AES E-Library

Realtime implementations of MPEG-2 and MPEG-4 natural audio coders

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 Import into BibTeX
Subject:Low-Bit Rate Audio Coding

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes18)   /pp2001/pp0105/110092.pdf

Start a discussion about this paper!