[특허]Method and apparatus for improving the quality of AM compatible digital broadcast system signals in the presence of dist

Method and apparatus for improving the quality of AM compatible digital broadcast system signals in the presence of dist 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-025/00 H04L-027/00
출원번호	US-0603768 (1996-02-20)
발명자 / 주소	Dapper Mark J. Carlin Barry W. Geile Michael J.
출원인 / 주소	USA Digital Radio Partners, L.P.
인용정보	피인용 횟수 : 51 인용 특허 : 0

초록 ▼

A system and method are provided for reducing perceived distortion in an output audio signal derived from an amplitude modulated compatible digital broadcast signal having an analog portion and a digital portion. The digital portion of this signal is demodulated to produce a demodulated digital signal and the analog portion of the signal is demodulated to produce a demodulated analog signal. The noise in the demodulated digital signal is measured and an estimate of the signal-to-noise ratio is derived. This estimated signal-to-noise ratio is compared with a threshold level which is set at the minimum acceptable signal quality for the digital signal. Based upon the estimated signal-to-noise ratio, a switch directs either the analog derived audio output or the digitally derived audio output as the system output signal.

대표청구항 ▼

[ We claim:] [1.] A system for reducing perceived distortion in an output audio signal derived from an amplitude modulated compatible digital broadcast signal having an analog portion and a digital portion, said system comprising:(a) means for demodulating said digital portion of said signal to produce a demodulated digital signal having a signal-to-noise ratio;(b) means for demodulating said analog portion of said signal to produce a demodulated analog signal;(c) means for estimating the signal-to-noise ratio in the demodulated digital signal;(d) means for comparing the estimated signal-to-noise ratio in the demodulated digital signal to a threshold level set at the minimum acceptable signal quality; and(e) means responsive to said means for comparing for switching said output audio signal between said demodulated digital signal and said demodulated analog signal.

이 특허를 인용한 특허 (51)

Pahuja, Ashwini; Jen, Jason Tsuchi, Adaptive bandwidth management of IBOC audio signals during blending.
상세보기
Kroeger, Brian William, Audio blend method and apparatus for AM and FM in band on channel digital audio broadcasting.
상세보기
Matthews, Greg; Duff, Winslow K; Martin, Daniel; Shankar, Uday S; Ressler, Heather, Auto-titration bi-level pressure support system and method of using same.
상세보기
Matthews, Greg; Duff, Winslow K; Martin, Daniel; Shankar, Uday S; Ressler, Heather, Auto-titration bi-level pressure support system and method of using same.
상세보기
Matthews, Greg; Kane, Michael T.; Duff, Winslow K.; Siirola, Rochelle; Martin, Daniel; Ressler, Heather; Shankar, Uday, Auto-titration pressure support system and method of using same.
상세보기
Matthews,Greg; Kane,Michael T.; Duff,Winslow K.; Eisert,Rochelle; Martin,Daniel, Auto-titration pressure support system and method of using same.
상세보기
Wildhagen,Jens; Schill,Dietmar, DRM/AM simulcast.
상세보기
Chan, Hark C., Decryption and decompression based audio system.
상세보기
Vojcic, Branimir R; Bajic, Ivan V; Haghighat, Javad, Joint source-channel decoding with source sequence augmentation.
상세보기
Pahuja, Ashwini, Look ahead metrics to improve blending decision.
상세보기
Hitosi Matui,JPX, Maximum likelihood sequence estimation receiver and method of receiving maximum-likelihood sequence estimates.
상세보기
Don Roy Goldston ; David Carl Hartup ; Marcus McLenn Matherne, Method and apparatus for AM compatible digital broadcasting.
상세보기
David Carl Hartup ; Don Roy Goldston, Method and apparatus for demodulating and equalizing an AM compatible digital audio broadcast signal.
상세보기
Hartup David Carl ; Goldston Don R., Method and apparatus for demodulating and equalizing an AM compatible digital audio broadcast signal.
상세보기
Goldston, Don Roy; Matherne, Marcus, Method and apparatus for determining transmission mode and synchronization for a digital audio broadcasting signal.
상세보기
Velez Edgar,CAX ; Dublin Ian,CAX ; Buz Richard ; Yirga Sisay,CAX, Method and apparatus for operating an adaptive decision feedback equalizer.
상세보기
Don Roy Goldston ; Marcus Matherne, Method and apparatus for training sequence identification in an AM compatible digital audio broadcasting system.
상세보기
Goldston Don Roy ; Hartup David Carl ; Matherne Marcus McLenn, Method for equalization of complementary carriers in an AM compatible digital audio broadcast system.
상세보기
Goldston, Don Roy; Hartup, David Carl; Matherne, Marcus McLenn, Method for equalization of complementary carriers in an AM compatible digital audio broadcast system.
상세보기
Goldston, Don Roy; Matherne, Marcus, Method for estimating signal-to-noise ratio of digital carriers in an AM compatible digital audio broadcasting system.
상세보기
Jeske,Daniel R.; Sampath,Ashwin, Method of estimating a signal-to-interference+noise ratio (SINR).
상세보기
Lapaille,C챕dric; Calot,Guillaume, Method of estimating the signal-to-noise ratio in a telecommunications receiver and an application of the method to controlling a transmitter.
상세보기
Sayeed Zulfiquar, Methods of estimating signal-to-noise ratios.
상세보기
Young, Bruce, Multi-mode speaker operating from either digital or analog sources.
상세보기
Becker, Karl-Anton; Obergfell, Philip; Giang, Binh Ton That, Radio receiver for hybrid broadcast systems.
상세보기
Chan, Hark C., Radio receiver for processing digital and analog audio signals.
상세보기
Chan, Hark C., Receiver storage system for audio program.
상세보기
Chan,Hark C., Receiver storage system for audio program.
상세보기
Chan, Hark C, Receiver system for audio information.
상세보기
Chan,Hark C., Receiving system operating on multiple audio programs.
상세보기
Corts, David; Wells, Bryce; Signorelli, Paul; Hunter, Lee; Snyder, Terrance, System and method for generating multimedia accompaniments to broadcast data.
상세보기
Corts, David; Wells, Bryce; Signorelli, Paul; Hunter, Lee; Snyder, Terrance, System and method for generating multimedia accompaniments to broadcast data.
상세보기
Corts, David; Wells, Bryce; Signorelli, Paul; Hunter, Lee; Snyder, Terrance, System and method for generating multimedia accompaniments to broadcast data.
상세보기
Corts, David; Wells, Bryce; Signorelli, Paul; Hunter, Lee; Snyder, Terrance, System and method for generating multimedia accompaniments to broadcast data.
상세보기
Corts, David; Wells, Bryce; Signorelli, Paul; Hunter, Lee; Snyder, Terrance, System and method for transmitting digital multimedia data with analog broadcast data.
상세보기
Vojcic, Branimir R; Dogan, Hakan, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Dogan, Hakan, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Dogan, Hakan, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Shayegh, Farnaz, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Shayegh, Farnaz, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Shayegh, Farnaz, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Shayegh, Farnaz; Dogan, Hakan; Lee, Wookwon, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Shayegh, Farnaz; Dogan, Hakan; Lee, Wookwon, Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems.
상세보기
Vojcic, Branimir R; Papaharalabos, Stylianos, Systems and methods for encoding and decoding of check-irregular non-systematic IRA codes.
상세보기
Vojcic, Branimir R; Papaharalabos, Stylianos, Systems and methods for encoding and decoding of check-irregular non-systematic IRA codes.
상세보기
Chan, Hark C, Transmission and receiver system operating on different frequency bands.
상세보기
Chan, Hark C, Transmission and receiver system operating on different frequency bands.
상세보기
Chan, Hark C., Transmission and receiver system operating on different frequency bands.
상세보기
Chan, Hark C., Transmission and receiver system operating on different frequency bands.
상세보기
Chan, Hark C, Transmission and receiver system operating on multiple audio programs.
상세보기
Chan, Hark C., Transmission and receiver system operating on multiple audio programs.
상세보기

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
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
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

Method and apparatus for improving the quality of AM compatible digital broadcast system signals in the presence of dist 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (51)

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

연합인증

Method and apparatus for improving the quality of AM compatible digital broadcast system signals in the presence of dist 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

전체(0) 논문(0) 특허(0) 보고서(0)

전체(0) 논문(0) 특허(0) 보고서(0)

이 특허를 인용한 특허 (51)

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트