ES2108620B1 - PROCEDURE AND APPARATUS FOR MEASURING THE CARRIER-NOISE RATIO IN A TELEVISION CHANNEL. - Google Patents

PROCEDURE AND APPARATUS FOR MEASURING THE CARRIER-NOISE RATIO IN A TELEVISION CHANNEL.

Info

Publication number
ES2108620B1
ES2108620B1 ES9402587A ES9402587A ES2108620B1 ES 2108620 B1 ES2108620 B1 ES 2108620B1 ES 9402587 A ES9402587 A ES 9402587A ES 9402587 A ES9402587 A ES 9402587A ES 2108620 B1 ES2108620 B1 ES 2108620B1
Authority
ES
Spain
Prior art keywords
carrier
level
noise ratio
noise
procedure
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.)
Expired - Fee Related
Application number
ES9402587A
Other languages
Spanish (es)
Other versions
ES2108620A1 (en
Inventor
Raguer Antonio Mas
Grebol Roberto Pous
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.)
INSTRUMENTACION ELECTRONICA PR
Original Assignee
INSTRUMENTACION ELECTRONICA PR
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 INSTRUMENTACION ELECTRONICA PR filed Critical INSTRUMENTACION ELECTRONICA PR
Priority to ES9402587A priority Critical patent/ES2108620B1/en
Priority to PCT/ES1995/000150 priority patent/WO1996019901A1/en
Publication of ES2108620A1 publication Critical patent/ES2108620A1/en
Application granted granted Critical
Publication of ES2108620B1 publication Critical patent/ES2108620B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

PROCEDIMIENTO Y APARATO DE MEDIDA DE LA RELACION PORTADORA-RUIDO EN UN CANAL DE TELEVISION. QUE TIENE POR OBJETO REDUCIR CONSIDERABLEMENTE EL VOLUMEN Y COSTE DEL APARATO. REALIZA LA MEDIDA DE LA PORTADORA DE VIDEO CON UN DETECTOR DE NIVEL MAXIMO DE PORTADORA (6) Y ESTA CONECTADO A UN MICROPROCESADOR (10) EL CUAL DESPLAZA LA SINTONIA DEL SINTONIZADOR VHF/UHF (2) DEL CANAL A UNA ZONA INTERMEDIA ENTRE LA PORTADORA DE VIDEO Y LA DE AUDIO, RECALCULANDO Y ACTUANDO POSTERIORMENTE SOBRE EL ESTADO DE LOS ATENUADORES DE ENTRADA EN FUNCION DEL NIVEL DE LA PORTADORA. EL MICROPROCESADOR (10) ADEMAS ESTA CONECTADO A UN DETECTOR RAPIDO DE NIVEL DE RUIDO (7) PARA LO QUE CAMBIA A ESTE NIVEL DE DETECTOR, ALMACENANDO EL VALOR MINIMO DEL RUIDO, OBTENIENDO LA RELACION PORTADORA-RUIDO. REPITIENDOSE EL PROCESO CON CADA IMAGEN, DE MANERA QUE ALGUNA DE LAS MEDIDAS REALIZADAS DEL NIVEL DE RUIDO SEGURO QUE CAE EN LA ZONA EN QUE NO HAY PRACTICAMENTE INFLUENCIA DE PORTADORA, OBTENIENDOSE UNA MEDIDA FINAL FIABLE PARA VALORAR LA CALIDAD DE IMAGEN.PROCEDURE AND APPARATUS FOR MEASURING THE CARRIER-NOISE RATIO ON A TELEVISION CHANNEL. WHICH IS INTENDED TO REDUCE THE VOLUME AND COST OF THE APPLIANCE CONSIDERABLY. PERFORM THE VIDEO CARRIER MEASUREMENT WITH A MAXIMUM CARRIER LEVEL DETECTOR (6) AND IS CONNECTED TO A MICROPROCESSOR (10) WHICH MOVES THE VHF / UHF TUNER (2) FROM THE CHANNEL TO AN INTERMEDIATE ZONE BETWEEN THE CARRIER VIDEO AND AUDIO, RECALCULATING AND ACTING SUBSEQUENTLY ON THE STATE OF THE INPUT ATTENUATORS DEPENDING ON THE LEVEL OF THE CARRIER. THE MICROPROCESSOR (10) IS ALSO CONNECTED TO A RAPID NOISE LEVEL DETECTOR (7) FOR WHICH IT CHANGES TO THIS DETECTOR LEVEL, STORING THE MINIMUM VALUE OF NOISE, OBTAINING THE CARRIER-NOISE RATIO. REPEATING THE PROCESS WITH EACH IMAGE, SO THAT SOME OF THE MEASURES MADE OF THE SAFE NOISE LEVEL THAT FALLS IN THE AREA IN WHICH THERE IS PRACTICALLY NO INFLUENCE OF THE CARRIER, OBTAINING A RELIABLE FINAL MEASURE TO VALUE THE IMAGE QUALITY.

ES9402587A 1994-12-19 1994-12-19 PROCEDURE AND APPARATUS FOR MEASURING THE CARRIER-NOISE RATIO IN A TELEVISION CHANNEL. Expired - Fee Related ES2108620B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES9402587A ES2108620B1 (en) 1994-12-19 1994-12-19 PROCEDURE AND APPARATUS FOR MEASURING THE CARRIER-NOISE RATIO IN A TELEVISION CHANNEL.
PCT/ES1995/000150 WO1996019901A1 (en) 1994-12-19 1995-12-19 Process and apparatus for measuring the carrier/noise ratio in a television channel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9402587A ES2108620B1 (en) 1994-12-19 1994-12-19 PROCEDURE AND APPARATUS FOR MEASURING THE CARRIER-NOISE RATIO IN A TELEVISION CHANNEL.

Publications (2)

Publication Number Publication Date
ES2108620A1 ES2108620A1 (en) 1997-12-16
ES2108620B1 true ES2108620B1 (en) 1998-08-01

Family

ID=8288303

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9402587A Expired - Fee Related ES2108620B1 (en) 1994-12-19 1994-12-19 PROCEDURE AND APPARATUS FOR MEASURING THE CARRIER-NOISE RATIO IN A TELEVISION CHANNEL.

Country Status (2)

Country Link
ES (1) ES2108620B1 (en)
WO (1) WO1996019901A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100615535B1 (en) * 2004-07-26 2006-08-25 삼성전자주식회사 RF receiver using AGC and methods thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2000353C3 (en) * 1969-02-04 1979-11-29 Rai Radiotelevisione Italiana, Rom Method and device for the automatic measurement of the signal-to-noise ratio
US4721997A (en) * 1986-06-02 1988-01-26 Sencore, Inc. Signal to noise ratio measurement by sampling noise outside carrier frequency
GB2266636B (en) * 1992-04-10 1996-01-24 Barry Donald Ruberry Miles Video processing
JP3135999B2 (en) * 1992-09-18 2001-02-19 リーダー電子株式会社 CN ratio measuring device

Also Published As

Publication number Publication date
WO1996019901A1 (en) 1996-06-27
ES2108620A1 (en) 1997-12-16

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Legal Events

Date Code Title Description
GC2A Exploitation certificate registered application with search report

Effective date: 19991028

FD1A Patent lapsed

Effective date: 20041220