International Business Machines Corporation

Oki Data Corporation

Fujikura Limited

Ddk Ltd.

Masayuki Suzuki

Junichi Ito

Hisatoshi Saito

Mitsuhiro Kawata

Takashi Fukuda

Gakuto Kurata

Toru Nagano

Yuki Ishida

Harunori Urai

A method, computer system, and a computer program product for audio data augmentation are provided. Sets of audio data from different sources may be obtained. A respective normalization factor for at least two sources of the different sources may be calculated. The normalization factors from the at least two sources may be mixed to determine a mixed normalization factor. A first set of the sets may be normalized by using the mixed normalization factor and to obtain training data for training an acoustic model.

Acoustic data augmentation with mixed normalization factors

An approach for improving speech recognition is provided. A processor receives a new word to add to a prefix tree. A processor determines a bonus score for a first transition from a first node to a second node in a prefix tree on condition that the first transition is included in a path of at least one transition representing the new word. A processor determines a hypothesis score for a hypothesis that corresponds to a speech sequence based on the prefix tree, where the hypothesis score adds the bonus score to an initial hypothesis score to determine the hypothesis score. In response to a determination that the hypothesis score exceeds a threshold value, a processor generates an output text sequence for the speech sequence based on the hypothesis.

Adding words to a prefix tree for improving speech recognition

Image drum cartridge

Toner cartridge

Growing community of inventors

Tokyo, Japan

Masayuki Suzuki