[특허]Apparatus for demodulating and decoding video signals encoded in different formats

Apparatus for demodulating and decoding video signals encoded in different formats 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-027/06 H04L-007/00
출원번호	US-0501361 (1995-07-12)
발명자 / 주소	Stewart John Sidney (Indianapolis IN)
출원인 / 주소	Thomson Consumer Electronics, Inc. (Indianapolis IN 02)
인용정보	피인용 횟수 : 74 인용 특허 : 0

초록 ▼

An adaptive receiver includes an adaptive demodulator and an adaptive decoder for providing demodulated and decoded output data from a video signal encoded for satellite, terrestrial or cable transmission. The demodulator recovers demodulated output data by using an adaptive timing recovery network and an adaptive carrier recovery network that incorporates a selectable slicer network. In addition, an Automatic Gain Control network within the demodulator provides a gain control output as a function of a difference between signals produced both prior to and following the slicer. The demodulator may also incorporate a signal quality detector that uses carrier recovery network signals to provide an estimate of the error in the demodulated output data. The decoder produces a Viterbi decoded output from the demodulated output data by using a selectable code rate Viterbi decoder.

대표청구항 ▼

A receiver for adaptively processing a carrier modulated with video data in one of a plurality of different modulation formats and wherein said modulating video data is encoded in one of a plurality of different formats, comprising: an adaptive timing recovery network for recovering timing data from said modulated carrier as a function of a received carrier modulation format; an adaptive carrier recovery network responsive to said timing data for recovering modulating data from said modulated carrier; a selectable slicer network, included in said carrier recovery network, for applying a set of decision thresholds to data provided by said carrier recovery network to recover said modulating data, said set of decision thresholds being selected from a plurality of sets of decision thresholds suitable for said different modulation formats; an adaptive Viterbi decoder for Viterbi decoding said recovered modulating data and providing a Viterbi decoded output as a function of a received data encoding format; an adaptive deinterleaver for deinterleaving said Viterbi decoded output and providing an output in accordance with a deinterleaving function selected from a plurality of deinterleaving functions; an adaptive error processor for error correcting said deinterleaved output to provide an error corrected output; and a descrambler for descrambling said error corrected output.

이 특허를 인용한 특허 (74)

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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

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Apparatus for demodulating and decoding video signals encoded in different formats 원문보기

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Apparatus for demodulating and decoding video signals encoded in different formats 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (74)

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