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HW #5: SMIL, Multimedia Synchronization, and 
Video on Demand

Goal:

Learn to create Web-based synchronized multimedia presentation using SMIL.

Learn Multimedia Synchronization Issues.

Learn Basic Video on Demand Design.

Assignment Date: 4/19/2010

Due Date: 4/26/2010

• http://cs.uccs.edu/~cs525/smil/smil.htm
• http://service.real.com/help/library/guides/production/htmfiles/smil.htm#100023
• http://cs.uccs.edu/~cs525/synmm/synmm.htm
• http://cs.uccs.edu/~cs525/vod/vod.htm
• The two related papers.

Description:
Part 1: Author Multimedia Presentation Using SMIL

• Using SMIL to create a multimedia presentation, hw4.smi, where
• It starts with a background music  which consists of the first 5 seconds of a midi file, such as canyon.mid,  followed by another music file passport.mid. Both are in ~cs525/public_html/smil/.
• After 1 second, plays the a short video of your choice.
• After  2 second, plays a short recorded voice of your.
• After the short video, play recorded voice with concluding remarks.
• Recording the two voice files with application of your choice.
• Copy all these media files to your public_html/smil directory.
• Create a link from your web page to this hw5.smi.
• Email me the ur of the SMIL file.

Part 2:  Multimedia Synchronization

Specify the hw5 part1 smail multimedia presentation using the primitives provided by the enhanced interval-based synchronization specification method.

Assume 3 Mbps instead of 1.5Mbps is used to provide the transport of a 100 minute NTSC movie stored in the copier memory. Here we assume a fixed rate encoding. We plan to use a Ultra Wide SCSI-2 disk with 4 heads (each head with
40 Mbps data transfer rate) and 40 MBps SCSI channel transfer rate to deliver the movie.
1. How many bytes of disk space are needed to store the movie?
2. Assume a fixed rate encoding, i.e., each frame is encoded into the same amount of bits, how many bits are used to encode a frame?
3. How many phases can each head produce?
4. With 4 heads per movie, how long is a phase?
5. How many frames will be read by each head?
6. Let the answer in 3) be n. The frames read by each head will be grouped into blocks and each block contains n frames. How many blocks will be read by a head?
7. Starting with frame 0, show all the frame ID numbers in the first block. Similar to that in Figure 4 of Sincoskie’s paper.
8. Without additional buffer, what is the longest time that a customer has to wait before seeing the movie?

You can substitute the UltraWideSCSI-2 disk with new SAS drive for the above execrcise.