C5W3L10 Trigger Word Detection | Summary and Q&A

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February 5, 2018
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DeepLearningAI
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C5W3L10 Trigger Word Detection

TL;DR

Learn how to build a trigger word detection system using deep learning and sequence models, allowing you to activate devices or perform actions by saying specific words.

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Key Insights

  • 🛝 Deep learning and sequence models have simplified trigger word detection systems to just a single slide explanation.
  • 🔑 Trigger word systems have become increasingly popular with devices like Amazon Echo, Apple Siri, and Google Home.
  • 👋 The development of trigger word detection algorithms is still ongoing, with no widely accepted best algorithm.
  • ⌛ An imbalanced training set can be addressed by outputting multiple ones over a fixed period of time after the trigger word is spoken.

Transcript

you've now learned so much about deep learning and sequence models that we can actually describe a trigger word system quite simply just on one slide as you see in this video but when the rise of speech recognition have been more and more devices you can wake up with your voice and those are sometimes called trigger word detection systems so let's ... Read More

Questions & Answers

Q: What is a trigger word detection system?

A trigger word detection system uses deep learning and sequence models to identify specific words or phrases spoken by the user and activate devices or perform actions accordingly.

Q: How do trigger word systems like Amazon Echo and Apple Siri work?

When a device like Amazon Echo or Apple Siri detects a trigger word (e.g., "Alexa" or "Hey Siri"), it wakes up and listens for further commands or queries from the user.

Q: Is there a consensus on the best algorithm for trigger word detection?

No, there is no wide consensus yet on the best algorithm for trigger word detection, as the literature is still evolving in this area.

Q: How do you label the target labels for training a trigger word detection system?

In the training set, target labels are set to zero before the trigger word is spoken and then set to one right after the trigger word is spoken.

Summary & Key Takeaways

  • Deep learning and sequence models have made it possible to create trigger word detection systems that can wake up devices using specific words.

  • Examples of trigger word systems include Amazon Echo (Alexa), Apple Siri (Hey Siri), and Google Home (Okay Google).

  • The literature on trigger word detection algorithms is still evolving, but one example involves using audio features and RNNs to identify the trigger word and set target labels.

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