L64105 LSI Logic Corporation, L64105 Datasheet - Page 314
L64105
Manufacturer Part Number
L64105
Description
Mpeg-2 Audio/video Decoder
Manufacturer
LSI Logic Corporation
Datasheet
1.L64105.pdf
(454 pages)
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9-22
Figure 9.11 Frequency Response B
Phase
Figure 9.12 Impulse Response B
The scale factor of the interpolator is the ratio between the widths of the
source image and the target image in 1/256th of a pixel increments. The
interpolator calculates the subpixel position to within 1/256th of a pixel
and chooses one of the eight filter banks closest to the calculated
location. The filter integrates a raster mapper that increments by n/256
each output pixel.
Table 9.6
popular source image resolutions. The general form for deriving the
raster mapper increment value is:
Video Interface
-0.05
0.05
-0.1
0.1
dB
0
-3.14
3.14
-15
-30
-45
-60
-75
shows the raster mapper increment for each of a number of
0
0
Increment
0.025
Frequency Response
Impulse Response
0.05
=
0.075
Source Width
----------------------------------- -
Target Width
0.1
0.125
256
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