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A method for converting Analog DAA (Data Access Arrangement) into digital signals is PCM (Pulse-code modulation). How does it work?

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  • Anonymous
    6 years ago

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  • Anonymous
    9 years ago

    HI axel

    it would take several volumes to explain it sorry to say, but it is a question of sampling an analogue signal and reading it's value converting it into a binary number which is transmitted with in the case of the european system 29 other signals down a coaxial or optic fibre to be received and decoded back into analogue signals.

    the sampling rate needs to be at twice the highest audio frequency so sampling at some 8khz is about right for speech in the speech band of 300hz to 3.4khz.

    this method is called time division multiplexing so as i say a lot of reading jimmy wales does cover it in some detail on wikipedia so don't forget to donate to him.

    Source(s): ex telecommunications engineer this system is used on cd roms and dvd and also with mobile phones to transmit so much data of the airwaves even digital TV.
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    6 years ago

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