Image display apparatus having a circuit for magnifying and processing a picture image in accordance with the type of image signal
US6151079A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 23, 1999 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Jul 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a video signal processing apparatus for converting video signals based on a desired transmission system such as NTSC, PAL, MUSE or any other system so as to conform to a display unit of a desired screen system such as XGA, VGA or the like. The apparatus has a feature that it is provided with a PLL circuit for changing a sampling frequency used by an analog-to-digital converter for converting inputted video signals into digital signals in accordance with the sort of the transmission system of the video signals, and a controller for controlling picture element interpolation of the digital signals performed by a picture image magnifying circuit for magnifying the video signals horizontally and vertically, in accordance with the sort of the transmission system of the video signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.