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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?

Manish Kumar
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2 Answers2

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

Rakshak
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  • We will always get the frame in bytes. IN this case, its going to be 5 bytes. so the 40th bit expected is 0 in case of AMR NB.(because padding is 0 always). but we can't say conclusively that 40th bit in AMR WB will be 1 always(to differentiate both of them one should be zero and other as 1.) – Manish Kumar Aug 25 '14 at 09:36
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The frame type of AMRNB SID is 8 while AMRWB's frametype is 9.

rongvietnj
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  • In the question it is mentioned I am getting only the payload bits and no table of content which includes the frame type information. – Manish Kumar Sep 09 '14 at 06:38