What is the difference between a dialog state tracker and an SLU (spoken language understanding) system?


What is the difference between a dialog state tracker and an SLU (spoken language understanding) system?

A “dialog state tracker” is like a hypothetical device, or more accurately a component, representing an unsolved problem.

An SLU (spoken language understanding) system means to me an acoustical device that interfaces with, or translates to, a textual NLP (natural language processing) engine.  However, “language understanding” is also an unsolved problem.  The acoustic part is essentially solved; it’s the NLP understanding part that is not solved.

A “dialog state tracker” represents an additional component within this ecosystem.  Essentially, a “dialog state tracker” would link the present with past and future dialog states, in other words keeping the darn thing on topic across time.

See also my Quora answers to:

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