IT1039989B - Procedimento di rivelazione d alterazione di segnali di lettura d informazione registrata su unsupporto ed apparecchhio per effettuarte tale procedimento - Google Patents
Procedimento di rivelazione d alterazione di segnali di lettura d informazione registrata su unsupporto ed apparecchhio per effettuarte tale procedimentoInfo
- Publication number
- IT1039989B IT1039989B IT25655/75A IT2565575A IT1039989B IT 1039989 B IT1039989 B IT 1039989B IT 25655/75 A IT25655/75 A IT 25655/75A IT 2565575 A IT2565575 A IT 2565575A IT 1039989 B IT1039989 B IT 1039989B
- Authority
- IT
- Italy
- Prior art keywords
- procedure
- alteration
- media
- perform
- detection
- Prior art date
Links
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
- H04N5/94—Signal drop-out compensation
-
- 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
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Television Signal Processing For Recording (AREA)
- Manipulation Of Pulses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7425491A FR2299697A1 (fr) | 1974-07-23 | 1974-07-23 | Procédé de détection d'altération de signaux de lecture, et appareil mettant oeuvre un tel procédé |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1039989B true IT1039989B (it) | 1979-12-10 |
Family
ID=9141582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT25655/75A IT1039989B (it) | 1974-07-23 | 1975-07-23 | Procedimento di rivelazione d alterazione di segnali di lettura d informazione registrata su unsupporto ed apparecchhio per effettuarte tale procedimento |
Country Status (7)
Country | Link |
---|---|
US (1) | US4017895A (it) |
JP (1) | JPS5935239B2 (it) |
CA (1) | CA1054707A (it) |
DE (1) | DE2532729C2 (it) |
FR (1) | FR2299697A1 (it) |
GB (1) | GB1518116A (it) |
IT (1) | IT1039989B (it) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1536851A (en) * | 1975-03-10 | 1978-12-20 | Rca Corp | Video carrier wave defect detection and compensation |
US4119812A (en) * | 1977-04-20 | 1978-10-10 | Rca Corporation | Signal defect detection and compensation with signal de-emphasis |
US4158855A (en) * | 1977-11-29 | 1979-06-19 | Rca Corporation | Dropout compensator with proportional duration dropout detector |
JPS54139506A (en) * | 1978-04-20 | 1979-10-30 | Universal Pioneer Corp | Device for detecting droppout |
US4306255A (en) * | 1978-06-22 | 1981-12-15 | Matsushita Electric Industrial Co., Ltd. | Magnetic record/playback system of rotating head type |
US4385374A (en) * | 1980-11-21 | 1983-05-24 | Rca Corporation | Video disc player with RFI reduction circuit including an AGC amplifier and dual function peak detector |
JPS62180568A (ja) * | 1986-02-04 | 1987-08-07 | Sony Corp | デイスク状記録媒体の欠陥検出装置 |
JPS63305686A (ja) * | 1987-06-08 | 1988-12-13 | Sony Corp | ドロップアウト検出回路 |
US5430551A (en) * | 1990-11-07 | 1995-07-04 | Nokia Unterhaltungselektronik Gmbh | Video recorder with distortion corrector circuit |
US6775344B1 (en) | 1999-04-02 | 2004-08-10 | Storage Technology Corporation | Dropout resistant phase-locked loop |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3080487A (en) * | 1959-07-06 | 1963-03-05 | Thompson Ramo Wooldridge Inc | Timing signal generator |
US3071723A (en) * | 1960-05-03 | 1963-01-01 | Potter Instrument Co Inc | Device for detecting defects in magnetic tape |
DE1516930C3 (de) * | 1966-04-27 | 1975-12-18 | Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen | Anordnung zur Frequenzmessung einer Wechselspannung mit Hilfe von Zeilgliedern |
US3474418A (en) * | 1967-06-19 | 1969-10-21 | Ibm | Data tracking system |
DE2213479B1 (de) * | 1972-03-20 | 1973-05-10 | Siemens AG, 1000 Berlin u. 8000 München | Magnettongeraet fuer bandfoermige aufzeichnungstraeger |
US3786358A (en) * | 1972-12-27 | 1974-01-15 | Ibm | Method and apparatus for detecting the beginning of data block |
US3865981A (en) * | 1973-07-16 | 1975-02-11 | Odetics Inc | Clock signal assurance in digital data communication systems |
NL7310869A (nl) * | 1973-08-07 | 1975-02-11 | Philips Nv | Inrichting voor het weergeven van een op een registratiedrager opgetekend videosignaal. |
NL7402014A (nl) * | 1974-02-14 | 1975-08-18 | Philips Nv | Inrichting voor het detekteren van signaaluit- vallen. |
US3909518A (en) * | 1974-06-06 | 1975-09-30 | Rca Corp | Signal switching apparatus for compensating record defects |
US3925605A (en) * | 1974-06-28 | 1975-12-09 | Zenith Radio Corp | Dropout detector for video disc playback |
US3947873A (en) * | 1974-09-19 | 1976-03-30 | Basf Aktiengesellschaft | Method and circuit for detecting and compensating for drop-out and distortion of frequency modulated video signals |
-
1974
- 1974-07-23 FR FR7425491A patent/FR2299697A1/fr active Granted
-
1975
- 1975-07-21 US US05/597,634 patent/US4017895A/en not_active Expired - Lifetime
- 1975-07-22 CA CA231989A patent/CA1054707A/en not_active Expired
- 1975-07-22 DE DE2532729A patent/DE2532729C2/de not_active Expired
- 1975-07-22 GB GB30696/75A patent/GB1518116A/en not_active Expired
- 1975-07-23 IT IT25655/75A patent/IT1039989B/it active
- 1975-07-23 JP JP50090006A patent/JPS5935239B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5935239B2 (ja) | 1984-08-27 |
DE2532729A1 (de) | 1976-02-12 |
CA1054707A (en) | 1979-05-15 |
FR2299697A1 (fr) | 1976-08-27 |
DE2532729C2 (de) | 1990-05-31 |
JPS5163609A (en) | 1976-06-02 |
GB1518116A (en) | 1978-07-19 |
US4017895A (en) | 1977-04-12 |
FR2299697B1 (it) | 1980-04-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19940630 |