| 摘要 |
PROBLEM TO BE SOLVED: To appropriately decode an audio signal by correcting the high-pass component of an encoded audio signal. SOLUTION: In a decoder 100, when a transient characteristic detection section 150 determines that attack sound is included in HE-AAC (high-efficiency advanced audio coding) data, an LPC analysis section 160a and an LPC reverse filter section 160b remove the normal component of a low-pass component data, and a high-pass correction section 170 generates a corrected high-pass data in which high-pass component data are corrected according to the time width of a corrected low-pass data, and a synthesis filter section 180 generates HE-AAC decoded sound data by synthesizing the low-pass component data and the corrected high-pass component data. COPYRIGHT: (C)2009,JPO&INPIT
|
