CS4624 StudyQuestions - MC

Optional: Old Questions for Buford Chapters: 6, 7

Other Questions (Hypermedia Models)

Questions related to text chapters:

• When is lossless compression required instead of lossy compression? Vice versa?
• When does run-length compression help? Hurt?
• What is the difference between the 3 FAX standards? In what situations is each preferred?
• How does Huffman encoding relate to probabilities?
• What are the advantages / disadvantages for FAX of encoding groups of K-lines at once?
• Why might a blue laser allow more data to be stored on a optical disc than a red laser?
• What type of computation is needed to convert between images stored in various color models?
• How does NTSC color relate to the old black and white TV standard?
• Why are CIE XYZ and YUV more suitable for compression than RGB?
• What is a codec?
• Why is DCT used instead of the Fourier transform?
• How do zigzag encoding and run-length encoding fit together?
• In what situations would a user accept progressive mode instead of sequential mode?
• What are the 4 component modes of JPEG?
• How does arithmetic coding save space relative to Huffman coding?
• Why might arithmetic coding work better than Huffman coding for an unusual type of image?
• How is image energy spread among the DCT coefficients?
• What requirements were identified by the MPEG group?
• How does H.261 differ from MPEG?
• What is the difference between CIF and QCIF? When is each appropriate to use?
• How does image resolution relate to selection of video compression standards?
• What is the difference between MPEG 1 and MPEG 2?
• What are the different types of pictures coded by MPEG?
• What is the role of various groupings of pictures in an MPEG stream?
• How does MPEG compress video that has motion from frame to frame?
• What is the Grand Alliance?
• Why is vector quantization good for software decompression?
• How do DVI, Indeo, VFW, and QuickTime differ?
• Why does ADPCM compress more than PCM?
• What types of images are suitable for fractal compression?
• What is the purpose of OLE?
• What is the difference between linking and embedding?