Abstract: Recent growth in popularity of mobile services raises a demand for transcoding. Transcoding is the most important and a convenient method for delivering multimedia content to the heterogeneous devices over WLAN. However, currently existing mobile devices such as smart phones, tablet PCs and smart TVs involves an issue of separate video transcoding for each type. Thus, additional burden comes to media servers which pre-transcode the multimedia data for number of clients and hence the problem of media servers overload. A straight forward solution for relieving media servers can be to localize transcoding of a video to the client side, that is, to move it from a media server to the mobile device involved in the video call. Besides, transcoding process consumes a great amount of energy apparently, the capacity of the mobile device battery will not be enough to finish the video calls. To struggle against the problem we propose a cooperative media streaming where Media-Aware Network Elements (MANE) such as media gateways will transcode the received media stream to minimize the energy usage of mobile device. Thus, mobile device can receive personally customized live video stream from MANE meanwhile the overload of media servers and the process of transcoding overhead of mobile device is reduced. Our research in this study cooperated media streaming solves the issues of energy usage for transcoding in mobile device by giving transcoding and real-time delivery responsibility to the MANE. We consider the basic steps that the MANE takes to decide when and how to transcode the received media stream and work together to adapt and optimize the real-time delivery of the audio and video streams provided by the application.
J.T. Anita Rose, A. Chandrasekar and D. Frederick Swartz Daniel, 2016. Cooperative Media Streaming and Transcoding on Live Video Chat over VoIP. Asian Journal of Information Technology, 15: 5145-5153.