CoolStreaming

CoolStreaming is a P2PTV (peer-to-peer television) technology that enables users to share television content with each other over the Internet. The technology behind CoolStreaming is similar to that of BitTorrent. The viewers upload content at the same time the programs are downloaded and viewed. CoolStreaming creates a local stream on localhost and that stream is then read by Windows Media Player, Real Player or other media players. The original coolstreaming code is developed with Python 2.3 on Windows.

Coolstreaming is a data-centric design of peer-to-peer streaming overlay. Notable features of the protocol include its intelligent scheduling algorithm that copes well with the bandwidth differences of uploading clients and thus minimises skipping during playback, and its swarm-style architecture that uses a directed graph based on gossip algorithims to broadcast content availability.

Coolstreaming is the first P2PTV system that attracts a remarkable amount of clients (over 1 million, while most of the previous systems attracted less than 1 thousand clients).

As of June 10, 2005 the Coolstreaming service had stopped due to copyright issues. However, there are several alternative services.

CoolStreaming is the base technology for Roxbeam Corp., which launched live IPTV programs jointly with Yahoo Japan in October 2006.

External links

• CoolStreaming/DONet: A Data-Driven Overlay Network for Efficient Live Media Streaming
• Coolstreaming: Design, Theory and Practice
• An Empirical Study of the Coolstreaming+ System
• A Measurement of a large-scale Peer-to-Peer Live Video Streaming System
• Inside the New Coolstreaming: Principles, Measurements and Performance Implications

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