DE1200349B - Television broadcast system - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

H04n

German class: 21 al - 33/60

Number: 1200 349

File number: S 59076 VIII a / 21 al

Filing date: July 21, 1958

Opening day: September 9, 1965

The invention relates to the distribution of television broadcasts and relates to a television transmission system, in which only a certain group of participants can receive the broadcasts; this includes that in the United States Transmission system known as "pay-as-you-see television" with payment in installments.

In known transmission systems of this type, it is important that the recipient of each individual Be modified in a manner appropriate to the dissemination system in question got to. There are the receiving device z. B. added certain devices that cause the The device only receives unusable signals until a coin has been inserted into a coin-operated machine or a card with certain physical properties is inserted into it, which the participant can purchase for a fee.

For example, television transmission systems for a group of authorized subscribers are known in which the image signal is sent out wirelessly and the accompanying sound is transmitted via a wired sound network and in the course of each of the Lines to the authorized subscribers lying release devices is transmitted.

In these systems, it is disadvantageous that the recipient of the subscriber through the Installation of additional devices for the fee control must be changed. Once he prepares Installation of the auxiliary devices causes considerable inconvenience to the user; z. B. can the recipient cannot be used while the device is connected to it, and it can pass through this device be influenced in an undesirable manner. Second, the user can if the recipient suspends, not recognizing whether the error is now in the actual receiving part or in the additional device As a result, he does not know which repair shop he is contacting must put. The use of the receiver is made possible by the fact that the participant feels compelled to possibly having to use at least two different customer services in undesirably difficult. Whichever part needs to be repaired, the recipient can use it Time neither for the reception of the normal television programs nor that for the members of the distribution system certain programs are used.

The invention avoids these disadvantages and provides a transmission device for television programs of the type described, in which no intervention at all in an existing television receiver-television transmission system

Applicant:

Teleglobe Pay-TV System, Inc., New York, N.Y. (V. St. A.)

Representative:

Dipl.-Ing. G. Schliebs, patent attorney,

Darmstadt, Büchnerstr. 14th

Named as inventor:

Solomon Sagall, New York, N.Y. (V. St. A.)

Claimed priority:

V. St. v. America of July 22, 1957 (673 520) -

ger becomes necessary so that no doubts can arise as to whether there is an error in the receiver itself or in the additional device and whether it is the general customer service for television receivers or customer service for the subscriber system needs to be used.

Although reference has been made to the subscriber system so far, it should be emphasized that the Invention is useful not only where subscribers pay a fee, but also in television broadcasts z. B. for educational purposes whose programs are not aimed at an economic Benefit are broadcast and for which the connected participants pay no fee.

The invention presupposes a television transmission system in which the image signal is transmitted wirelessly and the accompanying tone over a wire tone network and in the course of each of the lines to the authorized Participants lying release devices is transmitted, and is characterized in that the The transmitter transmits the image signal undistorted and, in addition, wirelessly transmits another audio signal, both of which are transmitted by a conventional television receiver are to be received, and that in this receiver an electrical independently working, structurally separate sound reproduction device is set up, which is connected to the wire sound network connected. A locking device affects the playback device and prevents Sound reproduction until another, manually operated release device the influence of the The locking device cancels, so that the accompanying sound sent via wire to the picture broadcast can be heard.

509 660BU

3 4

It is the reception of the send station, with which, for. B. within their housing,

at the same time with the image signal emitted by a module 15 is firmly connected, which is independent

Image content independent audio signal at any time from the conventional receiving part works and

switchable. only needs to be connected to line 13.

An advantageous embodiment of the transmission 5 Once this system is set up, the transmission system according to the invention provides that connection and disconnection at any point transmitting station and sound reproduction device are connected to one another via a part of the line 13 outside the apartment of the subnetwork. The blocking party, e.g. B. at the switching cabinet 14, pre-device is then conveniently taken in the telephone,
net lie. io Anyone who has a usual television receiver

The television transmission system according to the invention has, so can the wirelessly transmitted picture offers compared to the known systems that receive audio and audio signals that are not common technical advantages of a transmission side as appropriate. But only a group of subscribers can be more comfortable for the subscribers and can catch the audio signal transmitted via wire, which is technically simpler and cheaper, and which belongs to the video signal.
quemeren television operation with limited reception. In the case of the execution catch authorization shown in FIG. The possibility of receiving example of the invention are image and sound signals from other television stations with normal purely wireless in the manner described from the transmitting station 10 transmission of image and sound remains the part of the television receiver 12 and the sound reproducers. On the other hand, you can transmit before 20 device 15. However, a locking device is assigned to the sound receiver unlocking the release devices in general 15 in such a way that the audio signal received via the line 13, first before the start of transmission, receives transmission information, in particular program information, immediately wirelessly. cannot be played back. In Fig. 2 exists

In detail, the structure and mode of operation of this lock are based on a distortion device known per se

of the television transmission system according to the invention 25 16, which is at the transmitter and via the line 13 the

as well as other features and advantages from the now sound reproduction device prevents the accompanying sound signal

The following description of typical designs is to be reproduced in an understandable manner. One to be loaded by hand

Examples emerge, the device operating through the drawings acts in such a way with the device

explained. In these 15 shows together that the influence of the locking device

Fig. 1 is the block diagram of a television over 30 16 is switched off and the device the wire tone

transmission system, broadcast can play. In Fig. 2 is this ad-

F i g. 2 the block diagram of an embodiment of the set device as a connected to the line 13-

of the invention and sener equalizer 17 shown. The participant can

Fig. 3 and 4 further design options. e.g. a punch card that he bought from the company

In Fig. 1, 10 denotes a television transmitter conventionally bought for this type of television broadcast of the type, which has an image signal 11, which can be plugged into the device 17. The card emitted by a normal receiver 12 in the will control the device so that the influence of the subscriber's home is received. Although locking device 16 is canceled,
only such a connection is shown, after the in F i g. 3 of course from any number of recipients in the example, the station 10 sends an image signal transmission area of the station 10 again. to the receiver 12 while the accompanying tone signal

In addition to the television signal, the station 10 also radiates via the line 13 to the sound reproduction device 15 a sound signal, which reaches in a known manner, which is in the vicinity of the image receiver. here also received by the receiver 12 and as if, however, the lock consists of one normally Sound is reproduced, but not the switch 18 opened to 45, which is in front of the sound reproduction image signal corresponding accompanying tone signal. This device 15 is in the line 13 and prevents The audio signal, which is independent of the image content, is only used if the audio signal is made audible in this. One as far as the information, as the participant, the manually operated device 19 is used to the television broadcast votes, do not think to close the switch, so that then the device 15 It may be that its receiver is not in order, 50 the audio signal sent over the wire is synchronous with because the sound is missing. The wirelessly transmitted sound reproduces the image signal. This device 19 is signal can also contain messages, e.g. B. a coin-operated machine that has an opening for a slot about how the participant has picture and accompanying sound coin and a switching mechanism that is operated by the can receive synchronously. Coin is triggered and the switch 18 for

The image supplied by the station 10 and kept closed for a certain period of time. Of the

In contrast, the synchronic accompanying tone signal is also encompassed here by the expression "coin"

the line 13 of a telephone network and the brokerage or replacement money of a certain shape, which from

treatment 14 to a sound reproduction device 15 is purchased subscriber.

known execution at the receiving location. Of course, even if in FIG. 1 to 3

This device is from the receiver 12 elec- 60 only one receiver and one sound reproduction

trically independent and structurally separated. device is shown, any number of image

The line 13 of the telephone network is completely receivers and sound equipment to the distribution system

regardless of the lines that are connected to the telephone, as shown in FIG. This figure

serve service. If the transfer according to the invention also shows a first switching cabinet 14, too

transmission system is set up, the sound is 65 which the line 13 leads from the transmitting station 10,

output device 15 set up in the apartment, and those with a number of switches 20 in the supply lines

Special line 13 connects them to the transmitting station. . to the sound reproduction devices 15 are that the

However, the industry can also assign television receivers to television receivers 12, respectively.

In the examples of FIGS. 2 and 3, these switches are always closed, since those previously described Locks and the manually operated switch-on devices control the sound reproduction. In the embodiment of FIG. 4, however, the switches 20 themselves take on the task of locking and are normally open. For this, the device to be operated by hand, with which the Influence of the lock can be lifted, the shape of a conventional telephone set 21, which is in the The subscriber's apartment is available and via the usual telephone line 22 with a second switching cabinet 23 is connected, at which an officer sits, who is called by each participant from his device 21 can be called from. If the sound reproduction for the television transmission system of FIG. 4 desired, so the participant simply calls the officer at the cabinet 23 and instructs her to use his sound player 15 to switch to the telephone network 13. In response to this order, the officer closes the associated switch 20, provided that it is a relatively small system in which both switch cabinets can be served by an officer, or the officer in switch 23 can be notified another officer in switch 14 to close the associated switch, or she can actuate a device which closes the required switch 20. Simultaneously with this, the fee put on the phone bill.

Instead of using the normal telephone system with apparatus 21 and line 22 to call the officer in the Call switch 23, a special telephone can also be provided in each apartment, the the same line that connects the switch 14 to the sound player 15 is used. At a such a system closes each switch 20 for each connection line on the switching cabinet 14, as long as it is open (as drawn in Fig. 4), another switch connected to the line and the switches a special telephone set into a circuit via this line, via which the officer in the switch 14 can be reached. Can just as well take the place of a special telephone set Only one switch, such as a push-button switch or the like, is provided in the subscriber's home be which, when operated, the circuit of a buzzer, lamp or other in which Close to the switching cabinet 14 arranged signal device closes so that the subscriber need only press this button to indicate that he is using the service wishes. With this latter arrangement, as long as one of the switches 20 on the switching cabinet 14 of FIG. 4 is open, another is not shown Switch automatically closed, the line to the subscriber with a signaling device connects, and the circuit for the signaling device is closed as soon as a switching device is operated in the participant's home. Thus, the same line is used in this arrangement Transmission of the audio signal and backwards to signal the desire to make use of it the service is used, and the postal telephone network 21 to 23 does not need to be used will.

From the description of the exemplary embodiments it can be seen that there is no change or interference whatsoever is made in the conventional television receiver 12 so that the subscriber if If the image reception should be poor, I know for sure that the distribution system is not to blame is. However, if something is wrong in the transmission system according to the invention, so this error can only occur in the rendering of the

ίο utter tones through the device 15, and the participant knows immediately that his image receiver 12 is not the cause.

Another advantage of the system according to the invention is that the image signal in conventional Wise transmitted wirelessly from any transmitting station 10 to the conventional image receivers 12 is, while the accompanying tone signal is transmitted via wire and reproduced, according to a method, which has proven itself well in wire technology, so that the transmission system according to the invention no inspection work is required and can be put into operation immediately without being time-consuming Acceptance tests by government agencies are necessary. The new system is also suitable, such as emerges from the description of the various embodiments without difficulty for each type the control, be it distortion and equalization devices according to FIG. 2, coin-operated machines F i g. 3 or the telephone exchange according to FIG. 4th

Claims (4)

Patent claims: 1. Television transmission system for a group of authorized subscribers in which the image signal transmitted wirelessly and the accompanying tone via a wire tone network and in the course of each of the lines is transmitted to the authorized subscribers lying release devices, thereby characterized in that the transmitter undistorted the video signal and an additional audio signal emits wirelessly, both of which can be received by a standard television receiver are, and that with this receiver an electrically independent, structurally separate one Is set up, which is connected to the wired sound network. 2. Television transmission system according to claim 1, characterized in that the accompanying sound is undistorted is transmitted and released by a switch for reception. 3. Television transmission system according to claim 1 and 2, characterized in that the authorized Subscribers are connected to the wired network via an exchange from which they are based Request to be switched to the wire tone transmitter. 4. Television transmission system according to claim 1, characterized in that the accompanying sound is distorted is transmitted and the enabling device includes an equalizer. Considered publications:
U.S. Patent Nos. 2510046, 2538 358, 2769 026; "Fernsehen", 1955, No. 5, pp. 229 to 235;
»Journal Brit. IRE ", April 1956, pp. 205 to 219. 1 sheet of drawings 509 660/314 8.65 © Bundesdruckerei Berlin