Information signal processing device and processing method, codebook generating device and generating method, and program for executing the methods

An information signal processing method for converting 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 method comprising:

• dividing said first information signal into blocks of one or more sets of said first information data, and extracting said first information data contained in each of said blocks as class taps for each block;
• classifying, based on said class taps extracted in said dividing, said class taps into one of a plurality of classes, to obtain a class code;
• generating auxiliary data based on data based on at least said class taps extracted in said dividing;
• and
• generating, by a processor, 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.

A computer-readable storage medium having embedded therein instructions, which when executed by a computer, cause the computer to execute an information signal processing method for converting 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 method comprising:

• dividing said first information signal into blocks of one or more sets of said first information data, and extracting said first information data contained in each of said blocks as class taps for each block;
• classifying, based on said class taps extracted in said dividing, said class taps into one of a plurality of classes, to obtain a class code;
• generating auxiliary data based on data based on at least said class taps extracted in said dividing;
• and
• generating 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.