The ADC calibration aligns the 8-bit video input with the 10-bit display processor. The levels you use during calibration get mapped to DSP level 4 (black) and DSP level 940 (white). Since the DSP is 10-bit it has 1024 levels so you want to map input level 235 to DSP level 940 if you want to preserve all the codes between 235-255 (Superwhite). This will map input level 255 to (approximately) contrast level 100 so you shouldn't see any clipping ("pinking") until you get near 100 contrast. Personally I like to calibrate such that video level 235 gets mapped closer to the upper end of the 10-bit scale to provide more codes (less banding). You can burn this
iso to DVD and use one of the three patterns on it to calibrate your ADC.
- Use your DVD player in YCbCr mode attached to HDMI1, you can have brightness and contrast set anywhere but I suggest 50,95 (cell light doesn't matter). Using YCbCr mode will ensure that the input is correct even if you end up using RGB input.
- I don't know if it matters whether you use dynamic or movie mode (I use movie mode) so you might want to test both. Since the SM defaults to dynamic mode you have to use the emulator to unlock the SCC menu and change from dynamic to movie.
- Play the pattern you want (upscaled to 720p or 1080p) and navigate to ADC/WB in the SM, select ADC calibration and then select HDMI. If it fails do it again until it succeeds.
Patterns on the disk
1. 16-220 (will clip values above 225 at contrast ~95)
2. 16-235 (will clip values above 238 at contrast ~95)
3. 16-245 (will clip values above 247 at contrast ~95)
4. 16-255 (nominal case, should not clip 255 at contrast ~95)
5. This is a 1% full white (235) pattern for testing peak white luminance.