When video suffers from Y/C delay error, there will be a mismatch in the timing among the luminance and/or color channels, with resulting visible misalignment in how colors appear in the monitor. A misalignment of Y/C shows a blurry edge around areas with high contrast color difference, and will be most apparent around sharp edges of objects in the video image.
Can it be fixed?
Yes, some VTR integrated or stand-alone time base correctors have Y/C adjustment capability.
In the enlarged detail boxes above, you can see a white edge along the reporter’s yellow jeans, as well as a green hue around the orange drop shadow in the lettering on the sign behind them. This is caused by misaligned Y and C components in the video signal. The error is corrected in the image below.