stereo transmission

Discussion in 'General Electronics Chat' started by davyna, May 17, 2013.

  1. davyna

    Thread Starter New Member

    May 15, 2013
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    how can i transmit two audio channel in digital scheme using single optical fiber? please help me!!
     
  2. crutschow

    Expert

    Mar 14, 2008
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    Use a TOSLINK transmitter and receiver such as found here.
     
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  3. davyna

    Thread Starter New Member

    May 15, 2013
    13
    1
    thank! but all that TOSLINK transmiter are module, me i want to start from circuit design
     
  4. crutschow

    Expert

    Mar 14, 2008
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    So you need a two channel serial time-division multiplexer. Typically you would convert the analog signals to digital words at a rate sufficient to exceed the Nyquist minimum for the highest audio frequency of interest. Then you would send a sync word, then the channel 1 digital word, then the channel 2 digital word, then repeat.
     
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  5. davyna

    Thread Starter New Member

    May 15, 2013
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    how about synchronization at the receiving end? since there is no way to send a separate clock via optical fiber..
     
  6. nsaspook

    AAC Fanatic!

    Aug 27, 2009
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    JMW and davyna like this.
  7. davyna

    Thread Starter New Member

    May 15, 2013
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    how about the technique of multiplexing and demultiplexing of the two channels?
     
  8. crutschow

    Expert

    Mar 14, 2008
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    That multiplexed signal is what is transmitted by the Manchester code.
     
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