ES2033665T1 - Procedimiento y dispositivo de transmision de senales de video en un medio confinado. - Google Patents

Procedimiento y dispositivo de transmision de senales de video en un medio confinado.

Info

Publication number
ES2033665T1
ES2033665T1 ES199091901298T ES91901298T ES2033665T1 ES 2033665 T1 ES2033665 T1 ES 2033665T1 ES 199091901298 T ES199091901298 T ES 199091901298T ES 91901298 T ES91901298 T ES 91901298T ES 2033665 T1 ES2033665 T1 ES 2033665T1
Authority
ES
Spain
Prior art keywords
signal
pct
date
frequency
channel
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
ES199091901298T
Other languages
English (en)
Inventor
Dominique Charpentier
Pierre Degauque
Daniel Degardin
Jacques Baudet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 Charbonnages de France CDF filed Critical Charbonnages de France CDF
Publication of ES2033665T1 publication Critical patent/ES2033665T1/es
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite

Landscapes

  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Radio Relay Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Burglar Alarm Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Radio Transmission System (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Television Systems (AREA)
  • Television Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

EN UNA ZONA DE EMISION (1) SE EMITE EN UN MEDIO CONFINADO POR HAZ HERTZIANO, UNA SEÑAL PORTADORA DE HIPERFRECUENCIA, MODULADA POR UNA SEÑAL DE VIDEO DE LA QUE SE CONOCE LA FRECUENCIA Y EL FORMATO DE UNA SEÑAL DE SINCRONIZACION DE LINEA. EN UNA ZONA DE RECEPCION SE CAPTAN DOS SEÑALES SEGUN DOS EJES PRIVILEGIADOS DECALADOS ANGULARMENTE, SE DEMODULA EN FRECUENCIA CADA UNA DE LAS SEÑALES SEGUN VIAS DE TRATAMIENTO IDENTICAS, SE VERIFICA LA EXISTENCIA EN LA SEÑAL EMITIDA DESDE UNA DE LAS VIAS, LLAMADA VIA DE SALIDA, DE UNA SEÑAL PERIODICA DE FRECUENCIA IGUAL A LA FRECUENCIA DE SINCRONIZACION DE LINEA Y SE SELECCIONA ESTA SEÑAL SI ESTA PRUEBA ES POSITIVA. EN CASO DE DESAPARICION DE LA SEÑAL PERIODICA, SE APLICA ESTA PRUEBA A LA OTRA VIA, SI ES POSITIVA, SE SELECCIONA ESTA OTRA VIA HASTA LA DESAPARICION DE ESTA SEÑAL PERIODICA, YA ASI SUCESIVAMENTE. TAL PROCESO SE APLICA EN PARTICULAR EN UN TUNEL.
ES199091901298T 1989-12-08 1990-12-07 Procedimiento y dispositivo de transmision de senales de video en un medio confinado. Pending ES2033665T1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8916304A FR2655801B1 (fr) 1989-12-08 1989-12-08 Procede et dispositif de transmission de signaux video en milieu confine.

Publications (1)

Publication Number Publication Date
ES2033665T1 true ES2033665T1 (es) 1993-04-01

Family

ID=9388327

Family Applications (1)

Application Number Title Priority Date Filing Date
ES199091901298T Pending ES2033665T1 (es) 1989-12-08 1990-12-07 Procedimiento y dispositivo de transmision de senales de video en un medio confinado.

Country Status (10)

Country Link
US (1) US5335006A (es)
EP (1) EP0504275B1 (es)
AT (1) ATE125994T1 (es)
AU (1) AU7035691A (es)
CA (1) CA2069748A1 (es)
DE (1) DE69021394T2 (es)
ES (1) ES2033665T1 (es)
FR (1) FR2655801B1 (es)
WO (1) WO1991009502A1 (es)
ZA (1) ZA909848B (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
YU9492A (sh) * 1991-02-05 1995-03-27 Hoechst Ag. 2,4- i 2,5-bis-tetrazolilni piridini i postupak za njihovo dobijanje
IL121636A (en) * 1997-08-26 2000-08-31 Eureka U S A Ltd Apparatus for wireless transfer of video from a computer to a television set
US20120075459A1 (en) * 2010-09-23 2012-03-29 Stuehmeyer Timothy E Miniature viewing camera and remote receiver unit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626925C3 (de) * 1976-06-16 1981-01-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Ausgleich von Ausbreitungsschwankungen bei Nachrichtenübertragungssystemen
JPS58186271A (ja) * 1982-04-23 1983-10-31 Sharp Corp Ｖｔｒにおけるテスト信号自動送出装置
US4584713A (en) * 1983-07-06 1986-04-22 Motorola, Inc. Signal quality steered diversity
US4831438A (en) * 1987-02-25 1989-05-16 Household Data Services Electronic surveillance system
US4977616A (en) * 1987-11-30 1990-12-11 Motorola, Inc. Antenna selection control circuit
US5128755B1 (en) * 1990-07-25 1999-03-23 Wireless Technology Inc Wireless real time video system and method of making the same

Also Published As

Publication number Publication date
US5335006A (en) 1994-08-02
ATE125994T1 (de) 1995-08-15
WO1991009502A1 (fr) 1991-06-27
FR2655801A1 (fr) 1991-06-14
EP0504275B1 (fr) 1995-08-02
ZA909848B (en) 1991-10-30
DE69021394T2 (de) 1996-02-01
FR2655801B1 (fr) 1992-03-13
EP0504275A1 (fr) 1992-09-23
DE69021394D1 (de) 1995-09-07
CA2069748A1 (en) 1991-06-09
AU7035691A (en) 1991-07-18

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