Towards Battery-Free HD Video Streaming
summary
Claims a camera that streams HD while drawing under a milliwatt by feeding raw sensor voltages straight to an antenna using analog video backscatter and recovering video with a hub. A comparator plus triangle wave converts pixels to pulse-width modulation, zigzag scanning and super-pixel averaging cut bandwidth and shift compression to the hub. Simulated ASIC uses 321 μW for 720p@60fps and 806 μW for 1080p@60fps, harvests enough RF to sustain 30fps 1080p to ~8 ft, and a prototype backscatters 720p at 10fps to 16 ft.
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chapters (19)
- 0:00Intro
- 0:28Snap Spectacle
- 1:04Nest Camera
- 1:28Grand Challenge
- 2:00Challenge: Video Streaming is Power Hungry
- 3:06We Take Inspiration from the Great Seal Bug
- 4:15Contributions
- 5:06Recorded Demo
- 5:47Real-Time Demo
- 6:08Demo 2
- 7:43Technical Challenges
- 8:56Solution 1: Inspiration from Human Brain Signals
- 10:23Our Intra-Frame Compression
- 11:22Our Inter-Frame Compression Algorithm
- 13:10Implementation
- 15:26Evaluation: HD Video Quality (Mobility)
- 16:09Evaluation: Inter-Frame Compression Algorithm
- 17:09Evaluation: Power Consumption
- 18:54Trade-off and Road Ahead
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