Differentiate between Silence frame of AMR NB and AMR WB speech codec?

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If I am getting the payload bits, comfort noise parameters only, Is there any way I can differentiate to which codec AMR NB and AMR WB speech codec these bits belong to?

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Size of AMR WB Silence frame is 40 bits and AMR NB Silence frame is 39 bits.

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The frame type of AMRNB SID is 8 while AMRWB's frametype is 9.