Aspect ratio correction using digital filtering
US6411334B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Mar 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is a method and apparatus for correcting aspect ratio of a display by scaling a source array of pixel data in a memory by a scale factor to a destination array of pixel data. The apparatus comprises a coefficient unit, a register unit, and an arithmetic unit. The coefficient unit is coupled to a buffer to load N coefficients. The register unit is coupled to the source array to load N pixel data synchronously with the coefficient unit. The N pixel data are started at a location in the source array according to the scale factor. The arithmetic unit is coupled to the coefficient unit and the register unit to perform a filtering operation on the loaded N pixel data using the corresponding N coefficients. The arithmetic unit generates a filtered output corresponding to a scaled pixel in the destination array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.