計(jì)算機(jī)專業(yè)英語教案

1、教材名稱：計(jì)算機(jī)專業(yè)英語主編： 來永春出版時(shí)間： 電子教案第 25 次課 學(xué)時(shí) 2 授課題目（章，節(jié)）Project Five Beautifying the Online Store PagePart A Theoretical LearningSkill One A Short Introduction to Multimedia授課類型（請打）理論課 研討課 習(xí)題課 復(fù)習(xí)課 其他教學(xué)目的：1 In this part, our target is to improve the speed of reading professional articles and the comprehen

2、sion 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.教學(xué)方法、手段： 1. By the computer, projector and blackboard-writing 2. By the student-centered learning, using Classroom Teach

3、ing Method, Communicative Teaching Method, Task-based Teaching Method and Audio-visual Teaching Method教學(xué)重點(diǎn)、難點(diǎn)：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

4、.3.Can describe A Short Introdution to Multimedia教學(xué)內(nèi)容及過程設(shè)計(jì)補(bǔ)充內(nèi)容和時(shí)間分配教學(xué)設(shè)計(jì) Step 1. Learning key words and phrases audio n.音頻 animation n.動畫 video n.視頻 compression n.壓縮 frame n.幀 algorithm n.算法 pixel n.像素 JPEG (Joint Photographic Experts Group) abbr.聯(lián)合圖像專家組 MPEG (Motion Picture Experts Group) abbr.運(yùn)動圖像專

5、家組 rectangular adj. 矩形的 grid n. 網(wǎng)格 Step 2. Introduction of training target 1 In this part, our target is to improve the speed of reading professional articles and the comprehension ability of the reader. 2.We have marked specialized vocabulary key words in some paragraphs so that the reader can quic

6、kly grasp the main idea of the sentences and paragraphs. Step 3. Leading in a short introduction to Multimedia 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. I

7、t enables you to see, hear, and understand the thoughts of others. Step 4. Analyzing the structure of the 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

8、can be heard. Usually, the human ear can hear a range of frequencies between around 20Hz20KHz. 3. A major 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

9、it do what you want it to do. Thats the strength of multimedia. 2. Computer software can easily process 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-q

10、uality images, such as photographs, single video frames or scanned pictures. 4. JPEG does not work very 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 t

11、echniques are used in MPEG-2, then they are to a large extent based on some knowledge. 7. The knowledge 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

12、 major color spaces types used in digital video: RGB and YUV. RGB is commonly used in computer environments, 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 c