Patent ID: 7440029

Claim:
An apparatus for processing informational signal wherein a first informational signal including multiple items of informational data is converted to a second informational signal including multiple items of informational data, said apparatus comprising: data-processing means for converting values of the multiple items of the informational data of said first informational signal located around a target position in said second informational signal based on a correspondence relation between a value of informational data in output means for obtaining an output by said second informational signal and an output value to obtain plural output values; class-detecting means for detecting a class to which the informational data of the target position in said second informational signal belongs based on the plural output values obtained by said data-processing means; and informational-data-generating means for generating the informational data of the target position in said second informational signal based on said first informational signal corresponding to the class detected by said class-detecting means.