espnet.nets.ctc_prefix_score.CTCPrefixScore

source

class espnet.nets.ctc_prefix_score.CTCPrefixScore(x, blank, eos, xp)

Bases: object

Compute CTC label sequence scores

which is based on Algorithm 2 in WATANABE et al. “HYBRID CTC/ATTENTION ARCHITECTURE FOR END-TO-END SPEECH RECOGNITION,” but extended to efficiently compute the probablities of multiple labels simultaneously

initial_state()

Obtain an initial CTC state

• Returns: CTC state