Figure 5
From: Phoneme and Sentence-Level Ensembles for Speech Recognition
Single-path multistream decoding for two vocabulary words consisting of two phonemes each. When there is only one expert, the decoding process is done normally. In the multiple-expert case, phoneme models from each expert are connected in parallel. The transition probabilities leading from the anchor states to the hidden Markov model corresponding to each experts are the weights 
of each expert.