Frame loss concealment for multi-rate speech / audio codecs

摘要

An audio coding terminal and method is provided. The terminal includes a coding mode setting unit to set a mode of operation, from plural modes of operation, for coding by a codec of input audio data, and the codec configured to code the input audio data based on the set mode of operation such that when the set mode of operation is a high frame erasure rate (FER) mode of operation the codec codes a current frame of the input audio data according to one of plural frame erasure concealment (FEC) modes. Upon the coding mode setting unit setting the mode of operation to be the High FER mode of operation, the coding mode setting unit selects the one FEC mode, from the plural FEC modes predetermined for the High FER mode of operation, to control the codec based on an incorporating of redundancy within a coding of the input audio data or as separate redundancy information separate from the coded input audio according to the set one FEC mode.