Reexamination Control No. 90/005,742
Patent 5,253,341
1 have asymmetric processing power requirements and thus take advantage of the asymmetrical
2 processing power of the server and EUS:
3 The EUS provides appropriate inverse processing (e.g. data
4 decompression) which, by its nature, requires relatively little processing
5 power to accomplish. Thus, the method of this invention exploits an
6 inherent asymmetry in the overall process . . . where most of the
7 processing power and global scheduling is performed by the Server.
8
9 Id.; abstract. Thus, the first of these two quoted sentences refers to the compression and inverse
10 decompression techniques selected for use in the EUS rather than to all compression and inverse
11 decompression techniques.
12 For the foregoing reasons, we agree with Dr. Koopman that the term "asymmetric" in
13 claim 101 means that the inverse decompression technique requires less processing power that
14 does the compression technique. The examiner does not contend that all inter-frame differential-
15 pulse-code-modulation compression techniques and inverse decompression techniques are
16 necessarily asymmetric. Instead, he argues that "as the data receiving station (12 [sic, 14]) in
17 Walter would not be expected to have the processing power of the host computer (20), the use of
18 asymmetric compression is inherent for real-time display of video." Answer at 204-05, para.
19 397. While we agree that Walter’s data receiving station would not be expected to have the
20 processing power of host computer 20, the examiner has not explained, and it is not apparent to
21 us, why it necessarily follows that the use of asymmetric compression is inherent for real-time
22 display of video. The examiner has not explained and it is not otherwise apparent, why Walter’s
23 system cannot achieve real-time display using symmetrical inter-frame differential-pulse-code-
24 modulation techniques to effect compression and inverse decompression. Accordingly, we are
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