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IEEE Transactions on Circuits and Systems for Video Technology

Issue 4 • Date Apr 2001

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Displaying Results 1 - 10 of 10
  • Content-based video parsing and indexing based on audio-visual interaction

    Publication Year: 2001, Page(s):522 - 535
    Cited by:  Papers (32)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB) | HTML iconHTML

    A content-based video parsing and indexing method is presented in this paper, which analyzes both information sources (auditory and visual) and accounts for their inter-relations and synergy to extract high-level semantic information. Both frame- and object-based access to the visual information is employed. The aim of the method is to extract semantically meaningful video scenes and assign semant... View full abstract»

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  • A generic postprocessing technique for image compression

    Publication Year: 2001, Page(s):546 - 553
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB) | HTML iconHTML

    A postprocessing technique is developed for image quality enhancement. In this method, a distortion-recovery model extracts multiresolution edge features from the decompressed image and uses these visual features as input to estimate the difference image between the original uncompressed image and the decompressed image. Coding distortions are compensated by adding the model output to the decompre... View full abstract»

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  • On optimal entropy-constrained deadzone quantization

    Publication Year: 2001, Page(s):560 - 563
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (84 KB) | HTML iconHTML

    This paper studies entropy-constrained deadzone quantizer design. It first shows that for symmetric uni-modal distributions, the entropy of the quantized output is a monotonic decreasing function of the outer bin-width of the deadzone quantizer. Based on this result, a fast algorithm is introduced for optimal entropy-constrained deadzone quantizer design. As experimental results, we give the optim... View full abstract»

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  • An advanced contrast enhancement using partially overlapped sub-block histogram equalization

    Publication Year: 2001, Page(s):475 - 484
    Cited by:  Papers (211)  |  Patents (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1188 KB) | HTML iconHTML

    An advanced histogram-equalization algorithm for contrast enhancement is presented. Histogram equalization is the most popular algorithm for contrast enhancement due to its effectiveness and simplicity. It can be classified into two branches according to the transformation function used: global or local. Global histogram equalization is simple and fast, but its contrast-enhancement power is relati... View full abstract»

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  • Rate control for low-bit-rate video via variable-encoding frame rates

    Publication Year: 2001, Page(s):512 - 521
    Cited by:  Papers (70)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB) | HTML iconHTML

    A novel rate control algorithm with a variable-encoding frame rate method is proposed for low-bit-rate video coding. Most existing rate control algorithms for low-bit-rate video focus on bit allocation at the macroblock level under a constant frame-rate assumption. The proposed rate control algorithm is able to adjust the encoding frame rate at the expense of tolerable time-delay. The new rate con... View full abstract»

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  • An efficient architecture for two-dimensional discrete wavelet transform

    Publication Year: 2001, Page(s):536 - 545
    Cited by:  Papers (74)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB) | HTML iconHTML

    This paper proposes an efficient architecture for the two-dimensional discrete wavelet transform (2-D DWT). The proposed architecture includes a transform module, a RAM module, and a multiplexer. In the transform module, we employ the polyphase decomposition technique and the coefficient folding technique to the decimation filters of stages 1 and 2, respectively. In comparison with other 2-D DWT a... View full abstract»

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  • Context-based lossless image coding using EZW framework

    Publication Year: 2001, Page(s):554 - 559
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB) | HTML iconHTML

    Previous research advances have shown that wavelet-based image-compression techniques offer several advantages over traditional techniques in terms of progressive transmission capability, compression efficiency, and bandwidth utilization. The embedded zerotree wavelet (EZW) coding technique suggested by Shapiro (1992), and its modification-set partitioning in hierarchical trees (SPIHT), suggested ... View full abstract»

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  • Buffer management and dimensioning for a pull-based parallel video server

    Publication Year: 2001, Page(s):485 - 496
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB) | HTML iconHTML

    There has been a trend toward designing video-on-demand systems using parallel-server architectures. By exploiting server-level parallelism, researchers can break through the performance limit of a single server, while keeping the system cost low by leveraging on commodity hardware platforms. A number of studies have demonstrated the feasibility of building parallel video servers around the client... View full abstract»

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  • A fast scheme for image size change in the compressed domain

    Publication Year: 2001, Page(s):461 - 474
    Cited by:  Papers (153)  |  Patents (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB) | HTML iconHTML

    Given a video frame in terms of its 8×8 block-DCT coefficients, we wish to obtain a downsized or upsized version of this frame also in terms of 8×8 block-DCT coefficients. The DCT being a linear unitary transform is distributive over matrix multiplication. This fact has been used for downsampling video frames in the DCT domain. However, this involves matrix multiplication with the DCT ... View full abstract»

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  • Optimizing motion-vector accuracy in block-based video coding

    Publication Year: 2001, Page(s):497 - 511
    Cited by:  Papers (24)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB) | HTML iconHTML

    All motion-vectors are encoded with the same tired accuracy, typically 1/2-pixel accuracy, but the best motion-vector accuracies are not known. We present a theoretical framework to find the motion-vector accuracies that minimize the total encoding rate with this type of coder, for the classical case where all motion-vectors are encoded with the same accuracy, and for new cases where the accuracy ... View full abstract»

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Aims & Scope

The emphasis is focused on, but not limited to:
1. image/video processing
2. image/video analysis and computer vision
3. image/video compression
4. image/video communication
5. image/video storage
6. image/video hardware/software systems
7. image/video applications 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Dan Schonfeld
Multimedia Communications Laboratory
ECE Dept. (M/C 154)
University of Illinois at Chicago (UIC)
Chicago, IL 60607-7053
tcsvt-eic@tcad.polito.it

Managing Editor
Jaqueline Zelkowitz
tcsvt@tcad.polito.it