METHOD FOR PRETREATING DATA COMPRESSION ADAPTED TO ELECTROCORTICOGRAPHIC SIGNAL MEASUREMENT (ECOG) DATA AND SYSTEM FOR ACQUIRING AND TRANSMITTING ECOG DATA

摘要

A raw data compression pretreatment method ui (tN) of electrocorticographic signal measurements (ECoG) evolving over time using electrodes disposed in direct contact with a cortex comprises an effective compression pretreatment step in which each raw signal ui (tN) acquired by the observed electrode i is converted into a preprocessed signal εi (tN) equal to the difference between a first term and a second term and appropriate for a second entropy encoding step. The first term is equal to the raw signal acquired at the electrode i at the current time tN, and the second term is a function of prediction which depends on past raw signals observed in the near past in at least neighboring electrodes σi ( j) the observed electrode or at most in neighboring electrodes σi (j) of the observed electrode i and in the observed electrode