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笔者对MP3所用到的几个关键技术，如子带滤波、心理声学模型、动态噪声分配等做出简明分析。
This paper analyses the key technologies used in MP3, such as subband filter, psychoacoustical model and dynamic noise allocation.
模拟分析滤波器的实现误差以及各子带间的增益、相位失配误差的存在都将影响混合滤波器组（HFB）的完美重构效果。
The problems caused by analogy analysis filters realization error and gain phase error usually impact the reconstruction performance of the hybrid filter banks(HFB).
从理论上详细分析了基于滤波器组的窄带干扰抑制技术能够克服基于FFT频域均衡缺点的主要原因，并在此基础上提出了基于自适应子带合并的算法。
It is considered completely in theory why the NBI method based on filter Banks can overcome the disadvantages of FFT method, and the adaptive subband merging is presented.
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