Realization and Evaluation of an End-to-End Low Latency Live DASH System

The paper presents a prototypical realization and performance results for a DASH low latency live distribution system. The concept is based on multi-fragment segments and HTTP chunked delivery. A DASH server makes fractions of a segment, called here fragments, available before the full segment is encoded and packaged. A client can retrieve available fragments using HTTP chunked delivery, thus reducing packaging, distribution and playout latencies. The implementation focuses on the usage of HTML5 browser-based players (using the Media Source Extension) and on the separation of the DASH packager and HTTP origin. Both functionalities are widely used in today's video service realizations. Different from earlier works, our paper evaluates the system distribution latency in real deployments and provides measurements and simulation results which illustrate the latency reductions.