WO2009150135A1 - Module servant à la réception d’un signal vidéo et/ou audio numérique et système correspondant - Google Patents

Module servant à la réception d’un signal vidéo et/ou audio numérique et système correspondant Download PDF

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Publication number
WO2009150135A1
WO2009150135A1 PCT/EP2009/057057 EP2009057057W WO2009150135A1 WO 2009150135 A1 WO2009150135 A1 WO 2009150135A1 EP 2009057057 W EP2009057057 W EP 2009057057W WO 2009150135 A1 WO2009150135 A1 WO 2009150135A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
dvb
tuner
demodulator
module
Prior art date
Application number
PCT/EP2009/057057
Other languages
English (en)
Inventor
Carole Le Goff
Philippe Lepoil
Marc Louchkoff
Jean-Marc Le Foulgoc
Original Assignee
Thomson Licensing
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 Thomson Licensing filed Critical Thomson Licensing
Publication of WO2009150135A1 publication Critical patent/WO2009150135A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4183—External card to be used in combination with the client device, e.g. for conditional access providing its own processing capabilities, e.g. external module for video decoding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers

Definitions

  • the present invention relates to the reception of digital audio/video streams and more specifically to the adaptation of an audio/video decoder to receive additional streams.
  • Decoder 1 (or set-top-box) is adapted to receive one or more audio/video streams broadcast via satellite, cable or radio channel.
  • Figure 1 shows such a decoder 1 adapted to receive simultaneously two terrestrial digital television streams (or DVB-T "Digital Video Broadcast-Terrestrial"). Decoder 1 comprises:
  • a high-pass filter 1 1 or a band-pass filter having as input the received RF signal 101 and providing at output a filtered RF signal 12 corresponding to a useful signal carrying audio and/or video streams,
  • a DVB-T tuner (or synthesiser)/demodulator 150 having at input the signal 12 and providing at output a TS (transport stream) 160 and a signal 141 that is a replica of the signal 140
  • a DVB-T tuner/demodulator 151 having at input the signal 141 and providing at output a TS stream 161 ,
  • the CPU 17 controls the tuners/demodulators 150 and 151 via respectively the series links I 2 C 162 and 163.
  • the decoders of the prior art present the inconvenience of being difficult to upgrade. Particularly, if the user wants to receive an additional TS stream, a card must be replaced or an additional card must be added inside the decoder which generally leads to a return to the after-sales service.
  • the purpose of the invention is to facilitate the upgrading of the audio and/or video decoder.
  • the invention proposes a module for the reception of a digital audio and/or video signal.
  • the module comprises:
  • the first tuner/demodulator receiving the filtered incoming signal, the first tuner/demodulator being adapted to provide audio/video data to the first interface for digital data from the filtered incoming signal.
  • the module comprises a box and the first digital data interface and the first connector are integral to the box.
  • the first interface and the first connector are places on the same side of the reception module.
  • the reception module has a greater height than depth and the first connector and the first interface are on the largest side.
  • said at least first tuner/demodulator is adapted to receive and demodulate a signal compatible with a signal belonging to the group comprising:
  • DVD-C a cable video digital broadcast signal
  • the module comprises at least two fixation clips.
  • the invention also relates to a system for reception of a digital audio and/or video signal, comprising the reception module and a decoder.
  • the decoder comprises: means for video processing, at least a second tuner/demodulator receiving an incoming signal and adapted to provide a video transport stream to the video processing means, a second digital data interface connected to the video processing means and adapted to a connection with said first interface, a second input connector connected to the second tuner/demodulator, an output connector, - a filter receiving an input signal from the second input connector and providing a filtered signal, the filter output being connected to the output connector and to said at least second tuner/demodulator.
  • the system comprises a splitter at the filter output and in that a first output is connected to at least a second tuner/demodulator and in that a second output is connected to the output connector.
  • At least a second tuner demodulator relays a filtered incoming signal to the output connector.
  • the second tuner(s)/demodulator(s) are adapted to receive and demodulate a signal compatible with a signal belonging to a group comprising:
  • the second tuner(s)/demodulator(s) are adapted to receive and demodulate a signal (DVB-T, DVB-S) of a different nature to the signal (DVB-T2, DVB-S2) received via said at least first tuner/demodulator.
  • FIG. 1 shows an audio and/or video decoder known in the art
  • FIG. 2 presents a broadcast network implementing a system comprising an audio and/or video reception module according to a particular embodiment of the invention
  • - Figure 3 is a diagrammatical block diagram of the system present in figure 2
  • FIG. 5 and 6 present a rear view of the system of figure 2 with the module respectively connected and not connected to a decoder
  • the DVB-T signals are compatible with the ETSI reference standard EN300744.
  • the DVB-T2 signals are compatible with the corresponding standard currently being finalized. They are specifically described on the Internet site www.dvb.org.
  • the system 23 comprises a decoder 230 and a module 231 according to the invention.
  • the module 231 is connected to the decoder 230 via RF connectors and a digital data transmission and reception link that are described later.
  • the decoder 230 receives RF signals transmitted by transmitters 20 and 21 via an antenna (local antenna connected directly to the decoder 230 or remote antenna connected to the decoder via a cable).
  • the decoder 230 is connected to peripheral devices, for example to a television 240, an external recorder 241 , an audio amplifier 242 connected to acoustic speakers 2420 and 2421.
  • a single transmitter broadcasts both the DVB-T and DVB-T2 signals.
  • Figure 3 presents a diagrammatic view of the system 23 implemented in the form of an audio and/or video reception system 3.
  • the system 3 comprises a decoder 30 and a module 31 according to the invention connected together by connectors RF 303 and 310 and USB (Universal Serial Bus) connectors 306 and 313.
  • RF 303 and 310 USB (Universal Serial Bus) connectors 306 and 313.
  • USB Universal Serial Bus
  • the decoder 30 comprises elements similar to the decoder 1 that has the same references.
  • the decoder 30 comprises: - an input connector, RFin 100 of a received RF signal 308 corresponding to the combination of signals broadcast respectively by the transmitters 20 and 21 , the connector 100 being of IEC 169-2 socket type with an impedance of 75 ⁇ , - a high-pass filter 1 1 or a band-pass filter having as input the received RF signal 308 and providing at output a filtered RF signal 309 corresponding to a useful signal carrying audio and/or video streams transmitted by the transmitters 20 and 21 , - A low noise amplifier LNA 13 of 3dB having at input the filtered
  • an RF splitter receiving the signal 310 at input and providing at output filtered and amplified signals 301 and 302 corresponding to the signal 310, the LNA 13 compensating the loss due to the splitter 310,
  • a DVB-T tuner (or synthesiser)/demodulator 150 having at input the signal 301 and providing at output a TS (transport stream) 160 and a signal 141 that is a replica (loop-through) of the signal 301 ,
  • a DVB-T tuner/demodulator 151 having at input the signal 141 and providing at output a TS stream 161 ,
  • USB 3010 connected to the USB 306 connector to exchange a signal 307
  • I/F interfaces adapted for example, to communicate with a television, a remote control, recording devices
  • memories 181 for example hard disk, RAM,
  • ROM Read Only Memory
  • Flash card memory card
  • the CPU 305 controls the tuners/demodulators 150 and 151 via respectively the series links I 2 C 162 and 163. According to a variant of the invention, one of the tuners 150 or
  • the module 31 comprises:
  • RFin 310 adapted to receive, when connected to the connector 303, a filtered RF signal 316 provided by the connector 303, the connector 310 being of IEC
  • FIG. 4 shows the module 31 in more detail.
  • the tuner/demodulator DVB-T2 31 1 comprises:
  • a tuner 31 10 receiving from the connector 310 the filtered RF signal 316 and transposing it into an intermediary frequency band Fl 31 13 (for example at 36 MHz), and
  • a demodulator DVB-T2 31 16 demodulating the signal 31 13 by generating the stream TS 314.
  • the tuner 3310 transposes the filtered RF signal 316 into a base band according to the frequency desired.
  • the tuner 31 10 possesses its own I 2 C address and receives control data 31 14 transmitted by the CPU 305 via the bus 315.
  • This control data 31 14 comprises for example information representative of the frequency band desired (typically the frequency band corresponding to the TS stream desired, this band being a DVB-T2 band), the bandwidth desired (for example 6, 7 or 8 MHz).
  • the tuner 31 10 positions a signal transposition to the frequency Fl (or in base band according to one variant) and a band-pass filter according to the bandwidth desired the filter the transposed signal.
  • the tuner 3310 amplifies the transposed then filtered signal with an AGC according to an AGC command 31 15 received from the demodulator 31 16.
  • the tuner 3310 provides the demodulator 31 16 with the signal in intermediary band after these transposition, filtering and AGC operations.
  • the tuner 31 10 also provides a reference clock 31 12 to the demodulator 31 16.
  • the demodulator 31 16 possesses its own I 2 C address and receives control data 31 14 transmitted by the CPU 305 via the bus 315. It relays the I 2 C data from or to the connector 313 to or from the tuner 31 10. It generates locally and/or according to the control data received from the bus 315, the AGC (Automatic Gain Control) signal 31 15 that it transmits to the tuner 31 10.
  • the AGC Automatic Gain Control
  • the demodulator 31 16 is adapted to demodulate the DVB-T2 signal and in particular, it demodulates the signal 31 13 that it receives according to modulation parameters specific to this signal (notably OFDM modulation associated with QPSK or QAM modulation), FFT (Fast Fourier Transform) size, etc.
  • the demodulator transmits and receives the I2C commands linked to the robustness linked to the radio reception channel (noise and echoes).
  • FIG 5 shows a rear view of the decoder 30 to which is connected the module 31 according to a particular embodiment of the invention.
  • the module 31 is adapted to be connected outside the decoder 30 and extends perpendicularly to the rear side of the decoder 30.
  • the module 31 comprises a connection side comprising connectors 310 and 313 and soft clips 318 and 319 diametrically opposed on the connection side.
  • the decoder 30 comprises fixation holes 308 and 319 adapted to receive the clips 318 and 319, which enables the module 31 to be more solidly maintained on the decoder 30.
  • Figure 6 shows the same elements before connection.
  • Figure 7 shows the exterior perspective views of module 31.
  • the module 31 does not have clips, its maintenance being assured by the connectors 313 and 310.
  • Figures 8 to 10 present a module 8 according to a variant of the invention, adapted to be connected to the decoder 30 and in L form.
  • the RF and electronic elements of module 8 correspond to the decoder 31 shown with respect to figure 4.
  • Figure 8 shows a rear view of the decoder 30 to which is connected the module 8 according to a particular embodiment.
  • the module 31 extends in parallel to the rear side of the decoder 30. Hence the size of the module 31 is reduced.
  • Figures 9 and 10 show respectively a cross-section according to a side view and front view of the module 8.
  • the module 8 comprises a connection side comprising:
  • USB 83 intended for connection to connector 306 of the decoder 30 to exchange digital data with CPU 305
  • the module 8 comprises an electronic card PCB 81 comprising a shielded tuner 82 (corresponding to the tuner 31 10) and one or more components corresponding to the demodulator 31 16 and the bridge 31 12 as well as the links required for the correct operation of the module 8.
  • the card comprises an electronic card PCB 81 comprising a shielded tuner 82 (corresponding to the tuner 31 10) and one or more components corresponding to the demodulator 31 16 and the bridge 31 12 as well as the links required for the correct operation of the module 8.
  • the connector 80 extends to the height h of the module 8.
  • the connector 80 is perpendicular to the card 81 and is fixed to the card 81.
  • the connector 83 is also perpendicular to the card 81.
  • the card 81 , the connectors 83 and 80 are integral to a shell 84.
  • the shell 84 has a height h greater than its depth p.
  • the size of the card 81 is reduced for example, by reduction in the number of components, supehmposition of components, or superimposition of two or more cards assuring the same function of card 81.
  • the height h is less than or equal to the height h of the decoder 30.
  • the module 8 has no clips, its maintenance being assured by the connectors 80 and 83.
  • the network comprises a transmitter DVB-T (respectively DVB-T2); according to this variant, the module and the decoder are of DVB-T type (respectively DVB- T2); the connection of the module to a decoder enables an additional TS stream to be obtained.
  • DVB-T transmitter DVB-T
  • the module and the decoder are of DVB-T type (respectively DVB- T2); the connection of the module to a decoder enables an additional TS stream to be obtained.
  • the invention also applies to wired networks according to the DVB-C standard defined in the document ETSI EN300429.
  • the decoder is a DVB-C decoder and the additional module comprises a DVB-C tuner/demodulator.
  • the additional module comprises a DVB-C tuner/demodulator.
  • the decoder is a DVB-S decoder and the additional module comprises a DVB-S2 tuner/demodulator.
  • the decoder advantageously implements an LNA and a splitter and the module tuner carries out a transposition of the filtered incoming signal into a base band.
  • Different combinations of the decoder and module are possible: for example decoder DVB-S and/or DVB- S2 with module DVB-S or DVB-S2.
  • the module comprises more than one tuner/demodulator receiving the filtered incoming signal of an input connector.
  • the filtered incoming signal can be distributed to different tuners/demodulators with one or more splitters and/or systems (a tuner relaying the filtered signal at input to the input of another tuner).
  • the corresponding demodulators are connected to one or more bridges via a digital data link to exchange demodulated audio/video data with a decoder via advantageously a digital connection or according to a variant, via a digital connection associated with each demodulator.
  • the demodulator(s) of the module directly provide the data compatible with the format of the digital link.
  • This embodiment does not require the implementation of a bridge.
  • the digital link between the module and the decoder is not restricted to the use of a USB connector.
  • the invention is also compatible with any type of link between the decoder and the module enabling the transmission of audio/video data of the module to the decoder.
  • This link is for example wired in series or parallel (for example link according to the standard IEEE1394) or wireless (for example radio of Bluetooth or infra-red type). If the digital link does not comprise supply or if its power is not sufficient to supply the module, this latter comprises its own supply (for example via a DC pack) or a specific connector supplied by the decoder.
  • one of the connectors of the module is deported.
  • the corresponding link can then be assured by a specific cable branching to a connector of the decoder.
  • the decoder is not restricted to a dedicated device but may cover different embodiments, for example an electronic card with the functions and connectors of the decoder previously described, the electronic card being intended to be inserted into a device (for example a computer). If an upgrading of the application implemented by the decoder
  • an operator broadcasts a new version on an existing channel (for example DVB-T if the decoder is adapted to receive DVB-T signals) that is received by the decoder that can thus upgrade its application.
  • This application is advantageously used to manage the communication module connected or intended to be connected to the decoder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Dans le but de permettre une mise à niveau d’un décodeur numérique audio/vidéo (30), un module de réception (31) destiné à un signal numérique audio et/ou vidéo, destiné à être connecté au décodeur comprend : - une première interface pour des données numériques, - un premier connecteur recevant un signal entrant filtré, - au moins un premier syntoniseur/démodulateur recevant le signal entrant filtré, le premier syntoniseur/démodulateur étant adapté pour fournir un flux de transport vidéo à la première interface de données numériques à partir du signal entrant filtré.
PCT/EP2009/057057 2008-06-10 2009-06-08 Module servant à la réception d’un signal vidéo et/ou audio numérique et système correspondant WO2009150135A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0853855 2008-06-10
FR0853855A FR2932349A1 (fr) 2008-06-10 2008-06-10 Module de reception d'un signal audio et/ou video numerique et systeme correspondant

Publications (1)

Publication Number Publication Date
WO2009150135A1 true WO2009150135A1 (fr) 2009-12-17

Family

ID=39855286

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/057057 WO2009150135A1 (fr) 2008-06-10 2009-06-08 Module servant à la réception d’un signal vidéo et/ou audio numérique et système correspondant

Country Status (2)

Country Link
FR (1) FR2932349A1 (fr)
WO (1) WO2009150135A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002271860A (ja) * 2001-03-12 2002-09-20 Sharp Corp 携帯電話端末及びテレビジョン受信機
US20030233667A1 (en) * 2002-06-17 2003-12-18 Abs-Cbn Broadcasting Corporation Method and apparatus for implementing a scaled upgrading of an upgradeable set-top box
JP2004241852A (ja) * 2003-02-03 2004-08-26 Funai Electric Co Ltd Ｔｖ、ｖｔｒ及びｔｖとｖｔｒのセット
US20060172760A1 (en) * 2003-03-17 2006-08-03 Sanyo Electric Co., Ltd Portable audio/video playback apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002271860A (ja) * 2001-03-12 2002-09-20 Sharp Corp 携帯電話端末及びテレビジョン受信機
US20030233667A1 (en) * 2002-06-17 2003-12-18 Abs-Cbn Broadcasting Corporation Method and apparatus for implementing a scaled upgrading of an upgradeable set-top box
JP2004241852A (ja) * 2003-02-03 2004-08-26 Funai Electric Co Ltd Ｔｖ、ｖｔｒ及びｔｖとｖｔｒのセット
US20060172760A1 (en) * 2003-03-17 2006-08-03 Sanyo Electric Co., Ltd Portable audio/video playback apparatus

Also Published As

Publication number Publication date
FR2932349A1 (fr) 2009-12-11

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