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Wide band audio on mobile phone/voip. (live broadcast)

X

xon

Hi Guys,

First off all sorry for my bad english and I hope I can explain myself ;D

Our (regional/local) radiostation (like many stations here in the Netherlands) are running on a very low budget. Nothings wrong with that because you learn to get everything out of everything. With that thought I am searching over the net for weeks now to find a solution for something.

What I want:

I 'm looking for a solution to do live realtime interviews/reporting with wide band audio everywhere we want. The idea is to do that with "my' mobile phone that is running on mobile 6.1 and a flat free 3G/UMTS (fast internet f(or the US guys)). The speed is 192 Kbps down and 32 kbs so enough for compressed audio. In my case I use a Samsung Omnia (i900)

With a spare data connector I made a solution to plug on a normal microphone and headphone and this works very wel BUT ofcourse GSM/Smallband audio.

So I want to get rid of the small band audio and want to use Wide band audio quality!

For this there are soms solutions like http://www.luci.eu/ not VERY expensive but it's much more fun to find something out that free but thats my opinion ;)


SO my search begins with trying several VOIP application that are working on a mobile 6 phone (pocket pc). (skype, fring, sjphone). It sounds much better then GSM but still not wide band like normal audio. The reason for this is that almost all programs don't let you choice the codec that is beeing used to set up a program. So it will play save and downgrade the quality.

There are some free wideband codecs like speex, open AMR-WB/G.722 etc but I never found one of these in voip applications that also works on my phone. And most important that I can choice if I want to use it.

Soooo...after weeks of searching and trying things I still not have found what I want! :mad: :-\
So my last hope is this board!

Maybe someone has already been here and (important) done that!..or knows a good voip solution or other p2p possibility.

REAALY hope to hear from you

Some links:

http://www.voiceage.com/freecodecs.php
http://www.speex.org/
http://en.wikipedia.org/wiki/Wideband_Audio
http://en.wikipedia.org/wiki/AMR-WB
 
I have been looking for a good solution for sports remotes when I can't get a land line or Marti shot. Right now we feed the games via cell phone but the audio is horrid. Some of the schools now have wi-fi service or I can tether a 3g cell phone to my laptop.
 
The only option I can think of is to use the phone as a modem for a laptop Internet access, then us a VoIP application.

I have played around with TeamSpeak (www.teamspeak.com), an application that allows you to set up a private server, and attach via a small & flexible client. It supports the following protocols (in descending quality, according to their website).

Speex25.9 > Speex19.5 > Speex16.3 > Speex12.3 > GSM16.4 = GSM14.8 > Speex9.3 > Speex7.2 > WinCELP5.2 > Speex5.2 > CELP6.3 = CELP5.1 > Speex3.4

I've found that the quality can be very good, but latency can be an issue. Best of all, it's free to try, and pretty cheap for commercial use. Plug a USB mic, or USB mic adapter in, and you're good to go - with talkback as well.
 
Hi

The thing is..if I use a laptop it's not so hard because there are plenty of ways to get a connection even with small bandwith of the connection.

The challenge for me is not to use extra hardware like a laptop. The codecs are already there and the phones now days are very powerfull..

it must be possible some way :)
 
My best guess would be to get a Android or Iphone. Lots of people are developing apps for these platforms. Great chance someone may take the time to write something just for what you're looking for. What I can make of it it's a potential niche. Or start developing yourself because you can for these platforms. And when the real dutchness comes up in you sell it on the Apple store (for those who don't know dutch people are real trade people, like to have everything for free and sell it for a lot). ;)
 
dutch: lekker ben jij haha. heb veel gehad aan je info op je log overigens. Draaien inmiddels met dspx fm en hebben fijne sound eruit.

;D don't make people smarter then they are..

there is a application for the Iphone that uses wide band codecs and voip but I just won't go for the iphone. It's just nog the phone for me and just bought the omnia. But thats another discussion.

the thing is that there MUST be something that already excists such as a VOIP application only with Wide band support and made for pocket pc/mobile 6 It just MUST be ;D

When using VOIP wide band all problems are over because of the fact that you have a 2 way communication with alsmost no relay.
 
We have had several stations successfully use The Barix Instreamer 100 and Exstreamer 100 to do what you want to do. You set up a public static IP address on the receive end and then set the Instreamer up for DHCP. People have done this several ways with a computer successfully: By using a wifi hot spot, by using a 3G card plugged into the computer and by plugging a cell phone into the computer's USB port. They turn on Internet connection sharing in the laptop and run a crossover cable between the Instreamer and the computer. In this way you can even use AIM for messaging and/or skype for talkback.
 
Comrex now has the Bic-Link which does HE-AAC. It looks pretty interesting and I'm curious whether it would work as a hardware encoder to feed a streaming server like Darwin or Wowza. Orban dropped their software only encoder and the only software choice I can find now is Adobe Media Encoder with the MainConcept AAC plugin.
 
Hi guys,

We already use a barix set for broadcasting from location..and if I use a laptop there is no problem. The thing is that I want to do it without a laptop ;D Like I said, now days the phones are so powerfull that they can easy encode a transmission.

Yesterday I've experimented with a normal VOIP client om my mobile6/pocket pc and it just worked fine and it's better quality then a normal phone but still small band....I want widdde band @#%@#$@#$ ;D
 
Xon,

Your logic is correct. However I suspect you are a bit too far ahead of the curve on this. To make this work you would need the following to come into place:

1) IP based mobile phone with AMR-WB
2) IP mobile network
3) VoIP Telco
4) VoIP Phone/PBX with AMR-WB

:)

Take a look at the Telephone Interfacing chapter of the NAB Broadcast Engineering Handbook 10th edition for Steve Church's thoughts on this subject.

Keep working on this and keep us all posted.
 
I'm sure Leif is reading along. He seems keen on writing code for Windows. If Windows Mobile isn't much different maybe he can wrap something together in like a night or so. Ask him when he's coming to our small country on the dutch processing day provided you will be there also. I know you want it for free preferably but maybe he'll do it for a small fee. Looks like more people are struggling with this.
 
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