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Guest Editorial: Special Issue on Real-Time Digital Video over Multimedia Networks
Real-Time Imaging 5, 293±294 (1999) Article No. rtim.1999.0192, available online at http://www.idealibrary.com on
Guest Editorial: Special Issue on Real-Time Digital Video over Multimedia Networks Editorial Multimedia communication aims at transferring various forms of data, audio and video simultaneously in a single network. The applications such as videoconferencing, digital television, multimedia class room teaching, distance learning and video-on-demand make use of multimedia networks and communications technology to provide quality of service (QoS). Digital video and its eective transmission in real-time over a multimedia network are some of the key aspects which have to be resolved in order to provide a good QoS to the consumers of multimedia services. Digital video and its transmission over multimedia networks suer from numerous problems in current technology and thus researchers are spending their valuable time and eort to further the research with the hope of achieving promising results. They need the development of eective system architecture for client/ server synchronization, QoS control, techniques and algorithms for video compression in real-time, image retrieval techniques for interactive multimedia, real-time digital video motion estimation, color transform techniques in real-time, modeling of video sources and perceptual quality measure. In this special issue we have provided seven quality research papers that address some of the above issues. The ®rst paper Multi-Object Tracking in Video by J.I. Agbinya and D. Rees presents a set of algorithms based on color histogram back-projection which simplify the tracking of multiple moving objects within video sequences. It provides an interactive improvement on the drawing pad technology currently used for video annotation in sports broadcasting.
1077-2014/99/100293+02 $30.00/0
The second paper User-Oriented QoS Analysis in MPEG-2 Video Delivery by O. Verscheure, P. Frossard and M. Hamdi addresses the problem of video quality prediction and control for high resolution video transmitted over lossy packet networks. The authors have pointed out that the combined eect of the coding bit rate and the network impairments on the user perceived quality is one of the most important factor in the design and development of packet video services. The paper shows that the reachable quality is upperbound and exhibits optimal coding rate for a given packet loss ratio when jointly studying the impact of coding bit rate and packet loss. The third paper Congestion Control for Interactive Video-on-Demand over ATM by P. Branch and M. Atiquzzaman evaluates the suitability of a number of congestion control schemes for carrying interactive video-on-demand. The schemes are based on the service categories of Asynchronous Transfer Mode (ATM). The paper shows that the re-negotiated constant bit rate (CBR) service category has considerable potential for carrying interactive video-on-demand over a high- speed network, such as ATM. It also includes a number of useful references in this area. The fourth paper Joint Source/Channel Coding to Maximize Perceptual Video Quality on Packet Networks by S.-W. Kim, S. Suthaharan, G.-H. Lee, H.-K. Lee and K.R. Rao designs a joint source and channel coding (JSCC) scheme to maximize the perceptual video quality in a real-time multimedia communication environment. It uses wavelet transform to exploit human visual system's spatial and temporal characteristics of video data. The paper shows by simulation and real video experiments that the proposed scheme yields better
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1999 Academic Press
294
EDITORIAL
results than other JSCC schemes such as EDF (early deadline ®rst) scheduling algorithm and (m, k) scheduling algorithm. The ®fth paper Comparison of MPEG Domain Elements for Low-Level Shot Boundary-Detection by W.J. Heng, K.N. Ngan and M.H. Lee justi®es the reliability of the three dierent elements (chromatic barycenter, luminance and macroblock size) in the compressed domain used in low-level shot boundary detection. These three elements are extracted from MPEG video for examination. It shows that both macroblock size and luminance elements could be unstable under certain condition and detection in the color domain is essential for accurate shot boundary detection. It also shows that, of all the elements, chromatic barycenter gives the best performance. The sixth paper Neuro-Fuzzy Modeling and Prediction of VBR MPEG Video Sources by B. Qiu, S. Suthaharan and H.R. Wu addresses the neuro-fuzzy modeling and prediction on trac intensity of digital video sources. The authors have considered the video sources that are coded with hybrid motion compensation/dierential pulse code modulation/discrete cosine transform (MC/ DPCM/DCT). The paper discusses the computational advantages of the proposed method and shows it can
achieve multi-step ahead prediction on-line and in realtime without the uses of dedicated hardware. The seventh paper Real-Time VBR Rate Control of MPEG Video based upon Lexicographic Bit Allocation by D.T. Hoang presents a low-complexity algorithm for variable-bit-rate control, suitable for low-delay, realtime applications. The paper shows how the algorithm can be applied either to produce a desired quality level or to meet global bit budget. We would like to thank all the authors for their interest, eort and the high quality research contributions to this issue. We would also like to thank all the referees for their valuable comments and recommendation. Without their support, it would have been impossible to produce such a successful issue. Our special thanks go to Phillip A. Laplante and Alexander D. Stoyen, Editors-in-Chief of Real-Time Imaging, for their support to bringing this special issue into existence. Guest Editors S. Suthaharan, Tennessee State University, USA. S. Sathananthan, Tennessee State University, USA. C. Markhauser, University of Simon Bolivar, Venezuela. L. Guan, University of Sydney, Australia.
Guest Editorial: Special Issue on Real-Time Digital Video over Multimedia Networks Editorial Multimedia communication aims at transferring various forms of data, audio and video simultaneously in a single network. The applications such as videoconferencing, digital television, multimedia class room teaching, distance learning and video-on-demand make use of multimedia networks and communications technology to provide quality of service (QoS). Digital video and its eective transmission in real-time over a multimedia network are some of the key aspects which have to be resolved in order to provide a good QoS to the consumers of multimedia services. Digital video and its transmission over multimedia networks suer from numerous problems in current technology and thus researchers are spending their valuable time and eort to further the research with the hope of achieving promising results. They need the development of eective system architecture for client/ server synchronization, QoS control, techniques and algorithms for video compression in real-time, image retrieval techniques for interactive multimedia, real-time digital video motion estimation, color transform techniques in real-time, modeling of video sources and perceptual quality measure. In this special issue we have provided seven quality research papers that address some of the above issues. The ®rst paper Multi-Object Tracking in Video by J.I. Agbinya and D. Rees presents a set of algorithms based on color histogram back-projection which simplify the tracking of multiple moving objects within video sequences. It provides an interactive improvement on the drawing pad technology currently used for video annotation in sports broadcasting.
1077-2014/99/100293+02 $30.00/0
The second paper User-Oriented QoS Analysis in MPEG-2 Video Delivery by O. Verscheure, P. Frossard and M. Hamdi addresses the problem of video quality prediction and control for high resolution video transmitted over lossy packet networks. The authors have pointed out that the combined eect of the coding bit rate and the network impairments on the user perceived quality is one of the most important factor in the design and development of packet video services. The paper shows that the reachable quality is upperbound and exhibits optimal coding rate for a given packet loss ratio when jointly studying the impact of coding bit rate and packet loss. The third paper Congestion Control for Interactive Video-on-Demand over ATM by P. Branch and M. Atiquzzaman evaluates the suitability of a number of congestion control schemes for carrying interactive video-on-demand. The schemes are based on the service categories of Asynchronous Transfer Mode (ATM). The paper shows that the re-negotiated constant bit rate (CBR) service category has considerable potential for carrying interactive video-on-demand over a high- speed network, such as ATM. It also includes a number of useful references in this area. The fourth paper Joint Source/Channel Coding to Maximize Perceptual Video Quality on Packet Networks by S.-W. Kim, S. Suthaharan, G.-H. Lee, H.-K. Lee and K.R. Rao designs a joint source and channel coding (JSCC) scheme to maximize the perceptual video quality in a real-time multimedia communication environment. It uses wavelet transform to exploit human visual system's spatial and temporal characteristics of video data. The paper shows by simulation and real video experiments that the proposed scheme yields better
#
1999 Academic Press
294
EDITORIAL
results than other JSCC schemes such as EDF (early deadline ®rst) scheduling algorithm and (m, k) scheduling algorithm. The ®fth paper Comparison of MPEG Domain Elements for Low-Level Shot Boundary-Detection by W.J. Heng, K.N. Ngan and M.H. Lee justi®es the reliability of the three dierent elements (chromatic barycenter, luminance and macroblock size) in the compressed domain used in low-level shot boundary detection. These three elements are extracted from MPEG video for examination. It shows that both macroblock size and luminance elements could be unstable under certain condition and detection in the color domain is essential for accurate shot boundary detection. It also shows that, of all the elements, chromatic barycenter gives the best performance. The sixth paper Neuro-Fuzzy Modeling and Prediction of VBR MPEG Video Sources by B. Qiu, S. Suthaharan and H.R. Wu addresses the neuro-fuzzy modeling and prediction on trac intensity of digital video sources. The authors have considered the video sources that are coded with hybrid motion compensation/dierential pulse code modulation/discrete cosine transform (MC/ DPCM/DCT). The paper discusses the computational advantages of the proposed method and shows it can
achieve multi-step ahead prediction on-line and in realtime without the uses of dedicated hardware. The seventh paper Real-Time VBR Rate Control of MPEG Video based upon Lexicographic Bit Allocation by D.T. Hoang presents a low-complexity algorithm for variable-bit-rate control, suitable for low-delay, realtime applications. The paper shows how the algorithm can be applied either to produce a desired quality level or to meet global bit budget. We would like to thank all the authors for their interest, eort and the high quality research contributions to this issue. We would also like to thank all the referees for their valuable comments and recommendation. Without their support, it would have been impossible to produce such a successful issue. Our special thanks go to Phillip A. Laplante and Alexander D. Stoyen, Editors-in-Chief of Real-Time Imaging, for their support to bringing this special issue into existence. Guest Editors S. Suthaharan, Tennessee State University, USA. S. Sathananthan, Tennessee State University, USA. C. Markhauser, University of Simon Bolivar, Venezuela. L. Guan, University of Sydney, Australia.