JPS6226944A - Line control system - Google Patents

Abstract

PURPOSE:To attain connection/disconnection of a high speed digital picture signal in the unit of a picture signal at the drop, insertion and through modes in an optional direction by providing a transmission line multiplex converter, a terminal multiplex converter, a matrix switch device and a control signal generator with the command from a controller. CONSTITUTION:A demodulation input signal 23 to a terminal multiplex converter 4 at a B station 101 is demodulated by a demodulation section 16, the demodulated base band picture signal 32 is inputted to a monitor 6 and monitored. On the other hand, an incoming modulation signal 25 from a matrix switch 5 is inputted to the 1st multiplex converter 2, multiplexed by a modulation section 11, outputted to a transmission line 1 as an incoming output signal 26 and transferred to a C station 102. Further, an outgoing modulation signal 29 from the matrix switch device 5 is inputted to a modulation section 14 of the 2nd multiplex converter 13, where the signal is multiplexed and outputted to the transmission line 1 as an outgoing signal 30 and transferred to an A station 100. The connection/disconnection is controlled by inputting a control signal 70 to the matrix switch device 5 from a controller 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line control system for controlling connection and disconnection of lines on the video signal all-high-speed digital signal decoding side in a one-way video transmission service.

[Conventional technology]

Conventionally, in a one-way video transmission service, the connection of the valley video signal has been disconnected at the baseband signal portion of the terminal side.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, the image of the relay transmission line is 111! In a system where line capacity is limited, monitoring points are distributed at IJI locations, and each location has multiple monitor cameras and monitor terminals, and video information from any monitor camera at any location. Video 1# on any device anywhere! When monitoring signals between any two points, there is a switch to connect and disconnect the line in the baseband signal band of each monitor terminal and monitor camera, and a switch in the digitized high-speed digital signal band. A switch for disconnecting the transmission line is required, which has the disadvantage of complicating the system configuration.

[Failure to solve the problem]

In order to solve the above problems, the present invention modulates the baseband video signal of a monitor camera at any location into a digital signal, and also modulates the video signal for the monitor terminal before demodulating and converting it into a baseband video signal. By disconnecting the digital signal at the point of the digital signal, it can be treated as the same signal as the modulation section and demodulation section of the converter on the relay transmission line, and the drop from the relay transmission line to the converter To provide a line control system that allows selection of either an input to a relay transmission line via a conversion stage or a through mode in which a baseband signal is output to the relay transmission line without a modulation/demodulation stage. In other words, in the circuit and line control system of the present invention, when unidirectional image transmission is performed between any two points via all the relay transmission lines, the uplink and T-way relay transmission lines and -Fa and downlink transmission line signals are used. a multiplex conversion device that modulates and demodulates a baseband signal into a high-speed digital image signal, an image signal conversion device that modulates and demodulates a baseband signal into a high-speed digital image signal, a matrix switch device that switches the high-speed digital image signal, and a matrix switch device that controls switching. The high-speed digital image signal can be connected and disconnected in units of image signals in drop, in-surge, and through valley modes in any direction based on commands from the control device.

〔Example〕

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

FIG. 1 is a system configuration diagram showing an embodiment of the present invention. In the figure, A station 100 . B.M.
IOI%C station 102 is connected, and the direction from A station 100 to 0 station 102 is an uplink transmission path, and 0 station 102
The direction from the station A to the station A 100 is the downlink transmission path. 8 stations 1
01 is composed of a first multiple converter 2, a second multiple converter 3, a terminal multiple converter 4, a matrix switch device 5, a monitor device if6, and a monitor camera 7. First, the upstream output signal 6 which is the output of A/1ij100
0 is input to the second multiplex converter 3 as the uplink input signal 21 of the eight stations 101 via the relay transmission path 1, and
3, the signal is demodulated into an upstream digital image demodulated signal and inputted to the matrix switch device 5. The baseband image output signal 31 output from the monitor camera 7 is input to the terminal multiplex conversion device 4, modulated by the modulation section 15, and input to the matrix switch device [5] as a digital image modulation input signal 24. On the other hand, the downlink output signal 80 that is the output of the CwJIO2 is inputted to the first multiplexing device 2 as the downlink input signal 27 of the 8 stations 101 via the relay transmission line t't-, and the demodulation unit 12 outputs the downlink digital image. Demodulated signal 2
8 is input to the matrix switch 5--te device 5.

In this way, the upstream digital image demodulated signal 22, the digital image modulated input signal 24, and the downstream digital image demodulated signal 28
The three types of image signals are input to the matrix switch device 5, where they are distributed to their respective intended destinations. That is, when the upstream digital image 1-band demodulated signal 22 is dropped to 8 stations 101 as the demodulated input signal 23, when it is transferred to 0 stations 1 (12) as the upstream modulated signal 25,
Further, three types of operations are possible when transferring the signal to the A station 100 as the downlink modulated signal 29. Similarly to the upstream digital image signal 22, the digital image modulation input signal 24 and the downstream digimole image'QI tone signal 28 are optionally outputted from the matrix switch device 5 as image signals in three directions. Further, the demodulated input signal 23 to the terminal multiplex conversion device 4 in B@101 is demodulated by the demodulation unit 16 of the terminal multiplex conversion device 4, and the demodulated baseband image input signal 32 is inputted to the monitor device 6 and is monitored. be done. On the other hand, the uplink modulation signal 25 from the matrix switch device 5 is
J'' is input to the multiplex converter 2 and multiplexed by the modulator 11.
After that, it is outputted to the transmission line 1 as a ``Yuri output signal 26'' and transferred to the CMj 102. Further, the F modulation signal 29 from the matrix switch device f5 is inputted to the modulation section 14 of the second multi-vehicle changing device 3, multi-salted, and outputted to the transmission line l as a tri-output signal; A station 10
Transferred to 0. In addition, 181 of these connection disconnections yi
1 side 1 is performed by inputting a control signal 70 from the control device 8 to the matrix switch device 5.

〔Effect of the invention〕

As explained above, in the line control system of the present invention, when a relay transmission line is used for video transmission service, the high-speed digital section Since the line can be connected and disconnected, control becomes easier, and the system becomes simpler and more flexible.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing a system configuration according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Relay transmission line, 2... First multiplex conversion device, 3... Second multiplex conversion device, 4...
... Multiplex conversion device for terminal, 5 ... Matrix switch device, 6 ... Mo J' device, 7 ...
...Monitor camera, 8...--Control! Place, 11.
...first modulation section, 12...first demodulation section,
13... Second demodulation unit, 14... Second modulation unit, 15... Terminal modulation unit, 16...
Terminal demodulation unit, ioo...A station, 101...
...B station, 102...0 station. /Nearney:;N17, L+ ・Representative Patent Attorney Susumu Uchihara71),')(31
,)−1,′

Claims (1)

[Claims] In transmitting an image signal output from a monitor camera of one station to a terminal device of another station via a relay transmission line, the relay transmission line is composed of a transmission line connecting each of the stations, and each station has a a multiplex conversion device for a transmission line, including a demodulator that demodulates multiple transmission line signals inputted from the transmission line into a high-speed digital image signal; and a modulation unit that converts the multiplexed transmission line signal inputted from the transmission line into a multiplexed transmission line signal output to the transmission line; , comprising a modulation section that converts the baseband image signal of the monitor camera into a multiplexed high-speed digital image signal, and a demodulation section that receives the high-speed digital image signal as input and outputs the baseband image signal to the monitor terminal device. A terminal multiplexing device; a matrix switching device that takes the output of the transmission line and terminal multiplexing device as an input and arbitrarily distributes this input to the input of the transmission line and terminal converting device; and this matrix switching device. 1. A line control system comprising: a control signal generator that adds a control signal for controlling the line control system.