ML6426-1 FAIRCHILD [Fairchild Semiconductor], ML6426-1 Datasheet - Page 7

• Manufacturer Part Number: ML6426-1
• Description: High Bandwidth Triple Video Filters with Buffered Outputs for RGB or YUV
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

Table 1. HDTV / Advanced TV Applications: (From Table 10.3 from ATSC document A54)
P=progressive scan, I=interlaced scan
Table 2. Choosing the Correct Reconstruction Filter and Video Amplifier for TV Applications, ML6426 options
P=progressive scan, I=interlaced scan, na = not available
Notes
1. NTSC display rates, can be fed directly into NTSC encoder (set top box)
2. 60 Hz also includes 59.94Hz
3. Custom frequencies ranging ± 3 to 6MHz can be special cut to order
DATA SHEET
Typical Applications
Reconstruction filter selection for HDTV and
VGA signal filtering
The filtering requirements for HDTV and VGA standards
vary depending on the resolution of the image to be dis-
played, and its refresh rate. The actual refresh rate of the dis-
play is not necessarily the same as the transmission rate of
the frames of images. Some formats use a frame rate of
30Hz, but the display of those formats cannot be scanned
REV. 3A August 2004
SMPTE
Pixels
1920
1280
704
640
1920
1280
704
704
640
640
Vertical Lines
480
480
1080
720
480
480
(Note 1)
(Note 1)
1080
720
480
480
60P, 30P,
60P, 30P,
60P, 30P,
30P, 24P
24P
24P
24P
60I
60I
Aspect Ratio
16:9 and 4:3
16:9
16:9
4:3
60Hz
60Hz
60Hz
60Hz
60Hz
60Hz
onto the CRT at 30Hz. Excessive large area flicker would
result. Such kinds of flicker can be seen on a PAL display
with its brightness set high. To avoid this, the video will need
to be stored in a frame buffer. This buffer already exists in
the MPEG decoder of HDTV systems, so there is no cost
penalty. The buffer is read out at twice the rate as the frame
rate for 30Hz systems, thus getting us a refresh rate of 60Hz.
Similar things are done for the 24Hz frame rate formats to
boost them to a 60Hz refresh rate.
70.6KHz
47.1KHz
15.7KHz
15.7KHz
31KHz
31KHz
Picture Transmission Rate
12.27MHz
13.5MHz
24.5MHz
162MHz
60MHz
27MHz
60P, 60I, 30P, 24P
60P, 60I, 30P, 24P
60P, 30P, 24P
60I, 30P, 24P
6.75MHz
13.5MHz
81MHz
30MHz
12MHz
6MHz
ML6426-4
ML6426-2
ML6426-4
ML6426-1
ML6426-5
ML6426-1
ML6426-2
N/A
ML6426
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