On Tue, 17 Jul 2007 11:37:08 -0700 James Richard Tyrer <[EMAIL PROTECTED]> wrote:
> This chip appears to be able to do color space conversion and scaling > for 1080p line picture. > > http://www.i-chipstech.com/pdf/C762%20Brochure.PDF The features are nice, but nothing we really need. I think the chip is intended for full 1080i/p HD-TV producers that are not capable or do not have the time to build their own scaler/deinterlacer. Main problem with this chip will be its interface (it doesn't integreate well into OGAs current layout) and the lack of YUV 4:2:0 support (most common subsampling format) The scaler isn't necessary for us as OGA will have one anyways (for the 3D stuff). The color space YUV->RGB conversion is rather simple to implement. Upsampling from 4:2:2 to 4:4:4 is nothing difficult either (simple FIR filter operating on scanlines), but the upsampling from 4:2:0 to 4:2:2 is (upsampling in vertical direction, guess whey they don't do it). Deinterlacing is something that cannot be really done without some information from video source (or some assumptions on the video output device) and if only a simple implementation is used (which i assume), then the quality will suck. All in all i would say we are better off to implement the stuff done by this chip in OGA directly. Attila Kinali -- Praised are the Fountains of Shelieth, the silver harp of the waters, But blest in my name forever this stream that stanched my thirst! -- Deed of Morred _______________________________________________ Open-hardware mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-hardware
