High-Efficiency Advanced Audio Coding (HE-AAC) is a lossy data compression scheme for digital audio defined as a MPEG-4 Audio profile in ISO/IEC 14496-3. It is an extension of Low Complexity AAC (AAC LC) optimized for low-bitrate applications such as streaming audio. HE-AAC version 1 profile (HE-AAC v1) uses spectral band replication (SBR) to enhance the compression efficiency in the frequency domain. HE-AAC version 2 profile (HE-AAC v2) couples SBR with Parametric Stereo (PS) to enhance the compression efficiency of stereo signals. It is a standardized and improved version of the AACplus codec.
HE-AAC is used in digital radio standards like DAB+ and Digital Radio Mondiale.
Read more about High-Efficiency Advanced Audio Coding: History, Perceived Quality, Standards
Famous quotes containing the word advanced:
“Among the earliest institutions to be invented, if I read the stars right, is a Protestant monastery, a place of elegant seclusion where melancholy gentlemen and ladies may go to spend the advanced session of life in drinking milk, walking the woods & reading the Bible and the poets.”
—Ralph Waldo Emerson (1803–1882)