Patent ID: 7236839
Filing Date: 2007-06-26
Classification: H04R

Abstract:
1. An audio processing unit for decoding and reproducing an encoded audio signal, the audio processing unit comprising: a decode-processing section for decoding the encoded audio signal that is inputted from the outside and generating PCM data; an extended band generating section for generating a band extension component with respect to the PCM data decoded by the decode-processing section; a band-variable bandpass filter for receiving the band extension component from the extended band generating section, and varying a passband based on the band extension component and outputting; an adder for adding the PCM data decoded by the decode-processing section and output data from the band-variable bandpass filter; a band determining section for determining the passband with respect to the band extension component, by using a decoding information of the encoded audio signal obtained from the decode-processing section as band determination information; and a bandpass filter controller for controlling the passband of the band-variable bandpass filter in accordance with an indication from the band determining section.