Lines Matching +full:pre +full:- +full:emphasis

1 # 15/50us EIAJ de-emphasis filter for CD/DAT
10 # This implements the inverse filter of the optional pre-emphasis stage
17 # The commonly used solution at that time was to 'pre-emphasize' the
18 # trebles to have a better signal-noise-ratio. That is trebles were
31 # |      20dB / decade ->/  |
41 # filter automatically, the cd-rom drives or cd burners used by digital
54 OmegaU = 1. / 15e-6
59 H0 = V0 - 1.
61 A1 = (B - 1.) / (B + 1.)
62 B0 = (1. + (1. - A1) * H0 / 2.)
63 B1 = (A1 + (A1 - 1.) * H0 / 2.)
77 gain = -9.477
84 alpha = sin(w0) / 2. * sqrt((A + 1. / A) * (1. / slope - 1.) + 2.)
85 b0 = A * ((A + 1.) + (A - 1.) * cos(w0) + 2. * sqrt(A) * alpha)
86 b1 = -2. * A * ((A - 1.) + (A + 1.) * cos(w0))
87 b2 = A * ((A + 1.) + (A - 1.) * cos(w0) - 2. * sqrt(A) * alpha)
88 a0 = (A + 1.) - (A - 1.) * cos(w0) + 2. * sqrt(A) * alpha
89 a1 = 2. * ((A - 1.) - (A + 1.) * cos(w0))
90 a2 = (A + 1.) - (A - 1.) * cos(w0) - 2. * sqrt(A) * alpha
110 plot [f=1000:20000] [-12:2] \
118 pause -1 "Hit return to continue"