[Vorbis] Floor 1 Decode
dbalatoni at programozo.hu
Fri Sep 16 03:50:49 PDT 2005
szerda 14 szeptember 2005 08.04-kor sameen eajaz ezeket a bolcs gondolatokat
> 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 ?
No, actally the floor values are the quantizers and the residue is the
quantized value. Hence residue*floor=original values with quantization error.
> 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 ?
The encoders I know of do so.
> 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 ?
Yes (the ratio between the smallest and the largest value in the
> warm regards,
What kills me, doesn't make me stronger.
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