DE3139343A1 - Non-line-conducted data transmission method - Google Patents

Abstract

During periods of non-transmission of a television programme, data are transmitted in system-compatible representation via a television transmitter (TVZ) to the television subscribers (Tln), thus opening up additional data transmission capacity. The data may be transmitted in addressed or encrypted form. Interactive communication between the television transmitter (TVZ) and television subscribers (Tln) is also possible, where the television subscribers (Tln) in turn transmit data via the telephone network or via a wireless route to the television transmitter (TVZ), which forwards these data if necessary to other subscribers (Tln). <IMAGE>

Description

Non-wired g

Data transfer procedure

The invention relates to a non-wired transmission method for the transmission of data via a central television transmitter and possibly with this connected decentralized television channels on the one hand to television participants on the other hand.

In many cases, data is already in the For the viewer invisible blank lines of the BildaustastlUcke the television signal transmitted and displayed in the form of text panels on the screen.

This is called "teletext" in the Federal Republic of Germany Method uses this free television transmission capacity during broadcasting Transmission of information from around 60 text panels with a cycle time of 12 Seconds. The amount of information that can be transferred is therefore very limited, which is already a certain restriction of the offer to those of general interest Information conditional and in any case the transmission of for individual recipients excludes certain information from the outset.

The invention is now based on the object of finding a way to a more far-reaching one To show the development of transmission capacities of television stations and thereby to enable the transmission of much larger amounts of data.

Based on a non-wired data transmission method for the transmission of data via a central television station and, if necessary with this connected decentralized TV channels on the one hand Television participants on the other hand, this object is achieved according to the invention by that such data in television system-compliant representation in times of non-emission of a television program can be transmitted via the television station concerned.

The invention offers the advantage that data transmission is carried out on the transmission side existing technical facilities can be used and that appropriate additional facilities are only to be provided there on the receiving side, where the recipient in question actually wants to participate in the data transmission service. In this case, such a data transmission can in particular also in such areas of Be an advantage in which other transmission media such as wired data transmission paths are not sufficiently available.

The invention also has the advantage of providing a much larger transmission capacity for the additional data transmission over a television station with you, which also opens up the possibility of to specifically transmit recipient-specific data, with in a further embodiment of the invention, the data is transmitted to one or more participants in an addressed manner will.

The data can advantageously also be transmitted in encrypted form will.

Further advantageous refinements of the invention are through dialog traffic between television broadcasters and participants or through dialogue between the participants marked among each other via the interconnection of the television broadcasting network. the Connection between subscribers and the television broadcasting network can be in dialog traffic in a further advantageous embodiment of the invention over the telephone network or wirelessly. Advantageously, a A plurality of data channels can be bundled in frequency division multiplex or in time division multiplex. Finally, the data transmitted to a subscriber can advantageously can also be recorded by a data storage device on the receiver side.

The invention is now based on an exemplary embodiment with reference explained in more detail on the drawing.

The drawing shows schematically in one for understanding the invention required scope an exemplary embodiment for the basic structure of a data transmission system according to the invention. In the left part of the drawing are the central facilities TVZ, in the right part the participant facilities of the data transmission system. The TVZ facilities include a central Television transmitter 1 and a data processing system 2 connected to it, as well as modems 3, recipient 4, a database 5 and peripheral input devices 6. The subscriber Tln has a television receiver 7, which in the exemplary embodiment has a demultiplexer 8 is equipped. The devices on the subscriber side also include a memory 9, a printer 10, a keyboard 11, a switching device 12, a telephone set 15 in connection with a modem 13, as well as a transmitter 14.

The central television transmitter 1 is optionally with one or more decentralized television stations connected to a television network in which during the regular television programs are broadcast during the regular program times. Outside of the regular program times, the television station Ilnun broadcasts data in television system-compliant display. This data can be obtained from various sources come, from peripheral input devices 6, from the Database 5 or also from the modems 3 transmitted by the subscribers over the telephone network Information demodulate, or from the receivers 4, which are based on the subscribers receive information transmitted wirelessly. The data processing system 2 evaluates, if necessary, those arriving from the participants in the central TVZ Information and the data that are generated in the input devices 6 from and feeds data into the database 5, retrieves data therefrom and carries out the data to be transmitted Data to the television broadcasting network, which it broadcasts in a television system-compliant representation.

The data transmitted by the central facility TVZ are stored in the subscriber receiving devices 7 received and can be shown on the screen will. A plurality of data channels can be frequency division multiplexed in a television channel or bundled in time division multiplex, with one and the same subscriber if necessary a corresponding plurality of data from different data channels can be received. The data can initially be stored in memory 9. As a memory 9 can for example video recorders, cassette recorders and semiconductor memories are used will.

The received data can also be printed out by the printer 10 are or drive a fax machine, not shown in the drawing, the converts the data into faxes. The participants, for their part, can use the data generate the keyboard 11, which in turn on the screen of the receiving device 7 can be displayed and printed out by printer 10. The participant-side Data can be sent over the telephone network or wirelessly from the central facility TVZ are transmitted. For this purpose, the participants have a telephone device 15 and a modem 13 connected to it or via a transmitter 14. Modem 13 converts the subscriber-side data into a telephone-compliant one Form of representation so that it can be sent via the telephone network to the modem at the transmitter end 3 can get; alternatively, the transmitter 14 can send the subscriber-side data radiate so that they can be received by the television transmitter-side receiver 4. The switching device 12 allows the participants, if necessary, the choice of the data via the telephone network or wirelessly to the central facility TVZ transmit where the data then - as already mentioned - from the data processing system 2 are evaluated. In time division multiplexing, the data can be transmitted from the Participant facilities to the central facility TVZ according to DE-AS 29 32 735. For this purpose, in a subscriber device the to the central Setup TVZ characters to be transmitted initially cached. Bump into it these symbols on all participant facilities involved in this operation and the central facility TVZ a transmission cycle in which said Signs and, if necessary, at other participant facilities in good time appearing characters in the subscriber facilities assigned time slots of the Transmission cycle transmitted via a multiplex link to the central facility TVZ will.

The participants can so the central facility TVZ information with regard to the data to be retrieved from the database 5 and the addressii) of the or of the participants for whom the data is intended. In addition, can the return channel is used by the participants to transmit data that be entered into the database 5 of the television network or for forwarding are intended for one or more addressed participants. If that way If two participants transmit information that is specific to one another, they can use Interconnection of the television broadcasting network also handle dialogue traffic, with in each case the connection from the subscriber to the television network via the telephone network or can also be done wirelessly.

These dialog options between the central facility TVZ and the participants on the one hand and the participants among themselves via the TVZ on the other hand allow the delivery of an electronic newspaper that appears on the screen of the Television reception side can be displayed and printed out by the printer 10 can. whereby the data that are part of the newspaper can be, for example, in the peripheral input devices 6 of the TVZ are generated.

The newspaper can also contain data from the database 5 can be retrieved. Participants can also create a newspaper, which is then distributed to everyone other participants or only to certain addressed participants is transmitted. Likewise, several participants can together, possibly also with the TVZ, an electronic Create newspaper for all or specific addressed subscribers. Participant side can be connected to the printer 10 and the keyboard 11 in addition to the memory 9 Archive storage, which are not shown in the drawing, be provided, the enable the recording and printing of data.

The data transmission method according to the invention can also be used in conjunction can be used with a so-called electronic mail11 service. Senders, which do not have any participant facilities, the postal administration zeB.

send messages in writing or by telephone that are intended for participants in the data transmission method according to the invention. The postal administration converts these messages into data, which are then sent to the subscriber addressed and transmitted.

Finally it should be noted that the transmitted data is also encrypted in order to rule out unauthorized reception in this way. The encryption of data is already known, so it does not need to be discussed further.

Claims (10)

Claims W Non-wired data transmission method for the transmission of data via a central television transmitter and possibly with this connected decentralized television channels on the one hand to television participants on the other hand, characterized in that such data in television system conform Representation in times of non-broadcasting of a television program about the relevant TV channels are broadcast. 2) data transmission method according to claim 1, characterized that the data are transmitted to one or more participants in an addressed manner. 3) data transmission method according to claim 1 or 2, characterized in that that the data is transmitted in encrypted form. 4) data transmission method according to one of claims 1 to 3, characterized through dialogue between television broadcasters and participants. 5) data transmission method according to claim 4, characterized by Dialog traffic between the participants with the interposition of the Television broadcasting network. 6) data transmission method according to claim 4 or 5, characterized in that that in dialog traffic the connection from the subscriber to the television transmitter network the telephone network takes place. 7) data transmission method according to claim 4 or 5, characterized in that that in dialog traffic the connection from the participants to the television network is wireless he follows. 8) data transmission method according to one of claims 1 to 7, characterized characterized in that a plurality of data channels in frequency division multiplex in a television channel is bundled. 9) data transmission method according to one of claims 1 to 7, characterized characterized in that a plurality of data channels in time division multiplex in a television channel is bundled. 10) data transmission method according to any one of claims 1 to 9, characterized characterized in that the data transmitted to a subscriber is received from a recipient Datastore are recorded.