The design and implementation of a multimedia storage server tosupport video-on-demand applications

In this paper we present the design and implementation of a client/server based multimedia architecture for supporting video-on-demand applications. We describe in detail the software architecture of the implementation along with the adopted buffering mechanism. The proposed multithreaded architecture obtains, on one hand, a high degree of parallelism at the server side, allowing both the disk controller and the network card controller work in parallel. On the other hand; at the client side, it achieves the synchronized playback of the video stream at its precise rate, decoupling this process from the reception of data through the network. Additionally, we have derived, under an engineering perspective, some services that a real-time operating system should offer to satisfy the requirements found in video-on-demand applications.This research has been supported by the Regional Research Plan of the Autonomus Community of Madrid under an F.P.I. research grant.Publicad

EFEKTIVITAS PENERAPAN MEDIA PEMBELAJARAN VIDEO TUTORIAL (MPVT) PADA MATA PELAJARAN ADMINISTRASI SERVER

Penelitian ini bertujuan untuk mengetahui efektivitas penerapan media pembelajaran video tutorial pada mata pelajaran administrasi server. Jenis penelitian ini adalah Pre-Experimental Design dengan model desain penelitian One-Group Pretest Posttest Design. Sampel diambil dari siswa kelas XI Teknik Komputer dan Jaringan SMKN 2 Kota Bandung dengan jumlah 37 siswa. Pengumpulan data untuk mengetahui penilaian ahli materi, ahli media, tanggapan siswa dan guru terhadap media pembelajaran video tutorial menggunakan angket tipe Likert dengan rentang skor 1 sampai 5. Evaluasi hasil belajar siswa menggunakan 3 ranah, yaitu afektif, kognitif, dan psikomotor dengan batasan tertentu. Pada ranah afektif aspek yang diukur adalah sikap dan tanggung jawab, pada ranah kognitif dilihat dari data Gain yang dinormalisai (N-Gain) dan pada ranah psikomotor aspek yang diukur adalah keterampilan dan ketepatan waktu. Analisis data menggunakan statitik deskriptif kuantitatif. Berdasarkan penelitian menunjukkan bahwa media pembelajaran yang diterapkan layak digunakan. Penerapan Media Pembelajaran Video Tutorial (MPVT) ditinjau dari ranah kognitif, afektif dan psikomotor pada mata pelajaran Administrasi Server dapat meningkatkan efektivitas hasil belajar siswa. Tanggapan siswa dan guru terhadap penerapan MPVT adalah baik. Kata kunci: Media Pembelajaran, Video Tutorial, Administrasi Server, One-Group Pretest Posttest Design. The study was aimed to discover tutorial video implementation effectivity as a learning media in improving computer and network students’ learning outcome at SMKN 2 Bandung in server administration subject. A pre-experimental research with one-group pretest posttest was used as the design. The sample was taken from 11th year of computer and network students with 37 students in total. Likert-scale questionnaires with 1-5 score range were used to collect the data. The evaluation of student learning outcomes was conducted upon the three domains, namely affective, cognitive and psychomotor. The affective aspect aimed to measure attitude and responsibility, the cognitive obser the data Gain Normalisation (N-Gain), the psychomotor aspects measured skills and punctuality. The data were analysed using quantitative descriptive statistic. The results showed that learning media that was used to improve students’ learning outcomes was good. Tutorial Video Learning Media (MPVT) application could improve students’ learning outcomes effectivity in server administration subject in cognitive, affective and psychomotor domains. Students’ and teachers’ opinions towards MPVT application to improve students’ learning outcomes were positive. Keywords: Learning Media, Video Tutorials, Administration Server, One-Group Pretest Posttest Design

Blockchain for Online Video Game Integrity

With the growing level competition in video games, especially with regards to competitively played video games known as ”e-sports,” many players are searching for methods of gaining competitive advantages. As such, there is growing demand in software exploits of video games that aim to provide players unfair competitive advantages. Colloquially, these software exlpoits are referred to as “cheats” or “hacks.” Video game developers counteract these exploits by implementing “anti-cheat” technologies. Anti-cheats employ a myriad of complex methods across software, network, and hardware to detect and prevent cheats. They can be implemented both client-side and server-side with current research and implementations relying heavily client-side. This is an issue, however, as client-side implementations are open to inspection and alteration by malicious users looking to bypass the anti-cheat, who often succeed. Integrity of players’ actions in online video games cannot be fully maintained with current client-side anti-cheat technologies. Blockchain, however, by design can ensure that integrity is maintained across an entire network. This project explores using blockchain as the core of a server-side anti cheat implementation. With this method, each player is a member of the anti-cheat blockchain, ensuring integrity of player actions by validating player actions upon consensus

Autonomous video compression system for environmental monitoring

[EN] The monitoring of natural environments is becoming a very controversial topic because people are more and more concerned about preserving and monitoring these natural spaces. The monitoring tasks are usually complemented with a network infrastructure composed by cameras and network devices that make easy the remote visualization of the monitored environments. This work presents the design, implementation and test of an autonomous video compression system for environmental monitoring. The system is based on a server in charge of collecting the videos and analyzing the network constraints. As a function of the measured parameters and the predominant color of the requested video, the system determines the best compression codec for transmitting the video through the network. Additionally, the server should run an algorithm developed in Python and MATLAB(c) in charge of analyzing the RED-GREEN-BLUE (RGB) components of the video and performing the transcoding tasks. The system has been tested with different videos and the results of Quality of Service (QoS) and Quality of Experience (QoE) shows that H264 is a good option when the predominant color of videos are black or white while XVID is one the codecs that offer interesting results when colors as red, green or blue are predominant in the video.This work has been supported by the Programa para la Formación de Personal Investigador (FPI-2015-S2-884) by the Universitat Politecnica de Valencia . The research leading to these results has received funding from la Caixa Foundation and Triptolemos FoundationMateos-Cañas, I.; Sendra, S.; Lloret, J.; Jimenez, JM. (2017). Autonomous video compression system for environmental monitoring. Network Protocols and Algorithms. 9(1-2):48-70. https://doi.org/10.5296/npa.v9i1-2.12386S487091-

The design and analysis of a corporate data network supporting a real-time clinical data application

In this study a design is proposed for a corporate, data network supporting real-time data applications. The proposed network incorporates both Local Area Network and Wide Area Network technologies to form a system capable of supporting a variety of applications. Multimedia software, like desktop video conferencing, IP telephony, and video streaming are becoming more pervasive. Since multimedia applications depend on active human involvement and perception, they are commonly referred to as real-time. The content of real-time applications relies on the timely and consistent delivery of information. If real-time applications experience any variation in information delivery, usually referred to as jitter, the result is unacceptable application performance. However, real-time applications are not solely limited to traditional multimedia. Interactive client-server based data applications also fall into this category. This project will specifically focus on the performance of a real-time clinical application, which has become predominant in the healthcare industry. To support the implementation of the proposed network, empirical data was gathered from system testing. Testing involved comparing the performance of a real-time application on the proposed design, against the current architecture. The result found that the proposed data network design reduced transport latency, allowing the real-time application to perform more efficiently

INOVASI PEMBELAJARAN BERBASIS VIDEO STREAMING DAN JARINGAN TELEKOMUNIKASI DI PERGURUAN TINGGI

ABSTRACTIn certain study programs, especially electrical engineering, informatic engineering, information system and the like there are courses in computer program design. In this case, lecturer provides the learning how to design a computer program with a specific programming language systematically and sequentially, step by step. To increase the role of lecturer of the computer program design in a college, requires the implementation of a multimedia technology that can guarantee the systematic and sequential learning, step by step, especially when in a certain condition, the student is unable to attend the computer program design course given lecturer in the class. Although it may be found the equivalent tutorial on the internet, but the student still need the learning from lecturer. On the other hand, the lecturer of the computer program design is hard to repeat the explanation of the course given at the previous meeting to the absent student in the class, as it can spend the time already allocated for the next course explanation. In this paper provided a solution to overcome these problems by creating a streaming video provider server of computer program design courses that have been given lecturers at previous meeting in class. Access to streaming video is limited, accessible only to students who follow the course of computer program design through WLAN network on the college where the student is in college and when the end of the semester, the database server containing that streaming video is deleted by the system automatically so it can be filled with video streaming of next semester lectures, so as to save bandwidth and server memory. The explanation in this paper is limited to how to access streaming video in Wireless Local Area Network (WLAN). The methodology used is to simulate WLAN network with one computer as Learning Server and two laptops as client terminal. Keywords: Learning Server, Wireless LAN (WLAN), progra

Adaptive filtering of MPEG system streams in IP networks

Congestion and large differences in available link bandwidth create challenges for the design of applications that want to deliver high quality video over the Internet. We present an efficient adaptive filter for MPEG System streams that can be placed in the network (e.g., as an active service). This filter adjusts the bandwidth demands of an MPEG System stream to the available bandwidth without transcoding while maintaining synchronization between the streams embedded in the MPEG System. The filter is network-friendly: it is fair with respect to other (TCP) competing streams and it avoids generating bursty traffic. This paper presents the system architecture and an evaluation of our implementation in three different operating environments: a networking testbed in a laboratory environment, a home-user scenario (DSL line with 640Kbit/s), and a wide area network covering the Atlantic (server in Europe, client in the US). Moreover we examine the network-friendliness of the adaptation protocol and the relationship between the quality of the received continuous media and the protocol's aggressiveness. Our architecture is based on efficient MPEG System filtering to achieve high-quality video over best-effort network

Multi-layer virtual transport network management

Nowadays there is an increasing need for a general paradigm which can simplify network management and further enable network innovations. Software Defined Networking (SDN) is an efficient way to make the network programmable and reduce management complexity, however it is plagued with limitations inherited from the legacy Internet (TCP/IP) architecture. In this paper, in response to limitations of current Software Defined Networking (SDN) management solutions, we propose a recursive approach to enterprise network management, where network management is done through managing various Virtual Transport Networks (VTNs) over different scopes (i.e., regions of operation). Different from the traditional virtual network model which mainly focuses on routing/tunneling, our VTN provides communication service with explicit Quality-of-Service (QoS) support for applications via transport flows, and it involves all mechanisms (e.g., addressing, routing, error and flow control, resource allocation) needed to support such transport flows. Based on this approach, we design and implement a management architecture, which recurses the same VTN-based management mechanism for enterprise network management. Our experimental results show that our management architecture achieves better performance.National Science Foundation awards: CNS-0963974 and CNS-1346688

Hierarchical video surveillance architecture: a chassis for video big data analytics and exploration

There is increasing reliance on video surveillance systems for systematic derivation, analysis and interpretation of the data needed for predicting, planning, evaluating and implementing public safety. This is evident from the massive number of surveillance cameras deployed across public locations. For example, in July 2013, the British Security Industry Association (BSIA) reported that over 4 million CCTV cameras had been installed in Britain alone. The BSIA also reveal that only 1.5% of these are state owned. In this paper, we propose a framework that allows access to data from privately owned cameras, with the aim of increasing the efficiency and accuracy of public safety planning, security activities, and decision support systems that are based on video integrated surveillance systems. The accuracy of results obtained from government-owned public safety infrastructure would improve greatly if privately owned surveillance systems ‘expose’ relevant video-generated metadata events, such as triggered alerts and also permit query of a metadata repository. Subsequently, a police officer, for example, with an appropriate level of system permission can query unified video systems across a large geographical area such as a city or a country to predict the location of an interesting entity, such as a pedestrian or a vehicle. This becomes possible with our proposed novel hierarchical architecture, the Fused Video Surveillance Architecture (FVSA). At the high level, FVSA comprises of a hardware framework that is supported by a multi-layer abstraction software interface. It presents video surveillance systems as an adapted computational grid of intelligent services, which is integration-enabled to communicate with other compatible systems in the Internet of Things (IoT)