DE4237366A1 - Digital audio signal transmitter serving several programme- presenting stations - each allocated to DSR receiver, using received DSR clock pulse signal for synchronisation of digital audio signals - Google Patents

Digital audio signal transmitter serving several programme- presenting stations - each allocated to DSR receiver, using received DSR clock pulse signal for synchronisation of digital audio signals

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Publication number
DE4237366A1
DE4237366A1 DE19924237366 DE4237366A DE4237366A1 DE 4237366 A1 DE4237366 A1 DE 4237366A1 DE 19924237366 DE19924237366 DE 19924237366 DE 4237366 A DE4237366 A DE 4237366A DE 4237366 A1 DE4237366 A1 DE 4237366A1
Authority
DE
Germany
Prior art keywords
dsr
digital audio
transmitted
audio signals
stations
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.)
Withdrawn
Application number
DE19924237366
Other languages
German (de)
Inventor
Josef Dipl Ing Kirchner
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.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
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Filing date
Publication date
Application filed by Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Priority to DE19924237366 priority Critical patent/DE4237366A1/en
Publication of DE4237366A1 publication Critical patent/DE4237366A1/en
Withdrawn legal-status Critical Current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
    • H04H20/02—Arrangements for relaying broadcast information
    • H04H20/06—Arrangements for relaying broadcast information among broadcast stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18523—Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
    • 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
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/95—Arrangements characterised by the broadcast information itself characterised by a specific format, e.g. MP3 (MPEG-1 Audio Layer 3)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/51—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for satellite broadcast 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
    • H04H2201/19—Aspects of broadcast communication characterised by the type of broadcast system digital satellite radio [DSR]

Abstract

The DSR transmission system uses a satellite transmission path reducing the transmitted digital audio signals by MUSICAM coders, compatible with the human ear. They are transmitted to a ground station via a single channel per carrier channel of the satellite transmission path, and retransmitted as a DSR signal pack to the individual transmitters of the radio transmission network. Each programme-presenting station is allocated a DSR receiver, which uses the received clock pulse signal for synchronising the data reduced, digital audio signals to be transmitted. In the ground station, the so synchronised transmitted, data reduced, digital audio signals of the single channel per carrier channels are directly fed to a DSR modulator and transmitted as a DSR signal packet to the network transmitters. ADVANTAGE - MUSICAM coded signals transmission with small number of appts. without quality loss.

Description

Die Erfindung geht aus von einer Anordnung laut Ober­ begriff des Hauptanspruches.The invention is based on an arrangement according to Ober concept of the main claim.

Eine Anordnung dieser Art ist bekannt (DSR-Digital-Ra­ dio-bald europaweit, Infosat-Europas Nr. 1 Heft 7 Ausgabe Juli 1992 Nummer 52).An arrangement of this type is known (DSR-Digital-Ra dio-soon throughout Europe, Infosat-Europe's No. 1 issue 7 edition July 1992 number 52).

Bei diesem Feldversuch wurden die zur Bodenstation der Satelliten-Verbindung übertragenen, jeweils MUSICAM-da­ tenreduzierten digitalen Tonsignale der einzelnen Pro­ grammanbieter-Stationen mittels MUSICAM-Decoder in analoge Mono- bzw. Stereo-Tonsignale rückgewandelt, anschließend wieder digitalisiert und dann über den DSR-Modulator (Digital-Satellit-Radio, beschrieben in "Neues von Rohde & Schwarz", Heft 114, Sommer 1986, Seiten 13 bis 16) der Satelliten-Übertragungsstrecke zugeführt. Diese bekannte Art der Aufbereitung des DSR-Signalpaketes im DSR-Modulator kann aber nur maximal 16 Stereo-Kanäle übertragen. Durch Einsatz von MUSICAM-Codern kann die Zahl der im DSR-Signalpaket zu übertragenden Programme zwar von 16 auf bis zu 64 max. 112 erhöht werden, dafür wären aber z. B. 64 MUSICAM-Decoder und 64 MUSICAM-Coder in der Satelliten-Bodenstation zusätzlich erforderlich. Da dieses Übertragungsverfahren nur über das NF-Basisband erfolgen kann (L/R-Audio-Signal) wäre auch ein Qualitäts­ verlust unvermeidbar.In this field trial, they became the ground station of the Satellite connection transmitted, each MUSICAM-da reduced digital audio signals of the individual Pro gram provider stations using MUSICAM decoders in analog Mono or stereo audio signals converted back, then digitized again and then via the DSR modulator (Digital satellite radio, described in "News from Rohde & Schwarz ", Issue 114, Summer 1986, Pages 13 to 16) fed to the satellite transmission link. This known type of processing the DSR signal package in DSR modulator can only have a maximum of 16 stereo channels transfer. By using MUSICAM encoders, the Number of programs to be transmitted in the DSR signal package from 16 to up to 64 max. 112 be increased for that  but would be z. B. 64 MUSICAM decoders and 64 MUSICAM encoders additionally required in the satellite ground station. Since this transmission method only uses the NF baseband (L / R audio signal) would also be a quality loss inevitable.

Es ist daher Aufgabe der Erfindung, eine Anordnung dieser Art zu schaffen, die mit geringstmöglichem Geräteaufwand und ohne Qualitätsverlust die MUSICAM-codierten Signale überträgt.It is therefore an object of the invention to arrange these Art to create that with the least possible equipment and the MUSICAM-coded signals without loss of quality transmits.

Diese Aufgabe wird ausgehend von einer Anordnung laut Oberbegriff des Hauptanspruches durch dessen kennzeich­ nende Merkmale gelöst. Eine vorteilhafte Weiterbildung ergibt sich aus dem Unteranspruch.This task is based on an order Preamble of the main claim characterized by its characteristics solved. An advantageous training results from the subclaim.

Bei der erfindungsgemäßen Anordnung wird der interne DSR-Takt von 10,24 MHz bei den einzelnen Programmanbie­ ter-Stationen unmittelbar zur Synchronisation der von diesen Stationen über die Satelliten-Verbindung zu übertragenden MUSICAM-datenreduzierten digitalen Ton­ signale benutzt, diese Tonsignale werden also von den Programmanbietern alle im synchronen Takt zur Bodenstation der Satelliten-Übertragungsstrecke übertragen, auch wenn diese Programmanbieter sehr weit voneinander entfernt sind. Dazu ist nur ein kostengünstiger DSR-Empfänger bei jedem Programmanbieter erforderlich, der den über die Satelliten-Übertragungsstrecke ausgestrahlten DSR-Takt rückgewinnt und damit das datenreduzierte Tonsignal synchronisiert. Dabei ist gleichzeitig auch eine Pro­ grammrücküberwachung möglich. In der zentralen Boden­ station können dann die synchron über die einzelnen SCPC-Kanäle empfangenen datenreduzierten digitalen Tonsignale vom SCPC-Demodulator unmittelbar dem DSR-Modulator zugeführt werden, der dann in bekannter Weise das DSR-Signalpaket mit z. B. 64 einzelnen daten­ reduzierten Programmen erzeugt und über die Satelli­ ten-Übertragungsstrecke den einzelnen Sendestationen des zu versorgenden Rundfunk-Sendernetzes zuführt. Um dabei eventuelle geringfügige Laufzeitdifferenzen der synchronisierten datenreduzierten digitalen Tonsignale in den SCPS-Kanälen auszugleichen ist in der Bodenstation vorzugsweise noch ein dynamischer Zwischenspeicher vorgesehen, der solche unterschiedliche Zubringerlauf­ zeiten ausgleicht und mit dem Takt des DSR-Modulators die einzelnen digitalen Tonsignale synchron dem DSR-Mo­ dulator zuführt.In the arrangement according to the invention, the internal DSR clock of 10.24 MHz in the individual program offer ter stations for instant synchronization of to these stations via the satellite link transmitting MUSICAM data-reduced digital sound signals used, so these sound signals are from the Program providers all in synchrony with the ground station of the satellite transmission path, even if these program providers are very far apart are. This is just a low cost DSR receiver required with any program provider who has the above the satellite transmission path broadcast DSR clock recovered and thus the data-reduced audio signal synchronized. There is also a pro at the same time Gram back monitoring possible. In the central floor station can then synchronize over each SCPC channels received data-reduced digital  Sound signals from the SCPC demodulator immediately to that DSR modulator are supplied, which is then known Way the DSR signal package with z. B. 64 individual data reduced programs generated and via the Satelli ten transmission path to the individual broadcasting stations of the broadcasting network to be supplied. Around possible slight differences in maturity of the synchronized data-reduced digital audio signals Balancing in the SCPS channels is in the ground station preferably a dynamic buffer provided such different feeder run equalizes times and with the clock of the DSR modulator the individual digital audio signals in sync with the DSR-Mo feeds dulator.

Die erfindungsgemäße Anordnung eignet sich nicht nur zur Versorgung der einzelnen Stationen von Rund­ funk-Sendernetzen, sondern kann natürlich in gleicher Weise auch zur Versorgung der einzelnen Speisestellen eines Kabelnetzes benutzt werden, ebenso zur Versorgung eines DAB-Netzes (Digital Audio Broadcasting, beschrieben in "Digital Audio Broadcasting" ITU COM 89 Genf, Okt. 1989) oder aller DSR-Heimempfänger mit MUSICAM-Decoder. Es eignet sich außerdem nicht nur zur Übertragung von digitalen Tonsignalen, sondern auch zur Übertragung der Digitalsignale beliebiger anderer digitaler Dienste.The arrangement according to the invention is not only suitable to supply the individual stations of Rund radio transmitter networks, but can of course be in the same Way to supply the individual dining places a cable network are used, as well as for supply of a DAB network (Digital Audio Broadcasting, described in "Digital Audio Broadcasting" ITU COM 89 Geneva, Oct. 1989) or all DSR home receivers with MUSICAM decoder. It is also not only suitable for the transmission of digital audio signals, but also to transmit the Digital signals from any other digital services.

Die Erfindung wird im folgenden anhand schematischer Zeichnungen an einem Ausführungsbeispiel näher erläutert.The invention will now be described more schematically Drawings explained in more detail using an exemplary embodiment.

Fig. 1 zeigt den Prinzipaufbau einer DSR-Satelliten-Über­ tragungsstrecke zur Übertragung von beispielsweise 64 nach dem MUSICAM-Verfahren (Masking Universal Subband Integrated Coding And Multiplexing, beschrieben in MUSICAM, An Universal Subband Coding System Description" CCETT, IRT, Matsushita & Philips) datenreduzierten digitalen Tonsignalen von einer Bodenstation B über den Satelliten SAT zu mehreren Sendestationen S1 bis Sn eines Rundfunk-Sendernetzes, beispielsweise eines DAB-Netzes. Die Satelliten-Übertragungsstrecke arbeitet beispielsweise auf einer Trägerfrequenz von 12 GHz, mit einer Trans­ ponder-Bandbreite von beispielsweise 72 MHz und es können über sie zwei DSR-Signalpakete DSR1 und DSR2 von jeweils 14 MHz Bandbreite übertragen werden. In jedem dieser DSR-Signalpakete von 14 MHz-Bandbreite werden nach dem DSR-Verfahren beispielsweise 64 datenreduzierte digitale Tonsignale übertragen. Über die restliche Bandbreite dieser Übertragungsstrecke können nach dem sogenannten SCPC-(Single Channel Per Carrier)Verfahren mehrere SCPC-Kanäle zusätzlich übertragen werden. Fig. 1 shows the basic structure of a DSR satellite transmission link for the transmission of, for example, 64 by the MUSICAM method (Masking Universal Subband Integrated Coding And Multiplexing, described in MUSICAM, An Universal Subband Coding System Description "CCETT, IRT, Matsushita & Philips ) data-reduced digital audio signals from a ground station B via the satellite SAT to several transmission stations S1 to Sn of a radio transmitter network, for example a DAB network, for example on a carrier frequency of 12 GHz, with a trans ponder bandwidth of, for example 72 MHz and it can be used to transmit two DSR signal packets DSR1 and DSR2, each with a bandwidth of 14 MHz, 64 data-reduced digital audio signals, for example, are transmitted in each of these DSR signal packets with a bandwidth of 14 MHz using the DSR method this transmission link can be based on the so-called SCPC (Single Channel Per Carrier) method, several SCPC channels can also be transmitted.

Diese 32 SCPC-Kanäle können zur Programmzufuhr von den einzelnen beliebig über die Satellitenausleuchtzone verteilten Programmanbietern zu dem DSR-System und damit zu den einzelnen Sendestationen S1 bis Sn benutzt werden. Auch andere Programmquellen können, wenn sie MUSICAM-da­ tenreduziert und taktsynchronisiert sind, eingetastet werden (z. B. DS1/DS2 oder andere SCPC-Signalquellen). Dazu besitzt jeder einzelne Programmanbieter eine bei­ spielsweise mobile Kleinleistungs-Satelliten-Sende-Boden­ station P1 bis Pn, wie sie z. B. für den digitalen Daten- oder Telefonverkehr zwischenzeitlich üblich sind. Die in einem MUSICAM-Decoder M1 bis Mn nach dem erwähnten MUSICAM-Verfahren datenreduzierten Tonsignale jedes einzelnen Programmanbieters P1 bis Pn werden durch diese Kleinleistungs-Sender über die 12 GHz-Satelliten-Über­ tragungsstrecke zum Satelliten SAT und von dort zur Bodenstation B übertragen. Jeder Programmanbieterstation P1 bis Pn ist außerdem ein zusätzlicher DSR-Empfänger E1 bis En zugeordnet, der das von der Bodenstation B ausgestrahlte DSR-Signal (z. B. DSR1) empfängt und den dort mit übertragenen DSR-Systemtakt von 10,24 MHz rückgewinnt. Mit diesem DSR-Takt T werden in jeder Programmanbieterstation P1 bis Pn die einzelnen MUSI- CAM-Coder M1 bis Mn synchronisiert, die datenreduzierten Tonsignale werden also synchron miteinander ausgestrahlt und damit auch synchron in der Bodenstation B empfangen.These 32 SCPC channels can be used to feed the program from the individual over the satellite footprint distributed program providers to the DSR system and thus be used for the individual transmission stations S1 to Sn. Other program sources can, if they are MUSICAM-da reduced and clock-synchronized, keyed in (e.g. DS1 / DS2 or other SCPC signal sources). Each individual program provider has one of these for example, mobile low-power satellite broadcasting floor station P1 to Pn, as z. B. for digital data or Telephone traffic is now common. The in a MUSICAM decoder M1 to Mn after the mentioned MUSICAM processes data-reduced audio signals each individual program providers P1 to Pn are through this Small-power transmitter via the 12 GHz satellite transmission  transmission path to the satellite SAT and from there to Ground station B transmitted. Any program provider station P1 to Pn is also an additional DSR receiver Assigned to E1 to En, which of the ground station B broadcast DSR signal (e.g. DSR1) receives and the there with transmitted DSR system clock of 10.24 MHz recovered. With this DSR clock T will be in everyone Program provider station P1 to Pn the individual MUSI CAM encoder M1 to Mn synchronized, the data reduced Sound signals are therefore broadcast synchronously with one another and thus also received synchronously in ground station B.

Einzelheiten der Bodenstation B zeigt Fig. 2, Einzel­ heiten der jeweiligen Programmanbieter-Stationen P1 bis Pn die Fig. 3. Nach Fig. 3 wird der im DSR-Empfänger E rückgewonnene Takt T sowohl zur Synchronisation des MUSICAM-Coders als auch zur Synchronisation des nach­ geschalteten SCPC-Modulators benutzt. Gemäß Fig. 2 werden in der Bodenstation B die einzelnen SCPC-Kanäle über gesonderte SCPC-Demodulatoren D1 bis Dn demoduliert und an der MUSICAM-Schnittstelle WG1/2, (beschrieben in DAB-Eureka WG1/2 Interface for NAB 91 exhibition) als jeweils 128 kBit/s/Kanal datenreduzierte Digitalsignale dem DSR-Modulator SFP zugeführt. Da ein handelsüblicher für das ursprüngliche DSR-Verfahren entwickelter DSR-Mo­ dulator (beispielsweise DSR-Modulator SFP der Firma Rohde & Schwarz) nur zur Übertragung von 16 Eingangsprogrammen geeignet ist, durch die Datenreduktion jedoch beispiels­ weise bis zu 64 Einzelprogramme über 64 SCPC-Demodulatoren D1 bis D64 zur Verfügung stehen, ist ein zusätzlicher Multiplexer SFP-X vorgesehen, der die insgesamt 64 angebotenen Programme auf die 16 Eingänge des DSR-Modu­ lators aufteilt. Die so über das DSR-Signalpaket und die Satelliten-Übertragungsstrecke von der Bodenstation B, den Satelliten SAT zu den einzelnen Sendestationen S1 bis Sn übertragenen 64 Programme können dort dann ausgewählt und zum Endverbraucher weitergeleitet werden.Details of the ground station B are shown in FIG. 2, details of the respective program provider stations P1 to Pn in FIG. 3. According to FIG used after switched SCPC modulator. According to FIG. 2, the individual SCPC channels are demodulated in the ground station B via separate SCPC demodulators D1 to Dn and at the MUSICAM interface WG1 / 2 (described in DAB-Eureka WG1 / 2 Interface for NAB 91 exhibition) as in each case 128 kbit / s / channel data-reduced digital signals are fed to the DSR modulator SFP. Since a commercially available DSR modulator developed for the original DSR method (e.g. DSR modulator SFP from Rohde & Schwarz) is only suitable for the transmission of 16 input programs, however, data reduction means, for example, up to 64 individual programs via 64 SCPC demodulators D1 to D64 are available, an additional multiplexer SFP-X is provided, which divides the total of 64 programs on the 16 inputs of the DSR modulator. The 64 programs thus transmitted via the DSR signal packet and the satellite transmission path from the ground station B, the satellite SAT to the individual transmission stations S1 to Sn can then be selected there and forwarded to the end user.

Der Aufbau und die Wirkungsweise der MUSICAM-Coder, des SCPC-Modulators und der SCPC-Demodulatoren sind beschrie­ ben in ISO, IEC JTC1/SC2/WG11 Cometycraft 11.172; DAT-2000 Digital Audio Terminal Scientific Atlanta, Inc. Die DSR-Empfänger E werden zwischenzeitlich als Consumer-Emp­ fänger angeboten, siehe beispielsweise Funkschau 21/1992, S. 67.The structure and mode of operation of the MUSICAM encoder, the SCPC modulators and the SCPC demodulators are described ben in ISO, IEC JTC1 / SC2 / WG11 Cometycraft 11.172; DAT-2000 Digital Audio Terminal Scientific Atlanta, Inc. The DSR receivers E are now used as consumer emp offered catchers, see for example Funkschau 21/1992, P. 67.

Claims (2)

1. Anordnung zum Übertragen der digitalen Tonsignale von mehreren Programmanbieter-Stationen (P1 bis Pn) zu den einzelnen Sendestationen (S1 bis Sn) eines Rundfunk-Sendernetzes nach dem DSR-Verfahren über eine Satelliten-Übertragungsstrecke, bei der in jeder Programmanbieterstation (P1 bis Pn) die zu übertra­ genden digitalen Tonsignale mittels eines die psycho­ akustischen Phänomene des menschlichen Ohres aus­ nützenden Coder (Musicam Coder M1 bis Mn) datenredu­ ziert und über einen SCPC-Kanal der Satelliten-Über­ tragungsstrecke zu einer Bodenstation (B) übertragen und von dort als DSR-Signalpaket zu den einzelnen Sendestationen (S1 bis Sn) des Rundfunk-Sendernetzes übertragen werden, dadurch gekennzeich­ net, daß jeder Programmanbieterstation (P1 bis Pn) ein DSR-Empfänger (E1 bis En) zugeordnet ist, das damit empfangene DSR-Taktsignal (T) zur Synchro­ nisation der zu übertragenden datenreduzierten digi­ talen Tonsignale benutzt wird und in der Bodenstation (B) die so synchron übertragenen datenreduzierten digitalen Tonsignale der einzelnen SCPC-Kanäle un­ mittelbar einem DSR-Modulator (SFP) zugeführt und als DSR-Signalpaket zu den Sendestationen (S1 bis Sn) des Rundfunk-Sendernetzes übertragen werden. 1. Arrangement for transmitting the digital audio signals from several program provider stations (P1 to Pn) to the individual transmitter stations (S1 to Sn) of a radio transmitter network according to the DSR method over a satellite transmission link, in which in each program provider station (P1 to Pn) the digital audio signals to be transmitted using a coder (Musicam Coder M1 to Mn) which uses the psycho-acoustic phenomena of the human ear and uses a SCPC channel to transmit the satellite transmission path to a ground station (B) and from there are transmitted as a DSR signal packet to the individual transmitter stations (S1 to Sn) of the radio transmitter network, characterized in that each program provider station (P1 to Pn) is assigned a DSR receiver (E1 to En), the DSR clock signal thus received (T) is used for synchronization of the data-reduced digital audio signals to be transmitted and in the ground station (B) the synchronously bert ragenen data reduced digital sound signals of the individual SCPC channels un indirectly a DSR modulator (SFP) supplied and transmitted as DSR signal packet to the transmitting stations (S1 to Sn) of the broadcasting network. 2. Anordnung nach Anspruch 1, dadurch gekenn­ zeichnet, daß in der Bodenstation die einzelnen datenreduzierten digitalen Tonsignale zum Ausgleich eventueller Zubringerlaufzeiten in einem Zwischenspeicher zwischengespeichert und synchron dem DSR-Modulator (SFP) zugeführt werden.2. Arrangement according to claim 1, characterized records that in the ground station individual data-reduced digital audio signals for Compensation for possible feeder transit times in one Cached and synchronized be fed to the DSR modulator (SFP).
DE19924237366 1992-11-05 1992-11-05 Digital audio signal transmitter serving several programme- presenting stations - each allocated to DSR receiver, using received DSR clock pulse signal for synchronisation of digital audio signals Withdrawn DE4237366A1 (en)

Priority Applications (1)

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DE19924237366 DE4237366A1 (en) 1992-11-05 1992-11-05 Digital audio signal transmitter serving several programme- presenting stations - each allocated to DSR receiver, using received DSR clock pulse signal for synchronisation of digital audio signals

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DE19924237366 DE4237366A1 (en) 1992-11-05 1992-11-05 Digital audio signal transmitter serving several programme- presenting stations - each allocated to DSR receiver, using received DSR clock pulse signal for synchronisation of digital audio signals

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343629A1 (en) * 1993-12-21 1995-06-22 Grundig Emv Digital radio signal generation system for satellite communications
US6778649B2 (en) 1995-04-10 2004-08-17 Starguide Digital Networks, Inc. Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth
US7650620B2 (en) 1998-03-06 2010-01-19 Laurence A Fish Method and apparatus for push and pull distribution of multimedia
US7792068B2 (en) 1998-04-03 2010-09-07 Robert Iii Roswell Satellite receiver/router, system, and method of use
US8284774B2 (en) 1998-04-03 2012-10-09 Megawave Audio Llc Ethernet digital storage (EDS) card and satellite transmission system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343629A1 (en) * 1993-12-21 1995-06-22 Grundig Emv Digital radio signal generation system for satellite communications
US6778649B2 (en) 1995-04-10 2004-08-17 Starguide Digital Networks, Inc. Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth
US7650620B2 (en) 1998-03-06 2010-01-19 Laurence A Fish Method and apparatus for push and pull distribution of multimedia
US7792068B2 (en) 1998-04-03 2010-09-07 Robert Iii Roswell Satellite receiver/router, system, and method of use
US8284774B2 (en) 1998-04-03 2012-10-09 Megawave Audio Llc Ethernet digital storage (EDS) card and satellite transmission system
US8774082B2 (en) 1998-04-03 2014-07-08 Megawave Audio Llc Ethernet digital storage (EDS) card and satellite transmission system

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