JPS58196752A - Picture exchange system - Google Patents

Abstract

PURPOSE:To install a picture exchange station independent of a telephone switching network and to realize economical picture service by making a connection between a center for picture exchange and a subscriber terminal by a call-back system from the center station. CONSTITUTION:The terminal station LS of the telephone switching network and terminal station LS-VID for picture exchange are equipped with telephone sets of subscribers SUBa-SUBn and picture terminals of VTR, etc., respectively. When the SUBa dials a special number on the telephone set for picture service, the center station TS-VID for picture exchange is acquired through a telephone circuit in a known method by the intervention of the terminal station LS and a repeater station TS. Then, when the SUBa dials its own telephone number and a menue number, the center station TS-VID connects the picture terminal of VTR, etc., of the SUBa equipped to this terminal station LS-VID through the terminal stations LS-VID and transmits a specific picture signal to this terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an 11ig II system configured such that when a subscriber requests a videotape to be recorded from a center station, the requested content is recorded from the center station to a video tape recorder in the subscriber's home. Regarding exchange method 2.

Conventional image switching systems have either housed image terminals in an existing telephone exchange or installed an image exchange that operates in conjunction with an existing telephone exchange.

However, these systems require modification of the existing telephone exchange to accommodate the terminals, and the modification is also complicated.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a simple and economical image exchange method.

In order to achieve the above object, the present invention installs a video tape center station connected to a telephone exchange, and the video exchange that houses the terminals operates under control from the center station without interlocking with the telephone exchange. It is composed of

Figure #11 is a relay system diagram showing an embodiment of the present invention, where 8UBa and 8UBn are subscribers, VTR is a video tape recorder, LS is a terminal station of the telephone switching network, TS is a central station of the telephone switching network, TS-VID is a center station for image exchange, L
S-VID is a terminal station for image exchange.

An embodiment of the present invention will be described below with reference to FIG.

When subscriber 80Ba requests the center station T8-VID to record a videotape, he lifts the handset and dials a special number (for example, 3 digits "IXY", etc.), and as is known, the call is sent from the terminal station L8 to the central station T8. Special number IXY is transferred and central station T
S identifies that the call is to the center station from the special number IXY and connects it.

When the second beep is sent out from the center station TS-VID,
Subscriber 5UBa dials his own telephone number 4 (hereinafter referred to as ID number) and menu number 1.

The dial signal is transmitted from the telephone of subscriber 5UBa to the center station by a push button signal (hereinafter referred to as PB signal).
Transferred from d to End.

The safety station TS-VID activates the terminal station LS-VID4, connects it to the video tape recorder VTR of subscriber 5UBa corresponding to the ID number, and transfers the contents of the video tape specified by the menu number 1 to the video tape recorder VTR. Send and record. Furthermore, the Sefta station TS-IVD performs billing processing (creation of a bill) for 5 UBa using the ID number. .

Next, a detailed explanation will be given with reference to the configuration diagram in FIG.

FIG. 2 is a configuration diagram showing the main parts of an embodiment of the present invention, in which a tape recorder, C a signal converter, and LS-VID I! jgI
Replacement terminal station, C0NT is the control device, NW is the network)'7
-Ri, TAG! Send'tM tWI m = ,
TS-VID is a center station for image exchange, ICT
is a λ trunk, PBORT is a PB origination register trunk, and TKE is a guidance talkie device.

When the λ trunk ICT of the center station TS-VID is activated by the central station TS of the switching network, the control device C0NT connects the λ trunk ICT and the PB transmission register trunk PBORT via the network NW. The second dial tone is transmitted from the PB transmission register trunk P130RT, and ID-1i number and menu number 1 are received as dial signals from subscriber 8UBa.

As a result, the control device C0NT identifies whether the trunk line to the terminal station L8-VID where the subscriber 5UBa is accommodated is vacant or blocked, and if it is vacant, the control device C0NT of the terminal station LS-VID
It transfers the ID number to 0NT and instructs it to connect the transmission amplifier TA corresponding to subscriber 5UBa to the trunk line.

In addition, the control device C0NT of the center station TS-VID connects the video tape recorder VTR corresponding to the first menu number to the transmission amplifier TA for the trunk line to the terminal station LS-VID via the signal converter C, and starts transmission. do. In addition, center station T
The control device C0NT of the S-VID connects the λ trunk ICT and the guidance talkie device TKE, and instructs the subscriber 5UBa to start recording.
puts down the handset and the line of the telephone exchange network is released.

When the image exchange network finishes recording to the terminal, the center station T8-
It is opened by the instruction of the VID control device C0NT, and subscriber 5
The billing process is performed for UBaK.

Furthermore, after receiving the dial signal from subscriber 5UBa at center station T8-VID, if all trunk lines to terminal station LS-VID are busy, a message is sent from guidance talkie device TKE and the call is repeated later. Have them apply.

Furthermore, according to the present invention, although not shown, it is possible to simultaneously monitor the same content on a television station while recording on a video tape recorder in the subscriber's home.

As described above, according to the present invention, the center and subscriber terminals are connected by the so-called call-back method from the center station for image exchange, and the terminal station for image exchange is independent of the existing telephone exchange network. It can be installed easily, eliminates the need to modify existing telephone exchanges, and realizes a simple and economical image service.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a relay system according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a main part of an embodiment of the present invention. 5UBa, 8UBn...Subscriber, VTR...Video tape recorder, LS...Telephone switching network terminal station, TS...
...Telephone switching network central office, TS-VID...center office, LS-VID...terminal office, ICT...λ trunk,
NW...Network, PBOR8...FB calling register trunk, TKB...Guidance talkie device, C0N
T...control device, TA...transmission amplifier, C...signal converter.

Claims (1)

[Claims] 1 A center station for image exchange connected to the telephone switching network and a terminal station for image exchange connected to the center station and separated from the telephone switching network are provided, and control information such as image service request information is transmitted to the telephone. An image exchange method characterized in that the image signal is sent to the center station via an exchange network, and the image signal is received from the center station via a terminal station for image exchange.