recognition

Comparative to the training, recognition is much simpler and the procedure is given below.

(1)

Take an observation sequence to be recognized and

• Calculate the forward and backward probabilities for each HMM, using the recursions 1.5 and 1.2.
• As in the equation 1.53 calculate the likelihoods,
• The recognized class , to which the observation sequence belongs, is given by

  

(3)

Go to step (2), unless all the observation sequences to be recognized are considered.

The recognition rate in this case can be calculated as the ratio between number of correctly recognized speech units and total number of speech units (observation sequences) to be recognized.

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