TinySpeech: Attention Condensers for Deep Speech Recognition Neural Networks on Edge Devices

• URL: http://arxiv.org/abs/2008.04245v6
• Date: Mon, 12 Oct 2020 19:07:39 GMT
• Title: TinySpeech: Attention Condensers for Deep Speech Recognition Neural Networks on Edge Devices
• Authors: Alexander Wong, Mahmoud Famouri, Maya Pavlova, and Siddharth Surana
• Abstract summary: We introduce the concept of attention condensers for building low-footprint, highly-efficient deep neural networks for on-device speech recognition on the edge. To illustrate its efficacy, we introduce TinySpeech, low-precision deep neural networks tailored for on-device speech recognition.
• Score: 71.68436132514542
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Advances in deep learning have led to state-of-the-art performance across a multitude of speech recognition tasks. Nevertheless, the widespread deployment of deep neural networks for on-device speech recognition remains a challenge, particularly in edge scenarios where the memory and computing resources are highly constrained (e.g., low-power embedded devices) or where the memory and computing budget dedicated to speech recognition is low (e.g., mobile devices performing numerous tasks besides speech recognition). In this study, we introduce the concept of attention condensers for building low-footprint, highly-efficient deep neural networks for on-device speech recognition on the edge. An attention condenser is a self-attention mechanism that learns and produces a condensed embedding characterizing joint local and cross-channel activation relationships, and performs selective attention accordingly. To illustrate its efficacy, we introduce TinySpeech, low-precision deep neural networks comprising largely of attention condensers tailored for on-device speech recognition using a machine-driven design exploration strategy, with one tailored specifically with microcontroller operation constraints. Experimental results on the Google Speech Commands benchmark dataset for limited-vocabulary speech recognition showed that TinySpeech networks achieved significantly lower architectural complexity (as much as $507\times$ fewer parameters), lower computational complexity (as much as $48\times$ fewer multiply-add operations), and lower storage requirements (as much as $2028\times$ lower weight memory requirements) when compared to previous work. These results not only demonstrate the efficacy of attention condensers for building highly efficient networks for on-device speech recognition, but also illuminate its potential for accelerating deep learning on the edge and empowering TinyML applications.

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