Method of forming modifying data related to data sequence of data frame including electroencephalogram data, processing method of electroencephalogram data and electroencephalogram apparatus

An electroencephalogram apparatus for forming modifying data for a data sequence of a data frame including electroencephalogram data, wherein the electroencephalogram apparatus comprises

• one or more processors;
• and
• one or more memories including computer program code;
• the one or more memories and the computer program code configured to, with the one or more processors, cause the electroencephalogram apparatus at least to:
• form the modifying data by selecting one sequence from at least one surrogate data sequence for a neutral data sequence that is for replacing a missing or corrupted data sequence of the electroencephalogram data or selecting a surrogate algorithm from at least one surrogate algorithm, each of which is for generating the at least one surrogate data sequence, by performing an optimization comparison between a first data and a second data, a criterion of the optimization being limitation of disturbance caused by application of the modifying data to the data frame:
• the first data comprising reference data, which corresponds to the electroencephalogram data, or a reference algorithm for generating the reference data, and
• the second data comprising at least one result formed by applying a result algorithm, which provides characterizing information on the data frame including the electroencephalogram data, to the electroencephalogram data with the at least one surrogate data sequence replacing the missing or corrupted data sequence of the electroencephalogram data, or the result algorithm that is for generating the at least one result from the electroencephalogram data with the at least one surrogate data sequence or the result algorithm with the electroencephalogram data and the at least one surrogate algorithm that is for providing the at least one surrogate data sequence.