tm1300 NXP Semiconductors, tm1300 Datasheet - Page 94

• Manufacturer Part Number: tm1300
• Description: Tm-1300 Media Processor
• Manufacturer: NXP Semiconductors

TM1300 Data Book
6.3
In fullres capture mode, the VI unit receives all three vid-
eo components Y, U, and V, as well as synchronization
information (SAV and EAV codes) on the VI_DATA[7:0]
pins in CCIR656 format. See
components Y, U, and V are separated into three differ-
ent streams. Each component is written in packed form
into separate Y, U, and V buffers in the SDRAM. This is
commonly called a planar format
The CCIR656 standard specifies that the camera has to
obey the sampling rules illustrated in
Figure 6-5. Camera YUV 4:2:2 sampling (co-sited luminance/chrominance).
Figure 6-6. Chrominance re-sampling to achieve interspersed sampling.
Figure 6-7. Filtering at the edge of the active area.
6-4
FULLRES CAPTURE MODE
d
c
YUV 4:2:2 CCIR656
b
Resampled sample
PRODUCT SPECIFICATION
a
Figure
input samples
b
1
c
(see
values
6-8. The three video
Figure
d
Chrominance (U,V)
samples
Figure
e
a
a
6-5. VI is ca-
f
b
b
6-10).
g
c
c
h
d
d
i
e
e
j
Active area
f
f
• • •
g
g
pable of chrominance resampling, and can produce sam-
ples in memory in two ways:
VI_CTL.SC=0. ‘Co-sited sampling’ places luminance
and chrominance samples in memory without any modi-
fication. Hence, a planar format results with sampling po-
sitions as per co-sited luminance and chrominance YUV
4:2:2 convention.
Luminance
1.
h
h
samples
zs zt
i
i
The planar format is most suitable as input to software
compression algorithms.
j
j
V ef
Y g '
U ef
zu zv zw zx zy zz zy zx zw
k
k
=
=
=
Y g
l
l
–
–
U
V c
c
+
+
13 U
13 V
e
e
+
+
Philips Semiconductors
5 U
5 V
g U i
g V i
–
–
16
16