ES2108620A1 - Process and apparatus for measuring the carrier/noise ratio in a television channel - Google Patents

Process and apparatus for measuring the carrier/noise ratio in a television channel

Info

Publication number
ES2108620A1
ES2108620A1 ES09402587A ES9402587A ES2108620A1 ES 2108620 A1 ES2108620 A1 ES 2108620A1 ES 09402587 A ES09402587 A ES 09402587A ES 9402587 A ES9402587 A ES 9402587A ES 2108620 A1 ES2108620 A1 ES 2108620A1
Authority
ES
Spain
Prior art keywords
carrier
level
detector
noise ratio
noise
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.)
Granted
Application number
ES09402587A
Other languages
Spanish (es)
Other versions
ES2108620B1 (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

The object is to reduce considerably the volume and cost of the apparatus. The video carrier is measured by using a detector of the maximum level of carrier (6), said detector being connected to a microprocessor (10) which causes the tuner (VHF/UHF) (2) to displace the tuning of the channel to an intermediary zone between the video carrier and the audio carrier, recalculating and acting subsequently on the status of the input attenuators as a function of the carrier level. The microprocessor (10) is also connected to a rapid detector (7) of the noise level for which it changes to this detector level, storing the minimum noise value, thereby obtaining the carrier/noise ratio. The process is repeated for each image, so that one of the measured values of the noise level will surely fall within the zone wherein there is practically no carrier influence, thereby obtaining a reliable final measurement to evaluate 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 true ES2108620A1 (en) 1997-12-16
ES2108620B1 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683282A (en) * 1969-02-04 1972-08-08 Paolo D Amato Process and automatic device for signal-to-noise ratio measurement of a television signal
US4721997A (en) * 1986-06-02 1988-01-26 Sencore, Inc. Signal to noise ratio measurement by sampling noise outside carrier frequency
EP0588662A1 (en) * 1992-09-18 1994-03-23 Leader Electronics Corp. CN ratio measuring apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266636B (en) * 1992-04-10 1996-01-24 Barry Donald Ruberry Miles Video processing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683282A (en) * 1969-02-04 1972-08-08 Paolo D Amato Process and automatic device for signal-to-noise ratio measurement of a television signal
US4721997A (en) * 1986-06-02 1988-01-26 Sencore, Inc. Signal to noise ratio measurement by sampling noise outside carrier frequency
EP0588662A1 (en) * 1992-09-18 1994-03-23 Leader Electronics Corp. CN ratio measuring apparatus

Also Published As

Publication number Publication date
WO1996019901A1 (en) 1996-06-27
ES2108620B1 (en) 1998-08-01

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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