2,467 Hits in 4.5 sec

Video coding and ATM statistical bit rate capability [chapter]

L. Casamayou, M. de Oliveira, J. Pechiar, M. Simon
1997 IFIP Advances in Information and Communication Technology  
This paper analyses the adequacy of the statistical bit rate (SBR) A TM transfer capability for supporting real time video services, where end to end delay is limited.  ...  Comparison with other transfer capabilities shows that SBR is outstanding in terms of application performance and network resources required.  ...  bpu(SCR) and bpu(PCR) are bits per video unit at mean and peak rates. • g(n) are the bits generated by nth unit.  ... 
doi:10.1007/978-0-387-35185-8_3 fatcat:kuoflnqihbc3dfnz66e7w4nryy

Smoothing of MPEG multi-program video coding for packet networks [chapter]

Luís Teixeira, Teresa Andrade
1997 Lecture Notes in Computer Science  
It addresses the problem of jointly controlling the channel and several VBR video sources bit rates.  ...  Interframe and intraframe techniques are used resulting in VBR bit streams, if constant quality is aimed. The number of bits depends on the motion and spatial detail of the video sequences.  ...  of bandwidth-on-demand and switching capabilities provided by the ATM technique.  ... 
doi:10.1007/3-540-63508-4_113 fatcat:xjf755mfjzfvtozq6actjinid4

Wireless ATM-based multicode CDMA transport architecture for MPEG-2 video transmission

Po-Rong Chang, Chin-Feng Lin
1999 Proceedings of the IEEE  
The ATM technique is especially well suited for variable bit rate (VBR) MPEG-2 video because of its ability to allocate bandwidth on demand to these services.  ...  On the other hand, the ATM cell payload is encoded for varying degrees of error protection according to both the priority and statistical behavior of the payload data in MPEG-2 videos.  ...  both the priority and statistical behavior of data, data bits of each slice are first packetized in the ATM adaptation layer (AAL), and then packed into the ATM cell according to the outer FEC code combing  ... 
doi:10.1109/5.790639 fatcat:sy7akk57njcghb636exwaibzg4

On the efficiency of statistical—bitrate service for video [chapter]

G. Karlsson, G. Djuknic
1998 Performance of Information and Communication Systems  
In this paper we question the efficiency of statistical bitrate service which is the standardized representation of this operational mode for ATM networks.  ...  The provisioning of quality of service by means of statistical multiplexing has been an alluring research idea for the last decade of teletraffic research.  ...  behavior is not observed for variable bit rate video) [13] .  ... 
doi:10.1007/978-0-387-35355-5_16 fatcat:oqweiynpafcshfluwbwujtdc7m

A Picture Quality Control Framework for MPEG video over ATM [chapter]

Ahmed Mehaoua, Raouf Boutaba, Guy Pujolle
1997 Protocols for High-Speed Networks V  
This paper addresses the problern of transmission of digital Video communications over B-ISDN and provides a solution based on a good knowledge of both video system design and broadband networks capabilities  ...  Our approach overcomes the difficulty imposed by random cell discarding due to the bursty and Variable Bit Ratetransmission nature of compressed video, by using an accurate cell discrimination strategy  ...  These video applications will have sampling dimension up to 176 x 144 x 10Hz and coded bit rates between 4800 and 64,000 bit/s (e.g. video-phony, mobile audiovisual communication, or multimedia electronic  ... 
doi:10.1007/978-0-387-34986-2_4 fatcat:epmulae32fesjgsqtjipkuvhwm

End-to-end modeling and simulation of MPEG-2 transport streams over ATM networks with jitter

Wenwu Zhu, Y.T. Hou, Yao Wang, Ya-Qin Zhang
1998 IEEE transactions on circuits and systems for video technology (Print)  
The probability density function of the interarrival time of the ATM adaptation layer 5 (AAL5) protocol data unit (PDU) is derived from an MPEG-2 video source model and an ATM network jitter model.  ...  In this paper, the operation of MPEG-2 systems is modeled and simulated when an MPEG-2 transport stream is delivered through an ATM network with jitter.  ...  Heyman for the valuable discussion on MPEG-2 video source model, and Dr. A. Reibman for reviewing the draft and contributing constructive critiques.  ... 
doi:10.1109/76.660823 fatcat:2h25h33fa5bs5jpjfp4c2usfci

Asynchronous transfer of video

G. Karlsson
1996 IEEE Communications Magazine  
Brief overviews of video coding, rate control, multiplexing, as well as delay, error and loss control are given.  ...  Sweden Video transfers across IP and ATM networks have received much research attention during the last ten years.  ...  The listed classes are called deterministic bit rate (DBR), statistical bit rate (SBR) (called constant and variable bit rate by the ATM Forum), and unspecified bit rate (UBR).  ... 
doi:10.1109/35.533930 fatcat:xascl3swsfg4xkvjxonbczcony

Neural-network connection-admission control for ATM networks

R.-G. Cheng, C.-J. Chang
1997 IEE Proceedings - Communications  
It diminishes the estimation error of the equivalent-capacity method, due to modelling, approximation and unpredictable statistical fluctuations of the system, by employing the learning capability of a  ...  This is because ATM traffic characteristics are quite diverse, and quality of service (QoS) and bandwidth requirements vary considerably.  ...  Also, the holding times for video, voice, high-bit-rate data and low-bit-rate data are assumed to be exponentially distributed.  ... 
doi:10.1049/ip-com:19971088 fatcat:756sgke5prf7jk5jwxapf2t7ma

Development of Columbia's video on demand testbed

Shih-Fu Chang, Alexandros Eleftheriadis, Dimitris Anastassiou
1996 Signal processing. Image communication  
The first generation of the testbed was based on a constant-bit-rate (CBR) video server utilizing Ethernet delivery. Contents were encoded and stored as MPEG-2 audio/video elementary streams.  ...  (MR) video coding, efficient manipulation of compressed video, and advanced user interfaces.  ...  Javier Zamora is working on packet video over ATM networks and is the author of the MPEG-2/ATM AAL5 adaptation program. Steve Jacobs is responsible for the real-time Video Pump software.  ... 
doi:10.1016/0923-5965(95)00047-x fatcat:jzvbt7sjsneylaw3mku3vpm4da

Design of multicode CDMA systems for 3-D stereoscopic video over wireless ATM networks

Po-Rong Chang, Chin-Feng Lin, M.J. Wu
2000 IEEE Transactions on Vehicular Technology  
However, the rapidly variable bit rate (VBR) characteristics of the MPEG-based 3-D videos seems a weakness to the transmission of such videos via a constant bit-rate (CBR) mobile channel.  ...  The ATM cell header is protected by a relatively powerful FEC code to ensure correct delivery and low cell loss rate (CLR).  ...  The code number assigned to each 3-D video is proportional to the dynamic source bit rate of 3-D video.  ... 
doi:10.1109/25.832965 fatcat:jjrxgcmywvegjgchyta3kzdqzm

Protocol architecture for MPEG-2 video over a high speed network

B. Bouallegue, R. Djemal, H. Guesmi, R. Tourki, J.P. Diguet, J.-L. Philippe
2004 IEE Proceedings - Communications  
Our approach, based on a new MPEG-2 protocol architecture, tries to overcome the difficulty imposed by traditional random cell discarding due to the bursty aspect of the traffic and the variable bit rate  ...  The results show that the proposed interface is effective in solving the cell loss problem and thus enhances the QoS for MPEG-2 video transmission in ATM Networks.  ...  The first one consists of an ATM connection that doesn't exceed its negotiated bit rate.  ... 
doi:10.1049/ip-com:20040357 fatcat:v56yg3lnjrbm3mrgqcynkfzyoa

MPEG-Video Sources in ATM-Systems — A new approach for the dimensioning of policing functions [chapter]

O. Rose, M. Ritter
1995 Local and Metropolitan Communication Systems  
The ATM transport concept of B-ISDN allows for an efficient and flexible use of network resources for variable bit rate services with high transmission rates.  ...  One major traffic source which will make use of this capability will be video and multimedia applications.  ...  The concept of small cells and the asynchronous transfer technology allows for an efficient and flexible use of network resources for Constant Bit Rate (CBR) and Variable Bit Rate (VBR) services as well  ... 
doi:10.1007/978-0-387-34884-1_7 fatcat:sze65kazfbauhbqo344l2qzeka

High performance architecture of integrated protocols for encoded video application

H. Guesmi, R. Djemal, B. Bouallegue, J.-P. Diguet, R. Tourki
2004 Computer Standards & Interfaces  
Our approach tries to overcome the difficulty imposed by traditional random cell discarding due to the bursty aspect of the traffic and the variable bit rate transmission, nature of compressed video.  ...  In this article, we propose the design of an interface between the MPEG-2 standard and the ATM network in order to improve the video visual quality.  ...  When the traffic is bursty and has variable bit rate requirements with high peak rates such as real time variable bit rate (rt-VBR) and available bit rate traffic classes (ABR), congestion may occur even  ... 
doi:10.1016/j.csi.2003.11.006 fatcat:v7u75bcofvchzbumhwqv64lsuq

User-oriented QoS in packet video delivery

O. Verscheure, X. Garcia, G. Karlsson, J.-P. Hubaux
1998 IEEE Network  
In Sec. 2, we summarize video compression, with a focus on MPEG-2. In Sec. 3, we explain how compressed video is conveyed over packet networks e.g. ATM and IP.  ...  We describe how each of the subsystems can be tuned to optimize the quality of the delivered signal, for a given available bit rate in the network. The assessment of end-user quality is not trivial.  ...  and remarks on the paper.  ... 
doi:10.1109/65.752641 fatcat:ltl5bscduva3fiwxdip3hhj4g4

An Mpeg2-to-atm Converter To Optimize Performance Of Vbr Video Broadcast Over Atm Networks

Wong, Leung, Nasiopoulos
1998 International Conference on Consumer Electronics  
It functions as an external post-coding source rate controller between any MPEG2 source (video archives, life programs, etc.) and an ATM network.  ...  For real-time variable bit-rate (rt-VBR) traffic, the key traffic descriptors for UPC are PCR (peak cell rate), MBS (maximum burst size) and SCR (sustainable cell rate).  ...  This MPEG2-to-ATM converter functions as an external post-coding source rate controller between any MPEG2 source (video archives, life programs, etc.) and an ATM network.  ... 
doi:10.1109/icce.1998.678343 fatcat:ogiotn533jeurjbpml5hxggjse
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