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Following are three categories of streaming video systems:

1. UDP streaming

2. HTTP streaming

3. Adaptive HTTP streaming

UDP streaming:

• In UDP (User Datagram Protocol) video streaming system, video is transmitted by the server at a rate at which client plays the video.

• In UDP streaming in addition to the video streaming, the session state changes are also communicated between the client and server over parallel connections.

HTTP streaming:

• In HTTP (Hyper Text Transfer Protocol) streaming, the video is stored in the server as an ordinary file. The file stored in the server is given an URL.

• When the user clicks this URL, client establishes a TCP connection with the server and sends a HTTP GET for the user specified URL that references the video.

• Server includes the video file in the HTTP response message and sends it to the client.

Adaptive HTTP streaming:

• It streams the data as per the client’s bandwidth specifications.

• Depending on the bandwidth available to the client, Adaptive HTTP streaming selects an encoding scheme to encode the video.

• Each encoding scheme have different bit rate. Low bit rate scheme gives low video quality. This is better for sending through low bandwidth links.

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