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