DE3406143A1 - Noise pulse gating for control devices for film, transparency and video sound dubbing - Google Patents

Noise pulse gating for control devices for film, transparency and video sound dubbing

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Publication number
DE3406143A1
DE3406143A1 DE19843406143 DE3406143A DE3406143A1 DE 3406143 A1 DE3406143 A1 DE 3406143A1 DE 19843406143 DE19843406143 DE 19843406143 DE 3406143 A DE3406143 A DE 3406143A DE 3406143 A1 DE3406143 A1 DE 3406143A1
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DE
Germany
Prior art keywords
pulse
film
transparency
control devices
noise pulse
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
DE19843406143
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German (de)
Other versions
DE3406143C2 (en
Inventor
Günter Ing.(grad.) 8500 Nürnberg Gebuhr
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19843406143 priority Critical patent/DE3406143C2/en
Publication of DE3406143A1 publication Critical patent/DE3406143A1/en
Application granted granted Critical
Publication of DE3406143C2 publication Critical patent/DE3406143C2/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
    • G03B31/04—Associated working of cameras or projectors with sound-recording or sound-reproducing means in which sound track is not on, but is synchronised with, a moving-picture film

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

Published without abstract.

Description

Si;örimpulsaustastung für Steuergeräte zurSi; örimpulsausastung for control units for

Film-, Dia- und Videovertonung Stand der Technik Seit mehreren Jahrzehnten werden Synchronimpulse zur Film synchronisation und zur DIA-Steuerung eingesetzt. Diese Signale, die vorwiegend auf einem Magnetband aufgezeichnet sind, sind jedoch wie alle anderen Steuersignale auch Störungen ausgesetzt. Deshalb versucht man von Anfang an, möglichst störsichere Geräte zu bauen. Dabei wurde in erster Linie ein möglichst optimal abgestimmter Impulsverstärker verwendet. Diese Verstärker verfügen meistens über eine Einrichtung zum Ableiten einer eventuell vom Magnetbandgerät kommenden Hochfrequenzstrahlung und über eine minimale Pegelschwelle, die überschritten werden muß, um einen Schaltvorgang auszulösen. In Ausnahmefällen wird auch ein selektiver Verstärker verwendet.Film, slide and video recording State of the art For several decades Synchronization pulses are used for film synchronization and DIA control. However, these signals, which are mainly recorded on magnetic tape, are like all other control signals also exposed to interference. Therefore one tries from Start with building devices that are as immune to interference as possible. It was primarily a Optimally matched pulse amplifier used. These amplifiers feature mostly via a device for deriving a possibly from the magnetic tape recorder coming high frequency radiation and above a minimum level threshold that is exceeded must be in order to trigger a switching process. In exceptional cases, a more selective one is also used Amplifier used.

Eine Besonderheit in diesem Zusammenhang ist die Impulskorrektureinrichtung wie Sie in der Anmeldung CH 466 700 beschrieben wird. Diese Schaltung ergänzt erstmals Impulslücken in einer Synchronimpulsreihe.A special feature in this context is the pulse correction device as described in the application CH 466 700. This circuit supplements for the first time Pulse gaps in a sync pulse series.

Dies geschieht dadurch, daß die Zeit zwischen zwei Impulsen gemessen wird und ein Korrekturimpuls eingefügt wird, wenn kein Impuls rechtzeitig eintrifft. Alle diese bekannten Maßnahmen sind jedoch nicht in der Lage eine wirksame Störimpulsabtastung zu erreichen.This is done by measuring the time between two pulses and a correction pulse is inserted if no pulse arrives in time. However, all of these known measures are incapable of effective interfering pulse sampling to reach.

Beschreibung der Anmeldung Die beschriebene Störimpulsaustastung wird in einem Synchronsteuergerät für die Film- und Video-Synchronisation eingesetzt. Wie die meisten Synchronsysteme für Film amateure wird auch bei. diesem Gerät mit 1000Hz-Impulsen nach DIN 15970 gearbeitet.Description of the application The interference suppression described is used in a synchronous control device for film and video synchronization. Like most sync systems for film amateurs will also be at. this device worked with 1000 Hz pulses according to DIN 15970.

Diese Impulse hahen irnmer eine Mindestimpulsdauer die größer als 15 5 ms ist Eine spezielle zusätzliche Einrichtung, die dem Imp-tilsverstärker nachgeordnet ist mißt nun die Zeit vom Beginn des Impulses ausgehend. Steht nach typ, 8 ms der Impuls immer noch an, so kann davon ausgegangen werden daß es sich tatsächlich um einen Synchronsteuerimpuls handelt. Auf diese Art ist es möglich Störimpulse, die von statischer Aufladung der von "Schaltknacksern" herrühren auf sehr wirksame Weise auszutasten. Dies bedeutet in der Praxis, daß über 90% der auftretenen Störimpulse unwirksam gemacht werden! Als weitere Besonderheit verfügt das neue Synchronsteuergerät über eine weitere Impulsaustastung, die die beschriebene Störimpulsaustastung wirkungsvoll ergänzt. Nach jedem erkannten Synchronsteuerimpuls kann davon ausgegangen werden, daß für die Zeit: 1 Periodendauer = max. Synchronimpulsolgefrequenz kein weiterer Synchronsteuerimpuls mehr eintreffen kann. Für diese Periodendauer (typ. 25 ms> wird nun der entsprechende Impulseingang des Steuergerätes gesperrt und somit die Störimpulssicherheit weiter erhöht.These pulses always have a minimum pulse duration greater than 15 5 ms is a special additional device that is arranged downstream of the pulse amplifier is now measures the time from the beginning of the impulse. Is available after typ. 8 ms the Impulse is still on, so it can be assumed that it is actually acts a synchronous control pulse. In this way it is possible for glitches from static electricity from "gear clickers" in a very effective way to feel. In practice, this means that over 90% of the interference pulses that occur be made ineffective! Another special feature is the new synchronous control unit via a further pulse blanking that effectively eliminates the interference pulse described added. After each recognized synchronous control pulse it can be assumed that that for the time: 1 period = max Synchronous control pulse can arrive more. For this period (typ. 25 ms> the corresponding pulse input of the control unit is now blocked and thus the Interference security further increased.

Beide Arten der Störimpulsaustastung sind zudem auch in den Anlauf- und Stop Phasen des Magnetbandes weiter wirksam, wenn der Impulsverstärker auf dem Stand der Technik ist.Both types of interference suppression are also available in the start-up and stop phases of the magnetic tape continue to be effective when the pulse amplifier is on State of the art.

Prinzipiell wäre es außerdem möglich, mit dem Einsatz eines Mikroprozessors die genannten Zeiten für die Störimpulsaustastung; ausgehend von der Synchronimpulsdauer und der Synchronimpulsfolgefrequenz jeweils entsprechend zu optimieren und gegehenenfalls dynamisch nachzuführen. In der Praxis jedoch ist diesbisher nicht sinnvoll weil die beschriebene Störimpulsaustastung die Anzahl der noch verbliebenen Störimpulse auf wenige Ausnahmen reduziert.In principle it would also be possible with the use of a microprocessor the times mentioned for the glitch blanking; based on the sync pulse duration and to optimize the sync pulse repetition frequency accordingly and if necessary to track dynamically. In practice, however, this has not yet made sense because the interference pulse blanking described, the number of interference pulses still remaining reduced to a few exceptions.

Claims (2)

Patentansprüche: 1) Steuergerät zur Film-, Dia- und Video-Synchronisation, dadurch gekennzeichnet, daß es die Impulsbreite der eingehenden Steuerimpulse überwacht und nur Impulse mit einer über eine minimale Impulslänge hinausgehenden Impulsdauer als Steuerimpuls verwendet.Claims: 1) Control unit for film, slide and video synchronization, characterized in that it monitors the pulse width of the incoming control pulses and only pulses with a pulse duration exceeding a minimum pulse length used as a control pulse. 2) Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß für die Periodendauer der max. Synchronimpulsfolgefrequenz der entsprechende Impulseingang des Steuergerätes gesperrt werden kann.2) Device according to claim 1, characterized in that for the Period duration of the maximum sync pulse repetition frequency of the corresponding pulse input the control unit can be blocked.
DE19843406143 1984-02-21 1984-02-21 Device for ensuring the synchronous control of an image reproduction device from a continuously running sound carrier or, conversely, a sound reproduction device from a continuously running image carrier Expired DE3406143C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843406143 DE3406143C2 (en) 1984-02-21 1984-02-21 Device for ensuring the synchronous control of an image reproduction device from a continuously running sound carrier or, conversely, a sound reproduction device from a continuously running image carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843406143 DE3406143C2 (en) 1984-02-21 1984-02-21 Device for ensuring the synchronous control of an image reproduction device from a continuously running sound carrier or, conversely, a sound reproduction device from a continuously running image carrier

Publications (2)

Publication Number Publication Date
DE3406143A1 true DE3406143A1 (en) 1985-08-29
DE3406143C2 DE3406143C2 (en) 1986-10-02

Family

ID=6228319

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843406143 Expired DE3406143C2 (en) 1984-02-21 1984-02-21 Device for ensuring the synchronous control of an image reproduction device from a continuously running sound carrier or, conversely, a sound reproduction device from a continuously running image carrier

Country Status (1)

Country Link
DE (1) DE3406143C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815013A (en) * 1987-07-30 1989-03-21 Universal Recording Corporation Variable speed film transport interlock system and method using same
US4933881A (en) * 1987-07-30 1990-06-12 Universal Recording Corporation Variable speed film transport interlock system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT296026B (en) * 1967-11-20 1972-01-25 Bell & Howell Co Device for scanning control marks
DE2415365C3 (en) * 1974-03-29 1983-12-08 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for masking out pulses whose duration is shorter than a predetermined test duration tp from a sequence of digital pulses present on the input side

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT296026B (en) * 1967-11-20 1972-01-25 Bell & Howell Co Device for scanning control marks
DE2415365C3 (en) * 1974-03-29 1983-12-08 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for masking out pulses whose duration is shorter than a predetermined test duration tp from a sequence of digital pulses present on the input side

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815013A (en) * 1987-07-30 1989-03-21 Universal Recording Corporation Variable speed film transport interlock system and method using same
US4933881A (en) * 1987-07-30 1990-06-12 Universal Recording Corporation Variable speed film transport interlock system

Also Published As

Publication number Publication date
DE3406143C2 (en) 1986-10-02

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D2 Grant after examination
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8331 Complete revocation