cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 96

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

1.0 Functional Description
1.3 Device Description
Figure 1-35. CX25870 Driving a Type II SCART Connector (Y/C and BBC SCART Compliant)
1.3.44 Interlaced Standard Definition Analog Component Video TV Outputs
1-80
CX25870/871
CVBS/B
C/G
Y/R
3.3 V
type of SCART output utilize the same DAC low-pass filters used for standard
definition TV outputs listed in
In this mode of operation, the CX25870/25871 provides a set of Component
Video Y, PB (B–Y), PR (R–Y) outputs based on a 480 line interlaced RGB or
YCrCb digital input format. Some DVD Players, such as those made by Toshiba
and Panasonic, call the Component Video Output format by their branded name,
“ColorStream.” Others refer to the two EIA standards governing this video
format–EIA-770.1 and EIA-770.2-A, and state this video type as Interlaced
Component Video, 480i Component Video, or Component YUV. Regardless of
the different names, the video format remains the same. For instructions on how
to configure the CX25870/871 to generate progressive 480p Component Video
(or ColorStream Pro), refer to that particular section in this data sheet.
to generate two color difference signals (P
and C
generating device to bypass the TV’s internal Y/C separator and color decoder
circuits. The analog information therefore gets routed directly into the TV’s
matrix decoder. By sending the pure component video signal directly to a
Component Video or ColorStream input-equipped display media, the input signal
forgoes the extra processing that normally would degrade the analog image.
3.3 V
Conexant recommends that any designer utilizing the CX25870 with either
The designer can enable ColorStream by using three of the CX25870’s DACs
B
) and a single luminance signal (Y). These three channels allow the video
75 "
1%
75 "
Conexant
1%
Std Def
Std Def
LPF
LPF
Flicker-Free Video Encoder with Ultrascale Technology
Chapter 3.0
R
of this data sheet.
and P
B
21
19
17
15
13
11
9
7
5
3
1
sometimes referred to as C
Connector
SCART
CX25870/871
20
18
16
14
12
10
8
6
4
2
100381B
+3.3 V
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R