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Convention Paper

Efficient Coding of Excitation Patterns Combined with a Transform Audio Coder

Authors: Edler, Bernd; Niemeyer, Oliver

AES Convention 118 · Paper 6466 · May 2005

Abstract

An efficient encoding of excitation patterns designed for bit rates between 4 and 10 kbit/s is presented. It is based on a two dimensional transform of the excitation patterns in frequency and time direction, followed by a bit plane encoding of the resulting transform coefficients. The bit plane encoding ensures, that all significant coefficients are captured, both for excitation patterns resulting from more tonal and transient like audio signals. In such a way, coded excitation patterns can be used in a scalable noise coder, but also can substitute the scale factors, which usually control the quantisation in subband/transform audio coders. A subband/transform audio coding scheme is presented, which combines these two applications in one system.

Details

Published in
AES Convention 118
AES Convention
118
Paper number
6466
Publication date
May 6, 2005
Session subject
Low Bit Rate Audio Coding (Research)
Affiliation
University of Hannover (See document for exact affiliation information.)
Type
Convention Paper