基于Windows平台的音效增强系统设计与实现

针对消费电子类产品中扬声器体积小型化所导致的低频重放能力有限、动态范围较小、频响曲线不佳、声场过窄等问题,开发了iSurround音效增强算法,包括扬声器均衡、图示均衡器、立体声增强、虚拟低音、动态范围压缩和自动音量控制等.在Windows平台上以虚拟声卡的形式实现该算法,最后运用主观听音实验的方法,证明了iSurround音效增强算法在低音表现力、声场宽度、空间环绕感等方面有明显提高.同时,也与目前主流音效算法就行了比较.

Design and implementation of an audio enhancement system based on Windows platform

For consumer electronics products, the limited size of loudspeakers leads to lots of problems, such as limited bass reproduction capability, small dynamic range, poor frequency response, narrow sound width, etc. To address these problems, we developed iSurround audio enhancement algorithm, including loudspeaker equalization, graphic equalizer, stereo enhancement, virtual bass, dynamic range compression, automatic gain control and so on. And we also implemented this algorithm on the Windows platform. The developed software system can capture the audio stream that would be sent to the sound card driver from Windows kernel. The audio stream was processed by the audio effect system and then sent to the sound card. Finally, subjective listening experiments were carried out to prove that iSurround audio enhancement algorithm have a significant improvement in bass reproduction capability, sound width and spaciousness. And we also made a comparison with mainstream algorithms.