Appeal No. 2004-1689
Application 09/912,132
normal video mode and a scaled video mode. In a normal video
mode, the frame buffer has three buffer areas for receiving full
size I, P, and B frames and in a scaled video mode the frame
buffer has five buffer areas, a first and second are for
receiving full size I and P frames and third, fourth, and fifth
areas for receiving scaled I, P, and B frames (e.g., col. 3,
lines 20-35; Fig. 6; col. 9, lines 31-33). Decoding and motion
compensation is performed on full resolution frames from an MPEG
input source by video decoder 54 and I and P pictures stored in
the memory buffer (col. 9, lines 47-67; col. 12, lines 14-16).
Decoded full-size macroblocks are received by the decimation
unit 82 where they may or may not be scaled and stored in the
frame buffers (col. 10, lines 46-54). Thus, Campisano does not
disclose performing motion compensation on a reduced resolution
frame. We next examine the up-scaling teachings of Campisano.
In a normal mode, decimation unit 82 outputs decoded data
full-size macroblocks to memory control unit 52 for storage in
frame buffers 53 (col. 10, lines 49-51) with B-coded pictures
preferably being decimated (col. 10, lines 4-8). In the scaling
mode, decimation unit 82 scales the full-size macroblocks and
outputs full-size macroblocks for I and P frames and scaled
macroblocks for I, P, and B frames to memory control unit 52 for
storage in frame buffers 53 (col. 10, lines 51-54). The frames
in the two modes are shown in Fig. 6. In the normal display
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