Philips Semiconductors
Product specification
9-bit video input processor
SAA7113H
handbook, full pagewidth
ANALOG INPUT
AMPLIFIER
9
gain
DAC
ANTI-ALIAS FILTER
ADC
9
LUMA/CHROMA DECODER
1
0
NO ACTION
VBLK
1
0
HOLDG
1
0
X
1
0
HSY
0
1
>254
1
1
1
0
0
0
<4
<1
>254
X = 1
X = 0
1
0
>248
+/− 0
+1/L
+1/F
+1/LLC2 −1/LLC2
−1/LLC2
GAIN ACCUMULATOR (18 BITS)
STOP
ACTUAL GAIN VALUE 9-BIT (AGV) [−6/+6 dB]
1
0
X
1
0
HSY
1
0
Y
AGV
UPDATE
FGV
GAIN VALUE 9-BIT
MHB327
X = system variable; Y = (IAGV − FGVI) > GUDL; VBLK = vertical blanking pulse;
HSY = horizontal sync pulse; AGV = actual gain value; FGV = frozen gain value.
Fig.7 Gain flow chart.
12
1999 Jul 01
NXP [ NXP ]
