DRM系统中的音频编解码及算法优化
Audio Codec and Algorithm Optimization in DRM System
张乐萌1
作者信息
- 1. 云南省广播电视局曲靖691台,云南 曲靖 655000
- 折叠
摘要
世界数字广播(Digital Radio Mondiale,DRM)是数字调幅广播的国际标准,其信息媒介为音频信号.介绍DRM系统中广泛采用的MPEG-4高级音频编解码(Advanced Audio Coding,AAC)标准及相关算法,包括心理声学模型、滤波、量化、无噪声编码及时域噪声整形的实现原理,分析音频解码的基本流程.在工程应用阶段,为了优化硬件接收器的设计方法,利用C++语言编写接收器软件,用于模拟硬件设备的功能.经测试,该软件工具能够有效解码DRM音频信息.
Abstract
Digital Radio Mondiale(DRM)is an international standard for digital amplitude modulation broadcasting in which the information medium is audio signals.This paper introduces MPEG-4 Advanced Audio Coding(AAC)standard and related algorithms widely used in DRM system,including the implementation principle of psychoacoustic model,filtering,quantization,noiseless coding and time domain noise shaping,and analyzes the basic flow of audio decoding.In the engineering application stage,in order to optimize the design method of the hardware receiver,the receiver software is written in C++language to simulate the function of the hardware device.After testing,the software tool can decode DRM audio information effectively.
关键词
世界数字广播(DRM)/音频编解码/应用优化Key words
Digital Radio Mondiale(DRM)/audio codec/application optimization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据