ML6426CS-15 MICRO-LINEAR [Micro Linear Corporation], ML6426CS-15 Datasheet - Page 7

• Manufacturer Part Number: ML6426CS-15
• Description: High Bandwidth Triple Video Filters with Buffered Outputs for RGB or YUV
• Manufacturer: MICRO-LINEAR [Micro Linear Corporation]

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
displayed, and its refresh rate. The actual refresh rate of
the display 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 onto the CRT at 30Hz. Excessive large area
P=progressive scan, I=interlaced scan
P=progressive scan, I=interlaced scan, na = not available
Note 1: NTSC display rates, can be fed directly into NTSC encoder (set top box)
Note 2: 60 Hz also includes 59.94Hz
Note 3: custom frequencies ranging ± 3 to 6MHz can be special cut to order
SMPTE
SMPTE
274M
Table 2: Choosing the Correct Reconstruction Filter and Video Amplifier for TV Applications, ML6426 options
PIXELS
1920
1280
704
640
Table 1: HDTV / Advanced TV Applications: (From Table 10.3 from ATSC document A54)
1920
1920
1280
704
704
640
640
480
480
VERTICAL LINES
1080
1080
720
480
480
(Note 1)
(Note 1)
1080
720
480
480
60P, 30P,
60P, 30P,
60P, 30P,
30P, 24P
November, 1999
24P
24P
24P
60I
60I
60I
ASPECT RATIO
16:9 and 4:3
60Hz
60Hz
60Hz
60Hz
60Hz
60Hz
60Hz
16:9
16:9
4:3
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.
35.3KHz
70.6KHz
47.1KHz
15.7KHz
15.7KHz
31KHz
31KHz
12.27MHz
13.5MHz
24.5MHz
162MHz
PICTURE TRANSMISSION RATE
81MHz
60MHz
27MHz
60P, 60I, 30P,24P
60P, 60I, 30P,24P
60P, 30P, 24P
60I, 30P, 24P
40.5MHz
6.75MHz
13.5MHz
81MHz
30MHz
12MHz
6MHz
ML6426
ML6426-5
ML6426-6
ML6426-4
ML6426-1
ML6426-2
ML6426-4
ML6426-2
ML6426-1
N/A
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