WO2003039136A1 - Re-trasmitter and digital broadcast receiving system - Google Patents
Re-trasmitter and digital broadcast receiving system Download PDFInfo
- Publication number
- WO2003039136A1 WO2003039136A1 PCT/JP2002/011247 JP0211247W WO03039136A1 WO 2003039136 A1 WO2003039136 A1 WO 2003039136A1 JP 0211247 W JP0211247 W JP 0211247W WO 03039136 A1 WO03039136 A1 WO 03039136A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- digital broadcast
- signal
- frequency
- retransmitting
- antenna
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—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 or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43637—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
-
- 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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4383—Accessing a communication channel
-
- 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
Definitions
- the present invention relates to a retransmitting device for receiving a digital broadcast and retransmitting it to a digital broadcast receiving device, and a digital broadcast receiving system.
- a broadcast receiving apparatus for receiving such digital broadcasts selects one of a plurality of channels of digital broadcast received through an antenna by a tuner, and selects one of a plurality of programs included in the one channel. One is selected by demultiplex processing, and the video / audio signal is output by decoding the digital signal of the selected channel.
- the present invention has been made in view of the above circumstances, and has as its object to provide a retransmitting apparatus and a digital broadcast receiving system capable of performing retransmission suitably without changing the frequency. Disclosure of the invention
- a retransmission apparatus comprising: a high frequency input unit to which a receiving antenna for receiving a digital broadcast wave is connected; and a high frequency output unit to which a retransmission antenna for retransmitting the digital broadcast wave is connected.
- Means for acquiring a frequency selection signal which is a signal transmitted from the digital broadcast receiving apparatus side and which channel is selected by the digital broadcast transmitting / receiving apparatus, and input from the high frequency input section
- selecting and transmitting means for selecting a high-frequency signal of a frequency corresponding to the frequency selection signal from the high-frequency signals and supplying the selected high-frequency signal to the high-frequency output unit.
- the selected channel is recognized on the retransmitting apparatus side, and the high-frequency signal (digital broadcast wave) input from the high-frequency input unit is used as described above.
- a high-frequency signal having a frequency corresponding to the selected channel is selected, supplied to the high-frequency output unit, and provided to the digital broadcast receiving device by a retransmission antenna.
- An indoor receiving antenna is mounted on the high-frequency input unit as a receiving antenna, a retransmission antenna is mounted on the high-frequency output unit, and the indoor receiving antenna and the retransmitting antenna have orthogonal polarization directions. Is good.
- An indoor receiving antenna is mounted on the high-frequency input unit as a receiving antenna.
- a retransmission antenna is mounted on the high-frequency output unit. The transmitting directions of the indoor receiving antenna and the retransmitting antenna are opposite to each other. It is preferable to adopt a configuration in which the conductors are arranged so as to sandwich them.
- a first gain control unit for making a level of a high-frequency signal input from a high-frequency input unit constant; a transmission frequency variable filter for selecting a high-frequency signal having a frequency corresponding to a frequency selection signal; And second gain control means for controlling the transmission power of the selected high frequency signal.
- the retransmitting device includes a unit for acquiring an ONZOFF control signal sent from the digital broadcast receiving device side and a power switch, and is turned on / off by control from the digital broadcast receiving device side. It is good to be constituted.
- a digital broadcast receiving system includes any one of the above-described retransmitting devices, and a digital broadcast receiving device having means for transmitting a signal to the retransmitting device.
- the digital broadcast receiving device is a process for acquiring the received signal quality of the digital broadcast wave from the retransmitting device.
- a selection control means for performing a process of acquiring the received signal quality of the digital broadcast wave from the transmitting station and a process of comparing the two received signal qualities to determine which digital broadcast wave to use. Good.
- a digital broadcast receiving system includes a retransmitting device in which the polarization directions of an indoor receiving antenna and a retransmitting antenna are orthogonal to each other, and a means for transmitting a signal to the retransmitting device.
- a digital broadcast receiving system comprising: a first receiving element for receiving a horizontally polarized digital broadcast wave; and a first receiving element for receiving a vertically polarized digital broadcast wave.
- the determination result of each channel by the selection control means is stored in a memory, and when a channel for which the determination result has already been stored is selected, it is determined based on the stored determination result, and the determination processing by the selection control means is performed. May be omitted.
- FIG. 1 is a block diagram showing a digital broadcast receiving apparatus in detail in a digital broadcast receiving system according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing a retransmitting apparatus in digital broadcast receiving system according to an embodiment of the present invention.
- FIG. 3 shows an antenna attached to a retransmitting device used in the digital broadcast receiving system according to the embodiment of the present invention. It is a perspective view. BEST MODE FOR CARRYING OUT THE INVENTION
- the indoor antenna 15 has a first receiving element 15a for receiving a horizontally polarized digital broadcast wave and a second receiving element 15b for receiving a vertically polarized digital broadcast wave.
- the terrestrial digital tuner 21 determines which element the received signal is to be adopted based on a command from the microcomputer 31.
- the terrestrial digital tuner 21 extracts a signal of a specific frequency from the received high-frequency digital modulation signal (digital broadcast wave). In addition, the terrestrial digital tuner 21 demodulates the selected digital modulation signal and outputs a transport stream by providing a demodulation circuit, a deinterleaving circuit, and an error correction circuit. Further, the terrestrial digital tuner 21 generates a CZN or an error rate (received signal quality value) of the received digital broadcast wave and supplies the generated signal to the microcomputer 31.
- the demultiplexer (D EMU X) 22 converts the transport stream received from the terrestrial digital tuner 21 into an MPEG2 (Moving Picture Experts Group 2) stream, an audio stream.
- MPEG2 Motion Picture Experts Group 2
- PSI ZS I Program S pecific Information / Service Information
- the demultiplexer 22 supplies a video stream and an audio stream to the AV decoder 23, and supplies PSI / SI to the microcomputer 31.
- a plurality of channels are multiplexed in the transport and the stream, and the process of selecting an arbitrary channel from these is entrusted to the PSI ZSI. This is possible by extracting the data that indicates which bucket I the desired channel is multiplexed in the transport stream.
- the transport stream can also be selected based on PSI / SI information.
- the AV decoder 23 includes a video decoder for decoding a video stream, and an audio decoder for decoding an audio stream.
- the video decoder decodes the input variable-length code to obtain quantization coefficients and motion vectors, and performs inverse DCT transform and motion compensation control based on the motion vectors.
- the audio decoder decodes the input coded signal to generate audio data.
- the video data generated by the decoding is output to the video processing circuit 24, and the audio data is output to the audio processing circuit 25.
- the video processing circuit 24 receives the video data from the AV decoder 23, performs DZA conversion, and generates a video signal.
- the audio signal processing circuit 25 receives the audio data output from the AV decoder 4, performs D / A conversion, and generates a right (R) sound analog signal and a left (L) sound analog signal.
- the drive circuit 26 receives the video signal, generates an RGB signal and a synchronization signal, and drives the CRT 27.
- the speaker 33 receives the analog audio signal and outputs the audio.
- the OSD (on-screen display) circuit 30 outputs to the adder 34 bit map data based on the character information and graphic information specified by the micro computer 31.
- the adder 34 incorporates the bitmap data into an image.
- the remote control transmitter 28 is a transmitter for transmitting a command to the broadcast receiving device 17.
- the remote control transmitter 28 is provided with a power key, a channel designation key, and the like. Keys provided on this remote control transmitter 28 When is operated, a signal light (remote control signal) indicating a command corresponding to those keys is transmitted from a light emitting unit (not shown).
- the remote control receiver 29 receives the signal light, converts the signal light into an electric signal, and supplies the electric signal to the microcomputer 31.
- the memory (for example, EEPROM, etc.) 32 stores various programs for executing a predetermined operation. Also, information on the polarization direction of the digital broadcast wave directly from the broadcasting station (that is, which of the first receiving element 15a and the second receiving element 15b receives the direct digital broadcasting wave from the broadcasting station) Is stored. This information can be input by the user using the remote controller transmitter 28 or a setting switch (not shown). In the memory 32, the C / N or error rate (received signal quality value) acquired by the tuner 21 is stored corresponding to the channel.
- the C / N or error rate (received signal quality value) acquired by the tuner 21 is stored corresponding to the channel.
- the control signal transmitting section 16 transmits various control signals (for example, infrared signals) to the retransmitting device 14 based on a command from the microcomputer 31.
- the microcomputer 31 performs a program selection process by a user using the remote control transmitter 28 and the like, and also drives the control signal transmitting unit 16 to control the retransmitting device 14; Also, selection control of whether to use a digital broadcast wave directly from a broadcasting station or a digital broadcast wave from the retransmitting device 14 is executed. This selection control will be described later in detail.
- the retransmitting apparatus 14 is provided with an RF (high frequency) input unit 3 having a switch unit 3a.
- Switch section 3 a has two inputs, the one input is connected with the indoor reception antenna 1, the input section of the other side connecting the outdoor receiving antenna (not shown) via the antenna connection portion 2 You can do it.
- This switch part 3a is Manual operation.
- a terrestrial digital broadcast wave from a transmitting station (not shown) is converted into an electric signal by the indoor receiving antenna 1 or the outdoor receiving antenna, and is input to the auto gain controller (AGC) 4 via the RF input unit 3.
- AGC auto gain controller
- the auto gain controller 4 receives the output signal fed back from the detector (DET) 5 and keeps the received signal level constant. Specifically, the auto gain controller 4 operates to cancel the level fluctuation of the transmission path between the transmitting station and the indoor receiving antenna 1 and to keep the level of the received signal input to the channel selection filter 6 constant.
- the channel selection filter 6 can change the transmission center frequency by a given control voltage.
- the control voltage is supplied from a control signal demodulation unit (D ec) 10 and corresponds to the channel selected by the digital broadcast receiver 17.
- the signal of the frequency component corresponding to the channel selected by the digital broadcast receiving device 17 is extracted by the channel selection filter 6 and supplied to the variable gain amplifier (Gain) 7.
- the variable gain amplifier 7 receives the control voltage supplied by the control signal demodulation unit 10, amplifies the signal with a gain based on the control voltage, and supplies the amplified signal to the low-pass filter (LPF) 8. I do.
- the low-pass filter 8 reduces harmonics contained in the signal and supplies the signal to the retransmission indoor antenna 13.
- the retransmission indoor antenna 13 transmits a digital broadcast wave of a frequency component corresponding to the channel selected by the digital broadcast receiving device 17 to the digital broadcast receiving device 17.
- the retransmission indoor antenna 13 and the indoor reception antenna 1 are arranged so as to sandwich the substantially rectangular flat conductor 18 so that their transmission directions are opposite to each other. Constructs an antenna set.
- the indoor receiving antenna 1 and the retransmitting indoor antenna 1 have orthogonal polarization directions.
- the retransmitting device 14 is housed in a shielded case so as not to receive radio wave interference of transmission and reception, and is in a form added to the antenna set.
- the signal receiving section 9 receives a control signal from the control signal transmitting section 16 provided on the digital broadcast receiving apparatus 17 side, converts the control signal into an electric signal, and supplies the electric signal to the control / control signal demodulating section 10. .
- the control signal demodulation unit 10 decodes the command by demodulating the received control signal, and controls ON / OFF of the power switch 11, gain control of the variable gain amplifier 7, and transmission of the channel selection filter 6. Performs center frequency change control. In order to control the transmission center frequency change, a table corresponding to the control signal (code) from the digital broadcast receiver 17 and the control voltage value (control voltage applied to the channel selection filter 6) may be provided. .
- a signal indicating the control voltage value itself (the control voltage applied to the channel selection filter 6) based on the selected channel may be supplied from the digital broadcast receiving device 17.
- the power switch 11 is a switch for switching whether or not to supply the power from the power input unit 12 to the auto gain controller 4 or the like (ON / OFF of the retransmitting device 14). It should be noted that the power from the power input unit 12 is constantly supplied to the control signal demodulation unit 10 without passing through the power switch 11.
- the control signal transmitting section 16 provided on the digital broadcast receiving apparatus 17 side is controlled by the microcomputer 31 built in the digital broadcast receiving apparatus 17.
- the microphone port computer 31 drives the control signal transmission section 16 based on a channel selection signal that is received when the user selects a channel with the remote control transmitter 28, Information indicating that the channel has been selected (which frequency should be selectively transmitted) is transmitted to the retransmitter 14. Similarly, the control signal transmitting section 16 is driven. Thus, a signal for ON / OFF control of the power switch 11 and a gain control of the gain variable amplifier 7 can be given to the retransmitting device 14.
- the polarization plane of the indoor receiving antenna 1 is made to coincide with the polarization direction of the direct digital broadcast wave from the broadcasting station (this makes the polarization direction of the retransmitted wave equal to that of the direct digital broadcast wave). It will be orthogonal to the polarization direction). Also, when the polarization direction of the digital broadcast wave directly from the broadcasting station is registered in the digital transmitting / receiving device 17 and the polarization direction of the indoor antenna 15 is switched to selectively receive the direct wave and the retransmitted wave, The indoor antenna 15 can recognize the polarization plane to be received.
- the retransmitted wave will be vertically polarized, so when receiving the retransmitted wave, the digital broadcast receiver 17 will be connected to the indoor antenna 15
- a received signal from the second element 15b is used, and when a direct wave that is a horizontally polarized wave is received, a process for using the received signal from the first element 15a is performed.
- the digital broadcast receiving device 17 When the digital broadcast receiving device 17 is turned on, the power-on instruction of the retransmitting device 14 is not issued at the beginning, and first, the indoor receiving antenna 15 directly receives the digital broadcast wave from the transmitting station. Try. At this time, since a direct wave which is a horizontally polarized wave is received, the received signal from the first element 15a is adopted, and the received signal quality value at this time is stored in the memory 32. Next, digital broadcast receiving apparatus 17 transmits a signal serving as a power ON command, a signal indicating which channel has been selected, and the like to retransmitting apparatus 14. Further, switching processing is performed so as to adopt the reception signal from the second element 15b.
- the retransmitting device 14 receives the above signal at the control signal receiving unit 9.
- control The signal demodulation unit 10 demodulates the above signal, grasps the control contents, turns on the power switch 11, and performs control corresponding to the center frequency of the channel selection filter 6 corresponding to the selected channel. Generate voltage. Also, a control voltage of the variable gain amplifier 7 for determining the transmission output level is generated.
- the digital broadcast receiving apparatus 17 receives the broadcast wave from the retransmitting apparatus 14 at the second element 15b, and acquires the reception quality value. Then, while comparing the reception quality value of the broadcast wave from the retransmission device 14 with the reception quality value of the direct wave already stored in the memory 32, the reception of the broadcast wave from the retransmission device 14 is performed. A control signal is transmitted to retransmission device 14 in order to adjust the transmission power of variable gain amplifier 7 so that the quality value becomes the best. If the reception quality value of the broadcast wave from the retransmission device 14 does not exceed the reception quality value of the direct wave already stored in the memory 32, the retransmission device 14 is not used.
- the digital broadcast receiver 17 sends a power-off command signal to the retransmitter 14 so that the power switch 11 is turned off in order to perform direct reception from the transmitting station. Further, the digital broadcast receiving apparatus 17 employs the first element 15a of the indoor receiving antenna 15 in order to change the polarization direction of the indoor receiving antenna 15 for direct broadcast wave reception. On the other hand, when the reception quality value of the broadcast wave from the retransmission device 14 exceeds the reception quality value of the direct wave stored in the memory 32, the power of the retransmission device 14 is left as it is. The indoor antenna 15 is also kept in the state where the second element 15b is used.
- one of the elements of the indoor receiving antenna 15 is selected to obtain the received signal quality of the digital broadcast wave from the retransmitting device 14, and the other element is selected to receive the signal from the transmitting station. Processing for acquiring the received signal quality of digital broadcast waves and processing for comparing both received signal qualities to determine which digital broadcast wave to use are performed.
- the digital broadcast receiver 17 When a viewer turns off the power of the digital broadcast receiver 17 or switches to a broadcast reception mode that does not depend on terrestrial waves such as satellite or cable, the digital broadcast receiver 17 A control signal is transmitted by the control signal transmission unit 16 to turn off the power switch 11.
- the direct wave or the retransmitted wave is changed when the channel is changed.
- the selection confirmation operation of the good reception condition may not be performed.
- the period without such selection confirmation operation is, for example, until the next day, or until one week has elapsed, or until the user gives a reconfirmation command to the digital broadcast receiving device 17 next time. It is possible to do.
- the operation of confirming the selection of favorable reception conditions of the direct wave / retransmission wave may be performed at the time of installation of the system or accompanying the local channel search after moving.
- the installation area of the system is known and the radio wave reception situation in the area is known, it may be possible to know in advance which of the direct wave or the retransmission wave is preferable for each channel. In such a case, the information may be registered in the memory 32 of the digital broadcast receiver 17 without the selection confirmation operation.
- the retransmitting device 14 does not retransmit all the broadcast waves in the broadcasting band, but works in conjunction with the channel that the digital broadcast receiving device 17 tries to receive, and the frequency band of the receiving channel. Since only the data is selectively retransmitted, the coupling between transmission and reception can be reduced. Also, in this embodiment, the retransmission indoor antenna 13 and the indoor reception antenna 1 are arranged with the conductor 18 interposed therebetween so that the transmission directions are opposite to each other. Since the direction can be changed by exactly 180 degrees, the wraparound of the transmitted wave and the received wave can be reduced. Furthermore, in this embodiment, since the indoor receiving antenna 1 and the retransmitting indoor antenna 13 have mutually orthogonal polarization directions, it is easy to separate the transmitted wave from the received wave, and to suppress oscillation. Can be.
- the present invention even when a digital broadcast receiving apparatus is installed at a place away from a window, stable reception can be performed by an indoor receiving antenna by a retransmitted wave from a retransmitting apparatus. Will be.
- the retransmitting device retransmits without changing the frequency from the transmitting station, so there is no need to replace service information and the circuit can be simplified.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/493,837 US7624419B2 (en) | 2001-11-02 | 2002-10-29 | Re-transmitter and digital broadcast receiving system |
GB0411811A GB2401499B (en) | 2001-11-02 | 2002-10-29 | Re-transmitter and digital broadcast receiving system |
KR1020047006575A KR100593518B1 (ko) | 2001-11-02 | 2002-10-29 | 재송신 장치 및 디지털 방송 수신 시스템 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001337897A JP3920626B2 (ja) | 2001-11-02 | 2001-11-02 | 再送信装置及びディジタル放送受信システム |
JP2001-337897 | 2001-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003039136A1 true WO2003039136A1 (en) | 2003-05-08 |
Family
ID=19152468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/011247 WO2003039136A1 (en) | 2001-11-02 | 2002-10-29 | Re-trasmitter and digital broadcast receiving system |
Country Status (6)
Country | Link |
---|---|
US (1) | US7624419B2 (ja) |
JP (1) | JP3920626B2 (ja) |
KR (1) | KR100593518B1 (ja) |
CN (1) | CN1575584A (ja) |
GB (1) | GB2401499B (ja) |
WO (1) | WO2003039136A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100446553C (zh) * | 2004-02-17 | 2008-12-24 | 索尼株式会社 | 用于tv自动增益控制(agc)的系统 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7538825B2 (en) | 2004-08-31 | 2009-05-26 | Sanyo Electric Co., Ltd. | Wireless redistribution system for terrestrial digital television broadcasting |
FR2881014A1 (fr) * | 2005-01-14 | 2006-07-21 | Thomson Licensing Sa | Dispositif et procede de reemission de canaux numeriques emis a des frequences determinees au sein d'une zone spectrale commune a l'emission de canaux analogiques |
KR100710308B1 (ko) * | 2005-01-25 | 2007-04-23 | 엘지전자 주식회사 | 유료 이동형 방송 서비스를 위한 데이터 구조, 유료이동형 방송 서비스 방법, 및 이동형 방송 수신기 |
JP4577792B2 (ja) * | 2005-03-23 | 2010-11-10 | パイオニア株式会社 | 伝送システム、送信側伝送器、伝送方法、及びコンピュータプログラム |
WO2006136981A2 (en) * | 2005-06-21 | 2006-12-28 | Koninklijke Philips Electronics N.V. | Apparatus and method for relaying broadcast singals |
KR100859557B1 (ko) * | 2005-12-26 | 2008-09-23 | 주식회사 케이엠더블유 | 알에프 중계기 |
JP4675793B2 (ja) * | 2006-02-06 | 2011-04-27 | Dxアンテナ株式会社 | 受信装置及び伝送装置 |
JP2007325153A (ja) * | 2006-06-05 | 2007-12-13 | Matsushita Electric Ind Co Ltd | デジタル放送受信機 |
JP2008066803A (ja) * | 2006-09-04 | 2008-03-21 | Sony Corp | 再送信システム並びに再送信装置 |
TW201031208A (en) * | 2009-02-06 | 2010-08-16 | Wistron Corp | Media management device, system and method thereof |
US9066154B2 (en) * | 2009-11-13 | 2015-06-23 | Triveni Digital, Inc. | System and method for enhanced television and delivery of enhanced television content |
CN112202468B (zh) * | 2020-09-27 | 2022-02-18 | Oppo(重庆)智能科技有限公司 | 射频电路及其控制方法、终端设备、放大器系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0865662A (ja) * | 1994-08-23 | 1996-03-08 | Hitachi Ltd | 光伝送テレビジョン受像機および光送信手段ならびに光伝送テレビジョンシステム |
JPH11298421A (ja) * | 1998-04-13 | 1999-10-29 | Nippon Hoso Kyokai <Nhk> | 同期中継装置 |
JP2000115044A (ja) * | 1998-10-09 | 2000-04-21 | Kyocera Ddi Mirai Tsushin Kenkyusho:Kk | 偏波ダイバーシティ伝送方式 |
Family Cites Families (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4317227A (en) * | 1980-06-09 | 1982-02-23 | Zenith Radio Corporation | Multi-mode automatic channel frequency synthesis system |
KR920010163B1 (ko) * | 1990-12-18 | 1992-11-19 | 삼성전자 주식회사 | 공기조화기의 압축기 운전주파수제어장치 및 그 방법 |
KR940001977B1 (ko) * | 1990-12-31 | 1994-03-12 | 삼성전자 주식회사 | Tv의 미세조정 튜닝 데이타 메모리방법 |
AU684549B2 (en) * | 1993-09-28 | 1997-12-18 | Kabushiki Kaisha Toshiba | Selective diversity system |
US6021119A (en) * | 1994-06-24 | 2000-02-01 | Fleetwood Group, Inc. | Multiple site interactive response system |
NO960306L (no) * | 1995-01-27 | 1996-07-29 | Nec Corp | Anordning ved mobil satelittkommunikasjon |
US5708961A (en) * | 1995-05-01 | 1998-01-13 | Bell Atlantic Network Services, Inc. | Wireless on-premises video distribution using digital multiplexing |
EP0750405B1 (en) * | 1995-06-21 | 2003-01-15 | Nec Corporation | Cable loss equalization system used in wireless communication equipment |
US6434374B1 (en) * | 1996-03-29 | 2002-08-13 | Thomson Licensing S.A. | Apparatus for controlling the conversion gain of a down converter |
CA2216573C (en) * | 1996-10-01 | 2006-03-14 | Sony Corporation | Digital tuner having ieee 1394 serial bus interface for providing a plurality of selected programs as a functional unit |
JPH10145188A (ja) * | 1996-11-07 | 1998-05-29 | Sony Corp | 受信装置 |
US5880721A (en) * | 1997-07-14 | 1999-03-09 | Yen; Kerl | Radio computer audio-video transmission device |
US6259891B1 (en) * | 1997-09-04 | 2001-07-10 | Hughes Electronics Corporation | Adapter and method for use in a portable communication signal receiver system |
JP3889885B2 (ja) * | 1998-02-27 | 2007-03-07 | シャープ株式会社 | ミリ波送信装置、ミリ波受信装置、ミリ波送受信システム及び電子機器 |
JP3059692U (ja) * | 1998-12-08 | 1999-07-13 | 船井電機株式会社 | チャンネルプリセット装置 |
JP3480689B2 (ja) * | 1998-12-17 | 2003-12-22 | 船井電機株式会社 | テレビジョン受信装置 |
US20020196843A1 (en) * | 1999-03-23 | 2002-12-26 | Itzik Ben-Bassat | Satellite communication card |
JP3663323B2 (ja) * | 1999-04-05 | 2005-06-22 | シャープ株式会社 | ミリ波送信装置およびミリ波受信装置 |
US6526580B2 (en) * | 1999-04-16 | 2003-02-25 | Digeo, Inc. | Broadband data broadcasting service |
US6263503B1 (en) * | 1999-05-26 | 2001-07-17 | Neal Margulis | Method for effectively implementing a wireless television system |
US6690657B1 (en) * | 2000-02-25 | 2004-02-10 | Berkeley Concept Research Corporation | Multichannel distributed wireless repeater network |
JP2001069475A (ja) * | 1999-08-27 | 2001-03-16 | Pioneer Electronic Corp | ケーブルテレビジョンの端末装置 |
JP2001186073A (ja) | 1999-12-24 | 2001-07-06 | Japan Radio Co Ltd | 無線中継装置及び無線中継システム |
JP3371887B2 (ja) * | 2000-03-23 | 2003-01-27 | 株式会社村田製作所 | 移動体通信装置及びそれに用いる高周波複合部品 |
US6647015B2 (en) * | 2000-05-22 | 2003-11-11 | Sarnoff Corporation | Method and apparatus for providing a broadband, wireless, communications network |
JP4529262B2 (ja) * | 2000-09-14 | 2010-08-25 | ソニー株式会社 | 高周波モジュール装置及びその製造方法 |
FI20002129A (fi) * | 2000-09-28 | 2002-03-29 | Nokia Corp | Menetelmä ja järjestely paikallisen laajakaistaisen datavirran langattomaksi jakamiseksi |
JP2002111615A (ja) * | 2000-10-03 | 2002-04-12 | Sharp Corp | 放送信号受信システム |
WO2002047388A2 (en) * | 2000-11-14 | 2002-06-13 | Scientific-Atlanta, Inc. | Networked subscriber television distribution |
US8601519B1 (en) * | 2000-12-28 | 2013-12-03 | At&T Intellectual Property I, L.P. | Digital residential entertainment system |
US8291457B2 (en) * | 2001-05-24 | 2012-10-16 | Vixs Systems, Inc. | Channel selection in a multimedia system |
-
2001
- 2001-11-02 JP JP2001337897A patent/JP3920626B2/ja not_active Expired - Fee Related
-
2002
- 2002-10-29 WO PCT/JP2002/011247 patent/WO2003039136A1/ja active Application Filing
- 2002-10-29 GB GB0411811A patent/GB2401499B/en not_active Expired - Fee Related
- 2002-10-29 US US10/493,837 patent/US7624419B2/en not_active Expired - Fee Related
- 2002-10-29 KR KR1020047006575A patent/KR100593518B1/ko not_active IP Right Cessation
- 2002-10-29 CN CNA028209443A patent/CN1575584A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0865662A (ja) * | 1994-08-23 | 1996-03-08 | Hitachi Ltd | 光伝送テレビジョン受像機および光送信手段ならびに光伝送テレビジョンシステム |
JPH11298421A (ja) * | 1998-04-13 | 1999-10-29 | Nippon Hoso Kyokai <Nhk> | 同期中継装置 |
JP2000115044A (ja) * | 1998-10-09 | 2000-04-21 | Kyocera Ddi Mirai Tsushin Kenkyusho:Kk | 偏波ダイバーシティ伝送方式 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100446553C (zh) * | 2004-02-17 | 2008-12-24 | 索尼株式会社 | 用于tv自动增益控制(agc)的系统 |
Also Published As
Publication number | Publication date |
---|---|
JP2003143494A (ja) | 2003-05-16 |
GB2401499A (en) | 2004-11-10 |
GB2401499B (en) | 2005-06-08 |
US20050022249A1 (en) | 2005-01-27 |
GB0411811D0 (en) | 2004-06-30 |
CN1575584A (zh) | 2005-02-02 |
JP3920626B2 (ja) | 2007-05-30 |
KR100593518B1 (ko) | 2006-06-28 |
KR20050040850A (ko) | 2005-05-03 |
US7624419B2 (en) | 2009-11-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100593518B1 (ko) | 재송신 장치 및 디지털 방송 수신 시스템 | |
JP4212415B2 (ja) | 放送受信システム | |
US7016435B2 (en) | Broadcast receiver having automatic gain control function | |
WO2003071784A1 (en) | Television system | |
JPH08293720A (ja) | 受信装置、信号復調方法、アンテナ装置、受信システム、およびアンテナ方向調整方法 | |
JP2004165860A (ja) | ディジタル放送受信装置 | |
JP3743796B2 (ja) | 放送受信システム | |
JP3865715B2 (ja) | 地上デジタルテレビ放送の伝送装置および受信装置 | |
JPH1056391A (ja) | 衛星又はマルチチャンネル多点配信システム局を介して送信されたプログラムの受信装置 | |
JP2001211126A (ja) | 放送受信装置及びディジタル放送方法 | |
JP2008066803A (ja) | 再送信システム並びに再送信装置 | |
JP2002354450A (ja) | Stb遠隔操作システム | |
JP3851255B2 (ja) | ディジタル放送受信装置 | |
JP2004208186A (ja) | ディジタル放送受信装置 | |
JP2003018563A (ja) | 受信信号伝送システム、再送信装置、及び、受信装置 | |
JP2004356830A (ja) | テレビ信号ワイヤレス送受信システム | |
KR20030064595A (ko) | 피아이피 기능을 구비한 방송 수신기 | |
KR100770568B1 (ko) | Rf 리모컨을 이용한 다중출력 방송수신 시스템 | |
JP2002158935A (ja) | テレビワイヤレス伝送システム | |
JPS631795B2 (ja) | ||
CN101335850A (zh) | 图像显示方法和使用该方法的显示设备 | |
JP2548716B2 (ja) | ワイヤレスリモコン式ブ−スタ | |
JP2001238148A (ja) | テレビジョン受信装置 | |
KR101253163B1 (ko) | 방송 수신기 | |
JP4017621B2 (ja) | 地上波デジタルtv放送の無線再配信システム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN GB KR US |
|
ENP | Entry into the national phase |
Ref document number: 0411811 Country of ref document: GB Kind code of ref document: A Free format text: PCT FILING DATE = 20021029 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20028209443 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10493837 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020047006575 Country of ref document: KR |