174: It's Not Weird
Evan Shapiro, CTO and co-founder of Knit Health, explains how his company uses a custom Linux-based camera with an onboard Qualcomm Snapdragon processor and deep learning neural networks to monitor infant sleep and respiration without wearable sensors. He details the engineering challenges of extracting weak respiration signals from noisy video, the decision to process data locally on the edge to preserve privacy and reduce cloud costs, and the rigorous security measures implemented to prevent hacking. Shapiro also discusses the history of neural networks, the 'Wizard of Oz' method used to train their models before having sufficient data, and his background as a professional poker player.