JPS6119194B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image signal communication system such as facsimile communication.

Facsimile communication employs a system in which a storage exchanger is installed in a switching network to store image signals in order to compensate for speed differences in facsimile communication terminal equipment and to enable broadcast communication. If we focus on the receiver as a form of use of facsimile, there are two possible ways to use the facsimile: the receiver receives the image signal according to his own request, and the receiver receives the image signal unilaterally. Image signals that are unilaterally transmitted include those that are necessary, such as between a head office and a branch office, and those that are not necessarily necessary, such as advertisements. The latter has drawbacks such as having a large number of image signals that are not necessarily necessary, increasing the frequency of paper use, and making it difficult to search for necessary image signals.

An object of the present invention is to provide a means for accumulating received image signals according to a subscriber's request, allowing the subscriber to index them, and extracting only the necessary image signals, thereby solving the above-mentioned drawbacks and further preventing mischief. An object of the present invention is to provide an image signal selection method.

According to the present invention, in response to a request from a subscriber, received image signals to the subscriber within a certain period of time are stored in a storage exchanger, and in response to an index request for the received image signals from the subscriber, the received image signals are transmitted. A picture signal selection method is obtained that transmits original information (for example, a telephone number) and allows the subscriber to select the desired received picture signal.

The image signal selection method of the present invention is image signal communication in which image signals sent from a first subscriber terminal to a second subscriber terminal are stored in a storage/exchange device and then transmitted to the second subscriber terminal. In the system, there is provided an image signal accumulating means for accumulating received image signals to the second subscriber terminal within a certain period of time in response to a first request signal from the second subscriber terminal; storage means for storing at least one starting storage address and final storage address of a signal for each of the second subscriber terminals together with source information for identifying the first subscriber terminal; means for transmitting the source information stored in the storage means to the second subscriber terminal in response to a second request signal from the terminal; and means for transmitting the source information stored in the storage means to the second subscriber terminal based on the source information. receiving means for receiving a selection signal of a desired signal in the storage means; and a first storage address and a last storage address corresponding to the image signal desired to be received from the storage means based on the selection signal received by the reception means. and means for reading and transmitting image signals in the storage means specified by these addresses to the second subscriber terminal.

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a relay system diagram showing an embodiment of a public facsimile communication system to which the present invention is applied. SubA is the sending subscriber, SubB is the receiving subscriber, F
is a facsimile terminal, C is a telephone and F switching device,
LS is the subscriber exchange, OGT is the outgoing trunk, ICT is the incoming trunk, TS is the toll exchange, TP is the signal tone trunk and PB receiver, CPU is the central control unit, CSE is the common line signaling device, I is the image signal storage O is an input line section, O is an image signal storage output line section, M is a storage address, STOC is a storage exchanger, S is an image signal storage section, and T is an image signal transfer section.

In conventional facsimile communication, when sending an image signal from SubA to SubB, which has F with a different communication speed, a special number (for example, 162) is dialed, and when the LS station receives this special number, the connection is extended to the TS station handling fax. Go. At that time, to the TS station
SubA's phone number is also sent. SubA is the TS station
When the second dial tone is confirmed from the TP, the SubB telephone number is sent directly to the TS station using a PB signal.
When the TS station receives SubB's phone number via TP,
SubA and SubB from CPU to STOC via CSE
Along with sending out the phone number of F and the type information of F.
Activate C of SubA, switch to F, store the image signal from SubA in S of STOC via FC-LS-OGT-ICT-TS-I, and disconnect SubA.
Next, STOC is sent from the CPU to the TS station via CSE.
Send SubB's phone number, connect with SubB, and STOC's S-O-TS-OGT-ICT-LS-C
The image signal received from SubA is sent to F of SubB via
Send at a speed that matches SubB's F. In this way, since the image signal is unilaterally sent from the sender to the receiver via STOC, the receiver has no right to select the image signal.

In the present invention, in order to give the receiver the right to select the image signal, a memory corresponding to the subscriber is prepared in the M of the STOC for the subscriber who wants to have the right to select the image signal, and as shown in FIG. , the source information for the image signals transmitted within the time designated by the subscriber and the start and end addresses of the image signals stored in S are recorded.

After that, from the subscriber (for example, SubBb in Figure 1),
When an index request for a received image signal is sent via a special number to the TS, the TS transmits the TS CPU−CSE−STOC CSE.
- Notify STOC via the CPU that an index request has been received from SubB, and operate C of SubB to switch the telephone to the F side. STOC reads the source information from the SubB compatible memory in M, converts the source information into an image signal in S, and converts the source information into an image signal.
Send source information via OGT-LS-C-F.

SubB determines the necessary image signal from the sending source information, and
When returned to the phone side, STOC detects that F of SubB has returned to the phone, and STOC O-CPU-CSE
-TS Makes the TS send a request image signal reminder sound to SubB from the TP via the CSE-CPU. When SubB hears this sound, it changes the number (index order) of the requested image signal as #2#5* (requires the 2nd and 5th).
Send to TS with PB signal. In TS, when PB signal is received by TP, TS CPU−CSE−STOC CSE−CPU
Notify the SubB request image signal via the SubB
Activate C and switch to F side. On the other hand, STOC reads out the first and last addresses stored in S of the second and fifth image signals from the memory corresponding to SubB in M, S-O-TS-ICT-OGT-LS-C-
Send the request image signal to SubB via F.

As explained above, the present invention stores received image signals within a certain period of time together with source information in a storage/switching device at the subscriber's request, and allows the subscriber to index the source information. It is possible to select a received image signal.

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram showing an example of a public facsimile communication system to which the present invention is applied, and FIG. 2 is a diagram showing contents written in a subscriber correspondence memory in a storage/switching machine according to the present invention. SubA...Sending subscriber, SubB...Receiving subscriber,
F...Facsimile terminal, C...Switching device, LS
...Subscriber exchange, OGT ...Outgoing trunk, ICT
...Incoming trunk, TS...Toll exchange, TP...Signal tone trunk and PB receiver, CPU...Central control unit, CSE...Common line signaling device, I...Picture signal storage incoming line section, O... ...Picture signal storage output line section, STOC
...Storage exchanger, S...Picture signal storage section, T...Picture signal transfer section, M...Storage device.

Claims (1)

[Scope of Claims] 1. An image signal communication system in which an image signal sent from a first subscriber terminal to a second subscriber terminal is stored in a storage/exchange device and transmitted to the second subscriber terminal. an image signal accumulation means for accumulating image signals received by the second subscriber terminal within a certain period of time in response to a first request signal from the second subscriber terminal; and an image signal accumulated in the accumulation means. storage means for storing at least one first memory address and last memory address for each of the second subscriber terminals along with source information for identifying the first subscriber terminal; means for transmitting the transmission source information stored in the storage means to the second subscriber terminal in response to a second request signal from the storage means; receiving means for receiving a selection signal of the image signal of the storage means; and reading a first memory address and a last memory address corresponding to the image signal desired to be received from the storage means based on the selection signal received by the reception means. An image signal selection system comprising: means for transmitting image signals in the storage means specified by these addresses to the second subscriber terminal.