EP1573942A1 - Systeme de distribution pour radiodiffusion par satellite - Google Patents

Systeme de distribution pour radiodiffusion par satellite

Info

Publication number
EP1573942A1
EP1573942A1 EP03799476A EP03799476A EP1573942A1 EP 1573942 A1 EP1573942 A1 EP 1573942A1 EP 03799476 A EP03799476 A EP 03799476A EP 03799476 A EP03799476 A EP 03799476A EP 1573942 A1 EP1573942 A1 EP 1573942A1
Authority
EP
European Patent Office
Prior art keywords
signals
satellite
receiver
distribution
antenna
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
EP03799476A
Other languages
German (de)
English (en)
Inventor
Herbert Hetzel
Rainer Klos
Patrick Heck
Christian Thiel
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.)
SMSC Europe GmbH
Original Assignee
Oasis SiliconSystems AG
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 DE10324122A external-priority patent/DE10324122B4/de
Application filed by Oasis SiliconSystems AG filed Critical Oasis SiliconSystems AG
Publication of EP1573942A1 publication Critical patent/EP1573942A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite

Definitions

  • the invention relates to a distribution system for satellite broadcasting and related services.
  • Receiving systems with controllable head stations bring an improvement here.
  • the desired channel is converted into an intermediate band in accordance with the channel selection of the individual subscribers, which can be transmitted via the coaxial cable.
  • the disadvantage of such a solution is the high complexity of the head-end station combined with a low one Flexibility. This means that only receivers specially designed for communication with the head-end station can be used.
  • US 6,486,907 B1 represents a simplified solution here.
  • a simplified optical distribution system is described here, in which the signals are also transmitted in the baseband without further modulation.
  • the disadvantage of this arrangement is a low transmission quality due to the optical signal transmission in the baseband.
  • the invention is based on the object of designing a distribution system for satellite broadcasting which does not have the disadvantages described above and is suitable for the simultaneous connection of a large number of subscribers with high flexibility and low costs.
  • a solution to this problem according to the invention is specified in the independent patent claims. Further developments of the invention are the subject of the dependent claims.
  • tellite broadcasting includes services such as satellite TV, satellite radio, both in analog and digital form, as well as purely digital services, such as the distribution of Internet data via satellite channels.
  • a distribution system comprises at least one satellite receiving antenna for receiving the satellite signals, at least one LNB (Low Noise Block) as a preamplifier and at least one receiver for demodulating the signals received by the antenna. Furthermore, at least one line system for distributing the signals to at least one subscriber is provided. Further components, which are essential for the function of the system but not for the invention itself, are not discussed further here.
  • LNB Low Noise Block
  • receivers are not located on the side of the subscriber, but are assigned to the satellite receiving antenna (s).
  • receivers are not understood to mean frequency converters which convert a signal into another frequency band. Rather includes the term those units which demodulate the signals and decode if necessary.
  • At least one LNB, possibly necessary frequency converter, and at least one receiver are assigned to at least one antenna together with a bus interface.
  • decoding refers to special types of coding, such as those used for the high-frequency transmission of satellite signals from the satellite to the terrestrial receiver.
  • the signals for transmission via the bus system can be re-encoded according to the bus system standard. Codings that can usually also be evaluated by audio and video devices without their own HF receiver, such as MP3 or similar standards, do not necessarily have to be decoded. In this way, signals coded in this way can be transmitted to the participants even without decoding.
  • preamplifier (8) with optional frequency converter (LNB), receiver (9) and bus interface (10) with the antenna preferably takes place.
  • LNB frequency converter
  • receiver (9) with optional frequency converter (LNB)
  • bus interface (10) with the antenna preferably takes place.
  • Components can, for example, in a single housing, preferably as is usually the case Is used according to the state of the art for LNBs, housed and mounted on the antenna.
  • antenna here refers to a reflector that is commonly used, such as a parabolic mirror.
  • a mode converter such as a horn, which is used to implement the free-space modes in line-guided modes of the electromagnetic waves, can be assigned either to the reflector or to the preamplifier. However, it is preferably assigned to the preamplifier.
  • any reflector shapes or antenna shapes can be used in the sense of the invention.
  • Active or passive array antennas can also be used according to the invention.
  • at least one LNB, possibly necessary frequency converter, and at least one receiver are integrated in one unit together with a bus interface in the antenna itself.
  • the bus system is based on electrical lines and in particular on optical fibers.
  • this can also be a narrowband radio system or a wireless LAN.
  • Such systems are currently often offered, for example, in the 13 cm band.
  • Another embodiment of the invention relates to the configuration of the bus system as a digital bus system.
  • bidirectional communication is also regularly possible. This makes it particularly easy for the participants, a to tell the speaking receiver which channel of the satellite band it is to receive and demodulate.
  • additional communication options available via the bus system. For example, other parameters such as signal quality or other information such as time can be transmitted.
  • intelligent control can be implemented with such a bus system. If, for example, two or more subscribers request the same channel, it is now possible to tell these subscribers which receiver is currently demodulating this channel or in which data stream the desired packets can be found. The multiple demodulation of the same channel by several receivers is therefore not necessary. This is particularly advantageous in the case of large systems, since it is highly likely that at least some participants will request the same channels. Thus, the number of recipients can be chosen less than the number of participants. This leads to further cost savings.
  • the bus system can be used not only for the distribution of satellite signals, but also for data transmission, such as in PC networks or for building automation.
  • at least one receiver is designed for real-time coding of the received signals in at least one digital video format.
  • digital video formats can be, for example, MPEG or formats derived therefrom or related thereto.
  • the participants are advantageously particularly inexpensive, since they only have to have standard decoders, such as MPEG decoders.
  • standard decoders such as MPEG decoders.
  • simple MPEG decoders can be used instead of the previously complex satellite receivers, which can be implemented, for example, in PCs using software or integrated in DVD players anyway. This leads to a strong cost reduction of the overall system.
  • Another embodiment of the invention provides at least one diversity unit, which filters the signal with the best quality in each case from the signals of a plurality of receivers and transmits it further to the participants.
  • the filtering can be carried out either on the basis of the demodulated signals from receivers or else on the basis of digital signals which are transmitted via a bus. It is particularly simple
  • a method according to the invention comprises the steps: satellite broadcast signals comprising the following steps: reception of the satellite signals by means of at least one satellite antenna, demodulation of the received signals, conversion of the signals into a digital one
  • Bus system with a bus interface integrated in the antenna and distribution of the demodulated signals via a line system to at least one subscriber.
  • Fig. 1 shows schematically a device according to the invention in general form.
  • Fig. 2 shows in general form schematically the structure of a receiving unit (3).
  • 3 shows a receiving unit with several receivers.
  • the distribution system shown here has a satellite receiving antenna (1) for receiving the satellite signals.
  • This antenna comprises at least one reflector (2).
  • the receiver (3) which contains all the components necessary for tapping the signals concentrated by the reflector, their implementation and delivery as digital signals on the bus system (5). These are, for example, mode converters (7), preamplifiers (8) and receivers (9). The signals received and demodulated in the receiving unit are converted into a suitable digital form, which can be transmitted to the individual subscribers (6a, 6b, 6c, 6d, 6e) via the bus system (5). With this arrangement, the receiver is not located on the side of the participants, but in the immediate vicinity of the satellite receiving antenna.
  • a receiving unit is shown schematically in FIG. 3.
  • a mode converter (7) for example a horn antenna, picks up the electromagnetic waves concentrated by the reflector (2) and converts these waves to the line. These are then amplified by a preamplifier (8) and demodulated by a subsequent receiver (9) and decoded if necessary.
  • a bus interface (10) is provided for communication between the receiver and the participants by means of the bus system (5). This bus interface can optionally also be designed bidirectionally, so that it can not only send signals to the bus, but also receive signals from the bus. In this way, for example, certain operating states, such as the selection or the blocking of certain channels, can also be signaled to the receiving unit.
  • Fig. 3 shows schematically the exemplary embodiment with two receivers.
  • the mode converters (7, 17) which emit electrical signals to the preamplifiers (8, 18).
  • the amplified signals are then fed to the corresponding receivers (9, 19) for demodulation.
  • the received signals are now connected to the (external) bus interface (10) by means of the local bus interfaces (11, 20).
  • This bus can be, for example, a synchronous, multimedia-capable bus, such as the MediaLB.
  • Self It is understandable that other receivers can also be combined with one another in accordance with this exemplary embodiment.
  • a combination is also possible in accordance with the prior art, for example via multiplexers (channel switches). However, the combination shown here is much more flexible and powerful via a local bus.
  • the bus system (5) can of course also be used instead of the local bus.

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Radio Relay Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

L'invention concerne un système de distribution pour radiodiffusion par satellite, qui comprend une antenne de réception satellite, destinée à recevoir les signaux provenant d'un satellite, des récepteurs servant à la démodulation des signaux reçus par l'antenne, et un système de lignes, servant à la distribution des signaux à plusieurs abonnés. Les récepteurs sont placés spatialement à proximité de l'antenne de réception satellite et seuls des signaux démodulés ou décodés sont transmis aux abonnés par l'intermédiaire du système de lignes.
EP03799476A 2002-12-12 2003-12-12 Systeme de distribution pour radiodiffusion par satellite Ceased EP1573942A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10258331 2002-12-12
DE10258331 2002-12-12
DE10324122A DE10324122B4 (de) 2003-05-26 2003-05-26 Distributionssystem für Satellitenrundfunk
DE10324122 2003-05-26
PCT/EP2003/014114 WO2004054143A1 (fr) 2002-12-12 2003-12-12 Systeme de distribution pour radiodiffusion par satellite

Publications (1)

Publication Number Publication Date
EP1573942A1 true EP1573942A1 (fr) 2005-09-14

Family

ID=32509754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03799476A Ceased EP1573942A1 (fr) 2002-12-12 2003-12-12 Systeme de distribution pour radiodiffusion par satellite

Country Status (5)

Country Link
US (1) US7502588B2 (fr)
EP (1) EP1573942A1 (fr)
JP (1) JP2006510331A (fr)
AU (1) AU2003299305A1 (fr)
WO (1) WO2004054143A1 (fr)

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US20020154055A1 (en) * 2001-04-18 2002-10-24 Robert Davis LAN based satellite antenna/satellite multiswitch
US7954127B2 (en) * 2002-09-25 2011-05-31 The Directv Group, Inc. Direct broadcast signal distribution methods
US8621525B2 (en) * 2005-04-01 2013-12-31 The Directv Group, Inc. Signal injection via power supply
US7900230B2 (en) * 2005-04-01 2011-03-01 The Directv Group, Inc. Intelligent two-way switching network
US7945932B2 (en) * 2005-04-01 2011-05-17 The Directv Group, Inc. Narrow bandwidth signal delivery system
US7950038B2 (en) * 2005-04-01 2011-05-24 The Directv Group, Inc. Transponder tuning and mapping
US8024759B2 (en) * 2005-04-01 2011-09-20 The Directv Group, Inc. Backwards-compatible frequency translation module for satellite video delivery
US7958531B2 (en) 2005-04-01 2011-06-07 The Directv Group, Inc. Automatic level control for incoming signals of different signal strengths
US8549565B2 (en) 2005-04-01 2013-10-01 The Directv Group, Inc. Power balancing signal combiner
US7987486B2 (en) * 2005-04-01 2011-07-26 The Directv Group, Inc. System architecture for control and signal distribution on coaxial cable
US20080016535A1 (en) * 2005-09-02 2008-01-17 The Directv Group, Inc. Frequency shift key control in video delivery systems
US8789115B2 (en) * 2005-09-02 2014-07-22 The Directv Group, Inc. Frequency translation module discovery and configuration
US7937732B2 (en) * 2005-09-02 2011-05-03 The Directv Group, Inc. Network fraud prevention via registration and verification
US7991348B2 (en) * 2005-10-12 2011-08-02 The Directv Group, Inc. Triple band combining approach to satellite signal distribution
US8019275B2 (en) * 2005-10-12 2011-09-13 The Directv Group, Inc. Band upconverter approach to KA/KU signal distribution
US20070089142A1 (en) * 2005-10-14 2007-04-19 John Norin Band converter approach to Ka/Ku signal distribution
WO2007096617A2 (fr) * 2006-02-22 2007-08-30 Invacom Ltd Distribution de signaux de donnees provenant de moyens de reception de donnees de diffusion generale
KR101316166B1 (ko) * 2006-06-09 2013-10-08 더 디렉티브 그룹, 인크. 다양한 포맷 비트 스트림들을 위한 프리젠테이션 모드들
MX2008015659A (es) * 2006-06-16 2009-03-09 Directv Group Inc Comando de medio de almacenamiento digital e indexacion de datos de control.
KR101462533B1 (ko) * 2006-10-13 2014-11-17 한국전자통신연구원 멀티홉 릴레이 시스템에서 직접 중계 영역을 이용한중계국의 중계 방법 및 그 시스템
US8719875B2 (en) 2006-11-06 2014-05-06 The Directv Group, Inc. Satellite television IP bitstream generator receiving unit
US8712318B2 (en) 2007-05-29 2014-04-29 The Directv Group, Inc. Integrated multi-sat LNB and frequency translation module
US8238813B1 (en) 2007-08-20 2012-08-07 The Directv Group, Inc. Computationally efficient design for broadcast satellite single wire and/or direct demod interface
US9942618B2 (en) * 2007-10-31 2018-04-10 The Directv Group, Inc. SMATV headend using IP transport stream input and method for operating the same
WO2010080823A1 (fr) 2009-01-06 2010-07-15 The Directv Group, Inc. Estimation de la dérive de fréquence pour une unité d'extérieur à faible coût
JP2011254187A (ja) * 2010-06-01 2011-12-15 Funai Electric Co Ltd ネットワークシステム
DE102012003966B4 (de) * 2012-02-29 2015-11-05 Kathrein-Werke Kg Speisesystem insbesondere zum Empfang von über Satellit ausgestrahlten Fernseh- und/oder Rundfunkprogrammen
DE202013006660U1 (de) 2013-07-24 2014-10-28 Kathrein-Werke Kg Speisesystem insbesondere zum Empfang von über Satellit ausgestrahlten Fernseh- und/oder Rundfunkprogrammen
KR102165085B1 (ko) * 2015-04-30 2020-10-13 주식회사 쏠리드 위성 신호 중계 시스템

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Also Published As

Publication number Publication date
AU2003299305A1 (en) 2004-06-30
US7502588B2 (en) 2009-03-10
JP2006510331A (ja) 2006-03-23
WO2004054143A1 (fr) 2004-06-24
US20060030259A1 (en) 2006-02-09

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