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In the deep neural network (DNN)-hidden Markov model (HMM), the DNN is mainly used for feature processing, while the HMM is mainly used for sequence modeling.
Correct Answer: A
In hybridDNN-HMMspeech recognition: * TheDNNacts as an acoustic model, transforming audio features into probability estimates for phonetic states. * TheHMMmodels the temporal sequence and transitions between phonetic states, handling time dependencies and variability in speech. This combination leverages the representational power of DNNs and the sequence modeling strengths of HMMs. Exact Extract from HCIP-AI EI Developer V2.5: "In DNN-HMM systems, the DNN outputs state posterior probabilities, and the HMM models the temporal sequence structure of speech." Reference:HCIP-AI EI Developer V2.5 Official Study Guide - Chapter: Hybrid Speech Recognition Models