Philips Semiconductors
Preliminary specification
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb filter, VBI-data slicer and high performance scaler
SAA7114H
+255
+209
+255
+199
handbook, full pagewidth
white
white
LUMINANCE
LUMINANCE
black
black shoulder
+71
+60
black shoulder = black
+60
SYNC
SYNC
1
1
sync bottom
sync bottom
MGD700
b. Sources not containing black level offset.
a. Sources containing 7.5 IRE black level offset (e.g. NTSC M).
CVBS levels with default settings RAWG[7:0] = 64 and RAWO[7:0] = 128.
Equation for modification of the raw data levels via bytes RAWG and RAWO:
RAWG
64
CVBSOUT = Int
× (CVBSnom – 128) + RAWO
------------------
It should be noted that the resulting levels are limited to 1 to 254 in accordance with “ITU Recommendation 601/656”.
Fig.18 CVBS (raw data) range for scaler input, data slicer and X-port output.
2000 Mar 15
29
NXP [ NXP ]
