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Convention Paper

An Enhanced SBR Tool for Low-Delay Applications

Authors: Werner, Michael; Schuller, Gerald

AES Convention 127 · Paper 7876 · October 2009

Abstract

An established technique to reduce the data rate of an audio coder is Spectral Band Replication (SBR). The standard SBR tool is made for applications where encoding/decoding delay is of no concern. Our goal is to obtain an SBR system with little algorithmic delay for use in realtime applications, such as wireless microphones or video conferencing. We already developed a low delay SBR tool (LD-SBR) but it produces a relatively high amount of side information. This paper presents an enhanced SBR tool for low delay applications which uses techniques from LD-SBR in combination with Codebook Mapping (CBM). This leads to an enhanced low delay SBR tool with a reduced amount of side information but without degrading audio quality.

Details

Published in
AES Convention 127
AES Convention
127
Paper number
7876
Publication date
October 6, 2009
Session subject
Data Compression
Affiliation
Ilmenau University of Technology, Ilmenau, Germany; Fraunhofer IDMT, Ilmenau, Germany (See document for exact affiliation information.)
Type
Convention Paper