Vector quantization of scale factors in Advanced Audio Coder (AAC)

被引：0

作者：

Sreenivas, TV ^{[1
]}

Dietz, M ^{[1
]}

机构：

[1] Fraunhofer Inst Integrated Circuits, Audio Multimedia Dept, D-91058 Erlangen, Germany

来源：

PROCEEDINGS OF THE 1998 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, VOLS 1-6 | 1998年

关键词：

D O I：

暂无

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper describes some experiments to reduce the load of side information in the MPEG AAC scheme using vector quantization (VQ) methods. The VQ replaces the existing differential and entropy coding of the scale factors. Various types of Ve are considered, such as subvector VQ, multi-stage VQ and tree-structured VQ which provide some advantages in the context of MPEG-4 AAC characteristics such as scaleability etc. However, the VQ being a lossy compression scheme, psycho-acoustic sensitivity of the losses is very important. These are studied using objective measures such as NMR and listening tests to make proper choices for the VQ design.

引用

页码：3641 / 3644

页数：4

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