InfoLED: Augmenting LED Indicator Lights for Device Positioning and Communication
summary
System encodes 16-bit payloads with Manchester coding plus a 10-bit preamble and two-bit hash, sends symbols at 120/s yielding 44.4 bits/s, and transmits via normal indicator LEDs using imperceptible high-frequency flicker. A smartphone camera at 240 fps with GPU-based block motion compensation and a sliding-window decoder locates and bipartite-matches up to 7 LEDs concurrently, decodes packets in ~0.5 s, tolerates one-bit errors, and reliably works to 7 m indoors (6 m dark, 3 m outdoor) while not disrupting human-readable colors/patterns.
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chapters (7)
- 0:00Introduction to InfoLED
- 1:51Designing InfoLED encoding
- 4:18InfoLED scanner pipeline
- 11:09Evaluating InfoLED performance
- 13:38InfoLED applications
- 14:42System recap and demo
- 15:48Q&A session
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