FR2394949A1 - Procede de mesure de signal video non desire du a l'intermodulation entre canaux dans un dispositif de diffusion de television par cable - Google Patents

Procede de mesure de signal video non desire du a l'intermodulation entre canaux dans un dispositif de diffusion de television par cable

Info

Publication number
FR2394949A1
FR2394949A1 FR7819059A FR7819059A FR2394949A1 FR 2394949 A1 FR2394949 A1 FR 2394949A1 FR 7819059 A FR7819059 A FR 7819059A FR 7819059 A FR7819059 A FR 7819059A FR 2394949 A1 FR2394949 A1 FR 2394949A1
Authority
FR
France
Prior art keywords
intermodulation
video signal
channels
measuring
cable television
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
FR7819059A
Other languages
English (en)
Inventor
Henry Louis Baker
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.)
Communications Patents Ltd
Original Assignee
Communications Patents Ltd
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 Communications Patents Ltd filed Critical Communications Patents Ltd
Publication of FR2394949A1 publication Critical patent/FR2394949A1/fr
Pending 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

Abstract

La présente invention concerne un procédé pour mesurer le signal vidéo non désiré dû à l'intermodulation entre canaux dans un dispositif de diffusion de télévision par câble, ledit procédé faisant usage de signaux de trains d'impulsions binaires speudo aléatoires (désigné ci-après par le sigle TIBPA). Le procédé est caractérisé par le fait qu'un signal TIBPA est appliqué à un premier canal, et le signal sur un deuxième canal est mis en corrélation avec un train identique pour fournir une sortie représentative du signal vidéo non désiré dû à l'intermodulation entre les premier et deuxième canaux.
FR7819059A 1977-06-15 1978-06-15 Procede de mesure de signal video non desire du a l'intermodulation entre canaux dans un dispositif de diffusion de television par cable Pending FR2394949A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14636/77A GB1575098A (en) 1977-06-15 1977-06-15 Method for measuring crossview between channels in a wired television broadcasting system

Publications (1)

Publication Number Publication Date
FR2394949A1 true FR2394949A1 (fr) 1979-01-12

Family

ID=10044829

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7819059A Pending FR2394949A1 (fr) 1977-06-15 1978-06-15 Procede de mesure de signal video non desire du a l'intermodulation entre canaux dans un dispositif de diffusion de television par cable

Country Status (13)

Country Link
US (1) US4246608A (fr)
JP (1) JPS5417617A (fr)
AU (1) AU517346B2 (fr)
BE (1) BE868087A (fr)
CA (1) CA1135831A (fr)
CH (1) CH642501A5 (fr)
DE (1) DE2825282A1 (fr)
ES (1) ES470838A1 (fr)
FR (1) FR2394949A1 (fr)
GB (1) GB1575098A (fr)
NL (1) NL7806485A (fr)
SE (1) SE7806839L (fr)
ZA (1) ZA78284B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3020921A1 (de) * 1980-06-03 1981-12-10 Robert Bosch Gmbh, 7000 Stuttgart System zur kontrolle von digitalen videosignalen

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2470501A1 (fr) * 1979-11-22 1981-05-29 France Etat Equipement d'essai de televiseur recepteur de teletexte
NL8300725A (nl) * 1983-02-25 1984-09-17 Optische Ind De Oude Delft Nv Werkwijze en inrichting voor het bepalen van de beeldoverdrachtskwaliteit van een afbeeldend systeem.
JPH0241526A (ja) * 1988-08-02 1990-02-09 Oki Electric Ind Co Ltd ディジタル信号プロセッサ
EP0410056B1 (fr) * 1989-07-28 1994-11-30 Hewlett-Packard Company Mesure de caractéristiques de réseaux optiques de diffusion
US5241538A (en) * 1990-01-18 1993-08-31 Matsushita Electric Industrial Co., Ltd. Transmission apparatus
JP2590644B2 (ja) * 1991-09-13 1997-03-12 日本電気株式会社 無線通信装置及び試験送信機
US5790523A (en) * 1993-09-17 1998-08-04 Scientific-Atlanta, Inc. Testing facility for a broadband communications system
US6795580B1 (en) * 1998-09-10 2004-09-21 Tektronix, Inc. Picture quality measurement using blockiness
JP2000269745A (ja) * 1999-03-18 2000-09-29 Ando Electric Co Ltd 雑音発生装置
US7216811B2 (en) * 2004-04-16 2007-05-15 Microscan Systems Incorporated Barcode scanner with linear automatic gain control (AGC), modulation transfer function detector, and selectable noise filter
DE602007008695D1 (de) * 2006-02-02 2010-10-07 Thomson Licensing Verfahren und vorrichtung zur erkennung und verhinderung von nebensprechen in einem multibandempfänger

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316821A1 (fr) * 1975-06-20 1977-01-28 Dynamic Technology Ltd Dispositif de television pour la radiodiffusion d'informations simultanement avec des programmes de television, mais independamment de ces programmes

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US3278676A (en) * 1958-05-07 1966-10-11 Precon Process And Equipment C Apparatus for producing visual and auditory stimulation
US2987586A (en) * 1958-09-30 1961-06-06 Bell Telephone Labor Inc Cross-modulation measuring system
US3715508A (en) * 1967-09-15 1973-02-06 Ibm Switching circuits employing orthogonal and quasi-orthogonal pseudo-random code sequences
US3720789A (en) * 1969-07-28 1973-03-13 Plessey Telecommunications Res Electrical signalling systems using correlation detectors
US3735266A (en) * 1971-12-20 1973-05-22 Bell Telephone Labor Inc Method and apparatus for reducing crosstalk on cross-polarized communication links
US3891805A (en) * 1973-11-21 1975-06-24 James Loton Flanagan Digital signal detection in telephonic communication systems
SE393236B (sv) * 1975-08-15 1977-05-02 Ericsson Telefon Ab L M Forfarande for samtidig alstring av ett antal, svagt korrelerade pseudo-random pulstag samt anordning for utforande av forfarandet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316821A1 (fr) * 1975-06-20 1977-01-28 Dynamic Technology Ltd Dispositif de television pour la radiodiffusion d'informations simultanement avec des programmes de television, mais independamment de ces programmes

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
EXBK/ *
EXBK/72 *
EXBK/75 *
EXBK/78 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3020921A1 (de) * 1980-06-03 1981-12-10 Robert Bosch Gmbh, 7000 Stuttgart System zur kontrolle von digitalen videosignalen

Also Published As

Publication number Publication date
GB1575098A (en) 1980-09-17
BE868087A (fr) 1978-10-02
ZA78284B (en) 1979-06-27
ES470838A1 (es) 1979-09-01
NL7806485A (nl) 1978-12-19
AU3710978A (en) 1979-12-20
CA1135831A (fr) 1982-11-16
US4246608A (en) 1981-01-20
JPS5417617A (en) 1979-02-09
SE7806839L (sv) 1978-12-16
CH642501A5 (de) 1984-04-13
DE2825282A1 (de) 1978-12-21
AU517346B2 (en) 1981-07-23

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