Give two uses of each 15 what is a pixel explain how

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Unformatted text preview: d are NTSC, PAL and SECAM. 20. Video camera, video monitor, video board, and video editor are some of the commonly used hardware devices for processing video mediae 21. Some of the desirable features of a multimedia computer system with video facility are video clips and recording and playback capabilities. 22. Some of the key areas that have benefited a lot with the advent of multimedia are education, entertainment, marketing, groupware, and science and engineering. 23. Data compression techniques are used to reduce the volume of multimedia data in such a way that the original data can be reproduced with the desired quality level whenever required. 24. The process of reducing the volume of data by applying a compression technique is called compression and the resulting data is called compressed data. The reverse process of reproducing the original data from compressed data is called decompression and the resulting data is called decompressed data. 25. Data compression techniques may be lossless or lossy, symmetrical or asymmetrical, and software 01 hardware implemented. 26. The commonly used lossless compression techniques are run-length coding and variable-length coding. 27. The commonly used lossy compression techniques are predictive encoding and transform encoding. 28. Some standard multimedia compression techniques are • JPEG (Joint Photographic Experts Group) for still images • MPEG (Motion Pictures Experts Group) video for digital video • MPEG audio for digital audio 29. Multimedia synchronization deals with mechanisms to ensure the desired temporal ordering among a set c multimedia objects in a multimedia presentation. Questions 1. What is multimedia? Explain with the help of some examples. 2. Tell which ones of the following are unimedia and which ones are multimedia devices (give justification f< your answers): (a) TV system (d) A book having only text (no diagrams) (b) Stereo system (e) A book having both text and diagrams (c) Telephone system (f) A modern personal co...
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