Compressed finite state transducers for automatic speech recognition

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United States of America Patent

PATENT NO 9865254
SERIAL NO

15187102

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Abstract

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Compact finite state transducers (FSTs) for automatic speech recognition (ASR). An HCLG FST and/or G FST may be compacted at training time to reduce the size of the FST to be used at runtime. The compact FSTs may be significantly smaller (e.g., 50% smaller) in terms of memory size, thus reducing the use of computing resources at runtime to operate the FSTs. The individual arcs and states of each FST may be compacted by binning individual weights, thus reducing the number of bits needed for each weight. Further, certain fields such as a next state ID may be left out of a compact FST if an estimation technique can be used to reproduce the next state at runtime. During runtime portions of the FSTs may be decompressed for processing by an ASR engine.

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Patent Owner(s)

Patent OwnerAddress
AMAZON TECHNOLOGIES INCPO BOX 81226 SEATTLE WA 98108-1226

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Filimonov, Denis Sergeyevich Seattle, US 7 76
Joseph, Shaun Nidhiri Somerville, US 4 144
Rastrow, Ariya Seattle, US 47 1177
Tiwari, Gautam Boston, US 7 149

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