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<P>Dear All,</P>
<P>Floor 1 decoder uses FLOOR_fromdB_LOOKUP table. The purpose of this table is not clear to me. It is also not explicitly explained in the vorbis specification. </P>
<P>As i have understood is that it is used to dequantise the "Y" values which are decoded from the bitstream during curve synthesis. Is this correct ?</P>
<P>If so why does the table have only 256 elements ? This would imply that the "Y" value decoded from the bitstream should has a range from "0" to 256. ? Does the encoder ensure this ? </P>
<P>In section 1.3.2.8 of the vorbis specification "However, floor vector values can span ~140dB (~24 bits unsigned)" . What is this referring to ? Is it the final ( dequantised ) floor vector ?</P>
<P>warm regards,</P>
<P>Sameen</P></FONT><BR>
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