The audio codec of choice for digital radio and low bit rate Audio and Video streaming applications
xHE-AAC (Extended HE-AAC), the latest upgrade to the MPEG AAC codec family, is the audio codec of choice for digital radio and low bit rate streaming applications. Selected as the mandatory audio codec for DRM (Digital Radio Mondiale), xHE-AAC bridges the gap between speech and audio coding, and provides consistent high quality audio for all signal types, such as speech, music or mixed content.
Another important feature is the codec’s coding efficiency. The audio codec produces excellent sound for both music and speech, delivering high quality performance at bit rates starting as low as 6 kbit/s for mono and 12 kbit/s for stereo services. Thus xHE-AAC streaming apps and streaming radio players may switch to very low bit rate streams and offer a continuous playback even while the network is congested. Once more bandwidth becomes available on the network again, the xHE-AAC client can request a higher bit rate version and seamless switch over the full range of bit rates. Audio bit rate that’s being saved due to the improved coding efficiency can be used to improve video quality.