Appeal No. 1999-1793
Application 08/161,798
This is a decision on appeal under 35 U.S.C. § 134 from the
final rejection of claims 4-7, 9-12, 14-17, and 19-23. Claims 8, 13,
18, and 24 are allowed. Claims 1-3 are canceled.
We reverse.
BACKGROUND
The disclosed invention relates to a dynamic bit allocation
method that is adapted to the human auditory system and yet has a low
level of complexity. The complexity is reduced by allocating an
initial bit number using approximations made in a mathematical model
before the remaining bit numbers are allocated by a precise iterative
process.
Claim 5 is reproduced below.
5. A method of determining a bit allocation for a
quantization of digital audio signals having spectral and
temporal structure wherein the digital audio signals are
obtained by buffering audio signals in frames and decomposing
the digital signals into spectral components, which comprises
the steps of:
a step for dividing at least one frequency interval into a
plurality of frequency-units;
a step for obtaining a representative of each
frequency-unit obtained;
a step for counting a number of available frequency-units
by using the representative, based on psychoacoustic criteria;
a first bit allocation step for determining an initial bit
allocation for each of said available frequency-units by using
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