Thread View: comp.dsp
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Started by Kaamran Raahemifar
Sat, 10 Oct 1992 21:25
CD<->DAT sampling converter
Author: Kaamran Raahemifar
Date: Sat, 10 Oct 1992 21:25
Date: Sat, 10 Oct 1992 21:25
38 lines
1552 bytes
1552 bytes
Hello friends,
I have got some answers from comp.dsp, and I am thankful.
But still some questions remain:
1: I have got some combinations for 44.1<->48 sampling converter
like:
3:2, 7:5, 7:16 or
7:8, 3:5, 7:4 or
3:10, 7:4, 7:4
The true factorization gives us:
44.1 147 3*7*7
------=------=-----------
48 160 2*2*2*2*2*5
If your answer is yes, which one is better?.
In the book of
( Multirate Digital Signal Processing
By Crochiere and L.R. Rabiner),
They do not mentioned the way of optimizing the process
for L:M in general. They only discuss for Decimator or
Interpolator.(Not both together)
2: What kind of filters would be in most efficiency in this
application?.
Windowed ones, polyphase ones, IIR ones , ...?
Thank you all.
Kaamy
kaamran@sun14.vlsi.uwaterloo.ca
Re: CD<->DAT sampling converter
Author: Bill Laut
Date: Sun, 11 Oct 1992 21:50
Date: Sun, 11 Oct 1992 21:50
50 lines
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2332 bytes
<Warning: Slightly smart-alecy response follows...>
In article <BvxCuF.JDH@sun3.vlsi.uwaterloo.ca>, kaamran@sun18.vlsi (Kaamran Raahemifar) writes:
>
> Hello friends,
>
> I have got some answers from comp.dsp, and I am thankful.
> But still some questions remain:
>
> 1: I have got some combinations for 44.1<->48 sampling converter
> like:
>
> [23 lines delete]
>
> Thank you all.
>
> Kaamy
>
> kaamran@sun14.vlsi.uwaterloo.ca
On the other hand, you could always do what I did. Namely, purchase a
Sony DTC-1000ES and clip one of the diodes from the front panel. It then
records at 44.1 just fine.... Except for stuff with the copy-prohibit bit
set, but that's another story..
It's an elegant solution: Not much purchasing, and even less engineering...
Seriously, if there is any interest, e-mail to my address and I'll dismantle
the DTC-1000ES to remember which diode it is. If you look for it yourself,
you can't miss it. It's near where the Analog/Digital selector switch is,
and it's the only one there which ISN'T wave-soldered. I mean, you can tell
this thing was put on by hand, it's such a baaaaad soldering job....
And in defference to the old Sony-vs.-CBS debacle over DAT home recording,
if what you're after is pirating CDs, then DAT is not a very cost-effective
solution. You are much better off buying a Sony PCM-601ESD processor (which
runs at 44.1 anyway) running the CD into it, and then hooking up your favorite
VCR in extended record mode. Six hours of CD-quality audio for the cost of
an $8.00 blank tape? Now that's cost-effective! And it even comes with its
own built-in "music video" :-).
--
Bill Laut Internet: laut@alien.gici.com
Gull Island Consultants, Inc. Phone: (616) 780-3321
P.O. Box 627
Muskegon, MI 49440 >> "Usual disclaimers, apply within" <<
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