Television signal scan conversion system with reduced noise sensitivity
US5225907A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1992 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Mar 26, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television signal receiver processes a television signal representing a letterbox image display format with a main image region, and a bar region containing auxiliary "helper" information to help convert from interlaced to progressive scanning. In the presence of image motion, a main image component and the helper component are combined and conveyed to a video processor. In the absence of motion, other image information, e.g., field repeated information, is conveyed to the video processor. The information conveyed to the video processor is determined by a switching network responsive to an control signal from a motion detector which senses low frequency luminance image information substantially exclusive of high frequency image information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.