CDMA audio codecs

by no2chem 19. June 2009 19:46

It’s been awhile since I’ve played with QPST, but there are several interesting codec settings I didn’t notice before:

evrc

EVRC is an old audio codec.. more than 10 years old, (I think its circa 1995). I guess old standards live long… although it seems to me that the newer equipment that carriers have been putting in should support the newer standard, after all – these new codecs are designed to be both higher quality and more efficient.  I haven’t done much testing on it, but I think I can say that Sprint seems to have SMV at least enabled and working – it seems that SMV gets better audio quality and clarity vs EVRC. 4GV is Qualcomm’s newest codec – so I’m not sure if the support is there. 4GV comes in two formats, NB (Narrowband) and WB (Wideband). I’m guessing WB gives better quality at the cost of bandwidth. You can set these settings in QPST, if you have the phone’s SPC code. Hopefully someone with a better ear for quality can test and try this out, and maybe report the results.

Tags:

Bookmark and Share
Permalink | Comments (12) | Post RSSRSS comment feed

Comments


United States t0mmyr 
June 3. 2009 05:51 | Reply
t0mmyr
It's probably best to test this out with some high quality headphones, would this affect sound quality for phone calls as well? In & outbound?

June 6. 2009 08:01 | Reply
Mutiny32
@t0mmyr, I can easily notice this with the stock headset earpiece. Not the headphones, the earpiece itself. And it isn't just a placebo effect. It's really THAT MUCH better sounding.

I'm going to test this on an international call, that will be my ultimate test. Kansas to Finland.



Canada OrBy 
June 6. 2009 04:55 | Reply
OrBy
You do not need the QPST software to play with these options. If you have your MSL already you can modify these settings directly on the phone from ##778# on the CDMA Setting page. You also have to remember that the providers tower also can force your phone to what ever codec it wants as long as the phone supports it so your changes may have no effect.


June 6. 2009 07:58 | Reply
Mutiny32
Changed it to SMV, as PST on my Sprint Touch Pro doesn't have the option for 4GV unless it has a different name. Called someone on a landline to test it out, they said I sounded MUCH better than before, they said I always sounded "tinny" and now I'm clear, more full sounding. I could also noticeably hear the sound quality of the call. Maybe this is the reason why I've always thought my T-Mobile BlackBerry Pearl had the best call quality of any phone I've ever had, since it used AMR, a 13-bit codec vs EVRC, a 8-bit codec.

Damnit Sprint, if your network and phones fully supports superior technologies, use them. You are shooting yourself in the foot. I've always wondered why CDMA, even though superior, had worse voice quality then the GSM phones I've used. I just assumed it was the handset and mic/speaker themselves. But now I am convinced it is just because an ancient voice codec is used vs GSM's voice codec.


June 6. 2009 08:11 | Reply
Mutiny32
Just found out that if you use PST on the phones to change this, EVRC-B on the phone is a part of the 4GV Suite. Not sure if it works or not on Sprint, testing.

July 14. 2009 09:22 | Reply
Cobaltikus
What were your test results? Is EVRC-B what you use now over all the other options?



United States Joseph 
June 24. 2009 18:51 | Reply
Joseph
How do I get my MSL for my Touch pro?  I would really like to try this out.

July 14. 2009 09:21 | Reply
Cobaltikus



October 10. 2009 10:52 | Reply
ed hardy clothes
i like


October 16. 2009 17:26 | Reply
tiffany jewelry
good


November 21. 2010 09:07 | Reply
pingback
Pingback from viraltwitterprofits.info

Best Recipes to Win Back Lost Love | viraltwitterprofits.info


November 7. 2011 20:00 | Reply
ghd
Popular in 2010 remains the most popular hairstyle within the curly hair curly hair, especially the Malay hair wild hair much more sought after by the most of the younger GHD Straighteners millimeters, and so on. Cold winter season, pick a powerful manner along with cutting hair is completely beautiful tiny confront as well as hot. Romantic winter, this specific unfastened curly hair http://www.nzhairstraightener.org women head of hair make, which is suitable for sweet dates, brown hair and also head of hair artists possess produced an in-depth a sense pure comfortable environment. Thicker fringe of hair perm, deliver real tastes regarding pretty area, huge round eyes to manage much more attractive apple company. Red-brown head of hair a lot more fashionable.

Add comment


(Will show your Gravatar icon)
Type If you can out:

  Country flag

biuquote
  • Comment
  • Preview
Loading



Disclaimer
Windows Mobile is a registered trademark of Microsoft Corporation in the United States and other countries.

Wei Enterprises is not affiliated in any way with Microsoft, HTC, Sprint, or any other wireless carrier/phone manufacturer otherwise mentioned on this site.

� Copyright 2012 2009 Wei Enterprises