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With the growing maturity of the cloud computing paradigm, clouds are increasingly used for the delivery of complex multimedia services, rather than just simple infrastructure offers. A popular example of such services is cloud gaming, where video games are executed in the cloud and delivered to a (mobile) client via the Internet. While cloud gaming shifts the computationally complex and energetically...
We study how much energy can be saved by reshaping audio streaming traffic before receiving at the mobile devices. The rationale is the following: Mobile network interfaces (WLAN and 3G) are in active mode when they transmit or receive data, otherwise they are in idle/sleep mode. To save energy, minimum possible time should be spent in active mode and maximum in idle/sleep mode. It is well known that...
This paper presents a method for supporting wireless media streaming using a cache that is distributed across the mobile devices in the network. The performance of this scheme is compared to traditional institutional server (IS) caching on a network with a bandwidth constrained wireless backhaul. In addition to traditional caching hit ratio metrics, the paper studies how caching affects the call drop...
Video call capabilities in 3G mobile handsets and higher data rate in 3G UMTS networks are fuelling resurgence in video telephony. This enables the delivery of exciting video applications to subscribers. The addition of interactive voice and video response (IVVR) opens up a wide stream of interactive video applications. In this paper we present a comparative study on the encoding tools and the techniques...
The demand for video content is continuously increasing as video sharing on the Internet is becoming enormously popular recently. This demand, with its high bandwidth requirements, has a considerable impact on the load of the network infrastructure. As more users access videos from their mobile devices, the load on the current wireless infrastructure (which has limited capacity) will be even more...
To understand the technical feasibility and user perception of mobile video, we conducted a two-week trial where a student community used mobile phone and Web technologies to share the events of a campus festival. The questions we investigated included the capability of contemporary smart phones to capture and share the events via real time and stored video; the usage patterns that arise within mobile...
This paper targets mobile streaming in which Series 60 smart phones are the stream creators and PC-s are the stream consumers. The aim is to provide experimental data reflecting under which conditions video streaming from smart phones is feasible and whether duplex interactive video between a phone and a PC can be achieved or not. Phones used corporate WiFi and UMTS, PC-s were on the corporate Intranet...
The proliferation of mobile broadcast networks and home multimedia networks makes relevant considering a new level of digital convergence. One aspect is the integration of mobile content access to the home network. In this framework, a mobile device serves as a gateway for real time content rebroadcast. This paper investigates the mobile rebroadcasting problem and implementation between the Mobile...
This contribution addresses the case when live packet-switched video is used to enrich circuit-switched speech calls in mobile telephony. Circuit-switched and packet-switched transmissions generally operate on completely different transmission paths resulting in different QoS in terms of delay and loss rates. In this case, video and audio data recorded at the same time are not multiplexed together...
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