UNIFIED SPEECH/AUDIO CODER(USAC) PROCESSING WINDOWS SEQUENCE BASED MODE SWITCHING, PARTICULARLY FOR PERFORMING ENCODING OR DECODING BY OVERLAPPING BETWEEN FRAMES BASED ON A FOLDING POINT WHEN MODE SWITCHING OCCURS

摘要

PURPOSE: A unified speech/audio coder(USAC) processing windows sequence based mode switching is provided to perform encoding or decoding by processing different window sequences for different situation, thereby improving coding efficiency.;CONSTITUTION: A mode switching unit performs inter-linear prediction domain mode switching for the sub-frames which constitute a frame of an input signal. An encoding unit applies a window sequence to current encoding subframes, wherein the window sequence is based on a switched LPD(Linear Prediction Domain) mode. In addition, the encoding unit applies a changed window sequence to the current encoding subframe according to the LPD modes of previous and following subframes.;COPYRIGHT KIPO 2010