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One In A Hundred: Select The Best Predicted Sequence from Numerous Candidates for Streaming Speech Recognition ...
Abstract: The RNN-Transducers and improved attention-based encoder-decoder models are widely applied to streaming speech recognition. Compared with these two end-to-end models, the CTC model is more efficient in training and inference. However, it cannot capture the linguistic dependencies between the output tokens. Inspired by the success of two-pass end-to-end models, we introduce a transformer decoder and the two-stage inference method into the streaming CTC model. During inference, the CTC decoder first generates many candidates in a streaming fashion. Then the transformer decoder selects the best candidate based on the corresponding acoustic encoded states. The second-stage transformer decoder can be regarded as a conditional language model. We assume that a large enough number and enough diversity of candidates generated in the first stage can compensate the CTC model for the lack of language modeling ability. All the experiments are conducted on a Chinese Mandarin dataset AISHELL-1. The results show that our ...
Keyword: Audio and Speech Processing eess.AS; FOS Electrical engineering, electronic engineering, information engineering
URL: https://dx.doi.org/10.48550/arxiv.2010.14791
https://arxiv.org/abs/2010.14791
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