METHOD OF DATA COMPRESSION PREPROCESSING TAILORED TO DATA OF MEASUREMENTS OF ELECTRO-CORTICOGRAPHIC SIGNALS (ECOG) AND SYSTEM FOR ACQUIRING AND TRANSMITTING ECOG DATA

摘要

A raw data compression pretreatment method ui (t N) of electrocorticographic signal measurements (ECoG) evolving over time using electrodes arranged in direct contact with a cortex comprises an effective step of compression pretreatment in which each raw signal ui (t N) acquired by the observed electrode i is converted into a preprocessed signal μ i (t N) equal to the difference between a first term and a second term and suitable for a second entropy encoding step . The first term is equal to the raw signal acquired at the electrode i at the current instant t N, 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. i (j) of the observed electrode or at most in electrodes close to i (j) of the electrode observed i and in the observed electrode