PNX1300 Philips, PNX1300 Datasheet - Page 105

• Manufacturer Part Number: PNX1300
• Description: Media Processors
• Manufacturer: Philips

Philips Semiconductors
6.4
Halfres capture mode is identical in operation to fullres
capture mode except that horizontal resolution is re-
Figure 6-14. Halfres interspersed sample capture.
Figure 6-12. VI halfres planar memory format.
Figure 6-13. Halfres co-sited sample capture.
Y_BASE_ADR
U_BASE_ADR
HALFRES CAPTURE MODE
YUV 4:2:2 CCIR656
YUV 4:2:2 CCIR656
U_DELTA
Y_DELTA
Halfres capture
Halfres capture
sample results
sample results
input samples
input samples
pix0
pix0
WIDTH/4 pixels
pix1
pix2
a
a
pix2
b
b
•
WIDTH/2 pixels
•
c
c
•
d
d
•
e
e
•
f
f
•
g
g
duced by a factor of two on both luminance and chromi-
nance data.
Referring to
grammed to capture HEIGHT lines of WIDTH pixels in
PRELIMINARY SPECIFICATION
(Repeated for V_BASE_ADDR,
h
h
W/2–1
pix
i
i
Y
Y
U
V f '
U f '
V
h
g
f
'
f
'
'
=
j
'
=
V_DELTA)
j
=
=
=
=
–
–
–
k
–
k
–
–
3Y
3V c
3Y
3U
3V
3U c
Figure 6-9
e
l
d
l
c
c
+
+
+
+
+
+
19Y
19V e
19Y
19 U
19V
19U e
g
f
e
e
+
+
+
+
+
+
32Y
32 Y
19V g 3V i
19V
19U
19U g 3U i
and
g
h
g
g
+
+
–
–
–
–
19Y
19Y
3V
Figure
3U
i
i
h
i
–
–
32
32
32
32
3Y
3Y
6-11, if VI is pro-
k
j
64
64
Video In
6-9