Capitolul 1: Bancuri de filtre
Capitolul 1: Bancuri de filtre
Capitolul 1: Bancuri de filtre
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PAS cap. 1: <strong>Bancuri</strong> <strong>de</strong> <strong>filtre</strong> – p. 41/75<br />
Implementare eficientă<br />
• Matricea polifază <strong>de</strong> analiză este<br />
[<br />
H 00 (z) H 01 (z)<br />
A(z) =<br />
H 00 (z) −H 01 (z)<br />
]<br />
• Deci implementarea BF QMF se poate face prin schema<br />
(verificaţi partea <strong>de</strong> sinteză !)<br />
✓✏<br />
x ✲ ↓2 ✲H 00 (z)<br />
❄ ✒✑<br />
z −1 ✓✏<br />
✲ ↓2 ✲H 01 (z)<br />
✒✑<br />
−1<br />
✲<br />
✲H 01 (z)<br />
✣ ✣<br />
−1<br />
❫ ✲ ❫✲ H 00 (z)<br />
✓✏<br />
✲ ↑2<br />
✒✑❄<br />
z −1 ✓✏<br />
✲ ↑2 ✲❄<br />
✒✑<br />
y