H(z,n)
H(z,n)
H(z,n)
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量 化 公 式<br />
层 1<br />
s <br />
whe re,<br />
2nb<br />
2 nb 1 * s <br />
2nb1<br />
s <br />
s <br />
nb<br />
s factor * s <br />
<br />
<br />
is the fra ctional num ber ,<br />
is the re qua ntize d value , and<br />
is the number of bits alloca te d to sa mples in the subband .<br />
s C * s D<br />
whe re,<br />
<br />
s <br />
s <br />
层 2<br />
<br />
is the fra ctional num ber , and<br />
is the re qua ntize d value .<br />
层 3<br />
(1) long block:<br />
4<br />
xr i<br />
= signis i * is 3 2 i<br />
<br />
1<br />
4<br />
global _gain[gr] - 210 - 8subblock_ gain[window][gr] <br />
scalefac _ multiplier* scalefac _ s[gr][ch ][sfb ][window]<br />
2<br />
<br />
(2) short block:<br />
4 1<br />
global _ gain[gr]- 210<br />
xr i<br />
= signis i * is 3 i<br />
*2 4<br />
<br />
<br />
<br />
scalefac _ multiplier* scalefac _ l[sfb][ch ][gr] preflag [gr]pretab[sfb]<br />
2
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