Stereo mixture 
a) Student t prior with block update of the sources

estimate 1 estimate 2 estimate 3 
b) Student t prior with individual update of the sources

estimate 1 estimate 2 estimate 3 
c) Hierarchical prior with Bernoulli prior and individual update of the sources 
estimate 1 estimate 2 estimate 3 
d) Hierarchical prior with horizontal Markov prior and individual update of the sources 
estimate 1 estimate 2 estimate 3 
Original sources 
source 1 source 2 source 3 