Objective assessment of region of interest-aware adaptive multimedia streaming quality

Adaptive multimedia streaming relies on controlled adjustment of content bitrate and consequent video quality variation in order to meet the bandwidth constraints of the communication link used for content delivery to the end-user. The values of the easy to measure network-related Quality of Service metrics have no direct relationship with the way moving images are perceived by the human viewer. Consequently variations in the video stream bitrate are not clearly linked to similar variation in the user perceived quality. This is especially true if some human visual system-based adaptation techniques are employed. As research has shown, there are certain image regions in each frame of a video sequence on which the users are more interested than in the others. This paper presents the Region of Interest-based Adaptive Scheme (ROIAS) which adjusts differently the regions within each frame of the streamed multimedia content based on the user interest in them. ROIAS is presented and discussed in terms of the adjustment algorithms employed and their impact on the human perceived video quality. Comparisons with existing approaches, including a constant quality adaptation scheme across the whole frame area, are performed employing two objective metrics which estimate user perceived video quality

Reviews

Integrating Information Technology into Education edited by Deryn Watson and David Tinsley, London, Chapman & Hall, 1995, ISBN: 0–412–62250–5, 316 pages

Digital Image Access & Retrieval

The 33th Annual Clinic on Library Applications of Data Processing, held at the University of Illinois at Urbana-Champaign in March of 1996, addressed the theme of "Digital Image Access & Retrieval." The papers from this conference cover a wide range of topics concerning digital imaging technology for visual resource collections. Papers covered three general areas: (1) systems, planning, and implementation; (2) automatic and semi-automatic indexing; and (3) preservation with the bulk of the conference focusing on indexing and retrieval.published or submitted for publicatio

Guidelines for data collection and monitoring for asset management of New Zealand road bridges

Publisher PD

Advanced solutions for quality-oriented multimedia broadcasting

Multimedia content is increasingly being delivered via different types of networks to viewers in a variety of locations and contexts using a variety of devices. The ubiquitous nature of multimedia services comes at a cost, however. The successful delivery of multimedia services will require overcoming numerous technological challenges many of which have a direct effect on the quality of the multimedia experience. For example, due to dynamically changing requirements and networking conditions, the delivery of multimedia content has traditionally adopted a best effort approach. However, this approach has often led to the end-user perceived quality of multimedia-based services being negatively affected. Yet the quality of multimedia content is a vital issue for the continued acceptance and proliferation of these services. Indeed, end-users are becoming increasingly quality-aware in their expectations of multimedia experience and demand an ever-widening spectrum of rich multimedia-based services. As a consequence, there is a continuous and extensive research effort, by both industry and academia, to find solutions for improving the quality of multimedia content delivered to the users; as well, international standards bodies, such as the International Telecommunication Union (ITU), are renewing their effort on the standardization of multimedia technologies. There are very different directions in which research has attempted to find solutions in order to improve the quality of the rich media content delivered over various network types. It is in this context that this special issue on broadcast multimedia quality of the IEEE Transactions on Broadcasting illustrates some of these avenues and presents some of the most significant research results obtained by various teams of researchers from many countries. This special issue provides an example, albeit inevitably limited, of the richness and breath of the current research on multimedia broadcasting services. The research i- - ssues addressed in this special issue include, among others, factors that influence user perceived quality, encoding-related quality assessment and control, transmission and coverage-based solutions and objective quality measurements

The Professional Artist as Public School Educator: A Research Report of the Chicago Arts Partnerships in Education

Over the past eight years, the Chicago Arts Partnerships in Education (CAPE) has undergone an extensive regimen of program research and evaluation, utilizing both staff members and external consultants to collect, analyze, and interpret information on program effectiveness. This information has been used to shape and strengthen the partnership program each year in response to the needs of students, teachers and teaching artists as well as to changing political and cultural pressures within the Chicago Public School System. In addition,the documentation and publication of insights and lessons learned through arts integration experiences in the schools has contributed significantly to the wider body of research in the field of arts education.During the early years of the program, evaluation efforts focused on general descriptions of the program goals and objectives along with initial impacts on student life.Positive trends were identified in terms of administrative and faculty attitudes and increased involvement in thearts partnerships, due mainly to student interest. More recently, a closer, more detailed analysis of CAPE's growing influence on student learning, teaching practice and school climate has highlighted the value of quality, arts integrated instruction, including evidence of positive effects on standardized math and reading test scores.Last year, our research turned to program sustainability, partly in light of reduced funding, as well as to the assimilation of new partnership schools and an increasing organizational focus on the professional development of participating teachers and artists. In the vast majority of cases, CAPE partnerships have evolved through trials and successes to bring lasting effects on administrators, teachers, and students.Through these studies, it is increasingly apparent that the participation of well-trained teaching artists is a valuable, and in some cases vital, addition to the general education of youth. The presence and artistic know-how brought to the classroom by these talented, dedicated professionals can, and is, having notable, sustainable influence on whole school improvement through transforming the daily learning experiences of educators and students alike. Not only does the presence of a quality arts program enliven a school atmosphere and promote the advancement of artistic skills and aesthetic knowledge, but a closer look at rigorous arts integrated activities in the classroom is revealing important insights into the cognitive benefits of arts education. Not only can artfully constructed lessons that authentically bridge the arts and academic content domains assist in the acquisition of artistic understanding, but they can enhance learning across the academic curriculum and, perhaps more importantly, the underlying thinking curriculu

Developing the Intervention and Outcome Components of a Proposed Randomised Controlled trial (RCT) of a National Screening Programme for Open Angle Glaucoma (OAG) : Medical Research Council funded trial platform study (G0701759): Study protocol

Postprin