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中文摘要：
耳机“头内定位”现象会产生不自然的声场,引起听觉疲劳。为此,本文设计并实现了具有房间混响效果的“头内定位”立体声增强系统,使用头相关传递函数（HRTF）对信号滤波,并加入混响,以模拟房间内的立体声扬声器,产生“头内定位”声场,使听觉感受更加自然,从而有效地解决了“头内定位”问题;同时,为了减少声场增强系统的存储量和计算复杂度,本文用共声学极点/零点模型（CAPZ）表示HRTF,并简化混响生成算法。最后,本文在Blackfin533 DSP上对声场增强系统进行了具体实现。实验结果表明,该系统所需的存储空间小,计算复杂度低,能对立体声音频信号产生良好的空间增强效果。
英文摘要：
The headphone ＂in head＂ localization yields unnatural acoustic fields and causes listening fatigue. An ＂out of head＂ stereo enhancement system for headphone is therefore designed, which renders out of head localization by simulating virtual loudspeakers in the room by HRTF filtering and adding slight reverberation. Thus a more natural ＂out of head＂ sound field is generated to solve the ＂in head＂ localization problem efficiently. The memory and computation consumptions are further reduced by representing HRTF with CAPZ models and simplifying reverberation algorithm. The system is implemented on the Blackfin533 DSP platform. Experiment results demonstrate that the system can achieve excellent spatial enhancement effect for stereo audio with low computational cost and a small amount of memory.
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Head-related transfer function interpolation through multivariate polynomial fitting of principal co
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