Appeal No. 2001-1312
Application No. 08/989,701
fitting the model using both frequency and phase measurements.
According to Appellants (specification, page 4), the use of a
quadratic phase model reduces the computation requirements of the
conventionally used cubic phase interpolation algorithm.
Claim 2 is illustrative of the invention and reads as
follows:
2. A method for synthesizing music and/or speech sound
signals using sinusoidal modeling, comprising the steps of:
measuring frequency and phase values at frame
boundaries t = ti and t = ti+1 (O < i < N) for N data frames
of interval length T of a sampled signal;
modeling phase and frequency functions for the ith
data frame using a quadratic phase model 2i(J)=ai+biJ+ciJ2,
Ti(J)=bi+2ciJ, where J = t - ti;
determining polynomial coefficients ai, bi, ci assuming
unwrapped phase and frequency are continuous at frame
boundaries, and determining unknowns by minimizing a square
error function; and
synthesizing said music and/or speech sound signals
from said model and coefficients.
As the sole rejection by the Examiner before us, claims 2-8
stand finally rejected under 35 U.S.C. § 112, first paragraph, as
being based on an inadequate disclosure.
2
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