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The sync mechanism keeps the video interface at the established pixel clock rate but dynamically adjusts the vertical blanking interval. The monitor keeps displaying the currently received image until a new frame is presented to the video card's frame buffer then transmission of the new image starts immediately.
The parameters defined by standard include horizontal blanking and vertical blanking intervals, horizontal frequency and vertical frequency (collectively, pixel clock rate or video signal bandwidth), and horizontal/vertical sync polarity. The standard was adopted in 2002 and superseded the Generalized Timing Formula.
Vertical synchronization or Vsync can refer to: Analog television#Vertical synchronization, a process in which a pulse signal separates analog video fields; Screen tearing#Vertical synchronization, a process in which digital graphics rendering syncs to match up with a display's refresh rate; Vsync (library), a software library written in C# for ...
During the vertical blanking interval, the driver orders the video card to either rapidly copy the off-screen graphics area into the active display area (double buffering), or treat both memory areas as displayable, and simply switch back and forth between them (page flipping).
10: Bits 7–4: Vertical front porch (sync offset) lines 4 lsbits (0–15) Bits 3–0: Vertical sync pulse width lines 4 lsbits (0–15) 11: Bits 7–6: Horizontal front porch (sync offset) pixels 2 msbits (0–3) Bits 5–4: Horizontal sync pulse width pixels 2 msbits (0–3) Bits 3–2: Vertical front porch (sync offset) lines 2 msbits (0–3 ...
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Compositing window managers often combine the "copying" operation with "compositing" used to position windows, transform them with scale or warping effects, and make portions transparent. Thus, the "front buffer" may contain only the composite image seen on the screen, while there is a different "back buffer" for every window containing the non ...
Change any of the following settings, then click Save to finalize your selection: • Cc/Bcc Select whether or not you want Cc/Bcc displayed. • Default Compose Mode Select how you want the compose screen displayed.