Mr. Rama Rao Ganji Profile

Rama Rao Ganji

at Telecom SudParis

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Proceedings Article | 11 March 2015 Paper

Cross-standard user description in mobile, medical oriented virtual collaborative environments

Rama Rao Ganji, Mihai Mitrea, Bojan Joveski, Afef Chammem

Proceedings Volume 9411, 94110G (2015) https://doi.org/10.1117/12.2081177

KEYWORDS: Multimedia, Image quality, Virtual reality, Internet, Visualization, Operating systems, Medical imaging, Video, Standards development, Mobile devices

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By combining four different open standards belonging to the ISO/IEC JTC1/SC29 WG11 (a.k.a. MPEG) and W3C, this paper advances an architecture for mobile, medical oriented virtual collaborative environments. The various users are represented according to MPEG-UD (MPEG User Description) while the security issues are dealt with by deploying the WebID principles. On the server side, irrespective of their elementary types (text, image, video, 3D, …), the medical data are aggregated into hierarchical, interactive multimedia scenes which are alternatively represented into MPEG-4 BiFS or HTML5 standards. This way, each type of content can be optimally encoded according to its particular constraints (semantic, medical practice, network conditions, etc.). The mobile device should ensure only the displaying of the content (inside an MPEG player or an HTML5 browser) and the capturing of the user interaction. The overall architecture is implemented and tested under the framework of the MEDUSA European project, in partnership with medical institutions. The testbed considers a server emulated by a PC and heterogeneous user devices (tablets, smartphones, laptops) running under iOS, Android and Windows operating systems. The connection between the users and the server is alternatively ensured by WiFi and 3G/4G networks.

Proceedings Article | 18 February 2014 Paper

MPEG-4 solutions for virtualizing RDP-based applications

Bojan Joveski, Mihai Mitrea, Rama-Rao Ganji

Proceedings Volume 9030, 90300A (2014) https://doi.org/10.1117/12.2042342

KEYWORDS: Visualization, Multimedia, Internet, Clouds, Mobile devices, Computer architecture, Quality measurement, Computer programming, Manufacturing, Video

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The present paper provides the proof-of-concepts for the use of the MPEG-4 multimedia scene representations (BiFS and LASeR) as a virtualization tool for RDP-based applications (e.g. MS Windows applications). Two main applicative benefits are thus granted. First, any legacy application can be virtualized without additional programming effort. Second, heterogeneous mobile devices (different manufacturers, OS) can collaboratively enjoy full multimedia experiences. From the methodological point of view, the main novelty consists in (1) designing an architecture allowing the conversion of the RDP content into a semantic multimedia scene-graph and its subsequent rendering on the client and (2) providing the underlying scene graph management and interactivity tools. Experiments consider 5 users and two RDP applications (MS Word and Internet Explorer), and benchmark our solution against two state-of-the-art technologies (VNC and FreeRDP). The visual quality is evaluated by six objective measures (e.g. PSNR<37dB, SSIM<0.99). The network traffic evaluation shows that: (1) for text editing, the MPEG-based solutions outperforms the VNC by a factor 1.8 while being 2 times heavier then the FreeRDP; (2) for Internet browsing, the MPEG solutions outperform both VNC and FreeRDP by factors of 1.9 and 1.5, respectively. The average round-trip times (less than 40ms) cope with real-time application constraints.

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