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arxiv: 1508.01211 · v2 · submitted 2015-08-05 · 💻 cs.CL · cs.LG· cs.NE· stat.ML

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Listen, Attend and Spell

William Chan , Navdeep Jaitly , Quoc V. Le , Oriol Vinyals
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classification 💻 cs.CL cs.LGcs.NEstat.ML
keywords modelnetworkcharactersachievesattendcomponentslanguagelearns
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We present Listen, Attend and Spell (LAS), a neural network that learns to transcribe speech utterances to characters. Unlike traditional DNN-HMM models, this model learns all the components of a speech recognizer jointly. Our system has two components: a listener and a speller. The listener is a pyramidal recurrent network encoder that accepts filter bank spectra as inputs. The speller is an attention-based recurrent network decoder that emits characters as outputs. The network produces character sequences without making any independence assumptions between the characters. This is the key improvement of LAS over previous end-to-end CTC models. On a subset of the Google voice search task, LAS achieves a word error rate (WER) of 14.1% without a dictionary or a language model, and 10.3% with language model rescoring over the top 32 beams. By comparison, the state-of-the-art CLDNN-HMM model achieves a WER of 8.0%.

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