S5D0127X01 Datasheet, PDF (23/96 Pages) Samsung semiconductor – MULTISTANDARD VIDEO DECODER/SCALER

S5D0127X01 Data Sheet
MULTIMEDIA VIDEO
1.4. HORIZONTAL CHROMA PROCESSING
A simplified block diagram for the horizontal chroma processing unit is shown in Figure 17.
COS
Saturation
Control
FROM ADC
SIN
Frequency
Tracking
Low
Pass
CFTC
HUE, TSTCFR
V
CBW,FSEC
Low
Pass
U
SECAM
Frequency
Differentiator
RTCO
Control
RTC_DTO
RTC_PID
Gain / PAL
Control
Color
Killer
UGAIN
VGAIN
CKILL
CBW,FSEC
Gain
Tracking
SAT
CGTC
CKILL
TSTCGN
Auto
Detect
Offset
Control
UOFFST
VOFFST
Coring
Control
CORE
Figure 17. Horizontal Chroma Processing Unit
The S5D0127X01 supports chroma input in NTSC, PAL, SECAM and component formats. The color standard is
automatically detected and the various chroma processing blocks are enabled as required for the given chroma
standard. Details of the various chroma processing blocks follow.
1.4.1. IF Compensation
For improved chroma demodulation when the input video is from a mis-tuned IF source, an IF compensation filter
is included that has variable gain for the upper chroma side band. This is controlled by the CIFCMP[1:0] bits at
location CDEM. The frequency response is shown in Figure 18. For convenience, all plots are normalized to the
NTSC modulation frequency.
ELECTRONICS
Modified on May/04/2000
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