Frame conversion method, frame conversion circuit, and electronic camera
US7898595B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2003 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Sep 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0135
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for converting frames that can display smooth moving images is provided. A memory (16) to which image data of frames in the NTSC format is written is provided. A memory controller (14) for retrieving image data of an odd field and an even field from the memory (16) every odd field period and even field period in the frame period of the PAL format is provided. An interpolating circuit (76) is provided. The interpolating circuit (76) mixes the image data of the odd field retrieved by the memory controller (14) and image data of a next odd field at a predetermined ratio to output as image data of an odd field in the frame period of the PAL format, and mixes the retrieved image data of the even field and image data of a next even field at a predetermined ratio to output as image data of an even field in the frame period of the PAL format. A coefficient-generating circuit (73) for changing the mixing ratios in the interpolating circuit (76) every field period of the PAL format is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.