간 미디어에 따른 대역 할당 신호 절차인 H.242 종단간 시그널링(end-to-end signalling)을 거쳐 각 미디어를 위한 대역을 변경함으로써 전체 데이타 속도를 증가 시킬 수 있다.As shown in FIG. 1, the video conferencing terminal is composed of a video, voice and data processing unit, a multiplexing / demultiplexing unit, and a connection unit with ISDN. In this configuration state, for high speed data transmission, the band allocation signal allocated to the image processing unit is allocated to the data transmitting and receiving unit as shown in FIG. 2, and H.242 end-to-end signaling (end- Through to-end signaling, we can increase the overall data rate by changing the band for each media.
제3도의 H.221 다중화 프레임 구성 중 H.242 신호 절차인 FAS(Frame Alignm ent Signal)에 의한 채널 동기 후, BAS(Bit-Rate Allocation Signal)코드 교환에 의해 정해지는 대역폭의 할당은 음성 및 데이타의 전송 대역폭이 정해진 후 그 나머지가 영상 전송용으로 할당 되어진다. 따라서 BAS 코드에 의한 H.242 종단간 시그널링(end-to-end signalling)절차시 음성 및 데이타에 대한 대역을 할당 하지 않으면, BRI내의 2B 채널 B1, B2 채널이 동기되어 비트 통합(bit integration)이 보장되는 전송 대역을 할당 받을 수 있게하여, 128Kbps - (2FAS + 2BAS = 3.2Kbps) = 124.8Kbps (128Kbps - 3.2Kbps)고속 데이타 전송을 가능하게 한다.The allocation of bandwidth determined by bit-rate allocation signal (BAS) code exchange after channel synchronization by frame alignment signal (FAS), an H.242 signaling procedure, among the H.221 multiplexed frame configurations of FIG. After the transmission bandwidth is determined, the rest is allocated for video transmission. Therefore, when H.242 end-to-end signaling procedure is not allocated for the voice and data by BAS code, 2B channels B1 and B2 channels in BRI are synchronized and bit integration is performed. By allowing the allocation of guaranteed transmission bands, 128Kbps-(2FAS + 2BAS = 3.2Kbps) = 124.8Kbps (128Kbps-3.2Kbps) enables high-speed data transmission.
다음은 이 방식을 사용할 경우 할당 받을 수 있는 데이타 전송 대역폭을 나타낸다.The following shows the data transmission bandwidth that can be allocated when using this method.
상기 각 도면에 대해 상세히 설명하면 다음과 같다.Each of the drawings will be described in detail as follows.
제1도는 ISDN BRI 환경하에서의 영상회의 단말의 구성도로써 ISAC은 ISDN과의 접속을 담당하여 SCA신호는 128KHz의 주파수를 갖는 ISDN BRI 128Kbps 데이타 송수신을 보장하는 기준 신호이다. 이중 2B, 즉 각각의 B채널은 8KHz(duty cycle = 50%)의 주파수를 갖는 FSC 신호의 상태가 논리 '1', 논리 '0'으로 반전됨에 따라 분리되어진다.1 is a configuration diagram of a videoconferencing terminal in an ISDN BRI environment. The ISAC is in charge of connecting to ISDN, and the SCA signal is a reference signal that guarantees transmission and reception of ISDN BRI 128Kbps data having a frequency of 128KHz. Of these, 2B, i.e., each B channel is separated as the state of the FSC signal having a frequency of 8KHz (duty cycle = 50%) is inverted to logic '1' and logic '0'.
전체 사용가능한 전송 대역폭 128Kbps는 제3도의 다중화 프레임 구조에 있는 FAS 신호에 따라 채널간 frame alignment를 보장하고, H.242 절차에 의해 BAS 신호를 통해 종단간(end-to-end) 신호절차를 마친 후 초기(initial), 추가(additional) 채널의 동기가 보장된 상태에서 H.221 다중화/역다중화기의 제어신호 발생에 의해 제1도의 영상, 음성, 데이타 제어부에 전체 128Kbps 대역폭중 필요한 대역을 할당하여 준다. 대역할당 방식은 128Kbps중, 음성 및 데이타 제어부에 필요한 대역을 할당하고 나머지는 영상 송수신용으로 사용하도록 한다.128 Kbps total usable transmission bandwidth ensures inter-channel frame alignment according to the FAS signal in the multiplexed frame structure of FIG. 3 and completes the end-to-end signaling procedure via the BAS signal by the H.242 procedure. After the initial and additional channel synchronization is guaranteed, the required bandwidth is allocated among the entire 128Kbps bandwidth to the video, audio, and data controllers of FIG. 1 by generating control signals of the H.221 multiplexer / demultiplexer. give. The band allocation method allocates the necessary band to the voice and data control unit of 128 Kbps and uses the rest for video transmission / reception.
예로서 다중화기에서 음성에 48Kbps, 데이타에 14.4Kbps의 대역을 할당했다면 그 나머지(128Kbps - (48Kbps + 14.4Kbps + 3.2Kbps) = 62.4Kbps가 영상 송수신용 대역폭이 되는 것이다. 따라서, 이와같이 대역폭이 할당되었다면 영상 입출력 및 H.261 코덱부에서 발생된 H.261 코드는 FEC(Forwork error correction)부를 거쳐 62.4Kbps의 속도로 H.221 다중화/역다중화기에 입력되고, 48Kbps의 대역이 할당 되었던 오디오 코덱부의 코드 및 14.4Kbps의 대역폭을 할당받은 데이타 제어부의 데이타 직렬 입출력기(SIO)를 통해 2(BAS + FAS) = 3.2Kbps의 제어정보와 합쳐서 H.221 다중화/역다중화기로 보내져 다중화이고, 이 128Kbps로 다중화된 전체데이타는 IASC의 송신(TX)단과 접속 ISDN망으로 송신된다.For example, if the multiplexer allocates 48Kbps for voice and 14.4Kbps for data, the rest (128Kbps-(48Kbps + 14.4Kbps + 3.2Kbps) = 62.4Kbps becomes the bandwidth for video transmission and reception. H.261 code generated from video input / output and H.261 codec unit is input to H.221 multiplexer / demultiplexer at 62.4 Kbps through FEC (Forwork Error Correction) unit, and 48Kbps bandwidth is allocated. Code and 14.4Kbps bandwidth is allocated to the H.221 multiplexer / demultiplexer by combining with control information of 2 (BAS + FAS) = 3.2Kbps through the data serial input / output unit (SIO) of the data control unit. The multiplexed entire data is transmitted to the transmitting (TX) end of IASC and access ISDN network.
ISDN에서 수신되 ISAC의 수신(RX)단을 통해 H.221 다중화/역자둥화기와 접속되는 데이타의 흐름은 상기 설명하였던 기술의 역과 같으며, H.221의 역다중화를 거쳐 각각의 미디어 입출력부로 입력된다.The flow of data received from ISDN and connected to the H.221 multiplexer / decolumn through the RX terminal of ISAC is the same as that of the above-described technique, and through the demultiplexing of H.221 to each media input / output unit. Is entered.
제2도는 본 발명에 따른 고속 영상회의 단말장치의 구성 블록도로서, 상기 제1도 및 제3도 설명에서 기술하였듯이 전체사용 가능 대역폭 128Kbps중 영상코드 송수신을 위한 대역폭 할당은 오디오 및 데이타 전송 대역폭이 할당된 후 나머지 대역이 할당된다는 점에 착안, 영상 코드 송수신을 위해 할당하는 대역 할당 제어신호를 일시적으로 데이타 송수신용으로 할당함으로써 비트 통합(bit integration)이 보장된 최대 124.8Kbps의 대역폭을 데이타 송수신용으로 할당, 고속화일의 송수신이 가능하도록 하는 것이다.FIG. 2 is a block diagram of a high speed video conferencing terminal device according to the present invention. As described in FIG. 1 and FIG. 3, the bandwidth allocation for transmitting and receiving video code among the total available bandwidth of 128 Kbps is the bandwidth of audio and data transmission. Considering that the remaining bands are allocated after the allocation, the bandwidth allocation control signal allocated for transmitting and receiving image codes is temporarily allocated for data transmission and reception, so that a bandwidth of up to 124.8 Kbps for bit integration is guaranteed. This allows allocation and transmission of high speed files.
제2도의 고속데이타 제어신호가 논리 ‘1’인 경우 FEC부로 입력되는 영상제어 신호는 논리 ‘0’이 되어 실제 FEC단을 통해 입출력되는 영상 입출력 및 H.261 코덱부의 H.261 코드는 H.221 다중화/역다중화기와의 연결이 절체된다. 반면에 직렬 데이타 전송기(SIO)로 입력되던 저속의 데이타 제어신호는 고속데이타 제어신호의 상태가 논리 ‘1’임에 따라 절체되고 영상제어신호가 연결되게 된다. 이 경우 오디오와 데이타에 할당되었던 음성제어 및 데이타 제어신호를 H.242종단간(end-to-end) 신호절차에 의해 오프(off)시키면 데이타 제어부에 할당되는 전송대역은 전체 128Kbps중 2개의 BAS, FAS 신호를 제외한 124.8Kbps가 할당되게 된다. 이와같은 방법으로 고속의 화일전송을 마친 후 고속 데이타 제어 신호를 논리 ‘0’으로 놓으므로써 영상, 음성 데이타의 제어신호가 본래의 제어 신호 흐름 형태로 복원된다.If the fast data control signal of FIG. 2 is logic '1', the video control signal inputted to the FEC unit becomes logic '0', and the H.261 code of the video input / output and H.261 codec unit inputted through the FEC stage is H.261 code. 221 The connection to the multiplexer / demultiplexer is switched. On the other hand, the low speed data control signal input to the serial data transmitter (SIO) is switched as the state of the high speed data control signal is '1' and the image control signal is connected. In this case, if the voice control and data control signals allocated to audio and data are turned off by H.242 end-to-end signal procedure, the transmission bandwidth allocated to the data controller is 2 BASs out of 128Kbps. 124.8 Kbps is allocated except for the FAS signal. After the high-speed file transfer is completed in this manner, the control signals of video and audio data are restored to the original control signal flow by setting the high-speed data control signal to a logic '0'.
영상 회의 도중 CAD 정보와 같은 대량의 그래팩 데이타를 송수신하고자 할때 또는 영상 회의 단말을 통해 원격 의료 검진이 이루어지던 중 환자의 엑스레이(X-ray) 정보와 같은 많은 양의 데이타를 보내려 할때와 같이 국내 ISDN에 영상 회의 서어비스가 활성화 될때, 영상, 음성, 데이타의 다중 매체를 사용해 통신을 하던 사용자들은 회의 도중 통화를 끊지 않고 고슥으로 화일 및 데이타를 전송하는 경우가 발생할 수 있다.When sending and receiving large amounts of graphaek data such as CAD information during a video conference, or when sending a large amount of data such as patient X-ray information during a telemedicine examination through a video conference terminal. Likewise, when video conferencing service is activated in domestic ISDN, users who communicate using multiple media such as video, voice, and data may send files and data by air without interruption during the conference.
따라서 상기한 바와 같이 본 발명에 의하면 일시적으로 영상, 음성을 전체 혹은 보내고자 하는 데이타의 양에 따라 영상에 할당 되었던 대역만을 삭제함으로써 고속의 데이타 송수신이 가능하며, 데이타 송수신이 완료된 후 원래의 영상회의 상태로 복원이 가능한 상기와 같은 영상회의 단말에 대한 부가 기능은 사용자 측면에서 매우 유용한 서비스로 제공되어질 수 있는 효과가 있다.Therefore, as described above, according to the present invention, high-speed data transmission and reception is possible by temporarily deleting only the band allocated to the video according to the total amount of video or audio or the amount of data to be sent. The additional function of the video conferencing terminal, which can be restored to a state, can be provided as a very useful service from the user's point of view.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940035065A KR0137556B1 (en) | 1994-12-19 | 1994-12-19 | A terminal of high speed video conference through bri of isdn |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940035065A KR0137556B1 (en) | 1994-12-19 | 1994-12-19 | A terminal of high speed video conference through bri of isdn |
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| Publication Number | Publication Date |
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| KR960028513A KR960028513A (en) | 1996-07-22 |
| KR0137556B1 true KR0137556B1 (en) | 1998-05-15 |
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| KR1019940035065A Expired - Fee Related KR0137556B1 (en) | 1994-12-19 | 1994-12-19 | A terminal of high speed video conference through bri of isdn |
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