Appeal 2007-0018
Application 10/107,262
The next question is: Is using the frequency control word in
Hu "decoding a sine and cosine instruction"? The examiner equates
"decoding a sine and cosine instruction" to "utilizing the frequency control
word." While the claims are to be given their broadest reasonable
interpretation, we do not agree with this interpretation. An "instruction" is a
statement indicating the operation a machine is to perform and claim 1
recites "decoding a sine and cosine instruction" and then "executing said sine
and cosine instruction using said sine and cosine value pair." The frequency
control word in Hu is a piece of data representing an incremental phase
value: a piece of data it is not technically an "instruction" to execute a
certain sine/cosine operation. A phase value itself does not indicate a
sine/cosine operation: the operation is determined by the particular values
stored in the LUT, not by an instruction. Furthermore, changing the
frequency of the output sine and cosine waves in Hu is not "executing said
sine and cosine instruction using said sine and cosine value pair." Still
further, "decoding" an instruction requires some positive step, usually using
bits of the instruction to generate timing and control signals to carry out the
operation specified by the instruction, which is not satisfied by merely using
a data value. The anticipation rejection of claims 1-30 is reversed.
Hu is clearly a very relevant reference, as recognized by the examiner.
Hu discloses reducing the size of the ROM look-up table by a factor of four
by taking advantage of the quadrature symmetry of the sine and cosine
functions, as in the disclosed invention (¶ 0011), and uses quadrant bits (the
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