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In the modern world, communication between people is being more important than ever, people are seeking for a more vivid, real-time way of communication. WebRTC (Web Real-Time Communication) is an upcoming technology that enables real-time communications capabilities in audio, video and data transmission via web browsers through Javascript APIs (Application Programming Interfaces). In this paper,...
The need for the reduction of energy consumption and size of microelectronic circuits is increasingly in demand. To support this request, this paper presents a comparison study on two integrated technologies: FDSOI 28nm and CMOS 350nm. The aim of this work was to compare the performance of these two technologies for the design of a rectifier and a Dickson charge pump for rectenna application. The...
Streaming media applications generate a sizable part of network traffic and represent a significant proportion of network providers' income. The commitment to user satisfaction can be summarized by different concepts, content providers emphasizing quality of experience (QoE), whereas network providers are more focused on quality of service (QoS). Measuring QoS parameters, and understanding the relationship...
This paper describes an adaptive time-to-live (TTL) allocation scheme based on dynamic caching of content delivery network (CDN). This is advantageous in that when a client watches a real-time private broadcast, the load of the origin server can be efficiently reduced when a certain scene from the past is viewed again, and a storage space of a cache server can be efficiently used. Therefore, the adaptive...
This paper proposes a general framework that allows to identify a video in real time using perceptual image hashing algorithms. In order to evaluate the versatility and performance of the framework, it was coupled for a use case about ads tv monitoring. Four Perceptual Image Hashing (PIH) algorithms were subject to a benchmarking process in order to identify the best one for the use case. This process...
Microservices deployment of Rich Internet Applications is not a new research topic; many articles have been published and related innovative technologies released in the last years. Thus, the research work presented in this article is focused on surveying the current collaborative learning concepts and technologies and proposing a new virtual classware approach, implemented and deployed as a set of...
Most of the recent set-top boxes for digital video broadcasting connect to the Internet. They can receive data from broadcasting systems and from the Internet. Such hybrid broadcasting environments, in which clients can receive data from both broadcasting systems and communications systems, are suitable for streaming delivery since they complement their demerits for streaming delivery with each other...
Network "softwarization" is gaining increasing popularity to achieve dynamicity and flexibility. Cloud computing, together with the new paradigms of SDN and NFV are supporting this evolution. However, the need to move services closer to users to guarantee low latency in the service fruition on one hand, and the trend to support personalization of services on the other hand, are stimulating...
Throughput starvation, which occurred under well-known exposed/hidden terminal problem in CSMA/CA based channel access mechanisms, will be a critical problem for future wireless LAN systems. This paper describes new schemes that identify starved access points (APs) and user equipments (UEs). One scheme identifies starved APs by observing the delay of beacon signals periodically transmitted by APs...
In this paper, we design an audience-aware signage sensing and interacting system, called Cyber-Physical Ad (CPAd), for individuals using smartphones based on Internet of Things technologies. In the CPAd system, a digital signage can sense surrounding audiences via built-in sensors and the signage content can be adaptive to interact with nearby audiences through real-time multimedia contents. In addition,...
In this work, a group handoff scheme from a mobile AP to a fixed AP and vice versa for downloading and sharing of group touring's Points of Interests (POIs) based on the concept of proximity service were proposed. In a group touring scenario, the tour guide enables the Wi Fi hot spot service of his own handheld device, which plays the role of mobile proxy and mobile AP (m-AP), and each tourist has...
Converting audio signal to packet stream and propagating through wireless local area network (Wi-Fi technology) to loud speakers that may be located at different rooms will be a popular scenario of multimedia applications. Since the packets received by separate speakers varied with the transmission paths and environment to them, this made the playable contents different from one speaker to another...
The recent development of stream delivery technology made Internet broadcasting services popular. In live Internet broadcasting, broadcasters or viewers often add video or sound effects (we call this kind of live broadcasting, ‘different worlds broadcasting’). Therefore, we have proposed a distributed Internet live broadcasting system with video and audio effects. In this paper, we describe the implementation...
The performance of GPUs on mobile devices is generally the bottleneck of multimedia mobile applications (e.g., 3D games and virtual reality). Previous attempts to tackle the issue mainly migrate GPU computation to servers residing in remote cloud centers. However, the costly network delay is especially undesirable for highly-interactive multimedia applications since a fast response time is critical...
The reTHINK project has the ambition to help Telecom operators to leverage their own strengths by coupling them with the WebRTC principles and its own original and innovative concepts. It describes a framework that provides a set of solutions to manage global real time communication services through the execution in the browser of a dedicated runtime environment. We propose to technically extend the...
The replication and dissemination of multimedia data become increasingly convenient and efficient, so a lot of redundant multimedia data, especially image files, have been generated and stored on the Internet. Therefore, it is necessary to perform deduplication of images. However, the existing deduplication methods of regular files are hash-based, which cannot be applied to the deduplication of images...
Periodic broadcasting is the most efficient strategy to distribute popular video streams. In the past decade, many periodic broadcasting schemes were presented to reduce client's buffer usage and client's waiting time. After that, people focused on the problem of heterogeneous receiving. A recently proposed broadcasting scheme named Delay Receiving (DeRe) solves this problem by ensuring low waiting...
Internet Protocol Television (IPTV) has become widely used to deliver TV channels over the Internet. Tremendous efforts have been carried out for making IPTV services an alternative to traditional TV by offering low-cost TV channels. The cloud network offers many advantages that give more flexibility for sharing the content and reducing the cost for endusers. In this paper, we explore the strength...
The Hyper-linked communications concept applies much of the hypermedia concepts, widely used on Web content, to the communications realm. This paradigm allows to synchronize, structure and navigate communication content integrated into voice and video calls. Voice and image together can express emotions like no other medium can. With hypermedia concepts, we can add even more value to conference calls...
With the increasing popularity of multimedia-rich web portals, reducing latency has become more and more important. The current median web page load time is in the order of seconds, while research has shown that user waiting times must remain below two seconds to achieve optimal acceptance. In this paper, we analyzed a large dataset obtained from a major Belgian news provider, focusing on content...
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