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Dissertations / Theses on the topic 'Macroblock'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Demirtas, Ali Murat. "Error Resilient Coding Using Flexible Macroblock Ordering In Wired And Wireless Communications." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609860/index.pdf.

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Error Resilient Coding tools are the methods to avoid or reduce the amount of corruption in video by altering the encoding algorithm. One of them is Flexible Macroblock Ordering (FMO) which provides us with ordering macroblocks of the frames flexibly. Six of them have definite ordering pattern and the last one, called explicit type, can get any order. In this thesis two explicit type algorithms, one of which is new, are explained and the performance of different FMO types in wired and wireless communication are evaluated. The first algorithm separates the important blocks into separate packet

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Zhang, Jian Electrical Engineering Australian Defence Force Academy UNSW. "Error resilience for video coding services over packet-based networks." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Electrical Engineering, 1999. http://handle.unsw.edu.au/1959.4/38652.

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Error resilience is an important issue when coded video data is transmitted over wired and wireless networks. Errors can be introduced by network congestion, mis-routing and channel noise. These transmission errors can result in bit errors being introduced into the transmitted data or packets of data being completely lost. Consequently, the quality of the decoded video is degraded significantly. This thesis describes new techniques for minimising this degradation. To verify video error resilience tools, it is first necessary to consider the methods used to carry out experimental measurements.

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Ferreira, Renan Utida. "Codificador H.264/AVC com compensação de movimento baseada em partições alternativas de macrobloco." reponame:Repositório Institucional da UnB, 2009. http://repositorio.unb.br/handle/10482/4142.

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Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2009.<br>Submitted by Allan Wanick Motta (allan_wanick@hotmail.com) on 2010-04-08T14:13:17Z No. of bitstreams: 1 2009_RenanUtidaFerreira.pdf: 1870886 bytes, checksum: 470ef730e0d602a7361b89942f208e20 (MD5)<br>Approved for entry into archive by Lucila Saraiva(lucilasaraiva1@gmail.com) on 2010-04-09T21:59:14Z (GMT) No. of bitstreams: 1 2009_RenanUtidaFerreira.pdf: 1870886 bytes, checksum: 470ef730e0d602a7361b89942f208e20 (MD5)<br>Made available in DSpace on 2010-04-09T21:59:14Z (GMT

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Bednarz, Robin. "Analýza kvality obrazu v digitálních televizních systémech." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217810.

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Diploma thesis deals with the analysis of quality in digital television systems and contains theoretical description of subjective and objective assessment of quality picture methods. The thesis contains short-term and long-term analysis of quality picture of terrestrial television DVB-T. Measurements and experimentations were carried out with the help of Rohde&Schwarz DVQ analyzer of picture quality and software MPEG-2 Quality Monitor and MPEG-2 Elementary stream analyzer.

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5

Hsu, Ming-chien, and 徐銘鍵. "Macroblock-Layer Rate Control Using Nonlinear Regression." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/56865383708162939447.

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碩士<br>義守大學<br>資訊管理學系碩士班<br>97<br>The goal of rate control is mainly to make bits stream of videos match the bandwidth of the transmission or the size of storage space; meanwhile, reconstructed image quality is also considered by rate control. For achieving above goals, many rate-control schemes based on the rate-distortion (R-D) model have been developed. But these techniques include more complicated calculations. A new rate-control scheme using dynamic table can reduce the computation complexity by table look-up. The table establishes a corresponding relation for rate and distortion under a v

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6

Kung, Yi-wei, and 龔奕瑋. "A New Rate-Control Technique on Macroblock Layer." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/57516512965598888520.

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碩士<br>義守大學<br>資訊工程學系碩士班<br>95<br>Many rate-control schemes based on the rate-distortion (R-D) model have been developed. With a constant quantization parameter (QP), blocks with higher complexity will result in more coded bits in encoding process, so these bocks will be allocated more budget bits in the bits allocation. In fact, not only can the complexity of a block affect the number of its coded bits, but also the distribution of its coefficients. In this thesis we propose a new macroblock-layer rate-control scheme that employs a dynamic table containing the information of rate distortions a

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7

Liao, Yu-Li, and 廖芸立. "TMN8 Macroblock Level Quantizer Adjustment under Low Bit Rate." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/19647036560494476878.

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碩士<br>國立交通大學<br>電信工程系<br>90<br>The bit allocation efficiency becomes increasingly significant in low bit rate video. In this work, we focus mainly on how to reduce header bit redundancy and allot bits to macroblocks that have rich luminance and chrominance information. It is achieved by adjusting the quantization parameter QP for every macroblocks. The variation of QP is highly related to parameter K and C. We find that the QP estimated from weighted averaged K and C will result in larger variation and more empty macroblocks. After studying the rate control method of TMN8, we proposed four est

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8

Lin, Ping-Yu, and 林炳佑. "Fast motion estimation and macroblock mode selection algorithm for H.264 video coding." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/33538659472861654449.

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Hung, Sheng-Je, and 洪聖哲. "A Pipeline and Macroblock-Level Parallelism Architecture Design for H.264/AVC Baseline Decoder." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/53115479812516513689.

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碩士<br>國立清華大學<br>資訊工程學系<br>95<br>In urgent demand of hardware architecture design for H.264 coder, pipeline scheme becomes one of most popular solutions. However, the unbalanced time consumption in pipeline stage reduced the throughput and hardware utilization. In this paper, we propose a pipelined architecture with macroblock-level parallelism within pipeline stages. To realize macroblock-level parallelism, higher level pipelining and proper job management between pipeline stages are designed. By efficient scheduling policy and system synchronization, data dependency of intra prediction an

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10

Hsiao, Chung-Liang, and 蕭仲良. "Error Resilience Enhancement of H.264/AVC Video for Wireless Transmission Using Flexible Macroblock Ordering." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/32383514780380263128.

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碩士<br>國立清華大學<br>資訊工程學系<br>95<br>H.264/AVC video coding standard is very suitable for wireless application because of its excellent compression efficiency, network-friendly design and error resilient tools. However, video stream suffers packet losses in error-prone wireless environment, results in quality degradation to video sequences. It will be essential to solve this problem. In this paper, we use explicit type of FMO (Flexible Macroblock Ordering) in H.264/AVC error resilient tool to provide error resilient video transmission. Our method introduces the error sensitivity of MB (macroblock)

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11

Wang, Kuo-Hsin, and 王國信. "Combinibg Coded Block Patterns and Co-located Macroblock Correlation for H.264 Fast Mode Decision." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/jrap45.

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碩士<br>國立臺北科技大學<br>資訊工程系研究所<br>97<br>The H.264 video coding standard substantially improves compression performance and visual quality by using more flexible coding options, notably the inter-mode selection and multiple reference frames. This thesis aims at reducing the H.264 encoding complexity for fulfilling the real-time requirement of conversational video services. The proposed method integrates the coded block pattern (CBP) and information of the co-located macroblock to avoid RDcost evaluations of all possible modes. The CBP is a syntax element in the H.264 macroblock layer, which specifi

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12

Hsieh, Chen-Kuang, and 謝鎮光. "Detecting Shot Manipulation in H.264/AVC Videos by Analyzing the Changes of Macroblock Coding Modes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/52d828.

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碩士<br>國立中央大學<br>資訊工程學系<br>106<br>The purpose of this research is to determine if an investigated H.264/AVC video stream has suffered such manipulations as shot deletion, insertion or replacement. The scheme is designed based on the information of H.264/AVC de-blocking filter, in which the boundary strength (BS) is utilized for analyzing the coding modes of macroblocks. We first employ the BS values to form two feature maps, PRG (Prediction Residual Graph) and IPG (Inter-Prediction Graph). We then further extract two features based on the two feature maps, including VRF (Variation of Residual F

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13

Wang, Jung-hung, and 王榮宏. "A FEC Allocation Method for Unequal Loss Protection of H.264/AVC Video Based on Macroblock Index." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/30068914328119541856.

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碩士<br>國立臺南大學<br>資訊工程學系碩士班<br>100<br>With the rapid advances in multimedia coding and networking technique, provide a variety of multimedia applications on wireless network. However, packet loss of transiting H.264/AVC videos on wireless network is normally inevitable, it lead to the information of the subsequent frame error propagation and the decline of watch quality. In order to solve the problem of packet loss, this paper proposes an estimation method based on the H.264/AVC codec smallest unit of encoding and decoding. Provide to unequal loss protection on basic of the group of picture and

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14

Liao, Hsuan-Chun, and 廖宣竣. "Joint Optimization of Intra Macroblock Refresh Rates in H.264 and Bit Rates Selection in IEEE 802.16e." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/mfw2zd.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>94<br>When multimedia packets are transmitted in wireless channels, they are often lost because of channel congestion or fading. This loss usually results in quality degradation of video. Intra macroblocks (MBs) in H.264 and channel coding in IEEE 802.16e can be exploited to combat this problem. We first establish a rate-distortion model with different intra MB refresh rates and an end-to-end distortion model of IEEE802.16e. These models then are employed to estimate bit rate and distortion in real time. Finally, we adaptively select the optimal refresh rate, code ra

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15

Lee, Po-Hsi, and 李柏希. "A Macroblock Unequal Error Protection Scheme for Uncompressed Wireless Video Transmission Using Iterative 3D-MRF based Decoder." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/58203400905459763167.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>103<br>Due to the development of 57-66GHz millimeter-wave, which provides huge bandwidth and multi-Gbps transmission data rate, uncompressed high-definition video transmission is becoming an interesting application over wireless personal area networks (WPANs). However, mmWaves signals have more attenuation than conventional low frequency signals. Hence, wireless transmission under this low SNR condition become an issue. In this thesis, we proposed a unequal error protection (UEP) scheme which determines the power distributing policy according to the redundancy of a

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16

Tsai, Wen-Hsuna, and 蔡文軒. "A Fast Mode Decision Algorithm for H.264/AVC Based on Macroblock Motion Cost and Mode Statistical Information." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/68031546836848458573.

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碩士<br>中原大學<br>通訊工程碩士學位學程<br>101<br>The H.264/AVC video coding standard can achieve better compression performance than previous video coding standards, such as MPEG-2, MPEG-4, and H.263, because H.264 encoder employs a rate-distortion (RD) optimization strategy to select the best coding mode. With this strategy, the RD costs for all possible modes are computed and the one with the minimum RD cost is considered the best mode. However, this coding step results in very high computational complexity. Therefore, in this thesis, we propose a fast mode decision algorithm based on mode statistical inf

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17

Hsieh, Jin-Long, and 謝金龍. "Combining Coded Block Patterns and Rate-Distortion Cost of Co-located Macroblock for H.264 Fast Mode Decision." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/72w24r.

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碩士<br>國立臺北科技大學<br>資訊工程系研究所<br>97<br>The variable block-size motion compensation used in the H.264 video coding standard, though substantially improves the compression performance, also incurs high computational complexity. In the literature, coded block patterns (CBP) and correlation between co-located macroblocks have been used for fast inter-mode decision. However, these algorithms have limited acceleration performance at high bit rates. In this thesis, we further improve the CBP-based decision algorithm and incorporate selective rate-distortion cost (RDcost) comparisons to expedite the inte

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18

Lin, Zeng-Yao, and 林增垚. "Novel H.264/AVC Flexible Macroblock Ordering based on Wavelet-Domain Partition and its TI DaVinci Platform Implementation." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/01157527536832657444.

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碩士<br>國立雲林科技大學<br>電機工程系碩士班<br>95<br>H.264/AVC is the latest block-based video coding standard from MPEG and VCEG. It not only provides efficient video coding at various bit rates, but also uses some new error resilience tools. Flexible Macroblock Ordering (FMO) is one of the new error resilience tools involved in H.264/AVC. Here, we present a novel algorithm, Wavelet-based Flexible Macroblock Ordering, to adaptively allocate macroblocks into four slice groups based on Discrete Wavelet Transform, and then adopt unequal error protection to enhance the robustness of the slice group of importance

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19

Wei, Jing-Siang, and 魏景祥. "H.264/AVC Flexible Macroblock Ordering Based on Reverse Biorthogonal Wavelet Partition and Its Implementation on TI DaVinci Platform." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/11230421689814386932.

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碩士<br>雲林科技大學<br>電機工程系碩士班<br>97<br>H.264/AVC is the latest block-based video coding standard from MPEG and VCEG. It not only provides efficient video coding at various bit rates, but also uses some new error resilience tools. Flexible Macroblock Ordering (FMO) is one of the new error resilience tools involved in H.264/AVC. Evolved from conventional Flexible Macroblock Ordering (FMO) that is coded out of raster sequence in spatial domain, this paper presents Wavelet-domain slice group partitioning algorithm and unequal error resilience for novel H.264/AVC communication. In detail, this paper dev

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Καβρουλάκης, Νικόλαος. "Ανάπτυξη αρχιτεκτονικών διπλού φίλτρου και FPGA υλοποιήσεις για το H.264 / AVC deblocking filter". Thesis, 2013. http://hdl.handle.net/10889/6033.

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Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η παρουσίαση και η μελέτη ενος εναλλακτικού σχεδιασμού του deblocking φίλτρου του προτύπου κωδικοποίησης βίντεο Η.264. Αρχικά επεξηγείται αναλυτικά ο τρόπος λειτουργίας του φίλτρου και στη συνέχεια προτείνεται ένας πρωτοποριακός σχεδιασμός με χρήση pipeline πέντε σταδίων. Ο σχεδιασμός παρουσιάζει σημαντικά πλεονεκτήματα στον τομέα της ταχύτητας (ενδεικτικά εμφανίζεται βελτιωμένη απόδοση στην συχνότητα λειτουργίας και στο throughput). Αυτό πιστοποιήθηκε από μετρήσεις που έγιναν σε συγκεκριμένα fpga και επαλήθευσαν τα θεωρητικά συμπεράσματα πο

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