Appeal No. 2004-1689
Application 09/912,132
mode, full-size scan lines are retrieved from the buffer
storage 53 and fed through the decimation unit 82 where B frames
are re-expanded for display and the other scan lines for I and P
frames are unchanged (col. 10, line 60, to col. 11, line 5). It
appears from the arrow from 82 to 84 that the full-size scan
lines are fed into the scan line video buffers 84 and then to
vertical and horizontal up-sample logic 94. In a scaling display
mode, scaled scan lines are retrieved from frame buffer storage
53 and fed into scan line video buffers 84 to vertical and
horizontal up-sample logic 94 (col. 11, lines 6-12). "Upsample
controls are received from display fetch unit 92, which
coordinates letterbox formatting, SIF upsampling, 4:2:0 to 4:2:2
upsampling, and flicker reduction (in accordance with the
principles of the above-incorporated [U.S. Patent 5,973,740])."
(Col. 11, lines 12-17). (Note the control line from unit 92 to
up-sample logic 94.) It appears that up-sampling is performed
for both normal (full-size) and scaled lines. As explained in
U.S. Patent 5,973,740 ('740 patent), referred to by its
application number in Campisano, up-sampling might be to change
material that is encoded in a 16:9 aspect ratio into a
conventional 4:3 aspect ratio by expanding in a 12:16 rate ('740
patent, col. 12, line 62, to col. 13, line 2; col. 13,
lines 17-18). A 4:3 aspect ratio can be converted to a 16:9
aspect ratio by down-sampling the vertical samples by 3/4 ('740
- 8 -
Page: Previous 1 2 3 4 5 6 7 8 9 10 Next
Last modified: November 3, 2007