S5D0127X01 Datasheet, PDF (27/96 Pages) Samsung semiconductor – MULTISTANDARD VIDEO DECODER/SCALER

S5D0127X01 Data Sheet
MULTIMEDIA VIDEO
Luma
Horizontal
Scaler
Chroma
Horizontal
Scaler
Luma
Vertical
Scaler
Luma
Adaptive
Comb
Chroma
Vertical
Scaler
Chroma
Comb
Vertical
BW
Y
Retention
Sum
C
Figure 22. Vertical Processing
1.5.1. Luma Comb Filter
The luma comb filter reduces high frequency chroma leakage into the luminance path. The S5D0127X01 uses
2-line stored luma data for combing. Filter coefficients for different video input standards are provided and can be
selected automatically based on the video input. Filter coefficients may also be set manually.
An optional active comb is employed for NTSC video. Selection of luma comb coefficients is based on line-to-line
chroma correlation.
Provision is made to disable luma comb for S-video, component, or digital video input. This is achieved by
programming the luma comb control register MNYCMB to “1”, and by choosing the value 3 or 4 for YCMBCO[2:0].
This will result either a 1-line or 2-line luma delay. Care must be exercised when disabling the luma comb so that
luma line delay matches the chroma path line delay.
Special filtering is applied to ensure that high vertical bandwidth is retained for the luma path.
1.5.2. Chroma Comb Filter
The chroma comb filter provides further color separation from the composite video. Filter coefficients can be
automatically selected based on the input video standard or manually set using NMCCMB and CCMBCO[2:0].
ELECTRONICS
Modified on May/04/2000
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