Appeal No. 2002-1453
Application No. 09/160,790
diagram shown in Figure 3. At step 315, it is determined whether
there is a mixed mode. If there is no mixed mode, then step 320
performs the IDCT using standard basis functions. If there is a
mixed mode, it is determined at step 325 if there is a frame-
mode. If there is a frame-mode, then at step 335 the system
performs IDCT using modified basis function. By using the flow
diagram shown in Figure 3, Appellant's invention avoids the error
introduced as discussed above. See pages 8-11 of Appellant's
specification.
Appellant's claim 1 is representative of the claimed
invention and is reproduced as follows:
1. A method for decoding a compressed image stream including
discrete cosine transform (DCT) coefficient blocks representative
of pixel blocks having a first resolution, said method comprising
the steps of:
resizing a DCT coefficient block, said resized DCT
coefficient block being representative of a pixel block having a
second resolution;
transforming, according to an inverse discrete cosine
transform (IDCT), said resized DCT coefficient block to produce
said pixel block having said second resolution, said step of
transforming utilizing DCT basis functions adapted in response to
an encoding mode of said DCT coefficient block.
Reference
The reference relied on by the Examiner is as follows:
Yonemitsu et al. 5,485,279 Jan. 16, 1996
(Yonemitsu)
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