
Figure 11.7
Chroma subsam-
piing in
4:2:0p alternates
frame-to-frame in a two-
frame sequence, even though
scanning is progressive.
Quasi-interlace
in consumer SDTV is
comparable to
progressive
segmented-frame
(PsF)in H DTV,
though at 25 or 29.97 frames per
second instead of 24. See page 62.
sampling rate of 18 MHz (i.e., 4/3 times 13.5 MHz). This
scheme offers somewhat increased pixel count
compared to 4:3
systems;
however, it is rarely used.
Progressive SDTV
(480p/483p)
A progressive 483p59.94 studio standard has been
established in SMPTE 293M, with parameters similar to
Rec. 601, but without interlace ...