Information processing apparatus and method, recording medium, and program

An information processing method of an information processing apparatus for processing one or more image signals, the method comprising:

• a first extracting step, utilizing a first extracting unit, of extracting a signal in a first range from an input signal;
• a retrieval step, utilizing a retrieving unit, of comparing a feature of the extracted input signal in the first range with a feature of a signal of a first type in the first range, the signal of the first type and a corresponding signal of a second type being included in a pre-stored signal pair, to retrieve a signal pair including the signal of the first type in the first range having a predetermined relationship with the feature of the extracted input signal in the first range;
• a calculating step, utilizing a calculating unit, of calculating a prediction coefficient based on the signal of the second type and the signal of the first type in a second range in the retrieved signal pair;
• a second extracting step, utilizing a second extracting unit, of extracting a signal in the second range from the input signal;
• and
• a generating step, utilizing a generating unit, of generating an output signal as a signal of the second type from the input signal in the second range based on the calculated prediction coefficient.

A computer-readable recording medium storing a program comprising:

• a first extraction step of extracting a signal in a first range from an input signal;
• a retrieval step of comparing a feature of the extracted input signal in the first range with a feature of a signal of a first type in the first range, the signal of the first type and a corresponding signal of a second type being included in a pre-stored signal pair, to retrieve a signal pair including the signal of the first type in the first range having a predetermined relationship with the feature of the extracted input signal in the first range;
• a calculation step of calculating a prediction coefficient based on the signal of the second type and the signal of the first type in a second range in the retrieved signal pair;
• a second extraction step of extracting a signal in the second range from the input signal;
• and
• a generation step of generating an output signal as a signal of the second type from the input signal in the second range based on the calculated prediction coefficient.

An information processing apparatus comprising:

• first generation means for generating a signal of a first type from an input signal of a second type;
• first extraction means for extracting a signal in a first range from the generated signal of the first type;
• second extraction means for extracting a signal in a second range from the generated signal of the first type;
• second generation means for generating a signal pair including the signal of the second type and the signal of the first type corresponding to the signal of the second type, the signal of the first type being in a range defined by the logical OR between the extracted first range and the second range;
• and
• storage means for storing the signal pair.

An information processing method of an information processing apparatus for processing image signal, the method comprising:

• a first generating step, utilizing a first generating unit, of generating a signal of a first type from an input signal of a second type;
• a first extracting step, utilizing a first extracting unit, of extracting a signal in a first range from the generated signal of the first type;
• a second generating step, utilizing a second generating unit, of extracting a signal in a second range from the generated signal of the first type;
• a second generating step, utilizing a second generating unit, of generating a signal pair including the signal of the second type and the signal of the first type corresponding to the signal of the second type, the signal of the first type being in a range defined by the logical OR between the extracted first range and the second range;
• and
• a storage step, utilizing a storage unit, of storing the generated signal pair.

A computer-readable recording medium storing a program comprising:

• a first generation step of generating a signal of a first type from an input signal of a second type;
• a first extraction step of extracting a signal in a first range from the generated signal of the first type;
• a second extraction step of extracting a signal in a second range from the generated signal of the first type;
• a second generation step of generating a signal pair including the signal of the second type and the signal of the first type corresponding to the signal of the second type, the signal of the first type being in a range defined by the logical OR between the extracted first range and the second range;
• and
• a storage step of storing the generated signal pair.