EP1282336A2 - Method of operating a wireless audio system with dynamic channel assignment - Google Patents
Method of operating a wireless audio system with dynamic channel assignment Download PDFInfo
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- EP1282336A2 EP1282336A2 EP02016679A EP02016679A EP1282336A2 EP 1282336 A2 EP1282336 A2 EP 1282336A2 EP 02016679 A EP02016679 A EP 02016679A EP 02016679 A EP02016679 A EP 02016679A EP 1282336 A2 EP1282336 A2 EP 1282336A2
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- transmission
- individual
- audio
- channel
- frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Definitions
- the present invention relates to a method for operating a wireless Audio system, and in particular a method according to the preamble of Claim 1.
- a wireless audio system operated with such a method is e.g. B. from known from DE 198 29 897 A1.
- Such a known audio system comprises an audio signal processing device, which has a central control unit in the form of a microcomputer, a Remote control unit and at least one from the audio signal processing device and the remote control unit is a separate speaker.
- the Remote control unit on a radio transmitter and the at least one speaker a radio receiver.
- the remote control unit and the at least one speaker also one radio transmitter and one each Radio receiver.
- the at least one speaker is for receiving Remote control signals provided from the remote control unit to the at least one speaker can be transmitted.
- One in the audio system provided audio transmission system transmits audio signal information from Audio signal processing device to the at least one speaker.
- a control unit can be provided for the at least one loudspeaker.
- control systems in such a known wireless audio system usually a dynamic channel selection from a predetermined number of Channels with a fixed frequency grid, e.g. Audio signal information from one central control unit to transmit to individual speakers. It is the individual speakers e.g. from the control unit Transmission channel assigned.
- a carrier frequency band corresponds to each transmission channel fixed frequency position and fixed frequency bandwidth.
- the known audio system usually has several channels in a fixed Frequency grids assigned by the user.
- the available radio frequency band does not give a fixed channel grid how to do this e.g. is the case with cordless phones. Rather it becomes a so-called dynamic channel grid used. This means that the respective Control units make a selection according to predetermined reception quality criteria, on which channel with a predetermined frequency a transmission process to be held.
- interferers One operates wireless parallel to such a known audio system Headphones or microphones (hereinafter referred to as interferers) for which Frequencies are used that differ from those of the audio transmission system used frequency range overlap, so interference can Audio transmission between the audio transmission unit and the speakers occur.
- FIG. 2a For example, an assignment of four shown schematically in FIG. 2a Speakers A, B, C and D to the four channels I, II, III and IV before, and finds then the disturbance of channels II and III outlined in FIG. 2b takes place, then the central control unit a channel reassignment, as shown in Fig. 2b, perform, with speakers B, C and D now channels IV, V and VI can be assigned.
- Such an audio transmission system uses only two frequency channels Transmission, one of the two channels usually proves to be sufficient undisturbed, even if the interferers do not work in the same channel grid.
- an audio transmission system has additional channels and / or extended an additional central unit, e.g. for simultaneous operation multiple wireless speakers on one TV and one wireless Stereo system, the need for bandwidth will increase and the possibility of Evasion from interferers limited.
- the object of the present invention is therefore to provide a method according to the Develop the preamble of claim 1 so that despite limited Bandwidth to avoid or facilitate interference from interferers.
- the method according to the invention is based on the knowledge that interferers in usually use no (or any other) channel grid than the audio system. By the measures according to the invention can the usability of Improve frequency band.
- each receiver unit e.g. each loudspeaker box
- the reception field strength is measured and sent to the central unit via the Control radio link transmitted. There is then from the incoming data Channel image determines that the band occupancy situation for each individual Audio receiving station plays.
- the frequencies selected in this way do not necessarily have to be a predetermined channel grid, but can be individual be set, as is provided in accordance with the measures of claim 2.
- FIG. 1 shows a schematic representation of a known audio system as it is e.g. is known from DE 198 29 897 A1.
- Each of the loudspeakers 3 to 8 comprises a control 31, 41, ..., integrated therein. 81, a single-channel audio signal receiver 32, 42, ..., 82 and one bidirectional radio data transmission unit 33, 43, ..., 83.
- Each of the two central units 1 and 2 comprises an integrated controller 11 or 21, a plurality of single-channel audio channel transmitters 12a to 12d or 22a to 22d, and a bidirectional radio data transmission unit 13 or 23.
- control signals from the Central units are transmitted to the loudspeakers and via control channels Control signals between the speakers and the central units replaced.
- control signals e.g. Control commands regarding a desired volume setting on one of the speakers given two central units to a loudspeaker.
- a speaker which receives these control signals is then e.g. a readjustment of the Volume setting. After the readjustment has taken place, you can then use the Control channel feedback from the loudspeaker to the central unit, that the desired volume setting has been made.
- the integrated controls 11, 12, 31, 41, ..., 81 are preferably each in Form of a microcomputer.
- Each of the integrated controls uses one in the prior art dynamic channel selection from a predetermined number of channels with fixed Frequency grid (channel frequency grid).
- the received field strength is measured and on the central unit transmits via the control radio link.
- a channel image is then created in the central unit Band occupancy situation for each individual audio receiving station.
- Such a channel map for a single receiving station is shown schematically in Fig. 3 shown by the shaded area shown in gray, which of the Fault in the individual channels corresponds. As you can see, find for those there underlying receiving station the strongest interference on channels I, VI and VII instead. Channels II, III, IV and V, on the other hand, are relatively undisturbed, and therefore best for the audio signal transmission to the receiving station under consideration suitable.
- the Frequencies not on a previously defined channel grid can be set individually.
- FIG. 4 This is shown schematically in FIG. 4.
- each speaker 3, 4, 5, ..., 8 an individually optimized Channel assignment can be assigned. This is particularly true for the one in FIG. 1 shown case of two different interferers 1, 2 interesting. Due to the different interferences, these interferers have different effects on the respective speakers. So each speaker has its own, individual interference pattern, as exemplified for a loudspeaker in FIG. 3 is shown.
- the measures according to the invention can now be used individually for each individual speaker an appropriate review and dynamic Channel adjustment can be done, which is for the individual speaker Compensate the given disturbance pattern in an individually optimized manner.
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Abstract
Die vorliegende Erfindung betrifft ein Verfahren zum Betreiben eines drahtlosen Audiosystems, welches mindestes ein zentrales Steuersystem (1) und ein Audioübertragungssystem bestehend aus Sendern und Empfangseinheiten umfaßt, und bei welchem eine Übertragung von Steuer- und/oder Audioinformationssignalen über eine Vielzahl von individuellen Übertragungskanälen erfolgen kann. Dabei findet ein Überprüfen der Übertragungsqualität einzelner Übertragungskanäle auf der einer jeden Empfangseinheit zugeordneten Funkstrecke zu Beginn der Übertragung durch sukzessive Durchführung von Messungen von frequenzspezifischen Empfangsfeldstärken bei im Verhältnis zur Bandbreite eines einzelnen Übertragungskanals relativ kleinen Frequenzschritten statt, wobei für einen jeden einzelnen Frequenzschritt die Empfangsfeldstärke über die Steuerfunkstrecke an die Zentraleinheit übermittelt wird. Sodann wird ein Kanalabbild in der Zentraleinheit festgelegt, welches die Bandbelegungssituation für jede einzelne Audioempfangsstation wiedergibt. Für jede Empfangseinheit findet sodann ein Ermitteln der Frequenzen statt, bei denen die Empfangsfeldstärke am wenigsten gestört ist, und die jeweils ausgewählt und zugewiesen werden. <IMAGE>The present invention relates to a method for operating a wireless audio system, which comprises at least a central control system (1) and an audio transmission system consisting of transmitters and receiving units, and in which control and / or audio information signals can be transmitted via a large number of individual transmission channels , The transmission quality of individual transmission channels is checked on the radio link assigned to each receiving unit at the beginning of the transmission by successively carrying out measurements of frequency-specific reception field strengths with frequency steps which are relatively small in relation to the bandwidth of an individual transmission channel, the reception field strength for each individual frequency step being greater than Control radio link is transmitted to the central unit. A channel map is then defined in the central unit, which reproduces the band occupancy situation for each individual audio receiving station. The frequencies at which the reception field strength is least disturbed are then determined for each receiving unit and are selected and assigned in each case. <IMAGE>
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Betreiben eines drahtloses
Audiosystems, und insbesondere ein Verfahren nach dem Oberbegriff des
Anspruchs 1.The present invention relates to a method for operating a wireless
Audio system, and in particular a method according to the preamble of
Ein mit einem solchen Verfahren betriebenes drahtloses Audiosystem ist z. B. aus der DE 198 29 897 A1 bekannt.A wireless audio system operated with such a method is e.g. B. from known from DE 198 29 897 A1.
Ein solches bekanntes Audiosystem umfaßt ein Audiosignalverarbeitungsgerät, welches eine zentrale Steuereinheit in Form eines Mikrocomputers aufweist, eine Fernbedieneinheit und mindestens einen vom Audiosignalverarbeitungsgerät und der Fernbedieneinheit ortsgetrennten Lautsprecher. Dabei weist die Fernbedieneinheit einen Funksender auf und der mindestens eine Lautsprecher einen Funkempfänger. Wahlweise umfassen die Fernbedieneinheit und der mindestens eine Lautsprecher auch jeweils einen Funksender und einen Funkempfänger. Der mindestens eine Lautsprecher ist zum Empfang von Fernbediensignalen vorgesehen, die von der Fernbedieneinheit zu dem mindestens einen Lautsprecher übertragen werden. Ein im Audiosystem vorgesehenes Audioübertragungssystem überträgt Audiosignalinformationen vom Audiosignalverarbeitungsgerät zu dem mindestens einen Lautsprecher. Auch in dem mindestens einen Lautsprecher kann eine Steuereinheit vorgesehen sein.Such a known audio system comprises an audio signal processing device, which has a central control unit in the form of a microcomputer, a Remote control unit and at least one from the audio signal processing device and the remote control unit is a separate speaker. The Remote control unit on a radio transmitter and the at least one speaker a radio receiver. Optionally include the remote control unit and the at least one speaker also one radio transmitter and one each Radio receiver. The at least one speaker is for receiving Remote control signals provided from the remote control unit to the at least one speaker can be transmitted. One in the audio system provided audio transmission system transmits audio signal information from Audio signal processing device to the at least one speaker. Also in a control unit can be provided for the at least one loudspeaker.
Die Steuersysteme in einem solchen bekannten drahtlosen Audiosystem benutzen in der Regel eine dynamische Kanalwahl aus einer vorgegebenen Anzahl von Kanälen mit festem Frequenzraster, um z.B. Audiosignalinformationen von einer zentralen Steuereinheit zu einzelnen Lautsprechern zu übertragen. Dabei wird den individuellen Lautsprechern z.B. von der Steuereinheit jeweils ein Übertragungskanal zugewiesen.Use the control systems in such a known wireless audio system usually a dynamic channel selection from a predetermined number of Channels with a fixed frequency grid, e.g. Audio signal information from one central control unit to transmit to individual speakers. It is the individual speakers e.g. from the control unit Transmission channel assigned.
Ein solches festes Frequenzraster der Kanäle ist beispielhaft anhand der Fig. 2a veranschaulicht. Jedem Übertragungskanal entspricht ein Trägerfrequenzband mit fester Frequenzlage und fester Frequenzbandbreite.Such a fixed frequency grid of the channels is exemplified with reference to FIG. 2a illustrated. A carrier frequency band corresponds to each transmission channel fixed frequency position and fixed frequency bandwidth.
Kommt es nun zu einer Störung der Übertragungsfrequenzen durch einen Störsender, so werden einzelne oder mehrere Kanäle gestört, wie in Fig. 2b gezeigt ist. Durch diese Störung werden die entsprechenden Kanäle für eine weitere Übertragung blockiert.If there is a disturbance of the transmission frequencies by a Interference transmitters, so individual or multiple channels are disturbed, as in Fig. 2b is shown. Due to this interference, the corresponding channels for one further transmission blocked.
Das bekannte Audiosystem besitzt in der Regel mehrere Kanäle in einem festen Frequenzraster, die durch den Benutzer zugewiesen werden.The known audio system usually has several channels in a fixed Frequency grids assigned by the user.
Das zur Verfügung stehende Funkfrequenzband gibt dabei kein festes Kanalraster vor, wie dies z.B. bei schnurlosen Telefonen der Fall ist. Vielmehr wird ein sogenanntes dynamisches Kanalraster benutzt. D.h., daß die jeweiligen Steuereinheiten nach vorbestimmten Empfangsgütekriterien eine Auswahl treffen, auf welchem Kanal mit vorbestimmter Frequenz ein Übertragungsvorgang stattfinden soll.The available radio frequency band does not give a fixed channel grid how to do this e.g. is the case with cordless phones. Rather it becomes a so-called dynamic channel grid used. This means that the respective Control units make a selection according to predetermined reception quality criteria, on which channel with a predetermined frequency a transmission process to be held.
Betreibt man parallel zu einem solchen bekannten Audiosystem drahtlose Kopfhörer oder Mikrofone (im folgenden als Störer bezeichnet), für die Frequenzen benutzt werden, die sich mit dem vom Audioübertragungssystem benutzten Frequenzbereich überschneiden, so können Störungen der Audioübertragung zwischen der Audioübertragungseinheit und den Lautsprechern auftreten.One operates wireless parallel to such a known audio system Headphones or microphones (hereinafter referred to as interferers) for which Frequencies are used that differ from those of the audio transmission system used frequency range overlap, so interference can Audio transmission between the audio transmission unit and the speakers occur.
Liegt z.B. eine in Fig. 2a schematisch wiedergegebene Zuordnung von vier Lautsprechern A, B, C und D zu den vier Kanälen I, II, III und IV vor, und findet dann die in Fig. 2b skizzierte Störung der Kanäle II und III statt, so kann die zentrale Steuereinheit eine Kanalneubelegung, wie in Fig. 2b gezeigt, durchführen, bei der die Lautsprecher B, C und D nunmehr den Kanälen IV, V und VI zugewiesen werden.For example, an assignment of four shown schematically in FIG. 2a Speakers A, B, C and D to the four channels I, II, III and IV before, and finds then the disturbance of channels II and III outlined in FIG. 2b takes place, then the central control unit a channel reassignment, as shown in Fig. 2b, perform, with speakers B, C and D now channels IV, V and VI can be assigned.
Verwendet ein solches Audioübertragungssystem nur zwei Frequenzkanäle zur Übertragung, so erweist sich in der Regel einer der beiden Kanäle als ausreichend ungestört, auch wenn die Störer nicht im gleichen Kanalraster arbeiten.Such an audio transmission system uses only two frequency channels Transmission, one of the two channels usually proves to be sufficient undisturbed, even if the interferers do not work in the same channel grid.
Wird ein solches Audioübertragungssystem aber um zusätzliche Kanäle und/oder eine zusätzliche Zentraleinheit erweitert, z.B. für den gleichzeitigen Betrieb mehrerer drahtloser Lautsprecher an einem TV-Gerät und einer drahtlosen Stereoanlage, wird der Bedarf an Bandbreite ansteigen und die Möglichkeit des Ausweichens vor Störern begrenzt.If such an audio transmission system has additional channels and / or extended an additional central unit, e.g. for simultaneous operation multiple wireless speakers on one TV and one wireless Stereo system, the need for bandwidth will increase and the possibility of Evasion from interferers limited.
Aufgabe der vorliegenden Erfindung ist es deshalb, ein Verfahren nach dem
Oberbegriff des Anspruchs 1 so weiter zu entwickeln, daß trotz begrenzter
Bandbreite ein Ausweichen gegenüber Störern ermöglicht bzw. erleichtert wird.The object of the present invention is therefore to provide a method according to the
Develop the preamble of
Erfindungsgemäß wird diese Aufgabe durch ein Verfahren nach Anspruch 1
gelöst. Die abhängigen Ansprüche betreffen vorteilhafte Ausführungsformen der
vorliegenden Erfindung.According to the invention, this object is achieved by a method according to
Dem erfindungsgemäßen Verfahren liegt die Erkenntnis zugrunde, daß Störer in der Regel kein (oder ein anderes) Kanalraster nutzen als das Audiosystem. Durch die erfindungsgemäßen Maßnahmen läßt sich die Nutzbarkeit des Frequenzbandes verbessem.The method according to the invention is based on the knowledge that interferers in usually use no (or any other) channel grid than the audio system. By the measures according to the invention can the usability of Improve frequency band.
Erfindungsgemäß überprüft bei Beginn der Übertragung (Einschalten des Systems) jede Empfangseinheit (z.B. jede Lautsprecherbox) die Kanalzuordnung.According to the invention checked at the start of the transmission (switching on the Systems) each receiver unit (e.g. each loudspeaker box) the channel assignment.
Diese Prüfung erfolgt nicht im ursprünglichen Kanalraster, sondern in einem Frequenzraster, das sehr viel feiner ist als die Kanalbandbreite. This check is not carried out in the original channel grid, but in one Frequency grid that is much finer than the channel bandwidth.
Für jeden der in diesem feinen Frequenzraster abgetasteten Frequenzschritte wird die Empfangsfeldstärke gemessen und an die Zentraleinheit über die Steuerfunkstrecke übermittelt. Dort wird dann aus den eingehenden Daten ein Kanalabbild ermittelt, das die Bandbelegungssituation für jede einzelne Audioempfangsstation wiedergibt.For each of the frequency steps scanned in this fine frequency grid the reception field strength is measured and sent to the central unit via the Control radio link transmitted. There is then from the incoming data Channel image determines that the band occupancy situation for each individual Audio receiving station plays.
Durch die hohe Auflösung der kleinen Frequenzschritte bei der Abtastung können damit für jede Empfangseinheit die jeweils ungestörtesten Frequenzbereiche ausgewählt und zugewiesen werden.Due to the high resolution of the small frequency steps when scanning thus the most undisturbed frequency ranges for each receiving unit selected and assigned.
Die so ausgewählten Frequenzen müssen dabei nicht notwendigerweise auf
einem vorher festgelegten Kanalraster liegen, sondern können individuell
eingestellt werden, wie gemäß den Maßnahmen des Anspruchs 2 vorgesehen ist.The frequencies selected in this way do not necessarily have to be
a predetermined channel grid, but can be individual
be set, as is provided in accordance with the measures of
Treten während des Betriebes Störungen auf, z.B. durch das Einschalten eines drahtlosen Kopfhörers in der Nachbarschaft, hat der Benutzer die Möglichkeit den Kanalwahlvorgang selbst neu zu starten.If malfunctions occur during operation, e.g. by turning on a wireless headphones in the neighborhood, the user has the option of To restart the channel selection process yourself.
Die Vorteile und Merkmale der vorliegenden Erfindung ergeben sich auch aus der nachfolgenden Erläuterung von bevorzugten Ausführungsbeispielen in Verbindung mit den Zeichnungen.The advantages and features of the present invention also result from the following explanation of preferred embodiments in connection with the drawings.
Es zeigen:
- Fig. 1
- eine schematische Darstellung eines Audiosystems;
- Fig. 2a
- eine schematische Darstellung eines herkömmliches festen Kanalrasters, welches in einem in Fig. 1 gezeigten bekannten Audiosystem verwendet wird;
- Fig. 2b
- eine schematische Darstellung eines herkömmliches festen Kanalrasters, bei dem eine Störung einzelner Kanäle auftritt und Abhilfe durch eine dynamische Kanalwahl getroffen wird;
- Fig. 3
- eine schematische Darstellung des Kanalabbilds einer Empfangseinheit bei dem in Fig. 1 gezeigten Audiosystem; und
- Fig. 4
- eine erfindungsgemäße ungleichmäßige Kanalzuweisung unter Berücksichtigung der individuellen Empfangssituation.
- Fig. 1
- a schematic representation of an audio system;
- Fig. 2a
- is a schematic representation of a conventional fixed channel grid, which is used in a known audio system shown in Fig. 1;
- Fig. 2b
- a schematic representation of a conventional fixed channel grid, in which a disturbance of individual channels occurs and remedial action is taken by dynamic channel selection;
- Fig. 3
- a schematic representation of the channel image of a receiving unit in the audio system shown in Fig. 1; and
- Fig. 4
- an uneven channel assignment according to the invention, taking into account the individual reception situation.
Fig.1 zeigt eine schematische Darstellung eines bekannten Audiosystems, wie es z.B. aus der DE 198 29 897 A1 bekannt ist.1 shows a schematic representation of a known audio system as it is e.g. is known from DE 198 29 897 A1.
Dieses umfaßt beispielsweise eine erste Zentraleinheit 1 und eine zweite
Zentraleinheit 2 sowie eine Reihe von Lautsprechern 3 bis 8.This includes, for example, a first
Jeder der Lautsprecher 3 bis 8 umfaßt eine darin integrierte Steuerung 31, 41, ...,
81, einen einkanaligen Audiosignalempfänger 32, 42, ... ,82 und eine
bidirektionale Datenfunkübertragungseinheit 33, 43, ... ,83.Each of the loudspeakers 3 to 8 comprises a
Jede der beiden Zentraleinheiten 1 bzw. 2 umfaßt eine integrierte Steuerung 11
bzw. 21, mehrere einkanalige Audiokanalsender 12a bis 12d bzw. 22a bis 22d,
sowie eine bidirektionale Datenfunkübertragungseinheit 13 bzw. 23.Each of the two
Über die bidirektionalen Datenfunkübertragungseinheiten der Lautsprecher bzw. der Zentraleinheiten werden über Audiokanäle Audiosignale von den Zentraleinheiten an die Lautsprecher übermittelt und über Steuerkanäle Steuersignale zwischen den Lautsprechern und den Zentraleinheiten ausgetauscht. Mittels der Steuersignale werden z.B. Steuerbefehle hinsichtlich einer an einem Lautsprecher gewünschten Lautstärkeeinstellung von einer der beiden Zentraleinheiten an einen Lautsprecher gegeben. In einem Lautsprecher, der diese Steuersignale empfängt, erfolgt sodann z.B. eine Nachregelung der Lautstärkeeinstellung. Nach erfolgter Nachregelung kann sodann über den Steuerkanal eine Rückmeldung vom Lautsprecher an die Zentraleinheit erfolgen, daß die gewünschte Lautstärkeeinstellung erfolgt ist.Via the bidirectional radio data transmission units of the loudspeakers or of the central units are audio signals from the Central units are transmitted to the loudspeakers and via control channels Control signals between the speakers and the central units replaced. By means of the control signals e.g. Control commands regarding a desired volume setting on one of the speakers given two central units to a loudspeaker. In a speaker, which receives these control signals is then e.g. a readjustment of the Volume setting. After the readjustment has taken place, you can then use the Control channel feedback from the loudspeaker to the central unit, that the desired volume setting has been made.
Die integrierten Steuerungen 11, 12, 31, 41,....,81 sind bevorzugterweise jeweils in Form eines Mikrocomputers ausgeführt.The integrated controls 11, 12, 31, 41, ..., 81 are preferably each in Form of a microcomputer.
Jede der integrierten Steuerungen, gleich ob in einer der Zentraleinheiten 1, 2
oder in einem Lautsprecher 32,...,82 benutzt beim Stand der Technik eine
dynamische Kanalwahl aus einer vorgegebenen Anzahl von Kanälen mit festem
Frequenzraster (Kanalfrequenzraster).Each of the integrated controls, whether in one of the
Bei Inbetriebnahme eines in Fig. 1 gezeigten Systems gleichen die einzelnen
Steuereinheiten in den Zentraleinheiten 1, 2 bzw. den Lautsprechem 3 bis 8
herkömmlicherweise eine Kanalbelegung ab, bis allen Audio-Funkübertragungsstrecken
ein Kanal zugewiesen ist. Durch die Vielzahl der
Audio- Funkübertragungsstrecken verbleiben in der Regel nur wenige freie Kanäle
zurück. Kommt nunmehr beim Betrieb eines in Fig. 1 gezeigten Audiosystems zu
Störungen der Funkübertragungsstrecken durch einen Störer, so gibt es nur wenig
freie Kanäle, auf die ausgewichen werden kann. Diese Situation wurde bereits in
der Beschreibungseinleitung in Verbindung mit Fig. 2a und 2b diskutiert.When a system shown in FIG. 1 is started up, the individual systems are the same
Control units in the
Hier schafft nun das erfindungsgemäße Verfahren Abhilfe:The method according to the invention now remedies this:
Bei Beginn der Übertragung (Einschalten des Systems) überprüft jede Empfangseinheit in den Lautsprecherboxen die Bandbelegung. Diese Prüfung erfolgt nicht im ursprünglichen Kanalraster, sondern in einem Raster das sehr viel kleiner ist als die Bandbreite eines individuellen Kanals. At the start of the transmission (switching on the system) everyone checks Receiver unit in the loudspeaker boxes the band assignment. This exam does not take place in the original channel grid, but in a grid that very much is smaller than the bandwidth of an individual channel.
Für jeden dieser Frequenzschritte wird die Empfangsfeldstärke gemessen und an die Zentraleinheit über die Steuerfunkstrecke übermittelt.For each of these frequency steps, the received field strength is measured and on the central unit transmits via the control radio link.
In der Zentraleinheit entsteht dann ein Kanalabbild, das die Bandbelegungssituation für jede einzelne Audio-Empfangsstation wiedergibt.A channel image is then created in the central unit Band occupancy situation for each individual audio receiving station.
Ein solches Kanalabbild für eine einzelne Empfangsstation ist schematisch in Fig. 3 durch den grau schraffiert wiedergegebenen Störbereich gezeigt, welcher der Störung in den einzelnen Kanälen entspricht. Wie man sieht, finden für die dort zugrundegelegte Empfangsstation die stärksten Störungen bei den Kanälen I, VI und VII statt. Die Kanäle II, III, IV und V sind dagegen relativ ungestört, und damit für die Audiosignalübertragung zu der betrachteten Empfangsstation am besten geeignet.Such a channel map for a single receiving station is shown schematically in Fig. 3 shown by the shaded area shown in gray, which of the Fault in the individual channels corresponds. As you can see, find for those there underlying receiving station the strongest interference on channels I, VI and VII instead. Channels II, III, IV and V, on the other hand, are relatively undisturbed, and therefore best for the audio signal transmission to the receiving station under consideration suitable.
Durch die hohe Auflösung der kleinen Frequenzschritte bei der Abtastung können damit für jede Empfangseinheit die jeweils ungestörtesten Frequenzen ausgewählt und der jeweiligen Empfangseinheit zugewiesen werden.Due to the high resolution of the small frequency steps when scanning thus the most undisturbed frequencies selected for each receiving unit and assigned to the respective receiving unit.
Bei einer bevorzugten Ausführungsform der vorliegenden Erfindung liegen die Frequenzen dabei nicht auf einem vorher festgelegten Kanalraster, sondern können individuell eingestellt werden.In a preferred embodiment of the present invention, the Frequencies not on a previously defined channel grid, but can be set individually.
Dies ist schematisch in Fig. 4 gezeigt. Dort sind vier Kanäle I', II', III' und IV' gezeigt, deren Frequenzen gegenüber den Kanälen I, II, III und IV in Fig. 3 so verschoben sind, daß sie an die Lücken des in Fig.3 grau gezeigten Störbereichs angepaßt sind.This is shown schematically in FIG. 4. There are four channels I ', II', III 'and IV' shown, whose frequencies compared to channels I, II, III and IV in Fig. 3 so are shifted to the gaps of the interference area shown in gray in FIG are adjusted.
Durch ein solches dynamisches Kanalfrequenzraster wird die Ausnutzung der durch die Störung verbleibenden Kanalkapazitäten optimal ausgenutzt. With such a dynamic channel frequency grid, the utilization of the optimal use of remaining channel capacity due to the disruption.
Treten während des Betriebes Störungen auf, z.B. durch das Einschalten eines drahtlosen Kopfhörers in der Nachbarschaft, hat der Benutzer die Möglichkeit den Kanalwahlvorgang selbst neu zu starten.If malfunctions occur during operation, e.g. by turning on a wireless headphones in the neighborhood, the user has the option of To restart the channel selection process yourself.
Durch die erfindungsgemäßen Maßnahmen kann in einem in Fig. 1 gezeigten
Audiosystem jedem Lautsprecher 3, 4, 5, ..., 8 eine individuell optimierte
Kanalbelegung zugewiesen werden. Dies ist insbesondere für den in Fig. 1
gezeigten Fall zweier verschiedener Störer 1, 2 interessant. Aufgrund der
unterschiedlichen Abstandsverhältnisse wirken sich diese Störer unterschiedlich
auf die jeweiligen Lautsprecher aus. Jeder Lautsprecher hat also sein eigenes,
individuelles Störmuster, wie es beispielhaft für einen Lautsprecher in Fig. 3
gezeigt ist. Durch die erfindungsgemäßen Maßnahmen kann nun individuell für
jeden einzelnen Lautsprecher eine entsprechende Überprüfung und dynamische
Kanalanpassung durchgeführt werden, welche das für den einzelnen Lautsprecher
gegebene Störmuster individuell optimiert kompensieren. By means of the measures according to the invention, one can be shown in FIG
Audio system each
- 11
- erste Zentraleinheitfirst central unit
- 22
- zweite Zentraleinheitsecond central unit
- 3, ..., 83, ..., 8
- Lautsprecherspeaker
- 11, 21,..., 8111, 21, ..., 81
- integrierte Steuerungenintegrated controls
- 32, 42,..., 8232, 42, ..., 82
- einkanalige Audiosignalempfängersingle-channel audio signal receiver
- 33, 43,..., 8333, 43, ..., 83
- bidirektionale Datenfunkübertragungseinheitenbidirectional radio data transmission units
Claims (4)
dadurch gekennzeichnet, daß
die Frequenzen nicht auf einem vorher festgelegten Kanalraster liegen, sondern individuell eingestellt werden. Method according to claim 1,
characterized in that
the frequencies are not on a previously defined channel grid, but are set individually.
dadurch gekennzeichnet, daß
der Kanalwahlvorgang zu Beginn der Übertragung durchgeführt wird.Method according to claim 1 or 2,
characterized in that
the channel selection process is carried out at the start of the transmission.
dadurch gekennzeichnet, daß
der Kanalwahlvorgang nach Auftreten eines Störsignals neu gestartet wird.Method according to claim 1 or 2,
characterized in that
the channel selection process is restarted after an interference signal occurs.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10137404 | 2001-07-31 | ||
| DE2001137404 DE10137404C2 (en) | 2001-07-31 | 2001-07-31 | Method for operating a wireless audio system with dynamic channel selection |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1282336A2 true EP1282336A2 (en) | 2003-02-05 |
| EP1282336A3 EP1282336A3 (en) | 2005-01-05 |
| EP1282336B1 EP1282336B1 (en) | 2007-01-10 |
Family
ID=7693799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20020016679 Expired - Lifetime EP1282336B1 (en) | 2001-07-31 | 2002-07-26 | Method of operating a wireless audio system with dynamic channel assignment |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1282336B1 (en) |
| DE (2) | DE10137404C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2992704A4 (en) * | 2013-03-15 | 2016-11-02 | Christopher John Regan | Systems and methods for deploying, controlling, and managing wireless communication equipment |
| US9992734B2 (en) | 2013-03-15 | 2018-06-05 | Rf Venue, Inc. | Systems and methods for deploying, controlling, and managing wireless communication equipment |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007036735A (en) * | 2005-07-27 | 2007-02-08 | Sony Corp | Wireless voice transmission system, voice receiver, video camera, and audio mixer |
| DE102005054258B4 (en) * | 2005-11-11 | 2015-10-22 | Sennheiser Electronic Gmbh & Co. Kg | A method of assigning a frequency for wireless audio communication |
| CN112217586B (en) * | 2019-07-12 | 2024-02-02 | 全球能源互联网研究院有限公司 | Stepping broadband spectrum cognition method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5568480A (en) * | 1992-10-21 | 1996-10-22 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig | Method of determining a free channel in FDM radiocommunication systems |
| EP0866628A2 (en) * | 1997-03-19 | 1998-09-23 | AT&T Corp. | System and method for dynamic channel assignment |
| US5963848A (en) * | 1996-04-24 | 1999-10-05 | Motorola, Inc. | Method and apparatus for assigning a channel to a mobile unit in a wireless communication system |
| EP1075157A1 (en) * | 1999-02-16 | 2001-02-07 | Ntt Mobile Communications Network Inc. | Radio line allocation judging method in mobile communication system and radio line controller |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19829897A1 (en) * | 1998-07-06 | 2000-01-13 | Grundig Ag | Device for reproducing audio signals |
| WO2001013565A1 (en) * | 1999-08-16 | 2001-02-22 | Roke Manor Research Limited | Method of estimating inter-cell interference in a telecommunications system |
-
2001
- 2001-07-31 DE DE2001137404 patent/DE10137404C2/en not_active Expired - Fee Related
-
2002
- 2002-07-26 EP EP20020016679 patent/EP1282336B1/en not_active Expired - Lifetime
- 2002-07-26 DE DE50209216T patent/DE50209216D1/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5568480A (en) * | 1992-10-21 | 1996-10-22 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig | Method of determining a free channel in FDM radiocommunication systems |
| US5963848A (en) * | 1996-04-24 | 1999-10-05 | Motorola, Inc. | Method and apparatus for assigning a channel to a mobile unit in a wireless communication system |
| EP0866628A2 (en) * | 1997-03-19 | 1998-09-23 | AT&T Corp. | System and method for dynamic channel assignment |
| EP1075157A1 (en) * | 1999-02-16 | 2001-02-07 | Ntt Mobile Communications Network Inc. | Radio line allocation judging method in mobile communication system and radio line controller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2992704A4 (en) * | 2013-03-15 | 2016-11-02 | Christopher John Regan | Systems and methods for deploying, controlling, and managing wireless communication equipment |
| US9992734B2 (en) | 2013-03-15 | 2018-06-05 | Rf Venue, Inc. | Systems and methods for deploying, controlling, and managing wireless communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50209216D1 (en) | 2007-02-22 |
| EP1282336A3 (en) | 2005-01-05 |
| DE10137404A1 (en) | 2002-01-03 |
| EP1282336B1 (en) | 2007-01-10 |
| DE10137404C2 (en) | 2003-09-25 |
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