CA1124402A - Apparatus for scanning variable area optical sound tracks - Google Patents

Apparatus for scanning variable area optical sound tracks

Info

Publication number
CA1124402A
CA1124402A CA304,524A CA304524A CA1124402A CA 1124402 A CA1124402 A CA 1124402A CA 304524 A CA304524 A CA 304524A CA 1124402 A CA1124402 A CA 1124402A
Authority
CA
Canada
Prior art keywords
sound track
signal
noise
optical sound
optical
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
CA304,524A
Other languages
English (en)
French (fr)
Inventor
Ray M. Dolby
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.)
Dolby Laboratories Licensing Corp
Original Assignee
Dolby Laboratories Licensing Corp
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 Dolby Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Application granted granted Critical
Publication of CA1124402A publication Critical patent/CA1124402A/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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/024—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of diode-array scanning
    • 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
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
CA304,524A 1977-06-03 1978-05-31 Apparatus for scanning variable area optical sound tracks Expired CA1124402A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80304277A 1977-06-03 1977-06-03
US803,042 1985-11-29

Publications (1)

Publication Number Publication Date
CA1124402A true CA1124402A (en) 1982-05-25

Family

ID=25185428

Family Applications (1)

Application Number Title Priority Date Filing Date
CA304,524A Expired CA1124402A (en) 1977-06-03 1978-05-31 Apparatus for scanning variable area optical sound tracks

Country Status (7)

Country Link
JP (1) JPS542703A (enrdf_load_stackoverflow)
CA (1) CA1124402A (enrdf_load_stackoverflow)
DE (1) DE2823853A1 (enrdf_load_stackoverflow)
FR (1) FR2393342A1 (enrdf_load_stackoverflow)
GB (1) GB1598113A (enrdf_load_stackoverflow)
IT (1) IT1192315B (enrdf_load_stackoverflow)
NL (1) NL189322C (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577305A (en) * 1983-03-14 1986-03-18 Dolby Laboratories Licensing Corporation Stereophonic motion picture photographic sound-tracks compatible with different sound projection formats and record and playback apparatus therefore
AU2002214955A1 (en) * 2000-09-11 2002-03-22 Bts Holding International B.V. Device and method for reproducing photographic sound recordings

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR885556A (fr) * 1941-08-30 1943-09-20 Philips Nv Procédé pour l'exploration électro-optique d'enregistrements d'oscillations
BE789499A (fr) * 1971-09-30 1973-01-15 Siemens Ag Procede pour enregistrer de facon sequentielle des donnees analogiques sur une bande de memorisation
US3848095A (en) * 1972-12-20 1974-11-12 I O Metrics Corp Three dimensional electro-optical retrieval system
US3959784A (en) * 1974-12-23 1976-05-25 Actron High speed optical read-out of data stored in an array
DE2543276A1 (de) * 1975-09-27 1977-03-31 Licentia Gmbh Wiedergabesystem fuer auf einem bandfoermigen traeger aufgezeichnete informationen

Also Published As

Publication number Publication date
JPS542703A (en) 1979-01-10
DE2823853A1 (de) 1978-12-14
FR2393342B1 (enrdf_load_stackoverflow) 1984-11-16
NL7805719A (nl) 1978-12-05
JPS6250893B2 (enrdf_load_stackoverflow) 1987-10-27
GB1598113A (en) 1981-09-16
IT7849669A0 (it) 1978-06-02
NL189322C (nl) 1993-03-01
NL189322B (nl) 1992-10-01
DE2823853C2 (enrdf_load_stackoverflow) 1988-05-19
IT1192315B (it) 1988-03-31
FR2393342A1 (fr) 1978-12-29

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Legal Events

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