AES E-Library

A New Backward Predictor for MPEG Audio Coding

In MPEG-2 advanced audio codec (AAC), a second-order backward adaptive lattice structure predictor is used for removing the redundancy of each spectral component. Although it enhances the performance of the audio codec significantly, this backward predictor requires a large amount of computations and memory. In this paper, a new backward prediction scheme is proposed to reduce the complexity of the adaptive lattice algorithm. Instead of using traditional adaptive algorithms, the backward predictor is found by block linear prediction (LP) analysis. The distinct advantage of the new scheme is that the performance and computational complexity can be balanced by less frequently updating the predictor coefficients. Our preliminary experimental results show that the new backward predictor gives better or almost the same performance while requiring less complexity than the adaptive lattice algorithm.

Authors: Yin, Lin; Suonio, Mikko; Vaananen, Mauri
Affiliation: Nokia Research Center, Tampere, Finland
AES Convention:103 (September 1997) Paper Number:4521 Import into BibTeX
Subject:Low Bit-Rate Coding Technology

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 aes14)   /pp9798/pp9709/4411.pdf

Start a discussion about this paper!