Lines Matching refs:f2
94 F1(z) and F2(z), and Lsp_Az, which converts LSP to LPC by multiplying
95 F1(z) by 1+z^(-1) and F2(z) by 1-z^(-1), then calculating A(z) = (F1(z) +
96 F2(z))/2.
160 This function finds the polynomial F1(z) or F2(z) from the LSPs. If the LSP
162 address 1, F2(z) is computed.
168 F2(z) = product ( 1 - 2 lsp[i] z^-1 + z^-2 )
438 (1) Find the coefficients of F1(z) and F2(z) (see Get_lsp_pol)
439 (2) Multiply F1(z) by 1+z^{-1} and F2(z) by 1-z^{-1}
440 (3) A(z) = ( F1(z) + F2(z) ) / 2
461 Word32 f1[6], f2[6];
465 Get_lsp_pol (&lsp[1], f2);
470 f2[i] = L_sub (f2[i], f2[i - 1]); // f2[i] -= f2[i-1];
476 t0 = L_add (f1[i], f2[i]); // f1[i] + f2[i]
478 t0 = L_sub (f1[i], f2[i]); // f1[i] - f2[i]
518 f2[6];
527 Get_lsp_pol(&lsp[1], f2, pOverflow);
530 p_f2 = &f2[5];
535 *(p_f2--) -= f2[i-1];
540 p_f2 = &f2[1];
544 t0 = *(p_f1) + *(p_f2); /* f1[i] + f2[i] */
545 t1 = *(p_f1++) - *(p_f2++); /* f1[i] - f2[i] */
