Sökning: "video compression"

Visar resultat 1 - 5 av 23 avhandlingar innehållade orden video compression.

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

    Detta är en avhandling från Karlskrona : Blekinge Institute of Technology

    Författare :Andreas Rossholm; Blekinge Tekniska Högskola.; [2014]
    Nyckelord :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;

    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. 2. Very Low Bitrate Video Communication A Principal Component Analysis Approach

    Detta är en avhandling från Umeå : Tillämpad fysik och elektronik

    Författare :Ulrik Söderström; Umeå universitet.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Video compression; Very low bitrate; Principal component analysis; Complexity; Semantically important areas; Wearable video; TECHNOLOGY Electrical engineering; electronics and photonics Other electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Övrig elektroteknik; elektronik och fotonik;

    Sammanfattning : A large amount of the information in conversations come from non-verbal cues such as facial expressions and body gesture. These cues are lost when we don't communicate face-to-face. But face-to-face communication doesn't have to happen in person. With video communication we can at least deliver information about the facial mimic and some gestures. LÄS MER

  3. 3. Wireless video sensor network and its applications in digital zoo

    Detta är en avhandling från Umeå : Umeå universitet, Institutionen för tillämpad fysik och elektronik

    Författare :Johannes Karlsson; Umeå universitet.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wireless Sensor Networks; Wireless ad-hoc Networks; Digital Zoo; Video Compression; Real-Time Video Communication; Object Tracking; Sensor Fusion; TECHNOLOGY Electrical engineering; electronics and photonics Other electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Övrig elektroteknik; elektronik och fotonik; signalbehandling; Signal Processing;

    Sammanfattning : Most computing and communicating devices have been personal computers that were connected to Internet through a fixed network connection. It is believed that future communication devices will not be of this type. Instead the intelligence and communication capability will move into various objects that surround us. LÄS MER

  4. 4. Off-line Foveated Compression and Scene Perception: An Eye-Tracking Approach

    Detta är en avhandling från Department of Electrical and Information Technology, Lund University

    Författare :Marcus Nyström; Lunds universitet.; Lund University.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gaze prediction; off-line foveation; scene perception; eye-tracking; compression;

    Sammanfattning : With the continued growth of digital services offering storage and communication of pictorial information, the need to efficiently represent this information has become increasingly important, both from an information theoretic and a perceptual point of view. There has been a recent interest to design systems for efficient representation and compression of image and video data that take the features of the human visual system into account. LÄS MER

  5. 5. Video Signal Processing: Compression Segmentation and Tracking

    Detta är en avhandling från Department of Electrical and Information Technology, Lund University

    Författare :Andrew Backhouse; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis considers three separate research problems within the field of video processing.The first is concerned with segmenting an image, the second with tracking an object and the third with the communication of video across an unreliable network.Segmentation is an application-specific problem. LÄS MER