| 摘要: |
| 由于3G移动信道环境严酷，带宽资源有限，为了实现低码率、高质量的音频信号传
输和重建，在研究现有语音/音频带宽扩展技术的基础上，提出了一种基于EAAC+编码标准的
改进移动音频编码算法。该算法通过检测并去除短暂态信号带来的正弦分量，从而降低计算
的复杂度，实现传输信道带宽的扩展，并保证重建音频信号的音质。 |
| 关键词: 3G通信 移动信道 音频编码 带宽扩展 |
| DOI： |
|
| 基金项目:国家自然基金重点项目（60832002）；湖北省教育厅科研重
点项目（D20101704） |
|
| Improved Mobile Audio Bandwidth Extension Algorithm |
| ZHANG Cong |
| (Department of Computer and Information Engineering，Wuhan Polytechnic Universi
ty，Wuhan 430023，China) |
| Abstract: |
| The environment of 3G mobile channel is complex and the wireless t
ransmission frequency band resources are limited.In order to achieve the t
ransmission and reconstruction of low bit rate and highquality audio signal, a
mo
dified EAAC+mobile audio coding algorithm based on the existing technology of sp
eech or audio bandwidth extension research is presented in this paper. The algor
ithm can reduce the computational complexity, achieve the bandwidth extension of
transmission channel, and ensure the tone quality of reconstructed audio signal
by detecting and removing the sinusoidal component of short transient signal. |
| Key words: 3G communication mobile channel audio coding bandwidth extension |
