DE900144C - Amplitude-controlled sound recording - Google Patents

Amplitude-controlled sound recording

Info

Publication number
DE900144C
DE900144C DES5356D DES0005356D DE900144C DE 900144 C DE900144 C DE 900144C DE S5356 D DES5356 D DE S5356D DE S0005356 D DES0005356 D DE S0005356D DE 900144 C DE900144 C DE 900144C
Authority
DE
Germany
Prior art keywords
sound recording
amplitude
recording
controlled sound
sound
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
DES5356D
Other languages
German (de)
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DES5356D priority Critical patent/DE900144C/en
Application granted granted Critical
Publication of DE900144C publication Critical patent/DE900144C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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

Landscapes

  • Holo Graphy (AREA)

Description

Amplitudengeregelte Tonaufzeichnung Zusatz zum Patent 883'9!&3 Im Patent 883 963 wird ein Verfahren zur Herstellung von Tonfilmen beschrieben, bei dem. die Regleraufzeichnung amplitudengeregelter Tonfilme auf demselben Streifen hergestellt wird' wie die Tonaufzeichnung. Dabei wird z. B. die in Dichteschrift oder in mehreren nebeneinanderliegenden schahlonenförmigen Aufzeichnungen hergestellte Tonaufzeichnung mehr oder weniger von der Regleraufzeichnung verdeckt, so daß diese Aufzeichnung nicht nur zur Beeinflussung des Amplitudenreglers im Wiedergabeapparat dient, sondern auch an den Piano-stellen denjenigen Teil der Aufzeichnung verringert, auf dem sich hauptsächlich durch Kratzer oder Verschmutzung entstehende Verzerrungen bemerkbar machen.Amplitude-controlled sound recording Addendum to patent 883'9! & 3 Patent 883,963 describes a process for producing sound films, in which. the regulator recording of amplitude regulated sound films on the same strip is produced 'like the sound recording. It is z. B. the one in density writing or produced in several adjacent schahlon-shaped records Sound recording more or less obscured by the controller recording, so that this Recording not only to influence the amplitude regulator in the playback device serves, but also reduces that part of the recording at the piano points, on which there is distortion mainly caused by scratches or dirt to make noticable.

Es wurde bereits im Patent 8839613 darauf hingewiesen, daß die Wiedergabe derartiger Filme nur mit solchen Projektionsapparaten möglich ist, die eine Rückregelung .der Lautstärke bewirken. Zur Vermeidung einer kostspieligen Rückregelungsapparatur wurde vorgeschlagen, vor dem Wiedergabespalt einen Graukeil oder ein entsprechendes optisches Hilfsmittel anzubringen, welches. bis zu einem gewissen Grade imstande ist, eine naturgetreue Rückregelung zu bewirken. Zur Vermeidung der nichtlinearen Verzerrungen, die sich jedoch bei diesem Verfahren nur schwer vermeiden lassen, wird gemäß der Erfindung die Tonaufzeichnung in der Weise hergestellt, daß die Regleraufzeichnung einen .so großen Teil von ihr abdeckt, -daß der verbleibende Teil der Tonaufzeichnung. bei Wiedergabe mit einem Apparat ohne Rückregelung der Lautstärke die richtige Lautstärke liefert.It was already pointed out in patent 8839613 that the reproduction Such films are only possible with projectors that have a back regulation .the volume. To avoid costly back regulation equipment it was suggested that a gray wedge or equivalent should be placed in front of the display gap to attach optical aid, which. Capable to a certain extent is to bring about a lifelike regulation. To avoid the non-linear Distortions, however, when Difficult to avoid this procedure let, according to the invention, the sound recording is produced in such a way that the controller record covers so much of it that the remaining one Part of the sound recording. when playing with a device without back regulation of the Volume delivers the correct volume.

Zur Herstellung derartiger Tonaufzeichnungen können dieselben Einrichtungen zsur Anwendung gelangen, die im Patent 883963 beschrieben wurden, und auch das neue Verfahren zeichnet sich .durch die schon dort angegebenen Vorzüge aus. Gegenüber dem bekannten Tonaufzeichnungsverfahren mit Amplitudenregelung, bei denen die Filme ohne Rückregelung wiedergegeben werden können, weist es den Vorteil größter Einfachheit in der Herstellung .der Aufzeichnung auf. Diese kann z. B. in der Weise hergestellt werden, daß ein die Regleraufzeichnung bewirkender Lichtspalt einen verschieden breiten Streifen der Tonaufzeichnung belichtet und auf dieser dä;durch alle die Tonaufzeichnung .darstellenden Kontraste überdeckt. Während z. B. bei dem bekannten oder früher vorgeschlagenen, demselben Zweck dienenden Verfahren eine nachträgliche Korrektur der Regleraufzeichnung kaum möglich war, kann diese bei dem neuen Verfahren dadurch in einfacher Weise vorgenommen werden, daß der abgedeckte Streifen verbreitert oder verringert wird.For the production of such sound recordings, the same devices can be used that were described in patent 883963, and the new method is also characterized by the advantages already indicated there. Compared to the known sound recording method with amplitude control, in which the films can be played back without back control, it has the advantage of great simplicity in production. This can e.g. B. be produced in such a way that a slit causing the controller recording exposes a strip of different widths of the sound recording and on this da; covered by all the sound recording .darstellenden contrasts. While z. If, for example, a subsequent correction of the controller recording was hardly possible in the known or previously proposed method serving the same purpose, this can be done in the new method in a simple manner that the covered strip is widened or reduced.

Claims (1)

PATENTANSPRUCH: Amplitudengeregelte Tonaufzeichnung nach Patent 883 963, dadurch gekennzeichnet, daß ,durch,die R@eglerau.fz,eichnung ein so großer Teil der Tonaufzeichnung abgedeckt ist, daß die Lautstärke für Wiedergabe ohne Rückregelung richtig aufgezeichnet ist. Angezogene Druckschriften: Französische Patentschrift Nr. 68.5 341 .PATENT CLAIM: Amplitude-controlled sound recording according to patent 883 963, characterized in that, by, the R @ eglerau.fz, drawing such a large Part of the sound recording is that the volume is covered for playback without turning down is recorded correctly. Reference documents: French patent specification No. 68.5 341.
DES5356D 1931-04-09 1931-04-09 Amplitude-controlled sound recording Expired DE900144C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES5356D DE900144C (en) 1931-04-09 1931-04-09 Amplitude-controlled sound recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES5356D DE900144C (en) 1931-04-09 1931-04-09 Amplitude-controlled sound recording

Publications (1)

Publication Number Publication Date
DE900144C true DE900144C (en) 1953-12-21

Family

ID=7471327

Family Applications (1)

Application Number Title Priority Date Filing Date
DES5356D Expired DE900144C (en) 1931-04-09 1931-04-09 Amplitude-controlled sound recording

Country Status (1)

Country Link
DE (1) DE900144C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR685341A (en) * 1928-11-23 1930-07-09 Westinghouse Electric & Mfg Co Improvements to sound recording and reproducing systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR685341A (en) * 1928-11-23 1930-07-09 Westinghouse Electric & Mfg Co Improvements to sound recording and reproducing systems

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