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WO1997040595A1 - Digital information transmission process - Google Patents

Digital information transmission process Download PDF

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Publication number
WO1997040595A1
WO1997040595A1 PCT/DE1997/000345 DE9700345W WO9740595A1 WO 1997040595 A1 WO1997040595 A1 WO 1997040595A1 DE 9700345 W DE9700345 W DE 9700345W WO 9740595 A1 WO9740595 A1 WO 9740595A1
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WO
WIPO (PCT)
Prior art keywords
transmission units
sub
information
areas
transmitted
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.)
Ceased
Application number
PCT/DE1997/000345
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German (de)
French (fr)
Inventor
Thomas Lauterbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AU22863/97A priority Critical patent/AU2286397A/en
Publication of WO1997040595A1 publication Critical patent/WO1997040595A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
    • 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
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/26—Arrangements for switching distribution 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
    • H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]

Definitions

  • the invention is based on a method for the digital transmission of information, in particular radio and / or television programs, within an area according to the type of the main claim.
  • a further reduction in the interruptions in reception is possible in accordance with claim 3 in that the receiver is informed via a separate information channel to what extent the transmission units of neighboring sub-regions match with one another.
  • a further simplification results from the assumption according to claim 2 that identically constructed transmission units are transmitted in neighboring sub-areas.
  • a simple way of synchronizing the transmitters of a subarea results from feeding the transmitters via a common data stream, whereby
  • Synchronization deviations can be compensated for by delaying the transmission process in individual transmitters.
  • FIG. 1 shows schematically the basic situation on which the method according to the invention is based and
  • FIG. 2 shows the structure of two transmission units transmitted in neighboring sub-regions. description
  • FIG. 1 the underlying situation is shown schematically, in which two adjacent sub-areas 1 and 2 are supplied via a transmitter 3 and 4 assigned to each sub-area. It is also conceivable that a sub-area is covered by several transmitters in single-wave operation. Each sub-area is an individual transmission frequency and an individual structure of the
  • a mobile receiver 10 moves along a line 11, e.g. B. a road, and crosses the border 12 between the two sub-areas 1 and 2 several times.
  • the receiver must be switched to the new reception frequency when changing to a new area. Another delay arises from the need to synchronize the receiver to the transmission units. In addition, the
  • Transmission units of neighboring sub-areas match at least in the parts that contain the same information.
  • An evaluation of the information transmitted in the so-called Fast Information Channel (FIC) regarding the structure of the transmission units or the position of the received information within the transmission unit and the delays associated therewith can be dispensed with. This applies in particular to the special case that the transmission units transmitted in neighboring sub-areas have the same structure.
  • FIC Fast Information Channel
  • the transmission units of neighboring sub-areas only match in certain parts, but which are not the same for the transmission units of all sub-areas, it makes sense to inform the receiver, for example via the FIC, in which parts the transmission units match. If the recipient knows from the FIC that the
  • the receiver can change the sub-area, e.g. B. switch to the other frequency during the zero symbol, without having to then carry out the steps for resynchronization and for evaluating the structure of the transmission unit.
  • FIG. 2 shows schematically the structure of two transmission units 40 and 41 according to the DAB specification.
  • Blocks 20 represent the zero symbol and 21 the reference symbol, which are used, among other things, to synchronize the receiver.
  • the block identified by 22 is the so-called Fast Information Channel (FIC), while blocks 23 to 32 represent the different information, radio or television programs.
  • FIC Fast Information Channel
  • blocks 23 to 32 represent the different information, radio or television programs.
  • the same reference numerals mean that the same information is transmitted in the two transmission units, which are additionally identified in FIG. 2 by the same hatching.
  • the ensembles transmitted in neighboring sub-regions are synchronized with one another, which can be seen, for example, from the temporal correspondence of the zero and reference symbols between the two transmission units 40 and 41 shown.
  • the information blocks 23, 25, 28 which contain the same information are in the same position within the transmission units.
  • a synchronization of the transmitters assigned to the sub-areas is possible in a simple manner in that the transmitters are supplied with the information to be transmitted via a common data stream. It is important to ensure that the delay times for all transmitters are approximately the same. As indicated in FIG. 1, this is possible, for example, by transmitting the information to the transmitters via a satellite 5. However, it can also be provided, for example, via the
  • Satellite 5 to transmit only a synchronization signal to the transmitter.
  • Synchronization deviations between the transmission units of neighboring sub-areas can occur can be compensated in a simple manner in that the transmission units are transmitted with a delay in individual subregions.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A digital transmission process is disclosed for transmitting information, in particular radio and/or television broadcasts, within a region. Information in different partial areas is transmitted in transmission units with different frequencies. By synchronising the transmission units of adjacent partial areas and matching the transmission units in the parts which contain the same information, it is possible to reduce the interruptions in the reception of information caused when a mobile receiver moves from one partial area to another partial area.

Description

Verfahren zur digitalen Übertragung von InformationenProcess for the digital transmission of information

Stand der TechnikState of the art

Die Erfindung geht von einem Verfahren zur digitalen Übertragung von Informationen, insbesondere von Rundfunk- und/oder Fernsehprogrammen, innerhalb eines Gebietes nach der Gattung des Hauptanspruchs aus.The invention is based on a method for the digital transmission of information, in particular radio and / or television programs, within an area according to the type of the main claim.

Aus der Broschüre „The Eureka 147 Project, digital audio broadcasting system" ist es bekannt, Informationen in Übertragungseinheiten, sog. „Ensembles" digital zu übertragen. Dabei werden Teilgebiete eines zu versorgenden Gebietes durch eine Mehrzahl von Sendern im Gleichwellenbetrieb abgedeckt, so daß an beliebigen Orten innerhalb der Teilgebiete identische Übertragungseinheiten und damit identische Informationen empfangbar sind. Um regional unterschiedliche Informationen übertragen zu können, werden in verschiedenen Teilgebieten unterschiedliche Ensembles auf unterschiedlichen Frequenzen übertragen. Beim Übergang eines Empfängers von einem Teilgebiet in ein anderes, kommt es beim Umschalten des Empfängers zwischen den Ensembles der beiden Teilgebiete zu störenden Empfangsunterbrechungen auch dann, wenn ein überregionales den beiden Ensembles gemeinsames Programm empfangen wird. Vorteile der ErfindungFrom the brochure "The Eureka 147 Project, digital audio broadcasting system" it is known to digitally transmit information in transmission units, so-called "ensembles". Sub-areas of an area to be supplied are covered by a plurality of transmitters in synchronous operation, so that identical transmission units and thus identical information can be received at any location within the sub-areas. In order to be able to transmit regionally different information, different ensembles are transmitted on different frequencies in different sub-areas. When a receiver moves from one sub-area to another, there are disruptive interruptions in reception when switching the receiver between the ensembles of the two sub-areas, even if a national program shared by the two ensembles is received. Advantages of the invention

Das erfindungsgemäße Verfahren mit den Merkmalen des Hauptanspruchs ermöglicht eine Reduzierung derThe inventive method with the features of the main claim enables a reduction in

Empfangsunterbrechungen beim Übergang eines Empfängers von einem Teilgebiet in ein anderes für den Fall, daß solche Informationen empfangen werden, die in den Übertragungseinheiten beider Teilgebiete enthalten sind. Eine weitere Reduzierung der Empfangsunterbrechungen ist gemäß Anspruch 3 dadurch möglich, daß dem Empfänger über einen separaten Informationskanal mitgeteilt wird, in wie weit die Übertragungseinheiten benachbarter Teilgebiete miteinander übereinstimmen. Eine weitere Vereinfachung ergibt sich durch die Annahme entsprechend Anspruch 2, daß in benachbarten Teilgebieten identisch aufgebaute Übertragungseinheiten übertragen werden. Eine einfache Möglichkeit zur Synchronisierung der Sender eines Teilgebietes ergibt sich durch die Speisung der Sender über einen gemeinsamen Datenstrom, wobeiInterruptions in reception when a receiver moves from one sub-area to another in the event that information is received that is contained in the transmission units of both sub-areas. A further reduction in the interruptions in reception is possible in accordance with claim 3 in that the receiver is informed via a separate information channel to what extent the transmission units of neighboring sub-regions match with one another. A further simplification results from the assumption according to claim 2 that identically constructed transmission units are transmitted in neighboring sub-areas. A simple way of synchronizing the transmitters of a subarea results from feeding the transmitters via a common data stream, whereby

Synchronisationsabweichungen durch Verzögerung des Sendevorgangs in einzelnen Sendern ausgeglichen werden können.Synchronization deviations can be compensated for by delaying the transmission process in individual transmitters.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert . Es zeigen Figur 1 schematisch die dem erfindungsgemäßen Verfahren zugrundeliegende Grundsituation und Figur 2 den Aufbau zweier in benachbarten Teilgebieten übertragener Übertragungseinheiten. BeschreibungEmbodiments of the invention are shown in the drawing and explained in more detail in the following description. FIG. 1 shows schematically the basic situation on which the method according to the invention is based and FIG. 2 shows the structure of two transmission units transmitted in neighboring sub-regions. description

Das erfindungsgemäße Verfahren wird im folgenden am Beispiel von DAB (Digital Audio Broadcasting) beschrieben, ist jedoch prinzipiell auch für andere digitale Übertragungsverfahren geeignet.The method according to the invention is described below using the example of DAB (Digital Audio Broadcasting), but is in principle also suitable for other digital transmission methods.

In Figur 1 ist schematisch die zugrundegelegte Situation dargestellt, bei der zwei einander benachbarte Teilgebiete 1 und 2 jeweils über einen jedem Teilgebiet zugeordneten Sender 3 und 4 versorgt werden. Es ist auch vorstellbar, daß ein Teilgebiet im Gleichwellenbetrieb durch mehrere Sender abgedeckt wird. Jedem Teilgebiet ist dabei eine individuelle Ubertragungsfrequenz und ein individueller Aufbau derIn Figure 1, the underlying situation is shown schematically, in which two adjacent sub-areas 1 and 2 are supplied via a transmitter 3 and 4 assigned to each sub-area. It is also conceivable that a sub-area is covered by several transmitters in single-wave operation. Each sub-area is an individual transmission frequency and an individual structure of the

Übertragungseinheiten, in denen die Informationen übertragen werden, zugeordnet. Ein mobiler Empfänger 10 bewegt sich entlang einer Linie 11, z. B. einer Straße, und kreuzt dabei mehrfach die Grenze 12 zwischen den beiden Teilgebieten 1 und 2.Assigned transmission units in which the information is transmitted. A mobile receiver 10 moves along a line 11, e.g. B. a road, and crosses the border 12 between the two sub-areas 1 and 2 several times.

Bei jedem Übergang von einem Teilgebiet in ein anderes Teilgebiet wird der Empfang der Informationen unterbrochen, wobei sich die Gesamtdauer der Unterbrechungen bei der Übertragung nach dem Stand der Technik aus folgendenWith each transition from one sub-area to another sub-area, the reception of the information is interrupted, the total duration of the interruptions in the transmission according to the prior art being as follows

Faktoren ergibt. Zunächst muß der Empfänger beim Wechsel in ein neues Teilgebiet auf die neue Empfangsfrequenz umgeschaltet werden. Eine weitere Verzögerung ergibt sich aus der Notwendigkeit, den Empfänger auf die Übertragungseinheiten zu synchronisieren. Zudem muß derFactors. First, the receiver must be switched to the new reception frequency when changing to a new area. Another delay arises from the need to synchronize the receiver to the transmission units. In addition, the

Aufbau der Übertragungseinheiten bzw. die Lage des gewünschten Programms innerhalb der Übertragungseinheit erfaßt werden. Schließlich ergibt sich im Falle von DAB noch eine systembedingte Verzögerung aufgrund der Zeitverwürfelung von Daten. Erfindungsgemäß wird nun vorgeschlagen, dieStructure of the transmission units or the location of the desired program within the transmission unit. Finally, in the case of DAB, there is a system-related delay due to the time scrambling of data. According to the invention it is now proposed that

Übertragungseinheiten benachbarter Teilgebiete untereinander zu synchronisieren. Damit entfällt für den Empfänger die Notwendigkeit der Neusynchronisierung auf dieSynchronize transmission units of neighboring sub-areas with each other. This eliminates the need for the resynchronization to the receiver

Übertragungseinheiten beim Wechsel in ein neues Teilgebiet. Des weiteren ist es vorgesehen, daß dieTransmission units when changing to a new area. Furthermore, it is provided that the

Übertragungseinheiten benachbarter Teilgebiete zumindest in den Teilen übereinstimmen, die gleiche Informationen enthalten. Damit wird eine Auswertung der im sogenannten Fast Information Channel (FIC) übertragenen Informationen betreffend den Aufbau der Übertragungseinheiten bzw. die Position der empfangenen Information innerhalb der Übertragungseinheit und die damit verbundenen Verzögerungen entbehrlich. Dies gilt insbesondere für den Spezialfall, daß die in benachbarten Teilgebieten übertragenen Übertragungseinheiten in ihrem Aufbau übereinstimmen.Transmission units of neighboring sub-areas match at least in the parts that contain the same information. An evaluation of the information transmitted in the so-called Fast Information Channel (FIC) regarding the structure of the transmission units or the position of the received information within the transmission unit and the delays associated therewith can be dispensed with. This applies in particular to the special case that the transmission units transmitted in neighboring sub-areas have the same structure.

Für den Fall, daß die Übertragungseinheiten benachbarter Teilgebiete nur in bestimmten Teilen übereinstimmen, die aber nicht bei den Übertragungseinheiten aller Teilgebiete gleich sind, ist es sinnvoll, dem Empfänger beispielsweise über den FIC mitzuteilen, in welchen Teilen die Übertragungseinheiten übereinstimmen. Wenn nämlich dem Empfänger aus dem FIC bekannt ist, daß dieIn the event that the transmission units of neighboring sub-areas only match in certain parts, but which are not the same for the transmission units of all sub-areas, it makes sense to inform the receiver, for example via the FIC, in which parts the transmission units match. If the recipient knows from the FIC that the

Übertragungseinheiten der interessierenden benachbarten Teilgebiete hinsichtlich eines gerade empfangenen Programms übereinstimmen, kann der Empfänger beim Wechsel des Teilgebietes z. B. während des Nullsymbols auf die andere Frequenz umschalten, ohne anschließend die Schritte zur Neusynchronisation und zur Auswertung des Aufbaus der Übertragungseinheit durchführen zu müssen.If the transmission units of the neighboring sub-areas of interest match with regard to a program that has just been received, the receiver can change the sub-area, e.g. B. switch to the other frequency during the zero symbol, without having to then carry out the steps for resynchronization and for evaluating the structure of the transmission unit.

Figur 2 zeigt schematisch den Aufbau zweier Übertragungseinheiten 40 und 41 gemäß der DAB-Spezifikation. Dabei stellen die Blöcke 20 das Null- und 21 das Referenzsymbol dar, die u. a. zur Synchronisierung des Empfängers dienen. Bei dem mit 22 gekennzeichneten Block handelt es sich um den sogenannten Fast Information Channel (FIC) , während die Blöcke 23 bis 32 die unterschiedlichen Informationen, Radio- oder Fernsehprogramme darstellen. Gleiche Bezugszeichen bedeuten dabei, daß in den beiden Übertragungseinheiten gleiche Informationen übertragen werden, die in Figur 2 zusätzlich jeweils durch eine gleiche Schraffur gekennzeichnet sind.Figure 2 shows schematically the structure of two transmission units 40 and 41 according to the DAB specification. Blocks 20 represent the zero symbol and 21 the reference symbol, which are used, among other things, to synchronize the receiver. The block identified by 22 is the so-called Fast Information Channel (FIC), while blocks 23 to 32 represent the different information, radio or television programs. The same reference numerals mean that the same information is transmitted in the two transmission units, which are additionally identified in FIG. 2 by the same hatching.

Wie Figur 2 weiterhin zu entnehmen ist, sind die in benachbarten Teilgebieten übertragenen Ensembles untereinander synchronisiert, was beispielsweise der zeitlichen Übereinstimmung des Null- und des Referenzsymbols zwischen den beiden dargestellten Übertragungseinheiten 40 und 41 zu entnehmen ist. Darüber hinaus ist zu erkennen, daß die Informationsblöcke 23,25,28, die gleiche Informationen enthalten, an der gleichen Position innerhalb der Übertragungseinheiten stehen.As can also be seen in FIG. 2, the ensembles transmitted in neighboring sub-regions are synchronized with one another, which can be seen, for example, from the temporal correspondence of the zero and reference symbols between the two transmission units 40 and 41 shown. In addition, it can be seen that the information blocks 23, 25, 28 which contain the same information are in the same position within the transmission units.

Eine Synchronisierung der den Teilgebieten zugeordneten Sender ist auf einfache Weise dadurch möglich, daß den Sendern die zu übertragenden Informationen über einen gemeinsamen Datenstrom zugeführt werden. Dabei ist darauf zu achten, daß die Verzögerungszeiten zu allen Sendern hin ungefähr gleich sind. Wie in Figur 1 angedeutet ist dies beispielsweise dadurch möglich, daß die Informationen den Sendern über einen Satelliten 5 zugespielt werden. Es kann aber beispielsweise auch vorgesehen sein, über denA synchronization of the transmitters assigned to the sub-areas is possible in a simple manner in that the transmitters are supplied with the information to be transmitted via a common data stream. It is important to ensure that the delay times for all transmitters are approximately the same. As indicated in FIG. 1, this is possible, for example, by transmitting the information to the transmitters via a satellite 5. However, it can also be provided, for example, via the

Satelliten 5 lediglich ein Synchronisierungssignal an die Sender zu übertragen.Satellite 5 to transmit only a synchronization signal to the transmitter.

Synchronisationsabweichungen zwischen den Übertragungseinheiten benachbarter Teilgebiete können auf einfache Weise dadurch ausgeglichen werden, daß die Übertragungseinheiten in einzelnen Teilgebieten verzögert übertragen werden. Synchronization deviations between the transmission units of neighboring sub-areas can occur can be compensated in a simple manner in that the transmission units are transmitted with a delay in individual subregions.

Claims

Ansprüche Expectations 1. Verfahren zur digitalen Übertragung von Informationen, insbesondere von Rundfunk- und/oder Fernsehprogrammen, innerhalb eines Gebiets, wobei die Informationen in verschiedenen Teilgebieten auf unterschiedlichen Frequenzen übertragen werden und die Informationen in Übertragungseinheiten übertragen werden, dadurch gekennzeichnet, daß die in benachbarten Teilgebieten übertragenen Übertragungseinheiten untereinander synchronisiert werden, und daß der Aufbau der in benachbarten Teilgebieten übertragenen Übertragungseinheiten in den Teilen übereinstimmt, die gleiche Informationen enthalten.1. A method for the digital transmission of information, in particular radio and / or television programs, within an area, the information being transmitted in different sub-regions on different frequencies and the information being transmitted in transmission units, characterized in that the transmitted in neighboring sub-regions Transmission units are synchronized with each other, and that the structure of the transmission units transmitted in neighboring sub-areas matches in the parts that contain the same information. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Aufbau der in benachbarten Teilgebieten übertragenen Übertragungseinheiten übereinstimmt.2. The method according to claim 1, characterized in that the structure of the transmission units transmitted in neighboring sub-areas corresponds. 3. Verfahren nach Anspruch l oder 2, dadurch gekennzeichnet, daß Empfängern die Übereinstimmung des Aufbaus der Übertragungseinheiten benachbarter Teilgebiete über einen separaten Informationskanal mitgeteilt wird. 3. The method according to claim l or 2, characterized in that recipients are informed of the agreement of the structure of the transmission units of neighboring sub-regions via a separate information channel. 4. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Synchronisierung der in den Teilgebieten übertragenen Übertragungseinheiten durch Zuführung der zu übertragenden Informationen zu den die Teilgebiete versorgenden Sendern über einen gemeinsamen Datenstrom erreicht wird.4. The method according to claim 1 or 2, characterized in that the synchronization of the transmission units transmitted in the sub-areas is achieved by supplying the information to be transmitted to the transmitters supplying the sub-areas via a common data stream. 5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß Synchronisationsabweichungen zwischen den Übertragungseinheiten benachbarter Teilgebiete durch verzögerte Übertragung der Übertragungseinheiten in einzelnen Teilgebieten ausgeglichen werden. 5. The method according to any one of claims 1 to 3, characterized in that synchronization deviations between the transmission units of adjacent sub-areas are compensated for by delayed transmission of the transmission units in individual sub-areas.
PCT/DE1997/000345 1996-04-20 1997-02-27 Digital information transmission process Ceased WO1997040595A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22863/97A AU2286397A (en) 1996-04-20 1997-02-27 Digital information transmission process

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Application Number Priority Date Filing Date Title
DE19615843.5 1996-04-20
DE1996115843 DE19615843A1 (en) 1996-04-20 1996-04-20 Process for the digital transmission of information

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042376A1 (en) * 2004-09-02 2006-03-09 Robert Bosch Gmbh Receiving device for receiving time-division multiplexed signals, transmission system and method for temporal synchronization of time-division multiplexed signals

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994007314A1 (en) * 1992-09-15 1994-03-31 British Broadcasting Corporation Method for synchronising transmitter frequencies in common wave digital audio broadcast
GB2287384A (en) * 1994-03-11 1995-09-13 British Broadcasting Corp Digital broadcast systems for local transmissions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994007314A1 (en) * 1992-09-15 1994-03-31 British Broadcasting Corporation Method for synchronising transmitter frequencies in common wave digital audio broadcast
GB2287384A (en) * 1994-03-11 1995-09-13 British Broadcasting Corp Digital broadcast systems for local transmissions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RILEY J L: "THE DAB MULTIPLEX AND SYSTEM SUPPORT FEATURES", EBU REVIEW- TECHNICAL, no. 259, 21 March 1994 (1994-03-21), pages 11 - 23, XP000450541 *

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