http://dlib.iit.ac.lk/xmlui/handle/123456789/44 Wed, 08 Apr 2026 18:04:09 GMT 2026-04-08T18:04:09Z http://dlib.iit.ac.lk/xmlui/handle/123456789/441 Fast H.264/AVC to HEVC transcoding using mode merging and mode mapping Nagaraghatta, Akshay; Zhao, Yafan; Maxwell, Grant; Kannangara, Sampath A fast H.264/AVC to HEVC transcoding algorithm using motion vector based mode merging and conditional probability based mode mapping is proposed in this paper. Reusing the incoming H.264 block modes directly does not give the best Rate Distortion performance in HEVC. Motion vector variance is used to predict the possible merge of the H.264 blocks at coding depths 0 and 1 in HEVC. A conditional probability based mathematical model is developed to predict the two most probable modes at coding depths 2 and 3 of the HEVC encoding stage. Results show around 50 percent complexity reduction with negligible rate distortion loss. Thu, 01 Jan 2015 00:00:00 GMT http://dlib.iit.ac.lk/xmlui/handle/123456789/441 2015-01-01T00:00:00Z http://dlib.iit.ac.lk/xmlui/handle/123456789/48 REST with RIA-Bus for Efficient Communication and Modularity in Rich Internet Applications Dissanayake, N. R.; Wirasingha, T.; Dias, G. A. K. Rich Internet Applications give a rich set of features and an enhanced user experience, but the engineering of Rich Internet Applications comes with complexities, mainly due to poor realization caused by the lack of architectural formalism. If we can realize the architectural properties of Rich Internet Applications well, it might reduce the engineering complexities and the development of Rich Internet Applications may too offer a good experience. In this paper we discuss enhancing the structure and modularity of our proposed concept RIABus, by integrating the customized version of the REST style. We expect to evolve this hybrid style further to come up with an abstract architectural style for Rich Internet Applications. Thu, 01 Jan 2015 00:00:00 GMT http://dlib.iit.ac.lk/xmlui/handle/123456789/48 2015-01-01T00:00:00Z http://dlib.iit.ac.lk/xmlui/handle/123456789/47 Comparison of the Efficiency of Using HTML over XML and JSON for the Asynchronous Communication in Rich Internet Applications Dissanayake, N. R.; De Silva, D; Dias, G. A. K. Rich Internet Applications use XML or JSON to format the data in asynchronous communication, which engaged a serialization process in the server and a de-serialization process in the client. If we use HTML to format the data it can get rid of the de-serialization process and make the development easier. In this paper we compare the efficiency of using HTML over XML and JSON, for asynchronous communication in Rich Internet Applications, by the means of time and the size of the data. Based on the results, we expect to introduce a set a facts to consider when selecting the technique / technology for the asynchronous communication in Rich Internet Applications. Thu, 01 Jan 2015 00:00:00 GMT http://dlib.iit.ac.lk/xmlui/handle/123456789/47 2015-01-01T00:00:00Z http://dlib.iit.ac.lk/xmlui/handle/123456789/46 Real-Time Audio Streams Synchronizing in mobile Devices Dissanayake, N. R.; Rodrigo, K Real-time audio has been around for some times but applications of it was only used in professional market for transmitting audio via digital data links. Since the advent of smart phones, a new application for this technology is discovered where real-time audio streaming can be used in mobile platforms to create synchronized music playing, where the real-time synchronization is a challenging task. Real-time synchronized playing can be used for sharing the music experience with multiple people, in real-time, thus creating a customized radio station with the clients music. And instead of using one mobile device to play music, by pooling multiple devices in close range can amplifies the audio significantly through the synergy of multiple synchronized playback in multiple devices. We present and discuss – in this paper – an analysis of features of some available products. In our ongoing research we hope to analyze the technologies and concepts available and identify the limitations of real-time synchronous audio playback, hence propose a better solution to overcome the issues in real-time audio synchronization Thu, 01 Jan 2015 00:00:00 GMT http://dlib.iit.ac.lk/xmlui/handle/123456789/46 2015-01-01T00:00:00Z