5.4.1 PLC method selection

26.4473GPPCodec for Enhanced Voice Services (EVS)Error concealment of lost packetsRelease 17TS

There is a multitude of PLC methods for MDCT coding modes available. Best possible codec performance in error-prone situations with frame losses is obtained through selecting the most suitable method for a given bit rate, coded audio bandwidth, used MDCT mode and signal class.

The main selector is the MDCT mode of the previous frame, i.e. TCX MDCT or HQ MDCT. Second level criteria are described in the following subclauses.