To maximize end user satisfaction, Wireless multimedia application needs the communication networks to allocate resources dynamically. Cross layer framework design offers a solution to this problem. In this paper, a cross layer framework design strategy optimizes the application, physical and MAC layers jointly for video streaming. An efficient FEC mechanism to combat channel errors is chosen b...

This paper shows how the adoption of a Dynamic Rate Shaping (DRS) to variable bit rate (VBR) MPEG-2 (Motion Pictures Expert Group-2) coded video data, in addition to different levels of data protection, adds more flexibility in the way a video data stream can be sent over a faded satellite channel. DRS allows the satellite bandwidth required to be continuously trimmed, within a certain range. A...

We consider the problem of allocating bits among pictures in an MPEG video coder to equalize the visual quality of the coded pictures, while meeting bu er and channel constraints imposed by the MPEG Video Bu ering Veri er. We address this problem within a framework that consists of three components: 1) a bit production model for the input pictures, 2) a set of bit-rate constraints imposed by th...

Recent advances in computing, communication, and data storage have led to an increasing number of large digital libraries publicly available on the Internet. Main problem of content-based video retrieval is inferring semantics from raw video data. Video data play an important role in these libraries. Instead of words, a video retrieval system deals with collections of video records. Therefore, ...

Effective usage of multimedia digital libraries has to deal with the problem of building efficient content annotation and retrieval tools. In particular in video domain, different techniques for manual and automatic annotation and retrieval have been proposed. Despite the existence of well-defined and extensive standards for video content description, such as MPEG-7, these languages are not exp...

Annotation of video content has been commonplace in the entertainment industry for many years and is now becoming a valuable tool within the business world. Unfortunately its use in education has to date been limited. Although research and development is being undertaken to apply video annotation techniques to assessment and both software and hardware exists to facilitate this process, it must ...

Sector Based Scanning and Adaptive Active Tracking of Multiple Objects. TIIS 5(6 ): 1166-1191 (2011). [j6]. .. Yunyoung Nam, Eenjun Hwang: XVIDEO: XMLbased Video Annotation and Retrieval. XVIDEO: XML-based Video Annotation and Retrieval. 01/2002. 282 Reads. Formation and behavior of Kirkendall voids . Most content-based indexing and retrieval systems work on a query by image. XML-based file for...

Video annotation is a process of describing or elaborating on objects or events represented in video. Part of this process involves time consuming manual interactions to define spatio-temporal entities such as a region of interest within the video. This dissertation proposes a pursuit method for video annotation to quickly define a particular type of spatio-temporal entity known as a pointbased...

Various research projects already followed up the design of video annotation applications. Nevertheless, collaborative application scenarios as well as the needs of users regarding the annotation workflow have been taken little into account. This paper discusses requirements for the design of video annotation systems. As our main contribution, we consider aspects that can be associated with col...