Method for converting progressive scan signals and converter thereof
US5666166A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1995 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Dec 4, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A converter comprising an input terminal 1 for receiving a chrominance signal of 4:2:2P format progressive scan signal, a low pass filter 2 for passing low frequency component contained in the chrominance signal input to the input terminal 1, high pass filter 3 for passing high frequency component contained in the chrominance signal input to the input terminal 1, a detection means 4 for detecting the high frequency component level of the chrominance signal filtered with the high pass filter 3, a sub-sampling means 6 for sub-sampling the chrominance signal and converting the sub-sampled signal into a chrominance signal of 4:2:2P format progressive scan signal and a switch 5 for connecting the low pass filter 2 and the sub-sampling means 6 to input the low pass filtered chrominance signal to the sub-sampling means 6 when the high frequency component level is detected to be a predetermined level or higher, and for connecting the input terminal 1 and the sub-sampling means 6 to input the chrominance signal input to the input terminal 1 to the sub-sampling means 6 when the high frequency component level is detected to be lower than the predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.