BE447615A - - Google Patents

Info

Publication number
BE447615A
BE447615A BE447615DA BE447615A BE 447615 A BE447615 A BE 447615A BE 447615D A BE447615D A BE 447615DA BE 447615 A BE447615 A BE 447615A
Authority
BE
Belgium
Application number
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.)
Publication of BE447615A publication Critical patent/BE447615A/xx

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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/38—Arrangements for displaying electric variables or waveforms using the steady or oscillatory displacement of a light beam by an electromechanical measuring system
    • 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
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
    • G11B7/0032—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent for moving-picture soundtracks, i.e. cinema

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
BE447615D 1941-08-30 BE447615A (en:Method)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2485829X 1941-08-30
NL885556X 1941-08-30

Publications (1)

Publication Number Publication Date
BE447615A true BE447615A (en:Method)

Family

ID=26646467

Family Applications (1)

Application Number Title Priority Date Filing Date
BE447615D BE447615A (en:Method) 1941-08-30

Country Status (2)

Country Link
US (1) US2485829A (en:Method)
BE (1) BE447615A (en:Method)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605162A (en) * 1949-07-27 1952-07-29 John F Gantt Film opaquing device and process
US2681382A (en) * 1950-08-11 1954-06-15 Earl D Hilburn Video recording and reproducing
US3187114A (en) * 1958-08-14 1965-06-01 Raymond R Mcdaniel Recording and reproduction of intelligence signals
US3975598A (en) * 1973-05-17 1976-08-17 Westinghouse Electric Corporation Random-access spoken word electron beam digitally addressable memory
GB1525691A (en) * 1974-08-27 1978-09-20 Dolby Laboratories Inc Reproduction of optical sound tracks
US4223188A (en) * 1977-03-18 1980-09-16 Dolby Laboratories, Inc. Scanning system for reproduction of optical sound tracks with clear area noise discriminator delay means
US4184055A (en) * 1977-03-18 1980-01-15 Dolby Laboratories, Inc. Scanning system for reproduction of optical sound tracks with clear area noise discriminator delay means
US4596008A (en) * 1983-08-25 1986-06-17 Beard Terry D Optical sound track playback apparatus and method
US5237559A (en) * 1991-09-05 1993-08-17 Dolby Laboratories Licensing Corporation Reproduction of sound track signals by varying the detector threshold level as a function of the transverse scan position
JPH06332084A (ja) * 1993-05-25 1994-12-02 Sony Corp 映画フィルム用ディジタル情報再生装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251332A (en) * 1938-03-31 1941-08-05 Bell Telephone Labor Inc Cathode ray device
US2347084A (en) * 1942-09-15 1944-04-18 Rca Corp Noiseless sound system

Also Published As

Publication number Publication date
US2485829A (en) 1949-10-25

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