I've been learning about the blanking intervals in video signals and often see diagrams like this:
But, I often also see the blanking regions describes as being on both sides of the image:
Which is correct? I would have thought the latter as I would have thought for CRTs the electron beam would be blanked at the end of a line so it can return to the start of the next line and then un-blanked. Same for vertical.
Which image/description is correct?