Voice recognition device
专利汇可以提供Voice recognition device专利检索，专利查询，专利分析的服务。并且PURPOSE: To enable recurrence formula calculation even at the time of recognition in the presence of a noise by providing a voice recognizing means by a DP matching system where a beam search is introduced, a means which estimate the ambient noise level, and a means which determines a beam width factor as a function of the noise level and finding the threshold value of a cumulative distance by the recurrence formula calculation.
CONSTITUTION: The recurrence formula calculation by DP matching is performed in synchronism with an input pattern A and a time base (i) and the cumulative distance g
n (i,j) of all standard patterns (n) at time (d) is found at time (i). The beam width factor a is represented as α (z)=a
0 ×(z/z
0 ) as the function of the ambient noise level (z). Here, α
0 is the best beam width factor corresponding reference noise level, (z) is the noise level when a voice is inputted, and z
0 is the reference noise level. A beam search decision part 60 decides whether or not specific requirements are met according to the threshold value θ(i) received from a beam width determination part 50 and the cumulative distance g
n (i,j) received from a recurrence formula calculation part 100, and sends the result to a control part 10 as a signal b
1 . A recognition result decision part 110 receives an extent of difference D(n,j
n ) from each word (n) from the recurrence formula calculation part 100 and determines and outputs the minimum D(n,j
n ) as a recognition result.
COPYRIGHT: (C)1992,JPO&Japio，下面是Voice recognition device专利的具体信息内容。
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