SPDIF or AES/Ebu interface

[The Proteus]

Michael,

	This would be best accomplished using an FPGA or a PLD of some
sort. If you look at any of the data formats, you should be able to
develop a shift register that will decode the audio from a stereo
bitstream with little overhead. The easiest way would probably be with an
I2S format or something similar that's well documented and everyone uses.
Since it's MSb first, all you have to do is clock the data into D23 first,
etc.. etc.. etc..., then latch it to the output when the word clock
transitions. 

Hope this helps,

The Proteus

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On Thu, 31 Aug 2000, Michael Buchstaller wrote:

> Hello Group,
> 
> i am in the process of building a tube-based DAC. First experiments with
> a 8-bit-version vonnected to a PC´s parallel ports look promising.
> 
> But i want to have a digital input via SPDIF (or the like), so i could connect a
> CD player or other gear directly.
> Having looked at various data sheets of SPDIF decoder IC´s, i am very
> confused. Is there anything out which would allow me to simply convert the
> serial data stream into a parallel one ? It seems that all the IC´s are designed
> to be interfaced to a MPU or at least to a DAC IC with serial input.
> 
> I would really want to avoid a provessor to do this task; any hardware solution
> would be preferred.
> Does anybody out there have experience in this field ? Specially,which decoders
> are working fine, and which ones are better avoided ?
> 
> TIA !
> 
> 
> -Michael Buchstaller
>