Fraunhofer IIS: Netflix Now Streaming with Fraunhofer's xHE-AAC Audio on Android Mobile Fraunhofer IIS, primary developer of the xHE-AAC audio codec, today announced that Netflix is now using the xHE-AAC audio codec. Netflix has licensed Fraunhofer's high-quality xHE-AAC software and is using it to encode its entire catalog of TV series, documentaries and feature films across a variety of genres and languages. One of the key features of xHE-AAC for Netflix is the mandatory MPEG-D loudness and dynamic range control metadata. It allows service providers to embed content- and endpoint-specific metadata in the audio bit stream for transmission which can then be used on the playback side to achieve a consistent loudness level and optimal dynamic range for any playback device and environment. In a living room environment, a film can be enjoyed with the full dynamic range, the way that the mix was intended. The same film on a mobile device in a noisy environment might call for loudness management in order to be enjoyed with intelligible dialog. With MPEG-D metadata, a single stream meets the needs of both of these use cases -- and everything in between.