REC with limited range (16-235), Without correction
You'll note the image is washed out on a PC if the player is not aware of the colorspace
The 2 markers on the histogram are at 16 and 235
Same with mpeg2->PC
(which actually is BT change of colorspace, REC709 vs the other one)
To spot this, take an image with dark black and light white, credits at the end are perfect for this
Look at the histogram, if you see 2 huge spikes where the 2 small markers are, bingo