Patent ID: 11948554
Assignee: NEC CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 2:
3. A pattern recognition device comprising:
a processor; and
a memory storing instructions executable by the processor to:
store, for each of a plurality of category hierarchies including a highest category hierarchy, predetermined parameters;
extract, for the highest category hierarchy, an acoustic feature from an acoustic pattern obtained as a result of processing on an acoustic signal, using parameters corresponding to the highest category hierarchy, the parameters learned based on a pair of a learning acoustic pattern obtained as a result of processing on a learning acoustic signal and a learning label representing a learning attribute of a learning source of the learning acoustic signal;
extract, for each category hierarchy other than the highest category hierarchy, the acoustic feature, using the predetermined parameters corresponding to the category hierarchy, from the acoustic feature extracted from the category hierarchy that is one level higher;
identify, for each category hierarchy, a label representing an attribute of the source of the acoustic signal and that is associated with the acoustic pattern is based, based on the acoustic feature.