Combining Deinterlacing and Video Substream Compositing
This section applies only to Microsoft Windows Server 2003 with Service Pack 1 (SP1) and later, and Windows XP with Service Pack 2 (SP2) and later.
To improve video quality on hardware with limited memory bandwidth, driver writers can implement the DeinterlaceBltEx function in their display drivers. The DeinterlaceBltEx function combines, within the YUV color space, operations that composite the video substreams on top of the video stream with operations that deinterlace and/or frame-rate convert each video frame. Driver writers are encouraged to support the DeinterlaceBltEx function in their drivers for all of their deinterlacing modes.
The following topics describe how to support DeinterlaceBltEx: