![]() This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized by appropriate patent licenses. Fraunhofer provides no warranty of patent non-infringement with respect to this software. ![]() NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. ![]() For modified versions of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software and the date of any change. ![]() You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec software or your modifications thereto. The name of Fraunhofer may not be used to endorse or promote products derived from this library without prior written permission. You must make available free of charge copies of the complete source code of the FDK AAC Codec and your modifications thereto to recipients of copies in binary form. You must retain the complete text of this software license in the documentation and/or other materials provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. You must retain the complete text of this software license in redistributions of the FDK AAC Codec or your modifications thereto in source code form. Redistribution and use in source and binary forms, with or without modification, are permitted without payment of copyright license fees provided that you satisfy the following conditions: Users are encouraged to check the Fraunhofer website for additional applications information and documentation. Please note that most manufacturers of Android devices already license these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec software may already be covered under those patent licenses when it is used for those licensed purposes only.Ĭommercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, are also available from Fraunhofer. Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) may be obtained through Via Licensing (or through the respective patent owners individually for the purpose of encoding or decoding bit streams in products that are compliant with the ISO/IEC MPEG audio standards. AAC has been standardized by ISO and IEC as part of the MPEG specifications. AAC-ELD is considered the best-performing full-bandwidth communications codec by independent studies and is widely deployed. This FDK AAC Codec software is intended to be used on a wide variety of Android devices.ĪAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual audio codecs. The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. It should be noted though that if you want to use bitrates above 128 kBit/s, there is no point whatsoever in using HE-AAC, since you won't hear a difference.©Copyright 1995–2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Very expensive, such as digital broadcasting or mobile applications It is thus the first choice for all application scenarios where bandwidth is limited or HE-AAC v2 – the combination of AAC, SBR and PS – is undoubtedly the most powerful audio codecĪvailable today. Preliminary studies show that the compression efficiency of AAC can be Here, you can see the subjective scores (higher is better) for various bitrates.Īnother figure that shows how it results in better quality at lower bitrates: ![]() I can only recommend to look into this 2009 EBU Technical Review for a detailed description. It has been extensively tested, and results suggest that it provides excellent quality even at 48 kBit/s (whereas MP3 only scored as "poor"). HE-AAC v2 (the standardized name of what is "aacPlus v2" as a trade name) supersedes the AAC standard. ![]()
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