EP0469341A2 - Broadcast receiver with a radio data signal decoder - Google Patents
Broadcast receiver with a radio data signal decoder Download PDFInfo
- Publication number
- EP0469341A2 EP0469341A2 EP91111312A EP91111312A EP0469341A2 EP 0469341 A2 EP0469341 A2 EP 0469341A2 EP 91111312 A EP91111312 A EP 91111312A EP 91111312 A EP91111312 A EP 91111312A EP 0469341 A2 EP0469341 A2 EP 0469341A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- memory
- data signal
- alternative
- radio data
- 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.)
- Granted
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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]
Definitions
- the object of the property right is a new radio receiver with a radio data signal decoder and memory for the alternative frequency information in the radio data signal.
- the area of application of the new radio receiver is primarily intended for the motor vehicle.
- a radio receiver is described with a memory in which, in addition to the PI code characterizing a specific program, the alternative frequencies assigned to this program are stored.
- An evaluation memory is also assigned to each memory location for a frequency. The frequency with which the individual alternative frequencies have recently been set is noted in this memory.
- the older invention offers the possibility of switching the receiver to the alternative frequency with the greatest number of frequencies, since this probably guarantees the best reception.
- the radio receiver according to the invention is connected to an antenna 1 for receiving the carrier frequency of the transmitter to which the tuner 2 is set by an automatic transmitter selection 3.
- the MPX signal the modulation of the received carrier frequency
- This signal is, on the one hand, made to be heard by the loudspeaker 6 via the stereo decoder 4 and the NF amplifier 5 and, on the other hand, is routed to the RDS decoder 9 via a 57 kHz filter 7 and an RDS demodulator 8.
- An output of the RDS decoder 9 is connected to a control input of the automatic transmitter selection 3.
- the automatic transmitter selection 3 is also connected to an output of the tuner 2, to which a signal about the quality of the received carrier frequency, for. B. about field strength, multipath and the like, is removable.
- the tuner 2 and the automatic transmitter selection 3 thus represent a type of control loop. This serves to select the best received carrier frequency of a program that has been set once and is identified by the assigned PI code in the radio data signal.
- the radio data signal has so far been broadcast in the FM range of broadcasting.
- FM carrier frequencies have a limited range.
- only a limited number of carrier frequencies are available in the FM range.
- VHF carrier frequencies at a certain spatial distance are therefore used to transmit different programs.
- a car radio tuned to a certain frequency would, for. B. Listen to different programs on a longer travel route. In between there would be a travel section, on which the quality of the received transmitter signal leaves much to be desired, if it does not completely disappear.
- the alternative frequencies communicated to the radio receiver via the radio data signal for the currently set radio program now offers the possibility of switching to one of the alternative frequencies in the event of poor reception of the currently set carrier frequency, in the hope that reception on the newly selected carrier frequency will be better.
- the program Before the program is heard in this newly selected alternative frequency, it must be checked whether the frequency at the receiving location actually transmits the desired program or whether another program with a different PI code is already being received at the receiving location at this frequency. It must therefore be checked whether the PI code has been preserved.
- the car radio remains muted during the review period. In order to keep the duration of the program interruption as short as possible, additional learning circles are provided in the new radio receiver, which work together with the memory shown in FIG. 2 as follows.
- Each automatic transmitter selection 3 includes a plurality of station buttons 10 with which the driver can set certain carrier frequencies in the tuner 2. In a programming step that is not explained in detail, these carrier frequencies are previously assigned to the respective station buttons. This frequency specification has been stored in a frequency memory 11.
- the station key 10 is also assigned a specific program.
- Each station button 10 thus also has a very specific PI code which can be stored in a PI code memory 12.
- the alternative frequency indications belonging to this PI code are also transmitted in the radio data signal, for the storage of which an AF memory 13 is provided.
- the above-mentioned memories are mostly in the microprocessor modules of the transmitter selection automatics tik 3 integrated.
- the microprocessor in the automatic transmitter selection 3 receives a start command from the tuner for a program for setting a well-received alternative frequency of the same program.
- the automatic transmitter setting 3 has learning memories 14 for each stored alternative frequency, of which there is of course also the frequency set via the station key.
- These learning memories 14 are initially empty. If the reception quality falls below the predefined threshold for the first time after the station key has been reassigned, then the learning memory 14, which belongs to the previously set frequency, is activated. If, after the aforementioned random access to one of the other alternative frequencies, one with good reception quality is found and the tuner is finally tuned to it, then this hop frequency is entered in the learning memory 14.
- This process is repeated on a longer journey or more frequently in the mountainous area on shorter journeys.
- the frequency which is stored in the frequency memory 11 is also set again at some point. If the reception quality again becomes too weak after it has been set again, information about a frequency is now available in the learning memory 14, which should preferably be set because the change to this hopping frequency has already been successful. A check of the PI code on this reset hop frequency can thus be omitted. The newly set transmitter can thus be switched through immediately.
- the program returns to the selection of any other alternative frequency.
- a counter 15 is expediently connected to each of the learning memories 14, which counts the frequency with which the hopping frequency read in the learning memory has been successfully set. At the next frequency jump, the learning memory with the highest counter reading is then preferred for the new setting.
- the radio receiver will have a matrix after a longer period of operation, in which the alternative frequencies and the jump frequencies assigned to each PI code are listed.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Selective Calling Equipment (AREA)
Abstract
Description
Der Gegenstand des Schutzrechts ist ein neuer Rundfunkempfänger mit einem Radiodatensignaldecoder und -speicher für die alternativen Frequenzangaben im Radiodatensignal.The object of the property right is a new radio receiver with a radio data signal decoder and memory for the alternative frequency information in the radio data signal.
Als Einsatzgebiet des neuen Rundfunkempfängers ist in erster Linie an das Kraftfahrzeug gedacht. In dem älteren Patent DE 39 17 236 ist ein Rundfunkempfänger mit einem Speicher beschrieben, in dem neben dem ein bestimmtes Programm kennzeichnenden PI-Code die diesem Programm zugeordneten alternativen Frequenzen abgelegt sind. Jedem Speicherplatz für eine Frequenz ist zudem ein Bewertungsspeicher zugeordnet. In diesem Speicher wird die Häufigkeit vermerkt, mit welcher die einzelnen alternativen Frequenzen in letzter Zeit eingestellt worden sind.The area of application of the new radio receiver is primarily intended for the motor vehicle. In the older patent DE 39 17 236 a radio receiver is described with a memory in which, in addition to the PI code characterizing a specific program, the alternative frequencies assigned to this program are stored. An evaluation memory is also assigned to each memory location for a frequency. The frequency with which the individual alternative frequencies have recently been set is noted in this memory.
Ist beim Betrieb des Rundfunkempfängers während der Fahrt in diesem eine der selteneren alternativen Frequenzen des gewünschten Programms von der Senderwahlautomatik eingestellt worden und verschlechtert sich deren Empfang, so bietet die ältere Erfindung die Möglichkeit, den Empfänger auf die alternative Frequenz mit der größten Häufigkeitszahl umzuschalten, da diese wohl am ehesten guten Empfang gewährleistet.If one of the rarer alternative frequencies of the desired program was set by the automatic transmitter selection and the reception deteriorates when the radio receiver is in operation while driving, the older invention offers the possibility of switching the receiver to the alternative frequency with the greatest number of frequencies, since this probably guarantees the best reception.
Für die Lösung dieser Aufgabe, direkt auf den Sender mit dem wahrscheinlich besten Empfang umzuschalten, zeigt die durch die Merkmale des Anspruchs 1 gekennzeichnete Erfindung einen anderen Weg.For the solution of this task, to switch directly to the transmitter with probably the best reception, the invention characterized by the features of claim 1 shows another way.
Die Erfindung wird anhand eines
- in Figur 1 dargestellten Blockshaltbildes und einer
- in Figur 2 dargestellten Speicheraufteilung näher erläutert.
- block diagram shown in Figure 1 and one
- memory allocation shown in Figure 2 explained in more detail.
Der erfindungsgemäße Rundfunkempfänger ist an einer Antenne 1 zum Empfang der Trägerfrequenz des Senders angeschlossen auf den der Tuner 2 von einer Senderwahlautomatik 3 eingestellt ist. An Ausgang des Tuners 2 ist das MPX-Signal, die Modulation der empfangenen Trägerfrequenz, annehmbar. Dieses Signal wird, einerseits über den Stereodecoder 4 und den NF-Verstärker 5 vom Lautsprecher 6 zu Gehör gebracht und andererseits über einen 57-kHz-Filter 7 und einem RDS-Demodulator 8 zum RDS-Decoder 9 geführt. Ein Ausgang des RDS-Decoders 9 ist mit einem Steuereingang der Senderwahlautomatik 3 verbunden.The radio receiver according to the invention is connected to an antenna 1 for receiving the carrier frequency of the transmitter to which the tuner 2 is set by an automatic transmitter selection 3. At the output of tuner 2, the MPX signal, the modulation of the received carrier frequency, is acceptable. This signal is, on the one hand, made to be heard by the
Die Senderwahlautomatik 3 ist darüber hinaus an einen Ausgang des Tuners 2 angeschlossen, an dem ein Signal über die Qualität der empfangenen Trägerfrequenz, z. B. über Feldstärke, Mehrwegeempfang und dergleichen, abnehmbar ist.The automatic transmitter selection 3 is also connected to an output of the tuner 2, to which a signal about the quality of the received carrier frequency, for. B. about field strength, multipath and the like, is removable.
Der Tuner 2 und die Senderwahlautomatik 3 stellen somit eine Art Regelkreis dar. Diese dient der Wahl der am besten zu empfangenen Trägerfrequenz eines einmal eingestellten Programms, das durch den zugeordneten PI-Code im Radiodatensignal gekennzeichnet ist.The tuner 2 and the automatic transmitter selection 3 thus represent a type of control loop. This serves to select the best received carrier frequency of a program that has been set once and is identified by the assigned PI code in the radio data signal.
Bekanntlich wird das Radiodatensignal bisher im UKW-Bereich des Rundfunks ausgestrahlt. UKW-Trägerfrequenzen haben eine nur begrenzte Reichweite. Andererseits stehen im UKW-Bereich nur eine begrenzte Anzahl von Trägerfrequenzen zur Verfügung. Daher werden UKW-Trägerfrequenzen in einem bestimmten räumlichen Abstand zur Übertragung unterschiedlicher Programme benutzt. Ein auf eine bestimmte Frequenz abgestimmtes Autoradio würde z. B. auf einer längeren Reiseroute unterschiedlich Programme zu Gehör bringen. Dazwischen läge ein Reiseabschnitt, auf welchem die Qualität des empfangenen Sendersignals sehr zu wünschen übrig läßt, wenn es nicht gar ganz verschwindet.As is known, the radio data signal has so far been broadcast in the FM range of broadcasting. FM carrier frequencies have a limited range. On the other hand, only a limited number of carrier frequencies are available in the FM range. VHF carrier frequencies at a certain spatial distance are therefore used to transmit different programs. A car radio tuned to a certain frequency would, for. B. Listen to different programs on a longer travel route. In between there would be a travel section, on which the quality of the received transmitter signal leaves much to be desired, if it does not completely disappear.
Die über das Radiodatensignal dem Rundfunkempfänger mitgeteilten alternativen Frequenzen für das gerade eingestellte Rundfunkprogramm bietet nun die Möglichkeit, bei schlechter werdendem Empfang der gerade eingestellten-Trägerfrequenz auf eine der alternativen Frequenzen umzuschalten, in der Hoffnung, daß der Empfang auf der neugewählten Trägerfrequenz besser ist. Bevor das Programm in dieser neugewählten alternativen Frequenz jedoch zu Gehör gebracht wird, muß geprüft sein, ob die Frequenz am Empfangsort tatsächlich auch das gewünschte Programm überträgt oder ob am Empfangsort bereits auf dieser Frequenz ein anderes Programm mit einem anderen PI-Code empfangen wird. Es muß also überprüft werden, ob der PI-Code erhalten geblieben ist. Während der Überprüfungszeit bleibt das Autoradio Stummgeschaltet. Um die Dauer der Programmunterbrechung möglichst kurz zu halten, sind in dem neuen Rundfunkempfänger zusätzliche Lernkreise vorgesehen, die mit dem in Figur 2 dargestellten Speicher wie folgt zusammenarbeiten.The alternative frequencies communicated to the radio receiver via the radio data signal for the currently set radio program now offers the possibility of switching to one of the alternative frequencies in the event of poor reception of the currently set carrier frequency, in the hope that reception on the newly selected carrier frequency will be better. Before the program is heard in this newly selected alternative frequency, it must be checked whether the frequency at the receiving location actually transmits the desired program or whether another program with a different PI code is already being received at the receiving location at this frequency. It must therefore be checked whether the PI code has been preserved. The car radio remains muted during the review period. In order to keep the duration of the program interruption as short as possible, additional learning circles are provided in the new radio receiver, which work together with the memory shown in FIG. 2 as follows.
Zu jeder Senderwählautomatik 3 gehören mehrere Stationstasten 10, mit denen der Fahrer bestimmte Trägerfrequenzen im Tuner 2 einstellen kann. In einem nicht näher erläuterten Programmierschritt sind diese Trägerfrequenzen zuvor den jeweiligen Stationstasten zugeordnet. Diese Frequenzangabe ist in einem Frequenzspeicher 11 abgelegt worden.Each automatic transmitter selection 3 includes a plurality of station buttons 10 with which the driver can set certain carrier frequencies in the tuner 2. In a programming step that is not explained in detail, these carrier frequencies are previously assigned to the respective station buttons. This frequency specification has been stored in a
Mit der Festlegung der Frequenz ist aber der Stationstaste 10 zugleich ein bestimmtes Programm zugeordnet. Damit gehört zu jeder Stationstaste 10 auch ein ganz bestimmter PI-Code, der in einem PI-Codespeicher 12 abgelegt werden kann. In dem Radiodatensignal werden auch die zu diesem PI-Code gehörenden alternativen Frequenzangaben übertragen, für deren Ablage ein AF-Speicher 13 vorgesehen ist.With the determination of the frequency, the station key 10 is also assigned a specific program. Each station button 10 thus also has a very specific PI code which can be stored in a
Die genannten Speicher sind meistens in den Mikroprozessorbausteinen der Senderwählautomatik 3 integriert.The above-mentioned memories are mostly in the microprocessor modules of the transmitter selection automatics tik 3 integrated.
Fällt die Empfangsqualität auf der mit der Stationstaste eingestellten Trägerfrequenz bei der Reise unter eine vorgegebene Schwelle, dann erhält der Mikroprozessor in der Senderwählautomatik 3 vom Tuner einen Startbefehl für ein Programm zur Einstellung einer gutempfangbaren alternativen Frequenz des gleichen Programms.If the reception quality on the carrier frequency set with the station key falls below a predetermined threshold when traveling, the microprocessor in the automatic transmitter selection 3 receives a start command from the tuner for a program for setting a well-received alternative frequency of the same program.
In dem AF-Speicher 13 sind diese alternativen Frequenzen rein dem Zufall nachgeordnet. Daher beginnt das Programm mit der Einstellung einer beliebigen der alternativen Frequenzen.In the
Um dieser Einstellung eine Richtung zu geben, verfügt die erfindungsgemäße Sendereinstellautomatik 3 über Lernspeicher 14 für jede gespeicherte alternative Frequenz, unter denen sich natürlich auch die über die Stationstaste eingestellte Frequenz befindet.In order to give this setting a direction, the automatic transmitter setting 3 according to the invention has learning
Diese Lernspeicher 14 sind zunächst leer. Fällt die Empfangsqualität nach der Neubelegung der Stationstaste erstmals unter die vorgegebene Schwelle, dann wird der Lernspeicher 14, de zu der bisher eingestellten Frequenz gehört, aktiviert. Ist nun nach dem erwähnten Zufallszugriff auf eine deranderen alternativen Frequenzen eine mit guter Empfangsqualität gefunden und der Tuner darauf endgültig eingestellt, dann wird diese Sprungfrequenz in dem Lernspeicher 14 eingegeben.These
Dieser Vorgang wiederholt sich auf einer längeren Fahrt oder auch in gebirgiger Gegend bei kürzeren Fahrten häufiger. Bei einem solchen Wechsel der Einstellung des Tuners 2 wird auch irgendwann die Frequenz wieder eingestellt, die im Frequenzspeicher 11 abgelegt ist. Wird nach deren erneuten Einstellung die Empfangsqualität wiederum zu schwach, steht in dem Lernspeicher 14 nun eine Information über eine Frequenz zur Verfügung, die bevorzugt eingestellt werden sollte, weil der Wechsel zu dieser Sprungfrequenz schon einmal erfolgreich war. Eine Überprüfung des PI-Codes auf dieser wieder eingestellten Sprungfrequenz kann damit unterbleiben. Der neueingestellte Sender kann somit unmittelbar durchgeschaltet werden.This process is repeated on a longer journey or more frequently in the mountainous area on shorter journeys. With such a change in the setting of the tuner 2, the frequency which is stored in the
Ist die im Lernspeicher 14 abgelegte Sprungfrequenz am momentanen Empfangsort wegen schlechter Qualität nicht einstellbar, dann kehrt das Programm zur Wahl einer beliebigen anderen alternativen Frequenz zurück.If the hop frequency stored in the
In gebirgiger Gegend ist häufiger zu erwartet, daß die im Lernspeicher 14 abgelegte Sprungfrequenz nicht empfangbar ist. Man kann daher auch jeder alternativen Frequenz mehrere Lernspeicher zuordnen. In diesem Fall verbindet man zweckmäßigerweise mit jedem der Lernspeicher 14 einen Zähler 15, der die Häufigkeit zählt, mit der die im Lernspeicher eingelesene Sprungfrequenz erfolgreich eingestellt worden ist. Beim nächstfälligen Frequenzsprung wird dann der Lernspeicher mit dem höchsten Zählerstand für die neue Einstellung bevorzugt.In mountainous areas it is more often to be expected that the hopping frequency stored in the
Wie sich aus der Darstellung ergibt, ist es für die Erfindung unbeachtlich, ob der Inhalt des Frequenzspeichers 11 bei der Programmierung einer Stationstaste bestimmt wurde oder bei einer anderen Handabstimmung des Rundfunkempfängers eingelesen wurde.As can be seen from the illustration, it is irrelevant to the invention whether the content of the
Bei entsprechend ausreichendem Speicherplatz verfügt der Rundfunkempfänger nach einer längeren Betriebsdauer über eine Matrix, in der für jeden PI-Code die alternativen Frequenzen und die diesem zugeordneten Sprungfrequenzen aufgelistet sind.If there is sufficient storage space, the radio receiver will have a matrix after a longer period of operation, in which the alternative frequencies and the jump frequencies assigned to each PI code are listed.
Bewegt sich der Fahrer in einem Gebiet, in dem auf einer der vom RDS-Decoder gelieferten alternativen Frequenz schon ein anderes Programm empfangbar ist, so wird das Aufsuchen dieser Frequenz weitgehend vermieden, weil diese Frequenz nicht als Sprungfrequenz eingetragen wird. Denn das Einlesen der Sprungfrequenz in den Lernspeicher 14 erfolgt erst, wenn bei dem ersten zufälligen Aufsuchen einer alternativen Frequenz auch die Übereinstimmung der PI-Code festgestellt wurde.If the driver moves in an area in which another program can already be received on one of the alternative frequencies supplied by the RDS decoder, searching for this frequency is largely avoided because this frequency is not entered as the hopping frequency. This is because the jump frequency is only read into the
Claims (3)
daß jedem Speicher für eine alternative Frequenzangabe (13) ein Lernspeicher (14) zugeordnet ist, zur Aufnahme derjenigen Sprungfrequenz auf die der Rundfunkempfänger nach einem Wechsel eingestellt ist.1. radio receiver with a radio data signal decoder and memory for the alternative frequency information in the radio data signal and with a microprocessor with a program for changing to an alternative frequency, characterized in that
that each memory for an alternative frequency indication (13) is assigned a learning memory (14) for recording that hopping frequency to which the radio receiver is set after a change.
dadurch gekennzeichnet,
daß jedem Speicher (13) für eine alternative Frequenzangabe mehrere Lernspeicher (14) zugeordnet sind.2. round receiver according to claim 1,
characterized,
that each memory (13) is assigned a plurality of learning memories (14) for an alternative frequency indication.
dadurch gekennzeichnet,
daß jeder Lernspeicher mit einem Zähler (15) verbunden ist, in dem die Häufigkeit der Wechsel auf die eingetragene Sprungfrequenz gezählt werden.3. radio receiver according to claim 2,
characterized,
that each learning memory is connected to a counter (15) in which the frequency of changes to the entered hop frequency are counted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4024366 | 1990-08-01 | ||
| DE4024366A DE4024366C2 (en) | 1990-08-01 | 1990-08-01 | Car radio with a radio data signal decoder |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0469341A2 true EP0469341A2 (en) | 1992-02-05 |
| EP0469341A3 EP0469341A3 (en) | 1992-05-06 |
| EP0469341B1 EP0469341B1 (en) | 1995-12-20 |
Family
ID=6411413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91111312A Expired - Lifetime EP0469341B1 (en) | 1990-08-01 | 1991-07-08 | Broadcast receiver with a radio data signal decoder |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5428827A (en) |
| EP (1) | EP0469341B1 (en) |
| JP (1) | JP3176655B2 (en) |
| AT (1) | ATE131980T1 (en) |
| DE (2) | DE4024366C2 (en) |
| ES (1) | ES2082888T3 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2568001Y2 (en) * | 1991-09-13 | 1998-04-08 | 株式会社ケンウッド | Radio receiver |
| US5634205A (en) * | 1994-04-19 | 1997-05-27 | Uniden Corporation | Radio equipment based on AFC system with temperature detection and method of automatic frequency control |
| JP3272880B2 (en) * | 1994-09-02 | 2002-04-08 | パイオニア株式会社 | RDS receiver |
| US5714932A (en) * | 1996-02-27 | 1998-02-03 | Radtronics, Inc. | Radio frequency security system with direction and distance locator |
| DE19622349C2 (en) * | 1996-06-04 | 2000-06-29 | Bosch Gmbh Robert | Method and provision of a control signal for the control of a radio receiver after a change of location |
| TW377533B (en) * | 1996-11-06 | 1999-12-21 | Koninkl Philips Electronics Nv | Radio receiver for receiving a main radio broadcast signal and a monolithic integrated circuit for use in such radio receiver |
| US6021320A (en) * | 1997-06-27 | 2000-02-01 | Delco Electronics Corporation | Broadcast receiver providing selectable categories of available broadcast signals |
| EP1032128A1 (en) * | 1999-02-23 | 2000-08-30 | Mannesmann VDO Aktiengesellschaft | Method for processing transmitter and program related data in an FM RDS receiver |
| EP1056203A1 (en) * | 1999-05-26 | 2000-11-29 | Mannesmann VDO Aktiengesellschaft | Method for selection of a tuning frequency |
| EP1094627A1 (en) * | 1999-10-20 | 2001-04-25 | Sony International (Europe) GmbH | Method and device to retrieve RDS information |
| US6775378B1 (en) | 1999-10-25 | 2004-08-10 | Concerto Software, Inc | Blended agent contact center |
| US6832203B1 (en) | 1999-11-05 | 2004-12-14 | Cim, Ltd. | Skills based contact routing |
| US7230927B1 (en) | 1999-12-07 | 2007-06-12 | Aspect Software, Inc. | Non-blocking expandable call center architecture |
| US6707906B1 (en) | 2000-03-13 | 2004-03-16 | Concerto Software, Inc. | Outbound calling system in a contact center |
| US6766011B1 (en) | 2000-06-16 | 2004-07-20 | Concerto Software, Inc. | Method and apparatus for controlling a contact center |
| US6778951B1 (en) | 2000-08-09 | 2004-08-17 | Concerto Software, Inc. | Information retrieval method with natural language interface |
| US6778660B2 (en) | 2001-04-06 | 2004-08-17 | Concerto Software, Inc. | Customer interaction system |
| US7970342B1 (en) | 2006-02-06 | 2011-06-28 | Griffin Technology Inc. | Digital music player accessory with digital communication capability |
| JP5983378B2 (en) * | 2012-12-10 | 2016-08-31 | アイコム株式会社 | Receiving machine |
| US10425939B2 (en) * | 2015-11-30 | 2019-09-24 | At&T Intellectual Property I, L.P. | Method and apparatus for automated signal analysis and reporting among RF receiver devices |
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|---|---|---|---|---|
| JPS6437138A (en) * | 1987-08-01 | 1989-02-07 | Pioneer Electronic Corp | Discriminating method for channel frequency data transmission system in radio data system |
| EP0328440A1 (en) * | 1988-02-05 | 1989-08-16 | STMicroelectronics S.A. | Selection system for receiving radio or television broadcasts |
| DE3835870C1 (en) * | 1988-10-21 | 1990-01-18 | Blaupunkt-Werke Gmbh, 3200 Hildesheim, De |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8003087A (en) * | 1980-05-29 | 1982-01-04 | Philips Nv | RECEIVER WITH A TRANSMITTER SWITCH. |
| DE3121034C2 (en) * | 1981-05-27 | 1987-01-02 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | FM receiver |
| JPS63136829A (en) * | 1986-11-28 | 1988-06-09 | Pioneer Electronic Corp | Radio data system receiver |
| DE3709523A1 (en) * | 1987-03-23 | 1988-10-13 | Bosch Gmbh Robert | BROADCAST RECEIVER WITH AT LEAST ONE TRAFFIC RADIO DECODER |
| US5170487A (en) * | 1989-01-19 | 1992-12-08 | Seiko Corp. | Paging system with multiple frequencies and multiple protocols |
| DE3917236C1 (en) * | 1989-05-26 | 1990-08-02 | Blaupunkt-Werke Gmbh, 3200 Hildesheim, De |
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- 1990-08-01 DE DE4024366A patent/DE4024366C2/en not_active Expired - Fee Related
-
1991
- 1991-07-08 ES ES91111312T patent/ES2082888T3/en not_active Expired - Lifetime
- 1991-07-08 AT AT91111312T patent/ATE131980T1/en not_active IP Right Cessation
- 1991-07-08 DE DE59107109T patent/DE59107109D1/en not_active Expired - Fee Related
- 1991-07-08 EP EP91111312A patent/EP0469341B1/en not_active Expired - Lifetime
- 1991-07-24 US US07/735,059 patent/US5428827A/en not_active Expired - Lifetime
- 1991-08-01 JP JP19284091A patent/JP3176655B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6437138A (en) * | 1987-08-01 | 1989-02-07 | Pioneer Electronic Corp | Discriminating method for channel frequency data transmission system in radio data system |
| EP0328440A1 (en) * | 1988-02-05 | 1989-08-16 | STMicroelectronics S.A. | Selection system for receiving radio or television broadcasts |
| DE3835870C1 (en) * | 1988-10-21 | 1990-01-18 | Blaupunkt-Werke Gmbh, 3200 Hildesheim, De |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 13, no. 230 (E-764)26. Mai 1989 & JP-A-1 037 138 ( PIONEER ELECTRONIC ) 7. Februar 1989 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0469341B1 (en) | 1995-12-20 |
| DE59107109D1 (en) | 1996-02-01 |
| JP3176655B2 (en) | 2001-06-18 |
| JPH04234213A (en) | 1992-08-21 |
| DE4024366C2 (en) | 1993-12-09 |
| ATE131980T1 (en) | 1996-01-15 |
| DE4024366A1 (en) | 1992-02-13 |
| EP0469341A3 (en) | 1992-05-06 |
| ES2082888T3 (en) | 1996-04-01 |
| US5428827A (en) | 1995-06-27 |
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