EP0443436B1 - Method for selecting a broadcast programme - Google Patents

Method for selecting a broadcast programme Download PDF

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Publication number
EP0443436B1
EP0443436B1 EP91102078A EP91102078A EP0443436B1 EP 0443436 B1 EP0443436 B1 EP 0443436B1 EP 91102078 A EP91102078 A EP 91102078A EP 91102078 A EP91102078 A EP 91102078A EP 0443436 B1 EP0443436 B1 EP 0443436B1
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EP
European Patent Office
Prior art keywords
programme
frequency
tuned
reception quality
frequencies
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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.)
Expired - Lifetime
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EP91102078A
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German (de)
French (fr)
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EP0443436A3 (en
EP0443436A2 (en
Inventor
Gottfried Grundig E.M.V. Max Grundig Kagerbauer
Mathias Grundig E.M.V. Max Grundig Kalmer
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Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
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Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
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Publication of EP0443436A2 publication Critical patent/EP0443436A2/en
Publication of EP0443436A3 publication Critical patent/EP0443436A3/en
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Publication of EP0443436B1 publication Critical patent/EP0443436B1/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/37—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying segments of broadcast information, e.g. scenes or extracting programme ID

Definitions

  • the invention relates to a method for calling a radio program in mobile radio receivers that can receive and process information according to the radio data system (RDS) and have storage options for storing data relating to the reception frequency and RDS data.
  • RDS radio data system
  • the radio data system transmits data in VHF radio, which transmits information to the listener in addition to the broadcast radio program. This additional information should serve the listener to facilitate the voting process. For this purpose, data are transmitted which indicate the program name so that the listener does not have to listen for a certain time or look up a frequency table to know which program he has set.
  • the broadcasting of an AF list offers great advantages for reception in car radios. This list contains broadcast frequencies on which the same program is broadcast as on the currently set frequency.
  • a PI code which is a code for identifying the program, is also broadcast.
  • a PI code is assigned to each program so that this code can be checked determine whether the same program is received again when the tuning frequency changes.
  • German patent application DE-A-37 25 487 a method is described which relates to the evaluation of the information transmitted with the radio data system.
  • the AF code and / or the PI code are evaluated, so that it is determined at which alternative transmission frequencies the program signal of the current reception frequency can still be received.
  • the alternative transmission frequencies are determined by evaluating the AF code and the PI code, which are then briefly tuned and checked for reception quality. The frequency with the best reception quality is then set. A method is described below which specifies the acquisition of criteria for determining the reception quality. The recipient is then tuned according to the quality of reception.
  • German patent application DE-A-38 32 455 describes a method with which the change from a frequency of a program to a more receivable frequency of the same program is to be carried out if the reception quality on the first frequency is no longer sufficient to to process the RDS data. The change takes place while waiting for an interruption a traffic announcement announcement code is reported.
  • the applicant's patent application EP-A-0 415 132 describes an RDS radio receiver which, when checking the alternative frequencies which are stored in a memory or are contained in the received RDS data, also takes into account those whose regional identification, i.e. second digit of the PI code, differs from that just received if no transmitter with the same PI code can be received. In this way, if a regional program chain is lost, a switch is made to another program in a national program chain if one moves from one regional area to another.
  • each frequency is assigned a rank which is dependent on the identity of the PI code and the reception quality.
  • the reception quality the RDS quality (error-free code recognition) and the RF reception quality, such as multi-path reception, reception field strength and transmitter center, are checked. If no frequency with sufficient RDS quality is found, i.e. If the error rate in the decoding of the RDS data exceeds a permissible limit, the frequency with the highest field strength is set, provided that it is concluded from the RF reception quality that the hearing quality is sufficient.
  • the frequency set in this way remains set for a predeterminable time. A search for the same program chain is only started if there is no RDS identification during this time.
  • the data belonging to the program are combined into one when a program is called RAM loaded.
  • the PI code, the alternative frequencies and the station name are then in the working memory.
  • all stored frequencies are evaluated, the evaluation being based on the RF reception quality and possible RDS decoding.
  • Each frequency is briefly tuned for evaluation.
  • the PI code and the RF quality, in particular the reception field strength, are checked, and the alternative frequency is stored in the working memory with the evaluation of the rank.
  • the next frequency is checked in the same way, the ranking being compared with the last or the best frequency to date.
  • the best frequency is given an identifier, which is required for later tuning, and is stored in the working memory.
  • the working memory is divided into several areas according to the ranking when storing the checked frequencies. Within each area, the frequencies stored there are sorted according to RF reception quality.
  • the ranking levels are arranged in such a way that the highest rank is assigned to the match of the PI code of the program called and the frequency checked.
  • the next stage comprises the frequency whose PI code differs in the second digit.
  • the field-strongest frequency of this ranking level is set when all alternative frequencies that are stored in the working memory are checked and all are checked no frequency with the same PI code was found.
  • a frequency of the last rank has been set, it remains set for a predetermined time, for example 20 seconds. During this time, an attempt is made to identify the PI code. If this is not successful, a search is started.
  • the station name is shown in the display when a program is called up by an RDS receiver, in an advantageous embodiment of the invention, when a frequency is set without PI code identification after a predetermined time, the set frequency is displayed instead of the station name, since under some circumstances a different one Program can be set as that assigned to the program memory location.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Aufruf eines Rundfunkprogrammes in mobilen Rundfunkempfangsgeräten, die Informationen nach dem Radio-Daten-System (RDS) empfangen und verarbeiten können und über Speichermöglichkeiten zum Ablegen von Daten, welche die Empfangsfrequenz und RDS-Daten betreffen, verfügen.The invention relates to a method for calling a radio program in mobile radio receivers that can receive and process information according to the radio data system (RDS) and have storage options for storing data relating to the reception frequency and RDS data.

Mit dem Radio-Daten-System (RDS) werden im UKW-Rundfunk Daten übertragen, welche dem Hörer zusätzlich zum ausgestrahlten Rundfunkprogramm Informationen übermitteln. Diese Zusatzinformationen sollen dem Hörer zur Erleichterung des Abstimmvorgangs dienen. Zu diesem Zweck werden Daten übertragen, die den Programmnamen angeben, so daß der Hörer nicht erst eine gewisse Zeit zuhören muß oder in einer Frequenztabelle nachschlagen muß, um zu wissen, welches Programm er eingestellt hat. Große Vorteile für den Empfang in Autoradios bietet die Ausstrahlung einer AF-Liste. Diese Liste enthält Sendefrequenzen, auf denen das gleiche Programm ausgestrahlt wird, wie auf der gerade eingestellten Frequenz.The radio data system (RDS) transmits data in VHF radio, which transmits information to the listener in addition to the broadcast radio program. This additional information should serve the listener to facilitate the voting process. For this purpose, data are transmitted which indicate the program name so that the listener does not have to listen for a certain time or look up a frequency table to know which program he has set. The broadcasting of an AF list offers great advantages for reception in car radios. This list contains broadcast frequencies on which the same program is broadcast as on the currently set frequency.

Ergänzend zur AF-Liste wird jeweils ein PI-Code, das ist ein Code zur Identifikation des Programms, ausgestrahlt. Jedem Programm ist ein PI-Code zugeordnet, so daß es durch Überprüfung dieses Codes möglich ist festzustellen, ob bei einem Wechsel der Abstimmfrequenz das gleiche Programm wieder empfangen wird.In addition to the AF list, a PI code, which is a code for identifying the program, is also broadcast. A PI code is assigned to each program so that this code can be checked determine whether the same program is received again when the tuning frequency changes.

In der deutschen Offenlegungsschrift DE-A-37 25 487 wird ein Verfahren beschrieben, welches die Auswertung der mit dem Radio-Daten-System übertragenen Information betrifft.In the German patent application DE-A-37 25 487 a method is described which relates to the evaluation of the information transmitted with the radio data system.

Nach diesem Verfahren werden der AF-Code und/oder der PI-Code ausgewertet, so daß festgestellt wird, auf welchen alternativen Sendefrequenzen das Programmsignal der momentanen Empfangsfrequenz noch zu empfangen ist.According to this method, the AF code and / or the PI code are evaluated, so that it is determined at which alternative transmission frequencies the program signal of the current reception frequency can still be received.

Weiterhin werden durch Auswertung des AF-Codes und des PI-Codes die alternativen Sendefrequenzen bestimmt, welche anschließend kurzzeitig abgestimmt und auf Empfangsqualität geprüft werden. Danach wird die Frequenz mit der besten Empfangsqualität eingestellt. Im weiteren wird ein Verfahren beschrieben, das die Gewinnung von Kriterien für die Bestimmung der Empfangsqualität angibt. Die Empfängerabstimmung erfolgt dann nach Maßgabe der Empfangsqualität.Furthermore, the alternative transmission frequencies are determined by evaluating the AF code and the PI code, which are then briefly tuned and checked for reception quality. The frequency with the best reception quality is then set. A method is described below which specifies the acquisition of criteria for determining the reception quality. The recipient is then tuned according to the quality of reception.

In der deutschen Offenlegungsschrift DE-A-38 32 455 wird ein Verfahren beschrieben, mit dem der Wechsel von einer Frequenz eines Programms auf eine besser empfangbare Frequenz des gleichen Programms durchgeführt werden soll, wenn auf der ersten Frequenz die Empfangsqualität nicht mehr ausreichend ist, um die RDS-Daten zu verarbeiten. Der Wechsel vollzieht sich dabei im Wartezustand auf eine Unterbrechung, die durch einen Verkehrsdurchsage-Ankündigungscode gemeldet wird.German patent application DE-A-38 32 455 describes a method with which the change from a frequency of a program to a more receivable frequency of the same program is to be carried out if the reception quality on the first frequency is no longer sufficient to to process the RDS data. The change takes place while waiting for an interruption a traffic announcement announcement code is reported.

In der Patentanmeldung EP-A- 0 415 132 der Anmelderin wird ein RDS-Rundfunkempfänger beschrieben, der bei der Überprüfung der alternativen Frequenzen, die in einem Speicher abgelegt oder in den empfangenen RDS-Daten enthalten sind, auch solche berücksichtigt, deren Regionalkennung, d.h. zweite Stelle des PI-Codes, sich von der gerade empfangenen unterscheidet, wenn kein Sender mit gleichen PI-Code empfangbar ist. Auf diese Weise wird bei Verlust einer regionalen Programmkette auf ein anderes Programm einer überregionalen Programmkette umgeschaltet, falls man von einem Regionalbereich in einen anderen fährt.The applicant's patent application EP-A-0 415 132 describes an RDS radio receiver which, when checking the alternative frequencies which are stored in a memory or are contained in the received RDS data, also takes into account those whose regional identification, i.e. second digit of the PI code, differs from that just received if no transmitter with the same PI code can be received. In this way, if a regional program chain is lost, a switch is made to another program in a national program chain if one moves from one regional area to another.

Beim bekannten Stand der Technik werden also während des Empfangs oder bei Programmabruf alternative Frequenzen überprüft, deren PI-Code identisch ist oder sich nur in der zweiten Stelle, d.h. im Regionalcode, unterscheidet. Wird eine solche alternative Frequenz gefunden, dann wird der Empfänger darauf abgestimmt, anderenfalls ein Suchlauf gestartet.In the known state of the art, alternative frequencies whose PI code is identical or only in the second digit, i.e. in the regional code. If such an alternative frequency is found, the receiver is tuned to it, otherwise a search is started.

Bei gespeicherten Einzelstationen ohne Alternativfrequenzen oder in einem schlecht versorgten Empfangsgebiet, d.h. wenn keine oder wenige alternative Frequenzen existieren, kann es im mobilen Betrieb jedoch vorkommen, daß bei einem Programmaufruf das Empfangssignal aufgrund des momentanen ungünstigen Standorts des Empfängers nicht RDS-tauglich ist. Da keine alternativen Frequenzen vorhanden sind, würde nach den bekannten Verfahren ein Suchlauf gestartet und auf eine Frequenz abgestimmt, die für den Benutzer eventuell unerwünscht ist.In the case of stored single stations without alternative frequencies or in a poorly supplied reception area, i.e. if there are no or few alternative frequencies, it can happen in mobile operation that when a program is called the received signal is not suitable for RDS due to the current unfavorable location of the receiver. There If there are no alternative frequencies, a search would be started according to the known methods and tuned to a frequency that may be undesirable for the user.

Es ist deshalb Aufgabe der Erfindung, eine Strategie für einen Programmaufruf anzugeben, bei der die abgerufene Empfangsfrequenz für eine bestimmte Zeit auch dann eingestellt wird und bleibt, wenn aufgrund der momentan schlechten Empfangslage nach bisher bekanntem Stand der Technik ein Sendersuchlauf gestartet würde.It is therefore an object of the invention to provide a strategy for a program call in which the received reception frequency is and remains set for a certain time even if, due to the currently poor reception situation according to the prior art known to date, a station search would be started.

Diese Aufgabe wird gelöst, indem beim Programmaufruf bei der Überprüfung der alternativen Frequenzen, die im Stationsspeicher enthalten sind, jeder Frequenz ein Rang zugeordnet wird, der von der Identität des PI-Codes und der Empfangsqualität abhängig ist. Bei der Empfangsqualität werden die RDS-Qualität (fehlerfreie Codeerkennung) und die HF-Empfangsqualität, wie Mehrwegempfang, Empfangsfeldstärke und Sendermitte, überprüft. Wenn keine Frequenz mit ausreichender RDS-Qualität gefunden wird, d.h. wenn die Fehlerrate bei der Decodierung der RDS-Daten eine zulässige Grenze überschreitet, wird die Frequenz mit der höchsten Feldstärke eingestellt, sofern aus der HF-Empfangsqualität auf ausreichende Hörqualität geschlossen wird. Die so eingestellte Frequenz bleibt für eine vorbestimmbare Zeit eingestellt. Erst wenn in dieser Zeit keine RDS-Identifikation erfolgt, wird ein Suchlauf nach der gleichen Programmkette gestartet.This object is achieved in that when the program is called up when checking the alternative frequencies contained in the station memory, each frequency is assigned a rank which is dependent on the identity of the PI code and the reception quality. With the reception quality, the RDS quality (error-free code recognition) and the RF reception quality, such as multi-path reception, reception field strength and transmitter center, are checked. If no frequency with sufficient RDS quality is found, i.e. If the error rate in the decoding of the RDS data exceeds a permissible limit, the frequency with the highest field strength is set, provided that it is concluded from the RF reception quality that the hearing quality is sufficient. The frequency set in this way remains set for a predeterminable time. A search for the same program chain is only started if there is no RDS identification during this time.

Beim erfindungsgemäßen Verfahren werden bei einem Programmaufruf die zum Programm gehörenden Daten in einen Arbeitsspeicher geladen. Im Arbeitsspeicher befinden sich dann der PI-Code, die alternativen Frequenzen und der Sendername. Beim Programmaufruf werden alle abgelegten Frequenzen bewertet, wobei die Bewertung nach HF-Empfangsqualität und möglicher RDS-Decodierung erfolgt. Zur Bewertung wird kurzzeitig auf jede Frequenz abgestimmt. Es wird der PI-Code und die HF-Qualität, insbesondere die Empfangsfeldstärke geprüft, und die alternative Frequenz wird mit der Bewertung des Ranges in den Arbeitsspeicher abgelegt. Die Überprüfung der nächsten Frequenz erfolgt in der gleichen Weise, wobei die Bewertung des Ranges mit der letzten bzw. der bisher besten Frequenz verglichen wird. Die beste Frequenz erhält jeweils eine Kennung, die zur späteren Sendereinstellung benötigt wird, und wird in den Arbeitsspeicher abgelegt.In the method according to the invention, the data belonging to the program are combined into one when a program is called RAM loaded. The PI code, the alternative frequencies and the station name are then in the working memory. When the program is called, all stored frequencies are evaluated, the evaluation being based on the RF reception quality and possible RDS decoding. Each frequency is briefly tuned for evaluation. The PI code and the RF quality, in particular the reception field strength, are checked, and the alternative frequency is stored in the working memory with the evaluation of the rank. The next frequency is checked in the same way, the ranking being compared with the last or the best frequency to date. The best frequency is given an identifier, which is required for later tuning, and is stored in the working memory.

Der Arbeitsspeicher wird beim Ablegen der überprüften Frequenzen in mehrere Bereiche entsprechend der Rangfolge eingeteilt. Innerhalb jedes Bereichs werden die dort abgelegten Frequenzen nach HF-Empfangsqualität geordnet.The working memory is divided into several areas according to the ranking when storing the checked frequencies. Within each area, the frequencies stored there are sorted according to RF reception quality.

Die Rangstufen sind so geordnet, daß der Übereinstimmung des PI-Codes des abgerufenen Programms und der überprüften Frequenz der höchste Rang zugeordnet wird. Die nächste Stufe umfaßt die Frequenz, deren PI-Code sich in der zweiten Stelle unterscheidet. Die feldstärkste Frequenz dieser Rangstufe wird eingestellt, wenn bei allen alternativen Frequenzen, die im Arbeitsspeicher abgelegt sind und die alle überprüft wurden, keine Frequenz mit gleichem PI-Code gefunden wurde.The ranking levels are arranged in such a way that the highest rank is assigned to the match of the PI code of the program called and the frequency checked. The next stage comprises the frequency whose PI code differs in the second digit. The field-strongest frequency of this ranking level is set when all alternative frequencies that are stored in the working memory are checked and all are checked no frequency with the same PI code was found.

Alle Frequenzen, bei denen keine PI-Code-Identifikation möglich war, erhalten die dritte Rangstufe. Wenn keine überprüfte Frequenz den beiden höheren Rangstufen zugeordnet werden konnte, erfolgt die Einstellung einer Frequenz aus der letzten Rangstufe, sofern bei einer dieser Frequenzen ausreichende Hörqualität, d.h. ausreichend gute HF-Empfangsqualität gemessen wurden. Ist dies bei mehreren Frequenzen der Fall, wird die beste ausgewählt.All frequencies at which no PI code identification was possible receive the third rank. If no checked frequency could be assigned to the two higher ranks, a frequency from the last rank is set, provided that at one of these frequencies sufficient hearing quality, i.e. sufficiently good RF reception quality was measured. If this is the case with several frequencies, the best one is selected.

Bei der Auswahl der besten Frequenz ohne Identifikation des PI-Codes kann in vorteilhafter Weise noch eine Unterscheidung zwischen Sendern vorgenommen werden, welche erkennbar RDS-Daten ausstrahlen und Sendern, bei denen keine RDS-Daten erkennbar sind, wobei ein Sender als RDS-Sender akzeptiert wird, wenn zwei RDS-Datenblöcke in Folge erkannt werden. Auf fehlerfreie Identifikation des PI-Codes wird in diesem Fall verzichtet.When selecting the best frequency without identifying the PI code, a distinction can advantageously be made between transmitters which emit recognizable RDS data and transmitters in which no RDS data can be identified, a transmitter accepting as an RDS transmitter when two RDS data blocks are recognized in succession. In this case, the PI code is not identified correctly.

Wenn eine Frequenz der letzten Rangstufe eingestellt wurde, bleibt diese für eine vorbestimmte Zeit, z.B. 20 sec, eingestellt. In dieser Zeit wird versucht, den PI-Code zu identifizieren. Gelingt dies nicht, wird ein Suchlauf gestartet.If a frequency of the last rank has been set, it remains set for a predetermined time, for example 20 seconds. During this time, an attempt is made to identify the PI code. If this is not successful, a search is started.

Bei dieser Art der Rangstufung bei einem Programmaufruf wird für gespeicherte Einzelstationen eine längere Zeit zur Identifizierung vorgegeben. Wenn also der Programmaufruf gerade an einem Ort erfolgt, an dem schlechte Empfangsverhältnisse vorliegen, wird nicht gleich ein Suchlauf gestartet. Wenn man mit dem Auto ein Stück weiterfährt, kann die Empfangssituation bereits gut sein und die eingestellte Frequenz identifiziert werden. Es erfolgt in diesem Fall kein unerwünschter Sendersuchlauf innerhalb der gleichen Programmkette.With this type of ranking when a program is called, a longer time is given for identification for stored individual stations. If the program is being called at a location with poor reception conditions, a search is not started immediately. If you drive a bit further by car, the reception situation can already be good and the set frequency can be identified. In this case there is no unwanted station search within the same program chain.

Da bei einem Programmaufruf bei einem RDS-Empfänger der Sendername im Display angezeigt wird, wird in einer vorteilhaften Ausgestaltung der Erfindung beim Einstellen einer Frequenz ohne PI-Code-Identifikation nach einer vorbestimmten Zeit statt des Sendernamens die eingestellte Frequenz angezeigt, da unter Umständen ein anderes Programm eingestellt sein kann, als das dem Pogrammspeicherplatz zugeordnete.Since the station name is shown in the display when a program is called up by an RDS receiver, in an advantageous embodiment of the invention, when a frequency is set without PI code identification after a predetermined time, the set frequency is displayed instead of the station name, since under some circumstances a different one Program can be set as that assigned to the program memory location.

Claims (4)

  1. Method of calling up a radio programme in radio receivers which are capable of receiving and processing information by the radio data system, which have nonvolatile memories for storing data which relate to the programme and the RDS data, which have a working memory into which the data associated with the programme are transferred from the nonvolatile memory when a programme is called up, and in which the alternative frequencies stored in the working memory are tested and assessed for reception quality when a programme is called up, characterized in that the procedure for tuning to one of the reception frequencies called up from the working memory is as in the ranking sequence below:
    a) that frequency is tuned to which has the best reception quality and has the desired programme identification code which was previously transferred from the programme memory;
    b) the frequency having the best reception quality is tuned to whose programme identification code differs only in the second place if, in step a), the desired programme identification code was not recognized for any of the frequencies which are stored in the working memory and whose reception quality is adequate;
    c) the frequency having the best RF reception quality and having RDS signal recognized as present, but initially not having programme identification, remains tuned to for a specified time if, in step a) and b) an identical programme identification code or one differing only in the second place was not recognized for any frequency examined;
    d) after the specified time, a search for the desired programme network is started if, in step c) no programme identification was possible during the specified time.
  2. Method according to Claim 1, characterized in that, if the frequency not having programme identification is tuned to, the station name on the display is erased for the specified time and the frequency tuned to is displayed instead.
  3. Method according to Claim 1 or 2, characterized in that, during the examination and assessment of all the alternative frequencies, the frequencies examined are sorted and arranged in the working memory in accordance with their ranking sequence groupwise and according to reception quality.
  4. Method according to one or more of Claims 1 to 3, characterized in that, when a reception frequency is tuned to for which no PI code is recognized, a frequency is tuned to for which it is known that RDS data signals are broadcast.
EP91102078A 1990-02-19 1991-02-14 Method for selecting a broadcast programme Expired - Lifetime EP0443436B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4004987 1990-02-19
DE4004987A DE4004987A1 (en) 1990-02-19 1990-02-19 Station selection in RDS system - using non-volatile memories to store program frequency and reception quality information

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EP0443436A2 EP0443436A2 (en) 1991-08-28
EP0443436A3 EP0443436A3 (en) 1992-04-15
EP0443436B1 true EP0443436B1 (en) 1995-06-14

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JP2571247B2 (en) * 1988-01-07 1997-01-16 パイオニア株式会社 Receiving frequency selection method for radio data receiver
JP2760552B2 (en) * 1988-03-17 1998-06-04 三洋電機株式会社 Receiving machine
DE3928828A1 (en) * 1989-08-31 1991-03-07 Grundig Emv RDS BROADCAST RECEIVER WITH A DEVICE FOR AUTOMATIC SWITCHING TO AN ALTERNATIVE REGIONAL PROGRAM

Also Published As

Publication number Publication date
DE4004987C2 (en) 1993-04-29
EP0443436A3 (en) 1992-04-15
DE59105680D1 (en) 1995-07-20
EP0443436A2 (en) 1991-08-28
DE4004987A1 (en) 1991-08-22

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