IIRC, when I implemented Olli's coefficients I was seeing about 40dB image
rejection. My optimized filter gave more like 58dB.
Eric
On Feb 4, 2017, at 7:25 PM, robert bristow-johnson wrote:
>
> sunuvubych Olli. i shoulda known about this.
>
> i dunno Eric, 2/100 radian is about ±0.5°. that'
�
you know it's embarrassing to rediscover you've been somewhere before, after
totally forgetting about it.
so Olli, how do you get your coefficients? �(if i may ask?)
r b-j�
Original Message
Subject: Re: [music-dsp] � 45� Hilbert tr
�
sunuvubych Olli. i shoulda known about this.
i dunno Eric, 2/100 radian is about �0.5�. �that's what Olli is indicating on
Figure 3. �appears to be an 8th-order using 4 pole pairs about the origin on
the real line. (i'm just now groking his design
methodology.) and he seems to have exceeding
The original Csound source has a set of coefficients for this type of
hilbert transform but they don't say how the coefficients were derived
and the performance is fairly lackluster. The only reference I've come
across for this was Olli Niemitalo's:
http://yehar.com/blog/?p=368
He gives a bit
�
hey guys,
what's the best online reference you can tell me for theory and practice of
designing APF pairs with � 45� phase (+ a linear phase that represents
causality delay)�to result in a Hilbert pair for audio processing. �i know how
to do this for FIR
and to use half-band symmetry, but i
