ivabo
01-06-2007, 11:04 AM
Video color-space range for DVI-only1 outputs is erroneously set to standard mode (16-235) instead of extended mode (0-255).
A new detection feature to apply Standard CSC mode to TV outputs (including NTSC, PAL, 480i, and 576i), included DVI-only outputs by mistake.
Note: The driver correctly applies extended mode to analog outputs, and standard mode to TV outputs (including NTSC, PAL, 480i, and 576i).
A future driver release will correct this and apply the extended-mode color space to DVI-only outputs. You can work around this issue by forcing either standard or extended mode as follows:
1) Launch regedit and determine the current primary display card by looking in
"HKey_Local_Machine\Hardware\DeviceMap\Video" and note the GUID (global unique identifier assigned by Windows), which is the long string in brackets { } at the end of the entry "\device\video0".
2) Look in "HKey_Local_Machine\SYSTEM\CurrentControlSet\Contro l\Video\{GUID}\0000" where {GUID} is the number derived from the previous step.
3) Open the "0000" directory and create a new DWORD called "VMRCCCSStatus" and give it a value of
0x3 - to force use of the standard YUV range of 16-235
0x1 - to force use of the extended YUV range of 0-255
A new detection feature to apply Standard CSC mode to TV outputs (including NTSC, PAL, 480i, and 576i), included DVI-only outputs by mistake.
Note: The driver correctly applies extended mode to analog outputs, and standard mode to TV outputs (including NTSC, PAL, 480i, and 576i).
A future driver release will correct this and apply the extended-mode color space to DVI-only outputs. You can work around this issue by forcing either standard or extended mode as follows:
1) Launch regedit and determine the current primary display card by looking in
"HKey_Local_Machine\Hardware\DeviceMap\Video" and note the GUID (global unique identifier assigned by Windows), which is the long string in brackets { } at the end of the entry "\device\video0".
2) Look in "HKey_Local_Machine\SYSTEM\CurrentControlSet\Contro l\Video\{GUID}\0000" where {GUID} is the number derived from the previous step.
3) Open the "0000" directory and create a new DWORD called "VMRCCCSStatus" and give it a value of
0x3 - to force use of the standard YUV range of 16-235
0x1 - to force use of the extended YUV range of 0-255