Effective Presentation CIT Core Module Chapter 4

Questions 1-4 List 4 kinds of elements which a multimedia presentation usually contains? T____(1)_____ G____(2)_____ S____(3)_____ V____(4)_____

Questions 5-6 Besides using compression, how can you reduce the sizes of the following files without losing their important information? (5) bitmapped graphic files _________________________ (6) video files _________________________

Questions 7 A ____(7)_____ consists of several pictures stored in the same file and shown in a rapid sequence to give the illusion of motion picture.

Questions 8-9 File Format If resolution is 50 dpi, what is the size of the screen (w * h)? ____(8)____ UNIT : (9) File size Bit rate

Questions 10 A uncompressed digital picture of size 320 x 240 pixels having 200 dpi resolution and colours in a pixel. What is the estimated file size in K bytes? ___(10)____

Answers (1) Text 文本 (2) Graphics 圖像 (3) Sound 聲效 (4) Video 視像 / 視訊 (5) Reduce number of pixels / reduce resolution / reduce colour used in a pixel (6) Reduce the frame rate (fps) / reduce resolution (7)Animated GIF 圖形互換格式動晝檔 (8) 4.16 ” x 3.2 ” (9) fps (10) 320 x 240 x 2 bytes = 150 KB