Problem 1: Viterbi Decoding

The matrices are shown above, and i have tested the images in multiple browsers.

(a) Using the matrices given, compute by hand the Viterbi trellis and back pointer matrix for the sentence I got nice gifts. (3pts)

(b) What is the most likely sequence of tags? (1pt)

State Transition Probabilities (A array) Observation Likelihoods (B array) gifts .02 VBDNNS PRP got .05 nice VBD NNS PRP .05 0001 .2 .02 VBD NNS PRP 007 002 001 001 002 001 001 .05 .05 State Transition Probabilities (A array) Observation Likelihoods (B array) gifts .02 VBDNNS PRP got .05 nice VBD NNS PRP .05 0001 .2 .02 VBD NNS PRP 007 002 001 001 002 001 001 .05 .05