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 transmitters

Info

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Withdrawn
Application number
DE19914115093
Other languages
German (de)
Inventor
Friedrich Thoma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19914115093 priority Critical patent/DE4115093A1/en
Publication of DE4115093A1 publication Critical patent/DE4115093A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03JTUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0041Details 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
    • H03J1/005Details 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

The receiver has a selective channel tuner, whose tuning voltage is transmitted by a frequency comparison of the actual frequency and a rated one given by a tuning microcomputer over a serial data line. The receiver contains an additional appts., consisting of a memory (5) for the data words of transmitter determined frequencies of authorised transmitters. The memory is connected to a selective microcomputer (4) for transmitting the stored data words. The computer, in turn, releases the data words to the tuner (1), on coincidence of those in the memory and of the data word in the tuning microcomputer (3). Pref. the latter and the selective microcomputer form a module. USE/ADVANTAGE - For radio, satellite, TV and video receivers, e.g. for pay TV, excluding police and military traffic, with the additional appts. safeguarding only selected transmitter for reception.

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)

1. Funkempfänger mit kanalselektivabstimmbaren Tuner bei dem die Abstimmspannung durch einen Frequenzvergleich der Ist-Frequenz und einer von einem Abstimm-Mikrocomputer abgegebenen Soll- Frequenz mittels serieller Datenleitung übermittelt wird, dadurch gekennzeichnet, daß ein Zusatzgerät, bestehend aus einem Spei­ cher 5 für Datenwörter senderspezifischer Frequenzen der zuge­ lassenen Sender vorgesehen ist, der zur Weitergabe seiner Da­ tenwörter an einen Selektier-Mikrocomputer 4 geschaltet ist, der seinerseits bei Übereinstimmung der Datenwörter im Speicher und des Datenwortes im Abstimm-Mikrocomputer 3 diese zur Weiterleitung an den Tuner freigibt.1. Radio receiver with channel-selectively tunable tuner in which the tuning voltage is transmitted by a frequency comparison of the actual frequency and a target frequency output by a tuning microcomputer by means of serial data line, characterized in that an additional device consisting of a memory 5 for data words transmitter-specific Frequencies of the admitted transmitter is provided, which is passed on to its data words to a selection microcomputer 4 , which in turn releases these for forwarding to the tuner if the data words in memory and the data word in tuning microcomputer 3 match. 2. Funkempfänger nach Anspruch 1. dadurch gekennzeichnet, daß der Abstimm-Mikrocomputer 3 und der Selektier-Mikrocomputer 4 eine bauliche Einheit bilden.2. Radio receiver according to claim 1, characterized in that the tuning microcomputer 3 and the selection microcomputer 4 form a structural unit.
DE19914115093 1991-05-08 1991-05-08 Broadcast receiver with channel selective tuner - has extra memory for data words of frequencies of authorised transmitters Withdrawn DE4115093A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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OP8 Request for examination as to paragraph 44 patent law
8130 Withdrawal