The MPEG-7 standard provides description mechanisms and taxonomy management for multimedia documents. There are several approaches to design a multimedia database system using MPEG-7 descriptors. We discuss two of them: relational databases and native XML databases. We have implemented a search and retrieval application for MPEG-7 descriptions based on the latter.

The ongoing MPEG-7 standard intends to provide a “Multimedia Content Description Interface.” In other words, it will provide a rich set of tools to describe content with a view to facilitating applications such as content based querying, browsing and searching of multimedia content. The MPEG-4 standard provides tools for compressing multimedia content at bitrates that are feasible with typical ...

Introduction MiR-135a is found to selectively induce apoptosis in glioma cell but not in normal neurons and glial cells. However, low transfection efficacy limits its application in vivo as other miRNAs. We prepared a new kind of nano-vector based on polyethylene glycol methyl ether (mPEG) and hyper-branched polyethylenimine (hy-PEI) in order to improve the miRNA delivery system into the glioma...

A novel type of pH-responsive biodegradable copolymer was developed based on methyloxy-poly(ethylene glycol)-block-poly[dopamine-2-(dibutylamino) ethylamine-l-glutamate] (mPEG-b-P(DPA-DE)LG) and applied to act as an intelligent nanocarrier system for magnetic resonance imaging (MRI). The mPEG-b-P(DPA-DE)LG copolymer was synthesized by a typical ring opening polymerization of N-carboxyanhydrides...

termarking of MPEG-1 and MPEG-2 compressed pplied directly in the domain of MPEG-1 system multiplexed streams). Perceptual models are used avoid degradation of the video quality. The waterginal video sequence. A modified correlation-based ear preprocessing before correlation. Experimental d scheme is able to withstand several common atis very fast and therefore, suitable for copyright

In this paper we exploit the possibilities offered by MPEG-4, through XMT-A and XMT-O, by implementing an Impress extension that translates an electronic presentation to XMT-O, so to be finally compiled for MPEG-4 conversion. We have implemented this conversion tool and in this paper we describe our implementation and analyze its results. Key-Words: Data Compression, MPEG, Impress.

Content-based management of three-dimensional data in the framework of the MPEG-7 standard is considered. An overview on MPEG-7 and three-dimensional data is presented. Descriptors and description schemes suitable for three-dimensional data are introduced and their integration in the framework of MPEG-7 is detailed. The shape descriptors are based on cords, wavelet transform and three-dimension...

Multimedia streaming is becoming increasingly popular. The multimedia standard MPEG-4 was designed to support scenes of different levels of complexity and applications with low bandwidth up to very high bandwidth requirements. Scalable video encoding is supported as well. This allows MPEG-4 streaming software to adapt video quality dynamically in the network to currently given QoS conditions. W...

Decoding MPEG-2 video streams imposes hard realtime constraints for consumer devices such as TV sets. The freedom of encoding choices provided by the MPEG-2 standard results in high variability inside streams, in particular with respect to frame structures and their sizes. In this paper, we identify realistic timing constraints demanded by MPEG-2 video decoding. We present results from a study ...

HDTV 60 million households will have at least one wide screen, High-Definition TV display in their home by the end of 2007, according to In-Stat predictions. The ability to produce broadcast quality compressed video in realtime makes 3ivx MPEG-4 5.0 uniquely suited for HDTV production environments. 3ivx produces high quality HD MPEG-4 Video with 5.1 Surround Sound MPEG-4 AAC Audio in less than ...