CA1089984A - System for compensating for incorrect duty factor when reading out information stored in a video disc - Google Patents
System for compensating for incorrect duty factor when reading out information stored in a video discInfo
- Publication number
- CA1089984A CA1089984A CA244,367A CA244367A CA1089984A CA 1089984 A CA1089984 A CA 1089984A CA 244367 A CA244367 A CA 244367A CA 1089984 A CA1089984 A CA 1089984A
- Authority
- CA
- Canada
- Prior art keywords
- duty factor
- signal
- error
- spurious
- curve
- 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
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- XUKUURHRXDUEBC-KAYWLYCHSA-N Atorvastatin Chemical compound C=1C=CC=CC=1C1=C(C=2C=CC(F)=CC=2)N(CC[C@@H](O)C[C@@H](O)CC(O)=O)C(C(C)C)=C1C(=O)NC1=CC=CC=C1 XUKUURHRXDUEBC-KAYWLYCHSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
-
- 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
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US564,388 | 1975-04-02 | ||
| US05/564,388 US3988531A (en) | 1975-04-02 | 1975-04-02 | System for compensating for incorrect duty factor when reading out information stored in a video disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1089984A true CA1089984A (en) | 1980-11-18 |
Family
ID=24254269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA244,367A Expired CA1089984A (en) | 1975-04-02 | 1976-01-28 | System for compensating for incorrect duty factor when reading out information stored in a video disc |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3988531A (enExample) |
| CA (1) | CA1089984A (enExample) |
| FR (1) | FR2306584A1 (enExample) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2358797A1 (fr) * | 1976-07-16 | 1978-02-10 | Thomson Brandt | Systeme de correction automatique du facteur de forme de l'onde porteuse issue de la lecture d'un support d'information |
| NL7705667A (nl) * | 1977-05-24 | 1978-11-28 | Philips Nv | Inrichting voor het automatisch regelen van de asymmetrie van een signaal. |
| US4272786A (en) * | 1978-10-16 | 1981-06-09 | Rca Corporation | Video disc playback apparatus with non-linear aperture correction |
| US4312013A (en) * | 1979-09-19 | 1982-01-19 | Rca Corporation | Non-linear aperture correction circuit |
| NL8000123A (nl) * | 1980-01-09 | 1981-08-03 | Philips Nv | Inrichting voor het schrijven van digitale informatie in een schijfvormige optisch uitleesbare registratiedrager. |
| US4309722A (en) * | 1980-05-27 | 1982-01-05 | Rca Corporation | Video disc player noise reduction circuit |
| US4329712A (en) * | 1980-06-24 | 1982-05-11 | Rca Corporation | Adaptive distortion elimination circuitry for a video disc player |
| US4360829A (en) * | 1980-06-24 | 1982-11-23 | Rca Corporation | Active distortion elimination circuitry for a video disc player |
| JPS5778637A (en) | 1980-10-31 | 1982-05-17 | Matsushita Electric Ind Co Ltd | Optical information recorder |
| US4549288A (en) * | 1982-12-20 | 1985-10-22 | North American Philips Corporation | Apparatus for enhancing the playback signal in an optical data recording system |
| JPS61219286A (ja) * | 1985-03-25 | 1986-09-29 | Sony Corp | 時間軸補正装置の書込クロツク発生回路 |
| DE3676870D1 (de) * | 1985-04-22 | 1991-02-21 | Csk Corp | Binaeres kodierverfahren fuer daten, welche von einer optischen platte gelesen werden und geraet dafuer. |
| GB2224911A (en) * | 1988-11-09 | 1990-05-16 | Philips Nv | Method of and apparatus for assigning binary values to sample values |
| US5070495A (en) * | 1989-04-12 | 1991-12-03 | International Business Machines Corporation | Write calibration for magnetooptic disk recorders |
| US5043971A (en) * | 1989-09-28 | 1991-08-27 | Tandy Corporation | Method and apparatus for pre-compensation in an optical disc |
| US5128921A (en) * | 1989-09-28 | 1992-07-07 | Tandy Corporation | Method and apparatus for pre-compensation in an optical disc |
| US5185733A (en) * | 1990-03-01 | 1993-02-09 | International Business Machines Corporation | Calibrating lasers for optical recording using a maximal readback signal amplitude as a criterion |
| US5268893A (en) * | 1991-10-18 | 1993-12-07 | International Business Machines Corporation | Write power calibration utilizing least squares fit of read-back signals for moving media memory |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL280738A (enExample) * | 1961-07-10 | |||
| GB1460911A (en) * | 1973-03-20 | 1977-01-06 | Rca Corp | Colour picture and sound record and recording/playback apparatus and methods therefor |
| NL7402014A (nl) * | 1974-02-14 | 1975-08-18 | Philips Nv | Inrichting voor het detekteren van signaaluit- vallen. |
| NL7402078A (nl) * | 1974-02-15 | 1975-08-19 | Philips Nv | Inrichting voor het uitlezen van een schijfvormige registratiedrager. |
-
1975
- 1975-04-02 US US05/564,388 patent/US3988531A/en not_active Expired - Lifetime
-
1976
- 1976-01-28 CA CA244,367A patent/CA1089984A/en not_active Expired
- 1976-04-02 FR FR7609707A patent/FR2306584A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| US3988531A (en) | 1976-10-26 |
| FR2306584B3 (enExample) | 1978-12-22 |
| FR2306584A1 (fr) | 1976-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |