A Novel Low Bit Rate Audio Bandwidth Extension Method

被引：0
|
作者：
Hang, Bo [1 ,2 ]
Hu, Ruimin [2 ]
Ma, Ye [2 ]
机构：
[1] Xiangfan Univ, Math & Comp Sci Coll, Xiangfan 441053, Peoples R China
[2] Wuhan Univ, Natl Engn Res Ctr Multimedia Software, Wuhan 430072, Peoples R China
来源：
2009 SECOND INTERNATIONAL SYMPOSIUM ON KNOWLEDGE ACQUISITION AND MODELING: KAM 2009, VOL 3 | 2009年
关键词：
bandwidth extension; audio coding; codebook mapping;
D O I：
10.1109/KAM.2009.33
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
In present communication system, high quality audio signal is supposed to be provided with low bit rate and low computational complexity. This paper proposed a novel audio coding bandwidth extension method, which can improve decoded audio quality with increasing only a few coding bits per frame and a little computational complexity. This method calculate high-frequency synthesis filter by using codebook mapping method, and transmit only quantified gain corrections in high-frequency part of multiplexing coding bit stream. The preliminary test show that this method can provide comparable audio quality with lower bit consumption and computational complexity compared to the high frequency regeneration of AMR-WB+.
引用
收藏
页码：273 / +
页数：2
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