ITEC2110:Spring2011:StudyGuide

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Contents

Section 5 Study Groups

  • Group 1: Bateman, Joshua; Brown, Scott V. ; Calsy, Sofia ; Chase, Alexcee M.
  • Group 2: Clark, Katherine M. ; Dean, Mylinda E. ; Dickey, Tyler T.  ; Hoggard, Megan E.
  • Group 3: Irby, Darwin L. ; McCool, Alexander N. ; McCravy, James T. ; McMicking, Christopher L.
  • Group 4: Meek, Caleb C. ;Mentore, Shenilla V. ; Morrison, Mary J. ; Oviedo, Adan E.
  • Group 5: Rice, Steven A. ; Riggs, Danny G. ; Robertson, Markus; Smith, Kristen N.
  • Group 6: Tabrizipour, Heidi S. ; Tripp, Angela L.  ; Winters, Leah J. ; Yu, Dong Ku

Section 6 Study Groups

  • Group 1: Bana, Nabeel Z. ; Brandon, William W. ; Brown, Carla D. ; Cheesman, John F.
  • Group 2: Deans, Nathan W. ; Donaldson, Derek S. ; Duliman, Darel
  • Group 3 Lanz, Kathryn N. ; Littleton, Brittany S. ; Mayfield, Kevin W. ; McKenzie, Laura P.
  • Group 4: Millwood, Savannah; Power, Taylor; Pracz, Paula O. ; Rahman, Habibunnabi A.
  • Group 5: Rahman, Sidra ; Schillinger, Sarah R. ; Sheriff, Miatta ; Smith, Angela L.
  • Group 6: Smith, Elizabeth; Walters, Jonathan C. ; Zimic, Nermina; Rodriguez, Lina

Section 12 Study Groups

  • Group 1: Chopson, Daniel J. ; Bernard, Imanuel E. ; Cable, Glenda A. ; Cantrell, Joshua B.
  • Group 2: Beck, Mary K. ; Duncan, William-Thomas N. ; Foulke, Alexis A.  ; Emelie Castillo
  • Group 3: James, Jessica ; Hurt, Jimmy L. ; Hutchison, Haley ; Johnson, T'Shura T.
  • Group 4: Markham, Ashley D. ; Palmer, Candace B. ; Pollard, Dalton J. ; Quintero, Nicolas
  • Group 5: Rennow, Babette M. ; Scruggs, Eric J. ; Stalvey, Allison M. ; Tran, Vu ;Zeitang, Judy

Ch1 Study Guide

  • Time-based media; static media
  • linear and non-linear structure of media
  • What is multimedia? What is digital multimedia?

Ch2 Study Guide

  • Reading: page 22 - 27, page 28; page 45 ;page 32; page 35;
  • Number converting: Decimal -> Binary; Binary -> Decimal; Hexadecimal - > Decimal (for example 0xAB = 10*16^1 + 11*16^0 = 171)
  • Make sure you know bit, Byte, KB, MB, GB and TB.
  • 10Kb means 10 kilo bit, 10KB means 10 kilo byte.
  • What is sampling? What is quantization?
  • What does sampling theory say about sampling rate? (in other words, how do we determine the appropriate sampling rate?)
  • what does undersampling mean?
  • What is aliasing ?
  • what is the result/effect of undersampling regarding to different media?
  • What is the result/effect when there is not enough quantization level?
  • Why compression is important when delivering media?
  • How text is represented digitally?
  • What is plain text & what is a plain text editor?
  • What is ASCII? What is Unicode?
  • Understand font and layout
  • how image is represented digitally?
  • The major differences between bitmapped image and vector graphics
  • Explain these terms: picture resolution; rendering; logical pixel; physical pixel
  • How animations and videos are represented digitally?


Ch8 Study Guide

  • Reading: p288-289; 294- 295- 296(Digitizing Sound); p298; p310 - 311 - 312-313-314 (compression; skip the math part); p321(Key Points)
  • What is the nature of sound?
  • Sound is usually represented in wave form. Understand frequency and amplitude.
  • What is the sampling rate for CD quality sound? Why?
  • How many quantization level it creates when 16 bits were used (not to remember the specific number, but how to calculate it.)
  • How to reduce quantization noise?
  • File format: wav, aiff, au, mp3. Which one(s) are compressed, which one(s) are not?
  • Click Blackboard/WebLinks/IpodFormat Answer the following questions:
A. Is WMA format compatible with ipod?
B. Is MP4 an audio format or video format? How about M4P?
  • Be able to calculate downloading time when file size and Internet speed are given.
  • Understand the three strategies to compress audio (Please read book chapter)
  • MP3 and AAC is based on which compression strategy?
  • What is MIDI? What is MIDI message? How midi represent music?

Ch3 Study Guide

  • Reading: Page 78(key points), page 83(key points), p97(key points)
  • List three typical vector format
  • Be able to add & subtract vectors (give examples)
  • Name the basic vector objects
  • Understand Bezier curve (cubic and quadratic; control points, end points, direction points, anchor points)
  • What are the affine transformations of vector objects
  • 3D rendering: what is view point; what are the shading algorithms? list two shading algorithms;
  • what is the so called wireframe
  • List the three basic 3D modeling approaches
  • List and understand the set operations with Constructive Solid Geometry
  • Be able to explain the following keywords: extrusion; lathing(p89); procedure modeling and fractal(p89-90); shading algorithm (p95); Ray tracing and Radiosity (p96)
  • Discuss question 4 on page 99 with your group

Ch4 Study Guide

  • reading: page 102 - 107, page 113, page 124 - 126, page 128 key points
  • Understand resolution for different device and related math problems(see slides), give one example
  • Click to watch Ch4 Resolution

Answer the following questions on group wiki page.

  • what is dpi? dpi is usually used to measure the__________________ of ________(device name).
  • How digital camera resolution is measured?
  • If a 3inch*5inch picture is scanned with 300dpi, the computer will store it using ______________ * ___________ pixels
  • When displayed on a 96 dpi monitor without scaling, the size is ________by ___________inch.
*Go to a Windows computer, click MyPictures, find a sample picture, what is the pixel resolution of the picture of your choice? ______ *_______
  • What is the device resolution of this picture? _____________.
  • The original size of the picture is______ by____ inches.
  • Understand under-sampling and over-sampling for pictures
  • Understand how RLE works (review examples on slides)
  • Understand how Huffman compression works, review and redo examples on slides
  • Understand image compression (lossy and lossless) (list all compression algorithms introduced in class, identify it's lossy or lossless. For example, RLE algorithm: Lossless
  • List images format and the compression algorithm. For example, GIF: lossess compression, use dictionary based algorithm(LZW)
  • How JPEG compression works (video is available at http://wiki.ggc.edu/mediawiki/index.php/ITEC2110:Xu:Videos )
  • What are the artifacts of JEPG compression?
  • List at least one characteristic of the following format: BMP, GIF, PNG, JPEG, SVG (visit Blackboard/ WebLinks for these file format)
  • Click here to watch Ch4 PPP, PGP, convolution mask
  • what is PPP and what is PGP (book content is hard to read, pay attention to the video.)
  • What is (are) the function(s) of convolution mask?
  • What is the criteria for a valid convolution mask. (Be able to identify a valid convolution masks.) Be able to identify blurry effect and sharpen effect convolution mask.
  • Be able to calculate the storage size of an uncompressed image. Two steps ->
  • step 1: find out how many pixels are in the picture;
  • steps 2: find out how many bits are used for each pixel (so called color depth or bit depth) ; For example, if a picture has 100 pixel, each pixel use 8 bits, then it takes 100 Byte to store all the pixels.
  • Understand the relationship of bit depth and the number of colors a picture could have. For example, 256 color requires ___bits per pixel.

Ch5 Study Guide

  • Reading: Page 156 - 170 RGB model and indexed color
  • Reading: page 170 - 174 CMYK, and general knowledge of HSL)
  • Reading: page 188 - 192 understand how to create consistent color
  • What is the nature of color
  • What are the primary additive colors?
  • Understand how RGB color system works.
  • To understand how RGB works, you have to know
  • How human perceive color and luminance
  • The basics of tri-stimulus theory
  • Then how RGB color system works
  • Which color system computer monitors use? How it works?
  • What is the so called indexed color? How index color works? (how many bits are usually used for the index, how many color could be generated by the bits of choice? What is the color look-up table?)
  • What is dithering? Why we need dithering?
  • What are the subtractive primary colors?
  • What is the complementary color of Red? What is the complementary color of G and B respectively?
  • How CMYK color system works?
  • How YUV color system works?(The basic idea)
  • color picker usually applies _____ color system.
  • Understand why color is not consistent on different devices
  • In order to provide consistent color, effort has been made (two approaches: color profile; sRGB. How these two approaches work?)
  • Have knowledge about the popular electronic devices and the color system it uses(look at the slides in this chapter, at the end).

Ch7 Study Guide

  • Explain cel animation technique. Read P 248, P249 and p260
  • What do you learn about animated GIF? (the characteristics) (read p256 and 257)
  • please post your understanding of the term "key frames". (p259)
  • why vector graphics is more popular than bitmapped image when creating animation? (p260)
  • What’s the general purpose of interpolation?
  • Why linear interpolation is not preferred to animate the movement of an object?
  • What does ease in and ease out mean? Why we need it?(p261)
  • what’s the other factor we should consider to achieve a natural realistic effect of an animation?
  • What’s the most popular format for Web animation?
  • Compare SWF animation and GIF animation. List advantage and disadvantage of each format.
  • Usually, ___ frames are required for each second of film and animation.

Ch6 Study Guide

  1. List one file format that is usually used to deliver web animation? _____________
  2. T/F: Video formats could be used to deliver animation.________
  3. List at least three video format:_________________, _________________, ________________
  4. ___________________ and _______________ are the two major video/TV standards. In US, _____________ standard is used.
  5. Which color system video usually use?___________________ . What is the basic idea of this color system?
  6. understand why sub-sampling and compression is important. Be able to calculate the file size with NO compression.
  7. Please explain the three subsampling method.
  8. Why do we apply subsampling? (the ultimate goal)
  9. Define spatial compression.
  10. Define temporal compression.
  11. In general, how video is compressed?
  12. What is motion compensation? (please read your book and express the answer in your own words. Do not copy from the slide. )
  13. WMV is a video format developed by _____________________(which company).
  14. AVI is a video format developed by _____________________.
  15. MOV is a video format developed by ___________________.
  16. T/F and why: FLV is a format design to deliver animation only, it cannot be used to deliver recorded video.
  17. What makes ogg video format unique?
  18. When you finished editing your movie and ready to export it as a movie file, you should always be conscious about the file size. List three factors/parameters that could be adjusted to reduce the file size ______________________, ______________________, ______________________.
  19. When a user is watching a video on the Internet, different technologies have been applied to deliver it. (please read p235, 236, 237 for Delivery)
  20. In class, we introduced _______________ streaming and _______________ streaming.
  21. Please explain the two streaming technologies.
  22. T/F and why: MP4 is an audio standard that has better compression than MP3. _____
  23. Read page 240, 241: summarize the format, software, and associated platform (Operating system) for videos as shown below.
  24. ____________________(name of the software) is usually used to play a video when MOV format is detected by the computer. Mov format is associated with ____ operating system
  25. __________________________ is usually used to play a video when AVI or WMV format is detected. WMV is associate with _____ operating system.
  26. Understand the platform problem with different video formats. Why FLV is popular? (page 240)
  27. What is codec? Is it created in the form of software of hardware?
  28. Understand HTTP streaming (go over the math exercises on slides)


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