Subventions et des contributions :

Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2018-2019).

The advances in personal and mobile computing make it increasingly convenient for people to be connectedx000D
with each other via various social media network services, and share images and videos over these networks. Inx000D
particular, crowdsourced live streaming via mobile devices has become a popular application, where any userx000D
can broadcast live videos through the network, and other users can watch these videos and interact with thex000D
content providers or other viewers. Some popular events in these networks could easily attract thousands orx000D
even millions of viewers. This has posed several major challenges to the service providers of crowdsourcedx000D
live streaming. First, crowdsourced contributors are geo-distributed. Second, the crowdsourcers are often muchx000D
more dynamic than dedicated content providers. Third, the quality of service (QoS) of end-users is difficult tox000D
be guaranteed due to heterogeneous user device and network conditions.x000D
In this project, we will work with our industrial partner and develop a cloud-assisted solution for crowdsourcedx000D
live streaming system by taking full advantage of cloud computing and video coding technologies. First, wex000D
will design a generic cost-effective framework for crowdsourced live streaming to support large scalex000D
geo-distributed video crowdsourcers. Second, the heterogeneity of both broadcasters and the viewers are takenx000D
into consideration to design transcoding and bit-rate adaption strategies for the system. Third, rate control andx000D
play buffer optimization will be employed to further improve the QoS of end-users. Last, we will explore ax000D
hybrid cloud and peer-to-peer system as a possible approach for improving performance of crowdsourced livex000D
streaming.