FR2289933A1 - Cine projector with sound track reproduction unit - uses two audio tracks one used to control intensity of other - Google Patents

Cine projector with sound track reproduction unit - uses two audio tracks one used to control intensity of other

Info

Publication number
FR2289933A1
FR2289933A1 FR7533725A FR7533725A FR2289933A1 FR 2289933 A1 FR2289933 A1 FR 2289933A1 FR 7533725 A FR7533725 A FR 7533725A FR 7533725 A FR7533725 A FR 7533725A FR 2289933 A1 FR2289933 A1 FR 2289933A1
Authority
FR
France
Prior art keywords
track
signals
sound track
audio
reproduction unit
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
FR7533725A
Other languages
French (fr)
Other versions
FR2289933B3 (en
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.)
PLANK KG FABRIK OPTISCHER PRAZ
Original Assignee
PLANK KG FABRIK OPTISCHER PRAZ
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
Priority claimed from AT870074A external-priority patent/ATA870074A/en
Application filed by PLANK KG FABRIK OPTISCHER PRAZ filed Critical PLANK KG FABRIK OPTISCHER PRAZ
Publication of FR2289933A1 publication Critical patent/FR2289933A1/en
Application granted granted Critical
Publication of FR2289933B3 publication Critical patent/FR2289933B3/fr
Granted legal-status Critical Current

Links

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
    • G03B31/02—Associated working of cameras or projectors with sound-recording or sound-reproducing means in which sound track is on a moving-picture film

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

The cine projector has a sound track unit, containing a first audio track and a second synchronised audio track, with means for amplifying the audio signals recorded along each track, the intensity of the signals for one track being reduced via the signals for the second track. The intensity of the acoustic signals for the first track are reduced by control signals recorded along the second track as control audio signals only, or in addition to acoustic signals recorded along the second track. The frequency of the control audio signals lies outside the acoustic transmission range employed for the sound track.
FR7533725A 1974-10-29 1975-10-28 Cine projector with sound track reproduction unit - uses two audio tracks one used to control intensity of other Granted FR2289933A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT870074A ATA870074A (en) 1973-10-30 1974-10-29 SOUND PROJECTOR

Publications (2)

Publication Number Publication Date
FR2289933A1 true FR2289933A1 (en) 1976-05-28
FR2289933B3 FR2289933B3 (en) 1978-10-13

Family

ID=3607807

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7533725A Granted FR2289933A1 (en) 1974-10-29 1975-10-28 Cine projector with sound track reproduction unit - uses two audio tracks one used to control intensity of other

Country Status (1)

Country Link
FR (1) FR2289933A1 (en)

Also Published As

Publication number Publication date
FR2289933B3 (en) 1978-10-13

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Legal Events

Date Code Title Description
ST Notification of lapse