Searching \ for 'DSS Hacking' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=dss+hacking
Search entire site for: 'DSS Hacking'.

Truncated match.
PICList Thread
'DSS Hacking'
1998\07\17@121607 by craiglee

flavicon
face
I see there is an article in Radio Electronics magazine in the classified
section
selling information to 'construct and program smart cards w/pic 16C84'.

I've always been intigued by this and would like information, and not for
the dubious
nature, but for the intellectual challenge.

I built a ROM copier for the ATARI(dating myself), and for the SNES, never
used them,
just wanted to see how it was done.

Also if anyone has any information on MP2/3 decoding with the PIC, would you
please
pass it my way.  I'd like to build some portable thingy to play em.  Perhaps
just small
snippets of audio, played from static or dynamic ram.  Put it in your
grandma's pillow
sort of thing.......

Thanks,

Craig

spam_OUTcraigleeTakeThisOuTspamtelusplanet.net

1998\07\17@125812 by myke predko

flavicon
face
Hi Craig,

>I see there is an article in Radio Electronics magazine in the classified
>section
>selling information to 'construct and program smart cards w/pic 16C84'.

Stay away from them; they're generally rip-offs.  What I found was the guys
selling them ("vendor" is really too polite a term) had designed them for
their own use and saw selling the frames and hardware as a way to make a
quick buck.

They do not provide software or any kind of technical information other than
how the programmers are wired.  If they have come up with a way to break the
cards, they won't tell you about the interface protocols or algorithms used.

>I've always been intigued by this and would like information, and not for
>the dubious
>nature, but for the intellectual challenge.

I looked into it for the dubious reasons  :)

<SNIP Craig's sorted past>
>Also if anyone has any information on MP2/3 decoding with the PIC, would you
>please
>pass it my way.  I'd like to build some portable thingy to play em.  Perhaps
>just small
>snippets of audio, played from static or dynamic ram.  Put it in your
>grandma's pillow
>sort of thing.......

The satellite cards have nothing to do with the MPEG decoding; all they do
is take the bit stream from the incoming signal and indicate to the receiver
whether or not the picture can be displayed.

I have a copy of the MPEG specs and the PIC is not capable of real time
decoding.  We (Celestica) have built satellite receivers and the decoding
was first done by a DSP and then a custom ASIC.

For PIC audio, has anybody done anything more substantial than my "TuneMkr"?

myke

This week in myke's Book Room: "The Night Crew" by John Sandford

http://www.myke.com/Book_Room

1998\07\17@141531 by Martin Darwin

flavicon
face
On Fri, 17 Jul 1998, Craig Lee wrote:

> Also if anyone has any information on MP2/3 decoding with the PIC, would you
> please

Well if you are really interested in MP3 decoding try and obtain some
source for a linux mp3 decoder (there are a few of them). This should give
you the general algorithms.  I have heard that someone has obtained
(illegally no doubt) the algorithm that Winamp uses and is trying to make
a better linux mp3 player. The Winamp algorithm uses less cpu than the
classic one. BTW: Winamp is a kick ass mp3 player for Windows.

With that said you probably won't be able to stuff all that code into a
PIC. Also MP3 on the fly decoding with Winamp takes ~10% CPU (44KHz,
stereo, 128) on my ppro200 - this kinda rules out the PIC in terms of raw
computational power.

> pass it my way.  I'd like to build some portable thingy to play em.  Perhaps

There already exists one (or two). I don't have a URL handy but they were
pretty expensive (>$300) and had something like 16Meg of flash (maybe
more).

MD

1998\07\17@150240 by Sean Breheny

face picon face
On Fri, 17 Jul 1998, Martin Darwin wrote:

> you the general algorithms.  I have heard that someone has obtained
> (illegally no doubt) the algorithm that Winamp uses and is trying to make
> a better linux mp3 player. The Winamp algorithm uses less cpu than the
> classic one. BTW: Winamp is a kick ass mp3 player for Windows.


In my version of winamp (can't remember which off the bat), if you look
in help, it tells you how to (legally) get at least compiled code (maybe
even source, again, I can't remember exactly) of their engine.

Sean

1998\07\17@204443 by craiglee

flavicon
face
....ah yes, my sorted past (zip..)

>I have a copy of the MPEG specs and the PIC is not capable of real time
>decoding.  We (Celestica) have built satellite receivers and the decoding
>was first done by a DSP and then a custom ASIC.

Well real time isn't a concern... if it takes 30 seconds to dump 10 seconds
of audio, that would be fine.

Hmmmm.... I've got a friend out your way who used to work for Celestica,
then
he came west to JRC, and now he's back there at RIM.....oh it's a small worl
<snip>


Craig

More... (looser matching)
- Last day of these posts
- In 1998 , 1999 only
- Today
- New search...