A consideration on visualization of temporal signals by feedback SOM

Hiroshi Wakuya, Shohei Matsuoka, Hideaki Itoh, Sang-Hoon Oh
2014 2014 Joint 7th International Conference on Soft Computing and Intelligent Systems (SCIS) and 15th International Symposium on Advanced Intelligent Systems (ISIS)  
Abstract|An Elman-type feedback SOM (EFSOM) is a modiåed version of the standard SOM for temporal signal processing. It was applied to various kinds of tasks so far, and it showed good performance on temporal signal processing. By the way, one of the major features inspired by the standard SOM is to visualize given data structure into the two-dimensional plane preserving its topology. Then, from the visualization point of view, a working mechanism of the feedback SOM (FSOM), which is an
more » ... l part of the EFSOM, is investigated in this paper. As a result of computer simulations, a trajectory of the winner neurons is bifurcated, not overlapped between any two segments, with the help of feedback pathways. This fact implies that the FSOM can deal with the past history, i.e., the context information, appropriately. Furthermore, when continuous pattern is used for training, it is found that signal processing developed in the SOM is quite similar to that for an A/D converter based on the discretized reference vectors.
doi:10.1109/scis-isis.2014.7044801 dblp:conf/scisisis/WakuyaMIO14 fatcat:fd4vqg2xh5bzrpoymamtexvbby