Software Vsync filtering
US12170071B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2024 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | Jan 26, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatuses are provided for alignment of hardware and software Vsync signals through filtering out delayed timestamp signals in a hardware timestamp signal used to generate the software Vsync. The alignment may occur when a display client is operating in a video mode but not a command mode. A compositor or processing unit may receive a hardware Vsync signal from a display using a video mode, generate a hardware timestamp signal based on the hardware Vsync signal, determine a delay for a pulse in the hardware timestamp signal based on a delay for a set of previous frames, determine whether the delay for the pulse is over a threshold, and control rendering and transmission of a frame to the display based on the delay for the pulse being over the threshold. Thus, accurate Vsync signal synchronization may occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.