MPEG natural audio coders, as MPEG-1/2 Layer III and MPEG-2/4 AAC, require a great amount of calculation, mainly due to the iterative bit allocation processes proposed by the ISO/IEC technical documentation. This complexity makes difficult a real-time implementation of the normative algorithms. To solve this difficulty, this paper discusses a set of non optimal solutions to reduce the computing load and, based on these solutions, a real-time implementation of a MPEG-1/2 Layer III using a single fixed-point DSP is presented. In addition, techniques to achieve good audio performance and the methods for the adaptation of parameters will be discussed.

Authors: Pena, Antonio; Alexandre, Enrique; Rivas, Begona; Perez, Rafael; Duenas, Alberto
Affiliations: Prodys, Leganés,Madrid, Spain ; E.T.S.E. Telecomunicación. Universidade de Vigo, Vigo, Spain(See document for exact affiliation information.)
AES Convention: 110 (May 2001) Paper Number: 5302
Publication Date: May 1, 2001 Import into BibTeX
Subject: Low-Bit Rate Audio Coding
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=9936

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