Hi Valentin, The inputs to a region are best if they are an SDR (large number of bits, maybe 500-2,000, with a sparse on-bit population of say 2%) or a sensory representation of say 128 bits with 20-30 bits on at any time. It is important in both cases that you have overlapping bits semantically significant (so you can subsample the on-bits and still approximate the data).
Less than 4% is fine for input data as long as the 4% is semantically good (ie that if the underlying meaning of the data changes semantically by 5-10%, only 5-10% of the bits change). Regards Fergal Byrne
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