Signal processing apparatus and method, recording medium, and program

A signal processing method comprising:

• a first extracting step of extracting a first part used for classification from an input signal to which a plurality of types of signals are multiplexed;
• a detecting/classifying step of detecting patterns by using a plurality of methods based on the first part extracted in the first extracting step so as to classify the patterns into classes;
• a first storage control step of controlling storage of an S/N-ratio value of each of the classes set in the detecting/classifying step;
• a class determining step of determining a class to be adopted from the classes set in the first detecting/classifying step based on the S/N-ratio values, the storage thereof being controlled in the first storage control step;
• a second storage control step of controlling storage of a plurality of predictive coefficients;
• a predictive-coefficient determining step of determining a predictive coefficient corresponding to the class determined in the class determining step from the predictive coefficients, the storage thereof being controlled in the second storage control step;
• a second extracting step of extracting a second part used for prediction from the input signal;
• and
• a signal generating step of computing and generating a predetermined signal based on the second part extracted in the second extracting step and the predictive coefficient determined in the predictive-coefficient determining step.

A computer-readable medium encoded with a computer-readable program that when executed on a processor causes the processor to execute a signal processing method, said method comprising:

• a first extracting step of extracting a first part used for classification from an input signal to which a plurality of types of signals are multiplexed;
• a detecting/classifying step of detecting patterns by using a plurality of methods based on the first part extracted in the first extracting step so as to classify the patterns into classes;
• a first storage control step of controlling storage of an S/N-ratio value of each of the classes set in the detecting/classifying step;
• a class determining step of determining a class to be adopted from the classes set in the first detecting/classifying step based on the S/N-ratio values, the storage thereof being controlled in the first storage control step;
• a second storage control step of controlling storage of a plurality of predictive coefficients;
• a predictive-coefficient determining step of determining a predictive coefficient corresponding to the class determined in the class determining step from the predictive coefficients, the storage thereof being controlled in the second storage control step;
• a second extracting step of extracting a second part used for prediction from the input signal;
• and
• a signal generating step of computing and generating a predetermined signal based on the second part extracted in the second extracting step and the predictive coefficient determined in the predictive-coefficient determining step.

A signal processing apparatus comprising:

• multiplexing means for multiplexing a plurality of signals, each signal including one type of signal;
• first extracting means for extracting a first part used for classification from a signal generated by multiplexing the plurality of signals by using the multiplexing means;
• detecting/classifying means for detecting patterns by using predetermined 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 a plurality of predictive coefficients;
• predictive-coefficient determining means for determining a predictive coefficient corresponding to the class set by the detecting/classifying means from the predictive coefficients stored in the first storage means;
• second extracting means for extracting a second part used for prediction from the multiplexed signal;
• 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;
• S/N-ratio calculating means for calculating S/N-ratio values used for generating the predetermined signal by the signal generating means;
• and
• second storage means for storing the S/N-ratio values calculated by the S/N-ratio calculating means.

A signal processing method comprising:

• a multiplexing step of multiplexing a plurality of signals, each signal including one type of signal;
• a first extracting step of extracting a first part used for classification from a signal generated by multiplexing the plurality of signals in the multiplexing step;
• a detecting/classifying step of detecting patterns by using predetermined methods based on the first part extracted in the first extracting step so as to classify the patterns into classes;
• a first storage control step of controlling storage of a plurality of predictive coefficients;
• a predictive-coefficient determining step of determining a predictive coefficient corresponding to the class set in the detecting/classifying step from the predictive coefficients, the storage thereof being controlled in the first storage control step;
• a second extracting step of extracting a second part used for prediction from the multiplexed signal;
• a signal generating step of computing and generating a predetermined signal based on the second part extracted in the second extracting step and the predictive coefficient determined in the predictive-coefficient determining step;
• an S/N-ratio calculating step of calculating S/N-ratio values used for generating the predetermined signal in the signal generating step;
• and
• a second storage control step of controlling storage of the S/N-ratio values calculated in the S/N-ratio calculating step.

A computer-readable medium encoded with a computer-readable program that when executed on a processor causes the processor to execute a signal processing method, said method comprising:

• a multiplexing step of multiplexing a plurality of signals, each signal including one type of signal;
• a first extracting step of extracting a first part used for classification from a signal generated by multiplexing the plurality of signals in the multiplexing step;
• a detecting/classifying step of detecting patterns by using predetermined methods based on the first part extracted in the first extracting step so as to classify the patterns into classes;
• a first storage control step of controlling storage of a plurality of predictive coefficients;
• a predictive-coefficient determining step of determining a predictive coefficient corresponding to the class set in the detecting/classifying step from the predictive coefficients, the storage thereof being controlled in the first storage control step;
• a second extracting step of extracting a second part used for prediction from the multiplexed signal;
• a signal generating step of computing and generating a predetermined signal based on the second part extracted in the second extracting step and the predictive coefficient determined in the predictive-coefficient determining step;
• an S/N-ratio calculating step of calculating S/N-ratio values used for generating the predetermined signal in the signal generating step;
• and
• a second storage control step of controlling storage of the S/N-ratio values calculated in the S/N-ratio calculating step.