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ietf doc: fine energy

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Jean-Marc Valin 2009-06-11 17:40:37 -04:00
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doc/ietf/draft-valin-celt-codec.xml
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@ -321,7 +321,14 @@ implemented in ec_laplace_encode() (<xref target="laplace.c">laplace.c</xref>).
<section anchor="fine-energy" title="Fine energy quantization"> <section anchor="fine-energy" title="Fine energy quantization">
<t> <t>
After the coarse After the coarse energy quantization and encoding, the bit allocation is computed
(<xref target="allocation"></xref>) and the number of bits to use for refining the energy quantization is determined for each band. Let B_i be the number of fine energy bits
for band i, the refement is an integer f in the range [0,2^B_i-1]. The mapping between f
and the correction applied to the corse energy is equal to (f+1/2)/2^B_i - 1/2.
</t>
<t>
Remaining bits encoded at the end
</t> </t>
</section> <!-- fine energy --> </section> <!-- fine energy -->