http://www.3gpp.org/ftp/specs/html-info/26-series.htm

I am wondering what is the license regarding this source code. I looked at the docs and the source code, but did not found any license description.
Anyone know what are the licensing terms and where to find them?

Using aacPlus v2, even in 3GPP rel6 audio or under the name of HE-AAC v2, requires a license to patents owned by Coding Technologies and Philips, which is available through Coding Technologies.

Regards,
Oki

EDIT: I am not sure about AMR-WB+ licensing.

I was wondering about the license regarding source code (ie copyright), not the license regarding technology (ie patents)

Since CT is developing the code, you just have to ask them through their mailbox 3gpp-support@codingtechnologies.com for 3GPP related questions. If you get something from them please share the info

Regards,
Oki