Sökning: "video quality assessment"
Visar resultat 1 - 5 av 40 avhandlingar innehållade orden video quality assessment.
1. On Enhancement and Quality Assessment of Audio and Video in Communication Systems
Sammanfattning : The use of audio and video communication has increased exponentially over the last decade and has gone from speech over GSM to HD resolution video conference between continents on mobile devices. As the use becomes more widespread the interest in delivering high quality media increases even on devices with limited resources. LÄS MER
2. Samtal om skrivbedömning : Lärares normer, beslut och samstämmighet
Sammanfattning : This thesis reports and discusses results from a qualitative study of Swedish teachers' writing assessment in upper secondary school. Based on teacher group discussions, the study investigates teachers' interactions, expressions of norms and decisions when assessing and grading students' writing in the subject of Swedish. LÄS MER
3. Methods for Objective and Subjective Video Quality Assessment and for Speech Enhancement
Sammanfattning : The overwhelming trend of the usage of multimedia services has raised the consumers' awareness about quality. Both service providers and consumers are interested in the delivered level of perceptual quality. The perceptual quality of an original video signal can get degraded due to compression and due to its transmission over a lossy network. LÄS MER
4. Grupparbetsbedömning på individnivå : Gymnasielärares möjligheter och utmaningar
Sammanfattning : Avhandlingens syfte är att öka kunskapen om och förståelsen av gymnasielärares möjligheter och utmaningar med att genomföra grupparbetsbedömning på individnivå av elevers kunskaper och förmågor utvecklade i samarbete. Fokus är på om och i så fall hur lärares perspektiv förändras i samband med genomförandet av en grupparbetsuppgift i klassrummet som inkluderar lärares grupparbetsbedömning på individnivå. LÄS MER
5. Towards Optimal Quality of Experience via Scalable Video Coding
Sammanfattning : To provide universal multimedia experience, multimedia streaming services need to transparently handle the variation and heterogeneity in operating environment. From the standpoint of streaming application, video adaptation techniques are intended to cope with the environmental variations by utilizing manipulations of the video content itself. LÄS MER