Method and device for video scene composition including mapping graphic elements on upscaled video frames
US6828979B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2001 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Dec 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a method and device for obtaining upscaled video frames including 2D graphic elements from primary video objects of smaller format, while ensuring no degradation of said 2D graphic elements will take place. To this end, separate and parallel processes are performed on video frames and on 2D graphic elements. The first process consists of generating rendered frames from said primary video objects, said rendered frames being afterwards upscaled to the desired output video format. The second process consists of directly rendering in said output format the 2D graphic elements by using a drawing algorithm ensuring no degradation of said 2D graphic elements will take place. In a final step, rendered 2D graphic elements are mapped on the upscaled video frames. Compared with an upscaling performed on video frames including 2D graphic elements which leads to upscaled video frames including degraded 2D graphic elements, this method yields upscaled video frames including 2D graphic elements of good resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.