​You are cordially invited to attend this week's CSE 699/ICS 599/COE 599 following Graduate Seminars: 

Location: 22 - 130

Date: Wednesday Nov. 27, 2013 

First Seminar:

Duration: 2:30 - 3:10 pm

Speaker: Mr. Mohammad Al-Hammouri, COE Department 

Title: Performance evaluation of H. 264/SVC video streaming over mobile WiMAX

Abstract

Mobile broadband wireless networks, such as mobile WiMAX, have been designed to support several features like, e.g., Quality of Service (QoS) or enhanced data protection mechanisms, in order to provide true access to real-time multimedia applications like Voice over IP or Video on Demand. On the other hand, recently defined video coding schemes, like H.264 scalable video coding (H.264/SVC), are evolving in order to better adapt to such mobile environments with heterogeneous clients and time-varying available capacity. In this work we assess the performance of H.264/SVC video streaming over mobile WiMAX under realistic network conditions. To this aim, we make use of specific metrics, like PSNR (Peak Signal to Noise Ratio) or MOS (Mean Opinion Score), which are related to the quality of experience as perceived by the end user. Simulation results show that the performance is sensitive to the different available H.264/SVC encoding options, which respond differently to the loss of data in the network. On the other hand, if aggressive error recovery based on WiMAX data protection mechanisms is used, this might lead to unacceptable latencies in the video play out, especially for those mobiles with poor wireless channel characteristics.

Biography

Mr. Mohammad Al-Hammouri received his BS in Computer Engineering from Yarmouk University, Irbid, Jordan in 2009 and is currently pursuing MS in Computer Engineering at King Fahd University of Petroleum and Minerals. He has worked about 3 years as a Software Engineer developing in Information technology center/Yarmouk University. His research interests include Data Distribution service/Multimedia Streaming.

Second Seminar:

Duration 3:10 - 3:50 pm

Speaker: Mr. Faisal Saleh, ICS Department

Title: An efficient and secure approach for a cloud collaborative editing

Abstract

As storage on the cloud becomes more accessible, collaborative editing is gaining popularity. Multiple users can now access and work on the same document at the same time. Such usage of the data can function adversely due to the mechanisms in place to secure data. Data encryption is one of the ways in which data is protected and secured. During collaborative edition, small changes while editing documents require the encryption of the full document to be uploaded to other users. The efficiently encrypt data, this paper presents a framework using the Red–Black tree, named rbTree-Doc. The rbTree-Doc reduces the amount of data to be encrypted. Although the trade-off for creating the Red–Black tree introduces extra cost, the experimental results of using rbTree-Doc in text editing operations, such as insertion and removal, show improved efficiency compared with other whole-document encryption strategy.            

Biography

Mr. Faisal Saleh received his BS in Computer Science from Institute of Business Administration, Karachi, Pakistan in 2009 and is currently pursuing MS in Computer Science at King Fahd University of Petroleum and Minerals. He has worked two years as a Software Engineer developing mobile applications for iPad and J2ME. His research interests include visual effectiveness of requirement engineering notations and cloud computing.