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Query: 13 bit PCM ?

Started by jay_coep December 14, 2004


Hello,

Can anybody please help explaining why GSM speech codecs (atleast
HR,AMR) prefer 13 bit uniform PCM encoding ? I mean what is so special
about '13' (Anything to do with SNR for speech signal?)

Thanks in anticipation.

Regards,
Jaydeep




Hello Jay,

The range of 8-bit mu law fits end-to-end into the range of 13-bit
uniform PCM. I guess that's the reason behind.

Regards,
Miguel

jay_coep wrote:

>
>
>Hello,
>
> Can anybody please help explaining why GSM speech codecs (atleast
>HR,AMR) prefer 13 bit uniform PCM encoding ? I mean what is so special
>about '13' (Anything to do with SNR for speech signal?)
>
>Thanks in anticipation.
>
>Regards,
>Jaydeep
>