Which format has best audio quality, GSM or CDMA

[rew]

Since analog cell phones are gone which digital format will give the best audio quality without a codec, GSM or CDMA. I have been told the codec units work better with GSM. Anyone have any comments on this.
Thanks

 

[busyradioguy]

Unless you are outside the U.S., forget about codecs on GSM. The few cell providers in the U.S. that offered GSM, have done away with it.

 

[LA_Guy]

It's a toss up. Both formats have 8 bit resolution and 8 kHz sampling, which gives you a dynamic range of about 48 db and a frequency response of 4 kHz max.

Neither AT&T nor T Mobile offer codec compatability any more-so you're screwed there. Take cellular for what it is-crap voice quality, nothing more.
If you need fidelity, go 3G Internet, but beware that they all now have 5 gb monthly caps (Sprint begins theirs in June).

 

[CW]

Unless you are outside the U.S., forget about codecs on GSM. The few cell providers in the U.S. that offered GSM, have done away with it.

AT&T is GSM, so is T Mobile....Verison is mixed, Sprint is CDMA all the way....personally I like CDMA. It sounds clearer and less delay (in my experiences with Sprint vs GSM phones)...
GSM is an improved version of TDMA....and hence MOST carriers in the US DO use it....(my AT&T phone is GSM)

 

[busyradioguy]

Unless you are outside the U.S., forget about codecs on GSM. The few cell providers in the U.S. that offered GSM, have done away with it.

AT&T is GSM, so is T Mobile....Verison is mixed, Sprint is CDMA all the way....personally I like CDMA. It sounds clearer and less delay (in my experiences with Sprint vs GSM phones)...
GSM is an improved version of TDMA....and hence MOST carriers in the US DO use it....(my AT&T phone is GSM)

Oooops! My bad. That's what I get for posting when sleepy. ;D

I should have said they are eliminating Circuit Switched Data, which is the technology that allowed use of audio Codecs over wireless cell phones. Here's the info from the Comrex site:

http://www.comrex.com/products/matrix_codec.htm

In the US, T-Mobile and Cingular were offering this service, however recently they have been discontinuing the Circuit Switched Data service without warning. It has become increasingly difficult to reliably obtain CSD service or to be able to rely on this service for broadcasts and Comrex can no longer recommend this service in the US.

 

[OKCRadioGuy]

"....beware that they all now have 5 gb monthly caps (Sprint begins theirs in June)"

Do you have a link with this info I could read? I surely don't want to pay for a nice new phone and change up service if they're going to be THAT way about data. I'm trying to figure out what's worse: Oil companies, used car dealers, snaky lawyers, or damn wireless carriers! Recently the wireless carriers and the oil industry are right at the top of my S-list!

 

[techie2]

5GB caps? So much for buying that Comrex or Tieline IP codec and expecting to use it for ball game feeds.

I hate cell remotes. I volunteer doing high school sports for LPFM and cell remotes are the only option when we are out of Marti range. They always wind up sounding like crap. We tote a 1000' spool of phone wire wound up on one of those orange extension cord holders because I'd rather lay a couple hundred feet of phone line to get a land line than to air a game on cell.

 

[LA_Guy]

"....beware that they all now have 5 gb monthly caps (Sprint begins theirs in June)"

Do you have a link with this info I could read? I surely don't want to pay for a nice new phone and change up service if they're going to be THAT way about data. I'm trying to figure out what's worse: Oil companies, used car dealers, snaky lawyers, or damn wireless carriers! Recently the wireless carriers and the oil industry are right at the top of my S-list!

Here-and it's their EVDO that's bering capped:

http://www.**********.com/shownews/Sprint-Defends-New-5GB-EVDO-Cap-94771

 

[busyradioguy]

Statistical freak? Gluttonous ways?

Are they SERIOUS???

Man Sprint's gonna run themselves out of business from calling their customers names like that. Unbelieveable!

 

[RealityCheckr]

I too prefer Sprint's quality of T-mobile's GSM.

That said, for some time GSM has supports multiple voice codecs, so depending what is in your phone, and what is in the towers where you use your phone, your mileage may vary. My previous Siemens phone allowed you to access this list of codecs supported.

Sprint seems to be continuing it's customer unfreindly policies with this latest move. Their support has always been terrible.

I know several broadcasters that were approached by Sprint suggesting they could use Sprint mobile broadband as an alternative to broadband for things like STLs!

Unless you are outside the U.S., forget about codecs on GSM. The few cell providers in the U.S. that offered GSM, have done away with it.

AT&T is GSM, so is T Mobile....Verison is mixed, Sprint is CDMA all the way....personally I like CDMA. It sounds clearer and less delay (in my experiences with Sprint vs GSM phones)...
GSM is an improved version of TDMA....and hence MOST carriers in the US DO use it....(my AT&T phone is GSM)

 

[techie2]

I know several broadcasters that were approached by Sprint suggesting they could use Sprint mobile broadband as an alternative to broadband for things like STLs!

Eeeek...I'm loath to trust anything using a public network for mission critical applications. Even a private link using T1 radios worries me a little, just because you get no guarantees in those ISM bands.

 

[biamp]

I hate cell remotes. I volunteer doing high school sports for LPFM and cell remotes are the only option when we are out of Marti range. They always wind up sounding like crap. We tote a 1000' spool of phone wire wound up on one of those orange extension cord holders because I'd rather lay a couple hundred feet of phone line to get a land line than to air a game on cell.

Well sometimes that's the best you can do for the money involved. When you are small market cost is important. We use a CDMA carrier and experience no drop outs in our area. Now what I would really like answered is the sample rate question. As I understand it the cell tower is able to control the sampling rate of your call based on tower traffic. I understand this to be true for CDMA as well as GSM. Is it possible for the carrier to "lock in" a cell phone number to full rate sampling codec.

 

[OKCRadioGuy]

So much for my move to Sprint as a provider....

It wouldn't hurt my feelings if the majority of these carriers out there would go broke. Most deserve all the bad that is comes their way.