Appeal No. 1997-3269
Application 07/918,519
The invention relates to an apparatus for quantizing a
digital image. On page 7 of the specification, Appellants
identify that the invention is to reduce the quantization
error in decoding images without increasing the storage
requirements. Appellants identify on pages 13 and 14 of the
specification that the system can create images of different
spatial resolution (i.e., different numbers of pixels). These
images are titled 16BASE, 4BASE, BASE, BASE/4 and BASE/16.
The 16BASE and 4BASE images are stored as residual dependent
representation images, and the BASE, BASE/4, and two BASE/16
images are stored as non-dependent representative images. On
page 2 of the specification, Appellants define a “non-
dependent” representation as “a component of a hierarchy that
does NOT require additional information (from other
representations stored in the hierarchy) for display.”
Appellants further identify on page 15 of the specification
that the quantization of non-dependent images can be encoded.
On pages 10 and 11 of the specification, Appellants describe
that the method of encoding the quantization values is such
that a quantization value which can have M levels (represented
by an integer 0 to M-1) is encoded into two values which can
2
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