Appeal No. 1999-0487
Application No. 08/554,425
determining a value “for the sampled N frames of video data.”
The sequence and the sampled frames of these claims clearly
refers back to the sequence of angiographic images set forth
in the preamble of the claim. Therefore, claims 1 and 7 give
life to the preamble and require that the image data be a
sequence of angiographic images. The fact that appellant’s
specification indicates that the invention is not limited to
angiographic images cannot alter the clear language of claims
1 and 7 which restricts the data to a sequence of angiographic
images.
More importantly, appellant’s invention is based on the
discovery that sequential angiographic images and certain
other types of images have the unusual property that within a
predetermined range of quantization values, the average
compression ratio varies linearly with respect to the
quantization factor. Contrary to the examiner’s assertion,
this relationship does not exist for all sequential image
data. It is the discovery of this relationship with respect
to certain types of image data which allows a quantization
value to be determined
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