Patent ID: 7605868

Claim:
An information processing apparatus comprising: storage means for storing a signal pair including a signal of a first type and a signal of a second type corresponding to the signal of the first type; first extraction means for extracting a signal in a first range from an input signal as a signal of the first type; retrieval means for comparing a feature of the extracted input signal in the first range with a feature of the signal of the first type in the first range in the 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; calculation means for 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; second extraction means for extracting a signal in the second range from the input signal; and generation means for 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.