A novel method for subjective picture quality assessment and further studies of HDTV formats

This is the author's accepted manuscript. The final published article is available from the link below. Copyright @ IEEE 2008.This paper proposes a novel method for the assessment of picture quality, called triple stimulus continuous evaluation scale (TSCES), to allow the direct comparison of different HDTV formats. The method uses an upper picture quality anchor and a lower picture quality anchor with defined impairments. The HDTV format under test is evaluated in a subjective comparison with the upper and lower anchors. The method utilizes three displays in a particular vertical arrangement. In an initial series of tests with the novel method, the HDTV formats 1080p/50,1080i/25, and 720p/50 were compared at various bit-rates and with seven different content types on three identical 1920 times 1080 pixel displays. It was found that the new method provided stable and consistent results. The method was tested with 1080p/50,1080i/25, and 720p/50 HDTV images that had been coded with H.264/AVC High profile. The result of the assessment was that the progressive HDTV formats found higher appreciation by the assessors than the interlaced HDTV format. A system chain proposal is given for future media production and delivery to take advantage of this outcome. Recommendations for future research conclude the paper

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

Helping behaviour during cooperative learning and learning gains

Is helping behaviour (i.e., solicited help and peer tutoring) during cooperative learning (CL) related to subsequent learning gains? And can teachers influence pupils’ helping behaviour? One hundred one 5th grade pupils from multiethnic schools, 10-12 years old, participated in the study. Forty two pupils (31 immigrant) worked in an experimental condition, characterized by the stimulation of solicited high quality help and 59 (24 immigrant) worked in a control condition. It was found that learning gains were predicted positively by pupils’ unsolicited helping behaviour (i.e., peer tutoring) and negatively by solicited help. Furthermore, teachers were able to affect pupils’ low quality solicited help only. Lastly, immigrant pupils used less helping behaviour than local pupils, irrespective of CL setting

Small businesses in the new creative industries:innovation as a people management challenge

Purpose - This paper presents findings from an SME case study situated in the computer games industry, the youngest and fastest growing of the new digital industries. The study examines changing people management practices as the case company undergoes industry-typical strategic change to embark on explorative innovation and argues that maintaining an organisational context conducive to innovatin over time risks turning into a contest between management and employees as both parties interpret organisational pressures from their different perspectives. Design/methodology/approach - A single case study design is used as the appropriate methdology to generate indepth qualitative data from multiple organisational member perspectives. Findings - Findings indicate that management and worker perspectives on innovation as strategic change and the central people management practices required to support this differ significantly, resulting in tensions and organisational strain. As the company moves to the production of IP work, the need for more effective duality management arises. Research limitations/implications - The single case study has limitations in terms of generalisability. Multiple data collection and triangulation were used to migitate against the limitations. Practical implications - The study highlights the importance of building up change management capability in the small businesses typical for this sector, an as yet neglected focus in the academic iterature concerned with the industry and in support initatives. Originality/value - Few qualitative studies have examined people management practices in the industry in the context of organisational/strategic change, and few have adopted a process perspective