WO2010114064A1 - Conversion system, conversion device - Google Patents

Conversion system, conversion device Download PDF

Info

Publication number
WO2010114064A1
WO2010114064A1 PCT/JP2010/055941 JP2010055941W WO2010114064A1 WO 2010114064 A1 WO2010114064 A1 WO 2010114064A1 JP 2010055941 W JP2010055941 W JP 2010055941W WO 2010114064 A1 WO2010114064 A1 WO 2010114064A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
signal
television broadcast
dttv
conversion
Prior art date
Application number
PCT/JP2010/055941
Other languages
French (fr)
Japanese (ja)
Inventor
順 植村
寿行 小沢
洋之 西牟田
雄介 岡田
Original Assignee
マスプロ電工株式会社
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 マスプロ電工株式会社 filed Critical マスプロ電工株式会社
Publication of WO2010114064A1 publication Critical patent/WO2010114064A1/en

Links

Images

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
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level

Definitions

  • the present invention relates to a conversion system that receives a digital television broadcast signal, generates a video signal, etc., converts the generated video signal or the like into a broadcast signal of an analog television broadcast, and transmits the converted signal.
  • a tuner for digital terrestrial television broadcasting (hereinafter also referred to as DTTV) is externally attached to an analog television (hereinafter also referred to as ATV) receiver, and a video signal or the like output from the tuner is ATV-received via a video terminal or the like. It has been proposed to view a DTTV program using an ATV receiver.
  • in-vehicle ATV receivers are not provided with a video input terminal or the like (hereinafter referred to as a video terminal), and there are many models in which a tuner for DTTV cannot be externally attached.
  • a conversion device that enables viewing of a DTTV program using such an ATV receiver is described.
  • the conversion device receives a DTTV signal, generates a video signal and an audio signal, converts the generated signals into an ATV signal, and transmits the ATV signal. Then, by receiving the ATV signal transmitted from the conversion device, it is possible to view a DTTV program on an in-vehicle ATV receiver that is not provided with a video terminal.
  • the conversion device described in Patent Document 1 is provided with an antenna for receiving a DTTV signal and an antenna for transmitting an ATV signal, and simply receives the DTTV signal and generates a video signal and an audio signal. Compared to the case, the number of parts increases.
  • the present invention has been made in order to solve the above-mentioned problems, and is capable of converting a video signal of a digital TV broadcast program into a broadcast signal of an analog TV broadcast and transmitting it while suppressing an increase in the number of parts.
  • the purpose is to provide a system.
  • a first aspect of the present invention made to achieve such an object is a conversion system comprising: An antenna unit impedance-matched to be suitable for receiving radio waves in digital television broadcasting; A converter for receiving a digital television broadcast signal from the antenna section via a transmission line, The converter is Extraction means for extracting a video signal and an audio signal corresponding to a digital television broadcast channel designated by a user from the digital television broadcast signal received from the antenna unit; The video signal and the audio signal extracted by the extraction unit are converted into an analog television broadcast signal having a frequency corresponding to any channel, and the analog television broadcast signal is converted into an analog television via the antenna unit. Conversion means for transmitting to a receiving device for viewing the broadcast; It is characterized by providing.
  • a second aspect of the present invention is the conversion system according to the first aspect, wherein the antenna unit is based on an antenna element for receiving a radio wave in digital television broadcasting and a radio wave received by the antenna element. And a first amplifying means for amplifying only the digital television broadcast signal among the received signals and transmitting the amplified signal to the converter.
  • a third aspect of the present invention is the conversion system according to the second aspect, wherein the antenna unit further includes second amplification means for amplifying only an analog television broadcast signal among transmission signals from the conversion device. It is characterized by providing.
  • a fourth aspect of the present invention there is provided the conversion system according to the first to third aspects, wherein the antenna unit is configured as a film antenna.
  • a fifth aspect of the present invention is a conversion device, A video signal and an audio signal corresponding to a digital television broadcast channel designated by a user from a digital television broadcast signal received via a transmission path from an antenna unit impedance-matched so as to be suitable for radio wave reception in digital television broadcast Extracting means for extracting The video signal and the audio signal extracted by the extraction unit are converted into an analog television broadcast signal having a frequency corresponding to any channel, and the analog television broadcast signal is converted into an analog television via the antenna unit.
  • the conversion system includes an antenna unit that is impedance-matched so as to be suitable for reception of radio waves in digital television broadcasting, and a conversion device that receives digital television broadcast signals from the antenna unit.
  • the extraction means included in the conversion device extracts a video signal and an audio signal from the digital television broadcast signal received via the antenna unit, and the conversion means converts the extracted video signal or the like into an analog television broadcast signal. Then, the data is transmitted to a receiving device for viewing analog television broadcast via the antenna unit.
  • the receiving device may be, for example, an analog television receiver.
  • the antenna unit in the conversion system of the first aspect in the vicinity of the antenna of the receiving device, it becomes possible to view digital television broadcast using this receiving device.
  • this conversion system reception of digital TV broadcast radio waves and transmission of converted analog TV broadcast signals are performed using the same antenna. For this reason, it is possible to convert a digital television broadcast program video signal or the like into an analog television broadcast signal and transmit it to the receiving device while suppressing an increase in the number of parts.
  • the antenna unit is impedance matched so as to be suitable for reception of digital television broadcast radio waves, and loss occurs when radiating analog television broadcast radio waves.
  • this antenna unit in the vicinity of the antenna of the receiving device, it is possible to transmit an analog television broadcast signal with sufficient strength to the receiving device.
  • reflection occurs near the contact point with the transmission line, and this reflection uses an antenna that is impedance matched suitable for analog television broadcast.
  • a stronger electromagnetic induction can be generated for the conductor existing in the vicinity of the antenna portion.
  • the antenna unit is arranged near the antenna of the receiving device, it is considered that the transmission of analog television broadcast signals is facilitated by this electromagnetic induction.
  • the directivity is provided in the receiving antenna for television broadcasting in order to improve the receiving sensitivity.
  • the directivity of each antenna is taken into consideration so that both the reception state of the television broadcast radio wave and the transmission state from the antenna unit to the antenna of the receiving device are good. It is necessary to determine the orientation and positional relationship of the antenna. That is, when antennas having directivity are used as antennas or antennas for receiving devices, the arrangement of these antennas is limited.
  • the transmission state from the conversion device to the reception device is improved by simply arranging the antenna unit in the state of being close to the antenna of the reception device. It is possible to increase the degree of freedom with respect to the arrangement of each antenna.
  • the antenna unit amplifies only the digital TV broadcast signal among the antenna element for receiving radio waves in digital TV broadcast and the received signal from the antenna element, and causes the conversion device to First amplification means for transmitting.
  • the antenna unit further includes second amplification means for amplifying only the analog television broadcast signal among the transmission signals from the conversion device.
  • the antenna unit is configured as a film antenna.
  • the antenna unit can be attached to the window of the vehicle.
  • the antenna unit can be easily disposed in the state of being close to the antenna of the receiving device.
  • the conversion device of the fifth aspect receives a digital television broadcast signal via a transmission line from an antenna unit impedance matched so as to be suitable for reception of radio waves in digital television broadcast.
  • the extraction means included in the conversion device extracts a video signal and an audio signal from the digital television broadcast signal received via the antenna unit, and the conversion means converts the extracted video signal or the like into an analog television broadcast signal. Then, the data is transmitted to a receiving device for viewing analog television broadcast via the antenna unit.
  • the conversion system of the present invention can be constructed, and the above-described effects can be obtained.
  • FIG. 1A is a block diagram illustrating a configuration of a conversion system in the embodiment
  • FIG. 1B is a block diagram illustrating a configuration of a DTTV reception device included in the conversion system.
  • 2A is a block diagram illustrating a configuration of a DTTV antenna
  • FIG. 2B is a block diagram illustrating a configuration of a power feeding unit included in the DTTV antenna.
  • FIG. 3A is a block diagram illustrating a configuration of a core wire side power supply terminal included in the power supply unit
  • FIG. 3B is a block diagram illustrating a configuration of a modified example of the core wire side power supply terminal. It is a block diagram which shows the structure of the modification of a DTTV receiver.
  • DESCRIPTION OF SYMBOLS 10 ... Conversion system, 100 ... DTTV receiver, 110 ... Connector, 120 ... Diplexer, 130 ... DTTV tuner part, 140 ... Modulation circuit, 150 ... Branch circuit, 160 ... Remote control receiving part, 170 ... Control part, 200 ... DTTV Antennas, 210 ... transparent film, 221 ... antenna element, 222 ... antenna element, 230 ... feeding part, 231 ... core wire side feeding terminal, 231a ... contact, 231b ... diplexer, 231c ... amplifier circuit, 231d ... diplexer, 231e ... amplification Circuits, 231f ... LPF, 231g ... contacts, 232 ... outer conductor side power supply terminals, 300 ... coaxial cable, 310 ... core wire, 320 ... outer conductor, 400 ... audio device, 500 ... analog broadcasting antenna.
  • a conversion system 10 according to the present embodiment shown in FIG. 1A is mounted on a vehicle (not shown).
  • the vehicle is used for VHF band and UHF band radio waves, AM and FM radio broadcasting.
  • An analog broadcast antenna 500 capable of receiving radio waves, and an audio device 400 connected to the antenna and capable of viewing ATV and listening to radio broadcasts are mounted.
  • the conversion system 10 also includes a DTTV antenna 200 for receiving UHF band radio waves, and a DTTV receiver 100 connected to the DTTV antenna 200 via a coaxial cable 300.
  • the DTTV antenna 200 and the analog broadcast antenna 500 are configured as film antennas, and these antennas are arranged close to each other. Specifically, for example, these antennas may be attached to a vehicle window in a state of being adjacent to each other, or may be attached in an overlapped state.
  • the DTTV receiver 100 includes a connector 110 to which a coaxial cable 300 is connected and a reception signal is input from the DTTV antenna 200, and an upper limit frequency of the VHF band.
  • a diplexer 120 having a lower frequency cut-off frequency and a lower limit frequency of the UHF band as a high-frequency cut-off frequency, and a high-frequency received signal (DTTV signal) passing through the diplexer 120 are demodulated.
  • DTTV tuner unit 130 that extracts a video signal and an audio signal corresponding to a channel designated by a user via a remote controller or the like, and a video signal from the DTTV tuner unit 130 corresponds to a VHF band channel in ATV.
  • Modulation circuit 140 that modulates a carrier wave to generate an ATV signal is doing. The ATV signal generated by the modulation circuit 140 is output from the connector 110 via the diplexer 120.
  • a DTTV antenna 200 includes a transparent film 210 attached to a vehicle window, antenna elements 221 and 222 covered with the transparent film 210, A power feeding unit 230 serving as a power feeding point for the antenna elements 221 and 222 is provided.
  • the DTTV antenna 200 and the coaxial cable 300 are impedance matched so as to be suitable for reception of radio waves in the UHF band.
  • the power feeding unit 230 connects the core wire side power supply terminal 231 that connects the core wire 310 of the coaxial cable 300 and the antenna element 221, and the outer conductor 320 of the coaxial cable 300 and the antenna element 222. And an external conductor side power supply terminal 232.
  • the core wire side power supply terminal 231 amplifies the reception signal (DTTV signal) from the antenna element 221 and outputs the amplified signal to the DTTV reception device 100, and also transmits the transmission signal from the DTTV reception device 100.
  • ATV signal is amplified and output to the antenna element 221.
  • the core wire side power supply terminal 231 receives the contact 231a with the antenna element 221, the reception signal from the contact 231a, and the transmission signal amplified by the amplifier circuit 231e, and cuts the upper limit frequency of the VHF band to the lower band side.
  • a diplexer 231b having a lower frequency in the UHF band as a high-frequency cutoff frequency and an amplifying circuit 231c for amplifying a high-frequency received signal that has passed through the diplexer 231b are provided.
  • the core wire side power supply terminal 231 includes a contact 231g with the core wire 310 of the coaxial cable 300, an LPF (Low Pass Filter) 231f that cuts a signal having a frequency higher than the UHF band from a transmission signal input from the contact 231g,
  • LPF Low Pass Filter
  • the reception signal from the amplifier circuit 231c and the transmission signal from the LPF 231f are input, and the upper limit frequency of the VHF band is set to the cut-off frequency on the low frequency side, and the lower limit frequency of the UHF band is set to the cut-off frequency on the high frequency side.
  • a diplexer 231d, and an amplifying circuit 231e that amplifies the low-frequency transmission signal that has passed through the diplexer 231d.
  • an HF radio wave (DTTV signal) is received by the DTTV antenna 200.
  • This DTTV signal passes through the contact 231a and the diplexer 231b at the core wire side power supply terminal 231 and is input to the amplifier circuit 231c. Then, after being amplified by the amplifier circuit 231c, it is output to the DTTV receiver 100 via the diplexer 231d, the LPF 231f, and the contact 231g.
  • a video signal and an audio signal corresponding to a channel designated by the user are extracted from the DTTV signal received from the DTTV antenna 200, and these signals are, for example, ATV corresponding to one channel. It is converted into a signal and output from the connector 110.
  • the ATV signal transmitted from the DTTV receiving apparatus 100 may be in the VHF band, and may correspond to any one of the VHF television channels (channels 1 to 12 in Japan).
  • the VHF band ATV signal output from the DTTV receiver 100 is input to the amplifier circuit 231e through the contacts 231g, the LPF 231f, and the diplexer 231d at the core-side power supply terminal 231. Then, after being amplified by the amplifier circuit 231e, it is output to the antenna element 221 through the diplexer 231b and the contact 231a.
  • the VHF band ATV signal for viewing DTTV generated by the DTTV receiving apparatus 100 is transmitted from the antenna element 221 and received by the audio apparatus 400 via the analog broadcasting antenna 500.
  • the audio device 400 connected to the analog broadcast antenna 500 can view the DTTV. It becomes possible. Further, in this conversion system 10, reception of digital broadcast radio waves and transmission of converted ATV signals are performed using the same antenna. For this reason, it is possible to convert a video signal or the like of a digital television broadcast program into an ATV signal and transmit it to the audio apparatus 400 while suppressing an increase in the number of parts.
  • the DTTV antenna 200 is impedance-matched so as to be suitable for receiving DTTV radio waves, and loss occurs when radiating ATV radio waves.
  • the DTTV antenna 200 in the vicinity of the analog broadcast antenna 500, it is possible to transmit an ATV signal having a sufficient strength to the audio apparatus 400.
  • ATV radio waves are radiated through the DTTV antenna 200, reflection occurs near the contact point with the coaxial cable 300.
  • an antenna having impedance matching suitable for ATV is used.
  • stronger electromagnetic induction can be generated for the conductor existing in the vicinity of the DTTV antenna 200.
  • the DTTV antenna 200 is disposed in the vicinity of the analog broadcast antenna 500, it is considered that the transmission of the ATV signal is facilitated by this electromagnetic induction.
  • the directivity is provided in the receiving antenna for television broadcasting in order to improve the receiving sensitivity.
  • the directivity of each antenna is taken into consideration so that both the reception state of the television broadcast radio wave and the transmission state from the DTTV antenna 200 to the analog broadcast antenna 500 are good. It is necessary to determine the orientation and positional relationship of these antennas. That is, when a directional antenna is used as the DTTV antenna 200 or the analog broadcast antenna 500, the arrangement of these antennas is limited.
  • the conversion system 10 the transmission state from the conversion system 10 to the audio device 400 is improved by simply disposing the DTTV antenna 200 in the vicinity of the analog broadcasting antenna 500. It is possible to increase the degree of freedom regarding the antenna arrangement.
  • a signal in the UHF band which is a frequency band corresponding to DTTV, is amplified among the received signals from the antenna element. For this reason, the DTTV receiving state in the DTTV receiving apparatus 100 can be improved.
  • a signal in the VHF band among the transmission signals from the DTTV receiver 100 is amplified.
  • the VHF band transmission signal that has passed through the diplexer 231d of the core wire side feed terminal 231 in the DTTV antenna 200 is amplified by the amplifier circuit 231e and then transmitted from the antenna element 221.
  • the VHF band transmission signal that has passed through the diplexer 231d may be directly input to the diplexer 231b. Even in such a case, an ATV signal for viewing DTTV can be transmitted from the DTTV receiving apparatus 100 to the audio apparatus 400.
  • the DTTV antenna 200 and the analog broadcast antenna 500 are configured as film antennas.
  • these antennas may be antennas other than the film antenna. Even if it has such a structure, the same effect can be acquired.
  • the DTTV receiving apparatus 100 may receive a signal from a remote controller (not shown) via a UHF band radio wave.
  • the UHF band radio wave may be, for example, a 469 MHz radio wave that does not overlap with the band used in DTTV.
  • the DTTV receiver 100 further includes a branch circuit 150 to which a high-frequency received signal that has passed through the diplexer 120 is input, and a branch circuit 150.
  • a remote control receiving unit 160 that extracts a received signal having a frequency corresponding to the remote controller from the one of the branched received signals, and a DTTV according to the received signal from the remote controller extracted by the remote control receiving unit 160
  • a control unit 170 that gives instructions to the tuner unit 130 and the modulation circuit 140.
  • the other received signal branched by the branch circuit 150 is input to the DTTV tuner unit 130, and an ATV signal for viewing DTTV is generated and output based on this received signal.
  • a signal is transmitted from a remote controller via infrared rays.
  • a light receiving unit it is necessary to arrange a light receiving unit on a bonnet or the like that is visible to the user.
  • the light receiving unit is not necessary.
  • the DTTV receiving apparatus 100 is assumed to be disposed, for example, under the seat of the vehicle. For example, when an antenna is provided inside the housing of the DTTV receiving apparatus 100, reception is performed. Becomes difficult. However, by using the UHF band radio wave, for example, it is possible to efficiently receive a signal from the remote controller using the DTTV antenna 200 arranged in a state of being attached to a vehicle window. .
  • the DTTV receiving device 100 is an example of the conversion device of the present invention
  • the DTTV antenna 200 is an example of the antenna unit of the present invention
  • the audio device 400 is an example of the receiving device of the present invention.
  • the DTTV tuner unit 130 is an example of the extraction unit of the present invention
  • the modulation circuit 140 is an example of the conversion unit of the present invention
  • the amplifier circuit 231c is an example of the first amplification unit of the present invention.
  • the amplifying circuit 231e is an example of a second amplifying unit of the present invention.

Abstract

A conversion system is provided with an antenna unit and a conversion device. The conversion device is provided with an extraction means and a conversion means. The extraction means extracts a video signal and an audio signal corresponding to the channel of a digital television broadcast designated by a user from a digital television broadcast signal received from the antenna unit. The conversion means converts the video signal and the audio signal extracted by the extraction means to an analog television broadcast signal at a frequency corresponding to any one channel, and transmits the analog television broadcast signal through the antenna unit to a receiver for viewing an analog television broadcast.

Description

変換システム、変換装置Conversion system, conversion device
　本発明は、デジタルテレビ放送信号を受信して映像信号等を生成し、生成した映像信号等をアナログテレビ放送の放送信号に変換して送信する変換システムに関する。 The present invention relates to a conversion system that receives a digital television broadcast signal, generates a video signal, etc., converts the generated video signal or the like into a broadcast signal of an analog television broadcast, and transmits the converted signal.
　地上デジタルテレビ放送（以後、ＤＴＴＶとも記載）用のチューナをアナログテレビ（以後、ＡＴＶとも記載）受像器に外付けし、このチューナから出力される映像信号等を、映像端子等を介してＡＴＶ受像器に入力し、ＡＴＶ受像器を用いてＤＴＴＶの番組を視聴することが提案されている。 A tuner for digital terrestrial television broadcasting (hereinafter also referred to as DTTV) is externally attached to an analog television (hereinafter also referred to as ATV) receiver, and a video signal or the like output from the tuner is ATV-received via a video terminal or the like. It has been proposed to view a DTTV program using an ATV receiver.
　また、車載用のＡＴＶ受像器には、映像入力端子等（以下、映像端子）が設けられておらず、ＤＴＴＶ用のチューナを外付けすることができない機種が多いが、特許文献１には、このようなＡＴＶ受像器を用いたＤＴＴＶの番組の視聴を可能とする変換装置について記載されている。この変換装置は、ＤＴＴＶ信号を受信して映像信号及び音声信号を生成し、生成したこれらの信号をＡＴＶ信号に変換して送信する。そして、変換装置から送信されたＡＴＶ信号を受信することにより、映像端子が設けられていない車載用のＡＴＶ受像器にて、ＤＴＴＶの番組の視聴が可能となる。 In addition, in-vehicle ATV receivers are not provided with a video input terminal or the like (hereinafter referred to as a video terminal), and there are many models in which a tuner for DTTV cannot be externally attached. A conversion device that enables viewing of a DTTV program using such an ATV receiver is described. The conversion device receives a DTTV signal, generates a video signal and an audio signal, converts the generated signals into an ATV signal, and transmits the ATV signal. Then, by receiving the ATV signal transmitted from the conversion device, it is possible to view a DTTV program on an in-vehicle ATV receiver that is not provided with a video terminal.
登録実用新案第３１３６１５４号公報Registered Utility Model No. 3136154
　しかしながら、特許文献１に記載の変換装置は、ＤＴＴＶ信号を受信するアンテナと、ＡＴＶ信号を送信するためのアンテナが個別に設けられており、単にＤＴＴＶ信号を受信して映像信号や音声信号を生成する場合に比べ、部品点数が増加してしまう。 However, the conversion device described in Patent Document 1 is provided with an antenna for receiving a DTTV signal and an antenna for transmitting an ATV signal, and simply receives the DTTV signal and generates a video signal and an audio signal. Compared to the case, the number of parts increases.
　本願発明は上記課題を解決するためになされたものであり、部品点数の増加を抑えつつ、デジタルテレビ放送の番組の映像信号を、アナログテレビ放送における放送信号に変換して送信することができる変換システムを提供することを目的とする。 The present invention has been made in order to solve the above-mentioned problems, and is capable of converting a video signal of a digital TV broadcast program into a broadcast signal of an analog TV broadcast and transmitting it while suppressing an increase in the number of parts. The purpose is to provide a system.
　かかる目的を達成するためになされた本発明の第１局面は、変換システムであって、
　デジタルテレビ放送における電波の受信に適するようにインピーダンス整合されたアンテナ部と、
　該アンテナ部から伝送線路を介してデジタルテレビ放送信号を受信する変換装置と
　を備え、
　前記変換装置は、
　前記アンテナ部から受信したデジタルテレビ放送信号から、ユーザにより指定されたデジタルテレビ放送のチャンネルに対応する映像信号と音声信号とを抽出する抽出手段と、
　前記抽出手段により抽出された前記映像信号と前記音声信号とを、いずれかのチャンネルに対応する周波数のアナログテレビ放送信号に変換し、該アナログテレビ放送信号を、前記アンテナ部を介して、アナログテレビ放送を視聴するための受信装置に対して送信する変換手段と、
　を備えることを特徴とする。 A first aspect of the present invention made to achieve such an object is a conversion system comprising:
An antenna unit impedance-matched to be suitable for receiving radio waves in digital television broadcasting;
A converter for receiving a digital television broadcast signal from the antenna section via a transmission line,
The converter is
Extraction means for extracting a video signal and an audio signal corresponding to a digital television broadcast channel designated by a user from the digital television broadcast signal received from the antenna unit;
The video signal and the audio signal extracted by the extraction unit are converted into an analog television broadcast signal having a frequency corresponding to any channel, and the analog television broadcast signal is converted into an analog television via the antenna unit. Conversion means for transmitting to a receiving device for viewing the broadcast;
It is characterized by providing.
　また、本発明の第２局面は、第１局面の変換システムであって、前記アンテナ部は、デジタルテレビ放送における電波を受信するためのアンテナ素子と、前記アンテナ素子にて受信された電波に基づく受信信号のうち、デジタルテレビ放送信号のみを増幅させ、前記変換装置に送信する第一の増幅手段とを備えることを特徴とする。 A second aspect of the present invention is the conversion system according to the first aspect, wherein the antenna unit is based on an antenna element for receiving a radio wave in digital television broadcasting and a radio wave received by the antenna element. And a first amplifying means for amplifying only the digital television broadcast signal among the received signals and transmitting the amplified signal to the converter.
　また、本発明の第３局面は、第２局面の変換システムであって、前記アンテナ部は、前記変換装置からの送信信号のうち、アナログテレビ放送信号のみを増幅させる第二の増幅手段をさらに備えることを特徴とする。 A third aspect of the present invention is the conversion system according to the second aspect, wherein the antenna unit further includes second amplification means for amplifying only an analog television broadcast signal among transmission signals from the conversion device. It is characterized by providing.
　また、本発明の第４局面は、第１局面から第３局面の変換システムであって、前記アンテナ部は、フィルムアンテナとして構成されていることを特徴とする。
　また、本発明の第５局面は、変換装置であって、
　デジタルテレビ放送における電波の受信に適するようにインピーダンス整合されたアンテナ部から伝送経路を介して受信したデジタルテレビ放送信号から、ユーザにより指定されたデジタルテレビ放送のチャンネルに対応する映像信号と音声信号とを抽出する抽出手段と、
　前記抽出手段により抽出された前記映像信号と前記音声信号とを、いずれかのチャンネルに対応する周波数のアナログテレビ放送信号に変換し、該アナログテレビ放送信号を、前記アンテナ部を介して、アナログテレビ放送を視聴するための受信装置に対して送信する変換手段と、
　を備えることを特徴とする。 According to a fourth aspect of the present invention, there is provided the conversion system according to the first to third aspects, wherein the antenna unit is configured as a film antenna.
A fifth aspect of the present invention is a conversion device,
A video signal and an audio signal corresponding to a digital television broadcast channel designated by a user from a digital television broadcast signal received via a transmission path from an antenna unit impedance-matched so as to be suitable for radio wave reception in digital television broadcast Extracting means for extracting
The video signal and the audio signal extracted by the extraction unit are converted into an analog television broadcast signal having a frequency corresponding to any channel, and the analog television broadcast signal is converted into an analog television via the antenna unit. Conversion means for transmitting to a receiving device for viewing the broadcast;
It is characterized by providing.
　第１局面の変換システムは、デジタルテレビ放送における電波の受信に適するようにインピーダンス整合されたアンテナ部と、該アンテナ部からデジタルテレビ放送信号を受信する変換装置とを有している。そして、変換装置が備える抽出手段は、アンテナ部を介して受信したデジタルテレビ放送信号から映像信号と音声信号とを抽出し、変換手段は、抽出された映像信号等をアナログテレビ放送信号に変換し、アンテナ部を介してアナログテレビ放送を視聴するための受信装置に対して送信する。尚、受信装置とは、例えば、アナログテレビ受像器であっても良い。 The conversion system according to the first aspect includes an antenna unit that is impedance-matched so as to be suitable for reception of radio waves in digital television broadcasting, and a conversion device that receives digital television broadcast signals from the antenna unit. The extraction means included in the conversion device extracts a video signal and an audio signal from the digital television broadcast signal received via the antenna unit, and the conversion means converts the extracted video signal or the like into an analog television broadcast signal. Then, the data is transmitted to a receiving device for viewing analog television broadcast via the antenna unit. The receiving device may be, for example, an analog television receiver.
　したがって、第１局面の変換システムにおけるアンテナ部を、受信装置のアンテナの付近に設置することにより、この受信装置を用いてデジタルテレビ放送を視聴することが可能となる。また、この変換システムでは、デジタルテレビ放送の電波の受信と、変換されたアナログテレビ放送信号の送信とを同じアンテナを用いて行なわれている。このため、部品点数の増加を抑えつつ、デジタルテレビ放送の番組の映像信号等をアナログテレビ放送の信号に変換して受信装置に送信することができる。 Therefore, by installing the antenna unit in the conversion system of the first aspect in the vicinity of the antenna of the receiving device, it becomes possible to view digital television broadcast using this receiving device. In this conversion system, reception of digital TV broadcast radio waves and transmission of converted analog TV broadcast signals are performed using the same antenna. For this reason, it is possible to convert a digital television broadcast program video signal or the like into an analog television broadcast signal and transmit it to the receiving device while suppressing an increase in the number of parts.
　尚、第１局面の変換システムでは、アンテナ部は、デジタルテレビ放送の電波の受信に適するようにインピーダンス整合がされており、アナログテレビ放送の電波を放射する際には損失が生じてしまう。しかしながら、このアンテナ部が受信装置のアンテナの付近に配置されることにより、受信装置に対して十分な強度のアナログテレビ放送信号の送信が可能となる。また、アンテナ部を介してアナログテレビ放送の電波を放射する際には、伝送線路との接点付近で反射が生じるが、この反射により、アナログテレビ放送に適したインピーダンス整合がされているアンテナを用いる場合に比べ、アンテナ部の付近に存在する導体に対し、より強力な電磁誘導を発生させることができると考えられる。これにより、アンテナ部を受信装置のアンテナの付近に配置した場合には、この電磁誘導により、アナログテレビ放送信号の伝達が助長されると考えられる。 In the conversion system of the first aspect, the antenna unit is impedance matched so as to be suitable for reception of digital television broadcast radio waves, and loss occurs when radiating analog television broadcast radio waves. However, by arranging this antenna unit in the vicinity of the antenna of the receiving device, it is possible to transmit an analog television broadcast signal with sufficient strength to the receiving device. Also, when radiating analog television broadcast radio waves through the antenna section, reflection occurs near the contact point with the transmission line, and this reflection uses an antenna that is impedance matched suitable for analog television broadcast. Compared to the case, it is considered that a stronger electromagnetic induction can be generated for the conductor existing in the vicinity of the antenna portion. Thus, when the antenna unit is arranged near the antenna of the receiving device, it is considered that the transmission of analog television broadcast signals is facilitated by this electromagnetic induction.
　また、テレビ放送の受信用アンテナには、受信感度を向上させるために指向性が設けられている場合がある。このようなアンテナが用いられる場合には、テレビ放送電波の受信状態と、アンテナ部から受信装置のアンテナへの送信状態との両方が良好となるよう、各アンテナの指向性を考慮してこれらのアンテナの向きや位置関係を定める必要がある。つまり、指向性を有するアンテナがアンテナ部や受信装置のアンテナとして用いられている場合には、これらのアンテナの配置態様が制限されてしまうのである。これに対し、第１局面の変換システムによれば、単に、受信装置のアンテナに近接した状態でアンテナ部を配置することにより、変換装置から受信装置に対しての送信状態を良好なものにすることができ、各アンテナの配置に関しての自由度を増加させることができるのである。 Also, there is a case where the directivity is provided in the receiving antenna for television broadcasting in order to improve the receiving sensitivity. When such an antenna is used, the directivity of each antenna is taken into consideration so that both the reception state of the television broadcast radio wave and the transmission state from the antenna unit to the antenna of the receiving device are good. It is necessary to determine the orientation and positional relationship of the antenna. That is, when antennas having directivity are used as antennas or antennas for receiving devices, the arrangement of these antennas is limited. On the other hand, according to the conversion system of the first aspect, the transmission state from the conversion device to the reception device is improved by simply arranging the antenna unit in the state of being close to the antenna of the reception device. It is possible to increase the degree of freedom with respect to the arrangement of each antenna.
　また、第２局面の変換システムにおいては、アンテナ部は、デジタルテレビ放送における電波を受信するためのアンテナ素子と、アンテナ素子からの受信信号のうち、デジタルテレビ放送信号のみを増幅させ、変換装置に送信する第一の増幅手段とを備える。 In the conversion system of the second aspect, the antenna unit amplifies only the digital TV broadcast signal among the antenna element for receiving radio waves in digital TV broadcast and the received signal from the antenna element, and causes the conversion device to First amplification means for transmitting.
　こうすることにより、変換装置におけるデジタルテレビ放送信号の受信状態を、より良好なものとすることができる。
　また、第３局面の変換システムにおいては、アンテナ部は、変換装置からの送信信号のうち、アナログテレビ放送信号のみを増幅させる第二の増幅手段をさらに備える。 By doing so, the reception state of the digital television broadcast signal in the conversion device can be made better.
In the conversion system of the third aspect, the antenna unit further includes second amplification means for amplifying only the analog television broadcast signal among the transmission signals from the conversion device.
　こうすることにより、変換装置にてアナログテレビ放送信号を増幅して送信する場合に比べ、アナログテレビ放送信号が伝送線路を伝達する際に生じる電磁誘導を抑制することができる。したがって、伝送線路の付近に配置されている装置におけるノイズの発生を抑えることが可能となる。 By doing so, it is possible to suppress electromagnetic induction that occurs when the analog television broadcast signal is transmitted through the transmission line, as compared with the case where the analog television broadcast signal is amplified and transmitted by the conversion device. Therefore, it is possible to suppress the generation of noise in the device arranged near the transmission line.
　また、第４局面の変換システムにおいて、アンテナ部は、フィルムアンテナとして構成されている。
　こうすることにより、例えば、変換システムが車両に搭載されている場合には、この車両のウインドウにアンテナ部を貼り付けることが可能となる。このため、例えば、この車両に搭載されている受信装置のアンテナがフィルムアンテナとして構成されている場合には、容易に、アンテナ部を受信装置のアンテナに近接した状態で配置することができる。 In the conversion system of the fourth aspect, the antenna unit is configured as a film antenna.
By doing so, for example, when the conversion system is mounted on a vehicle, the antenna unit can be attached to the window of the vehicle. For this reason, for example, when the antenna of the receiving device mounted on the vehicle is configured as a film antenna, the antenna unit can be easily disposed in the state of being close to the antenna of the receiving device.
　また、第５局面の変換装置は、デジタルテレビ放送における電波の受信に適するようにインピーダンス整合されたアンテナ部から、伝送線路を介してデジタルテレビ放送信号を受信する。そして、変換装置が備える抽出手段は、アンテナ部を介して受信したデジタルテレビ放送信号から映像信号と音声信号とを抽出し、変換手段は、抽出された映像信号等をアナログテレビ放送信号に変換し、アンテナ部を介してアナログテレビ放送を視聴するための受信装置に対して送信する。 In addition, the conversion device of the fifth aspect receives a digital television broadcast signal via a transmission line from an antenna unit impedance matched so as to be suitable for reception of radio waves in digital television broadcast. The extraction means included in the conversion device extracts a video signal and an audio signal from the digital television broadcast signal received via the antenna unit, and the conversion means converts the extracted video signal or the like into an analog television broadcast signal. Then, the data is transmitted to a receiving device for viewing analog television broadcast via the antenna unit.
　したがって、このような変換装置を使用すれば本発明の変換システムを構築することができ、上述した効果を得ることができる。 Therefore, if such a conversion device is used, the conversion system of the present invention can be constructed, and the above-described effects can be obtained.
図１Ａは、実施形態における変換システムの構成を示すブロック図であり、図１Ｂは、この変換システムに含まれるＤＴＴＶ受信装置の構成を示すブロック図である。FIG. 1A is a block diagram illustrating a configuration of a conversion system in the embodiment, and FIG. 1B is a block diagram illustrating a configuration of a DTTV reception device included in the conversion system. 図２Ａは、ＤＴＴＶ用アンテナの構成を示すブロック図であり、図２Ｂは、このＤＴＴＶ用アンテナに含まれる給電部の構成を示すブロック図である。2A is a block diagram illustrating a configuration of a DTTV antenna, and FIG. 2B is a block diagram illustrating a configuration of a power feeding unit included in the DTTV antenna. 図３Ａは、給電部に含まれる芯線側給電端子の構成を示すブロック図であり、図３Ｂは、芯線側給電端子の変形例の構成を示すブロック図である。FIG. 3A is a block diagram illustrating a configuration of a core wire side power supply terminal included in the power supply unit, and FIG. 3B is a block diagram illustrating a configuration of a modified example of the core wire side power supply terminal. ＤＴＴＶ受信装置の変形例の構成を示すブロック図である。It is a block diagram which shows the structure of the modification of a DTTV receiver.
　１０…変換システム、１００…ＤＴＴＶ受信装置、１１０…コネクタ、１２０…ダイプレクサ、１３０…ＤＴＴＶチューナ部、１４０…変調回路、１５０…分岐回路、１６０…リモートコントロール受信部、１７０…制御部、２００…ＤＴＴＶ用アンテナ、２１０…透明フィルム、２２１…アンテナ素子、２２２…アンテナ素子、２３０…給電部、２３１…芯線側給電端子、２３１ａ…接点、２３１ｂ…ダイプレクサ、２３１ｃ…増幅回路、２３１ｄ…ダイプレクサ、２３１ｅ…増幅回路、２３１ｆ…ＬＰＦ、２３１ｇ…接点、２３２…外部導体側給電端子、３００…同軸ケーブル、３１０…芯線、３２０…外部導体、４００…オーディオ装置、５００…アナログ放送用アンテナ。 DESCRIPTION OF SYMBOLS 10 ... Conversion system, 100 ... DTTV receiver, 110 ... Connector, 120 ... Diplexer, 130 ... DTTV tuner part, 140 ... Modulation circuit, 150 ... Branch circuit, 160 ... Remote control receiving part, 170 ... Control part, 200 ... DTTV Antennas, 210 ... transparent film, 221 ... antenna element, 222 ... antenna element, 230 ... feeding part, 231 ... core wire side feeding terminal, 231a ... contact, 231b ... diplexer, 231c ... amplifier circuit, 231d ... diplexer, 231e ... amplification Circuits, 231f ... LPF, 231g ... contacts, 232 ... outer conductor side power supply terminals, 300 ... coaxial cable, 310 ... core wire, 320 ... outer conductor, 400 ... audio device, 500 ... analog broadcasting antenna.
　以下、本発明の実施形態について図面を用いて説明する。尚、本発明の実施の形態は、下記の実施形態に何ら限定されることはなく、本発明の技術的範囲に属する限り種々の形態を採りうる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments of the present invention are not limited to the following embodiments, and various forms can be adopted as long as they belong to the technical scope of the present invention.
　［構成の説明］
　（１）変換システムの構成について
　図１Ａに示す本実施形態における変換システム１０は、図示しない車両に搭載されており、この車両には、ＶＨＦ帯，ＵＨＦ帯の電波と、ＡＭ，ＦＭラジオ放送の電波の受信が可能なアナログ放送用アンテナ５００と、該アンテナに接続されており、ＡＴＶの視聴やラジオ放送の聴取が可能なオーディオ装置４００とが搭載されている。また、変換システム１０は、ＵＨＦ帯の電波を受信するためのＤＴＴＶ用アンテナ２００と、ＤＴＴＶ用アンテナ２００に同軸ケーブル３００を介して接続されているＤＴＴＶ受信装置１００とを有している。 [Description of configuration]
(1) Configuration of Conversion System A conversion system 10 according to the present embodiment shown in FIG. 1A is mounted on a vehicle (not shown). The vehicle is used for VHF band and UHF band radio waves, AM and FM radio broadcasting. An analog broadcast antenna 500 capable of receiving radio waves, and an audio device 400 connected to the antenna and capable of viewing ATV and listening to radio broadcasts are mounted. The conversion system 10 also includes a DTTV antenna 200 for receiving UHF band radio waves, and a DTTV receiver 100 connected to the DTTV antenna 200 via a coaxial cable 300.
　尚、ＤＴＴＶ用アンテナ２００と、アナログ放送用アンテナ５００とは、フィルムアンテナとして構成されており、これらのアンテナは互いに近接した状態で配置されている。具体的には、これらのアンテナは、例えば、車両のウインドウに隣り合わせの状態で貼り付けられていても良いし、重ね合わせられた状態で貼り付けられていても良い。 Note that the DTTV antenna 200 and the analog broadcast antenna 500 are configured as film antennas, and these antennas are arranged close to each other. Specifically, for example, these antennas may be attached to a vehicle window in a state of being adjacent to each other, or may be attached in an overlapped state.
　（２）ＤＴＴＶ受信装置の構成について
　図１Ｂに示すように、ＤＴＴＶ受信装置１００は、同軸ケーブル３００が接続され、ＤＴＴＶ用アンテナ２００から受信信号が入力されるコネクタ１１０と、ＶＨＦ帯の上限周波数を低域側のカットオフ周波数とすると共に、ＵＨＦ帯の下限周波数を高域側のカットオフ周波数とするダイプレクサ１２０と、ダイプレクサ１２０を通過した高域側の受信信号（ＤＴＴＶ信号）を復調し、図示しないリモートコントローラ等を介してユーザに指定されたチャンネルに対応する映像信号と音声信号とを抽出するＤＴＴＶチューナ部１３０と、ＤＴＴＶチューナ部１３０からの映像信号等により、ＡＴＶにおけるＶＨＦ帯のチャンネルに対応する搬送波を変調し、ＡＴＶ信号を生成する変調回路１４０とを有している。尚、変調回路１４０にて生成されたＡＴＶ信号は、ダイプレクサ１２０を経由してコネクタ１１０から出力される。 (2) Configuration of DTTV Receiver As shown in FIG. 1B, the DTTV receiver 100 includes a connector 110 to which a coaxial cable 300 is connected and a reception signal is input from the DTTV antenna 200, and an upper limit frequency of the VHF band. A diplexer 120 having a lower frequency cut-off frequency and a lower limit frequency of the UHF band as a high-frequency cut-off frequency, and a high-frequency received signal (DTTV signal) passing through the diplexer 120 are demodulated. DTTV tuner unit 130 that extracts a video signal and an audio signal corresponding to a channel designated by a user via a remote controller or the like, and a video signal from the DTTV tuner unit 130 corresponds to a VHF band channel in ATV. Modulation circuit 140 that modulates a carrier wave to generate an ATV signal is doing. The ATV signal generated by the modulation circuit 140 is output from the connector 110 via the diplexer 120.
　（３）ＤＴＴＶ用アンテナの構成について
　図２Ａに示すように、ＤＴＴＶ用アンテナ２００は、車両のウインドウに貼り付けられた透明フィルム２１０と、透明フィルム２１０に覆われているアンテナ素子２２１及び２２２と、アンテナ素子２２１及び２２２の給電点となる給電部２３０を有している。尚、ＤＴＴＶ用アンテナ２００と同軸ケーブル３００とは、ＵＨＦ帯の電波の受信に適するようにインピーダンス整合がされている。 (3) Configuration of DTTV Antenna As shown in FIG. 2A, a DTTV antenna 200 includes a transparent film 210 attached to a vehicle window, antenna elements 221 and 222 covered with the transparent film 210, A power feeding unit 230 serving as a power feeding point for the antenna elements 221 and 222 is provided. The DTTV antenna 200 and the coaxial cable 300 are impedance matched so as to be suitable for reception of radio waves in the UHF band.
　また、図２Ｂに示すように、給電部２３０は、同軸ケーブル３００の芯線３１０とアンテナ素子２２１とを接続する芯線側給電端子２３１と、同軸ケーブル３００の外部導体３２０とアンテナ素子２２２とを接続する外部導体側給電端子２３２とを有している。 Further, as shown in FIG. 2B, the power feeding unit 230 connects the core wire side power supply terminal 231 that connects the core wire 310 of the coaxial cable 300 and the antenna element 221, and the outer conductor 320 of the coaxial cable 300 and the antenna element 222. And an external conductor side power supply terminal 232.
　また、図３Ａに示すように、芯線側給電端子２３１は、アンテナ素子２２１からの受信信号（ＤＴＴＶ信号）を増幅してＤＴＴＶ受信装置１００に対して出力すると共に、ＤＴＴＶ受信装置１００からの送信信号（ＡＴＶ信号）を増幅してアンテナ素子２２１に対して出力する。 Also, as shown in FIG. 3A, the core wire side power supply terminal 231 amplifies the reception signal (DTTV signal) from the antenna element 221 and outputs the amplified signal to the DTTV reception device 100, and also transmits the transmission signal from the DTTV reception device 100. (ATV signal) is amplified and output to the antenna element 221.
　芯線側給電端子２３１は、アンテナ素子２２１との接点２３１ａと、接点２３１ａからの受信信号と、増幅回路２３１ｅにて増幅された送信信号とが入力され、ＶＨＦ帯の上限周波数を低域側のカットオフ周波数とすると共に、ＵＨＦ帯の下限周波数を高域側のカットオフ周波数とするダイプレクサ２３１ｂと、ダイプレクサ２３１ｂを通過した高域側の受信信号を増幅する増幅回路２３１ｃとを有している。 The core wire side power supply terminal 231 receives the contact 231a with the antenna element 221, the reception signal from the contact 231a, and the transmission signal amplified by the amplifier circuit 231e, and cuts the upper limit frequency of the VHF band to the lower band side. A diplexer 231b having a lower frequency in the UHF band as a high-frequency cutoff frequency and an amplifying circuit 231c for amplifying a high-frequency received signal that has passed through the diplexer 231b are provided.
　また、芯線側給電端子２３１は、同軸ケーブル３００の芯線３１０との接点２３１ｇと、接点２３１ｇから入力される送信信号から、ＵＨＦ帯よりも高周波の信号をカットするＬＰＦ（Low Pass Filter）２３１ｆと、増幅回路２３１ｃからの受信信号と、ＬＰＦ２３１ｆからの送信信号とが入力され、ＶＨＦ帯の上限周波数を低域側のカットオフ周波数とすると共に、ＵＨＦ帯の下限周波数を高域側のカットオフ周波数とするダイプレクサ２３１ｄと、ダイプレクサ２３１ｄを通過した低域側の送信信号を増幅する増幅回路２３１ｅとを有している。 The core wire side power supply terminal 231 includes a contact 231g with the core wire 310 of the coaxial cable 300, an LPF (Low Pass Filter) 231f that cuts a signal having a frequency higher than the UHF band from a transmission signal input from the contact 231g, The reception signal from the amplifier circuit 231c and the transmission signal from the LPF 231f are input, and the upper limit frequency of the VHF band is set to the cut-off frequency on the low frequency side, and the lower limit frequency of the UHF band is set to the cut-off frequency on the high frequency side. A diplexer 231d, and an amplifying circuit 231e that amplifies the low-frequency transmission signal that has passed through the diplexer 231d.
　［動作］
　次に、本実施形態の変換システム１０の動作について説明する。変換システム１０では、ＤＴＴＶ用アンテナ２００にてＵＨＦ帯の電波（ＤＴＴＶ信号）が受信される。このＤＴＴＶ信号は、芯線側給電端子２３１において、接点２３１ａ，ダイプレクサ２３１ｂを通過して増幅回路２３１ｃに入力される。そして、この増幅回路２３１ｃにて増幅された後に、ダイプレクサ２３１ｄ，ＬＰＦ２３１ｆ，接点２３１ｇを経由してＤＴＴＶ受信装置１００に出力される。 [Operation]
Next, operation | movement of the conversion system 10 of this embodiment is demonstrated. In the conversion system 10, an HF radio wave (DTTV signal) is received by the DTTV antenna 200. This DTTV signal passes through the contact 231a and the diplexer 231b at the core wire side power supply terminal 231 and is input to the amplifier circuit 231c. Then, after being amplified by the amplifier circuit 231c, it is output to the DTTV receiver 100 via the diplexer 231d, the LPF 231f, and the contact 231g.
　また、ＤＴＴＶ受信装置１００では、ＤＴＴＶ用アンテナ２００から受信したＤＴＴＶ信号から、ユーザに指定されたチャンネルに対応する映像信号と音声信号とが抽出され、これらの信号は、例えば１チャンネルに対応するＡＴＶ信号に変換され、コネクタ１１０から出力される。尚、ＤＴＴＶ受信装置１００から送信されるＡＴＶ信号はＶＨＦ帯であれば良く、ＶＨＦテレビチャンネル（日本では１～１２チャンネル）のうちのいずれかに対応していても良い。 Further, in the DTTV receiving apparatus 100, a video signal and an audio signal corresponding to a channel designated by the user are extracted from the DTTV signal received from the DTTV antenna 200, and these signals are, for example, ATV corresponding to one channel. It is converted into a signal and output from the connector 110. Note that the ATV signal transmitted from the DTTV receiving apparatus 100 may be in the VHF band, and may correspond to any one of the VHF television channels (channels 1 to 12 in Japan).
　また、ＤＴＴＶ受信装置１００から出力されたＶＨＦ帯のＡＴＶ信号は、芯線側給電端子２３１において、接点２３１ｇ，ＬＰＦ２３１ｆ，ダイプレクサ２３１ｄを通過して増幅回路２３１ｅに入力される。そして、この増幅回路２３１ｅにて増幅された後に、ダイプレクサ２３１ｂ，接点２３１ａを経てアンテナ素子２２１に出力される。 The VHF band ATV signal output from the DTTV receiver 100 is input to the amplifier circuit 231e through the contacts 231g, the LPF 231f, and the diplexer 231d at the core-side power supply terminal 231. Then, after being amplified by the amplifier circuit 231e, it is output to the antenna element 221 through the diplexer 231b and the contact 231a.
　そして、アンテナ素子２２１から、ＤＴＴＶ受信装置１００にて生成された、ＤＴＴＶを視聴するためのＶＨＦ帯のＡＴＶ信号が送信され、アナログ放送用アンテナ５００を介してオーディオ装置４００にて受信される。 The VHF band ATV signal for viewing DTTV generated by the DTTV receiving apparatus 100 is transmitted from the antenna element 221 and received by the audio apparatus 400 via the analog broadcasting antenna 500.
　［効果］
　本実施形態における変換システム１０を構成するＤＴＴＶ用アンテナ２００を、アナログ放送用アンテナ５００の付近に設置することにより、アナログ放送用アンテナ５００に接続されているオーディオ装置４００にてＤＴＴＶを視聴することが可能となる。また、この変換システム１０では、デジタル放送の電波の受信と、変換されたＡＴＶ信号の送信とが同じアンテナを用いて行なわれている。このため、部品点数の増加を抑えつつ、デジタルテレビ放送の番組の映像信号等をＡＴＶの信号に変換してオーディオ装置４００に送信することができる。 [effect]
By installing the DTTV antenna 200 constituting the conversion system 10 in the present embodiment in the vicinity of the analog broadcast antenna 500, the audio device 400 connected to the analog broadcast antenna 500 can view the DTTV. It becomes possible. Further, in this conversion system 10, reception of digital broadcast radio waves and transmission of converted ATV signals are performed using the same antenna. For this reason, it is possible to convert a video signal or the like of a digital television broadcast program into an ATV signal and transmit it to the audio apparatus 400 while suppressing an increase in the number of parts.
　尚、変換システム１０では、ＤＴＴＶ用アンテナ２００は、ＤＴＴＶの電波の受信に適するようにインピーダンス整合がされており、ＡＴＶの電波を放射する際には損失が生じてしまう。しかしながら、このＤＴＴＶ用アンテナ２００がアナログ放送用アンテナ５００の付近に配置されることにより、オーディオ装置４００に対して十分な強度のＡＴＶ信号の送信が可能となる。また、ＤＴＴＶ用アンテナ２００を介してＡＴＶの電波を放射する際には、同軸ケーブル３００との接点付近で反射が生じるが、この反射により、ＡＴＶに適したインピーダンス整合がされているアンテナを用いる場合に比べ、ＤＴＴＶ用アンテナ２００の付近に存在する導体に対し、より強力な電磁誘導を発生させることができると考えられる。これにより、ＤＴＴＶ用アンテナ２００をアナログ放送用アンテナ５００の付近に配置した場合には、この電磁誘導により、ＡＴＶ信号の伝達が助長されると考えられる。 In the conversion system 10, the DTTV antenna 200 is impedance-matched so as to be suitable for receiving DTTV radio waves, and loss occurs when radiating ATV radio waves. However, by arranging the DTTV antenna 200 in the vicinity of the analog broadcast antenna 500, it is possible to transmit an ATV signal having a sufficient strength to the audio apparatus 400. In addition, when ATV radio waves are radiated through the DTTV antenna 200, reflection occurs near the contact point with the coaxial cable 300. By using this reflection, an antenna having impedance matching suitable for ATV is used. As compared with the above, it is considered that stronger electromagnetic induction can be generated for the conductor existing in the vicinity of the DTTV antenna 200. Thus, when the DTTV antenna 200 is disposed in the vicinity of the analog broadcast antenna 500, it is considered that the transmission of the ATV signal is facilitated by this electromagnetic induction.
　また、テレビ放送の受信用アンテナには、受信感度を向上させるために指向性が設けられている場合がある。このようなアンテナが用いられる場合には、テレビ放送電波の受信状態と、ＤＴＴＶ用アンテナ２００からアナログ放送用アンテナ５００への送信状態との両方が良好となるよう、各アンテナの指向性を考慮してこれらのアンテナの向きや位置関係を定める必要がある。つまり、指向性を有するアンテナが、ＤＴＴＶ用アンテナ２００やアナログ放送用アンテナ５００として用いられている場合には、これらのアンテナの配置態様が制限されてしまうのである。これに対し、変換システム１０によれば、単に、アナログ放送用アンテナ５００に近接した状態でＤＴＴＶ用アンテナ２００を配置することにより、変換システム１０からオーディオ装置４００に対しての送信状態を良好なものにすることができ、アンテナの配置に関しての自由度を増加させることができるのである。 Also, there is a case where the directivity is provided in the receiving antenna for television broadcasting in order to improve the receiving sensitivity. When such an antenna is used, the directivity of each antenna is taken into consideration so that both the reception state of the television broadcast radio wave and the transmission state from the DTTV antenna 200 to the analog broadcast antenna 500 are good. It is necessary to determine the orientation and positional relationship of these antennas. That is, when a directional antenna is used as the DTTV antenna 200 or the analog broadcast antenna 500, the arrangement of these antennas is limited. On the other hand, according to the conversion system 10, the transmission state from the conversion system 10 to the audio device 400 is improved by simply disposing the DTTV antenna 200 in the vicinity of the analog broadcasting antenna 500. It is possible to increase the degree of freedom regarding the antenna arrangement.
　また、ＤＴＴＶ用アンテナ２００における給電部２３０の芯線側給電端子２３１では、アンテナ素子からの受信信号のうち、ＤＴＴＶに対応する周波数帯域であるＵＨＦ帯の信号が増幅される。このため、ＤＴＴＶ受信装置１００におけるＤＴＴＶの受信状態を良好なものとすることができる。 Also, at the core wire side feed terminal 231 of the feed unit 230 in the DTTV antenna 200, a signal in the UHF band, which is a frequency band corresponding to DTTV, is amplified among the received signals from the antenna element. For this reason, the DTTV receiving state in the DTTV receiving apparatus 100 can be improved.
　また、給電部２３０の芯線側給電端子２３１では、ＤＴＴＶ受信装置１００からの送信信号のうち、ＶＨＦ帯の信号が増幅される。こうすることにより、ＤＴＴＶ受信装置１００にてＡＴＶ信号を増幅して送信する場合に比べ、ＡＴＶ信号が同軸ケーブル３００を伝達する際に生じる電磁誘導を抑制することができる。したがって、同軸ケーブル３００の付近に配置されている装置におけるノイズの発生を抑えることが可能となる。 Also, at the core wire side power supply terminal 231 of the power supply unit 230, a signal in the VHF band among the transmission signals from the DTTV receiver 100 is amplified. By doing so, it is possible to suppress electromagnetic induction that occurs when the ATV signal is transmitted through the coaxial cable 300 as compared to the case where the ATV signal is amplified and transmitted by the DTTV receiver 100. Therefore, it is possible to suppress the generation of noise in the device arranged in the vicinity of the coaxial cable 300.
　［他の実施形態］
　（１）本実施形態では、ＤＴＴＶ用アンテナ２００における芯線側給電端子２３１のダイプレクサ２３１ｄを通過したＶＨＦ帯の送信信号は、増幅回路２３１ｅにて増幅された後にアンテナ素子２２１から送信される。しかし、図３Ｂに示すように、ダイプレクサ２３１ｄを通過したＶＨＦ帯の送信信号は、直接、ダイプレクサ２３１ｂに入力されても良い。このような構成を有する場合であっても、ＤＴＴＶ受信装置１００からオーディオ装置４００に対して、ＤＴＴＶを視聴するためのＡＴＶ信号を送信することができる。 [Other Embodiments]
(1) In this embodiment, the VHF band transmission signal that has passed through the diplexer 231d of the core wire side feed terminal 231 in the DTTV antenna 200 is amplified by the amplifier circuit 231e and then transmitted from the antenna element 221. However, as illustrated in FIG. 3B, the VHF band transmission signal that has passed through the diplexer 231d may be directly input to the diplexer 231b. Even in such a case, an ATV signal for viewing DTTV can be transmitted from the DTTV receiving apparatus 100 to the audio apparatus 400.
　（２）また、本実施形態では、ＤＴＴＶ用アンテナ２００やアナログ放送用アンテナ５００は、フィルムアンテナとして構成されている。しかし、これらのアンテナは、フィルムアンテナ以外の態様のアンテナであっても良い。このような構成を有する場合であっても、同様の効果を得ることができる。 (2) In this embodiment, the DTTV antenna 200 and the analog broadcast antenna 500 are configured as film antennas. However, these antennas may be antennas other than the film antenna. Even if it has such a structure, the same effect can be acquired.
　（３）また、ＤＴＴＶ受信装置１００は、ＵＨＦ帯の電波を介して、図示しないリモートコントローラからの信号を受信しても良い。尚、ＵＨＦ帯の電波とは、例えば、ＤＴＴＶで使用されている帯域と重複しない４６９ＭＨｚの電波であっても良い。 (3) Moreover, the DTTV receiving apparatus 100 may receive a signal from a remote controller (not shown) via a UHF band radio wave. The UHF band radio wave may be, for example, a 469 MHz radio wave that does not overlap with the band used in DTTV.
　具体的に説明すると、本実施形態のＤＴＴＶ受信装置１００は、図４に示すように、さらに、ダイプレクサ１２０を通過した高域側の受信信号が入力される分岐回路１５０と、分岐回路１５０にて分岐された一方の受信信号のうち、リモートコントローラに対応する周波数の受信信号を抽出するリモートコントロール受信部１６０と、リモートコントロール受信部１６０にて抽出されたリモートコントローラからの受信信号に応じて、ＤＴＴＶチューナ部１３０や変調回路１４０に対して指示を行う制御部１７０とを有している。 Specifically, as shown in FIG. 4, the DTTV receiver 100 according to the present embodiment further includes a branch circuit 150 to which a high-frequency received signal that has passed through the diplexer 120 is input, and a branch circuit 150. A remote control receiving unit 160 that extracts a received signal having a frequency corresponding to the remote controller from the one of the branched received signals, and a DTTV according to the received signal from the remote controller extracted by the remote control receiving unit 160 And a control unit 170 that gives instructions to the tuner unit 130 and the modulation circuit 140.
　尚、分岐回路１５０にて分岐された他方の受信信号は、ＤＴＴＶチューナ部１３０に入力され、この受信信号に基づきＤＴＴＶを視聴するためのＡＴＶ信号が生成され、出力される。 The other received signal branched by the branch circuit 150 is input to the DTTV tuner unit 130, and an ATV signal for viewing DTTV is generated and output based on this received signal.
　一般的に、赤外線を介してリモートコントローラから信号が送信されるが、このような場合には、ボンネット上等、ユーザから見える場所に受光部を配置する必要がある。これに対し、電波を介してリモートコントローラからの信号を受信する場合には、受光部が不要となる。 Generally, a signal is transmitted from a remote controller via infrared rays. In such a case, it is necessary to arrange a light receiving unit on a bonnet or the like that is visible to the user. On the other hand, when receiving a signal from the remote controller via radio waves, the light receiving unit is not necessary.
　また、ＵＨＦ帯以外の電波を利用する場合には、リモートコントローラからの信号の受信のため、別途アンテナを設ける必要が生じる。ここで、ＤＴＴＶ受信装置１００は、例えば、車両のシートの下等に配置されることが想定されるが、例えば、ＤＴＴＶ受信装置１００の筐体の内部等にアンテナを設けた場合には、受信が困難となってしまう。しかし、ＵＨＦ帯の電波を利用することにより、例えば、車両のウインドウに貼り付けた状態で配置されているＤＴＴＶ用アンテナ２００を用いて、リモートコントローラからの信号を効率良く受信することが可能となる。 Also, when using radio waves other than the UHF band, it is necessary to provide a separate antenna for receiving signals from the remote controller. Here, the DTTV receiving apparatus 100 is assumed to be disposed, for example, under the seat of the vehicle. For example, when an antenna is provided inside the housing of the DTTV receiving apparatus 100, reception is performed. Becomes difficult. However, by using the UHF band radio wave, for example, it is possible to efficiently receive a signal from the remote controller using the DTTV antenna 200 arranged in a state of being attached to a vehicle window. .
　［特許請求の範囲との対応］
　上記実施形態の説明で用いた用語と、特許請求の範囲の記載に用いた用語との対応を示す。 [Correspondence with Claims]
The correspondence between the terms used in the description of the above embodiment and the terms used in the description of the claims is shown.
　ＤＴＴＶ受信装置１００は、本発明の変換装置の一例であり、ＤＴＴＶ用アンテナ２００は、本発明のアンテナ部の一例であり、オーディオ装置４００は、本発明の受信装置の一例である。 The DTTV receiving device 100 is an example of the conversion device of the present invention, the DTTV antenna 200 is an example of the antenna unit of the present invention, and the audio device 400 is an example of the receiving device of the present invention.
　また、ＤＴＴＶチューナ部１３０は、本発明の抽出手段の一例であり、変調回路１４０は、本発明の変換手段の一例であり、増幅回路２３１ｃは、本発明の第一の増幅手段の一例であり、増幅回路２３１ｅは、本発明の第二の増幅手段の一例である。 The DTTV tuner unit 130 is an example of the extraction unit of the present invention, the modulation circuit 140 is an example of the conversion unit of the present invention, and the amplifier circuit 231c is an example of the first amplification unit of the present invention. The amplifying circuit 231e is an example of a second amplifying unit of the present invention.

Claims (5)

  1. 　変換システムであって、
    　デジタルテレビ放送における電波の受信に適するようにインピーダンス整合されたアンテナ部と、
    　該アンテナ部から伝送線路を介してデジタルテレビ放送信号を受信する変換装置と
    　を備え、
    　前記変換装置は、
    　前記アンテナ部から受信したデジタルテレビ放送信号から、ユーザにより指定されたデジタルテレビ放送のチャンネルに対応する映像信号と音声信号とを抽出する抽出手段と、
    　前記抽出手段により抽出された前記映像信号と前記音声信号とを、いずれかのチャンネルに対応する周波数のアナログテレビ放送信号に変換し、該アナログテレビ放送信号を、前記アンテナ部を介して、アナログテレビ放送を視聴するための受信装置に対して送信する変換手段と、
    　を備えること、
    　を特徴とする変換システム。     A conversion system,
    An antenna unit impedance-matched to be suitable for receiving radio waves in digital television broadcasting;
    A converter for receiving a digital television broadcast signal from the antenna section via a transmission line,
    The converter is
    Extraction means for extracting a video signal and an audio signal corresponding to a digital television broadcast channel designated by a user from the digital television broadcast signal received from the antenna unit;
    The video signal and the audio signal extracted by the extraction unit are converted into an analog television broadcast signal having a frequency corresponding to any channel, and the analog television broadcast signal is converted into an analog television via the antenna unit. Conversion means for transmitting to a receiving device for viewing the broadcast;
    Providing
    A conversion system characterized by
  2. 　請求項１に記載の変換システムであって、
    　前記アンテナ部は、
    　デジタルテレビ放送における電波を受信するためのアンテナ素子と、
    　前記アンテナ素子にて受信された電波に基づく受信信号のうち、デジタルテレビ放送信号のみを増幅させ、前記変換装置に送信する第一の増幅手段と、
    　を備えること、
    　を特徴とする変換システム。     The conversion system according to claim 1,
    The antenna unit is
    An antenna element for receiving radio waves in digital television broadcasting;
    Of the received signal based on the radio wave received by the antenna element, the first amplifying means for amplifying only the digital television broadcast signal and transmitting to the conversion device;
    Providing
    A conversion system characterized by
  3. 　請求項２に記載の変換システムであって、
    　前記アンテナ部は、前記変換装置からの送信信号のうち、アナログテレビ放送信号のみを増幅させる第二の増幅手段をさらに備えること、
    　を特徴とする変換システム。     The conversion system according to claim 2,
    The antenna unit further includes second amplification means for amplifying only an analog television broadcast signal among transmission signals from the conversion device;
    A conversion system characterized by
  4. 　請求項１から請求項３に記載の変換システムであって、
    　前記アンテナ部は、フィルムアンテナとして構成されていること、
    　を特徴とする変換システム。     The conversion system according to claim 1, wherein:
    The antenna unit is configured as a film antenna;
    A conversion system characterized by
  5. 　変換装置であって、
    　デジタルテレビ放送における電波の受信に適するようにインピーダンス整合されたアンテナ部から伝送線路を介して受信したデジタルテレビ放送信号から、ユーザにより指定されたデジタルテレビ放送のチャンネルに対応する映像信号と音声信号とを抽出する抽出手段と、
    　前記抽出手段により抽出された前記映像信号と前記音声信号とを、いずれかのチャンネルに対応する周波数のアナログテレビ放送信号に変換し、該アナログテレビ放送信号を、前記アンテナ部を介して、アナログテレビ放送を視聴するための受信装置に対して送信する変換手段と、
    　を備えること、
    　を特徴とする変換装置。     A conversion device,
    A video signal and an audio signal corresponding to a digital television broadcast channel designated by the user from a digital television broadcast signal received via a transmission line from an antenna unit impedance-matched so as to be suitable for radio wave reception in digital television broadcast Extracting means for extracting
    The video signal and the audio signal extracted by the extraction unit are converted into an analog television broadcast signal having a frequency corresponding to any channel, and the analog television broadcast signal is converted into an analog television via the antenna unit. Conversion means for transmitting to a receiving device for viewing the broadcast;
    Providing
    A conversion device characterized by.
PCT/JP2010/055941 2009-03-31 2010-03-31 Conversion system, conversion device WO2010114064A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009087183A JP5368145B2 (en) 2009-03-31 2009-03-31 Conversion system, conversion device
JP2009-087183 2009-03-31

Publications (1)

Publication Number Publication Date
WO2010114064A1 true WO2010114064A1 (en) 2010-10-07

Family

ID=42828353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/055941 WO2010114064A1 (en) 2009-03-31 2010-03-31 Conversion system, conversion device

Country Status (3)

Country Link
JP (1) JP5368145B2 (en)
TW (1) TW201110692A (en)
WO (1) WO2010114064A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5586240A (en) * 1978-12-25 1980-06-28 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna feeding unit
JPS63109616A (en) * 1986-10-28 1988-05-14 Kokusai Denshin Denwa Co Ltd <Kdd> Phased array antenna
JP2003219312A (en) * 2002-01-28 2003-07-31 Nippon Hoso Kyokai <Nhk> Set-top box
JP2003304461A (en) * 2002-04-10 2003-10-24 Nippon Hoso Kyokai <Nhk> Remodulator, and digital tuner or digital receiver incorporating it
JP2008187383A (en) * 2007-01-29 2008-08-14 Maspro Denkoh Corp Film antenna, power supply device, and receiving system for traveling object

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003218811A (en) * 2002-01-23 2003-07-31 Japan Radio Co Ltd Radio communication apparatus having self-diagnostic function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5586240A (en) * 1978-12-25 1980-06-28 Kokusai Denshin Denwa Co Ltd <Kdd> Antenna feeding unit
JPS63109616A (en) * 1986-10-28 1988-05-14 Kokusai Denshin Denwa Co Ltd <Kdd> Phased array antenna
JP2003219312A (en) * 2002-01-28 2003-07-31 Nippon Hoso Kyokai <Nhk> Set-top box
JP2003304461A (en) * 2002-04-10 2003-10-24 Nippon Hoso Kyokai <Nhk> Remodulator, and digital tuner or digital receiver incorporating it
JP2008187383A (en) * 2007-01-29 2008-08-14 Maspro Denkoh Corp Film antenna, power supply device, and receiving system for traveling object

Also Published As

Publication number Publication date
JP2010239536A (en) 2010-10-21
TW201110692A (en) 2011-03-16
JP5368145B2 (en) 2013-12-18

Similar Documents

Publication Publication Date Title
US20080146147A1 (en) Methods and systems for retransmission of a broadcast signal using proximity transmitting radiator
JP2010239535A (en) Transfer device
TWI514671B (en) Earphone antenna, earphone devcie and broadcasting receiving device using the same
JP5117098B2 (en) A wireless communication device capable of receiving mobile broadcasts and transmitting and receiving Bluetooth with a single antenna
GB2490145A (en) A DAB (RTM) receiver module, including tuneable impedance matching circuitry, for retrofitting DAB radio to a car
WO2011076791A1 (en) Installation for emission/reception of satellite signals
JP3865715B2 (en) Digital terrestrial television broadcasting transmission apparatus and receiving apparatus
EP2560236B1 (en) Apparatus to communicate multiple signals from multiple antennas on a single cable.
CN201328153Y (en) Multi-functional KU frequency-band satellite receiving high-frequency head and corresponding receiving device
JP5368145B2 (en) Conversion system, conversion device
JP2005244694A (en) Combined antenna device and mobile having the same
JP2005539426A (en) Transmitting equipment to be combined with receiving equipment
CN102544696B (en) Earphone antenna and apply Headphone device and the broadcast receiver of this earphone antenna
JPH1028246A (en) Television receiver
KR100592403B1 (en) Satellite antenna using reflector plate of mobile station
KR100959773B1 (en) System, Dual Low Noise Block Apparatus and Set-Top-Repeater for Converging Satellite Broadcast Services And Mobile Services
JP3999691B2 (en) Satellite signal receiving transmission system and satellite signal retransmitting apparatus
KR101221398B1 (en) Modem for Radio Frequency including Tuner and display apparatus including thereof
JP5706302B2 (en) Receiver
KR200427024Y1 (en) A omni-directional antenna for digital multimedia broadcasting having in the car
JP5653384B2 (en) Retransmission device
JP2006254205A (en) Television receiving amplifying device, receiving terminal device, and television receiving system
JP2010239538A (en) Converter
CN101110915A (en) Antenna apparatus and system of digital television
JP2009152955A (en) Broadcast signal coupling apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10758835

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10758835

Country of ref document: EP

Kind code of ref document: A1