EP0838108A1 - Process for transmitting messages by digital sound broadcasting and receiver for carrying out this process - Google Patents

Process for transmitting messages by digital sound broadcasting and receiver for carrying out this process

Info

Publication number
EP0838108A1
EP0838108A1 EP97922879A EP97922879A EP0838108A1 EP 0838108 A1 EP0838108 A1 EP 0838108A1 EP 97922879 A EP97922879 A EP 97922879A EP 97922879 A EP97922879 A EP 97922879A EP 0838108 A1 EP0838108 A1 EP 0838108A1
Authority
EP
European Patent Office
Prior art keywords
digital
traffic
data
announcements
tmc
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
EP97922879A
Other languages
German (de)
French (fr)
Inventor
Ulrich Kersken
Karin Hempel
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
Priority claimed from DE19630195A external-priority patent/DE19630195A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0838108A1 publication Critical patent/EP0838108A1/en
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
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/55—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/37—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying segments of broadcast information, e.g. scenes or extracting programme ID
    • 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 relates to a method for transmitting announcements of the traffic warning service using digital audio broadcasting (DAB) and a receiver for receiving and for selective reproduction of announcements.
  • DAB digital audio broadcasting
  • Traffic announcements for road users currently consist of spoken messages, which are broadcast by analogue transmitters.
  • RDS Radio Data System
  • TMC Traffic Message Channel
  • the structure and coding of the digital traffic reports are specified in CEN Draft pr.ENV / 278/4/1/0011, which is based on the proposed standard Alert C, November 1990, published by the RDS ATT Alert Consortium.
  • the essential elements of a traffic report are the location and the event. This information is cataloged, which means that a unique code is assigned to each location and event relevant to traffic. The chaining of the locations in the location table along existing streets shows the course.
  • Traffic announcements as spoken announcements - hereinafter referred to as traffic announcements - are, in contrast to traffic announcements of the TMC system, not with regard to selectable their geographical assignment.
  • DAB digital audio broadcasting
  • Decoder for TMC messages included.
  • digital radio can only output the traffic reports integrated in the radio program, which, however, as in the analog method, can neither be selected nor managed in any way.
  • the method according to the invention with the characterizing features of the main claim has the advantage, that the digital transmission of radio allows easy assignment to the data of the digital traffic warning system. Another advantage is that the transmission of TMC data via digital radio is much better, since reception difficulties are less with the digital method. This is particularly useful in areas with multi-path reception (mountains, high-rise buildings in a large city) and / or in areas that are supplied by transmitters that also broadcast ARI.
  • the data of the traffic announcement are not transmitted by the actual radio program, but audio segments transmitted separately are used. This makes it possible to transmit announcements in different languages and thus enable selection in the receiving device in the correct language.
  • An advantageous exemplary embodiment for a receiver which makes it possible to receive announcements using the method according to the invention includes a DAB decoder, as well as a TMC decoder and an associated management.
  • FIG. 1 shows the basic structure of digital broadcasting.
  • 2 shows the structure of a FIB (Fast Information Block)
  • FIG. 3 shows the identification of the starting point of a parallel transmission
  • FIG. 4 shows a multimedia object
  • Audio segment and Figure 5 is a block diagram of the receiver and Figure 6 is an example of an object set in the memory of the receiver.
  • the inventive method is used to TMC messages, traffic announcements and other optional information such.
  • DAB Digital radio
  • a DAB ensemble is broadcast by a DAB station. 1, such an ensemble is identified with the term “north” in level A.
  • An individual program for example a radio program, is referred to as a service, see level B.
  • services such as NDR1 and FFN are mentioned.
  • a service can have several components, called service components, for example audio, data, video components, etc.
  • TMC Transmission Control Channel
  • FIC Fast Information Channel
  • MSC Main Service Channel MSC Main Service Channel
  • the area of the Fast Information Channel relevant for digital traffic radio is divided into several Fast Information Blocks (FIB).
  • the FIBs are divided into several data types and extensions.
  • a Fast Information Block is shown in Figure 2 on level E.
  • the actual data field comprises 30 bytes, while the control field CRC (Cyclic Redundancy Check) comprises 2 bytes as an error protection code.
  • the actual data field has several extensions at level F.
  • a special extension is made up of a header and the extension data, see level G. This structure from level G represents a Fast Information Data Channel (FIDC).
  • FIDC Fast Information Data Channel
  • the Fast Information Data Channel corresponds to data type 5.
  • the header of the FIDC contains Type 5, the length information the Extensions in Length, an Rfu 0 (reserved for future), Tcld (Type Component Identifier) and Ext 1 as the first extension of the FIB.
  • the actual information takes place in the Extension Data areas, whereby up to six TMC groups can be transmitted.
  • the groups contain a 37-bit coded traffic message. If an FIB is not used completely by extensions, the last extension is followed by a data end marker, the remaining length is filled with padding bytes.
  • a multimedia object see FIG. 3, consists of a mandatory header with a length of 10 bytes, as well as an optional header with variable length and the object body that contains the actual data.
  • the linking of TMC messages in the Fast Information Channel and traffic announcements in the audio stream is carried out with special media objects, the link objects.
  • these objects refer to a part of the audio stream that contains the traffic announcement (mandatory header and body), on the other hand, it contains the reference to the TMC message (optional header). It does not refer to the Fast Information Data Channel, but to the
  • the Service component of level C from which the TMC message comes.
  • the uniqueness is ensured due to the parallelism of the transmission and the connection to the service.
  • the start and end of the traffic announcement is signaled in the transmitter by pressing the button of the speaker or technician.
  • the corresponding TMC message is transmitted once in the Fast Information Data Channel.
  • a link object is generated by referring to the starting point of the audio stream, ie to the start of a traffic announcement, and establishing the connection to the TMC message.
  • a further header is generated in one of the following data frames, which indicates the end point of the audio stream.
  • the marked part of the audio stream is stored in the receiver together with the associated TMC message and is used in other applications such as. B. a selection available.
  • the digital radio data frame in which the multimedia object is transmitted, only one TMC message may be transmitted in the Fast Information Channel.
  • the TMC messages in other data frames are irrelevant, even if the audio stream has not yet ended, since these are not referred to by the link object. It is just the linking of an audio stream with the TMC messages allowed since the synchronization can only be carried out from one program.
  • several services can access the same service component, but only one service can determine the content of the service component.
  • Another advantageous embodiment selects a different structure of the link object.
  • the TMC message is no longer transmitted via the FIC channel, but the optional header of the link object contains the TMC message itself.
  • the audio stream is marked as described in FIG. 3 and above.
  • the corresponding TMC message is entered in the optional header of the link object.
  • the link object points to the starting point of the audio stream, i.e. H. referred to the start of a traffic announcement.
  • a further header is generated in the data frame, which indicates the end point of the audio stream.
  • the marked parts of the audio stream are stored in the receiver together with the associated TMC message and are available for further applications.
  • each program can provide its own, individual traffic announcements that can be selected.
  • the parallel audio stream that is to say the radio program, is not used to transmit the traffic announcements, but the statements are assigned to a separately transmitted audio segment. It is advantageous if an audio segment corresponds to a traffic announcement.
  • the program makes the traffic announcements available as audio segments and as TMC messages. According to FIG. 4, the TMC messages are transmitted in the optional header of the multimedia object. The audio segment is set in the Object Body area. Optionally, it is also possible to transmit the TMC message in the object body and the audio segment in the optional header.
  • a further development of this method consists in transmitting several audio segments, video segments and text labels in the optional header. This makes it possible to make the traffic announcements visible in different languages, as well as a graphic representation of the traffic disruption on a road map and a text representation of the message directly in the recipient.
  • a receiving segment operating according to the method according to the invention is shown in FIG. 5.
  • the radio programs, the TMC messages and other data are transmitted from the transmitter 1 via digital radio.
  • audio and video signals of the current programs are decoded, generated and fed to the playback unit 8.
  • the multimedia objects and the data channels are decoded.
  • the TMC messages are fed to the TMC decoder 3, the audio, video segments and text inputs are fed to the management 4.
  • the TMC decoder decrypts the TMC messages and also forwards them to management 4.
  • Management 4 the objects coming from the DAB decoder are managed using the TMC messages.
  • the correct assignment of the objects to one another, as well as the storage in the memory 5, and the updating and possibly deletion of the objects stored in the memory 5 is controlled by the management.
  • the user can enter selection criteria, for example highway numbers, via an input device 7. These entries are compared with the information contained in the TMC messages at 6 and output if necessary.
  • FIG. 6 shows a possible arrangement of a TMC message for an object set which contains various audio segments, video segments and text messages. These messages can also be selected using the selection.

Abstract

A process for transmitting traffic messages over digital radio DAB by using the TMC code makes it possible to allocate easily the audio signals to the TMC data. The allocation is given by the data frames of the digital sender and by the corresponding data protocol.

Description

VERFAHREN ZUR ÜBERTRAGUNG VON DURCHSAGEN MITTELS DIGITALER HÖRFUNKSENDUNGEN UND EMPFÄNGER ZUR DURCHFÜHRUNG DES VERFAHRENSMETHOD FOR THE TRANSMISSION OF ANNOUNCEMENTS BY DIGITAL S O RFUNKSENDUNGEN AND RECEIVER FOR IMPLEMENTING THE PROCESS
Stand der TechnikState of the art
Die Erfindung betrifft ein Verfahren zur Übertragung von Durchsagen des Verkehrswarndienstes unter Verwendung des Digital Audio Broadcasting (DAB) und einen Empfänger zum Empfang und zur selektiven Wiedergabe von Durchsagen.The invention relates to a method for transmitting announcements of the traffic warning service using digital audio broadcasting (DAB) and a receiver for receiving and for selective reproduction of announcements.
Verkehrdurchsagen für Verkehrsteilnehmer bestehen im Moment aus gesprochenen Meldungen, die von analogen Sendern ausgestrahlt werden. Eine Weiterentwicklung stellt der digitale Verkehrswarndienst Radio-Daten-System (RDS) mit Traffic Message Channel (TMC) dar. Der Aufbau und die Codierung der digitalen Verkehrsmeldungen sind in CEN Draft pr.ENV/278/4/1/0011 festgelegt, der auf dem Normvorschlag Alert C, November 1990, herausgegeben von RDS ATT Alert Consortium, basiert. Die wesentlichen Elemente einer Verkehrsmeldung sind dabei der Ort des Geschehens (location) und das Ereignis (event) . Diese Angaben sind katalogisiert, d. h. daß jedem verkehrsrelevantem Ort und jedem verkehrsrelevanten Ereignis ein eindeutiger Code zugewiesen ist. Die Verkettung der Orte in der Ortstabelle entlang existierender Straßen gibt den Verlauf wieder. Außer den üblichen Einrichtungen eines Empfangsgerätes mit einem Decoder sind zur Nutzung des Verkehrsmeldungskanals TMC Einrichtungen zur Decodierung, zur Speicherung, zur Weiterverarbeitung und zur Ausgabe der Verkehrsmeldung erforderlich. Zur Decodierung dieser digital codierten Verkehrsmeldungen ist eine Umsetzung in Sprache erforderlich. Diese ist mit erheblichem Aufwand verbunden, so daß in Ländern bzw. Sprachgebieten mit geringen Bevölkerungszahlen mit einer Einführung des TMC-Systems in absehbarer Zeit nicht zu rechnen ist. Verkehrsmeldungen als gesprochene Meldungen - im folgenden Verkehrsdurchsagen genannt - sind jedoch im Gegensatz zu Verkehrsmeldungen des TMC-Systems nicht bzgl . ihrer geografischen Zuordnung selektierbar.Traffic announcements for road users currently consist of spoken messages, which are broadcast by analogue transmitters. A further development is the digital traffic warning service Radio Data System (RDS) with Traffic Message Channel (TMC). The structure and coding of the digital traffic reports are specified in CEN Draft pr.ENV / 278/4/1/0011, which is based on the proposed standard Alert C, November 1990, published by the RDS ATT Alert Consortium. The essential elements of a traffic report are the location and the event. This information is cataloged, which means that a unique code is assigned to each location and event relevant to traffic. The chaining of the locations in the location table along existing streets shows the course. In addition to the usual facilities of a receiving device with a Decoders are required to use the TMC traffic information channel for decoding, storing, further processing and outputting the traffic information. In order to decode these digitally coded traffic reports, a conversion into speech is required. This involves considerable effort, so that the introduction of the TMC system is unlikely in the foreseeable future in countries or language areas with a small population. Traffic announcements as spoken announcements - hereinafter referred to as traffic announcements - are, in contrast to traffic announcements of the TMC system, not with regard to selectable their geographical assignment.
Gleichzeitig ist mit einer zunehmenden Einführung des digitalen Rundfunks, des Digital Audio Broadcasting (DAB) zu rechnen. Der digitale Rundfunk hat gegenüber den alten analogen Verfahren den Vorteil, daß der Empfang sehr viel verlässlicher ist und eine mit einer CD vergleichbaren Tonqualität aufweist. Die Spezifikationen des digitalenAt the same time, an increasing introduction of digital broadcasting, digital audio broadcasting (DAB) can be expected. Digital broadcasting has the advantage over the old analog methods that reception is much more reliable and has a sound quality comparable to that of a CD. The specifications of the digital
Hörfunks sind in ETS 300401, Februar 1995, festgelegt. Für die Übertragung der TMC-Meldungen ist im Protokoll des digitalen Hörfunks ein Kanal, der Fast Information Channel (FIC) vorgesehen. In den derzeitig zur Verfügung stehenden Endgeräten für den digitalen Hörfunk ist jedoch noch keinRadio broadcasts are specified in ETS 300401, February 1995. A channel, the Fast Information Channel (FIC), is provided for the transmission of the TMC messages in the protocol of digital radio. However, there is still none in the devices currently available for digital radio
Decoder für TMC-Meldungen enthalten. Somit kann zur Zeit der digitale Hörfunk nur die im Hörfunkprogramm integrierten Verkehrsmeldungen ausgeben, die aber wie im analogen Verfahren weder selektierbar noch in irgendeiner Art zu verwalten sind.Decoder for TMC messages included. Thus, at the moment, digital radio can only output the traffic reports integrated in the radio program, which, however, as in the analog method, can neither be selected nor managed in any way.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Verfahren mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die digitale Übertragung des Hörfunks eine einfache Zuordnung zu den Daten des digitalen Verkehrswarnsystems ermöglicht. Ein weiterer Vorteil ist, daß die Übertragung von TMC-Daten über digitalen Rundfunk viel besser erfolgt, da Empfangsschwierigkeiten beim digitalen Verfahren geringer sind. Das kommt besonders in Gebieten mit Mehrwegeempfang (Gebirge, Hochhäuser einer Großstadt) und/oder in Gebieten die von Sendern versorgt werden, die gleichzeitig ARI ausstrahlen, zunutze.The method according to the invention with the characterizing features of the main claim has the advantage, that the digital transmission of radio allows easy assignment to the data of the digital traffic warning system. Another advantage is that the transmission of TMC data via digital radio is much better, since reception difficulties are less with the digital method. This is particularly useful in areas with multi-path reception (mountains, high-rise buildings in a large city) and / or in areas that are supplied by transmitters that also broadcast ARI.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Verfahrens möglich. Besonders vorteilhaft ist es, die TMC-Meldungen im Datenkanal FIC und die Verkehrsdurchsagen im digitalen Radio mit der Hilfe von Datenblδcken, sogenannten Link-Objekten, zu verbinden. Die Eindeutigkeit der Zuordnung ist in diesem Fall aufgrund der Parallelität der Übertragung und der Verbindung zum Sender gesichert. Vorteilhafterweise wird nach diesem Verfahren der Beginn und das Ende einer Verkehrsdurchsage im digitalen Radio durch Knopfdruck eines Sprechers signalisiert, wobei die Signalisierung die Steuerung der TMC-Übertragung übernimmt.Advantageous further developments and improvements of the method specified in the main claim are possible through the measures listed in the subclaims. It is particularly advantageous to connect the TMC messages in the data channel FIC and the traffic announcements in digital radio with the help of data blocks, so-called link objects. The uniqueness of the assignment is ensured in this case due to the parallelism of the transmission and the connection to the transmitter. Advantageously, according to this method, the start and end of a traffic announcement is signaled in digital radio by pressing a speaker, the signaling taking over the control of the TMC transmission.
In einer weiteren vorteilhaften Ausführungsform werden die Daten der Verkehrsdurchsage nicht vom eigentlichen Hörfunkprogramm übertragen, sondern es werden seperat übertragene Audiosegmente eingesetzt. Dadurch besteht die Möglichkeit, Durchsagen in verscheidenen Sprachen zu übertragen und so eine Selektion im Empfangsgerät in der richtigen Sprache zu ermöglichen. Ein vorteilhaftes Ausführungsbeispiel für einen Empfänger, der es ermöglicht, Durchsagen nach dem erfindungsgemäßen Verfahren zu empfangen, beinhaltet einen DAB-Decoder, sowie einen TMC- Decoder und ein dazugehöriges Management. ZeichnungenIn a further advantageous embodiment, the data of the traffic announcement are not transmitted by the actual radio program, but audio segments transmitted separately are used. This makes it possible to transmit announcements in different languages and thus enable selection in the receiving device in the correct language. An advantageous exemplary embodiment for a receiver which makes it possible to receive announcements using the method according to the invention includes a DAB decoder, as well as a TMC decoder and an associated management. drawings
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigt Figur 1 die Grundstruktur des digitalen Rundfunks. Figur 2 den Aufbau eines FIBs (Fast Information Block) , Figur 3 die Kennzeichnung des Startpunktes einer parallelen Übertragung, Figur 4 ein Multimediaobjekt mitEmbodiments of the invention are shown in the drawing and explained in more detail in the following description. FIG. 1 shows the basic structure of digital broadcasting. 2 shows the structure of a FIB (Fast Information Block), FIG. 3 shows the identification of the starting point of a parallel transmission, FIG. 4 shows a multimedia object
Audiosegment und Figur 5 ein Blockschaltbild des Empfängers und Figur 6 ein Beispiel für einen Objektsatz im Speicher des Empfängers .Audio segment and Figure 5 is a block diagram of the receiver and Figure 6 is an example of an object set in the memory of the receiver.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Das erfindungsgemäße Verfahren dient dazu, TMC-Meldungen, Verkehrsdurchsagen und weitere optionale Informationen wie z. B. Straßenkarten zu Verkehrsmeldungen im digitalenThe inventive method is used to TMC messages, traffic announcements and other optional information such. B. Road maps to traffic reports in digital
Hörfunk zu übertragen. Der digitale Hörfunk (DAB) ermöglicht eine parallele Übertragung von Text, Audio- oder Videosequqenzen. Von einem DAB-Sender wird jeweils ein DAB- Ensemble ausgestrahlt. In Figur 1 wird ein solches Ensemble in der Ebene A mit dem Begriff „Nord" gekennzeichnet. Ein einzelnes Programm, z. B. ein Hörfunkprogramm wird als Service bezeichnet, siehe Ebene B. In Figur 1 sind als Services beispielsweise NDRl und FFN genannt. Ein Service kann mehrere Komponenten aufweisen, Service Components genannt, z. B. Audio-, Daten-, Videokomponenten usw. DieseBroadcast radio. Digital radio (DAB) enables parallel transmission of text, audio or video sequences. A DAB ensemble is broadcast by a DAB station. 1, such an ensemble is identified with the term “north” in level A. An individual program, for example a radio program, is referred to as a service, see level B. In FIG. 1, services such as NDR1 and FFN are mentioned. A service can have several components, called service components, for example audio, data, video components, etc. These
Komponenten sind auf Ebene C dargestellt. Eine der möglichen Komponenten ist TMC. Auf Ebene D, dem Datenrahmen des digitalen Hörfunks werden den einzelnen Servicekomponenten SubChannels zugeordnet. Die Spezifikation des digitalen Hörfunks nach ETS 300 401 schreibt für die TMC-Meldungen einen speziellen Kanal FIC (Fast Information Channel) vor. Die verschiedenen Subchannels werden unter dem Begriff MSC Main Service Channel zusammengefaßt. Dem gesamten Datenblock wird vom Sender eine Rahmenstruktur gegeben, wobei den Daten noch ein Synchronisationswort Sync vorangestellt wird.Components are shown on level C. One of the possible components is TMC. At level D, the data frame of digital radio, the individual service components are assigned to subchannels. The specification of digital radio according to ETS 300 401 writes for the TMC messages a special channel FIC (Fast Information Channel). The various subchannels are summarized under the term MSC Main Service Channel. The transmitter gives the entire data block a frame structure, the data being preceded by a synchronization word Sync.
Der für den digitalen Verkehrsfunk relevante Bereich des Fast Information Channels teilt sich in mehrere Fast Information Blocks (FIB) . Die FIBs werden in mehrere Datentypen und Extensions unterteilt. Ein Fast Information Block wird in Figur 2 auf Ebene E dargestellt. Das eigentliche Datenfeld umfaßt 30 Bytes, während das Kontrollfeld CRC (Cyclic Redundancy Check)2 Bytes als Fehlerschutzcode umfasst. Das eigentliche Datenfeld weist auf Ebene F mehrere Extensions auf. Eine spezielle Extension ist aus einem Header und den Extensiondaten, siehe Ebene G aufgebaut. Diese Struktur aus Ebene G stellt einen Fast Information Data Channel (FIDC) dar. Der Fast Information Data Channel entspricht laut vorgeschlagenem Protokoll ETS 300 401 dem Datentyp 5. Der Header des FIDC enthält nach Ebene H die Kennzeichnung des Types 5, die Information zur Länge der Extensions in Length, eine Rfu 0 (reserved for Future) , Tcld (Type Component Identifier) sowie Ext 1 als erste Extension des FIBs. Die eigentlichen Informationen erfolgen in den Extension Data Bereichen, wobei bis zu sechs TMC-Gruppen übertragen werden können. Die Gruppen enthalten eine mit 37 Bit codierte Verkehrsnachricht. Wird ein FIB nicht komplett von Extensions genutzt, so folgt der letzten Extension ein Data End Marker die restliche Länge wird mit Padding Bytes gefüllt.The area of the Fast Information Channel relevant for digital traffic radio is divided into several Fast Information Blocks (FIB). The FIBs are divided into several data types and extensions. A Fast Information Block is shown in Figure 2 on level E. The actual data field comprises 30 bytes, while the control field CRC (Cyclic Redundancy Check) comprises 2 bytes as an error protection code. The actual data field has several extensions at level F. A special extension is made up of a header and the extension data, see level G. This structure from level G represents a Fast Information Data Channel (FIDC). According to the proposed protocol ETS 300 401, the Fast Information Data Channel corresponds to data type 5. According to Level H, the header of the FIDC contains Type 5, the length information the Extensions in Length, an Rfu 0 (reserved for future), Tcld (Type Component Identifier) and Ext 1 as the first extension of the FIB. The actual information takes place in the Extension Data areas, whereby up to six TMC groups can be transmitted. The groups contain a 37-bit coded traffic message. If an FIB is not used completely by extensions, the last extension is followed by a data end marker, the remaining length is filled with padding bytes.
Die Übertragung innerhalb der vom Sender festgelegten Datenrahmenstruktur erfolgt für Daten in Packed Mode (z.B Multimediaobjekte) und für Hörfunkprogramme im Stream Mode (z.B. Durchsagen) . Ein Multimediaobjekt besteht, siehe Fig. 3, aus einem Mandatory Header mit einer Länge von 10 Bytes, sowie einem Optional Header mit variabler Länge und dem Object Body, der die eigentlichen Daten enthält. Die Verknüpfung von TMC-Meldungen im Fast Information Channel und Verkehrsdurchsagen im Audiostrom wird mit speziellen Mediaobjekten, den Link-Objekten vorgenommen. Diese Objekte verweisen einerseits auf einen Teil des Audistroms, der die Verkehrsdurchsage enthält (Mandatory Header und Body) , andererseits enthält er den Verweis auf die TMC-Meldung (Optional Header) . Es wird dabei nicht auf den Fast Information Data Channel verwiesen, sondern auf dieThe transmission within the data frame structure defined by the transmitter takes place for data in packed mode (eg multimedia objects) and for radio programs in stream mode (eg announcements). A multimedia object, see FIG. 3, consists of a mandatory header with a length of 10 bytes, as well as an optional header with variable length and the object body that contains the actual data. The linking of TMC messages in the Fast Information Channel and traffic announcements in the audio stream is carried out with special media objects, the link objects. On the one hand, these objects refer to a part of the audio stream that contains the traffic announcement (mandatory header and body), on the other hand, it contains the reference to the TMC message (optional header). It does not refer to the Fast Information Data Channel, but to the
Servicekomponente der Ebene C, aus der die TMC-Meldung kommt. Die Eindeutigkeit ist aufgrund der Parallelität der Übertragung und der Verbindung zum Service gesichert. Im Sender wird der Beginn und das Ende der Verkehrsdurchsage durch den Knopfdruck des Sprechers oder Technikers signalisiert. Bei Signalisierung des Beginns einer Verkehrsdurchsage wird die entsprechende TMC-Meldung einmal im Fast Information Data Channel übertragen. Parallel dazu, im gleichen digitalen Radio-Datenrahmen, wird ein Linkobjekt erzeugt, indem auf den Startpunkt des Audiostroms, d. h. auf den Beginn einer Verkehrsdurchsage verwiesen und die Verbindung zur TMC-Meldung hergestellt wird. Bei der Signalisierung des Endes einer Verkehrsdurchsage wird ein weiterer Header in einem der folgenden Datenrahmen erzeugt, der den Endpunkt des Audiostroms angibt. Im Empfänger wird der gekennzeichnete Teil des Audiostroms zusammen mit der zugehörigen TMC-Meldung gespeichert und steht in weiteren Anwendungen wie z. B. einer Selektion zur Verfügung. Innerhalb des digitalen Radio-Datenrahmens, indem das Multimediaobjekt übertragen wird, darf im Fast Information Channel nur eine TMC-Meldung übertragen werden. Die TMC- Meldungen in anderen Datenrahmen sind ohne Bedeutung, auch wenn der Audiostrom noch nicht beendet ist, da auf diese nicht durch das Linkobjekt verwiesen wird. Es ist nur die Verknüpfung von einem Audiostrom mit den TMC-Meldungen erlaubt, da die Synchronisierung nur von einem Programm aus vorgenommen werden kann. Üblicherweise können mehrere Services auf ein und dieselbe Servicekomponente zugreifen, aber nur ein Service kann den Inhalt der Servicekomponente bestimmen.Service component of level C, from which the TMC message comes. The uniqueness is ensured due to the parallelism of the transmission and the connection to the service. The start and end of the traffic announcement is signaled in the transmitter by pressing the button of the speaker or technician. When the beginning of a traffic announcement is signaled, the corresponding TMC message is transmitted once in the Fast Information Data Channel. In parallel, in the same digital radio data frame, a link object is generated by referring to the starting point of the audio stream, ie to the start of a traffic announcement, and establishing the connection to the TMC message. When the end of a traffic announcement is signaled, a further header is generated in one of the following data frames, which indicates the end point of the audio stream. The marked part of the audio stream is stored in the receiver together with the associated TMC message and is used in other applications such as. B. a selection available. Within the digital radio data frame, in which the multimedia object is transmitted, only one TMC message may be transmitted in the Fast Information Channel. The TMC messages in other data frames are irrelevant, even if the audio stream has not yet ended, since these are not referred to by the link object. It is just the linking of an audio stream with the TMC messages allowed since the synchronization can only be carried out from one program. Usually, several services can access the same service component, but only one service can determine the content of the service component.
Eine weitere vorteilhafte Ausführungsform wählt eine andere Struktur des Linkobjekts. Dabei wird die TMC-Meldung nicht mehr über den FIC-Kanal übertragen, sondern der Optional Header des Linkobjekts beinhaltet die TMC-Meldung selbst. Der Audiostrom wird dabei wie in Figur 3 und oben geschildert markiert. Bei Beginn einer Verkehrsdurchsage wird die entsprechende TMC-Meldung in den Optional Header des Linkobjekts eingetragen. Parallel dazu wird im Linkobjekt auf den Startpunkt des Audiostromes, d. h. auf den Beginn einer Verkehrsdurchsage verwiesen. Bei Signalisierung des Endes der Verkehrsdurchsage wird ein weiterer Header im Datenrahmen erzeugt, der den Endpunkt des Audiostroms angibt. Im Empfänger werden die gekennzeichneten Teile des Audiostroms zusammen mit der zugehörigen TMC- Meldung gespeichert und stehen weiteren Anwendungen zur Verfügung. Mit dieser Ausführungsform kann jedes Programm für eigene, individuelle Verkehrsdurchsagen sorgen, die selektiert werden können.Another advantageous embodiment selects a different structure of the link object. The TMC message is no longer transmitted via the FIC channel, but the optional header of the link object contains the TMC message itself. The audio stream is marked as described in FIG. 3 and above. At the start of a traffic announcement, the corresponding TMC message is entered in the optional header of the link object. At the same time, the link object points to the starting point of the audio stream, i.e. H. referred to the start of a traffic announcement. When the end of the traffic announcement is signaled, a further header is generated in the data frame, which indicates the end point of the audio stream. The marked parts of the audio stream are stored in the receiver together with the associated TMC message and are available for further applications. With this embodiment, each program can provide its own, individual traffic announcements that can be selected.
In einer weiteren Ausführungsform wird nicht der parallele Audiostrom, also das Hörfunkprogramm genutzt, um die Verkehrsdurchsagen zu übertragen, sondern die Aussagen werden einem seperat übertragenen Audiosegment zugeordnet. Dabei ist es vorteilhaft, wenn ein Audiosegment einer Verkehrsdurchsage entspricht. Vom Programm werden die Verkehrsdurchsagen als Audiosegmente und als TMC-Meldungen zur Verfügung gestellt. Die TMC-Meldungen werden nach Figur 4 im Optional Header des Multimediaobjektes übertragen. Im Bereich Object Body wird das Audiosegment eingestellt. Optional ist es auch möglich, die TMC-Meldung im Object Body und das Audiosegment im Optional Header zu übertragen.In a further embodiment, the parallel audio stream, that is to say the radio program, is not used to transmit the traffic announcements, but the statements are assigned to a separately transmitted audio segment. It is advantageous if an audio segment corresponds to a traffic announcement. The program makes the traffic announcements available as audio segments and as TMC messages. According to FIG. 4, the TMC messages are transmitted in the optional header of the multimedia object. The audio segment is set in the Object Body area. Optionally, it is also possible to transmit the TMC message in the object body and the audio segment in the optional header.
Eine Weiterbildung dieses Verfahrens besteht darin, mehrere Audiosegmente, Videosegmente und Textlabels im Optional Header zu übertragen. Damit ist es möglich, die Verkehrsdurchsagen in unterschiedlichen Sprachen sowie graphische Darstellung der Verkehrsstörung auf einer Straßenkarte und Textdarstellung der Meldung direkt im Empfänger sichtbar zu machen. Ein nach dem erfindungsgemäßen Verfahren arbeitendes Empfangssegment wird in Figur 5 dargestellt. Vom Sender 1 aus werden die Hörfunkprogramme, die TMC-Meldungen und sonstige Daten über digitalen Hörfunk übertragen. Im DAB-Decoder 2 im Fahrzeug selbst werden zum einen Audio- und Videosignale der laufenden Programme decodiert, generiert, und der Wiedergabeeinheit 8 zugeführt. Zum anderen werden die Multimediaobjekte und die Datenkanäle decodiert. Die TMC-Meldungen werden dem TMC-Decoder 3 zugeführt, die Audio-, Videosegmente und Texteingaben werden dem Management 4 zugeleitet. Der TMC-Decoder entschlüsselt die TMC-Meldungen und leitet sie ebenfalls an das Management 4 weiter. Im Management 4 werden die aus dem DAB-Decoder zukommenden Objekte mit Hilfe der TMC-Meldungen verwaltet. Die richtige Zuordnung der Objekte zueinander, sowie die Speicherung im Speicher 5, und die Aktualisierung und evtl. Löschung der im Speicher 5 abgelegten Objekte wird vom Management gesteuert. Über eine Eingabevorrichtung 7 kann der Benutzer Selektionskriterien eingeben, beispielsweise Autobahnnummern. Diese Eingaben werden mit den in den TMC- Meldungen enthaltenen Angaben bei 6 verglichen und ggf. ausgegeben. Figur 6 zeigt eine mögliche Anordnung einer TMC- Meldung zu einem Objektsatz, der verschiedene Audiosegmente, Videosegmente und Textmeldungen enthält. Diese Meldungen sind ebenfalls über die Selektion anwählbar. A further development of this method consists in transmitting several audio segments, video segments and text labels in the optional header. This makes it possible to make the traffic announcements visible in different languages, as well as a graphic representation of the traffic disruption on a road map and a text representation of the message directly in the recipient. A receiving segment operating according to the method according to the invention is shown in FIG. 5. The radio programs, the TMC messages and other data are transmitted from the transmitter 1 via digital radio. In the DAB decoder 2 in the vehicle itself, audio and video signals of the current programs are decoded, generated and fed to the playback unit 8. On the other hand, the multimedia objects and the data channels are decoded. The TMC messages are fed to the TMC decoder 3, the audio, video segments and text inputs are fed to the management 4. The TMC decoder decrypts the TMC messages and also forwards them to management 4. In Management 4, the objects coming from the DAB decoder are managed using the TMC messages. The correct assignment of the objects to one another, as well as the storage in the memory 5, and the updating and possibly deletion of the objects stored in the memory 5 is controlled by the management. The user can enter selection criteria, for example highway numbers, via an input device 7. These entries are compared with the information contained in the TMC messages at 6 and output if necessary. FIG. 6 shows a possible arrangement of a TMC message for an object set which contains various audio segments, video segments and text messages. These messages can also be selected using the selection.

Claims

Ansprüche Expectations
1. Verfahren zur Übertragung von Verkehrsdurchsagen über digitalen Rundfunk (DAB) , dadurch gekennzeichnet, daß eine Zuordnung der Daten der Meldung des digitalen Verkehrswarnsystems zu den Durchsagedaten des digitalen Radios über die Datenrahmenstruktur des Senders erfolgt.1. A method for the transmission of traffic announcements via digital radio (DAB), characterized in that an assignment of the data of the message of the digital traffic warning system to the announcement data of the digital radio takes place via the data frame structure of the transmitter.
2. Verfahren zur Übertragung von Verkehrsdurchsagen nach Anspruch 1, dadurch gekennzeichnet, daß die digitalen Signale vorzugsweise in unmittelbarem zeitlichem Zusammenhang mit den digitalen Durchsagedaten übertragen werden.2. A method for the transmission of traffic announcements according to claim 1, characterized in that the digital signals are preferably transmitted in direct temporal connection with the digital announcement data.
3. Verfahren zur Übertragung von Durchsagen nach den Ansprüchen 1 und 2, daß als digitale Signale Meldungen des Traffic Message Channel nach dem Protokoll Allert C verwendet werden.3. A method for transmitting announcements according to claims 1 and 2, that messages of the Traffic Message Channel according to the Allert C protocol are used as digital signals.
4. Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die digitalen Signale und die Durchsagen mittels Multimediaobjekten verknüpft werden.4. The method according to claims 1 to 3, characterized in that the digital signals and the announcements are linked by means of multimedia objects.
5. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die digitalen Daten aus Headern und einem Datenbereich (Body) bestehen. 5. The method according to claim 1 to 4, characterized in that the digital data consist of headers and a data area (body).
6 Verfahren nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß der Beginn und das Ende der Verkehrsdurchsage durch ein Linkobjekt mit einem speziellen Header gekennzeichnet wird.6 Method according to claims 1 to 5, characterized in that the start and end of the traffic announcement is identified by a link object with a special header.
7. Verfahren nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß das Linkobjekt einen Hinweis auf eine digitale Meldung im Optional Header enthält, und den Beginn der Verkehrsdurchsage im Audiostrom im Header plus Body markiert.7. The method according to claims 1 to 6, characterized in that the link object contains a reference to a digital message in the optional header, and marks the beginning of the traffic announcement in the audio stream in the header plus body.
8. Verfahren nach den Ansprüchen 1 bis 7, dadurch gekennzeichnet, daß das Multimediaobjekt die digitale Meldung selbst im Header überträgt.8. The method according to claims 1 to 7, characterized in that the multimedia object transmits the digital message itself in the header.
9. Verfahren nach den Ansprüchen 1 bis 8, dadurch gekennzeichnet, daß das Multimediaobjekt die digitale Information sowie die Verkehrsdurchsage als Audiosegment selbst enthält.9. The method according to claims 1 to 8, characterized in that the multimedia object contains the digital information and the traffic announcement as an audio segment itself.
10. Empfänger zum Empfang und zur selektierbaren Wiedergabe von Durchsagen, die in Zusammenhang mit digitalen Informationen empfangen werden, dadurch gekennzeichnet, daß der Empfänger einen speziellen Decoder für die digitalen Meldungen und die Verkahrsdurchsagen enthält.10. Receiver for receiving and for selectable playback of announcements that are received in connection with digital information, characterized in that the receiver contains a special decoder for the digital messages and the traffic announcements.
11. Empfänger nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, daß ein Managementsystem vorgesehen ist, das die hereinkommenden Audio- und digitale Informationen koordiniert. 11. Receiver according to the preceding claim, characterized in that a management system is provided which coordinates the incoming audio and digital information.
EP97922879A 1996-05-08 1997-04-26 Process for transmitting messages by digital sound broadcasting and receiver for carrying out this process Ceased EP0838108A1 (en)

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