Reexamination Control No. 90/005,742
Patent 5,253,341
1 spatial encoding, i.e., coding that takes into account only states of points which are
2 geographically adjacent to each point to be coded and belong to the same television frame as the
3 point to be coded. Id. at col. 3, ll. 41-44; col. 1, ll. 39-45; col. 4, ll. 6-54. Catros's improved
4 encoding system, depicted in Figures 2-9, on which the examiner specifically relies, employs the
5 coding method of Figure 1 and additional coding structures composed of predictors and
6 quantizers having different characteristics, each structure being employed as a function of the
7 local environment of each image point to be coded, specifically whether the point being encoded
8 is in an image contour areas or highly textured image area or in a uniform or slightly textured
9 area. Id. at col. 4, ll. 55-67. The passage on which the examiner specifically relies explains that
10 one of the coding structures is "[a]n inter-frame temporal or time predictor which takes into
11 consideration the state of a number of points located in different frames." Id. at col. 5, ll. 2-4.
12 Dr. Koopman contends it would have been unobvious to use Catros's inter-frame
13 differential encoding in Pocock because such encoding is designed for use with successive
14 television frames containing similar images, whereas Pocock transmits still-frame video images.
15 2d Koopman Decl. at 196, para. 430. The examiner's response (Final Action at 227-28, para.
16 430; Answer at 216, para. 430) to paragraph 430 of Dr. Koopman's testimony fails to address the
17 merits of this argument, which argument strikes us as having merit in the still-frame vis-à-vis
18 movie context. We are accordingly reversing the rejection of claim 95 for obviousness over
19 Pocock in view of Catros. 52
52 The examiner has not argued, and we have therefore not considered, the obviousness
of using the spatial (i.e., intra-frame) encoding technique described as prior art in Catros to
compress Pocock’s still-frame video images.
- 76 -
Page: Previous 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 Next
Last modified: November 3, 2007