Patent ID: 7627198

Claim:
An information signal processing device configured to convert a first information signal including a plurality of sets of first information data into a second information signal including a plurality of sets of second information data, said device comprising: a class tap extracting unit configured to divide said first information signal into blocks of one or more sets of said first information data, and to extract said first information data contained in each of said blocks as class taps for each block; a class classification unit configured to classify, based on said class taps extracted by said class tap extracting unit, each of said class taps into one of a plurality of classes, to obtain a class code; an auxiliary data generating unit configured to generate auxiliary data based on data based on at least said class taps extracted by said class tap extracting unit; and a data generating processing unit configured to generate said second information signal, corresponding to said class taps, according to a data generation codebook including said second information data corresponding to said first information data, based on said data based on said class taps, and said auxiliary data, wherein said first information signal and said second information signal are audio or video signals, and a resolution of said second information signal is higher than a resolution of said first information signal.