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Size of subblock gain mp3, Two contradicting sizes from two sources, why is 9 bits (mono) wrong?
post Jun 29 2013, 21:37
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What I got so far: subblock_gain is only used when window_switching_flag = 1 and block_type = 2 --- the latter meaning that 3 short windows are used per subblock.
The confusing part is that Rassol's paper (The Theory Behind Mp3,2002) states that the subblock_gain flag is 9 bits (mono) or 18 bits (dual).
Meanwhile, Sripada's thesis (MP3 DECODER in Theory and Practice) states that the subblock_gain flag is 10 bits (mono) or 18 (dual).

I'm conserned with the mono part. 10 bits works out --- then the size of the sideinfo is 17 bytes as the standard specifies it to be --- , but is 9 bits, as Rassol claimes, simply incorrect or is there something I'm missing here?

Comments are welcome.

This post has been edited by Mussť: Jun 29 2013, 21:41
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