MULTIMEDIACOMPREHENSIVE EXAM

Instruction: Answer the following questions as closely as these were discussed in the class.

1. How is sound produced? Ans. Sound waves are produced by vibration that causes the molecules of a medium to form alternating high- and low-pressure fronts. These waves can travel through solids, liquids and sufficiently dense gases

2. The number of wave cycles per second that sound produces is known as frequency.What is the unit used in measuring these wave cycles? Ans. Hertz (Hz)

3. Discuss what is multimedia and give examples of multimedia applications.Ans. Multimedia is the field concerned with the computer-controlled integration of text, graphics, drawings, still and moving images (Video), animation, audio, and any other media where every type of information can be represented, stored, transmitted and processed digitally.

4. Give the 6 multimedia elements.Ans. text, animation, still images, audio, video and interactive platforms

5. Multimedia may be broadly divided into linear and non-linear categories. Differentiate the two. Ans. Linear active content progresses often without any navigational control for the viewer such as a cinema presentation. Non-linear uses interactivity to control progress as with a video game or self-paced computer based training.

6. A Multimedia system has four (4) basic characteristics. Mention them.Ans. Non-linearity, Interactivity, Integrity, Digital representation

7. There are key issues multimedia systems need to deal with. Give at least two (2).Ans. How to represent and store temporal information.How to strictly maintain the temporal relationships on play back/retrieval

8. There are two different types of computer graphic images: vector and bitmap. Differentiate them.Ans. Vector images are not based on pixel patterns, but instead use mathematical formulas to draw lines and curves that can be combined to create an image from geometric objects such as circles and polygons. While Bitmap (or raster) images are stored as a series of tiny dots called pixels.

9. As the frequency goes up or increases, you hear the pitch getting higher. When the frequency goes down, you hear sound going down in pitch. What is the range of frequencies that human beings can perceive? Ans. 20 to 20,000 Hz

10. Why is digital recording better than analog recording?