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 20 of 27 for “"H.264/AVC"”.
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Complexity management of H.264/AVC video compression.
The H. 264/AVC video coding standard offers significantly improved compression efficiency and flexibility compared to previous standards. However, the high computational complexity of H. 264/AVC is a problem for codecs running on low-power hand held devices and general purpose computers. This …
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Fast implementation of integer transforms in H.264/AVC video encoders
… and Hadamard transforms are adopted in the H.264/AVC standard encoder for the compression of residual video signals. Other video standards such as the H.261, H.262 and H.263 use Discrete Cosine Transform (DCT).
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Parallel algorithms and architectures for low power video decoding
… current state-of-the-art video coding standard H.264/AVC. Parallel architectures are used along with voltage scaling to deliver high definition (HD) decoding at low power levels. Additional architectural optimizations such as reducing memory accesses and multiple frequency/voltage domains are also …
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Error relilient video communications using high level M-QAM. Modelling and simulation of a comparative analysis of a dual-priority M-QAM transmission system for H.264/AVC video applications over band-limited and error-phone channels.
… An implementation is described in which H.264 video is protected unequally by partitioning the compressed data into two layers of different visual importance. The partition scheme is based on a separation of the group of pictures (GoP) in the intra-coded frame (I-frame) and predictive coded …
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Performance analysis of H.264 encoder for high-definition video transmission over ultra-wideband communication link.
… of pictures, and quantization parameter of an H.264/AVC encoder. Here, standard HD video streams with different motion characteristics are used, and the impact of these parameters change on the reconstructed video quality and the broadcasting data rate are analyzed. Finally, a generalized …
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Circuit implementations for high-efficiency video coding tools
… standard to the popular Advanced Video Coding (H.264/AVC) with a targeted 2x improvement in compression at the same quality. This improvement comes at the cost of increased complexity through the addition of new coding tools and increased computation in existing tools. The ever-increasing demand …
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Description-driven Adaptation of Media Resources
… of multi-layered temporal scalability in H.264/AVC, paying particular attention to the use of sub-sequences and hierarchical coding patterns, as well as to the use of metadata messages to communicate the bit stream structure to the adaptation logic. BFlavor was the only tool to offer an …
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Detection and representation of moving objects for video surveillance
… according to a recent video coding standard (H.264/AVC). As such, only the compressed features are analyzed to find moving objects. The latter technique results in a very fast and accurate detection (up to 20 times faster than the related work). Lastly, we investigated how different XML-based …
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Computational Complexity Optimization on H.264 Scalable/Multiview Video Coding
The H.264/MPEG-4 Advanced Video Coding (AVC) standard is a high efficiency and flexible video coding standard compared to previous standards. The high efficiency is achieved by utilizing a comprehensive full search motion estimation method. Although the H.264 standard improves the visual quality at …
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Analysis of one-dimensional transforms in coding motion compensation prediction residuals for video applications
… We perform experiments using a modified H.264/AVC codec to compare the performance of using different sets of available transforms. The results indicate that for typical applications of video coding, most of the performance benefit from using directional 1D-DCTs can be retained by keeping …
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A Cost Shared Quantization Algorithm and its Implementation for Multi-Standard Video CODECS
… Video Coding (HEVC). HEVC, successor to H.264/MPEG-4 AVC, aims to substantially improve coding efficiency compared to AVC High Profile. The thesis presents a high performance circuit shared architecture that can perform the quantization operation for HEVC, H.264/AVC, AVS, VC-1, MPEG- 2/4 …
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Low-power techniques for video decoding
The H.264 video coding standard can deliver high compression efficiency at a cost of large complexity and power. The increasing popularity of video capture and playback on portable devices requires that the energy of the video processing be kept to a minimum. This work implements several …
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Μελέτη μεθόδων ασφαλούς μετάδοσης πολυμέσων σε σύγχρονα ασυρματικά δίκτυα
… Μελετήθηκε το πρότυπο κωδικοποίησης MPEG-4 και H.264/AVC, ώστε να αναλυθεί η αλλοίωση της αντιλαμβανόμενης ποιότητας του ϐίντεο κατά την μεταγωγή της υπηρεσίας μεταξύ ετερογενών ασύρματων δικτύων και να προταθούν ϐέλτιστοι αλγόριθμοι προγραμματισμού της μετάδοσης πακέτων σε ασύρματα All-IP δίκτυα. …
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