Patent ID: 7495707

Claim:
A signal processing apparatus comprising: first extracting means for extracting a first part used for classification from an input signal to which a plurality of types of signals are multiplexed; detecting/classifying means for detecting patterns by using a plurality of methods based on the first part extracted by the first extracting means so as to classify the patterns into classes; first storage means for storing an S/N-ratio value of each of the classes set by the detecting/classifying means; class determining means for determining a class to be adopted from the classes set by the first detecting/classifying means based on the S/N-ratio values stored in the first storage means; second storage means for storing a plurality of predictive coefficients; predictive-coefficient determining means for determining a predictive coefficient corresponding to the class determined by the class determining means from the predictive coefficients stored in the second storage means; second extracting means for extracting a second part used for prediction from the input signal; and signal generating means for computing and generating a predetermined signal based on the second part extracted by the second extracting means and the predictive coefficient determined by the predictive-coefficient determining means.