APPARATUS AND METHOD FOR ENCODING AND DECODING AUDIO SIGNALS USING WEIGHTED LINEAR PREDICTION TRANSFORM

摘要

PURPOSE: An audio signal encoding/decoding apparatus using weighted linear prediction conversion for increasing voice quality is provided to reduce the size of the encoded audio signal after minimizing the deterioration of the voice quality. CONSTITUTION: An audio signal encoding apparatus includes a mode selection unit(170), a bit rate determination unit, and a weighted linear prediction transform encoding unit(180). The mode selection unit selects an encoding mode of an audio frame. The bit rate determination unit determines the target bit rate of the audio frame according to the selected encoding mode. The weighted linear prediction transform encoding unit performs weighted linear prediction transform encoding according to the determined target bit rate.