US 7,321,853 B2 | ||
Speech recognition apparatus and speech recognition method | ||
Yasuharu Asano, Kanagawa (Japan) | ||
Assigned to Sony Corporation, Tokyo (Japan) | ||
Filed on Feb. 24, 2006, as Appl. No. 11/362,331. | ||
Application 11/362331 is a continuation of application No. 10/451285, granted, now 7,031,917, previously published as PCT/JP02/10868, filed on Oct. 21, 2002. | ||
Claims priority of application No. P2001-323012 (JP), filed on Oct. 22, 2001. | ||
Prior Publication US 2006/0143006 A1, Jun. 29, 2006 | ||
Int. Cl. G10L 15/08 (2006.01) |
U.S. Cl. 704—238 [704/231; 704/243] | 4 Claims |
1. A speech recognition apparatus for recognizing an input speech, comprising:
distance from the microphone calculation means for determining the distance to a sound source of said speech;
storage means for storing plural sets of acoustic models produced from speech uttered by sound sources located at different
distances;
acquisition means for selecting tap coefficients for realizing an inverse filter having a frequency characteristic corresponding
to the distance determined by the distance calculation means, from the plural sets of acoustic models for various distances
stored in the storage means;
filter means for filtering said speech using the tap coefficients acquired by the acquisition means; and
speech recognition means for recognizing said speech filtered by the filter means, on the basis of a particular set of acoustic
models.
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