xxargs
Joined: 28 Jul 2002
Posts: 231
Helped: 44
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 12 Aug 2006 10:37 Re: A law and µ law.. |
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| brahma wrote: |
| i want to know is there any difference between µ law and A law. if yes what is that?? |
Yes - have small different shape of logaritmic compression in A/D-convertes.
differences is not enough for disturbe peoples talking if you use µ-law in end and a-law in other end on analoge or digital line, but kill modem trafic above 4800-9600 'baud' ...
Modems must use same µ or A-law as Phone station for high speed communication (difference give so much unlinear intermodulation as modem cannot handle this).
If you have 12 bit, possible 14 bit AD/DA-converter, you can use look up table to convert between format (methode used on modems), but impossible to convert properly if you frontend have fix 8 bit A or µ-law AD-converter.
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