Encoding and Decoding
- Encoding solves “how does a stimulus cause a pattern of responses?” ().
- Decoding solves “what do these responses tell us about the stimulus?” ().
Basic Coding Model
In the following context, represents signal, represents response, represents filter and represents nonlinear function.
Temporal filtering: linear filters
Linear filter & nonlinearity
We want to sample the responses of the system to many stimuli so we can characterize what it is about the input that triggers responses.
Kullback-Leibler divergence: difference between two probability distribution.
The Goodness measure between and :