DE4115093A1 - Broadcast receiver with channel selective tuner - has extra memory for data words of frequencies of authorised transmitters - Google Patents
Broadcast receiver with channel selective tuner - has extra memory for data words of frequencies of authorised transmittersInfo
- Publication number
- DE4115093A1 DE4115093A1 DE19914115093 DE4115093A DE4115093A1 DE 4115093 A1 DE4115093 A1 DE 4115093A1 DE 19914115093 DE19914115093 DE 19914115093 DE 4115093 A DE4115093 A DE 4115093A DE 4115093 A1 DE4115093 A1 DE 4115093A1
- Authority
- DE
- Germany
- Prior art keywords
- microcomputer
- data words
- memory
- tuning
- tuner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
- H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop
Abstract
Description
In mehreren Staaten werden vom Benutzer eines Funkempfängers, wie z. B. eines Rundfunk-, Fernseh- oder Videoempfängers für den Empfang des Programmes bestimmter Sender oder auch für be stimmte Programme, Gebühren verlangt, andererseits wird auch der Empfang bestimmter Sender z. B. Polizeifunk oder Militärfunk, verboten.In several countries, the user of a radio receiver, such as B. a radio, television or video receiver for the reception of the program of certain stations or for be agreed programs, fees charged, on the other hand, the Reception of certain channels z. B. police radio or military radio, forbidden.
Für die Öffentlichkeit besteht somit das Bedürfnis nach Empfangsgeräten, die nur die gebührenfreien oder erlaubten Sender empfangen können.So there is a need for the public Receiving devices that only allow or free of charge Can receive stations.
Die Aufgabe der Erfindung besteht darin, einen Empfänger schaltungsmäßig so aufzubauen, daß nur bestimmte ausgewählte Sender empfangen werden können. Dies kann durch ein Zusatzge rät nach der Erfindung, das in das Empfangsgerät eingebaut wird erfolgen. Zur Sicherheit kann dieses Zusatzgerät so mit dem Empfangsgerät verbunden werden, daß Manipulationen die Geräte funktion zerstören.The object of the invention is a receiver in terms of circuitry so that only certain selected ones Stations can be received. This can be done by an additional ge advises according to the invention, which is installed in the receiving device respectively. For safety, this additional device can be used with the Receiving device that are tampered with the devices destroy function.
Es ist üblich, in den Fernsehempfängern, Rundfunkempfängern Satellitenempfängern und Videogeräten einen kanalselektivab stimmbaren Tuner zu verwenden. Die Frequenz des Kanals wird mit der Abstimmspannung an den Kapazitätsdioden variiert. In den hochwertigen Geräten wird die Abstimmspannung durch einen Frequenzvergleich (PLL) zwischen Soll-Frequenz und Ist-Frequenz gebildet. Die Soll-Frequenz wird durch einen Abstimm-Mikro computer bestimmt. Die Übertragung der Soll-Frequenzdaten zwischen Mikrocomputer und PLE im Tuner erfolgt mittels seriellen Datenbus (I2C-Bus). Der Abstimm-Mikrocomputer errechnet oder liest aus einem Speicher, je nach Kanaleinstellung, diese Daten. Die Erfindung besteht darin, daß ein Zusatzgerät, bestehend aus einem Speicher für Datenwörter (Frequenzen) zugelassener Sender, vorgesehen ist, der zur Weitergabe seiner Datenwörter an einen Selektiermikrocomputer geschaltet ist, der seinerseits bei Übereinstimmung der Datenwörter im Speicher und der Datenwörter (Frequenzen) im Abstimm-Mikrocomputer diese zur Weiterleitung an den Tuner frei gibt.It is common to use a channel selectable tuner in television receivers, radio receivers, satellite receivers and video equipment. The frequency of the channel is varied with the tuning voltage on the capacitance diodes. In the high-quality devices, the tuning voltage is formed by a frequency comparison (PLL) between the target frequency and the actual frequency. The target frequency is determined by a tuning micro computer. The transmission of the target frequency data between the microcomputer and the PLE in the tuner takes place via a serial data bus (I 2 C-Bus). Depending on the channel setting, the tuning microcomputer calculates or reads this data from a memory. The invention is that an additional device, consisting of a memory for data words (frequencies) approved transmitter, is provided, which is connected to pass on its data words to a selection microcomputer, which in turn if the data words in the memory and the data words (frequencies) match Tuning microcomputer releases them for forwarding to the tuner.
In der Zeichnung ist der grundsätzliche Aufbau eines Empfängers nach der Erfindung näher dargestellt.In the drawing is the basic structure of a receiver shown in more detail according to the invention.
Der Tuner 1 enthält einen Antenneneingang 1a und eine Frequenz vergleichsschaltung (PLU) 1b. Die ZF-Verarbeitung ist mit 2 be zeichnet. Der Abstimm-Mikrocompter 3 überträgt über die serielle Datenleitung a ein durch Abstimmung gebildetes Datenwort (Kanal und Frequenz) an den Selektier-Computer 4, der dieses Datenwort mit denen im Speicher 6 gespeicherten Datenwörtern (Frequenzen) für die zugelassenen Sender vergleicht. Bei Übereinstimmung der vom Abstimm-Mikrocomputer 3 und vom Speicher 5 anliegenden Da tenwörter gibt der Selektier-Mikrocomputer 4 das Datenwort für den Tuner 1 frei. Der Tuner 1 ist somit auf einen zugelassenen Sender eingestellt während alle nicht im Speicher gespeicherten Sender blockiert sind. The tuner 1 contains an antenna input 1 a and a frequency comparison circuit (PLU) 1 b. The ZF processing is marked with 2 be. The tuning microcomputer 3 transmits via the serial data line a a data word (channel and frequency) formed by tuning to the selection computer 4 , which compares this data word with the data words (frequencies) stored in the memory 6 for the approved transmitters. If the tuning words from the tuning microcomputer 3 and the memory 5 match, the selection microcomputer 4 releases the data word for the tuner 1 . The tuner 1 is thus set to an approved transmitter while all transmitters not stored in the memory are blocked.
Ist vorgesehen, die Empfänger schon in der Fertigung senderse lektiv auszubilden, d. h., nur für bestimmte Sender zuzulassen, so kann der Abstimm-Mikrocomputer 3 und der Selektier-Mikrocom puter 4 zu einer Einheit zusammengefaßt werden. If the receiver is intended to be formed in the production of transmitters selectively, that is to say only to allow for certain transmitters, the tuning microcomputer 3 and the selection microcomputer 4 can be combined into one unit.
BezugszeichenlisteReference symbol list
1 Tuner
2a Antenne
1b PLL
2 ZF-Verarbeitung
3 Abstimm-Mikrocomputer
4 Selektier-Microcomputer
5 Speicher abc Datenbus 1 tuner
2 a antenna
1 b PLL
2 IF processing
3 tuning microcomputers
4 selection microcomputers
5 memory abc data bus
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914115093 DE4115093A1 (en) | 1991-05-08 | 1991-05-08 | Broadcast receiver with channel selective tuner - has extra memory for data words of frequencies of authorised transmitters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914115093 DE4115093A1 (en) | 1991-05-08 | 1991-05-08 | Broadcast receiver with channel selective tuner - has extra memory for data words of frequencies of authorised transmitters |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4115093A1 true DE4115093A1 (en) | 1992-11-12 |
Family
ID=6431287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19914115093 Withdrawn DE4115093A1 (en) | 1991-05-08 | 1991-05-08 | Broadcast receiver with channel selective tuner - has extra memory for data words of frequencies of authorised transmitters |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4115093A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4326590C1 (en) * | 1993-08-07 | 1994-10-20 | Inst Rundfunktechnik Gmbh | Method for blocking or reproducing certain programmes in a television receiver or recording them in a video recorder |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3980958A (en) * | 1974-07-29 | 1976-09-14 | Zenith Radio Corporation | Signal seeking tuning system with illegal channel detection means |
US4247951A (en) * | 1978-10-31 | 1981-01-27 | Micro Power Systems, Inc. | Frequency synthesizer with unauthorized frequency inhibiting means |
US4510623A (en) * | 1982-07-23 | 1985-04-09 | General Electric Company | Television channel lockout |
GB2155263A (en) * | 1984-03-02 | 1985-09-18 | Philips Electronic Associated | Frequency synthesised multichannel radio apparatus |
-
1991
- 1991-05-08 DE DE19914115093 patent/DE4115093A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3980958A (en) * | 1974-07-29 | 1976-09-14 | Zenith Radio Corporation | Signal seeking tuning system with illegal channel detection means |
US4247951A (en) * | 1978-10-31 | 1981-01-27 | Micro Power Systems, Inc. | Frequency synthesizer with unauthorized frequency inhibiting means |
US4510623A (en) * | 1982-07-23 | 1985-04-09 | General Electric Company | Television channel lockout |
GB2155263A (en) * | 1984-03-02 | 1985-09-18 | Philips Electronic Associated | Frequency synthesised multichannel radio apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4326590C1 (en) * | 1993-08-07 | 1994-10-20 | Inst Rundfunktechnik Gmbh | Method for blocking or reproducing certain programmes in a television receiver or recording them in a video recorder |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |