Data streaming technics

File Type	Description
html	I used HTML markup language for a browser to interpreted and display it the way I wanted it to look. Also the HTML format is a formal Recommendation by the World Wide Web Consortium (W3C). It is a version 4 but it also use features describe as dynamic HTML such as behaviours (for menu buttons). The content of most of the pages is a combination of two media type: text and graphics. Furthermore one of the pages has emended several video files. Layout of the pages is supported with using CSS (Cascading Style Sheet) that has been placed in the head of each html document. The document is structured with use of tables. All the html files were uploaded to the host server with use of FTP data transfer software in this case it is FileZilla version 2.2.18.
jpg gif	All of the graphics used throughout the web page was saved as a jpg or gif files. All of them where optimized for the web page while simultaneous keeping the maximum possible quality. Just an example: image021.jpg file (Fig.4 Sample Video Streaming Architecture with Streaming Server) was originally 58.1 KB with the dimensions: 555x573 and the resolution 96dpi which was already not the perfect quality. I change the dimension of it to 500x474 so it fit easily within the design table. I also optimized it (with the use of Adobe Photoshop) with further decrees in the quality (50%) which wasn't a perceptual change. New file was the same dpi but it shrinks to 31.7KB. That with the modem speed of average 56Kbps would take about 0.6 sec. It may not be significant change but if all the file would be optimized this way it could decrease the time of download by half.
doc	I used document file that I linked to from the html file as I decided that information weren't so important to save it as an html file. And also it might be useful for the user to have this information handy and ready for quick print out. The size of the file is 128KB which even with slow modem connection will take literally seconds to download.
psd	I used psd file while I was working on page layout using Adobe Photoshop to achieve desire look and then Adobe Illustrator to slice the image and save it as a separated jpg or gif images. The working psd files are usually rather big, this one was only around 3MB.
vsd	To prepare some of the charts I used Microsoft Visio software. When the vsd file was ready (300KB) I exported it to a gif format (96dpi, 530x400, 23KB).
zip	Zip format was used to store working files on my disk so they can be compressed to save the disk space. Uncompressed files 12MB => compressed (using ZipGenuine) 6MB. The reason for such a big compression could be the format of the data compressed. There were not many huge graphic files, instead a lot of easy to optimize doc files.
flv	Emembed video files are streamed from YouTube server that mostly use Flv format. Played by YouTube files are limited in both size and the quality. The size is limited to pixel dimensions of 320 by 240 and the quality is limited to a bitrate of around 314kbit/s with a frame rate dependent on the uploaded video (1). YouTube limits the playback size and quality by re-encoding the user's uploaded video at the time of upload when it converts videos into .FLV (Adobe Flash Video) format. The different files are stored in obscurely named subdomains, accessible either directly or through YouTube's get_video PHP script. YouTube also converts content to other formats so that it can be viewed outside of the website. Officially accepted uploaded videos are in .WMV, .AVI, .MOV, MPEG and .MP4, formats. YouTube's video playback technology is based on Macromedia's Flash Player 7 and uses the Sorenson Spark H.263 video codec. This technology allows the site to display videos with quality comparable to more established video playback technologies (such as Windows Media Player, QuickTime and RealPlayer) that generally require the user to download and install a web browser plugin in order to view video. Flash also requires a plug-in, but Adobe considers the Flash 7 plug-in to be present on about 90% of online computers(2)

Data source:
1) Verified by analysing internal structure of, and playing, newly uploaded videos, 2007-11-19
2) Adobe Flash Player Version Penetration Adobe