WO2007037660A1 - Systeme recepteur de diffusion a sorties multiples utilisant un decodeur unique - Google Patents

Systeme recepteur de diffusion a sorties multiples utilisant un decodeur unique Download PDF

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Publication number
WO2007037660A1
WO2007037660A1 PCT/KR2006/003947 KR2006003947W WO2007037660A1 WO 2007037660 A1 WO2007037660 A1 WO 2007037660A1 KR 2006003947 W KR2006003947 W KR 2006003947W WO 2007037660 A1 WO2007037660 A1 WO 2007037660A1
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WO
WIPO (PCT)
Prior art keywords
signal
filter
broadcast
top box
broadcast signal
Prior art date
Application number
PCT/KR2006/003947
Other languages
English (en)
Inventor
Hwa-Seop Lim
In-Ki Kim
Mansour Maalouf Joseph
Original Assignee
Kaonmedia Co., Ltd.
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 Kaonmedia Co., Ltd. filed Critical Kaonmedia Co., Ltd.
Publication of WO2007037660A1 publication Critical patent/WO2007037660A1/fr

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Classifications

    • 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
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • 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
    • 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
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • 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
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • 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
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/4227—Providing Remote input by a user located remotely from the client device, e.g. at work
    • 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
    • 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
    • H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals

Definitions

  • the present invention relates a multi-out broadcasting receiver system using a single set-top box, and more specifically to a multi-out broadcasting receiver system using a single set- top box which enables, under connection between a set- top box and multiple of TV receivers each positioned in distant locations through a pre-installed network of TV RF line in a house, the coexistence of remocon IR data and TV RF A/V signal in the RF line by adopting filter technology, so that a user may indepently watch multiple TV's in each of distant locations using a single set-top box, and further may remotely control a set-top box using a remocon from a distant location where the set- top box is not positioned.
  • a digital broadcasting receiver for receiving digital television broadcast e.g. set-top box (hereinafter, "STB")
  • STB set-top box
  • origianl A/V Audio/Video
  • each room is equipped a TV for its own. If these TV's are connected to single STB, it has advantage that through these TV's, users may watch satellite broadcast, cable broadcast, and digital terrestrial broadcast, etc.
  • an object of the present invention is to provide a multi-out broadcasting receiver system using a single STB which enables, under connection between a set-top box and multiple of TV receivers each positioned in distant locations through a pre- installed network of TV RF line in a house, the coexistence of remocon IR data and TV RF A/V signal in the RF line by adopting filter technology, so that a user may indepently watch multiple TV's in each of distant locations using a single set-top box and further may remotely control a set-top box using a remocon from a distant location where the set-top box is not positioned.
  • the multi-out broadcasting receiver system using single set-top box comprising: a set-top box, which including, a first broadcast processing module, by a user operation, for selecting a channel of broadcast signal received from external transmission medium, and a second broadcast processing module, upon receiving remocon control signal, for selecting a channel of the broadcast signal received from external tranmission medium, modulating A/V broadcast signal of the selected channel (hereinafter, "A/V remote broadcast signal”) to a predetermined broadcast frequency, and outputting the A/V remote broadcast signal as modulated; at least one host network connector having a first filter and a second filter, wherein the first filter for filtering STB control signal received from a specific network and providing the filtered STB control signal to the second broadcast processing module, and wherein the second filter for filtering the A/V remote broadcast signal received from the second broadcast processing module and passing the filtered A/V remote broadcast signal onto the network; at least one remocon signal receiver for sensing
  • the multi-out broadcasting receiver system using single set-top box comprising: a set-top box, which including, a first broadcast processing module, by a user operation, for selecting a channel of broadcast signal received from external transmission medium, and a second broadcast processing module, upon receiving remocon control signal via a specific network, for selecting a channel of the broadcast signal received from external tranmission medium, modulating A/V broadcast signal of the selected channel (hereinafter, "A/V remote broadcast signal”) to a predetermined broadcast frequency, and outputting the A/V remote broadcast signal as modulated; at least one remocon signal receiver for sensing STB control signal transmitted from a wireless remocon and outputting the sensed STB control signal onto a network; and at least one guest network connector having a fourth filter for filtering and passing the A/ V remote broadcast signal provided from the network.
  • A/V remote broadcast signal modulating A/V broadcast signal of the selected channel
  • the coexistence of remocon IR data and TV RF A/V signal in the RF line by adopting filter technology is enabled, so that a user may indepently watch multiple TV's in each of distant locations using a single set-top box, and may remotely control the set-top box from a distant location where the set-top box is not positioned using a remocon, and further so that additional cable engineering or expensive RF (UHF) remocon transmitter/receiver are not required.
  • UHF expensive RF
  • FIG. 1 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention
  • FIG. 2 is a functional block diagram illustrating a construction of the first broadcast processing module for the multi-out broadcasting receiver system using single STB shown in the FIG. 1,
  • FIG. 3 is a functional block diagram illustrating a construction of the second broadcast processing module for the multi-out broadcasting receiver system using single STB shown in the FIG. 1,
  • FIG. 4 is a diagram illustrating broadcasting channel frequencies which are used as carrier frequencies in order to transmit via network broadcast signal for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention
  • FIG. 5 is a diagram illustrating a procedure by which broadcast signal is transmitted using a specific broadcasting channel frequency for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention
  • FIG. 6 is a diagram illustrating a procedure by which broadcast signal is transmitted using a intermediate frequency, which frequency is set for avoiding the broadcasting channel frequencies, for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention
  • FIG. 7 is a diagram illustrating a procedure by which STB control signal transmitted using FSK (Frequency Shift Keying) modulation for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention
  • FIG. 8 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention
  • FIG. 8 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention
  • FIG. 9 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 8 where a third filter is added
  • FIG. 10 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 9 where a second filter is further added
  • FIG. 11 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 10 where a first filter is further added
  • FIG. 12 is a diagram illustrating broadcasting channel frequencies which are used as carrier frequencies in order to transmit via network broadcast signal for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention
  • FIG. 10 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 8 where a third filter is added
  • FIG. 10 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 9 where a second
  • FIG. 13 is a diagram illustrating a procedure by which broadcast signal is transmitted using a specific broadcasting channel frequency for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention
  • FIG. 14 is a diagram illustrating a procedure by which broadcast signal is transmitted using a intermediate frequency, which frequency is set for avoiding the broadcasting channel frequencies, for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention
  • FIG. 15 is a diagram illustrating a procedure by which STB control signal transmitted using FSK (Frequency Shift Keying) modulation for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention
  • FIG. 16 is a diagram illustrating a modified contraction of the multi-out broadcasting receiver system using single STB according to the present invention, where multiple of rooms are positioned in distant locations. [30] ⁇ Code Descriptions for Important Parts of Figures>
  • [31] 100 set-top box 110 : first broadcast processing module
  • FIG. 1 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention
  • the multi-out broadcasting receiver system using single STB includes a set- top box 100 having a first broadcast processing module 110 and a second broadcast processing module 120, a host network connector 130, a remocon signal receiver 150, and a guest network connector 160.
  • FIG. 16 is a diagram illustrating a modified contraction of the multi - out broadcasting receiver system using single STB according to the present invention, where multiple of rooms are positioned in distant locations, where a set-top box 100 having a first broadcast processing module 110 and at least one second broadcasting modules 120, at least one host network connectors 130, at least one remocon receivers 150, and at least one guest network connectors 160 are described.
  • the host network connectors 130 as shown in FIG. 16, are as same provided as the number of the second broadcast processing modules 120 so as to establishing the one-to-one correspondence.
  • only one set of host network connector 130 is provided so that the host network connector 130 mixes the signals from the broadcast processing modules 120 and outputs the mixed signal to the second filter 132 of the host network connector 130, and that the signal provided from the first filter 131 is respectively provided to each of the second broadcast processing modules 120.
  • the multi-out broadcasting receiver system using single set-top box may be similarily extended to be adapted to a case having two rooms as shown in FIGs. 1 to 7, or to a case having many rooms as shown in FIG. 16, which lets any repetitive descriptions regarding substantially same constuction be omitted.
  • the first broadcast processing module 110 selects a channel of broadcast signal received from external transmission medium, and outputs the selected channel of A/V broadcast signal.
  • the first broadcast processing module 110 comprises a broadcast signal receiver 111, MPEG decoder 112, and A/V broadcast signal output 113.
  • FIG. 2 is a functional block diagram illustrating a construction of the first broadcast processing module 110 for the multi-out broadcasting receiver system using single STB shown in the FIG. 1.
  • the broadcast signal receiver 111 receives the broadcast signal from external transmission medium, and outputs the digital broadcast signal, and the MPEG decoder 112 decodes the received broadcast signal and D/A converts the decoded signal.
  • the A/V broadcast signal output 113 receives the broadcast signal from the MPEG decoder 112, modulates the received broadcast signal to A/V signal, and outputs the modulated signal to the first TV receiver 140.
  • the second broadcast processing module 120 upon receiving the remote control signal, selects a channel for the broadcast signal received from external tranmission medium, and modulates the selected channel of A/V broadcast signal (hereinafter, "A/V remote broadcast signal") to a predetermined broadcast frequency.
  • A/V remote broadcast signal A/V broadcast signal
  • the second broadcast processing module 120 comprises a broadcast signal receiver 121, MPEG decoder 122, broadcast signal modulater 123, an amplifier 124, a remocon signal retriever 125, and a second broadcast processing controller 126.
  • FIG. 3 is a functional block diagram illustrating a construction of the second broadcast processing module 120 for the multi-out broadcasting receiver system using single STB shown in the FIG. 1.
  • the broadcast signal receiver 121 receives a broadcast signal from external transmission medium and outputs the received broadcast signal to the MPEG decoder 122.
  • the MPEG decoder 122 decodes the received broadcast signal and D/ A converts the decoded signal.
  • the broadcast signal modulater 123 receives the broadcast signal from the MPEG decoder 122, and modulates the broadcast signal to a predetermined broadcast frequency, and then outputs the modulated signal to the second filter 132.
  • the remocon signal retriever 125 retrieves the remote control signal provided from the first filter 131, and then outputs the retrieved signal.
  • the second broadcast processing controller 126 sets the broadcast channel of the broadcast signal receiver responding to the remote control signal provided from the remocon signal retriever 125. Further, the second broadcast processing controller 126 includes functions of, by remote control signal, system configuration, menu setup, PVR (Personal Video Recorder) control, EPG (Electronic Program Guide) control.
  • an amplifer 124 may be installed to the end of the broadcast signal modulater 123 in order to compensate loss in the A/V remote broadcast signal incurred due to cable line distance.
  • the first broadcast processing module 110 and the at least one second broadcast processing module 120 may be implemented as one-chip or as separated chips.
  • the host network connector 130 includes a first filter 131 and a second filter 132.
  • the first filter 131 filters STB control signal received from from a specific network 190, and provides the filtered STB control signal to the second broadcast processing module 120.
  • the second filter 132 filters A/V remote broadcast signal received from the second broadcast processing module, and passes the filtered A/V remote broadcast signal onto the network 190.
  • the remocon signal receiver 150 senses and outputs the STB control signal transmitted from a wireless remocon 180.
  • the guest network connector 160 includes a third filter 161 and a fourth filter 162.
  • the third filter 161 filters the STB control signal received from the remocon signal receiver 150, and passes the filtered STB control signal onto the network 190.
  • the fourth filter 162 filters and passes the A/V remote broadcast signal provided from the network 190.
  • the first filter 131 and the third filter 161 are low pass filters (LPF) which covering bandwidth of remocon signal frequency range
  • the second filter 132 and the fourth filter 162 are high pass filters (HPF) which covering bandwidth of VHF/UHF frequency range.
  • the set-top box 100 may be constructed as one single set which includes the host network connector 130 having the first filter 131 and the second filter 132.
  • the guest network connector 160 having the third filter 161 and the fourth filter 162 may be constructed as one single set which includes the remocon signal receiver 150.
  • the network 190 generally refers to a pre-installed TV coaxial cable or other post-installed network cable.
  • the operations of the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention will be described in detail with reference to FIGs. 1 and 2, wherein, with letting the host network connector 130 being positioned in a living room and the guest network connector 160 being positioned in other location (a main room or study rooms), the host network connector 130 and the guest network connector 160 is each connected via coaxial cables to RF terminals on the wall.
  • the remocon signal receiver 150 senses STB control signal transmitted from the wireless remocon 180 and outputs the sensed signal to the third filter 161 of the guest network connector 160, and then the fourth filter 162 of the guest network connector 160 filters the STB control signal and passes to the network 190.
  • the first filter 131 of the host network connector 130 receives and filters the
  • the STB control signal transmitted from the network 190 to the guest network connector 160, and outputs the filtered signal to the second broadcast processing module 120.
  • the second broadcast processing module 120 receives the filtered signal (remote control signal) from the first filter 131 of the host network connector 130. Then, the second broadcast processing module 120, by the remote control signal, modulates the A/V remote broadcast signal received from external transmission medium, and then outputs the modulated signal to the second filter 132 of the host network connector 130.
  • the second filter 132 of the host network connector 130 receives and passes to the network 190 the A/V remote broadcast signal which is modulated through the second broadcast processing module 120.
  • the fourth filter 162 of the guest network connector 160 receives and filters to pass the A/V remote broadcast signal.
  • the second TV receiver 170 receives the A/V remote broadcast signal and displayes a corresponding program to users.
  • the first filter 131 and the third filter 161 are low pass filters (LPF) which covering bandwidth of remocon signal frequency range
  • the second filter 132 and the fourth filter 162 are high pass filters (HPF) which covering bandwidth of VHF/UHF frequency range.
  • the broadcast signal receiver 111 by user operation, selects channel of broadcast signal received from external transmission medium, and outputs digital broadcast signal accordingly. Then, the MPEG decoder 120 decodes the broadcast signal. The A/V broadcast signal output 113 processes the broadcast signal into A/V broadcast signal which fulfilling a output specification, and then outputs the processed signal to the first TV receiver 170.
  • FIG. 4 is a diagram illustrating broadcasting channel frequencies which are used as carrier frequencies in order to transmit via network broadcast signal for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention.
  • the broadcast signal modulater 123 modulates the A/V remote broadcast signal to a specific broadcasting channel frequency, and outputs the modulated signal.
  • the procedure of using a specific broadcasting channel frequency shown in FIG. 4 as a carrier frequency is described in FIG. 5.
  • FIG. 5 is a diagram illustrating a procedure by which broadcast signal is transmitted using a specific broadcasting channel frequency for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention.
  • the broadcast signal modulater 123 modulates the A/V remote broadcast signal to 474 MHz which corresponds to channel 21, and outputs the modulated signal to the second filter 132. Then, the A/V remote broadcast signal, which is modulated to the frequency of 474 MHz, is carried via the network 190 to the fourth filter 162.
  • the fourth filter 162 if configured to pass signal of 474 MHz out of signals received from the network 190, passes the A/V remote broadcast signal which has been modulated by the broadcast signal modulater 123 to 474 MHz as matching to channel 21. Therefore, the second TV receiver 170 may display the A/V broadcast signal which is transmitted as modulated by the broadcast signal modulater 123.
  • the broadcast signal modulater may use an intermediate frequency avoiding the broadcasting channel frequencies as carrier frequency, which is conceptually described in FIG. 6.
  • FIG. 6 is a diagram illustrating a procedure by which broadcast signal is transmitted using a intermediate frequency, which frequency is set for avoiding the broadcasting channel frequencies, for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention.
  • the broadcast signal modulater 123 modulates the A/V remote broadcast signal to 478 MHz which corresponds to an intermediate frequency between channel 21 and channel 22 as shown in FIG. 4, and outputs the modulated signal to the second filter 132.
  • the A/V remote broadcast signal which is modulated to the frequency of 478 MHz, is carried via the network 190 to the fourth filter 162.
  • the fourth filter 162 if configured to pass signal of 478 MHz out of signals received from the network 190, passes the A/V remote broadcast signal which has been modulated by the broadcast signal modulater 123 to 478 MHz as matching to channel 21.
  • the second TV receiver 170 is manufactured according to the prior art broadcasting channel frequencies, the signal should be changed to a signal corresponding to channel 21. Therefore, with positioning a modulating unit 165 between the fourth filter 162 and the second TV receiver 170, the modulating unit 165 re- modulates the A/V remote broadcast signal of 478 MHz which has passed out from the fourth filter 162 into the frequency of 474 MHz corresponding to channel 21. Therefore, the second TV receiver 170 may display the A/V broadcast signal which is transmitted as modulated by the broadcast signal modulater 123.
  • FIG. 7 is a diagram illustrating a procedure by which STB control signal transmitted using FSK (Frequency Shift Keying) modulation for the multi-out broadcasting receiver system using single STB according to an embodiment of the present invention.
  • FSK Frequency Shift Keying
  • the guest network connector 160 may be configured to FSK (Frequency Shift
  • the STB control signal received from the remocon signal receiver 150. That is, by further including a FSK modulater 166 doing FSK modulation, the STB control signal is provided to the network 190 as FSK-modulated.
  • the host network connector 130 is provided a remote control signal as FSK- modulated.
  • FSK demodulater 136 recovers the remote control signal as original by FSK demodulation, the recovered remote control signal is provided to remocon signal retriever 125 of the second broadcast processing module 120, by which transmission of the remote control signal is accomplished.
  • FIG. 16 shows a multi-out broadcasting receiver system using single set-top box according to this invention where multiple of rooms are engaged, and the operation for this embodiment is the same as the case of two rooms shown in FIGs. 1 to 7, which lets any unnecessary repetitive descriptions be omitted.
  • FIG. 8 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention
  • the embodiment shown in FIG. 1 includes all the filters, from the first filter 131 to the fourth filter 162.
  • the second embodiment shown in FIGs. 8 to 11 has the characteristics of optionally including filters other than the fourth filter 262.
  • the multi-out broadcasting receiver system using single set-top box comprises a set-top box 200 having a first broadcast processing module 210 and a second broadcast processing module 220, a remocon signal receiver 250 and a guest network connector 260.
  • the multi-out broadcasting receiver system using single set- top box reflects a modified contraction, where multiple of rooms are positioned in distant locations, wherein the system may comprise a set-top box 100 having a first broadcast processing module 110 and at least one second broadcasting modules 120, at least one remocon receivers 150 and at least one guest network connectors 160.
  • the multi-out broadcasting receiver system using single set- top box according to a second embodiment of the present invention may be similarily extended to be adapted to a case having two rooms as shown in FIGs. 8 to 15, or to a case having many rooms as shown in FIG. 16, which lets any repetitive descriptions regarding substantially same constuction be omitted.
  • the first broadcast processing module 210 selects a channel of broadcast signal received from external transmission medium, and outputs the selected channel of A/V broadcast signal.
  • the second broadcast processing module 220 upon receiving the remote control signal via a specific network 290, selects a channel for the broadcast signal received from external tranmission medium, and modulates the selected channel of A/V broadcast signal (hereinafter, "A/V remote broadcast signal") to a predetermined broadcast frequency, and then outputs the modulated signal to the network 290,
  • the second broadcast processing module 220 comprises a broadcast signal receiver for receiving a broadcast signal from external transmission medium and outputting the received broadcast signal, an MPEG decoder for decoding the received broadcast signal and for D/A converting the decoded signal, a broadcast signal modulater for receiving the broadcast signal from the MPEG decoder and modulating the broadcast signal to a predetermined broadcast frequency, and then outputting the modulated signal to the network 290 or the second filter 232, a remocon signal retriever for retrieving remote control signals provided from the network 290 or the first filter 231 and outputting the retrieved remote control signal, and a second broadcast processing controller for setting the broadcast channel of the broadcast signal receiver responding to the remote control signal provided from the remocon signal retriever.
  • the second broadcast processing controller includes functions of, by remote control signal, system configuration, menu setup, PVR (Personal Video Recorder) control, EPG (Electronic Program Guide) control.
  • an amplifer may be installed to the end of the broadcast signal modulater in order to compensate loss in the A/V remote broadcast signal incurred due to cable line distance.
  • the first broadcast processing module 210 and the at least one second broadcast processing module 220 may be implemented as one-chip or as separated chips.
  • the remocon signal receiver 250 senses and outputs the STB control signal transmitted from a wireless remocon 280.
  • the guest network connector 260 includes a fourth filter 262 for filtering and passing the A/V remote broadcast signal provided from the network 290.
  • the fourth filter 262 is high pass filter (HPF) which covering bandwidth of VHF/UHF frequency range.
  • the network 290 generally refers to a pre-installed TV coaxial cable or other post- installed network cable.
  • FIG. 9 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 8 where a third filter is added.
  • the guest network connector 260 further comprises a third filter
  • the third filter 261 is low pass filter (LPF) which covering bandwidth of remocon signal frequency range
  • the fourth filter 262 is high pass filter (HPF) which covering bandwidth of VHF/UHF frequency range.
  • FIG. 10 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 9 where a second filter is further added.
  • a host network connector 230 which having a second filter 232 for, upon receiving A/V remote broadcast signal from the second broadcast processing module 220, filtering the A/V remote broadcast signal so as to pass the filtered signal onto the network 290.
  • the third filter 261 is low pass filter (LPF) which covering bandwidth of remocon signal frequency range
  • the second filter 232 and the fourth filter 262 are high pass filters (HPF) which covering bandwidth of VHF/ UHF frequency range.
  • FIG. 11 is a functional block diagram illustrating a construction of the multi-out broadcasting receiver system using single STB of the FIG. 10 where a first filter is further added.
  • the host network connector 230 further comprises a first filter
  • the first filter 231 and the third filter 261 is low pass filter (LPF) which covering bandwidth of remocon signal frequency range
  • the second filter 232 and the fourth filter 262 are high pass filters (HPF) which covering bandwidth of VHF/UHF frequency range.
  • FIG. 12 is a diagram illustrating broadcasting channel frequencies which are used as carrier frequencies in order to transmit via network broadcast signal for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention.
  • the broadcast signal modulater 223 modulates the A/V remote broadcast signal to a specific broadcasting channel frequency, and outputs the modulated signal.
  • the procedure of using a specific broadcasting channel frequency shown in FIG. 12 as a carrier frequency is described in FIG. 13.
  • FIG. 13 is a diagram illustrating a procedure by which broadcast signal is transmitted using a specific broadcasting channel frequency for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention.
  • the broadcast signal modulater 223 modulates the A/V remote broadcast signal to 474 MHz which corresponds to channel 21, and outputs the modulated signal to the second filter 232. Then, the A/V remote broadcast signal, which is modulated to the frequency of 474 MHz, is carried via the network 290 to the fourth filter 262.
  • the fourth filter 262 if configured to pass signal of 474 MHz out of signals received from the network 290, passes the A/V remote broadcast signal which has been modulated by the broadcast signal modulater 223 to 474 MHz as matching to channel 21. Therefore, the second TV receiver 270 may display the A/V broadcast signal which is transmitted as modulated by the broadcast signal modulater 223.
  • the broadcast signal modulater may use an intermediate frequency avoiding the broadcasting channel frequencies as carrier frequency, which is conceptually described in FIG. 14.
  • FIG. 14 is a diagram illustrating a procedure by which broadcast signal is transmitted using a intermediate frequency, which frequency is set for avoiding the broadcasting channel frequencies, for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention.
  • the broadcast signal modulater 223 modulates the A/V remote broadcast signal to 478 MHz which corresponds to an intermediate frequency between channel 21 and channel 22 as shown in FIG. 12, and outputs the modulated signal to the second filter 232. Then, the A/V remote broadcast signal, which is modulated to the frequency of 478 MHz, is carried via the network 290 to the fourth filter 262.
  • the fourth filter 262 if configured to pass signal of 478 MHz out of signals received from the network 290, passes the A/V remote broadcast signal which has been modulated by the broadcast signal modulater 223 to 478 MHz as matching to channel 21.
  • the second TV receiver 270 Because the second TV receiver 270 is manufactured according to the prior art broadcasting channel frequencies, the signal should be changed to a signal corresponding to channel 21. Therefore, with positioning a modulating unit 265 between the fourth filter 262 and the second TV receiver 270, the modulating unit 265 re- modulates the A/V remote broadcast signal of 478 MHz which has passed out from the fourth filter 262 into the frequency of 474 MHz corresponding to channel 21. Therefore, the second TV receiver 270 may display the A/V broadcast signal which is transmitted as modulated by the broadcast signal modulater 223.
  • FIG. 15 is a diagram illustrating a procedure by which STB control signal transmitted using FSK (Frequency Shift Keying) modulation for the multi-out broadcasting receiver system using single STB according to a second embodiment of the present invention.
  • FSK Frequency Shift Keying
  • the guest network connector 260 may be configured to FSK (Frequency Shift
  • the STB control signal received from the remocon signal receiver 250. That is, by further including a FSK modulater 266 doing FSK modulation, the STB control signal is provided to the network 290 as FSK-modulated.
  • the host network connector 230 is provided a remote control signal as FSK- modulated.
  • FSK demodulater 236 recovers the remote control signal as original by FSK demodulation
  • the recovered remote control signal is provided to remocon signal retriever 225 of the second broadcast processing module 220, by which transmission of the remote control signal is accomplished.
  • FIG. 16 shows a multi-out broadcasting receiver system using single set-top box according to this invention where multiple of rooms are engaged, and the operation for this embodiment is the same as the case of two rooms shown in FIGs. 8 to 15, which lets any unnecessary repetitive descriptions be omitted.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Details Of Television Systems (AREA)

Abstract

La présente invention concerne un système récepteur de diffusion à sorties multiples utilisant un décodeur unique qui permet, en connexion entre un décodeur et des récepteurs T.V., dont chacun se trouve dans un lieu distant, via un réseau pré-instalé (une ligne RF) dans une habitation ou dans tout autre lieu déterminé, de faire coexister les données IR d'une télécommande et d'un signal RF A/V de T.V. grâce à l'adoption d'une technologie de filtrage; de cette manière, un utilisateur peut regarder indépendamment des postes de T.V. multiples dans chacun des lieux distants en utilisant une télécommande unique et peut commander le décodeur à distance à partir d'un endroit où le décodeur n'est pas installé, en utilisant une télécommande. Selon l'invention, le système récepteur de diffusion à sorties multiples utilisant un décodeur unique présente l'avantage de permettre à l'utilisateur de regarder indépendamment des postes de T.V. multiples dans chacun des lieux distants utilisant un décodeur unique; de ne pas nécessiter l'installation d'un câble dans chacun des lieux distants ou l'utilisation d'une télécommande d'émetteur / récepteur RF (THF) coûteuse, ce qui permet d'effectuer l'installation facilement et à un coût moindre.
PCT/KR2006/003947 2005-09-30 2006-09-29 Systeme recepteur de diffusion a sorties multiples utilisant un decodeur unique WO2007037660A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2005-0092426 2005-09-30
KR1020050092426A KR100770146B1 (ko) 2005-09-30 2005-09-30 단일 셋톱박스를 이용한 다중출력 방송수신 시스템

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WO2007037660A1 true WO2007037660A1 (fr) 2007-04-05

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KR101561509B1 (ko) * 2014-02-25 2015-10-20 나시스 주식회사 복수의 단말기로 서로 다른 위성방송을 제공하기 위한 장치 및 방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010019103A (ko) * 1999-08-25 2001-03-15 윤종용 다수의 ｔｖ와 연결된 셋탑박스시스템
KR20040100809A (ko) * 2003-05-19 2004-12-02 삼성전기주식회사 고주파 변조기 및 이를 이용한 방송수신장치
US20050076373A1 (en) * 2003-09-16 2005-04-07 Jung Byung Dal Multi-displays supporting set-top box
JP2005123734A (ja) * 2003-10-14 2005-05-12 Sharp Corp 無線通信システム及び通信装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010019103A (ko) * 1999-08-25 2001-03-15 윤종용 다수의 ｔｖ와 연결된 셋탑박스시스템
KR20040100809A (ko) * 2003-05-19 2004-12-02 삼성전기주식회사 고주파 변조기 및 이를 이용한 방송수신장치
US20050076373A1 (en) * 2003-09-16 2005-04-07 Jung Byung Dal Multi-displays supporting set-top box
JP2005123734A (ja) * 2003-10-14 2005-05-12 Sharp Corp 無線通信システム及び通信装置

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