Patent ID: 7864214

Claim:
A signal processing device comprising a processing unit that restores one of a signal before fluctuation, a signal which should have been intrinsically obtained, and signal data which is approximated to these signals (these signals are called an original signal) from an initial signal (called fluctuated data) which has fluctuated like deterioration, wherein: a fluctuated data region storing fluctuated data and a restored data region storing signal data (restored data) restored every restoring process are installed, wherein the processing unit repeats the following processing in order to produce data formed in the restored image data region at the completion of the processing as original signal data: transferring energy of the fluctuated data from the fluctuated data region to the restored data region using fluctuation-factor information data, which is a fluctuation factor so as to produces the restored data; and substituting residual data remained in the fluctuated data region by the transferring with the fluctuated data.