Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026669
H. Narayanan, K. Rao
Images with rapid motion are more or less degraded at low bit rate transmission. Hence a motion compensation technique is implemented to improve the coding efficiency. Performance in terms of bit rate is compared between motion compensated and nonmotion-compensated multimode video coding. Multimode video coding optimizes the tradeoff between the conflicting objectives of high compression ratio and error resilience.
{"title":"Motion compensated multimode video coding for noisy channels","authors":"H. Narayanan, K. Rao","doi":"10.1109/VIPROM.2002.1026669","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026669","url":null,"abstract":"Images with rapid motion are more or less degraded at low bit rate transmission. Hence a motion compensation technique is implemented to improve the coding efficiency. Performance in terms of bit rate is compared between motion compensated and nonmotion-compensated multimode video coding. Multimode video coding optimizes the tradeoff between the conflicting objectives of high compression ratio and error resilience.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121291441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026702
R. Basić, M. Močinić
Although the electronic program guide (EPG) is not any more a "novelty" there are still different concepts about the applications and technical implementation of EPG. Such variations raises not only the question of compatibility between different vendors of EPG systems, but cause confusion to consumers: which system is most suitable to viewers and what are the criteria for suitability of an iTV-EPG system (containing EPG) for viewers. Some of the offered or proposed EPGs are reviewed. By marking their outstanding properties we have presented some EPG core features, important to users. We also give some opinions about the form and type of EPG "content" delivered to users and the functionality of the GUI (graphic user interface).
{"title":"User's requirements for electronic program guide (EPG) in interactive television (iTV)","authors":"R. Basić, M. Močinić","doi":"10.1109/VIPROM.2002.1026702","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026702","url":null,"abstract":"Although the electronic program guide (EPG) is not any more a \"novelty\" there are still different concepts about the applications and technical implementation of EPG. Such variations raises not only the question of compatibility between different vendors of EPG systems, but cause confusion to consumers: which system is most suitable to viewers and what are the criteria for suitability of an iTV-EPG system (containing EPG) for viewers. Some of the offered or proposed EPGs are reviewed. By marking their outstanding properties we have presented some EPG core features, important to users. We also give some opinions about the form and type of EPG \"content\" delivered to users and the functionality of the GUI (graphic user interface).","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122522995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026697
A. Smolic
This paper presents an algorithm for generation of 360/spl deg/ panoramic views from consumer video sequences. The robust approach considers the limited quality and the various distortions that such material usually contains. In a first stage the focal length of the camera is estimated from estimated warping parameters of the planar perspective motion model. Then the images are projected onto a cylinder surface and the amount of rotation of each image is estimated using a gradient descent algorithm. The presented results prove the suitability and accuracy of the algorithm.
{"title":"Robust generation of 360/spl deg/ panoramic views from consumer video sequences","authors":"A. Smolic","doi":"10.1109/VIPROM.2002.1026697","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026697","url":null,"abstract":"This paper presents an algorithm for generation of 360/spl deg/ panoramic views from consumer video sequences. The robust approach considers the limited quality and the various distortions that such material usually contains. In a first stage the focal length of the camera is estimated from estimated warping parameters of the planar perspective motion model. Then the images are projected onto a cylinder surface and the amount of rotation of each image is estimated using a gradient descent algorithm. The presented results prove the suitability and accuracy of the algorithm.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122202674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026701
R. Rodríguez, A. Gil, A. Fernandez, R. Díaz, M. Fernandez, J. García
We present superficially a software tool - a DVB-MHP (digital video broadcasting multimedia home platform) compliant transport stream generator /sub e/signed to be part of the testbed of an MHP decoder prototype. The tool was implemented partially making use of XML technology and the software reuse philosophy (freely-distributed parsers and tools) that, in a sense, goes with this special syntax.
{"title":"DVB-MHP transport stream generator","authors":"R. Rodríguez, A. Gil, A. Fernandez, R. Díaz, M. Fernandez, J. García","doi":"10.1109/VIPROM.2002.1026701","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026701","url":null,"abstract":"We present superficially a software tool - a DVB-MHP (digital video broadcasting multimedia home platform) compliant transport stream generator /sub e/signed to be part of the testbed of an MHP decoder prototype. The tool was implemented partially making use of XML technology and the software reuse philosophy (freely-distributed parsers and tools) that, in a sense, goes with this special syntax.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130210284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026661
L. Konyha, S. Tran, K. Fazekas, A. Gschwindt
The work explains the way we deploy the wavelet transform in the object-based video codec scheme proposed in our previous research (see Tran, S.M. et al., J. Commun. and IT Sciences Association, vol.LVI, no.4, 2001). Video objects are first extracted from a conventional frame-based video sequence. By representing the video objects of interest with the so-called constrained Delaunay mesh structures, we could transmit their shapes and patterns in an efficient way: mesh-nodes are tracked forward to reconstruct their new position and therefore their shape at the latter time point; the pattern of the mesh is predicted from the dense field of backward motion vectors, then they are compensated with residual errors for a "perfect" reconstruction. In the current work, the wavelet transform is applied to encode residual errors, the most bit-consuming information. Thanks to the multiresolution character of the wavelet transform, which leads to superior energy compaction and perceptual quality of the decompressed residual errors, the method surpasses the compression offered by the block-DCT in the initial phase. The overall performance of the full scheme is encouraging.
{"title":"Deployment of wavelet transform to VOP codec scheme","authors":"L. Konyha, S. Tran, K. Fazekas, A. Gschwindt","doi":"10.1109/VIPROM.2002.1026661","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026661","url":null,"abstract":"The work explains the way we deploy the wavelet transform in the object-based video codec scheme proposed in our previous research (see Tran, S.M. et al., J. Commun. and IT Sciences Association, vol.LVI, no.4, 2001). Video objects are first extracted from a conventional frame-based video sequence. By representing the video objects of interest with the so-called constrained Delaunay mesh structures, we could transmit their shapes and patterns in an efficient way: mesh-nodes are tracked forward to reconstruct their new position and therefore their shape at the latter time point; the pattern of the mesh is predicted from the dense field of backward motion vectors, then they are compensated with residual errors for a \"perfect\" reconstruction. In the current work, the wavelet transform is applied to encode residual errors, the most bit-consuming information. Thanks to the multiresolution character of the wavelet transform, which leads to superior energy compaction and perceptual quality of the decompressed residual errors, the method surpasses the compression offered by the block-DCT in the initial phase. The overall performance of the full scheme is encouraging.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130408351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026636
R. Trobec, R. Novak, S. Plevel, I. Zupan, M. Zupancic
The system described is based on the wavelet video compression/decompression method, implemented on a single board and tailored for real-time work. Different bit-rates are supported in the full-duplex mode and in the range from 8-50 Mbit/s. The specific solution of the internal DMA transfer between the compressor/decompressor and the transmission FIFO buffers is described. Some considerations on the constant bit-rate implementation are given. An example for a live video transmission on an SDH loop is shown.
{"title":"Single-board wavelet video compression/decompression unit","authors":"R. Trobec, R. Novak, S. Plevel, I. Zupan, M. Zupancic","doi":"10.1109/VIPROM.2002.1026636","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026636","url":null,"abstract":"The system described is based on the wavelet video compression/decompression method, implemented on a single board and tailored for real-time work. Different bit-rates are supported in the full-duplex mode and in the range from 8-50 Mbit/s. The specific solution of the internal DMA transfer between the compressor/decompressor and the transmission FIFO buffers is described. Some considerations on the constant bit-rate implementation are given. An example for a live video transmission on an SDH loop is shown.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123680162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026656
M. Mrak, M. Grgic, S. Grgic
Streaming video over packet networks is considered a joint source/channel coding problem, where the necessity of real-time delivery, bandwidth constraints, and error resilience determine the design parameters for the video transmission system. The objective of video coding for network applications is changed to optimising the video quality over a given bit rate range instead of at a given bit rate. Meeting bandwidth requirements and maintaining acceptable image quality simultaneously is a challenge. This paper provides an overview of scalable video coding methods.
{"title":"Scalable video coding in network applications","authors":"M. Mrak, M. Grgic, S. Grgic","doi":"10.1109/VIPROM.2002.1026656","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026656","url":null,"abstract":"Streaming video over packet networks is considered a joint source/channel coding problem, where the necessity of real-time delivery, bandwidth constraints, and error resilience determine the design parameters for the video transmission system. The objective of video coding for network applications is changed to optimising the video quality over a given bit rate range instead of at a given bit rate. Meeting bandwidth requirements and maintaining acceptable image quality simultaneously is a challenge. This paper provides an overview of scalable video coding methods.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124160458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026645
J. Sobecki
In the paper a concept for adaptive construction of the user interfaces of multiplatform hypermedia applications is presented. The user interface is becoming the crucial element of every information system and as the users as well as platforms are very differentiated it is difficult to construct a single equally efficient interface for all of these cases. Adaptive interfaces with social perspective could offer a possible solution to this problem.
{"title":"Adaptive interface for hypermedia applications","authors":"J. Sobecki","doi":"10.1109/VIPROM.2002.1026645","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026645","url":null,"abstract":"In the paper a concept for adaptive construction of the user interfaces of multiplatform hypermedia applications is presented. The user interface is becoming the crucial element of every information system and as the users as well as platforms are very differentiated it is difficult to construct a single equally efficient interface for all of these cases. Adaptive interfaces with social perspective could offer a possible solution to this problem.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"167 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124660616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-11-07DOI: 10.1109/VIPROM.2002.1026688
I. Kotuliak, T. Atmaca, P. Podhradský
In this paper, we provide a simulation-based study on the performance of the synchronous all-optical packet switch especially the impact of the contention resolution mechanism on the PLR in the synchronous all-optical network.
本文对同步全光分组交换机的性能进行了仿真研究，重点研究了同步全光网络中争用解决机制对PLR的影响。
{"title":"Performance of the all-optical packet switch in the WAN and MAN networks","authors":"I. Kotuliak, T. Atmaca, P. Podhradský","doi":"10.1109/VIPROM.2002.1026688","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026688","url":null,"abstract":"In this paper, we provide a simulation-based study on the performance of the synchronous all-optical packet switch especially the impact of the contention resolution mechanism on the PLR in the synchronous all-optical network.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114959858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-06-16DOI: 10.1109/VIPROM.2002.1026696
J. Stergar, B. Horvat
In the paper we discuss and present a multimedia tutorial covering approaches in digital video implementation into an authoring tool based on time line authoring. First a short overview of the authoring approaches is presented in the introduction. Then, briefly some technological aspects of analog and digital video are discussed The main topic is discussed afterwards based on the time line authoring tool Director. We emphasize the benefits of using time line based authoring environments compared to other authoring tools. Also approaches in implementing new video technologies in such a multimedia-authoring environment are briefly presented.
{"title":"Implementing digital video into time line based authoring environments","authors":"J. Stergar, B. Horvat","doi":"10.1109/VIPROM.2002.1026696","DOIUrl":"https://doi.org/10.1109/VIPROM.2002.1026696","url":null,"abstract":"In the paper we discuss and present a multimedia tutorial covering approaches in digital video implementation into an authoring tool based on time line authoring. First a short overview of the authoring approaches is presented in the introduction. Then, briefly some technological aspects of analog and digital video are discussed The main topic is discussed afterwards based on the time line authoring tool Director. We emphasize the benefits of using time line based authoring environments compared to other authoring tools. Also approaches in implementing new video technologies in such a multimedia-authoring environment are briefly presented.","PeriodicalId":223771,"journal":{"name":"International Symposium on VIPromCom Video/Image Processing and Multimedia Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133300142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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