EP0838108A1 - Procede de transmission de messages par radiodiffusion audionumerique et recepteur de mise en oeuvre du procede - Google Patents

Procede de transmission de messages par radiodiffusion audionumerique et recepteur de mise en oeuvre du procede

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)
English (en)
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/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0838108A1 publication Critical patent/EP0838108A1/fr
Ceased legal-status Critical Current

Links

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.

Landscapes

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

Abstract

Ce procédé de transmission par radiodiffusion numérique de messages concernant le trafic routier au moyen du code TMC (canal de messages sur le trafic routier) permet d'attribuer de manière aisée les signaux audio aux données TMC. L'attribution est déterminée par les trames de données de l'émetteur numérique et par le protocole de données correspondant.
EP97922879A 1996-05-08 1997-04-26 Procede de transmission de messages par radiodiffusion audionumerique et recepteur de mise en oeuvre du procede Ceased EP0838108A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19618341 1996-05-08
DE19618341 1996-05-08
DE19630195A DE19630195A1 (de) 1996-05-08 1996-07-26 Verfahren zur Übertragung von Durchsagen mit Empfänger zur Durchführung des Verfahrens
DE19630195 1996-07-26
PCT/DE1997/000858 WO1997042723A1 (fr) 1996-05-08 1997-04-26 Procede de transmission de messages par radiodiffusion audionumerique et recepteur de mise en oeuvre du procede

Publications (1)

Publication Number Publication Date
EP0838108A1 true EP0838108A1 (fr) 1998-04-29

Family

ID=26025484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97922879A Ceased EP0838108A1 (fr) 1996-05-08 1997-04-26 Procede de transmission de messages par radiodiffusion audionumerique et recepteur de mise en oeuvre du procede

Country Status (3)

Country Link
US (1) US6434138B2 (fr)
EP (1) EP0838108A1 (fr)
WO (1) WO1997042723A1 (fr)

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Also Published As

Publication number Publication date
US20010043584A1 (en) 2001-11-22
US6434138B2 (en) 2002-08-13
WO1997042723A1 (fr) 1997-11-13

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