Flying spot single field scan telecine apparatus
US4191972A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1977 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Dec 30, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to avoid the registration problems involved in multiple scanning of each film frame in a continuous motion flying spot telecine, the video information derived from one field scan only of each frame is used to build up the complete television signal by storage and delay of the video information to fill in the missing fields. The loss of vertical resolution thus produced can be compensated if desired by the use of a known vertical aperture corrector. Preferably, however, a high frequency spot wobble is added to the scanning raster and consecutive television fields are derived alternately from the positive and negative half cycles of the spot wobble.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.