A Micropower Analog VLSI HMM State Decoder for Wordspotting

We describe the implementation of a hidden Markov model state decoding system, a component for a wordspotting speech recognition system. The key specification for this state decoder design is microwatt power dissipation; this requirement led to a continuoustime, analog circuit implementation. We describe the tradeoffs inherent in the choice of an analog design and explain the mapping of the discrete-time state decoding algorithm into the continuous domain. We characterize the operation of a 10-word (81 state) state decoder test chip.

• Type: Conference
• Year: 1996
• Where: NIPS
• Authors: John Lazzaro, John Wawrzynek, Richard Lippmann
• Keywords: NIPS 1996, NIPS 2007, State Decoder, State Decoder Design, State Decoding System