Samsung LNT4669F Training Manual page 60

Ⅱ. Inside of Peony2
SCALER: SVP-LX64
The OSD area on screen can be magnified and minified in the horizontal and vertical directions
respectively. Two registers control the degree to which the OSD area can be magnified and
minified. The OSD supports two basic methods of updating the OSD memory: single-buffer and
double buffer. In the single-buffer operation, the OSD display is disabled before the CPU writes
new OSD data. In double-buffer operation, the OSD display does not need to be disabled before
the CPU updates the OSD data. The available OSD memory in frame buffer is typically
partitioned into two equal size buffers, with one buffer being displayed while the other is being
updated.