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Discussion Groups | Speech Coding | Query: 13 bit PCM ?
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
Query: 13 bit PCM ? - jay_coep - Dec 14 6:34:00 2004
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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 |
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Re: Query: 13 bit PCM ? - Miguel Arjona Ramírez - Dec 14 17:49:00 2004
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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 |
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