Appeal No. 1997-3269
Application 07/918,519
have M/2 levels (represented as even integers from 0 to M-2).
The M/2 level values are created by rounding to the M level
value to the nearest multiple of 2, one of the M/2 level
values being created by rounding up and the other by rounding
down. Appellants depict the correlation between M level
values and M/2 level values in Table 1 on page 10 of the
specification. Thus, the average of the two M/2 level values
is the same as the original M level value. Appellants
identify on page 16 of the specification that this encoding
technique can be used to reduce a 9 bit value to a 8 bit
value, as shown in table 2. On pages 17 and 18 of the
specification, Appellants also identify that the encoding
technique can be used for 10 bit to 8 bit encoding by
converting a M level value into four values of M/4 levels as
shown in table 3. On page 18 of the specification, Appellants
identify that the four M/4 level quantizations can be used on
the four stored non-dependent representative images, BASE,
BASE/4, and two BASE/16, such that each image has a different
M/4 quantization. Appellants identify on page 19 of the
specification that if an image of spatial size BASE, BASE/4,
or BASE/16 is to be produced at higher resolution (more than 8
3
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