计算机专业英语教案

1、精选优质文档倾情为你奉上精选优质文档倾情为你奉上专心专注专业专心专注专业精选优质文档倾情为你奉上专心专注专业教材名称：计算机专业英语主编： 来永春出版时间： 电子教案第 25 次课 学时 2 授课题目（章，节）Project Five Beautifying the Online Store PagePart A Theoretical LearningSkill One A Short Introduction to Multimedia授课类型（请打）理论课 研讨课 习题课 复习课 其他教学目的：1 In comprehension ability of the reader. 2.We

2、have marked specialized vocabulary key words in some paragraphs so that the reader can quickly grasp the main idea of the sentences and paragraphs.教学方法、手段： 1. By the computer, projector and blackboard-writing 2. By the student-centered learning, using Classroom Teaching Method, Communicative Teachin

3、g Method, Task-based Teaching Method and Audio-visual Teaching Method教学重点、难点：1.Master the key words and phrases in the text.2.Can analyze the structure of the complex sentences in the text.3.Can translate the text into Chinese with the help of the reference materials.3.Can describe A Short Introduti

4、on to Multimedia教学内容及过程设计补充内容和时间分配教学设计 Step 1. Learning key words and phrases audio n.音频 animation n.动画 video n.视频 compression n.压缩 frame n.帧 algorithm n.算法 pixel n.像素 JPEG (Joint Photographic Experts Group) abbr.联合图像专家组 MPEG (Motion Picture Experts Group) abbr.运动图像专家组 rectangular adj. 矩形的 grid n. 网

5、格 Step 2. Introduction of training target 1 In articles and the comprehension ability of the reader. 2.We have marked specialized vocabulary key words in some paragraphs so that the reader can quickly grasp the main idea of the sentences and paragraphs. Step 3. Leading in a short introduction to Mul

6、timedia In fact, multimedia is just two media: sound and pictures. It is made from a mix of hardware and software, or machine and ideas. It presents information, shares ideas and evokes emotions. It enables you to see, hear, and understand the thoughts of others. Step 4. Analyzing the structure of t

7、he complex sentences 1. Multimedia is a kind of computer technology that combines text, audio, static graphic images, animations, and full-motion video. 2. Audio refers to sound or to things which can be heard. Usually, the human ear can hear a range of frequencies between around 20Hz20KHz. 3. A maj

8、or goal of the MPEG-2 video standard is to define the format of the video data which is to be transmitted. Step 5. Memorizing and mastering the following key sentences in the text. 1. You can make it do what you want it to do. Thats the strength of multimedia. 2. Computer software can easily process

9、 digitized sound. Virtually, all professional sounds of recording and editing are digital nowadays. 3. JPEG image-compression standard and file format define a set of compression methods for high-quality images, such as photographs, single video frames or scanned pictures. 4. JPEG does not work very

10、 well when compressing text, line art or vector graphics. 5. MPEG standards are the main algorithms used to compress video and have become international standard since 1993. 6. If the compression techniques are used in MPEG-2, then they are to a large extent based on some knowledge. 7. The knowledge

11、 is that we have about how the human eye and the visual centers in the brain recognize images. 8. So far, the capabilities of the human eye to recognize images have been described. 9. There are two major color spaces types used in digital video: RGB and YUV. RGB is commonly used in computer environm

12、ents, while YUV is related more to the television world. 10. The simplest representation of digital video is a sequence of frames, each consisting of a rectangular grid of picture elements or pixels. 11. Each pixel can be a single bit to represent either black or white, using 8 bits per pixel to represent 256 gray levels. 12. For color video, good systems use 8 bits for each of the RGB colors. 24 bits per pixel limits the number of colors to about 16 million Step 6.Summarizing in class.