英国《数字信号处理》之课程教学分析
"Digital Signal Processing" electronic information is an important professional basic course. It is a multi-course interconnected bridge and link, realized from theory to practice mutual transition for students theoretical analysis and comprehensive ability has a very important role. With the ever-changing computer technology, electronic technology and the rapid development of digital signal processing One new theories and new technologies emerging, it has become increasingly prominent position and role. Our teaching is still widely used chalk and talk teaching philosophy and methods of transmission, with world-class research universities between teaching philosophy and methods, there is a big gap. How to reform, it has the characteristics of high-tech digital age is a topic worth exploring.
《数字信号处理》是电子信息类专业的一门重要专业基础课。它是多门课程相互连接的桥梁和纽带，实现了从理论到实践的相互过渡，对于培养学生理论分析和综合应用能力有非常重要的作用。随着电子技术及计算机技术日新月异的飞速发展，数字信一号处理的新理论和新技术层出不穷，它的地位和作用越来越突出。我们的课程教学中仍然普遍采用的满堂灌输的教学理念和方法，与世界一流大学的研究型教学理念和方法之间，存在较大的差距。如何通过教学改革，让它具有高科技数字时代的特色是一个值得探索的课题。
A multimedia teaching 1 多媒体教学
As the "Digital Signal Processing" course more abstract theories, concepts, formulas are more traditional teaching methods of teachers on the podium taught courses, which focuses on the derivation of algorithms and theory; students in the classroom lectures and learning, learning activities largely rely on detection test. Multimedia teaching to improve the traditional teaching model to illustrations, audio and video with the whole, abstract to concrete ways to optimize the entire process of teaching and practice.
由于《数字信号处理》课程理论比较抽象，概念、公式较多，传统的教学手段和方法是教师在讲台上讲授课程的内容，主要讨论算法和理论的推导;学生在教室里听课和学习，学习活动很大程度上需要依靠检测考试。多媒体教学改进了传统教学模式，以图文并茂、声像具全、化抽象为具体的方式，优化整个教学过程和实践过程。
In order to enhance the interactivity of teaching, classroom teachers in the classroom while using MATLAB graphical presentation, while on the blackboard to explain the derivation of the relevant formulas and to encourage students to focus on classroom learning to understand the concepts and ideas on problem solving. In an interview with the students theoretical knowledge, while boring, you can see the corresponding validation demonstrates knowledge points, making teaching more intuitive, vivid and compact. Usually difficult to complete in writing jobs for students using MATLAB software to complete and deepen the understanding of the knowledge and improve interest in learning.
为了增强教学的互动性，任课教师在课堂上一边使用MATLAB图形演示，一边在黑板上讲解推导相关公式，并鼓励学生把课堂学习的重点放在理解概念和解决问题的思路上。使学生在接受枯燥理论知识的同时，可以看到相应知识点的验证演示，从而使课堂教学更加直观、生动和紧凑。平时以书面形式难以完成的essay，让学生利用MATLAB软件完成，加深对所学知识的理解，提高学习兴趣。
In order to ensure hours and good teaching, teaching to be prioritized, appropriate levels of detail. Such as the FFT algorithm to explain, because the base 2-DIT-FFT with the base 2-DIF-FFT algorithm has a symmetrical relationship, so you can explain in detail the former algorithm, and a brief description of the control of the latter algorithm, no further details formulas are derived; another example IIR filter design content, as Butterworth low-pass filter and a few other ways similar principles in the design of the filter, so you can Butterworth low-pass filter, for example, detailed derivation and explain the design process , and for a brief description of several other filters can be given conclusive design process can be. This can save a lot of teaching hours, and can achieve focused, the effect of replication, help students to grasp and understand the content.
Teachers design classroom-based teaching content, the general level students can understand and accept. Students' independent learning course content should not only reflect the curriculum requirements, taking into account the different levels and basis of student learning, the students according to their learning speed and comprehension, grasp the ability to choose learning content, learning sequence. Use of multimedia teaching, teachers from the traditional lecture becomes ready for students to design resources and provide personalized help. Meanwhile, the development of learning outcomes, learning summary, learning reflection, online Q & A, etc. Evaluation and Oversight Policy, to stimulate student interest in learning, to achieve teaching objectives.
2 Experiment
In the past, teaching mode, teaching experiment only requires students to understand the knowledge of the application. In recent years, the British foreign advanced signal processing to enhance the teaching mode requires experimental teaching to new heights, which uses experimental demonstration help students understand important concepts of the course to enable students to understand the knowledge of the application, in experiments to guide students from passive learning into active learning. To this end, teaching also need to change accordingly: the use of MATLAB-based presentations, a substantial increase in digital signal processing application, so that experimental teaching students practical ability to truly become an important part.
The characteristics of the course and for the purpose of teaching, digital signal processing experiment teaching content into digital signal processing theory based experiments, digital filter design experiments and implementation of digital signal processing and application. Compare the teaching content and methods of abstract theory into simulation software, such as "Digital Signal Processing" in the time domain and frequency domain sampling theorem, discrete Fourier transform, spectral analysis, fast Fourier transform, filter design and other content, student available through online virtual labs, verify these theories and methods of signal processing, deepen understanding and mastery of knowledge.
Practice requires students to report on their progress with the prep lab, and through spot checks asking questions to understand students prep level. Take this approach also improves the utilization of laboratory equipment and laboratory classroom efficiency. Then the experimental results of the assessment to get the experimental scene, all aspects of the experimental process is satisfied person assessment elements, taken live scoring of the way, so the experimental results basically reflect the true level of students to experiment, to ensure maximum experimental achievement of the objective and fair. Teachers prepared before the experiment, carefully designed experiment content, using heuristic and discuss formula to carry out experimental teaching, students focus on rigorous scientific attitude, team spirit and mutual cooperation courage to open up innovation. Through practice, students reflect the good, both students integrate theory with practice, and digital signal processing capability, but also improve the practical ability and innovative ability.
Three bilingual teaching
With the rapid development of signal processing technology, the international "Digital Signal Processing" course content, teaching methods and teaching methods have changed dramatically. Most Chinese English textbooks do not reflect these changes. In many aspects of teaching materials, compared with foreign countries there is a big gap. In order to make the teaching content with the international advanced level, the course introduces English textbooks, bilingual teaching.
Bilingual education must consider the student's language skills, the use of appropriate teaching mode. In the textbook selection, we use an English textbook, an electronic version of the Chinese teaching materials and a Chinese reference book. English teaching is the main source of teaching content, the choices are introduced internationally renowned Tsinghua University Press, original materials-AV. Oppenheim (AV Oppenheim) waiting for the "Discrete-Time Signal Processing)). This book is in Oppenheim digital signal processing of a masterpiece, its clear concept elaborated rigorous, content arrangement is reasonable, abundant examples and exercises, is a good foundation materials. The material also has a corresponding Chinese translation of the English version two complement each other, so that students are better able to experience its essence and put into practice. Electronic version of the Chinese translation of materials for teaching English version, the choices are Xi'an Jiaotong University Press published "when asked discrete signal processing (Chinese Edition 2 'version)." Chinese reference books in content coverage, beyond the course content, selected by Qinghua University Press published "MATLAB in digital signal processing applications." The book works through concrete examples of the application of MATLAB tools and basic knowledge of digital signal processing organically combine to give the user a great help bring learning, each chapter is given highly appropriate, practical exercises, user learning and mastery of knowledge.
Lecture course in English Opening (overview of the contents of this lecture), and then for the important specialized vocabulary to explain; mainly divided into several modules, in Chinese speaking supplemented with English terminology, and finally with Chinese summary. Right below the middle of difficulty English title assignments and English exams in English answer, difficult answer is in Chinese.
But part of teaching students English textbooks reflect not read words, low efficiency; while some students would reflect digital signal processing difficult science, foreign language teaching is even harder. Classroom teachers for students that after a careful analysis of the problem: First, students lack self-confidence, fear teaching courses in English is difficult to understand; Second, students do not learn the proper methods and techniques. For this reason, classroom teachers encourage students to take active measures to build confidence while learning methods to guide and help,http://www.ukthesis.org/jyx/and has repeatedly stressed bilingual education is to train students to learn English effective means of expertise, so that students truly ideological emphasis on bilingual education. Through these efforts, most students now accepting original English textbook.
Practice has proved that only by adopting appropriate bilingual teaching model, in order to ensure better learning outcomes. Students a better understanding of both the professional content of the curriculum, but also improves the ability to read English literature, while overcoming the English language for academic exchanges fear, and gradually improve the English language proficiency.
4 Conclusion
"Digital Signal Processing" course teaching and research practice shows: The course to break the traditional way of purely theoretical lectures, simulation technology and multimedia tools to deepen students 'understanding of theoretical knowledge and practical application of perceptual knowledge, stimulate students' creative thinking and a strong desire to practice. The use of advanced experimental teaching mode, the digital signal processing to enhance the basic concepts and definitions, basic principles of deep understanding and establish a vivid perceptual knowledge, so that theory and practice closely. Rather than just stay in the back of the formula, do exercises, test scores level. Bilingual education so that students of professional English skills improved significantly; familiar with the jargon, professional English spoken and written expression; understand how multimedia tools for international academic exchanges. "Digital Signal Processing" course teaching and research needs of the development of the times, is the implementation of quality education and innovative educational needs.
