DE753763C - Method for scanning optical sound recordings - Google Patents

Method for scanning optical sound recordings

Info

Publication number
DE753763C
DE753763C DEU13791D DEU0013791D DE753763C DE 753763 C DE753763 C DE 753763C DE U13791 D DEU13791 D DE U13791D DE U0013791 D DEU0013791 D DE U0013791D DE 753763 C DE753763 C DE 753763C
Authority
DE
Germany
Prior art keywords
soundtrack
scanning optical
sound recordings
optical sound
scanning
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
Application number
DEU13791D
Other languages
German (de)
Inventor
Heinz Orlich
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.)
Universum Film AG
Original Assignee
Universum Film AG
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 Universum Film AG filed Critical Universum Film AG
Priority to DEU13791D priority Critical patent/DE753763C/en
Application granted granted Critical
Publication of DE753763C publication Critical patent/DE753763C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor

Description

Die Erfindung betrifft ein Verfahren zum Abtasten von Lichttonaufzeichnungen in Wellenschrift. Man hat sich bei solchen Verfahren bereits einer in den Abtaststrahlengang eingeschalteten Blende bedient, durch die ein Teil der Wellenschrifttonspur abgedeckt wird.The invention relates to a method for scanning optical sound recordings in Wavy font. With such a method, one already has one in the scanning beam path switched on aperture, through which part of the wave writing soundtrack is covered will.

Neu und Gegenstand der Erfindung ist jedoch, durch diese Blende einen gleichmäßigWhat is new and the subject of the invention, however, is that this aperture makes one evenly

ίο breiten Mittelstreifen der Tonspur derart abzudecken, daß von jeder Berandungskurve nur die nach außen weisenden Halbwellen abgetastet werden. Der Fortschritt dieses Verfahrens besteht darin, daß bei der Wiedergäbe einer solchen Tonaufzeichnung alle Vorteile einer sogenannten Halbwellenschrift (keine Nebengeräusche, großer LautStärkenumfang) erhalten werden, ohne daß man die schwierige Aufnahme einer Halbwellenschrift auszuführen hat.ίο wide median of the soundtrack like that to cover that of each boundary curve only the half-waves pointing outwards are scanned. The advance of this process is that when reproducing such a sound recording all the advantages of a so-called half-wave writing (no background noise, large volume range) can be obtained without having to carry out the difficult recording of half-wave writing.

Es ist bekannt, daß diese Tonaufzeichnungen in Wellenschrift nicht ohne weiteres zur Wiedergabe geeignet sind, da durch die Verschiebung des von parallelen Linien begrenzten Bandes keine Änderung im Verhältnis des geschwärzten Filmteiles zum blanken Filmteil besteht, so daß der Abtastlichtstrahl nicht moduliert wird. Es ist deshalb vorgeschlagen worden, bei der Abtastung eine Hälfte der Tonspur abzudecken, so daß man eine normale Zackenschrift erhält, wo der Anteil der Schwärzung entsprechend derIt is known that these sound recordings in wave writing are not easily used Playback are suitable because limited by the displacement of parallel lines Tape there is no change in the ratio of the blackened film part to the bare film part, so that the scanning light beam is not modulated. It has therefore been proposed to use a Cover half of the soundtrack, so that you get a normal serrated font where the Proportion of blackening according to the

Tonschwingung schwankt. Es ist ferner vorgeschlagen worden, die beiden Tonspurhälften mit zwei im Gegentakt geschalteten Photozellen abzutasten. Bei dieser Art der Abtastung erhält man aber nicht die einer Halbwellenschrift eigentümlichen Vorteile.Sound vibration fluctuates. It has also been proposed to use the two halves of the soundtrack to be scanned with two photocells switched in push-pull. With this type of scanning, however, one does not get the one Half-wave font peculiar advantages.

Zur Ausführung des neuen Verfahrens sind zwei Möglichkeiten gegeben. Diese bestehen darin, daß entweder der Mittelstreifen derThere are two options for carrying out the new method. These exist in that either the median of the

ίο Tonspur beim Abtasten durch eine in den Abtaststrahlengang eingeschaltete Blende im Tonspalt abgedeckt wird, oder daß der Mittelstreifen der Tonspur bereits auf der wiederzugebenden Tonspur abgedeckt ist, so daß eine zusätzliche Blende im Tonspalt überflüssig ist. Die zur Abtastung dienenden Photozellen können nach einer der bekannten Schaltungen im Gegentakt geschaltet sein.ίο sound track when scanning through a into the Scanning beam path switched on aperture is covered in the sound gap, or that the median strip the sound track is already covered on the sound track to be played back, so that an additional screen in the sound gap is superfluous is. The photocells used for scanning can be connected in push-pull using one of the known circuits.

Claims (1)

Patentanspruch:Claim: Verfahren zum Abtasten von Lichttonaufzeichnungen in Wellenschrift mittels einer in den Abtaststrahlengang eingeschalteten Blende, durch die ein Teil der Wellenschrifttonspur abgedeckt wird, dadurch gekennzeichnet, daß durch die Blende ein gleichmäßig breiter Mittelstreifen der Tonspur derart abgedeckt wird, daß von jeder Berandungskurve nur die nach außen weisenden Halbwellen abgetastet werden.Method for scanning optical sound recordings in wavy writing by means of an aperture switched into the scanning beam path through which part of the Wave writing soundtrack is covered, characterized in that by the Cover an evenly wide median of the soundtrack in this way becomes that of each boundary curve only the half-waves pointing outwards are scanned. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik sind.im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden:To distinguish the subject matter of the invention from the state of the art, are in the granting procedure the following publications have been considered: Deutsche Patentschriften Nr. 246 184,German patent specification No. 246 184, 635418;
französische Patentschriften Nr. 691 131, 733 365,745 58ο;635418;
French patents nos. 691 131, 733 365,745 58ο; britische Patentschriften Nr. 322 796,British Patent Specification No. 322,796, 388373, 389391,406872;
USA.-Patentschriften Nr. 2 025 608,
2 093 423.388373, 389391, 406872;
U.S. Patent No. 2,025,608,
2,093,423. © 9516 4.54© 9516 4.54
DEU13791D 1937-04-09 1937-04-09 Method for scanning optical sound recordings Expired DE753763C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEU13791D DE753763C (en) 1937-04-09 1937-04-09 Method for scanning optical sound recordings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEU13791D DE753763C (en) 1937-04-09 1937-04-09 Method for scanning optical sound recordings

Publications (1)

Publication Number Publication Date
DE753763C true DE753763C (en) 1954-04-29

Family

ID=7568427

Family Applications (1)

Application Number Title Priority Date Filing Date
DEU13791D Expired DE753763C (en) 1937-04-09 1937-04-09 Method for scanning optical sound recordings

Country Status (1)

Country Link
DE (1) DE753763C (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246184C (en) *
GB322796A (en) * 1928-06-06 1929-12-06 John Neale Improved means and methods for recording and reproducing sound
FR691131A (en) * 1929-05-10 1930-10-01 Fr Cinechromatique Procedes R Method and devices for obtaining films or other sound surfaces
FR733365A (en) * 1931-06-01 1932-10-05 Etude Pour L Expl Des Brevets Method and apparatus for recording and reproducing mechanical vibrations and in particular sounds, and new industrial product resulting therefrom
GB388373A (en) * 1931-08-17 1933-02-17 Rene Leon Adolphe Nublat Improved method for reproducing mechanical vibrations and particularly sounds
GB389391A (en) * 1931-08-21 1933-03-16 Friess Ag Fuer Film Und Tonger An improved method of and apparatus for the photographic recording of sounds
FR745580A (en) * 1933-05-12
GB406872A (en) * 1932-05-09 1934-03-08 Rca Corp Method and apparatus for sound recording and reproducing
US2025608A (en) * 1931-06-01 1935-12-24 Sarl Soc D Etudes Pour L Expl Method and apparatus for recording and reproducing mechanical vibrations
DE635418C (en) * 1932-07-21 1936-09-17 James Arthur Miller Method for producing an optically reproduced vibration recording, in particular a sound recording
US2093423A (en) * 1932-05-09 1937-09-21 Rca Corp Sound recording and reproducing apparatus

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246184C (en) *
FR745580A (en) * 1933-05-12
GB322796A (en) * 1928-06-06 1929-12-06 John Neale Improved means and methods for recording and reproducing sound
FR691131A (en) * 1929-05-10 1930-10-01 Fr Cinechromatique Procedes R Method and devices for obtaining films or other sound surfaces
FR733365A (en) * 1931-06-01 1932-10-05 Etude Pour L Expl Des Brevets Method and apparatus for recording and reproducing mechanical vibrations and in particular sounds, and new industrial product resulting therefrom
US2025608A (en) * 1931-06-01 1935-12-24 Sarl Soc D Etudes Pour L Expl Method and apparatus for recording and reproducing mechanical vibrations
GB388373A (en) * 1931-08-17 1933-02-17 Rene Leon Adolphe Nublat Improved method for reproducing mechanical vibrations and particularly sounds
GB389391A (en) * 1931-08-21 1933-03-16 Friess Ag Fuer Film Und Tonger An improved method of and apparatus for the photographic recording of sounds
GB406872A (en) * 1932-05-09 1934-03-08 Rca Corp Method and apparatus for sound recording and reproducing
US2093423A (en) * 1932-05-09 1937-09-21 Rca Corp Sound recording and reproducing apparatus
DE635418C (en) * 1932-07-21 1936-09-17 James Arthur Miller Method for producing an optically reproduced vibration recording, in particular a sound recording

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