3.1) Adaptive update.

3.1) Adaptive update.

A set of rectangles of pixel data makes a frame buffer update. An update is a change from one valid frame buffer state to another. In this sense an update is similar to a frame of video[1]. It differs; however in that it usually affects only small area of the framebuffer.Each rectangle may be encoded using a different scheme. The server can therefore choose content encoding, most appropriate for a particular screen content being transmitted and the available network bandwidth[1]. The update is only driven by the client. This gives the protocol an adaptive quality, the slower the client and the network, the slower the rate of updates.

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