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Issue No. 02 - April-June (2013 vol. 20)
ISSN: 1070-986X
pp: 72-78
Schuyler Quackenbush , Audio Research Labs
The MPEG Audio Subgroup has a rich history of accomplishments in creating music coding technology. At higher bit rates, MPEG technology can represent arbitrary sounds, including the human voice, with excellent quality. MPEG-1 and MPEG-2 Audio coders use perceptually shaped quantization noise as the primary tool for achieving compression. The MPEG-4 High-Efficiency Advanced Audio Coding (AAC) standard is a single technology capable of compressing speech, speech mixed with music, or music signals with quality that is always at least as good as the best of two state-of-the-art reference codecs, one optimized for speech and mixed content (AMR-WB+) and the other optimized for music and general audio (HE-AACv2). This article provides an overview of the USAC architecture and summarizes the performance relative to the best state-of-the-art speech and audio codecs.
Music, Coding, MPEG standards, HE-AACv2, multimedia, multimedia applications, MPEG, MPEG-4 High-Efficiency Advanced Audio Coding (AAC) standard, audio codecs, music coding technology, compressed speech, AMR-WB+

S. Quackenbush, "MPEG Unified Speech and Audio Coding," in IEEE MultiMedia, vol. 20, no. , pp. 72-78, 2013.
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