Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Error concealment"”.
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Error detection and error concealment for MPEG2 over communication networks
… for communication networks. During transmission errors may occur. For compressed video, that means degradation of the picture quality. Different error control strategies have been proposed to compensate for the problem of transmission errors. In this work we concentrate on combining Error …
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Combined forward error correction and error concealment for digital video transmission
Forward Error Correction (FEC) coding has been widely used in digital communications to improve the transmission performance over noisy channels. Based on the introduced redundancy and encoding structure, a maximum likelihood (ML) decoding scheme can be used to correct significant part of …
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Error Concealment for Robust Image and Video Transmissions on the Internet
Likewise, delay and packet loss are two primary concerns for image transmissions. Existing approaches for delivering single-description coded images by TCP give superior quality but very long delays when the network is unreliable. To reduce delays, we have proposed to use UDP to deliver …
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Error control for scalable image and video coding
… losses to scalable images and video, namely the error resilient method, the error concealment method, and the unequal error protection method within the joint source-channel coding framework. For the error resilient method, an optimal bit allocation algorithm is proposed without considering the …
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Image analysis using visual saliency with applications in hazmat sign detection and recognition
… various distances.^ In other work we investigate error concealment for scalable video coding (SVC). When video compressed with SVC is transmitted over loss-prone networks, the decompressed video can suffer severe visual degradation across multiple frames. In order to enhance the visual quality, we …
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Low Complexity Multiview Video Coding
… of the MVC encoder and by proposing a consistent error concealment technique for frame losses in 3D video transmission. The thesis first analyses the complexity of the MVC encoder. It then proposes two novel techniques to reduce the complexity of motion and disparity estimation. The first method …
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Error Resilient Video Coding Using Bitstream Syntax And Iterative Microscopy Image Segmentation
… making compressed bitstreams vulnerable to errors. We propose several adaptive spatial-temporal error concealment approaches for subsampling-based multiple description video coding. These adaptive methods are based on motion and mode information extracted from the H.26x video bitstreams. We …
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Robust and efficient video/image transmission
… demanding nowadays. Three aspects of this task, error burst correction, efficient rate allocation and random error protection are investigated in this dissertation. A novel technique, called successive packing, is proposed for combating multi-dimensional (M-D) bursts of errors. A new concept of …
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A Novel Approach for Implementing Worldwide Interoperability for Microwave Access for Video Surveillance
… Moreover, this thesis proposes post-decoding error concealment techniques as the last means to overcome packet loss. To evaluate the performances of the proposed methods, simulations are carried out using NS-2 simulator on Linux platform. The proposed methods are compared to existing works to …
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Multimedia data dissemination in opportunistic systems
… data parts in a composite ``backward'' loss concealment mechanism. So, the receiver asks first for the missing data from other nodes in the network in the form of request-response. Then, since the transmission is concerned with video content, video frame loss error concealment techniques are …