[특허]Apparatus for converting an analog c-band broadcast receiver into a system for simultaneously receiving analog and digit

Apparatus for converting an analog c-band broadcast receiver into a system for simultaneously receiving analog and digit 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04N-005/262
출원번호	US-0409981 (1995-03-24)
발명자 / 주소	Lusignan Bruce B. (Palo Alto CA)
출원인 / 주소	Terrastar, Inc. (Chicago IL 02)
인용정보	피인용 횟수 : 38 인용 특허 : 0

초록 ▼

An adapter for a direct broadcast television system enables owners of existing dish antennas to receive both current analog television broadcasts and new digital television broadcasts via C-Band satellites. The adapter includes a coaxial switch for switching between analog and digital television, a tuneable demodulator for selectively switching between transponders on the C-Band satellites, a channel selector unit for selecting the channel specified by the user from the bit stream output by the demodulator, a channel expander for decompressing the video signal, and a control unit for accepting user commands and controlling the polarization of the received signals, the steering of the TVRO antenna, the demodulated transponder frequency and the demultiplexed channel. The ability to select the user\s channel from multiple channels available on different transponders and different satellites allows the dynamic reassignment of television channels based on system efficiency considerations. The adapter described herein permits a smooth transition from existing television service to a new digital C-Band television service, without requiring a new antenna or removal of the existing antenna. The device is able to simultaneously serve analog and digital TV to both cable and TVRO and C-Band small antennas and enables a smooth, seamless conversion to digital C-Band receivers with only one box. In addition, the system design minimizes satellite costs and equipment conversion costs. Rapid change to 8 channels per transponder for TVRO and cable is then followed by reduction to 3 and 4 channels to permit use of small C-Band antennas without interrupting service to existing customers.

대표청구항 ▼

An apparatus for converting an analog C-Band broadcast receiving system into a system for simultaneously receiving analog C-Band broadcast television signals and digital C-Band broadcast television signals, in which the analog C-Band broadcast receiving system includes an antenna, and an analog receiver for converting the received signal to a television ready signal selected by a user, the apparatus being coupled between the antenna and the analog receiver and between the analog receiver and a video device, said apparatus comprising: a) a control unit having a digital operating mode and an analog operating mode, receiving a mode command from the user for switching the apparatus into either the analog operating mode for receiving the analog C-Band broadcast television signals or into the digital operating mode for receiving the digital C-Band broadcast television signals, receiving a digital channel selection command from the user indicating which digital television channel should be output in the digital operating mode, outputting a digital channel selection signal, and outputting a transponder selection signal; b) a switch having an input being coupled to the antenna for receiving the signal, having a first output being coupled to said analog receiver, having a second output, having a control input being coupled to the control unit, whereby the control unit controls the switch via the control input so that the received signal is output to the second output in the digital operating mode and the received signal is output to the first output in the analog operating mode; c) a demodulator being coupled to the second output of the switch, receiving the received signal in the digital operating mode, receiving the transponder selection signal from the control unit, and demodulating a bit sequence from the received signal at a carrier frequency specified by the transponder selection signal; d) a channel selector receiving the bit sequence from the demodulator, receiving the digital channel selection signal from the control unit, and demultiplexing the bit sequence to form a selected compressed digital television signal; e) a channel expander receiving the selected compressed digital television channel and decompressing the selected compressed digital television signal to form a selected digital television signal; f) a digital-to-analog converter receiving the selected digital television signal and converting the selected digital television signal into an analog television-ready signal; and g) an output coupler being coupled to the video device, receiving the analog television-ready signal from the digital-to analog converter in the digital operating mode, and receiving an additional analog television-ready signal from said analog receiver in the analog operating mode, and outputting the analog television-ready signal from the digital-to analog converter in the digital operating mode and outputting the additional analog television-ready signal in the analog operating mode.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

Apparatus for converting an analog c-band broadcast receiver into a system for simultaneously receiving analog and digit 원문보기

초록 ▼

대표청구항 ▼

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이 특허를 인용한 특허 (38)

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Apparatus for converting an analog c-band broadcast receiver into a system for simultaneously receiving analog and digit 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (38)

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