# 38 then expand rt to get 939 rt t t

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Unformatted text preview: mber of forward messages needed for each subsegment is R(T /b). Prof. Jeﬀ Bilmes EE596A/Winter 2013/DGMs – Lecture 9 - Feb 6th, 2013 page 9-44 (of 180) k-best without the penalty Island Summary Scratch Time Cost Multiple redundant forward messages but only one sweep of backwards messages (unfortunately, forward messages are often more expensive for DGMs). Given a length T segment, we need to do R(T ) forward messages in total. We must at least do T forward messages Must also do (b − 1) forward sweeps through each of the top-level subsegments of length T /b, and the number of forward messages needed for each subsegment is R(T /b). recurrence relationship: R(T ) = T + (b − 1) ∗ R(T /b). Prof. Jeﬀ Bilmes EE596A/Winter 2013/DGMs – Lecture 9 - Feb 6th, 2013 (9.37) page 9-44 (of 180) k-best without the penalty Island Summary Scratch Time Cost - Solving the Recurrence To solve it, we can simplify by bounding R(T ) as follows R(T ) &lt; T + b ∗ R(T /b) Prof. Jeﬀ Bilmes EE596A/Winter 2013/DGMs – Lecture 9 - Feb 6th, 2013 (9.38) page 9-45 (of 180) k-best without the penalty Island Summary Scrat...
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## This document was uploaded on 04/05/2014.

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