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MPEG-4 Low Delay Audio Coding Based on the AAC Codec

Perceptual audio coding is known to deliver high sound quality even at low bit rates for a broad range of audio signals. However, the total delay of the encoder/decoder chain is usually considerably higher than acceptable for two-way communication applications, such as teleconferencing. This paper discusses the primary sources of algorithmic delay in a perceptual audio codec and describes an MPEG-2 AAC-derived codec which was optimized for very low delay and accepted as the baseline of development for low-delay coding in MPEG-4 version 2 audio.

Authors: Allamanche, Eric; Geiger, Ralf; Herre, Juergen; Sporer, Thomas
Affiliation: FhG-IIS, Erlangen,Germany
AES Convention:106 (May 1999) Paper Number:4929 Import into BibTeX
Subject:Audio Coding

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E-Library Location: (CD aes15)   /pp9900/pp9905/4904.pdf

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