Importance

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Abstract

A dynamic bandwidth adaptation (DBA) algorithm is provided, such as for RTP/UDP/IP-based 2.5 G and 3 G wireless streaming systems. The DBA algorithm enables steady streaming quality and smooth transitions during congestion and network resource fluctuation periods, by automatically adjusting the video or audio bit rate stream to suit a changing bandwidth of a channel. The DBA algorithm monitors the channel for statistically significant and persistent changes in the bandwidth that may be associated with packet loss, delay, or delay variation. When these changes occur and when there is an existing closely matching but lower bit rate stream, the streaming server switches over to that lower stream. Switching to a higher bit rate stream may also be performed. Base delay or delay variation tracking information is used to further determine, improve, and optimize bandwidth adaptation. Data from a pause event is not collected, thereby improving the statistical analysis and decision-making process related to actual streaming.

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First Claim