Appeal No. 2001-0565
Application No. 08/855,246
are in a virtual space, and they correspond to separate multicast
groups. The user joins or leaves a multicast group by
positioning the icon 207 within one of the regions (column 6,
lines 55 through 62; column 9, lines 16 through 23).
The examiner acknowledges (answer, page 5) that “Tomoda does
not explicitly teach the claimed limitation of streaming a first
base layer and a first at least one enhancement layer of said
data, said first at least one enhancement layer additive to said
first base layer.”
Chaddha discloses a base layer and first and second
enhancement layers, and “[c]ollectively the base layer, and first
and second enhancement layers comprise the single embedded
bitstream that may be multicast over heterogeneous networks
. . . .” (column 3, lines 21 through 26).
The examiner further acknowledges (answer, page 5) that
“Tomoda and Chaddha do not explicitly disclose the claimed
limitation wherein said first base layer is different from said
second base layer, and said first at least one enhancement layer
is different from said second at least one enhancement layer.”
In view of the noted teachings of Tomoda and Chaddha, and
the acknowledged shortcomings in the teachings of these
references, we find that the examiner’s conclusions (answer,
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