Method and apparatus for manipulating display of update rate
US6304297A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1998 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0435
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for manipulating the display update rate of video signals to minimize the adverse visual effects caused by adding or deleting frames begins by determining a need value for manipulation of the display update rate. The need value corresponds to increasing drift between the display update rate and the refresh rate. As such, as the drift increases between the display update rate and the refresh rate, the need value increases correspondingly. Next, an appropriateness value for manipulation of the display update rate is determined based on image content. In essence, the appropriateness value is determining whether, if a frame addition or deletion were to occur, would it occur at a point that would produce minimal adverse visual effects. Based on a relationship between the need value and the appropriateness value, the display update rate is manipulated by adding or deleting a frame. The relationship generally provides that as the need value increases, the appropriateness value required decreases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.