From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: MP3 Adapter circuit for conventional boombox
Date: Mon, 09 Sep 2002 01:21:42 GMT
NNTP-Posting-Date: Sun, 08 Sep 2002 18:21:42 PDT
> Sounds good, but isn't:
> I don't have a MP3 PLAYER, but I have for example an
> AIWA boombox (normal CD playback and stereo),
> I'd like to install some adapter or circuit into the
> boombox to playback MP3s CDs (it must be a MP3 circuit
> I know there are a few MP3 boombox, but I wondering if
> someone though to change the encoder to read mp3 formats
> over normal boomboxes or stereos with normal CD player.
I don't know if this is practical. If MP3 uses copy protection like
movie DVDs, there is a serious problem. In DVDs there is an encrypted
exchange of the scrambling key for the decoder. If MP3 uses something
like this, the CD controller will not know how to deal with the key (CD
audio does not use a key but I think that CD video can). If MP3 is not
scrambled, you have a chance. Zoran, I believe, makes an MP3 decoder
(actually decodes all common formats as far as I know and I expect to
see a sample in the near future) and Atmel may make a pure MP3 decoder
(not sure on Atmel but I thought they had a chip out in this area).
There are some Japanese and Korean chips as well but I have no success
getting samples from them (they seem to get paranoid when another semi
company asks for samples). The decoder might not be all that is needed,
however. I haven't looked at the format of an MP3 CD yet but if the
controller needs to be wise to a different format, you will not be able
to convert a normal CD player.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org