6.3.4 Stereo output signal generation

26.2903GPPAudio codec processing functionsExtended Adaptive Multi-Rate - Wideband (AMR-WB+) codecRelease 17Transcoding functionsTS

The low and high frequencies of the low band left and right channels are combined together according to the following figure

The obtained low band left and right channels are combined with the high band signals in order to restore the full band left and right channels.