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检索条件"主题词=Image and video coding"
281 条 记 录,以下是241-250 订阅
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Neighbourhood structure estimation of images using hierarchical testing
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ELECTRONICS LETTERS 1999年 第25期35卷 2188-2189页
作者: Zimeras, S Aykroyd, RG INRIA IRISA F-35042 Rennes France Univ Leeds Dept Stat Leeds LS2 9JT W Yorkshire England
Methods for estimating model parameters using likelihood techniques are examined and a model selection procedure is proposed for classifying the neighbourhood structure of the image. The techniques are investigated us... 详细信息
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Open-loop rate control for JPEC-LS near lossless image compression
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ELECTRONICS LETTERS 1999年 第6期35卷 465-466页
作者: Jiang, J Reddy, M Univ Glamorgan Sch Comp Pontypridd CF37 1DL M Glam Wales
A low cost rate control scheme is presented to achieve an open-loop rare control for JPEG-LS near lossless coding mode, the forthcoming new standard for lossless image compression. The scheme is implemented by further... 详细信息
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Simple binary wavelet filters for efficient VLSI implementation
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ELECTRONICS LETTERS 1999年 第7期35卷 555-557页
作者: Rassau, AM Chae, SI Eshraghian, K Univ Reading Dept Cybernet Reading RG6 6AY Berks England Seoul Natl Univ Sch Elect Engn Seoul 151742 South Korea
The performance of simple binary wavelet filters is investigated for VLSI implementations. Several low-complexity fillers were found to be useful for VLSI implementations of very low bit rate wavelet coders when hardw... 详细信息
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Method for estimating lossless image compression bound
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ELECTRONICS LETTERS 1999年 第22期35卷 1931-1932页
作者: Zhang, N Zhang, YJ Lin, QD Lin, XG Tsing Hua Univ Dept Elect Engn Beijing 100084 Peoples R China
A practical method for estimating the lossless image compression bound based on high-order conditional entropy analysis is proposed. This analysis can be performed within an ordinary image as opposed to dealing with a... 详细信息
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Selective macroblock level switching for model-based coded video
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ELECTRONICS LETTERS 1999年 第5期35卷 388-389页
作者: Woods, JC Ramanan, S Pearson, DE Univ Essex Dept Elect Syst Engn Colchester CO4 3SQ Essex England
Previous switched model-based coders have employed switching techniques at a high level, switching the entire frame between an H.261 coded image and a model-based image according to a bit-rate/quality metric. The perf... 详细信息
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Accurate analytical model for MPEG coded video traffic
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ELECTRONICS LETTERS 1999年 第17期35卷 1449-1450页
作者: Liu, H Ansari, N Shi, YQ New Jersey Inst Technol Dept Elect & Comp Engn NJ Ctr Wireless Telecommun Newark NJ 07102 USA
Self-similar processes, modulated according to the MPEG GOP (group of pictures) structure, are proposed to accurately capture both the SRD (short range dependency) and LRD (long range dependency) of MPEG video traffic.
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Efficient MPEG-4/H/263 video transcoder for interoperability of heterogeneous multimedia networks
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ELECTRONICS LETTERS 1999年 第11期35卷 863-864页
作者: Dogan, S Sadka, AH Kondoz, AM Univ Surrey Ctr Commun Syst Res Guildford GU2 5HX Surrey England
As well as some similarities, there are a number of differences between MPEG-4 and the H.263 bitstream syntax. The inclusion of a video transcoder is proposed to achieve interoperability between the two video standard... 详细信息
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Data re-ordering technique for lossless LZW continuous-tone image compression
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ELECTRONICS LETTERS 1999年 第20期35卷 1716-1717页
作者: Ng, KS Cheng, LM City Univ Hong Kong Dept Elect Engn Hong Kong SAR Peoples R China
A data re-ordering technique is proposed to enhance the compression performance of lossless LZW image compression over continuous-tone images. The proposed scheme incurs few overheads and functions as a preprocessing ... 详细信息
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Comparison of perceptually uniform quantisation with average error minimisation in image transform coding
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ELECTRONICS LETTERS 1999年 第13期35卷 1067-1068页
作者: Malo, J Ferri, FJ Albert, J Soret, J Univ Valencia E-46100 Valencia Spain
An alternative transform coder design criterion based on restricting the maximum perceptual error of each coefficient is proposed. This perceptually uniform quantisation of the transform domain ensures that the percep... 详细信息
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Scalable wavelet coding for synthetic/natural hybrid images
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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR video TECHNOLOGY 1999年 第2期9卷 244-254页
作者: Sodagar, I Lee, HJ Hatrack, P Zhang, YQ Sarnoff Corp Multimedia Technol Lab Princeton NJ 08512 USA
This paper describes the texture representation scheme adopted for MPEG-4 synthetic/natural hybrid coding (SNHC) of texture maps and images. The scheme is based on the concept of muitiscale zerotree wavelet entropy (M... 详细信息
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