Results 1  10
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28
Overview of Fine Granularity Scalability in MPEG4 Video Standard
 IEEE Transactions on Circuits and System for Video Technology
, 2001
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Motion Compensated Lifting Wavelet And Its Application In Video Coding
 IN: PROCEEDINGS OF THE IEEE INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO
, 2001
"... A motion compensated lifting (MCLIFT) framework is proposed for the 3D wavelet video coder. By using bidirectional motion compensation in each lifting step of the temporal direction, the video frames are effectively decorrelated. With proper entropy coding and bitstream packaging schemes, the MCLI ..."
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Cited by 38 (9 self)
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A motion compensated lifting (MCLIFT) framework is proposed for the 3D wavelet video coder. By using bidirectional motion compensation in each lifting step of the temporal direction, the video frames are effectively decorrelated. With proper entropy coding and bitstream packaging schemes, the MCLIFT wavelet video coder can be scalable in frame rate and quality level. Experimental results show that the MCLIFT video coder outperforms the 3D wavelet video coder with the same entropy coding scheme by an average of 1.11.6dB, and outperforms MPEG4 coder by an average of 0.91.4dB.
A Survey of Application Layer Techniques for Adaptive Streaming Of Multimedia
, 1999
"... The current Internet only supports besteffort traffic. New highspeed technologies such as ATM (asynchronous transfer mode), gigabit Ethernet, fast Ethernet, and frame relay, have spurred higher user expectations. These technologies are expected to support realtime applications such as videoonde ..."
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Cited by 34 (2 self)
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The current Internet only supports besteffort traffic. New highspeed technologies such as ATM (asynchronous transfer mode), gigabit Ethernet, fast Ethernet, and frame relay, have spurred higher user expectations. These technologies are expected to support realtime applications such as videoondemand, Internet telephony, distance education and videobroadcasting. Towards this end, networking methods such as service classes and integrated service models are being developed. Today's
Rate control for H.264 video with enhanced rate and distortion models
 IEEE Trans. on Circuits and Systems for Video Technology
, 2007
"... with enhanced rate and distortion models is proposed in this work. Compared with existing H.264 rate control schemes, our scheme has offered several new features. First, the interdependency between ratedistortion optimization (RDO) and rate control in H.264 is resolved via quantization parameter e ..."
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Cited by 30 (4 self)
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with enhanced rate and distortion models is proposed in this work. Compared with existing H.264 rate control schemes, our scheme has offered several new features. First, the interdependency between ratedistortion optimization (RDO) and rate control in H.264 is resolved via quantization parameter estimation and update. Second, since the bits of the header information may occupy a larger portion of the total bit budget, which is especially true when being coded at low bit rates, a rate model for the header information is developed to estimate header bits more accurately. The number of header bits is modeled as a function of the number of nonzero motion vector (MV) elements and the number of MVs. Third, a new source rate model and a distortion model are proposed. For this purpose, coded 4 4 blocks are identified and the number of source bits and distortion are modeled as functions of the quantization stepsize and the complexity of coded 4 4 blocks. Finally, a RD optimized bit allocation scheme among macroblocks (MBs) is proposed to improve picture quality. Built upon the above ideas, a rate control algorithm is developed for the H.264 baselineprofile encoder under the constant bit rate constraint. It is shown by experimental results that the new algorithm can control bit rates accurately with the RD performance significantly better than that of the rate control algorithm implemented in the H.264 software encoder JM8.1a. Index Terms—H.264, optimal bit allocation, rate control, ratedistortion (RD) optimization. I.
Arbitrarily Shaped Video Object Coding by Wavelet
 IEEE International Symposium for Circuit and Systems (ISCAS 2000
, 2000
"... Video object coding is one of the most important functionalities proposed by MPEG4. In this paper, we propose a new wavelet method to encode the texture of an arbitrarily shaped object, both for the still and for video object. The method uses the shape adaptive wavelet transform (SADWT) in MPEG ..."
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Cited by 17 (1 self)
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Video object coding is one of the most important functionalities proposed by MPEG4. In this paper, we propose a new wavelet method to encode the texture of an arbitrarily shaped object, both for the still and for video object. The method uses the shape adaptive wavelet transform (SADWT) in MPEG4 still object coding, but with a computationally more efficient lifting implementation.
Global MINMAX Interframe Bit Allocation for Embedded Video Coding
 in Proceedings of Data Compression Conference, Snowbird, UT
, 2004
"... We present three new bit allocation techniques, the MultiStage algorithm, the Ratio algorithm, and the Pseudo Iframe method. The MultiStage and Ratio algorithms are global interframe bit allocation algorithms for embedded video coders, which attempt to minimize the maximum distortion of any frame. ..."
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Cited by 5 (2 self)
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We present three new bit allocation techniques, the MultiStage algorithm, the Ratio algorithm, and the Pseudo Iframe method. The MultiStage and Ratio algorithms are global interframe bit allocation algorithms for embedded video coders, which attempt to minimize the maximum distortion of any frame.
Rate adaptive multimedia streams: Optimization, admission control, and distributed algorithms
 IEEE/ACMTRANSACTIONS ON NETWORKING
, 2005
"... This work investigates support of rate adaptive multimedia streams on communication networks. Optimal and practical mechanisms to maximize the customer average quality of service (QoS), defined in terms of a normalized time average received rate, are established. By scaling the arrival rate and lin ..."
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Cited by 5 (2 self)
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This work investigates support of rate adaptive multimedia streams on communication networks. Optimal and practical mechanisms to maximize the customer average quality of service (QoS), defined in terms of a normalized time average received rate, are established. By scaling the arrival rate and link capacity, we obtain asymptotic expressions for customer average QoS in the case of networks with single bottleneck links. The optimal adaptation policy is identified as the solution to an integer program which has an intuitive “sort by volume ” interpretation for the case of single bottleneck links, where stream volume is the total number of bits associated with a stream at its maximum resolution. Our asymptotic analysis shows the optimal adaptation policy may yield performance improvements of up to 42 % over baseline policies. We demonstrate that a static multiclass admission control policy can achieve the same asymptotic QoS as that of the optimal adaptation policy. This implies that dynamic adaptation may be unnecessary for large capacity networks with appropriate call admission.
MultiStage: A MINMAX Bit Allocation Algorithm for Video Coders
"... c○2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work ..."
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Cited by 4 (0 self)
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c○2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work
Distortion Prediction For MotionCompensated Lifted Haar Wavelet Transform and its application to Rate Allocation
 Proc. of Picture Coding Symposium
, 2004
"... In this paper we present a solution for low complexity rate allocation for video compression using motioncompensated lifted wavelet transform. We assume that after temporal decomposition a standard still image coding scheme like JPEG2000 is used to encode the resulting temporal bandpass frames. We s ..."
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Cited by 4 (2 self)
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In this paper we present a solution for low complexity rate allocation for video compression using motioncompensated lifted wavelet transform. We assume that after temporal decomposition a standard still image coding scheme like JPEG2000 is used to encode the resulting temporal bandpass frames. We show that the reconstruction distortion of a group of pictures can be accurately predicted from the distortion introduced into the temporally decomposed frames despite the nonorthonormality of the transform. We model the operational ratedistortion function of the still image coding using a simple parametric model and solve the rate allocation problem by minimizing a Lagrangian cost function. We compare our rateallocation approach with a heuristic scheme and observe significant improvements in terms of ratedistortion performance at dramatically reduced computational complexity. The gains are particularly significant if the motion field is represented with subpel accuracy. 1.
Analysis of the efficiency of SNRscalable strategies for motion compensated video coders
 in Proc. IEEE Int. Conf. on Image Processing
, 2004
"... In this paper, an analysis of the efficiency of three signaltonoise ratio (SNR) scalable strategies for motion compensated video coders and their nonscalable counterpart is presented. After assuming some models and hypotheses with respect to the signals and systems involved, we have obtained the ..."
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Cited by 3 (2 self)
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In this paper, an analysis of the efficiency of three signaltonoise ratio (SNR) scalable strategies for motion compensated video coders and their nonscalable counterpart is presented. After assuming some models and hypotheses with respect to the signals and systems involved, we have obtained the SNR of each coding strategy as a function of the decoding rate. To validate our analysis, we have compared our theoretical results with data from encodings of real video sequences. Results show that our analysis describes qualitatively the performance of each scalable strategy, and therefore, it can be useful to understand main features of each scalable technique and what factors influence their efficiency. 1.