Image signal processing apparatus and digital signal processing method

A digital signal processing method for processing an input digital image signal and generating an output digital image signal, comprising the steps of:

• clustering a plurality of pixel data of said input digital image signal adjacent to a subject pixel data by clustering means to produce a class;
• storing predictive operation parameter data for respective classes at addresses of memory corresponding to said respective classes determined by said clustering means;
• selecting a plurality of pixel data from said input digital image signal corresponding to a pixel data of said output digital image signal by selecting means;
• operating said predictive operation parameter data from said memory and said plurality of pixel data from said selecting means to produce a plurality of kinds of predictive operation of generating means;
• and
• selecting one of said kinds of predictive operation to generate the output digital image signal corresponding to the selected kind of predictive operation.

A digital signal processing method for processing an input digital image signal and generating an output digital image signal, comprising the steps of:

• clustering a plurality of first pixel data of said input digital image signal adjacent to a subject pixel data by first clustering means to produce a first class;
• storing first predictive operation parameter data for the first class at address of first memory corresponding to said first class determined by said first clustering means;
• selecting a plurality of first pixel data from said input digital image signal corresponding to first pixel data of said output digital image signal by first selecting means;
• operating said first predictive operation parameter data from said first memory and said plurality of first pixel data from said selecting means to produce a plurality of kinds of first predictive operation of first generating means;
• clustering a plurality of second pixel data of said input digital image signal adjacent to said subject pixel data by second clustering means to produce a second class;
• storing second predictive operation parameter data for the second class at address of second memory corresponding to said second class determined by said second clustering means;
• selecting a plurality of second pixel data from said input digital image signal corresponding to second pixel data of said output digital image signal by second selecting means;
• operating said second predictive operation parameter data from said second memory and said plurality of second pixel data from said second selecting means to produce a plurality of kinds of second predictive operation of second generating means;
• and
• controlling said first and second generating means so as to select one of the plurality of kinds of first and second predictive operation of first and second generating means as their outputs.