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Circuits and Systems for Video Technology, IEEE Transactions on

Issue 1 • Date Jan. 2007

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  • Table of contents

    Publication Year: 2007 , Page(s): C1
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  • IEEE Transactions on Circuits and Systems for Video Technology publication information

    Publication Year: 2007 , Page(s): C2
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  • Message From the Editor-in-Chief

    Publication Year: 2007 , Page(s): 1
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  • Multiple Tree Video Multicast Over Wireless Ad Hoc Networks

    Publication Year: 2007 , Page(s): 2 - 15
    Cited by:  Papers (29)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1419 KB) |  | HTML iconHTML  

    In this paper, we propose multiple tree construction schemes and routing protocols for video streaming over wireless ad hoc networks. The basic idea is to split the video into multiple parts and send each part over a different tree, which are constructed to be disjoint with each other so as to increase robustness to loss and other transmission degradations. Specifically, we propose two novel multiple tree multicast protocols. Our first scheme constructs two disjoint multicast trees in a serial, but distributed fashion, and is referred to as serial multiple disjoint tree multicast routing protocol. It achieves reasonable tree connectivity while maintaining disjointness of two trees. In order to reduce routing overhead and construction delay, we further propose parallel multiple nearly-disjoint multicast trees protocol, which is also shown to achieve reasonable tree connectivity. Simulations show that resulting video quality for either scheme is significantly higher than that of single tree multicast, with similar routing overhead and forwarding efficiency View full abstract»

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  • Geometrico-Harmonic Data Broadcasting and Receiving Scheme for Popular Videos

    Publication Year: 2007 , Page(s): 16 - 25
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (713 KB) |  | HTML iconHTML  

    Among all the data broadcasting schemes, the harmonic scheme has been reported to provide the best performance for user latency; however, it does not always deliver the video data to the users in time. To provide the video data reliably, its two main variants, i.e., cautious and quasi-harmonic schemes have been proposed. These variants require a video to be divided into large number of subsegments that leads to a problem of management complexity. Besides the manageability problem, these variants require more bandwidth than the original harmonic scheme. The cautious and the quasi-harmonic schemes need, respectively, 0.50*b and 0.1771*b more bandwidth than the original harmonic scheme in limiting case. In this paper, we propose a new broadcasting scheme that is named as the geometrico-harmonic scheme. This scheme provides the video data to the users in time unlike the original harmonic scheme, and also its bandwidth requirement is very much same as that of the original harmonic scheme. In comparison to the cautious and the quasi-harmonic schemes, it has better performance for the user latency and the buffer space. For disk transfer rate, its performance is same as that of the cautious harmonic scheme, but in comparison the quasi-harmonic scheme, it performs better View full abstract»

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  • Application-Specific Data Path for Highly Efficient Computation of Multistandard Video Codecs

    Publication Year: 2007 , Page(s): 26 - 42
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1149 KB) |  | HTML iconHTML  

    A novel mechanism that flexibly adapts data flows and configures computational units is proposed to establish an application-specific data path in the digital signal processor (DSP) that can efficiently perform multistandard video codecs. Based on this mechanism, the proposed application-specific data path, using the very long instruction word (VLIW) architecture with eight computational units of five arithmetic logic units (ALUs), one multiplier and two load/store units, is designed to perform five adaptive operations according to the characteristics of the low-level functions of MPEG-2, MPEG-4 and H.264/AVC video codecs. Using these adaptive operations, the proposed application-specific data path reduces the number of clock cycles required by the TI TMS320C64x data path to perform the low-level functions of the MPEG-2 video encoder and the H.264/AVC video decoder by 23.10% and 28.43%, respectively, for 30 352times288-pixel Foreman frames. Additionally, considering the operating frequency, the proposed application-specific data path reduces the computation time required by the TI TMS320C64x data path to realize the abovementioned encoder and decoder by 19.86% and 25.41%, respectively. Based on the TSMC 0.18-mum CMOS cell library, the proposed application-specific data path is implemented, and exhibits the highest ratio of computational power to hardware cost among all of the data paths associated with the conventional DSPs in implementing the low-level functions of video codecs View full abstract»

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  • Video Adaptation for Small Display Based on Content Recomposition

    Publication Year: 2007 , Page(s): 43 - 58
    Cited by:  Papers (25)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1767 KB) |  | HTML iconHTML  

    The browsing of quality videos on small hand-held devices is a common scenario in pervasive media environments. In this paper, we propose a novel framework for video adaptation based on content recomposition. Our objective is to provide effective small size videos which emphasize the important aspects of a scene while faithfully retaining the background context. That is achieved by explicitly separating the manipulation of different video objects. A generic video attention model is developed to extract user-interest objects, in which a high-level combination strategy is proposed for fusing the adopted three types of visual attention features: intensity, color, and motion. Based on the knowledge of media aesthetics, a set of aesthetic criteria is presented. Accordingly, these objects are well reintegrated with the direct-resized background to optimally match the specific screen sizes. Experimental results demonstrate the efficiency and effectiveness of our approach View full abstract»

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  • MultiStage: A MINMAX Bit Allocation Algorithm for Video Coders

    Publication Year: 2007 , Page(s): 59 - 67
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (835 KB) |  | HTML iconHTML  

    Most bit allocation algorithms for video are geared toward optimizing the average frame distortion. However, video sequences optimized this way may exhibit sudden changes in distortion, or "flicker," which can significantly affect the perceived quality of the sequence. An alternative approach is to minimize the maximum frame distortion, which aims to produce a constant-quality sequence, thus avoiding the flicker problem. In this work, we present a new algorithm for constant-quality video, called MultiStage. We first show how MultiStage works for an embedded bit plane coder, and we then demonstrate that it can be applied to traditional quantization-based coders, such as H.263 and H.264, in conjunction with a novel single-frame block-level rate-distortion optimization algorithm based on multiple-choice knapsack. We show that MultiStage achieves very good results, both in terms of maximum distortion and average distortion View full abstract»

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  • A Novel Rate Control Scheme for Low Delay Video Communication of H.264/AVC Standard

    Publication Year: 2007 , Page(s): 68 - 78
    Cited by:  Papers (72)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2228 KB) |  | HTML iconHTML  

    This paper presents a novel rate control scheme for low delay video communication of H.264/AVC standard. A switched mean-absolute-difference (MAD) prediction scheme is introduced to enhance the traditional temporal MAD prediction model, which is not suitable for predicting abrupt MAD fluctuations. Our new model could reduce the MAD prediction error by up to 69%. Furthermore, an accurate linear rate-quantization (R-Q) model is also formulated to describe the relationship between the total amount of bits for both texture and nontexture information and the quantization parameter (QP), so that the negative effect caused by the inaccurate estimation of nontexture bits is removed. By exploring the relationship between peak signal-to-noise ratio and QP value, the proposed linear R-Q model could further optimize QP calculation at the macroblock level. When compared with the rate control scheme JVT-G012 which is adopted by the latest JVT H.264/AVC reference model JM9.8, the proposed rate control algorithm could reduce the mismatch between actual bits and target ones by up to 75%. To meet the low delay requirement, the buffer is better controlled to prevent overflowing and underflowing. The average luminance PSNR of reconstructed video is increased by up to 1.13 dB at low bit rates, and the subjective video quality is also improved View full abstract»

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  • Automatic Detection of Prominence Eruption Using Consecutive Solar Images

    Publication Year: 2007 , Page(s): 79 - 85
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1283 KB) |  | HTML iconHTML  

    Prominences are clouds of relatively cool and dense gas in the solar atmosphere. In this paper, we present a new method to detect and characterize the prominence eruptions. The input is a sequence of consecutive Halpha solar images, and the output is a list of prominence eruption events detected. We extract the limb events and measure their associated properties by applying image processing techniques. First, we perform image normalization and noise removal. Then, we isolate the limb objects and identify the prominence features. Finally, we apply pattern recognition techniques to classify the eruptive prominences. The characteristics of prominence eruptions, such as brightness, angular width, radial height and velocity are measured. The method presented can lead to automatic monitoring and characterization of solar events View full abstract»

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  • Modeling Quantization of Affine Motion Vector Coefficients

    Publication Year: 2007 , Page(s): 86 - 97
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (817 KB) |  | HTML iconHTML  

    Affine motion compensated prediction (AMCP) is an advanced tool which may be incorporated into future video compression standards. There are numerous coders already using AMCP . However the increased number of motion vector components is a disadvantage and quantizing these components can have significant consequences on the difference macro blocks (DMBs). This paper examines the quantization of affine motion vector (AMV) coefficients, by deriving a quadratic relationship between DMB energy and AMV quantization step size. Mathematical derivations and simulations are provided, including two literature comparisons demonstrating the benefits of this work. In the first comparison, the quantization of orthogonalized AMVs in is compared with quantization guided by the novel quadratic model. In the second comparison, Nokia's MVC coder is modified to use the quadratic model to generate quantization step sizes for various granularities; sequence, frame, and quarter-frame, demonstrating up to 8.7% bit rate reductions. Model driven AMV quantization step size choices are shown to be very close to and even outperform limited exhaustive search AMV quantization step size choices, at a quarter of the computational cost View full abstract»

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  • An Image Quality Evaluation Method Based on Digital Watermarking

    Publication Year: 2007 , Page(s): 98 - 105
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (468 KB) |  | HTML iconHTML  

    As a practical and novel application of watermarking, this paper presents a digital watermarking-based image quality evaluation method that can accurately estimate image quality in terms of the classical objective metrics, such as peak signal-to-noise ratio (PSNR), weighted PSNR (wPSNR), and Watson just noticeable difference (JND), without the need for the original image. In this method, a watermark is embedded into the discrete wavelet transform (DWT) domain of the original image using a quantization method. Considering that different images have different frequency distributions, the vulnerability of the watermark for the image is adjusted using automatic control. After the auto-adjustment, the degradation of the extracted watermark can be used to estimate image quality in terms of the classical metrics with high accuracy. We calculated PSNR, wPSNR, and Watson JND quality measures for JPEG compressed images and compared the values with those estimated using the watermarking-based approach. We found that the calculated and estimated measures of quality to be highly correlated, suggesting that the proposed method can provide accurate measures of image quality under JPEG compression. Furthermore, given the similarity between JPEG and MPEG-2, this achievement has paved the road for the practical and accurate quality evaluation of MPEG-2 compressed video. We believe that this achievement is of great importance to video broadcasting View full abstract»

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  • Memory-Efficient Semi-Quasi Renormalization for Arithmetic Coding

    Publication Year: 2007 , Page(s): 106 - 110
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (349 KB) |  | HTML iconHTML  

    We propose a highly efficient, look-up table-based, renormalization method that can be used by any binary arithmetic encoder with the follow-on procedure. It replaces the time-consuming branching operations in the renormalization process with table look-ups and some simple bit-wise operations. We show that our new renormalization method outperforms the currently used ones with much less memory requirement than the previously known, table-based quasi-coder View full abstract»

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  • A Fast DV to MPEG-4 Transcoder Integrated With Resolution Conversion and Quantization

    Publication Year: 2007 , Page(s): 111 - 119
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1210 KB) |  | HTML iconHTML  

    We propose a fast transcoder from digital video (DV) to MPEG-4 in the coded domain. Since DV is interlaced sequence whereas MPEG-4 (SIF) is progressive sequence and different discrete cosine transform (DCT) mode (2*4*8DCT) is used in DV, different compressed domain transcoding method from that of MPEG to MPEG conversion is required. We have exploited matrix conversion reflecting these properties and introduce approximation and integration of resolution conversion and quantization process. Simulation results of DV to MPEG-4 conversion show that the proposed method can achieve very fast conversion while maintaining high transcoding performance when compared with base-band transcoding and significant improvement over conventional method is also realized View full abstract»

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  • An Efficient Matrix-Based DCT Splitter/Merger for MPEG-2-to-AVC/H.264 Transform Kernel Conversion

    Publication Year: 2007 , Page(s): 120 - 125
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (365 KB) |  | HTML iconHTML  

    An efficient matrix-based discrete cosine transform splitter/merger for realizing MPEG-2 to AVC/H.264 transform kernel conversion is presented in this paper. Due to its matrix-based nature, the proposed transform kernel converter can be readily implemented by specific multimedia instruction set available today. Both the computational complexity and numerical error behavior of the proposed approach are shown to be superior to that of the straightforward (full decoding + reencoding) one. In other words, the effectiveness of the proposed algorithm can be justified by examining both the execution speed and the reproduced image quality View full abstract»

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  • 2007 IEEE International Symposium on Circuits and Systems (ISCAS 2007)

    Publication Year: 2007 , Page(s): 126
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  • 2007 International Conference on Multimedia & Expo (ICME)

    Publication Year: 2007 , Page(s): 127
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  • In this issue

    Publication Year: 2007 , Page(s): 128
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  • IEEE Circuits and Systems Society Information

    Publication Year: 2007 , Page(s): C3
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  • IEEE Transactions on Circuits and Systems for Video Technology Information for authors

    Publication Year: 2007 , Page(s): C4
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Aims & Scope

The emphasis is focused on, but not limited to:
1. Video A/D and D/ A
2. Video Compression Techniques and Signal Processing
3. Multi-Dimensional Filters and Transforms
4. High Speed Real-Tune Circuits
5. Multi-Processors Systems—Hardware and Software
6. VLSI Architecture and Implementation for Video Technology 

 

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