NEC µPD72257 Preliminary User's Manual page 161

Video Input (Ravin-M only)
yes
frame end?
y = y +1
yes
y-scaler
x-scaler
Figure 6-4
6.4.2.1
no
yes
reset x-scaler
line end?
no
calculate
final pixel Pyout[xin]
Pyout[xin]
no
pixel output?
yes
calculate
final output pixel Pxout[xout]
Video Input scaler unit
Y-scaler
The y-scaler allows downscaling of a field.The y scaling factor is determined by
VInSCALING.MY[5:0] and is calculated as
y_scale = VInSCALING.MY[5:0] / 64
MY[5:0] must be less than 64. If MY = 0, the y-scaler is disabled.
Preliminary User's Manual S19203EE1V3UM00
new frame
reset y-scaler
y = 0
no
xin = 0
no
line output?
xin = xin +1
next_pixel
calculate
intermediate output pixel
Chapter 6
yes
frame end?
yes
y = y +1
line end?
no
calculate
intermediate luminance
xin = xin +1
161