SAA7115 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
SAA7115 Datasheet PDF : 214 Pages
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Philips Semiconductors
CS-PD Hamburg
CVIP2
Datasheet
SAA7115
8.1.2 CHROMINANCE AND LUMINANCE PROCESSING
Date:
Version:
10/23/01
0.67
CVBS-IN
or Y-IN
LDEL
YCOMB
Delay Comp.
Y
Subtractor
CHR
Luminance-
Peaking
or
Low Pass,
Y/CVBS
CVBS-IN
or CHR-IN
Quadrature UV Interpolation
Y-Delay adjust.
Modulator
Low Pass 3
LUFI[3:0]
DBRI[7:0]
LUBW UV
CSTD[2:0]
DCON[7:0]
YDEL[2:0] SET_RAW DSAT[7:0]
SET_VBI RAWG[7:0]
RAWO[7:0]
Quadrature
Demodulator
Low Pass 1
downsampling
Adaptive
Comb
Filter
UV Low Pass 2
COLO
Brightness
Contrast
Subcarrier
Generation 2
LCBW[2:0]
SET_RAW
CCOMB
YCOMB
LDEL
BYPS
SET_VBI HODG
Chr.-Incr.
Delay
LDEL
YCOMB
VEDG
MEDG
CMBT
CHBW
SECAM-
Processing
Saturation
Control
Raw data
Gain &
Offset
Control
VEDT
Subcarrier
Generation 1
HUEC
Chr.-Incr.
DTO-reset
Subcarrier
Increment
Generation
&
Divider
Phase
Demod.
Amplitude
Detector
Burst Gate
Accu
Loop Filter
Chroma
Gain
Control
UV-
Adjustment
RTCO
CDTO INCS
FCTC
CSTD[2:0]
ACGC
CGAIN[6:0]
IDEL[3:0]
CODE
SECS
Colorstripe
Burst
Detector
UV
SET_RAW
SET_VBI
PAL-Dly-Line
SECAM-
Recombination
SET_RAW DCVF
SET_VBI
Y-OUT / CVBS-OUT
UV-OUT
HREF-OUT
COLSTR, TYPE3
fH/2 switch signal
Fig.10 Chrominance and luminance processing.
8.1.2.1 Chrominance path
The 9-bit CVBS or chrominance input signal is fed to the input of a quadrature demodulator, where it is multiplied by two
time-multiplexed subcarrier signals from the subcarrier generation block 1 (0° and 90° phase relationship to the
demodulator axis). The frequency is dependent on the chosen colour standard.
The time-multiplexed output signals of the multipliers are low-pass filtered (low-pass 1). Eight characteristics are
programmable via LCWB3 to LCWB0 to achieve the desired bandwidth for the colour difference signals (PAL, NTSC) or
the 0° and 90° FM signals (SECAM).
Confidential - NDA required
Filename: SAA7115_Datasheet.fm
page 28
Last edited by H. Lambers
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