Appeal No. 2003-0556
Application 09/185,248
diverse formats mixed by digital mixers, the analog sources of
data are first digitized after they have been mixed for
subsequent common mixing by the digital mixers of Alexander to
yield a mixed digital audio output stream. PCM data is
bidirectionally exchanged in Alexander as best represented in
Figure 1B which is representative of the broader showing in
Figure 1A. The focus of this reference is a CODEC (Figure 2A),
a feature also suggested in Bergher as well as shown in the far
right corner of Farhangi's Figure 2 teaching to provide an analog
output. Thus, the additional reliance upon Hinderks is
cumulative for the teachings of a CODEC. Note also the teachings
in Figure 2A of Alexander and the use of a well-known AC'97
digital controller and related circuitry which is what appellants
have disclosed as well to be known in the art. See specification
page 1. Alexander's digital mixer system 300 is shown in various
embodiments in Figures 3A-3C.
We have also indicated earlier that it appears that the
input processor discussion at the first column of 571 of Bergher
would have indicated to the artisan that the inputted, coded data
would have been decoded to give a common or consistent PCM data
stream (Figure 2) for processing by the DSP core structure shown
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