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We propose rolling-shutter (RS)-based asynchronous optical camera communication (OCC) with a variable symbol rate based on a cycle pattern of the receiver’s symbols which is uniquely determined by the ratio of the line interval of RS to the transmitter’s symbol length. RS-based asynchronous OCC has been experimentally demonstrated using various Android smartphones’ built-in cameras with a variable symbol rate when the ratio of the line interval of RS to the symbol length is expressed as a simple integer ratio. Error-free transmission has been achieved from 4 to 14 kilo-symbols per second (symbols/s) using smartphones’ 30-frame-persecond (fps) image sensors.

Rolling-shutter-based asynchronous optical camera communication by a cycle pattern of received symbols using smartphones