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检索条件"主题词=Video coder"
35 条 记 录,以下是21-30 订阅
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Multiple description video coding using motion-compensated algorithm  5
Multiple description video coding using motion-compensated a...
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5th IEEE Workshop on Multimedia Signal Processing (MMSP 2002)
作者: Franchi, N Fumagalli, M Lancini, R Politecn Milan CEFRIEL I-20133 Milan Italy
This paper proposes a multiple description (MD) video coder, which uses motion-compensated predictions. We suggested a new algorithm of MD named Polyphase DownSampling that describes Intra and Inter frames. Results sh... 详细信息
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Very low bit rate video coding using virtual SPIHT
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ELECTRONICS LETTERS 2001年 第1期37卷 40-42页
作者: Khan, E Ghanbari, M Univ Essex Dept Elect Syst Engn Colchester CO4 3SQ Essex England
A virtual SPIHT (VSPIHT) technique that is based on the SPIHT and virtual zero-tree concepts is proposed. It combines virtually generated zero trees on the top of SPIHT's zero trees to reduce the effective number ... 详细信息
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Scalable wavelet video coding using aliasing-reduced hierarchical motion compensation
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IEEE TRANSACTIONS ON IMAGE PROCESSING 2000年 第5期9卷 778-791页
作者: Yang, XG Ramchandran, K Hewlett Packard Labs Imaging Technol Dept Palo Alto CA 94304 USA Univ Calif Berkeley Dept Elect Engn & Comp Sci Berkeley CA 94720 USA
We describe a spatially scalable video coding framework in which motion correspondences between successive video frames are exploited in the wavelet transform domain. The basic motivation for our coder is that motion ... 详细信息
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A very low bit rate video coder based on vector quantization
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IEEE TRANSACTIONS ON IMAGE PROCESSING 1996年 第2期5卷 263-273页
作者: CorteReal, L Alves, AP Departamento de Engenharia ElectrotCcnica e de Computadores Faculdade de Engenharia Universidade do Porto Porto Portugal
This work describes a video coder based on a hybrid DPCM-vector quantization algorithm that is suited for bit rates ranging from 8-16 kb/s, The proposed approach involves segmenting difference images into variable-siz... 详细信息
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On the computation of warping-based motion compensation in video sequence coding
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SIGNAL PROCESSING-IMAGE COMMUNICATION 1998年 第2期13卷 155-160页
作者: Neri, A Colonnese, S Univ Rome 3 Dept Elect Engn I-00146 Rome Italy Fdn Ugo Bordoni I-00142 Rome Italy
The paper illustrates a method for affine warping-based motion compensation using the computing architecture of H263 advanced prediction (AP) mode, namely, changing the (constant) weighting matrices in the H263 AP alg... 详细信息
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Hierarchical motion estimator (HME) for block-based video coders
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IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 1997年 第4期43卷 1320-1330页
作者: Accame, M De Natale, FGB Giusto, DD Univ Genoa Dept Biophys & Elect Engn I-16145 Genoa Italy Univ Cagliari Dept Elect & Elect Engn I-09123 Cagliari Italy
A hierarchical block-based motion estimation strategy for video sequence coding is proposed, which allows to reduce both the computational load and the number of transmitted motion vectors, The estimation is performed... 详细信息
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Adaptive rate controlling for reliable video communication over wireless packet networks
Adaptive rate controlling for reliable video communication o...
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International Conference on Image Processing
作者: Rajugopal, GR Hafez, RHM Carleton Univ Ottawa Canada
This paper investigates the adaptive dynamic rate controlled video transmission for robust video communication under packet wireless environment. The video coder comprises of wavelet transform (WT), multi-resolution m... 详细信息
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Rate control feedback mechanism for packet video networks
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ELECTRONICS LETTERS 1996年 第8期32卷 716-717页
作者: Sadka, AH Eryurtlu, F Kondoz, AM Centre for Satellite Engineering Research University of Surrey Guildford United Kingdom
The authors incorporate a newly proposed late control feedback mechanism (RCFM) in an H.263 video coder. RCFM adapts to network conditions to locally drop video packets and then discard corresponding macroblocks (MBs)... 详细信息
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MPEG-2 video compression
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ELECTRONICS & COMMUNICATION ENGINEERING JOURNAL 1995年 第6期7卷 257-264页
作者: Tudor, PN Res. & Dev. Dept. BBC Tadworth UK
MPEG-2 is an extension of the MPEG-1 international standard for digital compression of audio and video signals. MPEG-1 was designed to code progressively scanned video at bit rates up to about 1.5 Mbit/s for applicati... 详细信息
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Chroma coding for video at very low bit rates
Chroma coding for video at very low bit rates
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International Conference on Image Processing
作者: Karam, L Podilchuk, C AT&T BELL LABS SIGNAL PROC RES DEPTMURRAY HILLNJ 07974
Color pictures are usually compressed in a luminance-chrominance coordinate space. We consider the problem of encoding the chrominance information for very low bit rate video coding systems aimed at bit rates in the r... 详细信息
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