METHOD FOR IMPROVING ACOUSTIC MODEL, COMPUTER FOR IMPROVING ACOUSTIC MODEL AND COMPUTER PROGRAM THEREOF

摘要

Embodiments include methods and systems for improving an acoustic model. Aspects include acquiring a first standard deviation value by calculating standard deviation of a feature from first training data and acquiring a second standard deviation value by calculating standard deviation of a feature from second training data acquired in a different environment from an environment of the first training data. Aspects also include creating a feature adapted to an environment where the first training data is recorded, by multiplying the feature acquired from the second training data by a ratio obtained by dividing the first standard deviation value by the second standard deviation value. Aspects further include reconstructing an acoustic model constructed using training data acquired in the same environment as the environment of the first training data using the feature adapted to the environment where the first training data is recorded.

主权项

1. A method for improving an acoustic model, comprising:
acquiring, by a computer, a first standard deviation value by calculating standard deviation of a first feature from a first training data acquired in first environment; acquiring, by the computer, a second standard deviation value by calculating standard deviation of a second feature from second training data acquired in a second environment; calculating, by the computer, a modified first feature, by multiplying the second feature acquired from the second training data by a ratio obtained by dividing the first standard deviation value by the second standard deviation value; and reconstructing, by the computer, an acoustic model constructed using training data acquired in the first environment, using the modified first feature.