The modulator quantizes the input signal and move the low frequency inband quantization noise to high frequency.

调制器完成对输入信号的量化并对量化噪声进行整形，将有用信号频带内的低频噪声搬移至高频段。

According to trade characteristic, the writer quantizes the evaluation system about stock management and offers the measures to examine and supervise it.

并根据行业特点，量化库存管理评估体系，而且提出考核监督的实施办法。