Media Server Streaming Elizabeth Canela David Vera Bernard James Lilian Ohanian

INTRODUCTION Today’s Internet is increasingly used for transfer of continuous-media data, such as video from news, sports, and entertainment Web sites, and audio from Internet broadcast radio and telephony. Streaming-media content presents a number of new challenges to systems designers.

BACKGROUND Refers to the transfer of live or stored multimedia data. A wide variety of streaming-media applications are in use today on the Internet. Streaming data is often transmitted over UDP [14].

MEDIA SERVER STREAMER Allows users to conveniently store, share and play back photos, music, high definition videos etc., over a home network. It has integrated storage so you can stream content from another computer, network storage device or access it directly from the internal hard drive.

HOW IT WORKS The compressed media file is produced and copied to a specialized streaming media server (such as Microsoft Windows Media Services). The data is actively and intelligently sent to the client, meaning that it delivers the content at the exact data rate associated with the compressed audio and video streams. The server and the client stay in close touch during the delivery process, and the streaming media server can respond to any feedback from the client.

HARDWARE TOPOLOGY

PROTOCOLS Protocol Rollover If clients that support RTSP connect to a server running Windows Media Services using an RTSP URL moniker (for example, rtsp://) or an MMS URL moniker (for example, mms://), the server uses protocol rollover to stream the content to the client to provide an optimal streaming experience. Automatic protocol rollover from RTSP/MMS to RTSP with UDP-based or TCP-based transports (RTSPU or RTSPT), or even HTTP (if the WMS HTTP Server Control Protocol plug-in is enabled) may occur as the server tries to negotiate the best protocol and provide an optimal streaming experience for the client.

PROTOCOLS Microsoft Media Server (MMS) protocol A proprietary protocol using UDP or TCP to deliver content as a unicast stream. Transmission Control Protocol (TCP) The protocol within TCP/IP that governs the breakup of data messages into packets to be sent via IP, and the reassembly and verification of the complete messages from packets received by IP. User Datagram Protocol (UDP) A connectionless transport protocol in the TCP/IP protocol stack that is used in cases where some packet loss is acceptable, for example, with digital media streams.

SECURITY Key Features in Media Services 9: Internet Connection Firewall: Internet Connection Firewall (ICF) provides protection to computers directly connected to the Internet, or to computers located behind an Internet Connection Sharing (ICS) host computer that is running ICF.

SECURITY Windows Firewall in Windows Server 2003 with SP1 is a host firewall technology that replaces Internet Connection Firewall (ICF). Windows Firewall provides state full inspection of incoming IPv4 and IPv6 traffic and is designed to protect you from network attacks that pass through your perimeter network or originate inside your organization, such as Trojan horse attacks, port scanning attacks, and worms

SECURITY Key Features in Media Services: System Security Improvements Increased performance improvement of over 35 percent when using the secure sockets layer (SSL).

SECURITY Key Features in Media Services 9: Data Protection Stored data (online or offline) can be protected using Encrypting File System (EFS) and digital signatures. Internet Protocol security (IPSec) and PPTP encryption.

SECURITY Key Features in Media Services 9: Windows Media Rights Management

ADVANTAGES More Efficient Network Throughput. Better Audio and Video Quality to the User. Support for Advanced Features. Cost Effective Scalability to Large Number of Users. Specialization Multicast Support Protection of Content Copyright. Multiple Delivery Options.

GLOSSARY CO-DEC - a COmpression-DECompression algorithm used for efficient storage and transmission of a data file, such as a video or audio file. MPEG - the Moving Picture Experts Group defines industry standards for the encoding, management, and delivery of content through various media. MPEG-1 - a codec designed for near-VHS quality video. MPEG- 1 is primarily designed for CD-ROM delivery of content through various media. MPEG-2 - a codec designed for high-quality video. MPEG-2 is primarily used for DVD disc encoding and other high-quality archival solutions, but can be streamed over high-bandwidth connections, such as Internet2. MPEG-2 playback often requires additional software and/or hardware.

GLOSSARY MP3 - a codec designed for audio. MP3 is the most popular standard used for distribution on the Internet and in portable music players, such as Apple’s iPod. Note that MP3 stands for MPEG Audio Layer 3, not MPEG-3 (there is no MPEG-3). MPEG-4 - built around non-proprietary codecs, MPEG-4 excels at multi-architecture compatibility. Future codecs should enhance quality.

GLOSSARY Real - built around proprietary RealNetworks codecs, Real format excels at low to medium bandwidth clips. It supports MPEG-4. Producers can use the SMIL language to add interactivity. Windows Media - built around proprietary Microsoft codecs, Windows Media excels at medium bandwidth clips. It does not support MPEG-4. QuickTime - built around several non-proprietary codecs, QuickTime excels at medium to high bandwidth clips. It supports MPEG-4.

CONCLUSION We feel Media Server Streamer would be the best choice of transferring files, programs, etc: Because of safety, speed, and availability to people who need this service. With Media Server Streamer, the information is stored and has been cleaned up for prompt transfer whereas downloading directly from the Internet can be time consuming and more subject to get a virus.

REFERENCES ges/Tongquat.gif a/compare/webservvstreamserv.aspx a/serve/firewall.aspx#Encoder ity/default.htm

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