Appeal 2007-1864
Application 10/100,717
STATEMENT OF THE CASE
Appellant invented a speech recognition method with improved
capability to recognize, among other things, hypo-articulated and hyper-
articulated speech. Specifically, a predicted speech value for a hypothesis
speech unit is determined using an articulatory dynamics value. In one
embodiment, the articulatory dynamics value depends on such a value at a
previous time and an articulation target. In another embodiment, the
articulatory dynamics value depends in part on acoustic environmental
values, such as noise and distortion values. And in another embodiment, a
time constant that defines the articulatory dynamics values is trained using a
variety of articulation styles.1 Claim 1 is illustrative:
1. A method of speech recognition, the method comprising:
receiving an observable value that describes a portion of a speech
signal;
identifying a predicted value for a hypothesis phonological unit using
an articulatory dynamics value that depends on an articulatory dynamics
value at a previous time and an articulation target; and
comparing the observed value to the predicted value to determine a
likelihood for the hypothesis phonological unit.
The Examiner relies on the following prior art reference to show
unpatentability:
Hutchins US 4,980,917 Dec. 25, 1990
1 See generally Specification 2:1 - 4:12.
2
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