EP3461037A1 - Récepteur de signaux de radiodiffusion par satellite et procédé de fonctionnement - Google Patents

Récepteur de signaux de radiodiffusion par satellite et procédé de fonctionnement Download PDF

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Publication number
EP3461037A1
EP3461037A1 EP17192443.4A EP17192443A EP3461037A1 EP 3461037 A1 EP3461037 A1 EP 3461037A1 EP 17192443 A EP17192443 A EP 17192443A EP 3461037 A1 EP3461037 A1 EP 3461037A1
Authority
EP
European Patent Office
Prior art keywords
satellite dish
control signal
connection
receiver
satellite
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Withdrawn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
EP17192443.4A
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German (de)
English (en)
Inventor
Alp KIRAZ
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.)
Vestel Elektronik Sanayi ve Ticaret AS
Original Assignee
Vestel Elektronik Sanayi ve Ticaret AS
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 Vestel Elektronik Sanayi ve Ticaret AS filed Critical Vestel Elektronik Sanayi ve Ticaret AS
Priority to EP17192443.4A priority Critical patent/EP3461037A1/fr
Priority to TR2017/16875A priority patent/TR201716875A2/tr
Publication of EP3461037A1 publication Critical patent/EP3461037A1/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the present disclosure relates to a satellite broadcast signal receiver and a method of operating a satellite broadcast signal receiver.
  • a satellite broadcast signal receiver is connected in use to a satellite dish in order to receive signals broadcast by a satellite, typically for receiving television and/or radio channels.
  • the receiver sends control signals to the satellite dish as required in order to reconfigure the satellite dish to select a desired channel that can be received by the satellite dish.
  • problems can arise if more than one receiver is connected to the same satellite dish.
  • a satellite broadcast signal receiver comprising:
  • the detector may be provided for example as part of the receiver or as a separate device which can be connected to the receiver in use.
  • the receiver may be provided as a component of for example a television or video recorder or the like or as a stand-alone unit, such as a set-top box or card for use in a computer or the like.
  • the receiver is arranged to output a warning to a user if the presence of a different control signal on a said connection to a said satellite dish is detected.
  • the warning may be for example an audio warning and/or a visual warning, which is displayed on a display device associated with the receiver.
  • the receiver has non-volatile data storage and is arranged to arranged to store in the non-volatile data storage an indication that the presence of a different control signal on a said connection to a said satellite dish has been detected.
  • the controller is arranged to send a control signal to a said satellite dish regardless of whether or not a different control signal on a said connection to a said satellite dish is detected.
  • the receiver may be designed to be a "master" and so always sends a control signal regardless.
  • the controller is arranged not to send a control signal to a said satellite dish if a different control signal on a said connection to a said satellite dish is detected.
  • the receiver may be designed to be an "auxiliary" and so does not send a control signal if a different control signal is present on the connection.
  • the controller is selectively configurable so that the controller can be selectively arranged to send a control signal to a said satellite dish regardless of whether or not a different control signal on a said connection to a said satellite dish is detected or not to send a control signal to a said satellite dish if a different control signal on a said connection to a said satellite dish is detected.
  • the setting of the receiver as a master or as an auxiliary may be a setting that is freely settable by the user for example.
  • the controller is arranged to output a control signal that has different voltages for different polarisations of broadcast signals that are capable of being received at a satellite dish to which the receiver is connected in use.
  • the controller may for example want to select a first polarisation and would normally therefore transmit a control signal having a corresponding first voltage to the satellite dish.
  • the detector in such a case is capable of detecting that a different (second) voltage is present on the connection between the receiver and the satellite dish.
  • a 13V signal may be output to the satellite dish to select a vertical or right hand circular polarisation for the broadcast signal that is received at the satellite dish
  • an 18V signal may be output to the satellite dish to select a horizontal or left hand circular polarisation for the broadcast signal that is received at the satellite dish.
  • the controller is arranged to output a control signal that has a tone signal having a particular frequency to select a particular frequency band that is received at said satellite dish in use.
  • the controller may output a control signal that has a tone signal having the particular frequency to select the particular frequency band that is received at the satellite dish in use and may output a control signal having no tone signal, or a tone signal having a different frequency, to select a different frequency band that is received at the satellite dish in use.
  • a satellite broadcast signal receiver which is connected to a satellite dish via a connection, the method comprising:
  • the method comprises outputting a warning to a user if the presence of a different control signal on the connection to the satellite dish is detected.
  • the method comprises storing in non-volatile data storage an indication that the presence of a different control signal on the connection to the satellite dish has been detected.
  • FIG. 1 this shows schematically an example of two satellite broadcast signal receivers 10 connected to a satellite dish 20.
  • the satellite broadcast signal receivers 10 may be for example televisions, set-top boxes, PVR (personal video recorder), an expansion card for a computer, etc., and may in general be the same type of device or different devices.
  • the satellite broadcast signal receivers 10 have one or more processors 11, non-volatile data storage 12 for storing data, etc.
  • Each satellite broadcast signal receiver 10 is connected to the satellite dish 20 by a wired connection 30, which is partially shared.
  • a wired connection 30 is partially shared.
  • the cables 30, 31, 32 are typically coaxial cables.
  • the satellite dish 20 has a parabolic reflector 21 which focusses signals received from a broadcasting satellite (not shown) to a so-called LNB (low-noise block downconverter) 22.
  • the LNB 22 is located at the focal point of the parabolic reflector 21, or at least as close to the focal point as is practical.
  • An LNB 22 is typically in effect a combination of a low-noise amplifier, a frequency mixer, a local oscillator and an intermediate frequency (IF) amplifier.
  • the LNB 22 receives the (microwave) signal transmitted by the broadcasting satellite and collected by the satellite dish, amplifies it, and down converts the block of frequencies to a lower block of intermediate frequencies (IF).
  • the down conversion at the LNB 22 permits the use of relatively inexpensive coaxial cable to connect the LNB 22 to the satellite broadcast signal receivers 10.
  • the cables 30, 31, 32, 33 are connected to the LNB 22.
  • the broadcast signals transmitted by the satellite for receipt by satellite dishes 20 are typically in one or more specific frequency bands and may use a specific polarisation.
  • the frequencies currently used by digital broadcast satellite services are 10.7-12.75 GHz on two polarisations H (Horizontal) and V (Vertical). This range is divided into a "low band” with 10.7-11.7 GHz and a "high band” with 11.7-12.75 GHz. This results in two frequency bands, each with a bandwidth of about 1 GHz, each with two possible polarisations.
  • these bands are down converted to 950-2150 MHz, which is the frequency range allocated for the satellite service on the coaxial cable between LNB 22 and the receiver 10. Numerous individual channels (i.e. television and/or radio channels) are transmitted within each band and having one polarisation or the other.
  • FIG. 2 shows schematically an example of some further components of the satellite broadcast signal receivers 10.
  • the receiver 10 has an antenna socket 13 to which the cable 30, 33 to the satellite dish 20 is connected.
  • the down converted IF signal from the satellite dish 20 is passed to a tuner block 14.
  • the tuner block 14 selects the channel desired by the user by filtering that channel from the multiple channels received in the signal carried by the cable 30, 33 from the satellite dish 20, converts the channel signal to a lower intermediate frequency, and decrypts the signal if the received signal is encrypted.
  • a demodulator block 15 demodulates the channel signal and sends the resulting video and/or audio signal to the main processor 16 of the receiver 10, which sends the video and/or audio signal to the display device/speakers 17 for play back.
  • the display device/speakers may be part of the receiver 10 in the case that the receiver 10 is for example a television, or may be separate components in the case that the receiver 10 is for example a set-top box or a computer expansion card, etc.
  • the receiver 10 transmits a control signal to the LNB 22 to cause the LNB 22 to receive and process the correct corresponding signal that is broadcast by the satellite.
  • the control signal may cause the LNB 22 to receive and process the corresponding band (high or low) having the corresponding polarisation (horizontal or vertical) that is broadcast by the satellite.
  • the United Kingdom television channel BBC One HD is (currently) broadcast with a frequency of 10,847 GHz and vertical polarisation. Accordingly, to enable the user to watch BBC One HD, a control signal is sent by the receiver 10 to the LNB 22 to instruct the LNB 22 to tune to the low frequency band with vertical polarisation.
  • a voltage of 13V may be transmitted to select a vertical polarisation and a voltage of 18V may be transmitted to select a horizontal polarisation; and a "tone signal" of 22kHz may be transmitted to select the high frequency band, the absence of a tone signal being taken by the LNB 22 as selection of the low frequency band.
  • problems can arise if one receiver 10 attempts to send a control signal of one type (e.g. having the low selection voltage (13V) to select the vertical polarisation and having the tone signal (of 22kHz) to select the high frequency band) whilst another receiver attempts to a control signal of a different type (e.g. having the high selection voltage (18V) to select the horizontal polarisation and not having a tone signal to select the low frequency band).
  • a control signal of one type e.g. having the low selection voltage (13V) to select the vertical polarisation and having the tone signal (of 22kHz) to select the high frequency band
  • a control signal of a different type e.g. having the high selection voltage (18V) to select the horizontal polarisation and not having a tone signal to select the low frequency band.
  • one or both (or all) of the receivers 10 may be damaged and in any event abnormal operation may occur, meaning at least that the user is not presented with the desired TV channel, and it is not immediately obvious to the user why this has occurred.
  • a warning may be caused to be output to a user to the effect that a different control signal is present.
  • a warning may be caused to be displayed on the display device 17 of the receiver 10 that has a different control signal to send. That warning may include functionality that asks the user whether or not they want to proceed, enabling the user to select an option to proceed regardless or to cancel the request to retune.
  • an indication of the presence of a different control signal on the connection to the LNB 22 may alternatively or additionally be recorded in the non-volatile data storage 12 of the receiver 10 that has a different control signal to send. This can be used for future diagnostic purposes, for example if the receiver 10 concerned develops a fault.
  • a particular receiver 10 may be designated as a "master" or as an "auxiliary" device. This designation of the receivers 10 may be provided as an option for the user, by for example software running on the main processor 16 of the receiver 10.
  • the control signal to select a different band and/or polarisation is sent to the LNB 22 regardless of whether or not a different control signal is present on the connection to the LNB 22.
  • a control signal to select a different band and/or polarisation is not sent to the LNB 22 if a different control signal is present on the connection to the LNB 22.
  • a particular receiver 10 is designated as an auxiliary and a different control signal is present on the connection to the LNB 22, then the user may be provided with an option (for example, displayed on a display device associated with the receiver 10) to cause the new control signal to be sent to the LNB 22, effectively to override the different control signal that was present on the connection.
  • the user may be provided with an option (for example, displayed on a display device associated with the receiver 10) to cause the control signal to be sent to the LNB 22 again.
  • this shows schematically a detector block 40 for detecting the presence of a control signal on the connection between the receiver 10 and the LNB 22.
  • the detector block 40 may be provided as a separate device or may be provided integrally with the receiver 10.
  • the detector block 40 has an input connection at a location between the tuner block 14 and the antenna socket 13 of the receiver 10, to which the cable 30 to the satellite dish 20 is connected.
  • the input connection of the detector block 40 may be such that the detector block 40 is effectively isolated from the cable 30. This may be achieved by for example connecting the detector block 40 to the cable 30 using a signal splitter or a switch 50.
  • the output of the detector block 40 in this example is provided to a controller port of the main processor 16 of the receiver 10.
  • the main processor 16 of the receiver 10 may have an ADC (analogue-to-digital converter) input to convert an analogue output of the detector block 40 to a digital signal which can be processed by the main processor 16 of the receiver 10.
  • the main processor 16 of the receiver 10 may operate a routine such that the input to the or each controller port of the receiver 10 is checked, for example continuously or whenever a channel selection is made by a user. If the current channel selection by a user results in a control signal that is different from a current control signal on the cable 30 as detected by the detector block 40, then one or more actions may be carried out, as indicated above.
  • single cable distribution is known (sometimes known by the name “unicable”) which enables the delivery of broadcast programming to multiple receivers (typically for multiple users) over a single coaxial cable.
  • the receiver 10 may be provided with a functionality that enables the user(s) to disable the use of the detection as described herein for such cases.
  • processor or processing system or circuitry referred to herein may in practice be provided by a single chip or integrated circuit or plural chips or integrated circuits, optionally provided as a chipset, an application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), digital signal processor (DSP), graphics processing units (GPUs), etc.
  • the chip or chips may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry, which are configurable so as to operate in accordance with the exemplary embodiments.
  • the exemplary embodiments may be implemented at least in part by computer software stored in (non-transitory) memory and executable by the processor, or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • the invention also extends to computer programs, particularly computer programs on or in a carrier, adapted for putting the invention into practice.
  • the program may be in the form of non-transitory source code, object code, a code intermediate source and object code such as in partially compiled form, or in any other non-transitory form suitable for use in the implementation of processes according to the invention.
  • the carrier may be any entity or device capable of carrying the program.
  • the carrier may comprise a storage medium, such as a solid-state drive (SSD) or other semiconductor-based RAM; a ROM, for example a CD ROM or a semiconductor ROM; a magnetic recording medium, for example a floppy disk or hard disk; optical memory devices in general; etc.
  • SSD solid-state drive
  • ROM read-only memory
  • magnetic recording medium for example a floppy disk or hard disk
  • optical memory devices in general etc.

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  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Circuits Of Receivers In General (AREA)
EP17192443.4A 2017-09-21 2017-09-21 Récepteur de signaux de radiodiffusion par satellite et procédé de fonctionnement Withdrawn EP3461037A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17192443.4A EP3461037A1 (fr) 2017-09-21 2017-09-21 Récepteur de signaux de radiodiffusion par satellite et procédé de fonctionnement
TR2017/16875A TR201716875A2 (tr) 2017-09-21 2017-10-31 Uydu yayin si̇nyali̇ alicisi ve çalişma yöntemi̇

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17192443.4A EP3461037A1 (fr) 2017-09-21 2017-09-21 Récepteur de signaux de radiodiffusion par satellite et procédé de fonctionnement

Publications (1)

Publication Number Publication Date
EP3461037A1 true EP3461037A1 (fr) 2019-03-27

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EP17192443.4A Withdrawn EP3461037A1 (fr) 2017-09-21 2017-09-21 Récepteur de signaux de radiodiffusion par satellite et procédé de fonctionnement

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EP (1) EP3461037A1 (fr)
TR (1) TR201716875A2 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010036223A1 (fr) * 2008-09-26 2010-04-01 Thomson Licensing Procédé de commande de transmission de signaux pour dispositifs multiples

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010036223A1 (fr) * 2008-09-26 2010-04-01 Thomson Licensing Procédé de commande de transmission de signaux pour dispositifs multiples

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TR201716875A2 (tr) 2019-04-22

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