Method and apparatus of decoding low-rate visible light communication signals

A computer program product for use in a device including a camera which receives and recovers information from visible light communication (VLC) signal, the computer program product comprising:

• a non-transitory computer readable medium comprising:
• code for causing at least one computer to sum pixel values in each row of pixel values corresponding to a first region of an image sensor to generate a first array of pixel value sums, at least some of said pixel value sums representing energy recovered from different portions of said VLC light signal, said different portions being output at different times and with different intensities;
• and
• code for causing said at least one computer to perform a first demodulation operation on the first array of pixel value sums to recover information communicated by the VLC signal.

A device including a camera which receives and recovers information from a visible light communication (VLC) signal comprising:

• an image sensor;
• at least one processor coupled to said image sensor, said processor being configured to:
• sum pixel values in each row of pixel values corresponding to a first region of said image sensor to generate a first array of pixel value sums, at least some of said pixel value sums representing energy recovered from different portions of said VLC light signal, said different portions being output at different times and with different intensities;
• and
• perform a first demodulation operation on the first array of pixel value sums to recover information communicated by the VLC signal;
• and
• memory coupled to said at least one processor.