Component video colour coding for HD
In the previous chapter, Component video colour coding for SD, I detailed various component colour coding systems that use the luma coefficients specified in BT.601. Unfortunately, for no good technical reason, BT.709 for HD standardized different luma coefficients. Deployment of HD requires upconversion and down-conversion capabilities both at the studio and at consumers’ premises; this situation will persist for a few decades. Owing to this aspect of conversion between HD and SD, if you want to be an HD expert, you have to be an SD expert as well!
Today’s computer imaging systems – for still frames, desktop video, and other applications – typically use the BT.601 parameters, independent of the image’s ...