2 years ago
Has anyone done control bit manipulation in a SPDIF sound stream?
I'm looking at different ways of doing this, but I wanted to see if anyone has done it and what method you used. Cablevision seems to be "locking" the sound stream in the optical output so I can no longer feed it to my PC, and I don't like using the RCA analog outputs.
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M$1 Answer
Decode the SPDIF stream to IIS using a TI DIR9001 or similar chip. The IIS stream will not have the control bits - just audio data. Encode the IIS back to SPDIF using a TI DIT4096 or similar chip. You can tell the DIT4096 how to set the control bits in the SPDIF stream.
source(s):
TI DIR9001 digital audio receiver: http://focus.ti.com/docs/prod/folders/print/dir9001.html
TI DIT4096 digital audio transmitter: http://focus.ti.com/docs/prod/folders/print/dit4096.html
TI DIR9001 digital audio receiver: http://focus.ti.com/docs/prod/folders/print/dir9001.html
TI DIT4096 digital audio transmitter: http://focus.ti.com/docs/prod/folders/print/dit4096.html
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M$
Simple enough it is brilliant! Thanks for the reply and for introducing me to these chips.