Appeal No. 2002-1961
Application No. 09/133,430 Page 4
turns to Owada for a teaching of compression coding another field
of the input progressive signal using differential data between
the one field and the another field, where the one field and the
another field are of the same frame. According to the examiner
(answer, page 5):
Therefore, it is considered obvious that one
skilled in the art at the time of the invention
would recognize the advantage of using differential
data between the one field and the another field,
wherein the field and the another field are of the
same frame, and would be motivated to look to Owada
et al. to provide the claimed compression of the
other field from the same frame for the same purpose
of maintaining a uniform transmitting rate, thereby
preventing a degradation of the quality of the image.
The examiner additionally asserts (answer, page 8) that claim 1
is met by selecting intra-frame coding of a difference signal.
Appellants assert (brief, page 3) that "neither of the
references teaches or suggests compression coding one field of a
frame and then compression coding the other field of the same
frame using differential data between the one field and the
another field, as required by independent claims 1, 3 and 4."
Appellants further argue (brief, pages 5 and 6) that Owada
teaches using either intra-frame encoding or inter-frame
encoding, and that in intra-frame encoding, a frame is divided
into blocks and the blocks are transformed into co-efficients
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