Patent ID: 8422569

Claim:
An encoding apparatus, comprising: a band splitter that performs band split processing of an input signal, and provides a lower/middle band component lower than a first frequency and a higher band component one of equal to and higher than the first frequency; a lower band encoder that provides a lower band component by suppressing a part one of equal to and higher than a second frequency in the lower/middle band component, and provides lower band encoded information by encoding the lower band component; a middle band corrector that corrects a middle band component one of equal to and higher than the second frequency in the suppressed lower/middle band component, and provides a corrected middle band component; and a middle/higher band encoder that encodes the corrected middle band component and the higher band component, and provides middle/higher band encoded information, wherein the lower band encoder comprises: a low-pass filter that suppresses the middle band component by performing low-pass filtering of the lower/middle band component, and provides the lower band component; and an encoder that provides the lower band encoded information by encoding the lower band component, and further provides a spectrum of the middle band component in a coding process, and the middle band corrector provides the corrected middle band component by multiplying the spectrum by a reciprocal of a characteristic of the low-pass filter.