SAA7199BWP PHILIPS [NXP Semiconductors], SAA7199BWP Datasheet - Page 22

• Manufacturer Part Number: SAA7199BWP
• Description: Digital Video Encoder DENC GENLOCK-capable
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
C
1. Decimation for 4 : 4 : 4 format input data (formats 4, 5 and 7; Fig.4).
2. Interpolation for 4 : 1 : 1 input data into 4 : 2 : 2 data, also suitable to reduce the bandwidth of 4 : 2 : 2 data. This filter
3. Interpolation at 13.5 MHz for 4 : 2 : 2 input data into 4 : 4 : 4 data before modulating baseband signals onto the
1996 Sep 27
handbook, halfpage
HROMINANCE FILTERING IN THE ENCODER
Digital Video Encoder (DENC)
GENLOCK-capable
Fig.4
is controlled by the SCBW-bit (SCWB = 1 means active).
colour subcarrier. Figures 5, 6 and 7 show the overall transfer characteristics of chrominance in “standard bandwidth
condition” (SCBW = 1). Figures 8 and 9 show the overall transfer characteristics of chrominance in enhanced
bandwidth condition (SCBW = 0), which is not possible for 4 : 1 : 1 input data. The transfer curves are slightly
different at 12.27 and 14.75 MHz.
(dB)
10
10
20
30
40
50
0
0
Transfer characteristics of
4 : 4 : 4 to 4 : 2 : 2 decimator.
0.2
0.4
0.6
f / f CLK
MEH346
0.8
22
handbook, halfpage
Fig.5
(dB)
10
10
20
30
40
50
0
0
Overall transfer characteristics 4 : 1 : 1
input data.
2
4
Product specification
6
SAA7199B
f (MHz)
MEH347
8