How the Stereo Mono and Duel Channel Data Elements in AAC Identified???

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<SCE><Term><SCE><TERM> === Output as Mono

<CPE><TERM><CPE>TERM====== Output as Stereo


then my doubt is

<SCE><SCE><TERM><SCE><SCE><TERM> ====Output as ???

As that is not one of the standard defined channelConfigurations there should be a Program Config Element in the stream (actually in the Audio Specific Config if it is a MP4 or LATM file) to define what each element represents.

Which field in the PCE will determine the stream is stereo or Mono. If it stereo what extra operation will Needs and for Mono what are the operations added or substracted???

I didn't understand where the difference in the decoder blocks comes when mono and stereo streams with this type decoded

Thanks in Advance!!!