[Vorbis] Floor 1 Decode
sameen at techie.com
Tue Sep 13 23:04:17 PDT 2005
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
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
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 ?
In section 126.96.36.199 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 ?
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