Search for dissertations about: "quality enhancement"

Showing result 1 - 5 of 126 swedish dissertations containing the words quality enhancement.

2. 1. On Enhancement and Quality Assessment of Audio and Video in Communication Systems

   Author : Andreas Rossholm; Blekinge Tekniska Högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; QoE; video quality assessment; video quality metric; multi-linear regression; artificial neural network; support vector machine; quality predictor; machine learning; temporal scaling; spatial scaling; video compression; deblocking filter; noise cancelling; synchronization; audio delay; video delay; GSM interference signal; noise cancellation; notch filtering;

   Abstract : 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. READ MORE

4. 2. Methods for Objective and Subjective Video Quality Assessment and for Speech Enhancement

   Author : Muhammad Shahid; Blekinge Tekniska Högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Video Quality Assessment; No-Reference Methods; Reduced-Reference Methods; Subjective Experiments; Speech Enhancement; Adaptive Gain Equalizer;

   Abstract : 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. READ MORE

5. 3. Quality in e-learning within a cultural context : The case of Iran

   Author : Davoud Masoumi; Sweden University of Gothenburg Department of education; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Quality; e-learning; culture;

   Abstract : Higher education institutions in general and virtual institutions in particular are experiencing pressure to become more competitive all over the world. Such striving for excellence can be associated with and seen as a consequence of globalization that is propelling the reshaping of higher education. READ MORE

6. 4. On the Enhancement of Audio and Video in Mobile Equipment

   Author : Andreas Rossholm; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Audio enhancement; video enhancement; active noise cancellation; video coding; mobile equipment;

   Abstract : Use of mobile equipment has increased exponentially over the last decade. As use becomes more widespread so too does the demand for new functionalities. The limited memory and computational power of many mobile devices has proven to be a challenge resulting in many innovative solutions and a number of new standards. READ MORE

7. 5. Improving fingerprint biometrics by local symmetry and fusion

   Author : Hartwig Fronthaler; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alignment; Matching; Minutiae Extraction; Image Restoration; Multi-expert Fusion; Biometrics; Symmetry Features; Structure Tensor; Quality Assessment; Fingerprint Recognition; Image Pyramid; Enhancement; Rotational Symmetry; Cascaded Fusion; Monomodal Fusion; Fingerprint;

   Abstract : Fingerprint recognition and biometrics in general have been significantly gaining attention within the last years, not least due to the biometric passport that has been introduced all over Europe and the American immigration management system US-VISIT. The tasks of fingerprint recognition can be broken down to smaller entities, i.e. READ MORE