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Deep Learning for Joint Source-Channel Coding of Text

Citation Author(s):
Nariman Farsad, Milind Rao, and Andrea Goldsmith
Submitted by:
Milind Rao
Last updated:
13 April 2018 - 11:22am
Document Type:
Presentation Slides
Document Year:
2018
Event:
Presenters:
Milind Rao
Paper Code:
3599
Categories:
 

We consider the problem of joint source and channel coding of structured data such as natural language over a noisy channel. The typical approach inspired by information theory to this problem involves performing source coding to first compress the text and then channel coding to add robustness while transmitting across the channel; this approach is optimal with arbitrarily large block lengths for discrete memoryless channels. Given documents of finite length and limitations on the length of the encoding, we achieve lower word error rates by developing a deep learning based encoder and decoder. While the information theoretic approach would minimize bit error rates, our approach preserves semantic information of sentences by first embedding sentences in a semantic space where sentences closer in meaning are located closer together, and then performing joint source and channel coding on these embeddings.

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