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Per wikipedia://GSM… GSM has used a variety of voice codecs to squeeze 3.1 kHz audio into between 6.5 and 13 kbit/s. So that is between 100k and 200k bytes pe
by jws 16y ago
Per wikipedia://GSM…
GSM has used a variety of voice codecs to squeeze 3.1 kHz audio into between 6.5 and 13 kbit/s.
So that is between 100k and 200k bytes per minute of speech. That gigabyte is the same radio load as 10000 minutes of talk time.
Where does one get 10000 minutes of talk time for only $20?
I think the question is Why is wireless voice so bloody expensive‽
- danilocampos 16y ago(Pedantic) Verizon uses CDMA, not GSM, but the question is still a fair one. I wonder how the numbers change for CDMA, if at all.
- jws 16y agoWikipedia says CDMA uses 3 rates, 8.5kbps, 4kbps, and 0.8kbs at the sender's choosing. It averages about 6kbps, so the numbers are about the same. There are improved codecs, but I can't tell if they are in use. The 0.8kbps is just for encoding background noise when the person is not talking.
- sparky 16y agoObviously this doesn't even begin to explain it, but the realtime/quality-of-service requirements of voice are much more rigid, so it makes sense that voice would cost the carrier more per-bit than data. But still...