The video component(s) of a digital audio-visual first program are switched onto
the video components of a second digital, audio-visual program by (1) switching
onto the video component of the second program, subsequent to the switch command
and to the end of a picture of the first program, and (2) replacing, as seen in
the order of transmission, each non Intra picture of the component of a second
program, with a picture having coding performed independently of (a) the picture
data of the replaced picture and (b) of the contents of the pictures to which it
refers until the beginning of the next Intra picture of the component of the second program.
