METHOD AND APPARATUS TO RESTORE HIGH FREQUENCY COMPONENT OF AUDIO DATA

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus to restore a high frequency component of audio data. SOLUTION: The method includes precesses of: generating a filter bank value of a low frequency band from a MDCT coefficient extracted from an input bitstream according to a window type, extracting transient information of a frame according to the window type and selecting a weight coefficient according to the extracted transient information, restoring a filter bank value of a lost high frequency band from the generated filter bank value of the low frequency band, and of adjusting the restored filter bank value of the high frequency components according to the selected weight coefficient. COPYRIGHT: (C)2006,JPO&NCIPI