Continuous speech recognition model based on CTC Technology

In end to end speech recognition, the linguistic knowledge such as pronunciation 1exicon is not essential. And therefore, the performance of the ASR systems based on CTC is weaker than that of the baseline, aiming at this problem, a strategy combining the existing linguistic knowledge and the acoustic modeling based on CTC is proposed and the tri— phone is taken as the basic units in acoustic modeling, Thus the sparse problem of the modeling unit is effectively solved and the discrimination and robustness of the CTC model are improved substantially.