JPS62159562A - Exchange connection system - Google Patents

Abstract

PURPOSE:To attain the efficiency in common use of a transmission line for a broad band digital signal and other digital signals by dividing the broad band digital signal into plural signals, sending them and reconstituting them into the original digital signal at the reception side. CONSTITUTION:A division control section 23 divides a broad band digital signal outputted from a main body 27 of an animation transmission equipment and to be sent in, e.g., 384kbps into a proper constant bit number and distributes the result to each individual transmission section 24 sequentially. Each individual transmission section 24 adds a prescribed header and address to a distributed signal bit as required and sends the result to an exchange 2. The signal is received by an individual reception section 26 of an opposite animation transmission equipment 20 via an exchange 2, a multiplexer 7 and a high-speed digital line 8. A assembly control section 25 combines the signal received by the individual reception section 26 in the order of addresses and gives the result to the main body 27.

Description

[Detailed Description of the Invention] [Summary] An exchange connection method for transmitting and receiving video information, etc. of a video conference. The wideband digital signal is divided into multiple signals in the band of the digital voice signal, and if necessary, addresses are attached and transmitted individually over multiple lines of the digital voice exchange. The receiving side is
Receives the split signals individually and reconstructs them into original digital signals. As described above, the efficiency of sharing a transmission path between a wideband digital signal and other digital signals can be easily realized using an ordinary exchange.

[Industrial application field]

The present invention relates to a switching connection system for transmitting and receiving broadband digital signals such as video information of television programs.

Called a video conference system, etc., a system is used that mutually transmits conference participants from two locations, images such as explanatory diagrams, and participants' comments as digital signals in order to hold a conference between remote locations. ing.

In such a system, in order to transmit so-called moving images in real time, a relatively wide band digital signal transmission is required, at least 384 Kbps (kilobipis).
seconds), and to improve the image quality, a wideband signal several times that number is used.

[Prior Art] FIG. 2 is a block diagram showing an example of a configuration of a broadband communication system.

In the figure, 1 is a terminal device, 2 is a digital voice exchange,
3 is a telephone a (or terminal device) connected to the subscriber line of digital voice exchange (hereinafter simply referred to as an exchange) 2; 4 is a video transmission device that transmits and receives video conference images; and 5 is a video transmission device that captures video conference images. A camera 6 inputs a video signal to the moving image transmitting device 4, and a monitor 6 serves as a monitor on which the moving image transmitting device 4 receives the output of the signal received from the partner device and displays an image.

7 is a multiplexing device that connects the terminal device 1, the exchange 2, the video transmission device 4, etc., time-division multiplexes the signals of the bands assigned to each, and sends the signals to the high-speed digital line 8.
Further, the time division multiplexed signal received from the high-speed digital line 8 is distributed to the terminal device 1, the exchange 811t2, the video transmission device 4, etc.

In this case, each terminal device 1 is assigned, for example, 4800 bps, and the exchange 2 is assigned 64 Kbps per voice line, as is well known.
Since ps is used, 64Kb is required for each line of trunk line 9.
Assign ps.

In addition, the video transmission device 4 has, for example, 384K as described above.
bps, 768Kbps or 1,5Mbps
(megabits/second), and the multiplexer 7 time-division multiplexes them into a signal of, for example, 6.3 Mbps on a high-speed digital line 8.

[Problem that the invention seeks to solve]

In this way, the terminal device 1 connected to the multiplexer 7,
Exchange A2, video transmission device 4, etc. are high-speed digital circuits yA8
It is possible to use the transmission function between the devices connected to the multiplexing device 10 at the opposite location as if they had a direct transmission line corresponding to the allocated band.

However, on the other hand, of the transmission capacity of the high-speed digital line 8, the capacity of, for example, 384 Kbps allocated to the video transmission device 4 is occupied by the video transmission device 4 even when the video transmission device 4 is not in operation. Therefore, if the usage rate of video transmission equipment is relatively low, high-speed digital line 8
There is a problem in that the usage efficiency of the system is significantly reduced.

[Means for solving problems]

FIG. 1 is a block diagram showing the configuration of the present invention.

The figure shows the configuration of a broadband communication system, where 20 is a video transmission device, and 21 is a distribution/assembly unit 27 of the video transmission device 20.

In the distribution/assembly section 21, 22 is a connection control section, 23 is a distribution control section, 24 is an individual transmission section, 25 is an assembly control section, and 26 is an individual reception section.

[For production]

The video transmission device 20 includes an individual transmitter 24 and an individual receiver 2.
6 is connected to the exchange 2.

The individual transmitting section 24 and the individual receiving section 26 form a pair, and the logarithm thereof corresponds to the transmission band of one line of exchange a2, for example, 64 Kbps.
, as a unit, which is a multiple that satisfies the bandwidth of the transmission signal, and for example, six pairs are provided using 384/64.6.

When using the video transmission device 20, for example, the connection control unit 22 of the distribution/assembly unit 21 is activated by a power-on signal, and each individual transmitter 24 is placed in a transmitting state for the exchange n2, and each individual transmitter A dial signal with a predetermined dial number is sent out every 24 seconds.

This dial number is a calling number for connecting to each individual receiving unit 26 of the moving image transmission device 20 serving as the other party via exchange a2 and, if necessary, a similar exchange on the other party.

When the individual receiving unit 26 of the video transmission device 20 on the other party receives the calling signal from the exchange 2, it configures a response state using a predetermined telephone interface, and in this way, the individual transmitting unit 24 on the calling side and the called party communicate with each other. Connections are made between the individual receiving section 26 on the calling side and the individual receiving section 24 on the calling side and the individual transmitting section 26 on the called side.

The distribution control unit 23 divides the wideband digital signal outputted from the main unit 27 of the video transmission device and to be transmitted at, for example, 384 KbρS into an appropriate fixed number of bits and sequentially distributes the divided bits to each individual transmission unit 24.

Each individual transmitter 24 attaches a predetermined header and address to the distributed signal bits, if necessary, and sends them to the exchange@2, so those signals are transmitted to the exchange 2, multiplexer 7,
It is received by the individual receiving unit 26 of the other party's video transmission device 20 via the high-speed digital line 8 .

The assembly control section 25 combines the signals received by the individual reception section 26 in the order of each address, and passes the combined signals to the main body section 27 .

As described above, transmission equivalent to, for example, 384 Kbps is performed using a plurality of 64 Kbps bands via the exchange in parallel, so the video transmission device 20 can send and receive signals at the conventional speed, and the video transmission device 20 can If not in use, those t34Kbps bands can be effectively used for other telephone calls, etc.

〔Example〕

In FIG. 1, a main body section 27 of a video transmission device 200 has the same functions as the conventional video transmission device.

Further, other parts having the same reference numerals as those in FIG. 2 are also as described above.

The video transmission device 20 is connected to a plurality of subscriber lines of the exchange 2 by an individual transmitter 24 and an individual receiver 26.

Each individual transmitting section 24 and individual receiving section 26 constitute a transmitting/receiving signal interface as a pair. The logarithm is determined as follows.

That is, since one line of the exchange 2 has a 64 Kbps band as described above, if the signal output from the main unit 27 of the video transmission device 20 is, for example, a 384 Kbps wideband digital signal, the 38/I/64 6, the number of pairs of the individual transmitter 24 and the individual receiver 26 becomes six, which are connected to the six joining lines of the exchange 2.

When using the video transmission device 20, for example, the connection control section 22 of the distribution/assembly section 21 is activated by a power-on signal, and each individual transmitting section 24 is placed in a transmitting state to the exchange 2, and each individual transmitting section A dial signal with a predetermined dial number is sent out every 24 seconds.

This dial number is a calling number for connecting to each individual receiving unit 26 of the video transmission device 20 that is the other party via the exchange@2 and, if necessary, the exchange 2 of the other party. A number may be determined so that the receiver can be connected to a specific individual receiving section 26, or a representative number may be set so that it is only necessary to connect to an arbitrary one.

Further, different groups of call numbers may be provided so that a plurality of partner video transmission devices can be selected, and in this case, the designation of the partner device can be inputted from the outside when the connection control section 22 is activated.

Similar to the conventional video transmission device 2, the main body section 27 processes the signal input from the camera 5 and generates a transmission signal, and the distribution control section 23 divides it into an appropriate constant number of bins and sends it to each individual transmission section. 24 in order.

Each individual transmitter 24 attaches a predetermined header and address, if necessary, to the distributed signal bits and sends them to the exchange 2. The address is, for example, a unique value for each individual transmitter 24, and is made to indicate the order of distribution.

Each signal sent to exchange 2 at 64 Kbps is sent to exchange a
2. The signal is received by the individual receiving unit 26 of the other party's single-picture transmission device 20 via the multiplexing device 7, high-speed digital line 8, etc.

The assembly control unit 25 on the reception side combines the signals received by the individual reception unit 26 in a predetermined order or in an order according to the address,
The header, address, etc. are removed and the received signal is passed to the main unit 27, and the main unit 27 processes the received signal and outputs it to the monitor 6 in the same manner as the conventional video transmission device Z.

As described above, when the video transmission device 20 is not used, the video transmission device 2
The band occupied by 0 is eliminated, and the band of, for example, 384 Kbps, which was conventionally always occupied, can be effectively used for other telephone calls and the like.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the band of the high-speed digital line of the communication system that transmits broadband video information etc. can be effectively utilized, thereby improving the economic efficiency of the communication system. This has a significant industrial effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of an example of a conventional configuration. In the figure, 1 is a terminal device, 2 is a switch, 3 is a telephone, 4.20 is a video transmission device, 5 is a camera, 6 is a monitor, 7.10 is a multiplexing device, 8 is a high-speed digital line, and 21 is a distribution/distribution device. assembly department,
22 is a connection control section, 23 is a distribution control section, 24
25 is an assembly control section, 26 is an individual reception section, and 27 is a main body.

Claims (3)

[Claims] (1) In a wideband digital signal transmitting/receiving device, means (23, 24) for dividing the wideband digital signal to generate a plurality of relatively narrowband divided signals, and individually transmitting each divided signal via an exchange. means (24) for transmitting each divided signal to the exchange; and means (26) for individually receiving each divided signal from the exchange.
), and means (25) for combining a plurality of the received divided signals to reconstruct the broadband digital signal. (2) The switching connection system according to claim 1, wherein the broadband digital signal is a moving image information signal. (3) The switching connection system according to claim 1 or 2, wherein each of the divided signals is a digital signal occupying a band equal to or lower than a digital voice signal, and the exchange is a digital voice exchange.