这本教材介绍了数字信号处理的研究，采用自上而下的结构来激励读者，用图形的方法来解决信号处理的数学问题，并广泛使用MATLAB。

This textbook provides an introduction to the study of digital signal processing, employing a top-to-bottom structure to motivate the reader, a graphical approach to the solution of the signal processing mathematics, and extensive use of MATLAB.

与传统的教学方法不同，这本书提供了一种自上而下的方法，首先向学生介绍数字滤波器的设计，提出有关所需数学工具的问题。

In contrast to the conventional teaching approach, the book offers a top-down approach which first introduces students to digital filter design, provoking questions about the mathematical tools required.

后面的章节将回答这些问题，介绍离散域信号、傅立叶分析、时域滤波器和Z变换。

The following chapters provide answers to these questions, introducing signals in the discrete domain, Fourier analysis, filters in the time domain and the Z-transform.

作者以概念的方式用图形介绍数学，以说明所涉及方程的物理意义。

The author introduces the mathematics in a conceptual manner with figures to illustrate the physical meaning of the equations involved.

第六章以这些概念为基础讨论了高级滤波器设计，第七章讨论了实际的实现问题。

Chapter six builds on these concepts and discusses advanced filter design, and chapter seven discusses matters of practical implementation.

本书在每一章都用实例介绍了相应的MATLAB函数和程序，最后一章介绍了实际的MATLAB实时滤波器。

This book introduces the corresponding MATLAB functions and programs in every chapter with examples, and the final chapter introduces the actual real-time filter from MATLAB.

本书主要针对电气与电子工程专业的本科生，使读者能够使用MATLAB实现数字滤波器。

Aimed primarily at undergraduate students in electrical and electronic engineering, this book enables the reader to implement a digital filter using MATLAB.

从实际角度出发，广泛使用插图来传授数字信号处理的概念知识。

Deliver the conceptual knowledge of digital signal processing with extensive use of the illustrations from practical viewpoint.

此外，数字信号处理是从数字域而不是从连续域开始的。

Also, the digital signal processing is initiated from the digital not from the continuous domain.

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