四川邮电职业技术学院教案专用纸 Teaching plan English for Lecturer Wangwei-Zhuang Course Unit One Telecommunications Number Teaching Grade Lecturing Mod Content The Principle of PCM Class Hours2 Periods 1. to know the three basic of PCM: Sampling Quantizin Teaching 2. to understand that PCM is the heart of technology in communications in Objectives today's digita/ world. 3. to master the technical terms: PCM sampling quantizing encoding pulse stream Focal 1. Focal Points:. The three processes of PCM Difficult 2. Difficult Points: the conversion of the analogue signals into binary form; The technical P oInts terms in the text eaching Methods Ways of lecturing, multimedia demonstration and speech interacting are applied to achieve the most understanding of the text intended Applied Discussion: What is the heart of technology in commun ications in today's digital world? (Topic) Exercises Exercises:共2道题 and Assignments 1. to collect the materials related to PCM 2. to apply the principle of PCM to the practice 1. Zhang Daozhen, ed Practical English Grammar (the 3rd Revision). Shanghai: the Commercial press. 1992 2. Shanghai Translation Publishing House, edu. New English-Chinese Bibliography Dictionary. Shanghai: Shanghai Translation Publishing House, 1988 3. Posts and Telecom Press, edu. English-Chinese Telecommunications Technology Dictionary. Bei jing: Posts and Telecom Press, 1997 4. Zhang Xiaohua and Shi Fangwen, ed English for Telecommunications(the 4 Page 1 of Teaching Plan of English for Telecommunications Unit One
四川邮电职业技术学院教案专用纸 Page 1 of 12 Teaching Plan of English for Telecommunications Unit One Teaching Plan Lecturer Wangwei-zhuang Course English for Telecommunications Lesson Number Unit One Time Grade Teaching Mode Lecturing Content The Principle of PCM Class Hours 2 Periods Teaching Objectives 1． to know the three basic processes of PCM: Sampling Quantizing Encoding 2． to understand that PCM is the heart of technology in communications in today’s digital world. 3． to master the technical terms: PCM sampling quantizing encoding pulse stream… Focal & Difficult Points 1． Focal Points：. The three processes of PCM 2． Difficult Points：the conversion of the analogue signals into binary form; The technical terms in the text. Teaching Methods Applied Ways of lecturing, multimedia demonstration and speech interacting are applied to achieve the most understanding of the text intended. Discussion, Exercises and Assignments Discussion：What is the heart of technology in communications in today’s digital world？（Topic） Exercises：共 2 道题 Assignments： 1. to collect the materials related to PCM. 2. to apply the principle of PCM to the practice Bibliography 1. Zhang Daozhen,ed.Practical English Grammar (the 3rd Revision).Shanghai: the Commercial Press,1992 2. Shanghai Translation Publishing House, edu. New English-Chinese Dictionary. Shanghai: Shanghai Translation Publishing House,1988. 3. Posts and Telecom Press, edu. English-Chinese Telecommunications Technology Dictionary. Beijing: Posts and Telecom Press,1997 4. Zhang Xiaohua and Shi Fangwen,ed.English for Telecommunications (the 4th
四川邮电职业技术学院教案专用纸 Version). Beijing: Beijing of posts and telecommunicat Press. 2004 5. Xu Xiulan. English for Computers and Telecommunications (the 3re Revision). Beijing: Beijing University of Posts and Telecommunications Press. 2004 Teaching Plan of English for Telecommuni Unit One
四川邮电职业技术学院教案专用纸 Page 2 of 12 Teaching Plan of English for Telecommunications Unit One Version).Beijing: Beijing University of Posts and Telecommunications Press,2004 5. Xu Xiulan.English for Computers and Telecommunications (the 3rd Revision) .Beijing: Beijing University of Posts and Telecommunications Press,2004
四川邮电职业技术学院教案专用纸 Teaching Content Contents Time Apparatuses I. Brief-Introduction to English on Telecommunications 3 From this period on, we are g to learn English on Telecommunications, which is one of the English for special projector, purposes. Learning this course, we will enlarge our vocabulary in the field of telecommunications and information; get familiar with 2 mins loud the terms in it: get to know the characteristics of writing style of telecommunications English and master the translation skills of it: thus greatly improve our professional qualities and communicative competency in this globalized world in the anguage teaching II. Pre-reading Activities system, Introduction to Pulse Code Modulation(PCM) blackboard Ask the ss the following two questions related to the theme of the text recorder What is the heart of technology in communications in today's digital world? DVD, Possible answers: PCM, which is short for pulse code modulation (to be discussed in depth later) is the heart of technology in mmunications in today's digital world. It is a process in which analog signals are converted to digital form the analog signal is represented by a series of pulses and non -pulses(1 or o respectively ). At this stage to fully understand we can refer back to the notes on signals Why Pcm? Possible answers: The stream of pulses and non-pulse streams of 1s and 0s are not easily affected by interference and noise. Even in the presence of noise, the presence or absence of a pulse can be easily determined. Since PCm is digital, a more general reason would be that digital signals are easy to process by cheap standard techniques. This makes it easier to implement complicated communication systems such as telephone networks (covered later in this course) The practica l implementation of PCM makes use of other processes. The processes are carried out in the order in which they appear below Filtering Sampling Page 3 of 12 Teaching Plan of English for Telecommunications Unit One
四川邮电职业技术学院教案专用纸 Page 3 of 12 Teaching Plan of English for Telecommunications Unit One Teaching Content Contents Time Teaching Apparatuses I. Brief-Introduction to English on Telecommunications From this period on, we are going to learn English on Telecommunications, which is one of the English for special purposes. Learning this course, we will enlarge our vocabulary in the field of telecommunications and information; get familiar with the terms in it; get to know the characteristics of writing style of telecommunications English and master the translation skills of it; thus greatly improve our professional qualities and communicative competency in this globalized world in the information age. II. Pre-reading Activities Introduction to Pulse Code Modulation (PCM) Ask the Ss the following two questions related to the theme of the text: What is the heart of technology in communications in today’s digital world？ Possible answers: PCM, which is short for Pulse code modulation (to be discussed in depth later) is the heart of technology in communications in today’s digital world. It is a process in which analog signals are converted to digital form. The analog signal is represented by a series of pulses and non-pulses (1 or 0 respectively). At this stage to fully understand we can refer back to the notes on signals. Why PCM? Possible answers: The stream of pulses and non-pulse streams of 1’s and 0’s are not easily affected by interference and noise. Even in the presence of noise, the presence or absence of a pulse can be easily determined. Since PCM is digital, a more general reason would be that digital signals are easy to process by cheap standard techniques. This makes it easier to implement complicated communication systems such as telephone networks (covered later in this course). The practical implementation of PCM makes use of other processes. The processes are carried out in the order in which they appear below: • Filtering • Sampling 3 mins 2 mins 60 mins computer， projector， loud speaker， audio-visual language teaching system， blackboard， recorder， DVD， radio， hanging chart， model
四川邮电职业技术学院教案专用纸 Quantizing Encoding III While-reading Activities i. New Words And phrases principle[' pr i nsi pl]n,原理 be de pendent on做赣,取决于 sample[ s aem p1]vt采样样值 quantize[ k won aiz]v量化分层 mIns code[koud]v编码n码 scheme[ski:m]n.方案设排啡 describe[dis" krai b]vt述描述 description皺錋述描述 ampHtude[ aem p Ii tj u:d]n幅,幅度 binary ['ba i nar i]a二进的 mIns minimum[ m I n I mam]n.最小值最小量 theoretical[ eiare ti kal]a理论上的 I mins repetition[repi' t ifan]n.复夏 reexamination再考 maximun[ maeksimam]n.最大值 reduce[ri:'dju:s]v.少缩小 terchange[ i n tate i nd]v.互换轶换 method ['m eead]n.菇發 overcome[ o va kam]v.克服打败征服报 environment[in' v a bremen t]n.环境周围觏 Lightning ['l a i t n il6]n.电光闪电雷电 strike[ straik]n.击戴打 spark[spck]ⅵ发花批 ignition[ig" n i n]n.献火犍置 signaltonoise ratio僧颚 satellte ' sati la i tnpE terrestrial[ti' rest rie1]a地的地面的大地 by comparison比来下 parameter[ pa' raem i ta]n.参澈数 attenuation浏减表耗 inherent[in' h ie ran t]a.固有的 Teaching Plan of English for Telecommunications Unit One
四川邮电职业技术学院教案专用纸 Page 4 of 12 Teaching Plan of English for Telecommunications Unit One • Quantizing • Encoding III. While-reading Activities i. New Words And Phrases p ri nc i p le ［ ' ｐ ｒ ｉ ｎ ｓ ｉ ｐ ｌ ］ n . 原 理 b e de pe n d e n t o n 依 赖 ， 取 决 于 sample ［'ｓæｍｐｌ］vt.采样；样值 quantize ［'ｋｗɔｎｔａｉｚ］v.量化，分层 code ［ｋｏｕｄ］v.编码；n.码 scheme ［ｓｋｉ: ｍ］n.方案，设计，安排 describe ［ｄｉｓ'ｋｒａｉｂ］vt.叙述，描述 description 叙述，描述 amplitude ［'æｍｐｌｉｔｊｕ:ｄ］n.幅，幅度 binary ［'ｂａｉｎəｒｉ］a.二进制的 minimum ［'ｍｉｎｉｍəｍ］n. 最小值，最小量 theoretical ［θｉə'ｒｅｔｉｋəｌ］a. 理论上的i repetition ［ｒｅｐｉ'ｔｉʃəｎ］n. 重复，反复 reexamination 再审查，重考 maximum［'mæksiməｍ］n. 最大值 reduce ［ｒｉ:'ｄｊｕ:ｓ］v. 减少，缩小 interchange［ｉｎｔə'ʧｅｉｎʤ］v. 互换，转换 method［'ｍｅθəｄ］n. 方式，方法，手段 overcome ［ｏｕｖə'ｋʌｍ］v. 克服,打败,征服 environment［ｉｎ'ｖａｉəｒəｍəｎｔ］n. 环境,周围情况 lightning ［'ｌａｉｔｎｉɧ］n. 电光，闪电，雷电 strike ［ｓｔｒａｉｋ］n. 击，敲，打 spark ［ｓｐα:ｋ］vi. 发火花，打火，闪光 ignition ［ｉｇ'ｎｉʃəｎ］n. 点火，点火装置 signaltonoise ratio 信号噪声比 satellite ［'ｓæｔｉｌａｉｔ］n.卫星 terrestrial［ｔｉ'ｒｅｓｔｒｉəｌ］a.地球的,地面的,大地的 by comparison 比较起来，相对之下 parameter［ｐə'ｒæｍｉｔə］n. 参数，系数 attenuationn. 衰减，衰耗 inherent［ｉｎ'ｈｉəｒəｎｔ］a. 固有的，内在的 2mins 4 mins 1 mins
四川邮电职业技术学院教案专用纸 assume[ssju:m]v假髋定 decoder解器 codec编译码器 interleave[int"li:]t.彌插殲播接 appropriate[s' proup r i t]a.适当的合适的 ik]a唯的猫 reoccur再先生再姓生 ii. Passage-reading Activities The Principle of PCM(1) PcM原理 PCM is dependent on(22_three separate operations, sampling, quantizing, and coding(2 ). Many different schemes for performing 2)these three functions have evolved during recent years, and we shall describe the main ones PCM的构成依赖于三个环节即采样、量化和编码.近年来人们对这 三个环节的实现提出了许多不同的方案我们将对其中一些主要的方案进 行讨论 (2). be dependent on依靠,依赖,取决于 (2). performing是 perform的动名词动名词虽为名词,但仍 保留着动词的某些特征,例如它仍可带有动词宾语本句中的 these three functions就是 performing的宾语 本课中这类例子很多,例如第四段中的最后一句中 Consequently there is an inherent advantage for overcoming noisy environments by choosing digital transmission. 句中的 overcomIng和 choosing都是动名词且带有自己的动词宾语. 另有理论认为PCM分为四过程,如下: The practical implementation of PCM makes use of other processes. The processes are carried out in the order in which they appear below Fil tering Quantizing The filtering stage removes frequencies above the highest signal frequency. These frequencies if not removed, may cause problems when the signal is going through the stage of sampling. Sampling of a waveform means determining instantaneous ampli tudes of a signal at fixed intervals. You may have a problem in understanding what this sentence means, but if you take time to look at Figure 7 on the following Slide you should be able to understand. Page 5 of 12 Teaching Plan of English for Telecommunications Unit One
四川邮电职业技术学院教案专用纸 Page 5 of 12 Teaching Plan of English for Telecommunications Unit One assume ［ə'ｓｊｕ:ｍ］v. 假设，假定 decoder 解(译)码器 codec 编译码器 interleave ［ｉｎｔ'ｌｉ:ｖ］vt. 交插，交错，插接 appropriate ［ə'ｐｒｏｕｐｒｉｔ］a. 适当的，合适的 unique ［ｊｕ:'ｎｉｋ］a. 唯一的，独特的 reoccur 再发生，再次发生 ii. Passage-reading Activities The Principle of PCM(1) PCM 原理 PCM is dependent on (2 ) three separate operations, sampling, quantizing, and coding (2’). Many different schemes for performing (2) these three functions have evolved during recent years, and we shall describe the main ones. PCM 的构成依赖于三个环节,即采样、量化和编码. 近年来,人们对这 三个环节的实现提出了许多不同的方案,我们将对其中一些主要的方案进 行讨论. ◼ （2）. be dependent on 依靠，依赖，取决于. ◼ （2’）. performing 是 perform 的动名词.动名词虽为名词，但 仍 保留着动词的某些特征，例如它仍可带有动词宾语.本句中的 these three functions 就是 performing 的宾语. 本课中这类例子很多，例如第四段中的最后一句中： Consequently there is an inherent advantage for overcoming noisy environments by choosing digital transmission. 句中的 overcoming 和 choosing 都是动名词且带有自己的动词宾语. ◼ 另有理论认为ＰＣＭ分为四过程，如下： ◼ The practical implementation of PCM makes use of other processes. The processes are carried out in the order in which they appear below: Filtering Sampling Quantizing Encoding The filtering stage removes frequencies above the highest signal frequency. These frequencies if not removed, may cause problems when the signal is going through the stage of sampling. Sampling of a waveform means determining instantaneous amplitudes of a signal at fixed intervals. You may have a problem in understanding what this sentence means, but if you take time to look at Figure 7 on the following Slide, you should be able to understand