CA1124402A - Apparatus for scanning variable area optical sound tracks - Google Patents
Apparatus for scanning variable area optical sound tracksInfo
- 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
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 13
- 230000005236 sound signal Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 8
- 230000000670 limiting effect Effects 0.000 claims description 6
- 108091008695 photoreceptors Proteins 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 2
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 230000009977 dual effect Effects 0.000 description 7
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004377 microelectronic Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241000448280 Elates Species 0.000 description 1
- 241000364027 Sinoe Species 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US80304277A | 1977-06-03 | 1977-06-03 | |
| US803,042 | 1977-06-03 |
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 (de) |
| CA (1) | CA1124402A (de) |
| DE (1) | DE2823853A1 (de) |
| FR (1) | FR2393342A1 (de) |
| GB (1) | GB1598113A (de) |
| IT (1) | IT1192315B (de) |
| NL (1) | NL189322C (de) |
Families Citing this family (2)
| 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 |
| EP1317848A2 (de) * | 2000-09-11 | 2003-06-11 | BTS Holding International B.V. | Vorrichtung und verfahren zur wiedergabe von lichttonaufzeichnungen |
Family Cites Families (5)
| 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 |
-
1978
- 1978-05-22 GB GB21023/78A patent/GB1598113A/en not_active Expired
- 1978-05-25 NL NLAANVRAGE7805719,A patent/NL189322C/xx not_active IP Right Cessation
- 1978-05-31 JP JP6563278A patent/JPS542703A/ja active Granted
- 1978-05-31 CA CA304,524A patent/CA1124402A/en not_active Expired
- 1978-05-31 DE DE19782823853 patent/DE2823853A1/de active Granted
- 1978-06-02 IT IT49669/78A patent/IT1192315B/it active
- 1978-06-02 FR FR7816650A patent/FR2393342A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS542703A (en) | 1979-01-10 |
| NL189322B (nl) | 1992-10-01 |
| IT7849669A0 (it) | 1978-06-02 |
| GB1598113A (en) | 1981-09-16 |
| NL189322C (nl) | 1993-03-01 |
| DE2823853C2 (de) | 1988-05-19 |
| FR2393342A1 (fr) | 1978-12-29 |
| FR2393342B1 (de) | 1984-11-16 |
| IT1192315B (it) | 1988-03-31 |
| DE2823853A1 (de) | 1978-12-14 |
| JPS6250893B2 (de) | 1987-10-27 |
| NL7805719A (nl) | 1978-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |