TY - GEN
T1 - Poster
T2 - 20th ACM Annual International Conference on Mobile Computing and Networking, MobiCom 2014
AU - Ramirez, David
AU - LiKamWa, Robert
AU - Holloway, Jason
N1 - Publisher Copyright:
© 2014 by the Association for Computing Machinery, Inc. (ACM).
PY - 2014/9/7
Y1 - 2014/9/7
N2 - Screen-to-camera visible-light communication links are fundamentally limited by inter-symbol interference, in which the camera receives multiple overlapping symbols in a single capture exposure. By determining interference constraints, we are able to decode symbols with multi-bit depth across all three color channels. We present Styrofoam, a coding scheme which optimally satisfies the constraints by inserting blank frames into the transmission pattern. The coding scheme improves upon the state-of-the-art in camera-based visiblelight communication by: (1) ensuring a decode with at least halfexposure of colored multi-bit symbols, (2) limiting decode latency to two transmission frames, and (3) transmitting 0.4 bytes per grid block at the slowest camera's frame rate. In doing so, we outperform peer unsynchronized VLC transmission schemes by 2:9x. Our implementation on smartphone displays and cameras achieves 69:1 kbps.
AB - Screen-to-camera visible-light communication links are fundamentally limited by inter-symbol interference, in which the camera receives multiple overlapping symbols in a single capture exposure. By determining interference constraints, we are able to decode symbols with multi-bit depth across all three color channels. We present Styrofoam, a coding scheme which optimally satisfies the constraints by inserting blank frames into the transmission pattern. The coding scheme improves upon the state-of-the-art in camera-based visiblelight communication by: (1) ensuring a decode with at least halfexposure of colored multi-bit symbols, (2) limiting decode latency to two transmission frames, and (3) transmitting 0.4 bytes per grid block at the slowest camera's frame rate. In doing so, we outperform peer unsynchronized VLC transmission schemes by 2:9x. Our implementation on smartphone displays and cameras achieves 69:1 kbps.
KW - Camera synchronization
KW - Mobile systems
KW - Visible light communications
UR - http://www.scopus.com/inward/record.url?scp=84907811869&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907811869&partnerID=8YFLogxK
U2 - 10.1145/2639108.2642901
DO - 10.1145/2639108.2642901
M3 - Conference contribution
AN - SCOPUS:84907811869
T3 - Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM
SP - 405
EP - 407
BT - MobiCom 2014 - Proceedings of the 20th Annual
PB - Association for Computing Machinery
Y2 - 7 September 2014 through 11 September 2014
ER -