This unit introduced the learner to the peripheral device that can be connected to the computer. It dealt on the conversions of analog to digital data. the different wave forms representing conversions of the analog to digital data were also introduced. Also the multimedia data and what needs to be done for it to be transmitted across networks. The peripherals include computer mouse, keyboard, image scanners, tape drives, microphones, loudspeakers, webcams, and digital cameras.
The following section will test the learners understanding of this unit
Answer the following questions
- Explain digitization of an analog signal?
- What is sampling in digitization?
- Explain the term animation
- Grading Scheme
The marks will be awarded as shown below
Question Sub-question marks awarded 1 Explanation award 2 mark. extars like examples and diagrams award 2 extra marks; maximum 2 giving total 6 6 2 Definition award 2 marks 2 3 Explanation only 2 marks. 2 Total 10
1. Digitalization of an analog signal involves two operations:
1) Sampling, and
Analog signals consist of continuous values for both axes. An analog signal exists throughout a continuous interval of time and/or takes on a continuous range of values. A sinusoidal signal (also called a pure tone in acoustics) has both of these properties.
2.Sampling is the process of recording an analog signal at regular discrete moments of time.
3.Computer animation lies somewhere between the motionless world of still images and the real-time world of video images.