FR838794A - Method of reproducing sound recordings in several curves - Google Patents

Method of reproducing sound recordings in several curves

Info

Publication number
FR838794A
FR838794A FR838794DA FR838794A FR 838794 A FR838794 A FR 838794A FR 838794D A FR838794D A FR 838794DA FR 838794 A FR838794 A FR 838794A
Authority
FR
France
Prior art keywords
reproducing sound
sound recordings
several curves
curves
several
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
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR838794A publication Critical patent/FR838794A/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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/02—Analogue recording or reproducing
    • G11B20/04—Direct recording or reproducing
    • 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
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
FR838794D 1937-06-03 1938-06-02 Method of reproducing sound recordings in several curves Expired FR838794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE838794X 1937-06-03

Publications (1)

Publication Number Publication Date
FR838794A true FR838794A (en) 1939-03-15

Family

ID=6761747

Family Applications (1)

Application Number Title Priority Date Filing Date
FR838794D Expired FR838794A (en) 1937-06-03 1938-06-02 Method of reproducing sound recordings in several curves

Country Status (2)

Country Link
BE (1) BE428377A (en)
FR (1) FR838794A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119829A2 (en) * 1983-03-14 1984-09-26 Dolby Laboratories Licensing Corporation Improvements in apparatus for reproducing motion picture film photographic sound-tracks
EP0259505A1 (en) * 1986-08-27 1988-03-16 ANSCHÜTZ & CO. GmbH Optical transducer for stereo optical soundtrack in cinematographic films

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119829A2 (en) * 1983-03-14 1984-09-26 Dolby Laboratories Licensing Corporation Improvements in apparatus for reproducing motion picture film photographic sound-tracks
EP0119829A3 (en) * 1983-03-14 1986-09-03 Dolby Laboratories Licensing Corporation Improvements in apparatus for reproducing motion picture film photographic sound-tracks
EP0259505A1 (en) * 1986-08-27 1988-03-16 ANSCHÜTZ & CO. GmbH Optical transducer for stereo optical soundtrack in cinematographic films

Also Published As

Publication number Publication date
BE428377A (en)

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