WO2001030077A1 - Procede de transmission multiplex de signaux de television et systeme de transmission associe - Google Patents

Procede de transmission multiplex de signaux de television et systeme de transmission associe Download PDF

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Publication number
WO2001030077A1
WO2001030077A1 PCT/JP2000/007248 JP0007248W WO0130077A1 WO 2001030077 A1 WO2001030077 A1 WO 2001030077A1 JP 0007248 W JP0007248 W JP 0007248W WO 0130077 A1 WO0130077 A1 WO 0130077A1
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WO
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Prior art keywords
signal
transmission
transmitted
transmission system
transfer mode
Prior art date
Application number
PCT/JP2000/007248
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English (en)
Japanese (ja)
Inventor
Masashi Iwai
Original Assignee
Aichidenshi Kabushiki Kaisha
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 Aichidenshi Kabushiki Kaisha filed Critical Aichidenshi Kabushiki Kaisha
Priority to AU79486/00A priority Critical patent/AU7948600A/en
Publication of WO2001030077A1 publication Critical patent/WO2001030077A1/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
    • H04N21/43—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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission

Definitions

  • the present invention relates to a transmission method of a television signal and a transmission system thereof.
  • a telecommunications signal that enables CS, terrestrial digital, and data communications over a single interface. It relates to the multiplex transmission system and its transmission system.
  • the present invention can be applied to a digital TV network capable of receiving and transmitting digital TV broadcasts and a LAN. Background technology
  • TV broadcasting there are two types of TV broadcasting: ground wave broadcasting and satellite broadcasting.
  • CATV systems the CATV station receives them and the CATV cable receives them. Send it to
  • the 03 broadcast is transmitted with a 0-3 (Quadrature Phase Shift Keying) modulation signal.
  • the CATV station receives the signal from the satellite, demodulates the signal, modulates it using the 64QAM method, and transmits it to the CATV network.
  • 6 4 QAM The method is a modulation that combines the QPSK modulation and the amplitude modulation. This is a method of expressing 64 values by combining the 16 phase and 4 amplitude values.
  • the frequency used for one channel is a single frequency, and multiple channels are transmitted with frequency division and multiplexing.
  • terrestrial wave transmission is performed by the Orthogonal Frequency Division Multiplex (FDM) method (orthogonal frequency division multiplexing). It is a multi-carrier modulation scheme that uses hundreds of carriers instead of a single frequency band for each channel, and the frequency is an integer. In this method, a large number of carriers in a double relationship are modulated by PSK and transmitted.
  • FDM Orthogonal Frequency Division Multiplex
  • the station side needs a QPSK demodulator and QAM modulator for CS transmission, and an OFDM modulator for ground wave.
  • a QAM type demodulator that demodulates CS transmission, or a QPSK type demodulator and OFDM demodulator that demodulates terrestrial wave transmission are provided.
  • a two-way receiver is required. This is a system with a high transmission cost as soon as the equipment costs are burdened both for the station side and for the subscribers.
  • the present invention has been made to solve the above-described problem, and the purpose is to transmit CS through one interface. , Ground wave digital broadcasts, and both broadcasts can be received.
  • the purpose is to provide a multiplexed transmission method for television signals and its transmission system.
  • Another purpose is to apply the transmission method to the CATV system, to enable the reception of the above two-way transmissions, and to use the CATV transmission path. It is to create a LAN that allows data communication with other subscribers. In addition, connection to other LANs via the Internet is also possible.
  • the first invention is to convert the television signal.
  • This is a transmission method in which the data is transmitted in a multiplexed manner.
  • the satellite transmission signal and the terrestrial wave digital transmission signal are received and demodulated.
  • And generate a time-division multiplexed signal by generating a time-division multiplexed signal of each baseband signal, and generate a time-division multiplexed signal. It is characterized in that the time-division multiplexed signal is transmitted to the transmission line after optical modulation or high-frequency modulation.
  • the above-mentioned transmission path is a coreless transmission path such as an optical fiber, a transmission path, a coaxial cable, a twisted pair wire and the like, and an empty space without a transmission medium.
  • satellite broadcasting is transmitted from satellites in the QPSK system, and terrestrial wave broadcasting is transmitted in the OFDM system.
  • a baseband signal that receives both types of broadcast waves, TV and, and demodulates in each of the modes to form a 01-1 Generate a number.
  • the time division multiplexed signal that multiplexes each base node signal by time division multiplexing to generate a time division multiplexed signal is a time division multiplexed signal.
  • the signals on the axis are arranged in order by a note for each channel.
  • an optical signal or Transmits a high-frequency signal to the transmission path after optical modulation or high-frequency modulation.
  • the m-star transmission signal and the terrestrial digital transmission signal are also optical modulation signals or time-division multiplexed base-node signals. Sent with a high frequency modulation signal. Therefore, the sending and receiving interfaces can be the same interface for both broadcast signals. In short, the transmitting side does not need to be equipped with a two-way modulator in the conventional way. As a result, a television signal multiplexed transmission system with a reduced transmission cost is provided.
  • the optical modulation is ⁇ N / 0 FF of the optical signal
  • the high frequency modulation is the phase modulation, frequency modulation, amplitude modulation of the high frequency signal. Or, it means modulation by the combination of these.
  • the second invention is a transmission system using the above-mentioned multiplexed transmission method of the television signal, and is a joint system with a CATV station or a TV station.
  • the ⁇ V station means a TV station that transmits by air transmission, in that it is characterized by the fact that it consists of a transmission path connecting the two parties.
  • a CATV station transmits a time-division multiplexed signal including a satellite broadcast signal and a ground wave digital broadcast signal to a subscriber via a transmission line.
  • the transmission path is, for example, a CATV transmission path including an optical fiber transmission path and a coaxial cable transmission path.
  • the CATV transmission line is capable of transmitting them with high quality.
  • subscribers can receive both broadcasts with high quality without having to deploy a new antenna.
  • the above-mentioned time-division multiplex may be used in an area where radio waves can reach without interruption.
  • the coded signal can be released from both sides only by installing an antenna. be able to . In short, it becomes an inexpensive transmission system of the reception cost.
  • the CATV station or the TV station also has a means for demodulating the satellite broadcast signal to demodulate the satellite broadcast signal to the first baseband signal.
  • a digital broadcast demodulation means for demodulating a ground wave digital broadcast signal into a second baseband signal, and a first baseband, Time division multiplexing of the signal and the second base station, and the end signal to generate a time division multiplexed signal, and adding the time division multiplexed signal.
  • the feature is that it has a designated standard in-face that is sent to the entrant.
  • the satellite broadcasting demodulation means receives the satellite broadcasting signal and demodulates it to the first base node signal.
  • the digital transmission / demodulation means receives the ground wave digital transmission signal and demodulates the signal into a second baseband signal. Then, the interface of the prescribed standard multiplexes the first baseband signal and the second baseband signal by time-sharing and multiplexing. Then, the generated time-divided multi-layered signal is transmitted to the subscriber.
  • the CATV station or the TV station does not need to have two types of modulators having different transmission methods as in the past.
  • both the satellite transmission signal and the terrestrial wave digital transmission signal are sent to the subscriber through one standardized interface. Can be sent.
  • the transmission system has a reduced transmission cost.
  • each participant was provided with a prescribed standard interface and was transmitted by optical modulation or high-frequency modulation.
  • the time division multiplexed signal is demodulated, and the satellite broadcast signal and terrestrial wave data are transmitted by the prescribed equipment connected to the prescribed standard interface. It is characterized by obtaining a digital broadcast signal.
  • the satellite broadcasting signal and the terrestrial digital broadcasting signal can be demodulated in one standard interface.
  • a transmission system in which the receiving cost of the subscriber is reduced is obtained.
  • the time-division multiplexed signal is a participant in the synchronous transfer mode of the prescribed standard interface. It is characterized by being transmitted to
  • the time-division multiplexed signal is a time-division multiplexed signal of a baseband signal of a satellite broadcast signal and a ground wave digital broadcast signal.
  • the above-mentioned time-division multiplexed signal is transmitted to the subscriber at a high speed in synchronization. Therefore, the satellite transmission signal and the terrestrial wave digital transmission signal are transmitted and received in real time, and the multiplexing transmission method of the television signal is used. It is the formula and its transmission system.
  • the prescribed standard interface has a data communication function
  • each of the interfaces has a computer means. Subscribers and the CATV station will communicate overnight via the computer means and the data communication function of the specified interface. It is characterized by
  • the specified standard interface has a data communication function, which enables not only TV broadcast signals but also data communication.
  • Each subscriber with computer means and the CATV station may exchange data with each other by this data communication function. Wear . Also, for example, if a CATV station is connected to the Internet, each subscriber with a combo overnight means will be a subscriber. You can also connect to the evening net. Therefore, it becomes a more convenient transmission system.
  • the data overnight signal used for data communication is transmitted in the asynchronous transmission mode after the synchronous transmission mode ends. Issued
  • the interface according to the standard of the present invention has an asynchronous transfer mode, and data communication is performed in this asynchronous transfer mode. Is performed. As a result, it is possible to efficiently perform de-evening communication.
  • a relay device is provided in the middle of the transmission path, and the relay device, the CATV station, and the subscriber are required to transmit the synchronous transfer mode.
  • Synchronous transfer detection means for detecting the end of the synchronous transfer mode, and a time division multiplexed signal and other data supply equipment synchronized with the end detection of the synchronous transfer mode.
  • the relay device means a branching / distribution amplifier, a branching device, a branching device, and the like.
  • the switch means is capable of transmitting a time-division multiplexed signal for transmitting a TV signal to a predetermined standard interface.
  • the transmission path is switched so that it is transmitted from the subscriber to the subscriber.
  • a data signal that transmits data from another data supply device to the subscriber is transmitted to the subscriber.
  • the transmission path is switched. Therefore, other standards, for example, IEEE 802.3 CSMA / CD ⁇ Carrier Sense Multiple Access ith C 011 isi 0. n Detection) method LAN can be formed.
  • the CATV transmission path is used as the existing LAN transmission path. It can be used effectively. As a result, digital TV broadcasting and the formation or expansion of an existing LAN can be performed, resulting in a more convenient transmission system.
  • a high-speed interface according to the IEEE 1394 standard is provided as an interface for the standard. ing .
  • the IEEE 1394 standard high-speed interface has a synchronous transfer mode (isochronous transfer mode) and an asynchronous transfer mode. (Asynchronous transfer mode).
  • the isochronous transfer described above is a socket transfer, and its transmission latency is several hundred Mb.ps to several Gbps. Also, isochronous transfer is a cycle of exactly 125 ⁇ sec, for example, sending multiple octets in a period of 100sec. According to this, for example, if an image signal of one screen is divided into several packets and transmitted by isochronous transfer, several to several tens of cycles can be obtained. All video signals can be sent with
  • the transfer speed is 1 Gbps and the isochronous transfer period is 100 sec
  • 100 kbits of data per cycle can be obtained.
  • the IEEE 1394 standard high-speed interface has an asynchronous transfer mode as described above.
  • the period is, for example, 25 sec after the above-mentioned synchronous transfer mode.
  • the transfer speed of this asynchronous transfer mode is also several hundred M to several Gbps. Therefore, if the empty time is used, the transfer speed is several tens kbps even if it is several tens sec. As a result, data communication becomes possible.
  • FIG. 1 is a configuration diagram of a transmission system according to a first embodiment of the present invention.
  • FIG. 2 is a timing diagram of a multiplexed transmission method of a television signal according to the first embodiment of the present invention.
  • FIG. 3 is a configuration diagram of a transmission system according to a second embodiment of the present invention.
  • FIG. 4 is a configuration diagram of a nozzle device used on the CATV station side according to the second embodiment of the present invention.
  • FIG. 5 is a configuration diagram of a distribution device used for a CATV transmission line according to a second embodiment of the present invention.
  • FIG. 6 is a view showing a configuration of a device used on a subscriber device side according to a second embodiment of the present invention.
  • FIG. 7 is a configuration diagram of a transmission system of a subscriber unit according to a third embodiment of the present invention.
  • FIG. 8 is a configuration diagram of a transmission system according to a modified example of the first embodiment of the present invention.
  • FIG. 9 is a configuration diagram of a transmission system of a subscriber unit according to a modification of the third embodiment of the present invention. Best form to carry out the invention
  • FIG. 1 shows the CATV transmission system of the present invention.
  • the figure is a configuration diagram.
  • the CATV transmission system of the present invention is composed of a CATV station 5, a CATV transmission line 50, and a subscriber unit 80.
  • the television signal multiplexing transmission method of the present invention is used in this system.
  • the CATV station 5 has a CS antenna 10 for receiving a satellite broadcast signal (CS broadcast signal), and a satellite broadcast for demodulating the received signal.
  • QPSK demodulator 11 1 which is the demodulation means
  • terrestrial wave antenna 20 for receiving terrestrial wave digital broadcast signals
  • digitizer for demodulating the signal OFDM demodulator 21 1 which is a means for transmitting and receiving signals
  • voluntary broadcasting device 30 for broadcasting voluntary broadcasts
  • QPSK demodulator 11 and OFDM demodulator 2 According to 1
  • the generated baseband signal and the baseband signal sent from the voluntary transmitter 30 are combined in a time-division multiplexed manner.
  • IEEE 1394 Nov 40 which is a standard-standard interface that sends the time-division multiplexed signal to the CATV transmission line 50, and It is a data supply device that allows data signals to be input and output from IEEE1394 and BUS40. It is.
  • the CATV transmission line 50 is an optical fin, '51, an optical distributor 52, a coaxial cable 53, an amplifier 57, and a relay device. It comprises a distributor 60 and photoelectric converters 55 and 56.
  • the photoelectric converter 55 when the signal flows from the upstream to the downstream, the optical signal is converted to the electrical signal, and the signal is converted from the downstream to the upstream. When flowing into a stream, electrical signals are converted to optical signals.
  • the photoelectric converter 56 converts the electrical signal to an optical signal, and the signal from the downstream to the upstream flows. The optical signal is converted to an electrical signal when the current flows.
  • the subscriber device 80 is connected to the IEEE 1394 node 90 and the IEEE 1394 node 90, which are the same interface of the same standard. It is composed of a computer device 82, a VTR device 83, and a TV device 84, which are computer means to be connected.
  • satellite broadcasting is transmitted from satellites in the QPSK method, and terrestrial wave transmission is transmitted in the OFDM method.
  • the CS antenna 10 and the terrestrial wave antenna 20 of the CATV station 5 respectively receive and transmit these two types of transmission waves, and each of them receives a QPSK demodulator. 1 1 and demodulated by OFDM demodulator 2 1 .
  • a base node signal consisting of a sequence of 0 and 1 data is obtained.
  • the respective baseband signals are transmitted to the above-mentioned IEEE 1394 node 40.
  • the IEEE 1394-NO and the bus 40 are connected to the synchronous transfer mode a (isochronous transfer mode). It has asynchronous transfer mode b (asynchronous transfer mode).
  • the horizontal axis is time, and the vertical axis is signal strength.
  • the cycle combining the two modes is controlled to 8 kHz (l cycle 125 / sec) precisely by a cycle-mass not shown. ing .
  • the start note 110 that means the start of transmission is transmitted, and after the next acquisition of the nos, the start note 1110 is transmitted.
  • a TV signal converted to a baseband signal is transmitted in a plurality of packets 11 1.
  • one screen of video data—evening is divided into multiple buckets and transferred.
  • the transfer speed is, for example, several hundred M to several Gbps, so that several cycles to several tens of cycles (the scanning time of one screen is 3 3 Within msec), all video data can be transferred.
  • it is transferred in real time.
  • the transfer is carried out by an optical signal, for example, by an ON / OFF signal by a semiconductor laser base signal (not shown) and an AND signal.
  • the transmitted optical signal carries an optical phono, '51, and has, for example, a subscriber unit 80 via a plurality of optical distributors 52. It is input to the IEEE 1394 node 90 (Fig. 1).
  • the IEEE 1394 node 90 converts the optical signal to an electrical signal and, at the same time, responds to the address of the signal, such as a TV. Distribute the signal to device 84 and VTR device 83. This In this way, the CS broadcast and the terrestrial wave broadcast are transmitted.
  • the branch of the CATV transmission line is connected to the specified carrier wave by using a photoelectric converter 55, a modulator / demodulator 55 a, an amplifier 57, and a distributor 60.
  • the electric signal is modulated and transmitted by the coaxial cable 53.
  • a photoelectric converter 56 and a modulator / demodulator 56a are further inserted to convert the electric signal into an optical signal, and the above-mentioned subscriber is added.
  • subscriber device 80 can similarly receive CS and terrestrial wave transmissions.
  • the data signal is transmitted by the socket 112 during the period of the asynchronous transmission mode b of the IEEE 1394 standard (Fig. 2).
  • the interval is a free time, for example, 25 sec after the above synchronous transfer mode a.
  • the IEEE 1394 node 40 is not connected to the device at this time. And transmits the data signal to the CATV transmission line 50 at the same transfer speed as described above. Therefore, even if the idle time is only a few tens of sec, the lower transfer speed is several tens kbps.
  • the above transfer speed is not restricted by the synchronous transfer mode, high-speed data communication of several hundred M to several Gbps can be performed. . Thus, bidirectional de-evening communication is possible, and the LAN can be formed.
  • the TV signal can be transmitted. This makes it possible to realize a low-cost and convenient CATV transmission system that enables the transmission and reception of data and data communication.
  • FIG. 3 shows a second embodiment of the present invention.
  • the figure is a system configuration diagram.
  • the switch device is a switch means for switching between the synchronous transfer mode and the non-synchronous transfer mode.
  • the block 90 is system-up to the IEEE 1394 and the device 190, and is read.
  • the IEEE 1394 hub device 140, the distribution device 160, and the IEEE 1394 hub device 190 are shown in FIGS. 4, 5, and 6, respectively. You
  • the IEEE 1394 node device 140 can be used for both the IEEE 1394 node, the node 141, the Ethernet port conventionally used for LANs, the node 144, and both.
  • Switch device 14 3 for switching the data sent from the hub and finger to the switch device 14 3 to detect the synchronous transfer mode. It consists of a synchronous transfer mode detection device 142 which is instructed (Fig. 4).
  • the synchronous transfer mode detection device 14 2 detects the synchronous transfer mode a in FIG. 2 and the switch device 14 only during that period. To the 144a side. As a result, IEEE 1 The time-division multiplexed signal (baseband signal of the TV signal) output from the 1394 and the 1414 is converted to the next-stage photoelectric converter (E /
  • the switch device 144 is switched to the 144b side only during that period.
  • EEE 13 94 The standard specification can be used independently of the specifications, and LAN of another specification such as IEEE 802.3 can be connected. That is, for example, the data signals (base signals, end signals) output from the IEEE 802.3 Ethernet port and the bus 144 are output. The signal is output to the next-stage photoelectric converter (E / 0).
  • this IEEE 1394-node device 140 is provided in the CATV station 5, it is possible to easily form or expand an existing LAN system. it can .
  • the distribution device 1660 is a synchronous transfer mode detection device 161, a synchronous transfer signal distribution device 162, a switch device 1664, and a switch device. — It is composed of a sunday knob 16 3 (Fig. 5).
  • the synchronous transfer mode detection device 16 1 detects the synchronous transfer mode a in FIG. 2 and only operates during that period. Switch the switch device 1664 to the 1664a side. By this operation, the transmitted time-division multiplexed signal is distributed by the next stage synchronous transmission signal distribution device 162, and the next stage photoelectric conversion is performed. Output to the converter (E / 0).
  • the switch device 1664 is switched to the 1664b side only during that period.
  • the transmitted overnight signal is separated by the next-stage Ethernet node 163, and further transmitted to the next-stage photoelectric converter (E / 0). Is output.
  • the overnight signal from the subscriber device side (downstream side) is sent out to the LAN of the other type via this Ethernet server 163. .
  • the existing LAN system can be easily formed or expanded.
  • the subscriber device IEEE 1394 hub device 190 is a synchronous transfer mode detection device 191, a switch device 1992, and an IEEE 13 It consists of 94, 193, and Ethernet 194 (Fig. 6).
  • the synchronous transfer mode detecting device 19 1 detects the synchronous transfer mode a shown in FIG. 2 and operates only during that period. Switch the switch device 1992 to the 1992a side.
  • the transmitted time-division multiplexed signal is transmitted to the next stage of the IEEE 1394 / N 193, for example, a TV device, a VTR device, or the like. It is divided into two.
  • the switch device 1992 is switched to the 1992b side only during that period.
  • the data signal transmitted by the other specification is connected to the next-stage Ethernet node 1994, is separated, and is stored in the address signal.
  • a subscriber device's combi- ing device or a sono device is sent to one device.
  • the existing LAN system can be easily formed. It can be grown or expanded.
  • the synchronous transmission mode and non-synchronized transmission mode are provided to the CATV station, the subscriber's equipment IEEE 1394 nodes, and the distributor installed in the transmission line. If a switch device that switches the synchronous transfer mode is provided, the existing LAN can be connected using the asynchronous transfer mode. And can be done.
  • CATV transmission system can be realized by enabling CS transmission, terrestrial wave digital transmission, and existing LAN connection. realizable .
  • FIG. 7 shows a third embodiment of the present invention.
  • the figure is a system configuration diagram of the subscriber device.
  • the time-division multiplexed signal for transmitting the TV signal was transmitted to each subscriber device via the CATV transmission line.
  • a feature of the present embodiment is that a time-division multiplexed TV signal is transmitted in the air with high frequency modulation.
  • the time-division multiplexed ground wave digital broadcast signal and the satellite broadcast signal are transmitted with high frequency modulation, and they are added to the receiver.
  • Device is to receive.
  • the subscriber equipment is a ground wave digital broadcasting antenna 92, a satellite broadcasting antenna 93, and an RF modem (modulator) 91. Is newly provided.
  • the subscriber unit may transmit a time-division multiplexed signal with high frequency modulation to a ground wave digital transmission antenna 92 or a satellite transmission fan.
  • the c- demodulated TV signal received by the antenna 93 and demodulated by the RF modem 91 is transmitted to the computer via the IEEE 1394 node 90.
  • Data device 82 or the TV device 84 It is.
  • the coaxial cable is used. 53 Directly connected to 3.
  • the ground wave digital transmission signal and the satellite transmission signal can be transmitted in space and time. It becomes a transmission system that can be transmitted at a multiplicity.
  • the time division multiplexed signal and the data signal from the CATV station are modulated by the intensity modulation of the optical signal.
  • a modulator / demodulator 120 is provided at the output end of the CATV station, as shown in Fig. 8. May be modulated to transmit and receive data from the coaxial cable 53.
  • the subscriber unit 80 also needs to be equipped with a modulator / demodulator 120, but if the subscriber unit is located at a short distance, the photoelectric conversion is required. Converters and optical distributors are not required, and the installation cost is reduced.
  • the optical fiber 51 and the coaxial cable 53 are mixed in the transmission line, but either one of them is used. It is also good.
  • a distributor and a distributor are inserted in the transmission line, respectively, but if necessary, a predetermined ratio may be used. It is also possible to provide a branching device or a branching device equipped with a switch device for branching the signal.
  • the third embodiment receives a time-division multiplexed TV signal.
  • an RF modem (modulator / demodulator) must be added as shown in Fig. 9.
  • the CATV transmission line optical fin, '51, or the CATV transmission line with the RF modem 88 can be used. It is only necessary to connect to the coaxial cable 53, for example, data sent from the computer unit 82 of the subscriber unit 80.
  • the signal is transmitted by the RF modem 91 with high frequency modulation (Fig. 7).
  • the transmitted RF signal is converted into a base node signal by an RF modem 87, and is converted to an optical fiber by an IEEE 1394 node 89. Ino, sent to '51 ( Figure 9).
  • the data signal in the reverse direction is transmitted to the computer device 82 of the subscriber device 80 through the reverse route. Immediately, data communication becomes possible.

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  • 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)
  • Television Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

La présente invention concerne un procédé de transmission de signaux de télévision et un système de transmission associé qui sont hautement pratiques. Dans le système de transmission de signaux de télévision, des concentrateurs IEEE1394 (40 et 90) qui sont des interfaces série à grande vitesse ayant des vitesses de transmission de plusieurs centaines de Mbps sont respectivement utilisés dans une station STAC (5) et un dispositif d'abonné (80). Des signaux de diffusion CS et des signaux de diffusion numérique par ondes de sol sont démodulés pour générer des signaux de bande de base qui sont utilisés en tant que signaux multiplex à répartition temporelle. Les signaux sont envoyés sur une ligne de transmission STAC (50) dans le mode de transfert synchrone du concentrateur IEEE1394 (40). Le concentrateur IEEE1394 (90) du dispositif d'abonné (80) reçoit les signaux et les envoie à des appareils respectifs tels qu'un poste de télévision (84). Avec ce système, les signaux de télévision sont transmis et reçus au moyen d'une seule interface en temps réel. Des signaux de données sont transférés dans les modes de transfert asynchrones des concentrateurs IEEE1394 (40 et 90). Avec ce procédé de transmission il est possible de structurer un système de transmission assurant l'émission/réception de signaux de télévision numérique et la communication de données.
PCT/JP2000/007248 1999-10-20 2000-10-18 Procede de transmission multiplex de signaux de television et systeme de transmission associe WO2001030077A1 (fr)

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AU79486/00A AU7948600A (en) 1999-10-20 2000-10-18 Television signal multiplex transmission method and transmission system therefor

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JP11/298877 1999-10-20
JP29887799A JP3660174B2 (ja) 1999-10-20 1999-10-20 テレビジョン信号多重化伝送方式及びその伝送システム

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Publication number Priority date Publication date Assignee Title
WO2003081916A1 (fr) 2002-03-26 2003-10-02 Koninklijke Philips Electronics N.V. Syntoniseur haute frequence
KR100640475B1 (ko) * 2004-07-22 2006-10-30 삼성전자주식회사 방송 통신 융합 시스템에 사용되는 통신 방송 다중화기 및역다중화기
DE102005001611C5 (de) * 2005-01-12 2009-08-27 Frimo Group Gmbh Mehrfarbige Gießhäute

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152856U (fr) * 1984-09-11 1986-04-09
JPH07255043A (ja) * 1994-01-28 1995-10-03 Sony Corp 情報提供装置
JPH10174073A (ja) * 1996-12-11 1998-06-26 Sony Corp 伝送装置および伝送方法
JPH10308756A (ja) * 1997-03-06 1998-11-17 Toshiba Corp 通信装置および通信方法
JPH11164279A (ja) * 1997-11-28 1999-06-18 Hitachi Ltd デジタル放送の送信装置
JPH11205760A (ja) * 1998-01-14 1999-07-30 Matsushita Electric Ind Co Ltd 多重化装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3737261B2 (ja) * 1997-12-08 2006-01-18 株式会社東芝 ディジタル放送受信装置及びディジタル放送受信方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152856U (fr) * 1984-09-11 1986-04-09
JPH07255043A (ja) * 1994-01-28 1995-10-03 Sony Corp 情報提供装置
JPH10174073A (ja) * 1996-12-11 1998-06-26 Sony Corp 伝送装置および伝送方法
JPH10308756A (ja) * 1997-03-06 1998-11-17 Toshiba Corp 通信装置および通信方法
JPH11164279A (ja) * 1997-11-28 1999-06-18 Hitachi Ltd デジタル放送の送信装置
JPH11205760A (ja) * 1998-01-14 1999-07-30 Matsushita Electric Ind Co Ltd 多重化装置

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