Learning apparatus, feature value conversion apparatus, learning method and program

A feature conversion device comprising:

• an acquirer that acquires a student model from a learning device including a teacher model that includes a first encoder and a first decoder including a first recurrent neural network, the student model that includes a second encoder and a second decoder including a second recurrent neural network, and a learning controller that performs learning of the teacher model by using a sequence-to-sequence machine learning method and performs learning of the student model by using a knowledge distillation method from the teacher model;
• and
• a converter that converts an input feature sequence into a target feature sequence using the student model.

A learning method performed by a learning device, the learning method comprising:

• performing learning of a teacher model that includes a first encoder and a first decoder including a first recurrent neural network by using a sequence-to-sequence machine learning method;
• and
• performing learning of a student model that includes a second encoder and a second decoder including a second recurrent neural network by using a knowledge distillation method from the teacher model.

(canceled)