On the following page you can download free evaluation versions of the Fraunhofer IIS MPEG-4 player and the Fraunhofer IIS MPEG-4 encoder and server. These evaluation versions are for personal and non-commercial use and are intended to promote the MPEG-4 standard and to demonstrate the MPEG-4 technologies available at Fraunhofer IIS. In trying to cover a broad range of application scenarios, the MPEG-4 audio coder includes coding tools from several different coding paradigms, such as parametric audio coding, synthetic audio, speech coding and subband/transform coding. Within this comprehensive "tool box" the high-quality part of the MPEG-4 audio functions will be covered by the so-called "General Audio (GA)" coders. In a GA coder, the input signal is first decomposed into a time/frequency (t/f) spectral representation by means of an analysis filterbank, which is then subsequently quantized and coded. The core part of the MPEG-4 audio GA coder is based on MPEG-2 AAC technology which is complemented by a number of additional coding tools. In this way, both specific MPEG-4 functionalities (like scalability) are added and further enhancement in coding performance is achieved. The Fraunhofer IIS has been the key contributor in the progression of MPEG-2 AAC technology towards the MPEG-4 system. Download