Method and circuit for signal processing of format conversion of picture signal
US6144412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to carry out format conversion or scaling processing of picture signal by a memory having a small capacity, picture signals of interlace scanning are converted into picture signals of progressive scanning by interpolation by using an IP convertor 1 and a multiple scan convertor 3, a scaling processing of expansion and compression in the horizontal direction is firstly performed by using a horizontal scaling unit 5, processing of expansion, compression, frame rate conversion, synchronization and the like are secondly performed by using a vertical scaling unit 6 and commonly using memories used in scaling processing in the vertical direction and finally, color space conversion or inverse gamma processing is performed by using a picture quality improving unit 8 thereby converting the picture signals into picture signals S6 having a predetermined format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.