一种基于数字水印技术的音量自动均衡系统

针对数字音频广播系统中使用的节目素材存在音频电平差异大、增大维护工作量的问题进行研究，并提出的一种音频音量自动均衡系统，系统主要由均衡增益值计算、增益值存取、音频均衡实现3个部分组成。通过该系统的实现能有效地解决连续音频的音频突变问题，实现广播电台无人值守播出，大幅降低数字音频广播系统的维护工作量。同时，针对系统中增益存储读取困难的问题，重点介绍了数字水印技术的应用，并实现了增益信息值的无损存储和快速读取。同时避免了对音频素材本身信息的损坏。

A New Audio Volume Adaptive Equalization System Based on Digital Watermark

In DAB（Digital Audio Broadcasting） System, the program＇s materials have big differences between each other in their audio level. And the differences lead to increase system maintenance and the mutation of a continuous audio. Therefore, a new AVAES（Audio Volume Adaptive Equalization System） based on digital watermark and the DirectShow techniques is proposed to solve those problems. This system mainly consists of the calculation of equilibrium＇s value, the storage and reading of this equilibrium＇s value, the realization of audio＇s equilibrium. The AVAES can realize radio broadcast unattended and dramatically reduce the DAB system＇s maintenance At the same time, in order to realize gain information value＇s non-destructive storage and fast loading, digital watermark technology＇s application to avoid the damage of audio＇s critical information during the course of adaptive equalization is discussed.