Strictly speaking, a video card output is nothing more than three DACs. Whether the digital data that's sent to them is RGB or YPbPr doesn't matter, so it probably primarily a driver issue. There are some slight hardware requirements on the video card (DAC max voltage, sync-on-[GY], etc), but the "circuitry" isn't really necessary as it is in the A960. Remember that MPEG *is* YUV... the color transformation to RGB and back to YUV shouldn't even have to be done.I'm curious about these cheaper adapters though. To do YPbPr video means an electrical conversion is required, which is what the 9A60 does. But these adapters mentioned above may be different. Is it that the Radeon 8500 (and related boards) already have the needed conversion circuits and that the adapter just provides the mechanical plug conversion? That would explain why the adapter only is rated to work with specific ATI cards. And if that is the case, then I imagine there is some kind of driver aspect to this to get the card to generate YPbPr compatible signals - which I guess is why another poster here suggests that the adapters listed above currently don't work in Linux.
modes are supported by the HDTV monitor (since there's no way for EDID data to be located in that case). Anyone have any experience with this or a pointer to documentation about it (beyond the PDF listed on the svideo page)?
Why not? IIRC the monitor ID info is sent as a serial bitstream on one of the pins. Why can't the driver be "told" it's a HDTV with the adapter? Seems reasonable.
-Cory
************************************************************************* * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * *************************************************************************
_______________________________________________ mythtv-users mailing list [EMAIL PROTECTED] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
