Method and apparatus for decoding a bitstream including encoded higher order ambisonics representations

A method for decoding a bitstream comprising encoded Higher Order Ambisonics (HOA) representations, said method comprising:

• reading a bit KindOfCodedPredIds;
• determining a value of KindOfCodedPredIds;
• if the value of KindOfCodedPredIds=0:
• determining an array ActivePred, wherein each element of the array ActivePred indicates if, for a corresponding direction, a prediction is performed;
• if the value of KindOfCodedPredIds=1:
• determining an array PredIDs, wherein the array PredIDs is determined based on a number NumActivePred of active predictions for decoding the bitstream;
• determining a vector ptype, wherein the vector ptype is determined, based on the value of KindofCodedPredIds, based on either the array ActivePred or the array PredIDs and the number NumActivePred;
• and
• determining, based on the vector ptype, a matrix PIND denoting indices from which directional signals a prediction for a direction is to be performed.