IT: Information
IT: Information

This free course is available to start right now. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation.

Free course

IT: Information

4.2 Sound and light input

Figure 5 shows a model of a camcorder at a lower level of abstraction than Figure 4, concentrating on the input of light and sound.

The input of light and sound to a camcorder
Figure 5 The input of light and sound to a camcorder

Activity 9

Although Figure 5 shows more details of the light and sound input than Figure 4, some other aspects of the camcorder are shown in less detail than in Figure 4. What things have gone, and can you suggest why I haven't shown them?

Discussion

In Figure 5 I have not shown the list of processes – receives, sends, stores/retrieves, manipulates – nor have I shown the oval labelled 'user' with the two input/output arrows. I have omitted these things because I am concerned specifically with the light and sound inputs, and the other features would be a distraction for the moment. This is an important feature of abstraction: selecting what is important.

I shall now go on to discuss the components shown in Figure 5 in more detail.

T175_8

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to university level study, find out more about the types of qualifications we offer, including our entry level Access courses and Certificates.

Not ready for University study then browse over 900 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus