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WO1997040595A1 - Procede de transmission numerique d'informations - Google Patents

Procede de transmission numerique d'informations 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
Authority
WO
WIPO (PCT)
Prior art keywords
transmission units
sub
information
areas
transmitted
Prior art date
Application number
PCT/DE1997/000345
Other languages
German (de)
English (en)
Inventor
Thomas Lauterbach
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/fr

Links

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

Selon le procédé décrit de transmission numérique d'informations, notamment de programmes de radio et/ou de télévision à l'intérieur d'une région, les informations sont transmises dans différentes régions partielles en unités de transmission de différentes fréquences. La synchronisation des unités de transmission de régions partielles adjacentes et la coïncidence entre les unités de transmission dans les parties qui contiennent les mêmes informations permettent de réduire les interruptions dans la réception des informations lorsqu'un récepteur mobile passe d'une région partielle à une autre région partielle.
PCT/DE1997/000345 1996-04-20 1997-02-27 Procede de transmission numerique d'informations WO1997040595A1 (fr)

Priority Applications (1)

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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19615843.5 1996-04-20
DE1996115843 DE19615843A1 (de) 1996-04-20 1996-04-20 Verfahren zur digitalen Übertragung von Informationen

Publications (1)

Publication Number Publication Date
WO1997040595A1 true WO1997040595A1 (fr) 1997-10-30

Family

ID=7791982

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/000345 WO1997040595A1 (fr) 1996-04-20 1997-02-27 Procede de transmission numerique d'informations

Country Status (3)

Country Link
AU (1) AU2286397A (fr)
DE (1) DE19615843A1 (fr)
WO (1) WO1997040595A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042376A1 (de) * 2004-09-02 2006-03-09 Robert Bosch Gmbh Empfangseinrichtung zum Empfangen von zeitlich gemultiplexten Signalen, Sendesystem und Verfahren zur zeitlichen Synchronisierung von zeitlich gemultiplexten Signalen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994007314A1 (fr) * 1992-09-15 1994-03-31 British Broadcasting Corporation Procede de synchronisation de frequences emettrices dans la diffusion audio numerique d'ondes communes
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 (fr) * 1992-09-15 1994-03-31 British Broadcasting Corporation Procede de synchronisation de frequences emettrices dans la diffusion audio numerique d'ondes communes
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 *

Also Published As

Publication number Publication date
DE19615843A1 (de) 1997-10-23
AU2286397A (en) 1997-11-12

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