EP1784934B1 - Method and device for the transmission of additional data, relating to alternative r digital transmission frequencies, in an analog radio transmission system - Google Patents
Method and device for the transmission of additional data, relating to alternative r digital transmission frequencies, in an analog radio transmission system Download PDFInfo
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- EP1784934B1 EP1784934B1 EP05753998A EP05753998A EP1784934B1 EP 1784934 B1 EP1784934 B1 EP 1784934B1 EP 05753998 A EP05753998 A EP 05753998A EP 05753998 A EP05753998 A EP 05753998A EP 1784934 B1 EP1784934 B1 EP 1784934B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/36—Arrangements for simultaneous broadcast of plural pieces of information for AM broadcasts
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- 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
Definitions
- the present invention relates to a method and a device for transmitting additional data in an analog radio transmission system, the additional data containing information regarding alternative transmission frequencies of the respective program, and the alternative transmission frequencies relating to digital radio transmission systems.
- the alternative transmission frequencies for digital broadcasting systems are transmitted in AMDS (Amplitude Modulation Data System) format by mapping these SDC (Service Description Channel) data into AMDS format by mapping.
- AMDS Amplitude Modulation Data System
- a digital broadcasting system which transmits, for example, on conventional AM frequencies and has, inter alia, a Service Description Channel (SDC), which is described on pages 63 to 78 as Chapter 6.4.
- SDC Service Description Channel
- the data is divided into SDC blocks and transmitted. Each block contains an indicator called the AFS index, a data field that allows payload data to be transferred, and a checkword used for error detection and error correction.
- the AFS index here is an unsigned binary number between 0 and 15, which indicates the number of transmissions of so-called superframes, which separates this SDC block from the next, with identical content, if in the Identification field of the Fast Accsess Channel
- the 0-symobl is set
- the AFS index should be identical for all SDC blocks and can be changed, for example, during a reconfiguration.
- the data field is divided into a variable number of data entities. This can include an end marker as well as padding bits that fill in empty fields. The length of this data field depends on the selected transmission mode, which determines the robustness of the transmission system.
- the check field also known as Cyclic Redundancy Check (CRC), contains a 16-bit long CRC data word, which is calculated using the AFS index and the data field.
- CRC Cyclic Redundancy Check
- DAB Digital Audio Broadcasting
- VHF / FM Broadcasting crossreferencing to simulcast DAB services by RDS-ODA 147 ", ETSI EN 301 700, published in March 2000 by the European Telecommunications Standards Institute , Sophia Antipolis and the publication " Digital Audio Broadcasting - coming out of the tunnel "by F. Kozamernik, issued on March 21, 1999 by the EBU European Broadcasting Union each show a method according to the preamble of independent claim 1.
- the core of the present invention is to provide a method and a device with which in an analog radio transmission system alternative frequencies of the currently set transmitter can be transmitted, wherein these alternative transmission frequencies may refer to the same frequency band, but refer to a digital Rundfunkuberhngungsungssystem, in particular Digital Radio Musice (DRM).
- DRM Digital Radio Mondiale
- DAB Digital Audio Broadcast
- DRM Digital Radio Mondiale
- DVB-T Digital Video Broadcast - Terrestrial
- IBOC In Band On Channel
- UMTS Universal Mobile Telecommunications System
- the so-called Service Description Channel is provided by means of which additional data can be transmitted.
- This SDC data received from a combination receiver, d. H. from a receiver that can receive both analog AM signals and digital DRM signals, can be evaluated by this without additional effort. Therefore, it is provided to transmit data by means of the SDC format, which are however transmitted for transmission in analog broadcast transmission systems in the so-called AMDS format by means of mapping.
- the AFS index of the SDC blocks is taken over into the data fields of the AMDS blocks. Furthermore, it is advantageous that the Bits of the test field of each AMDS group are generated from the data fields of the acquired SDC data blocks.
- the AMDS blocks are consecutively numbered by means of a counter. It is particularly advantageous that the consecutive numbering of each AMDS group is contained in one or more reserved AMDS data bits.
- the one or more reserved AMDS data bits which contain the consecutive numbering of each AMDS group, are the data bits following the first data bit m35 of the first AMDS block of an AMDS group, that is, the data bits m34, m33, m32, ..., depending on how many bits are needed for the counter.
- the consecutive numbering of each AMDS group is contained in an AMDS data field reserved for this, which consists of several reserved AMDS data bits. Furthermore, it is advantageous that the consecutive numbering of the AMDS groups is carried out by means of synchronization by calculating the content of the test fields by cyclic block codes from the content of the data fields, adding offset pairs to the test fields, calculating pairwise syndromes from the offset values and that the respective content of the AMDS groups can be determined on the basis of the pairwise syndromes obtained. Furthermore, it is advantageous that the device contains a calculation device that determines test words for error detection and error correction as a function of the information contained in the AMDS data field and inserts them into the test fields of the AMDS test fields.
- the device has a counter which consecutively numbers the AMDS blocks and inserts the numbering in an AMDS data field reserved for this purpose.
- a receiver for receiving and reproducing analog and digitally transmitted broadcasting signals, wherein the receiver, upon reproduction of an analog broadcasting signal, receives the additional data transmitted in AMDS format with respect to alternative broadcasting frequencies on which the same program is digitally transmitted; evaluates and in the presence of alternative transmission frequencies on which the same program is transmitted digitally, automatically switches to the digitally transmitted alternative frequency.
- the receiver stores all received additional data relating to alternative transmission frequencies in a database and selects from this database the alternative frequency at which the set radio program is best received.
- the undesirable frequencies are searched in a predetermined order for their type of interrogation, in particular in the order DAB, DRM, FM, AM.
- FIG. 1 the structure of the Amplitude Modulation Data System is shown schematically.
- An AMDS group 1 consists of 94 bits, this AMDS group being equally divided into an AMDS block 1 2 and an AMDS block 2 2 of 47 bits each.
- Such a 47-bit AMDS block 2 is further subdivided into a data field 3 with 36 bits and a test field 4 with 11 bits, wherein the data field transmits the payload and the test field 4 contains a check word which is output from the data field 3 by means of a cyclic code is calculated and used for error detection and error correction.
- the 36-bit data field 3 is further subdivided into AMDS data bits 5, which begin with the designation m35 and are named up to m00, the last AMDS data bit of the user data.
- the test field 4 which consists of 11 AMDS check bits 6, which are numbered beginning with c10 to c00.
- This test field 4 contains information which has been calculated from the data field 3 by means of a cyclic block code.
- FIG. 2 the structure of a Short Description Channel (SDC) block is shown, as used in the digital broadcasting system DRM (Digital Radio Mondiale).
- SDC Short Description Channel
- information is transmitted that, for example, refers to alternative frequencies of the same program, so that when receiving quality degradation of the currently tuned radio program another frequency of the same or a different frequency band can be specified, which currently transmits the same program.
- the digital radio program is also able to refer to either alternative digital frequencies or frequencies at which the same program is transmitted by means of analog broadcast transmission methods such as FM or AM.
- analog broadcast transmission methods such as FM or AM.
- the same radio programs will have to be broadcast both in analog and digital form, since not every listener has a digital receiver.
- the SDC block 7 consists of an AFS index 8 consisting of 4 bits.
- AFS index 8 consisting of 4 bits.
- a data field 9 is transmitted, which can be variable in length and which transmits the user data.
- the data field 9 from different numbers of data blocks 11, which are numbered from 1 to N, consist, depending on which transmission mode and which SDC mode is currently being sent.
- the data field 9 is followed, within the SDC block 7, by a check word 10 which consists of 16 bits and is also referred to as CRC (cyclic redundancy check). This check word 10 is calculated from the bits of the AFS index and the data field and is used for error detection and error correction of the transmitted data.
- CRC cyclic redundancy check
- the SDC blocks such as those transmitted in the DRM system, are juxtaposed with the AMDS data structure to represent the mapping for transmitting the SDC data in AMDS format.
- the SDC blocks 7 are sent consecutively for this purpose.
- Each SDC block 7 here consists of an AFS index 8, followed by 1 to N data blocks 11, which contain the payload.
- the SDC block 7 contains padding bits 12 and a 16-bit long cyclic redundancy check word 13.
- the AFS index information in block 8 and the information of the data blocks 1 to N 11 in the AMDS data structure taken over, with the Paddingbits 12 and the CRC bits 13 are disregarded.
- each AMDS group 1 Since one AMDS group 1 each contains two 47-bit AMDS blocks, each AMDS group has payload bits m35 to m00, followed by 11 AMDS check bits c10 to c00 and once again for the AMDS block 36 payload bits m35 to m00 as well 11 primitives of the AMDS block 2 c10 to c00. Since the first payload bit m35 of the first block of the AMDS Gurppe 1 is reserved to indicate the beginning of an SDC block or to continue the SDC block, the first AMDS payload bit m35 of the block 1 of an AMDS group 1 does not become SDC Data described. The information of the AFS index 8 is therefore written in the AMDS data bits m34 and following of the first AMDS block of the AMDS group 1.
- the data blocks 1 to N 11 following the AFS index 8 are continuously written into the AMDS data bits 5, for which purpose the AMDS data bits m34 to m00 of the AMDS block 1 and the AMDS data bits m35 to m00 of the AMDS block 2 are available stand.
- These AMDS data bits are interrupted by the AMDS Prütbits c10 to c00, which are each calculated and written in response to the preceding AMDS data bits. Since it is not possible from the data scope of an SDC block, the user data of an SDC block completely into an AMDS group, several AMDS groups 1 are hung one after the other until the complete payload of an SDC block is accommodated in AMDS groups 1.
- the first AMDS data bit m35 of the first AMDS block can be used by setting the m35 bit of this first AMDS block of an AMDS group to 1, if it is the first AMDS group that starts the AMDS group Contains user data of an SDC block or by setting the m35 bit of the first AMDS block of an AMDS group to 0 to indicate that this AMDS group is a continuation of a previous AMDS group concerning the same SDC block ,
- the check bits c10 to c00 6 of the AMDS groups 1 are calculated and transmitted as a function of the preceding useful bits m35 to m00. Furthermore, it makes sense to number the AMDS groups, since a transmission in the AM band is frequently disturbed and therefore multiple transmission of the AMDS groups in succession is advantageous.
- the AMDS groups By numbering the AMDS groups, it is possible to determine which AMDS groups that were transmitted consecutively with the same content belong together and from which AMDS group new information is transmitted. That the receiver can recognize the repetitions, or recognize when a new AMDS group is sent, it is also advantageous that a continuous counter is provided. In this case, the AMDS groups containing the same information can also be transmitted several times and possibly at intervals, which advantageously requires a 3 or 4 bit counter.
- FIG. 4 is such a counter shown in which an AMDS group 1 is shown, which consists of two consecutive AMDS blocks, each AMDS block of useful bits m35 to m00 and then subsequently from the check bits c10 to c00 exists. Since the first data bit of the first AMDS block of the AMDS group 1 (m35) is reserved to indicate the beginning or continuation of an SDC block, the subsequent 3 bits or 4 bits, namely, the bits m34 to m32 and m34, respectively to m31 of the first AMDS block of the AMDS group for an AMDS group counter so that the AMDS useful bits m31 to m00 or m30 to m00 of the first AMDS block and the data bits m35 to m00 of the second AMDS block of the AMDS group are available for the actual information of the payload bits m34 to m32 of the first AMDS block can be advantageously started with a 0 symbol to indicate the beginning of an SDC block.
- the following AMDS groups contain incremented counter symbols to detect when
- the counter implicitly with the synchronization mechanism by additionally defining pairs of offset words, the number of offset word pairs corresponding to the number of groups the counter is to distinguish.
- the offset word pairs are added in the receiver to the test words of the two blocks that make up an AMDS group. Groups with the same content use the same offset word pairs.
- the received bitstream is fed to the decoder in blocks of 47 bits each and a syndrome is calculated. Then the block division is shifted by one bit and the syndrome of the new code word thus created is calculated again. When the first syndrome of a syndrome pair occurs, the next 47-bit block is fed to the decoder. When the second syndrome of the syndrome pair arises, synchronization is achieved.
- the corresponding offset words are then added and the blocks are fed to the decoder.
- syndrome 0 occurs, the block is error free and can be decoded. It should be noted that in successive blocks each a related pair of offset words is used. If the synchronization has taken place, then in the following block each of the first offset words of the offset word pairs must be added until a decoding with syndrome 0 is possible. Then the next following block with the associated second offset word of the offset word pair can be decoded.
- FIG. 5 a schematic block diagram of a device according to the invention is shown.
- the mapping device 14 SDC blocks are supplied for this purpose, which are output after processing as AMDS groups.
- the SDC blocks supplied to the mapping device 14 enter a truncation device 15 in which the padding bits 12 and the check bits (CRC) 13 of the SDC blocks are removed. Thereafter, the output of the cutter 15 a strigbitein Stahl 16 supplied.
- CRC check bits
- the output signal of the clipping device 15 is fed to a check bit calculator 17 in which check bits c10 to c00 are respectively calculated from the AMDS data fields m35 to m00 which are fed to the check bit inserter 16 which supplies the calculated check bits c10 to c00 of the test field 4 to the designated ones Places of the AMDS block are inserted.
- the output of the check bit inserter 16 is passed to the counter fuser 18.
- the counter inserter 18 is supplied with signals to a counter 19, which numbers the individual AMDS blocks and feeds this number to the counter inserter 18, which inserts them into the payload first payload bits of the first block of an AMDS group, ie in the case of a 3-bit counter at the positions m34 to m32 of the first block. If a 4-bit counter is used, bits m34 to m31 of the first block of an AMDS group are used for this purpose.
- the first payload bit m35 of the block 1 of an AMDS group is set to 0 if this AMDS group contains the beginning of a new SDC block, or the m35 bit of the first block of the AMDS group becomes 0 is set if this AMDS group is a continuation of the information of an SDC block of a preceding AMDS group
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Description
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Übertragung von Zusatzdaten in einem analogen Rundfunkübertragungssystem, wobei die Zusatzdaten Informationen bezüglich alternativer Sendefrequenzen des jeweiligen Programmes enthalten, und die alternativen Sendefrequenzen digitale Rundfunkübertragungssysteme betreffen. Die alternativen Sendefrequenzen für digitale Rundfunkübertragungssysteme werden im AMDS (Amplituden Modulation Data System)-Format übertragen, indem diese SDC (Service Description Channel)-Daten mittels Mapping in das AMDS-Format übertragen werden.The present invention relates to a method and a device for transmitting additional data in an analog radio transmission system, the additional data containing information regarding alternative transmission frequencies of the respective program, and the alternative transmission frequencies relating to digital radio transmission systems. The alternative transmission frequencies for digital broadcasting systems are transmitted in AMDS (Amplitude Modulation Data System) format by mapping these SDC (Service Description Channel) data into AMDS format by mapping.
Aus der technischen Spezifikation (
Aus der ITU-Recommendation BS.706-2 mit dem Titel "Data System in Monophonic AM Sound Broadcasting (AMDS)" vom Februar 1998 ist ein Protokoll für analogen Rundfunk bekannt, mit dem Zusatzinfonnationen bezüglich alternativer Frequenzen übertragen werden können, so dass bei einer gravierenden Verschlechterung der Empfangsqualität auf eine andere Empfangsfrequenz durch den Empfänger automatisch gewechselt werden kann.From ITU Recommendation BS.706-2 entitled "Data System in Monophonic AM Sound Broadcasting (AMDS)" of February 1998, a protocol for analog broadcasting is known, with the additional information on alternative frequencies can be transmitted, so that in a serious deterioration of the reception quality to another reception frequency can be automatically changed by the receiver.
Trotz der bevorherstehenden Einführung von DRM für die digitale Rundfunkübertragung auf Langwelle, Mittelwelle und Kurzwelle werden einige Zeit lang die selben Programme sowohl in analoger (AM) als auch Digitaler Technik (DRM) abgestrahlt werden. Wegen der begrenzten Anzahl von Kanälen kann es häufig der Fall sein, dass nicht in jedem Frequenzbereich sowohl ein analoges als auch in digitales Signal gesendet werden kann. Insbesondere auf Kurzwelle haben die verschiedenen Frequenzbereiche unterschiedliche Ausbreitungsverhältnisse. Es kann daher erforderlich sein, dass ein Empfänger, der zunächst auf ein DRM-Programm eingestellt ist und dort das Signal verliert auf ein anderes Band wechseln muss, in dem das Programm aber nur analog gesendet wird. Um dort weiterhin mögliche Alternativfrequenzen, insbesondere auch solche auf denen digital gesendet wird, verweisen zu können, wird bei der analogen Übertragung das AMDS verwendet.Despite the upcoming introduction of DRM for long-wave, medium wave and short wave digital broadcasting, the same programs will be broadcast for some time in both analog (AM) and digital (DRM) technology. Because of the limited number of channels, it can often be the case that both an analog and a digital signal can not be transmitted in each frequency range. Especially on shortwave, the different frequency ranges have different propagation ratios. It may therefore be necessary for a receiver that is initially set to a DRM program and loses the signal there to change to another band, but in which the program is only transmitted in analog mode. In order to continue to be able to reference possible alternative frequencies, especially those on which digital transmission is possible, the AMDS is used in the analog transmission.
Die Veröffentlichung "
Aus der Veröffentlichung "
Der Kern der vorliegenden Erfindung ist es, ein Verfahren und eine Vorrichtung anzugeben, mit denen in einem analogen Rundfunkübertagungssystem Alternativfrequenzen des gerade eingestellten Senders übermittelbar sind, wobei diese alternativen Sendefrequenzen das gleiche Frequenzband betreffen können, jedoch auf ein digitales Rundfunkuberhngungssystem, insbesondere Digital Radio Mondiale (DRM) verweisen. Erfindungsgemäß wird dieses durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen und Ausgestaltungen ergeben sich aus den Unteransprüchen.The core of the present invention is to provide a method and a device with which in an analog radio transmission system alternative frequencies of the currently set transmitter can be transmitted, wherein these alternative transmission frequencies may refer to the same frequency band, but refer to a digital Rundfunkuberhngungsungssystem, in particular Digital Radio Mondiale (DRM). According to the invention this is achieved by the features of the independent claims. Advantageous developments and refinements emerge from the subclaims.
Weiterhin ist es vorteilhaft, dass das digitale Rundfankübertragungssystem im DAB (Digital Audio Broadcast)-Format oder im DRM (Digital Radio Mondiale)-Format oder im DVB-T (Digital Video Broadcast - Terrestrisch)-Format oder im iBiquity-Format oder im IBOC (In Band On Channel)-Format oder im UMTS (Universal Mobile Telecommunications System)-Format ausgestrahlt wird. Insbesondere die Verwendung hinsichtlich DRM-Systemen ist vorteilhaft, da DRM-Programme im AM-Band übertragen werden, auf dem auch analoge Hörfunkprogramme abgestrahlt werden, die das AMDS-Protokoll verwenden.Furthermore, it is advantageous that the digital Rundfankübertragungssystem in DAB (Digital Audio Broadcast) format or in DRM (Digital Radio Mondiale) format or in DVB-T (Digital Video Broadcast - Terrestrial) format or in iBiquity format or in the IBOC (In Band On Channel) format or in the UMTS (Universal Mobile Telecommunications System) format is broadcast. In particular, the use in terms of DRM systems is advantageous because DRM programs are transmitted in the AM band, on which also analog radio programs are broadcast using the AMDS protocol.
Innerhalb des DRM-Systems ist der sogenannte Service Description Channel vorgesehen, mittels dem Zusatzdaten übertragbar sind. Diese SDC-Daten, die von einem Kombinationsempfinger empfangen werden, d. h. von einem Empfänger der sowohl analoge AM-Signale als auch digitale DRM-Signale empfangen kann, sind von diesem ohne zusätzlichen Aufwand auswertbar. Daher wird vorgesehen, mittels des SDC-Formats Daten zu übertragen, die jedoch zur Abstrahlung in analogen Rundfunkübertragungssystemen in das sogenannte AMDS-Format mittels Mapping übertragen werden.Within the DRM system, the so-called Service Description Channel is provided by means of which additional data can be transmitted. This SDC data received from a combination receiver, d. H. from a receiver that can receive both analog AM signals and digital DRM signals, can be evaluated by this without additional effort. Therefore, it is provided to transmit data by means of the SDC format, which are however transmitted for transmission in analog broadcast transmission systems in the so-called AMDS format by means of mapping.
Weiterhin ist es vorteilhaft, dass zusätzlich der AFS-Index der SDC-Blöcke in die Datenfelder der AMDS-Blöcke übemommen wird. Weiterhin ist es vorteilhaft, das die Bits des Prüffeldes einer jeden AMDS-Gruppe aus den Datenfeldern der übernommenen SDC-Datenblöcke generiert werden.Furthermore, it is advantageous that additionally the AFS index of the SDC blocks is taken over into the data fields of the AMDS blocks. Furthermore, it is advantageous that the Bits of the test field of each AMDS group are generated from the data fields of the acquired SDC data blocks.
Weiterhin ist es vorteilhaft, dass die AMDS-Blöcke mittels eines Zählers fortlaufend durchnummeriert werden. Besonders vorteilhaft ist es, dass die fortlaufende Nummerierung jeder AMDS-Gruppe in einem oder mehreren hierfür reservierten AMDS-Datenbits enthalten ist.Furthermore, it is advantageous that the AMDS blocks are consecutively numbered by means of a counter. It is particularly advantageous that the consecutive numbering of each AMDS group is contained in one or more reserved AMDS data bits.
Vorteilhaft ist es, dass das eine oder die mehreren reservierten AMDS-Datenbits, die die fortlaufende Nummerierung jeder AMDS-Gruppe beinhalten, die dem ersten Datenbit m35 des ersten AMDS-Blocks einer AMDS-Gruppe folgenden Datenbits sind, also die Datenbits m34, m33, m32,..., je nachdem wieviel Bit für den Zähler benötigt werden.It is advantageous that the one or more reserved AMDS data bits, which contain the consecutive numbering of each AMDS group, are the data bits following the first data bit m35 of the first AMDS block of an AMDS group, that is, the data bits m34, m33, m32, ..., depending on how many bits are needed for the counter.
Weiterhin ist es vorteilhaft, dass die gleichen AMDS-Gruppen mehrfach gesendet werden.Furthermore, it is advantageous that the same AMDS groups are sent multiple times.
Besonders vorteilhaft ist es, dass die fortlaufende Nummerierung jeder AMDS-Gruppe in einem hierfür reservierten AMDS-Datenfeld, das aus mehreren reservierten AMDS-Datenbits besteht, enthalten ist. Weiterhin ist es vorteilhaft, dass die fortlaufende Durchnummerierung der AMDS-Gruppen mittels der Synchronisation erfolgt, indem mittels zyklischen Blockcodes aus dem Inhalt der Datenfelder der Inhalt der Prüffelder berechnet wird, dass zu den Prüffeldern Offsetwertepaare addiert werden, dass aus den Offsetwerten paarweise Syndrome berechnet werden und dass anhand der erhaltenen paarweisen Syndrome der jeweilige Inhalt der AMDS-Gruppen bestimmbar ist. Weiterhin ist es vorteilhaft, dass die Vorrichtung eine Berechnungseinrichtung enthält, die in Abhängigkeit der in den AMDS-Datenfeldem enthaltenen Information Prüfwörter zur Fehlererkennung und Fehlerkorrektur ermittelt und in die Prüffelder der AMDS-Prüffelder einfügt.It is particularly advantageous that the consecutive numbering of each AMDS group is contained in an AMDS data field reserved for this, which consists of several reserved AMDS data bits. Furthermore, it is advantageous that the consecutive numbering of the AMDS groups is carried out by means of synchronization by calculating the content of the test fields by cyclic block codes from the content of the data fields, adding offset pairs to the test fields, calculating pairwise syndromes from the offset values and that the respective content of the AMDS groups can be determined on the basis of the pairwise syndromes obtained. Furthermore, it is advantageous that the device contains a calculation device that determines test words for error detection and error correction as a function of the information contained in the AMDS data field and inserts them into the test fields of the AMDS test fields.
Weiterhin ist es vorteilhaft, dass die Vorrichtung eine Zähleinrichtung aufweist, die die AMDS-Blöcke fortlaufend durchnumeriert und die Numerierung in einem hierfür reservierten AMDS-Datenfeld eingefügt wird.Furthermore, it is advantageous that the device has a counter which consecutively numbers the AMDS blocks and inserts the numbering in an AMDS data field reserved for this purpose.
Vorteilhafterweise ist ein Empfänger vorgesehen, zum Empfang und zur Wiedergabe von analog und digital übertragenen Rundfunksignalen vorgesehen, wobei der Empfänger bei Wiedergabe eines analog übertragenen Rundfunksignals die im AMDS-Format übertragenen Zusatzdaten bezüglich alternativer Sendefrequenzen, auf denen das gleiche Programm digital übertragen wird, empfängt, auswertet und bei Vorhandensein alternativer Sendefrequenzen auf denen das gleiche Programm digital übertragen wird, automatisch auf die digital übertragene Alternativfrequenz umschaltet.Advantageously, a receiver is provided for receiving and reproducing analog and digitally transmitted broadcasting signals, wherein the receiver, upon reproduction of an analog broadcasting signal, receives the additional data transmitted in AMDS format with respect to alternative broadcasting frequencies on which the same program is digitally transmitted; evaluates and in the presence of alternative transmission frequencies on which the same program is transmitted digitally, automatically switches to the digitally transmitted alternative frequency.
Vorteilhafterweise speichert der Empfänger alle empfangenen Zusatzdaten bezüglich alternativer Sendefrequenzen in einer Datenbank und wählt aus dieser Datenbank die Alternativfrequenz aus, auf der das eingestellte Rundfunkprogramm am besten empfangen wird.Advantageously, the receiver stores all received additional data relating to alternative transmission frequencies in a database and selects from this database the alternative frequency at which the set radio program is best received.
Vorteilhafterweise werden zur Auswahl einer Alternativfrequenz aus der Datenbank die Albernativfrequenzen in einer vorbestimmten Reihenfolge nach ihrer Überfragungsart abgesucht, insbesondere in der Reihenfolge DAB, DRM, FM, AM.Advantageously, to select an alternative frequency from the database, the undesirable frequencies are searched in a predetermined order for their type of interrogation, in particular in the order DAB, DRM, FM, AM.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand von Zeichnungen erläutert. Es zeigen
Figur 1- den Aufbau des AMDS-(Amplituden Modulations Data System)-Formats,
Figur 2- den Aufbau des SDC (Service Description Channel)-Formats, wie es bei DRM (Digital Radio Mondiale) verwendet wird,
Figur 3- das Mapping der SDC-Information auf AMDS-Gruppen,
Figur 4- die Realisierung eines Zählers sowie
Figur 5- eine schematische Darstellung eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung.
- FIG. 1
- the structure of the AMDS (Amplitude Modulation Data System) format,
- FIG. 2
- the structure of the SDC (Service Description Channel) format, as used in DRM (Digital Radio Mondiale)
- FIG. 3
- the mapping of the SDC information to AMDS groups,
- FIG. 4
- the realization of a counter as well
- FIG. 5
- a schematic representation of an embodiment of the device according to the invention.
In
In
In
In
Alternativ hierzu ist es auch möglich, den Zähler implizit mit dem Synchronisationsmechanismus zu realisieren indem zusätzlich Paare von Offsetworten definiert werden, wobei die Anzahl der Offsetwortpaare der Anzahl Gruppen entspricht, die der Zähler unterscheiden soll. Die Offsetwortpaare werden im Empfänger zu den Prüfworten der beiden Blöcke, aus denen eine AMDS-Gruppe besteht, binär addiert. Gruppen mit gleichem Inhalt verwenden hierbei dieselben Offsetwortpaare. Zur Synchronisierung des Empfängers wird der empfangene Bitstrom dem Decoder in Blöcken zu je 47 Bit zugeführt und ein Syndrom berechnet. Dann wird die Blockeinteilung um ein Bit verschoben und erneut das Syndrom des so entstandenen neuen Codeworts berechnet. Wenn das erste Syndrom eines Syndrompaars entsteht, wird der nächste 47 Bit-Block dem Decoder zugeführt. Wenn dann das zweite Syndrom des Syndrompaares entsteht, ist die Synchronisation erreicht. Bei den folgenden Blöcken werden dann die entsprechenden Offsetworte addiert und die Blöcke dem Decoder zugeführt. Wenn das Syndrom 0 entsteht, ist der Block fehlerfrei und kann decodiert werden. Hierbei ist zu beachten, dass in aufeinanderfolgenden Blöcken jeweils ein zusammengehöriges Paar von Offsetworten verwendet wird. Ist die Synchronisation erfolgt, so muss bei dem folgenden Block jedes der ersten Offsetworte der Offsetwortpaare addiert werden, bis eine Decodierung mit Syndrom 0 möglich ist. Dann kann der nächste folgende Block mit dem zugehörigen zweiten Offsetwort des Offsetwortpaars decodiert werden.Alternatively, it is also possible to implement the counter implicitly with the synchronization mechanism by additionally defining pairs of offset words, the number of offset word pairs corresponding to the number of groups the counter is to distinguish. The offset word pairs are added in the receiver to the test words of the two blocks that make up an AMDS group. Groups with the same content use the same offset word pairs. To synchronize the receiver, the received bitstream is fed to the decoder in blocks of 47 bits each and a syndrome is calculated. Then the block division is shifted by one bit and the syndrome of the new code word thus created is calculated again. When the first syndrome of a syndrome pair occurs, the next 47-bit block is fed to the decoder. When the second syndrome of the syndrome pair arises, synchronization is achieved. In the following blocks, the corresponding offset words are then added and the blocks are fed to the decoder. When
In
Claims (14)
- Method for transmitting supplementary data in an analogue (AM) broadcast radio transmission system, wherein the supplementary data contain information concerning alternative transmission frequencies for the respective station, wherein the alternative transmission frequencies relate to digital broadcast radio transmission systems and the alternative transmission frequencies for digital broadcast radio transmission systems (DRM, DAB, iBiquity, IBOC, UMTS) are transmitted in the AMDS, Amplitude Modulation Data System as per ITU Recommendation BS.706-2, format (1, 2, 3, 4, 5, 6) by virtue of the data transmitted in the AMDS format (1, 2, 3, 4, 5, 6) being SDC, Service Description Channel as per ETSI TS 101 980, data (7, 8, 9, 10, 11, 12,) which are transmitted by means of mapping into the AMDS format by virtue of the data blocks (11) of the SDC information being transferred to portions of the data fields (3) of the AMDS blocks (2) and a data bit (5) from each AMDS group (1) indicating whether this is the first or a subsequent AMDS group (1) from a multiplicity of successively transmitted AMDS groups (1) which together contain the information from an SDC block (7), characterized in that the first data bit (m35 from block1) from the first AMDS block (2) in each AMDS group (1) indicates whether this is the first (m35=1) or a subsequent (m35=0) AMDS group (1) from a multiplicity of successively transmitted AMDS groups (1) which together contain the information from an SDC block (7).
- Method according to Claim 1, characterized in that the digital broadcast radio transmission system is broadcast in the DAB (Digital Audio Broadcast) format or in the DRM (Digital Radio Mondiale) format (7, 8, 9, 10, 11, 12) or in the DVB-T (Digital Video Broadcast, Terrestrial) format or in the iBiquity format or in the IBOC (In Band On Channel) format or in the UMTS (Universal Mobile Telecommunications System) format.
- Method according to Claim 1, characterized in that additionally the AFS index (8) from the SDC blocks (7) is transferred to the data fields (3) of the AMDS blocks (2), and the bits (6) from the check field (4) of each AMDS group (1) are generated from the data fields (9) of the transferred SDC data blocks (7).
- Method according to one of the preceding claims, characterized in that the AMDS groups (1) are consecutively numbered by means of a counter (m34, m33, m32 from block1).
- Method according to Claim 4, characterized in that the consecutive numbering of each AMDS group (1) is contained in one or more MDS data bits (m34, m33, m32) reserved for this purpose.
- Method according to one of Claims 4 and 5, characterized in that the one or more reserved AMDS data bits (m34, m33, m32) which contain the consecutive numbering of each AMDS group (1) are the data bit (m34, m33, m32, ...) which follow the first data bit (m35) from the first AMDS block (2) in an AMDS group (1).
- Method according to one of the preceding claims, characterized in that the same AMDS groups (1) are sent more than once.
- Method according to one of the preceding claims, characterized in that the consecutive numbering of the AMDS groups (1) is effected by means of the synchronization by virtue of- cyclic block codes being used to calculate the content of the check fields (6) from the content of the data fields (5),- offset value pairs being added to the check fields (6),- syndromes being calculated in pairs from the offset values, and- the paired syndromes obtained being able to be used to determine the respective content of the AMDS groups.
- Apparatus for producing supplementary data which are broadcast in an analogue broadcast radio transmission system (AM), wherein the supplementary data contain information concerning alternative transmission frequencies for the respective station, wherein SDC, Service Description Channel as per ETSI TS 101 980, data (11) can be supplied to the apparatus, said data being converted by the apparatus (14) into AMDS, Amplitude Modulation Data System as per ITU Recommendation BS. 706-2, data fields (3), characterized in that the apparatus is designed to carry out the method according to one of Claims 1 to 8.
- Apparatus according to Claim 9, characterized in that the apparatus (14) contains a calculation device (17) which takes the information contained in the AMDS data fields (3) as a basis for ascertaining check words (4) for error recognition and error correction and inserting them into the check fields (6) from the AMDS check fields.
- Apparatus according to one of Claims 9 and 10, characterized in that the apparatus has a counting device (19) which consecutively numbers the AMDS groups (1), and the numbering is inserted into at least one AMDS data field (m34, m33, m32) provided for this purpose.
- Receiver for receiving and reproducing broadcast radio signals transmitted in analogue and digital form, wherein the receiver is designed to accompany reproduction of a broadcast radio signal transmitted in analogue form by receiving the supplementary data - transmitted in the AMDS format - concerning alternative transmission frequencies on which the same station is transmitted in digital form, by evaluating said supplementary data and, if there are alternative transmission frequencies present on which the same station is transmitted in digital form, by automatically changing over to the alternative frequency transmitted in digital form, characterized in that the supplementary data contain information concerning alternative transmission frequencies for the respective station, wherein the alternative transmission frequencies relate to digital broadcast radio transmission systems and the alternative transmission frequencies for digital broadcast radio transmission systems (DRM, DAB, iBiquity, IBOC, UMTS) are transmitted in the AMDS, Amplitude Modulation Data System as per ITU Recommendation BS.706-2, format (1, 2, 3, 4, 5, 6) by virtue of the data transmitted in the AMDS format (1, 2, 3, 4, 5, 6) being SDC, Service Description Channel as per ETSI TS 101 980, data (7, 8, 9, 10, 11, 12) which are transmitted by means of mapping into the AMDS format by virtue of the data blocks (11) of the SDC information being transferred to portions of the data fields (3) of the AMDS blocks (2) and a data bit (5) from each AMDS group (1) indicating whether this is the first or a subsequent AMDS group (1) from a multiplicity of successively transmitted AMDS groups (1) which together contain the information from an SDC block (7), characterized in that the first data bit (m35 from block1) from the first AMDS block (2) in each AMDS group (1) indicates whether this is the first (m35=1) or a subsequent (m35=0) AMDS group (1) from a multiplicity of successively transmitted AMDS groups (1) which together contain the information from an SDC block (7).
- Receiver according to Claim 12, characterized in that the receiver stores all received supplementary data concerning alternative transmission frequencies in a database and selects from said database the alternative frequency on which the selected broadcast radio station is best received.
- Receiver according to Claim 13, characterized in that for the purpose of selecting an alternative frequency from the database the alternative frequencies are searched in a predetermined order on the basis of their transmission type, particularly in the order DAB, DRM, FM, AM.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004032286A DE102004032286A1 (en) | 2004-07-02 | 2004-07-02 | Method and device for transmitting additional data in an analog radio transmission system |
PCT/EP2005/052478 WO2006003063A1 (en) | 2004-07-02 | 2005-05-31 | Method and device for the transmission of additional data, relating to alternative r digital transmission frequencies, in an analog radio transmission system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1784934A1 EP1784934A1 (en) | 2007-05-16 |
EP1784934B1 true EP1784934B1 (en) | 2012-09-26 |
Family
ID=34970866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05753998A Expired - Fee Related EP1784934B1 (en) | 2004-07-02 | 2005-05-31 | Method and device for the transmission of additional data, relating to alternative r digital transmission frequencies, in an analog radio transmission system |
Country Status (7)
Country | Link |
---|---|
US (1) | US8009703B2 (en) |
EP (1) | EP1784934B1 (en) |
KR (1) | KR101013646B1 (en) |
CN (1) | CN1981466B (en) |
CA (1) | CA2540976C (en) |
DE (1) | DE102004032286A1 (en) |
WO (1) | WO2006003063A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010028070A1 (en) * | 2010-04-22 | 2011-10-27 | Robert Bosch Gmbh | Digital object outputting method involves receiving two time-sequentially transmitted digital data packets, which are assigned program over primary radio end channel |
US9270306B2 (en) * | 2010-07-28 | 2016-02-23 | Mitsubishi Electric Corporation | Receiving device for receiving a hybrid broadcast |
KR101144417B1 (en) | 2010-09-27 | 2012-05-10 | 현대자동차주식회사 | A data communication apparatus using radio frequency and method thereof |
KR101327162B1 (en) * | 2011-02-16 | 2013-11-06 | 한신대학교 산학협력단 | Design of SW Common Receiver for Multi-mode Digital Radios |
CN113726912B (en) * | 2021-11-03 | 2022-02-15 | 深圳市信润富联数字科技有限公司 | Data synchronization method, system and storage medium between cloud end and edge end |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4540849A (en) | 1983-06-08 | 1985-09-10 | International Teldata Ii Corp. | Meter interface unit for utility meter reading system |
DE4039673C1 (en) | 1990-12-12 | 1992-05-14 | Institut Fuer Rundfunktechnik Gmbh, 8000 Muenchen, De | |
US5588022A (en) * | 1994-03-07 | 1996-12-24 | Xetron Corp. | Method and apparatus for AM compatible digital broadcasting |
US6201798B1 (en) | 1997-11-14 | 2001-03-13 | Worldspace Management Corporation | Signaling protocol for satellite direct radio broadcast system |
JP2955285B1 (en) * | 1998-09-30 | 1999-10-04 | 松下電器産業株式会社 | Digital audio receiver |
DE69940400D1 (en) * | 1999-06-29 | 2009-03-26 | Sony Deutschland Gmbh | Radio receiver for multiple transmission system |
US6549544B1 (en) * | 1999-11-10 | 2003-04-15 | Ibiquity Digital Corporation | Method and apparatus for transmission and reception of FM in-band on-channel digital audio broadcasting |
WO2003040752A1 (en) | 2001-11-06 | 2003-05-15 | Chang-Don Kee | Pseudolite-based precise positioning system with synchronised pseudolites |
KR101006818B1 (en) | 2007-12-12 | 2011-01-10 | 이근진 | Apparatus that decreasing standby power of electronic appliance and receptacle |
-
2004
- 2004-07-02 DE DE102004032286A patent/DE102004032286A1/en not_active Withdrawn
-
2005
- 2005-05-31 WO PCT/EP2005/052478 patent/WO2006003063A1/en active Application Filing
- 2005-05-31 CN CN2005800224815A patent/CN1981466B/en not_active Expired - Fee Related
- 2005-05-31 US US11/631,198 patent/US8009703B2/en not_active Expired - Fee Related
- 2005-05-31 CA CA2540976A patent/CA2540976C/en not_active Expired - Fee Related
- 2005-05-31 KR KR1020067027794A patent/KR101013646B1/en not_active IP Right Cessation
- 2005-05-31 EP EP05753998A patent/EP1784934B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1981466B (en) | 2013-06-19 |
EP1784934A1 (en) | 2007-05-16 |
CA2540976A1 (en) | 2006-01-12 |
CA2540976C (en) | 2013-05-14 |
CN1981466A (en) | 2007-06-13 |
DE102004032286A1 (en) | 2006-01-19 |
US8009703B2 (en) | 2011-08-30 |
KR20070036087A (en) | 2007-04-02 |
US20100002609A1 (en) | 2010-01-07 |
WO2006003063A1 (en) | 2006-01-12 |
KR101013646B1 (en) | 2011-02-10 |
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