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Patent Searching and Data


Title:
LEARNING DEVICE, LEARNING METHOD AND LEARNING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/151507
Kind Code:
A1
Abstract:
A learning device (10) includes: a feature amount extraction unit (11) that extracts a feature amount of a voice from voice data for learning; a probability calculation unit (12) that performs a prefix search using a voice recognition model represented by a neural network, on the basis of the voice feature amount, and calculates the posterior probability of a recognized character string to acquire a plurality of hypothetical character strings; an error calculation unit (13) which calculates an error according to a word error rate between the plurality of hypothetical character strings and a correct character string for learning, and which derives a parameter of an entire model that minimizes the expected value of the total sum of word error rate losses; and a parameter updating unit (14) that updates the model parameter in accordance with the parameter derived by the error calculation unit (13).

Inventors:
KARITA, Shigeki (9-11 Midori-cho 3-chome, Musashino-sh, Tokyo 85, 〒1808585, JP)
OGAWA, Atsunori (9-11 Midori-cho 3-chome, Musashino-sh, Tokyo 85, 〒1808585, JP)
DELCROIX, Marc (9-11 Midori-cho 3-chome, Musashino-sh, Tokyo 85, 〒1808585, JP)
NAKATANI, Tomohiro (9-11 Midori-cho 3-chome, Musashino-sh, Tokyo 85, 〒1808585, JP)
Application Number:
JP2019/003735
Publication Date:
August 08, 2019
Filing Date:
February 01, 2019
Export Citation:
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Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (5-1 Otemachi 1-chome, Chiyoda-ku Tokyo, 16, 〒1008116, JP)
International Classes:
G10L15/06; G10L15/16
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (Toranomon Mitsui Building, 8-1 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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