METHOD AND APPARATUS FOR FRAME ERASURE CONCEALMENT FOR A MULTI-RATE SPEECH AND AUDIO CODEC

摘要

Disclosed are an audio coding terminal and an audio coding method. The audio coding terminal of the present invention comprises: a coding mode setting unit for setting one of a plurality of operation modes for coding using a codec of input audio data; and a codec for coding the input audio data by coding a current frame of the input audio data in accordance with any one of a plurality of frame erasure concealment (FEC) modes when the operation mode is a high frame erasure rate (FER) operation mode. According to the present invention, directly after the operation mode is set to the high FER operation mode, the coding mode setting unit selects any one FEC mode from a preset FEC mode for the high FER operation mode, and can control a codec to combine redundancy included in coding of the input audio data or for coding the input audio data on the basis of separated redundancy information separated from the input audio data coded to correspond to the set FEC mode. According to the present invention, FEC can be efficiently performed or restored.