The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
3-Dimensional (3D) video adaptation decision taking is an open field in which not many researchers have carried out investigations yet compared to 3D video display, coding, etc. Moreover, utilizing ambient illumination as an environmental context for 3D video adaptation decision taking has particularly not been studied in literature to date. In this paper, a user perception model, which is based on...
Context-aware applications are fast becoming popular as a means of enriching users' experiences in various multimedia content access and delivery scenarios. Nevertheless, the definition, identification, and representation of contextual information are still open issues that need to be addressed. In this paper, we briefly present our work developed within the VISNET II Network of Excellence (NoE) project...
This paper presents a standards-based architecture for a complex and generic distributed multimedia scenario, which combines content search and retrieval, DRM, and context-based content adaptation together. The most innovative part of the proposed work comes from the integration of a flexible language for multimedia search based on MPEG query format (MPQF) standard with the application of video analysis...
The explosion of interest in consuming rich multimedia content resulted in a growing demand for technologies that enable seamless access over any network using any terminal without affecting the viewing experience. Scalable Video Coding (SVC) is considered to be one of the key technologies that will improve the accessibility to video resources through adapting them at network nodes or destination...
Constraints on the storage, transmission and consumption deter seamless access to massive supply of multimedia contents readily available for consumers. Consequently, universal multimedia access (UMA) still remains a challenging objective. Context based digital item adaptation (DIA) is seen as a key technology to realise UMA. Scalability options in modern video coding standards provide inherent support...
Virtual collaboration concept allows remotely located partners to meet in a virtual environment using the state of the art communication and digital multimedia technologies. A virtual collaboration system is being developed under VISNET II network of excellence of the IST FP6 programme. This paper elaborates on a virtual collaboration scenario and proposes content adaptation technologies to fulfil...
Distributed video coding (DVC) is one of the fastest growing coding techniques in the current signal processing world. It has its outstanding low complex encoder which is essential for some applications in the consumer market. Driven by the above motive, in this paper we propose a novel side information refinement technique for Wyner-Ziv video frames in DVC. When a bit plane is decoded, it is used...
In this paper, we propose a novel concept for key frame encoding in distributed video codecs (DVC) without using any additional coding scheme. The proposed concept is an extension of Wyner-Ziv coding for key frame coding. Since key frames are used in the prediction purposes, the quality of them is critical in the DVC codecs. Therefore we use a fine quantizer (high quality) to encode these key frames...
Owing to the provision of a more natural and realistic reconstruction of a scene in the form of two views presented to the left and right eyes, stereoscopic imaging/video technology offers a more attractive and effective solution for imaging/video production. However due to the fact that more information has to be transmitted to reproduce the stereoscopic image pair, the transmission bit rate might...
Due to the provision of a more natural representation of a scene in the form of left and right eye views, a stereoscopic imaging system provides a more effective method for image/video display. Unfortunately the vast amount of information that needs to be transmitted/stored to represent a stereo image pair/video sequence, has so far hindered its use in commercial applications. However, by properly...
In this paper, we propose a new motion estimation algorithm based on evolutionary strategy (ES) for the H.264 video codec applied to monoscopic video. The proposed technique applies in macroblock basis and performs a parallel local search for the motion vector associated with the minimum motion compensated residue. For this purpose (mu+lambda)-ES is used with heuristically and randomly generated population...
Stereoscopic video coding research has received considerable interest over the past decade as many 3D displays have been developed. Unfortunately, the vast amount of multimedia content needed to transmit or store a stereo image pair or video sequence has hindered its use in commercial applications. As H.264 offers significantly enhanced compression and a "network-friendly" feature, we have...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.