stream.ppt

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  • Quicktime audio lectures Sample rate 8kHz Sample size 16 bit Qualcomm Purevoice 17 minute clip = 2.6 megs rate =2.6 kbytes per second ECON 105 .1 FPS 1.6 MB size rate = 1.3 K bytes/sec 20 min
  • Quicktime audio lectures Sample rate 8kHz Sample size 16 bit Qualcomm Purevoice 17 minute clip = 2.6 megs rate =2.6 kbytes per second ECON 105 .1 FPS 1.6 MB size rate = 1.3 K bytes/sec 20 min
  • Quicktime audio lectures Sample rate 8kHz Sample size 16 bit Qualcomm Purevoice 17 minute clip = 2.6 megs rate =2.6 kbytes per second ECON 105 .1 FPS 1.6 MB size rate = 1.3 K bytes/sec 20 min
  • stream.ppt

    1. 1. Streaming Media At UMBC
    2. 2. What is Streaming? <ul><li>True streaming vs. Playback of downloaded files </li></ul><ul><li>A steady flow of data to the client </li></ul><ul><ul><li>Buffered data </li></ul></ul><ul><ul><li>Bitrate of the stream must exceed the rate at which it is played out. </li></ul></ul>
    3. 3. Streaming Media in the Corporate World <ul><li>25% large companies currently using streaming </li></ul><ul><ul><li>Advertising, branding, corporate communications and training </li></ul></ul><ul><li>Use doubled in 18 month period 2000-2001 (eBiz Oct. 2001) </li></ul>
    4. 4. The Bandwidth Bottleneck <ul><li>Broadband vs Narrowband </li></ul><ul><ul><li>Broadband in 10% of homes </li></ul></ul><ul><li>Reduce bandwidth by </li></ul><ul><ul><li>Reducing frame rate </li></ul></ul><ul><ul><li>Reducing resolution </li></ul></ul><ul><ul><li>Compression (codecs) </li></ul></ul>
    5. 5. Streaming Media Architectures <ul><li>Real Networks </li></ul><ul><ul><li>25.9M </li></ul></ul><ul><li>Windows Media </li></ul><ul><ul><li>21.5M </li></ul></ul><ul><li>QuickTime </li></ul><ul><ul><li>7.3M </li></ul></ul>Jupiter Media Metrix
    6. 6. Codecs for the Web <ul><li>Internet (Narrowband) </li></ul><ul><ul><li>Real SureStream </li></ul></ul><ul><ul><li>Sorenson (Quicktime) </li></ul></ul><ul><li>Intranet (Broadband) </li></ul><ul><ul><li>MPEG 1, 2, 4 </li></ul></ul>
    7. 7. Desktop Video <ul><li>Acquire media </li></ul><ul><li>Capture (Digitize) </li></ul><ul><li>Edit and Compress </li></ul><ul><li>Deliver </li></ul><ul><ul><li>Stream </li></ul></ul><ul><ul><li>DVD/CD-ROM </li></ul></ul><ul><ul><li>Tape </li></ul></ul>
    8. 8. Editing and Compression <ul><li>Digital editing </li></ul><ul><ul><li>Adobe Premiere </li></ul></ul><ul><ul><li>FinalCut Pro </li></ul></ul><ul><ul><li>iMovie </li></ul></ul><ul><li>Compression </li></ul><ul><ul><li>Cleaner </li></ul></ul><ul><ul><li>QuickTime, Real, WindowsMedia </li></ul></ul>
    9. 9. Delivering Content <ul><li>On-demand and Live </li></ul><ul><li>HTTP Streaming </li></ul><ul><li>QuickTime Server </li></ul><ul><li>Real Server (Helix) </li></ul><ul><li>Windows Media </li></ul>
    10. 10. Streaming at UMBC <ul><li>Internet </li></ul><ul><ul><li>Real </li></ul></ul><ul><ul><li>Quicktime </li></ul></ul><ul><li>Intranet </li></ul><ul><ul><li>IPTV </li></ul></ul><ul><ul><li>MPEG </li></ul></ul>
    11. 11. IP/TV Player <ul><li>Available on the UMBC Internet CD </li></ul><ul><li>Mac TV </li></ul><ul><li>Content also available on UMBC Streaming Media site </li></ul>
    12. 12. Streaming at UMBC Mapping the Patapsco UMBC Magazine Streaming Umbrella Group UMBC Music “ Listening Room” ResNET The Excellent Internet Adventure
    13. 13. Streaming at UMBC FINWeb Tutorials Art History Lectures FlashCom Server
    14. 14. Streaming at UMBC [email_address] Streaming Umbrella Group
    15. 15. Future Directions <ul><li>Uniform Serving? </li></ul><ul><ul><li>Helix </li></ul></ul><ul><ul><li>Mpeg4 </li></ul></ul><ul><ul><li>Simplified content creation </li></ul></ul><ul><ul><li>Broadband </li></ul></ul><ul><ul><ul><li>Faster downloads decrease need for true streaming while increasing streaming audience </li></ul></ul></ul>
    16. 16. Want to Know More?
    17. 17. Contact <ul><li>[email_address] </li></ul><ul><li>www.umbc.edu/iptv </li></ul><ul><li>www.umbc.edu/studio </li></ul>
    18. 18. Accessibility <ul><li>(6) Support Universal Accessibility to Streaming Media : </li></ul><ul><li>Effective design of streaming media content will need to consider and address the provision of </li></ul><ul><li>closed-captioning (for persons with hearing impairments), descriptive audio tracks (for persons </li></ul><ul><li>with blindness) and other Web accessibility components. In addition to aiding persons with </li></ul><ul><li>hearing impairments, closed captioning also has the potential to provide improved indexing and </li></ul><ul><li>searching of content </li></ul>
    19. 19. Capturing Media <ul><li>Capture Cards </li></ul><ul><li>FireWire (IEEE-1394) </li></ul><ul><li>Analog/Digital Converters </li></ul>

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