Ninth IEEE International Symposium on Multimedia (ISM 2007)最新文献

Summarization of Wearable Videos Based on User Activity Analysis 基于用户活动分析的可穿戴视频总结

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.16

R. Katpelly, Tiecheng Liu, Chin-Tser Huang

引用次数: 0

A General Scheme for Extracting QR Code from a Non-uniform Background in Camera Phones and Applications 一种从照相手机和应用程序的非均匀背景中提取QR码的通用方案

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.26

Yu-Hsuan Chang, Chung-Hua Chu, Ming-Syan Chen

引用次数: 66

A Staggered FEC System for Seamless Handoff in Wireless LANs: Implementation Experience and Experimental Study 无线局域网中用于无缝切换的交错FEC系统:实现经验与实验研究

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.29

Hang Liu, Mingquan Wu, Dekai Li, S. Mathur, K. Ramaswamy, Liqiao Han, D. Raychaudhuri

{"title":"A Staggered FEC System for Seamless Handoff in Wireless LANs: Implementation Experience and Experimental Study","authors":"Hang Liu, Mingquan Wu, Dekai Li, S. Mathur, K. Ramaswamy, Liqiao Han, D. Raychaudhuri","doi":"10.1109/ISM.2007.29","DOIUrl":"https://doi.org/10.1109/ISM.2007.29","url":null,"abstract":"We report the implementation experience and experimental evaluation of a staggered adaptive forward error correction (FEC) system for video multicast over wireless LANs. In the system, the parity packets generated by a cross-packet FEC code are transmitted at a time delay from the original video packets, i.e. staggercasting video stream and FEC stream in different multicast groups. The delay provides temporal diversity to improve the robustness of video multicast, especially to enable the clients to correct burst packet loss using FEC and to achieve seamless handoff. A wireless client dynamically joins the FEC multicast groups based upon its channel conditions and handoff events. We have implemented the system including the streaming server and client proxy. A novel software architecture is designed to integrate the FEC functionality in the clients without requirement for changing the existing video player software. We conduct extensive experiments to investigate the impact of FEC overhead and the delay between the video stream and FEC stream to the video quality under different interference levels and mobile handoff durations. The efficacy of staggered adaptive FEC system on improving video multicast quality is demonstrated in real system implementation.","PeriodicalId":129680,"journal":{"name":"Ninth IEEE International Symposium on Multimedia (ISM 2007)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127159368","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}

引用次数: 10

Analysis of a New Ubiquitous Multimodal Multimedia Computing System 一种新型泛在多模态多媒体计算系统分析

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.45

A. Ramdane-Cherif, M. D. Hina, C. Tadj, N. Lévy

引用次数: 4

A Temporal UID Matrix Strategy for Indexing Video Databases 视频数据库索引的时间UID矩阵策略

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.9

Ye-In Chang, Wei-Horng Yeh, Jiun-Rung Chen, Youcheng Chen

引用次数: 1

Event-Based Segmentation of Sports Video Using Motion Entropy 基于运动熵的运动视频事件分割

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.17

Chen-Yu Chen, Jia-Ching Wang, Jhing-Fa Wang, Y. Hu

引用次数: 10

Optimizing Cache Performance of the Discrete Wavelet Transform Using a Visualization Tool 使用可视化工具优化离散小波变换的缓存性能

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.12

J. Tao, A. Shahbahrami, B. Juurlink, R. Buchty, Wolfgang Karl, S. Vassiliadis

{"title":"Optimizing Cache Performance of the Discrete Wavelet Transform Using a Visualization Tool","authors":"J. Tao, A. Shahbahrami, B. Juurlink, R. Buchty, Wolfgang Karl, S. Vassiliadis","doi":"10.1109/ISM.2007.12","DOIUrl":"https://doi.org/10.1109/ISM.2007.12","url":null,"abstract":"The 2D DWT consists of two 1D DWT in both directions: horizontal filtering processes the rows followed by vertical filtering processes the columns. It is well known that a straightforward implementation of the vertical filtering shows quite different performance with various working set sizes. The only reasonable explanation for this has to be the access behavior of the cache memory. As known, vertical filtering has mapping conflicts in the cache with a working set size that is power of two. However, it is not clear how this conflict forms and whether cache problems exist with other data sizes. Such knowledge is the base for efficient code optimization. In order to acquire this knowledge and to achieve more accurate optimization potentials, we apply a cache visualization tool to examine the runtime cache activities of the vertical implementation. We find that besides mapping conflicts, vertical filtering also shows a large number of capacity misses. More specifically, the visualization tool allows us to detect the parameters related to the strategies. This guarantees the feasibility of the optimization. Our initial experimental results on several different architectures show an up to 215% gain in execution time compared to an already optimized baseline implementation.","PeriodicalId":129680,"journal":{"name":"Ninth IEEE International Symposium on Multimedia (ISM 2007)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129966630","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}

引用次数: 14

Realistic Character Motion Response in Computer Fighting Game 电脑格斗游戏中的逼真人物动作反应

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.30

Huai-Che Lee, C. Chang, Jui-Shiang Chao, Wei-Te Lin

引用次数: 5

RISA: A Real-Time Interactive Shadow Avatar RISA:一个实时互动的影子化身

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.47

Yangmi Lim, Jinsu Kim, Jinseok Chae

{"title":"RISA: A Real-Time Interactive Shadow Avatar","authors":"Yangmi Lim, Jinsu Kim, Jinseok Chae","doi":"10.1109/ISM.2007.47","DOIUrl":"https://doi.org/10.1109/ISM.2007.47","url":null,"abstract":"As Webcams become an important factor in the PC environment, many camera-based communication techniques have been developed. Among them, gesture-based communication is attracting attention. In this paper, we propose a real-time interactive shadow avatar (RISA) which can express facial emotions by changing as response to the user's gestures. The avatar's shape is a virtual shadow constructed from a real-time sampled picture of user's shape. Several predefined facial animations overlap on the face area of the virtual shadow, according to the types of hand gestures. We use the background subtraction method to separate the virtual shadow, and a simplified region-based tracking method is adopted for tracking hand positions and detecting hand gestures. In order to achieve a smooth change of emotions, we use a refined morphing method which uses many more frames in contrast to traditional dynamic emoticons. Through our experiments, we found that in the cases where there was enough distance between a camera and a user, the accuracy was higher than in the cases where the distance between them was very close. We have found RISA to be very useful in simple online chatting and PC game environments and it was also highlighted in a real media art exhibition.","PeriodicalId":129680,"journal":{"name":"Ninth IEEE International Symposium on Multimedia (ISM 2007)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126264060","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}

引用次数: 0

Scratch Line Removal on Aged Films 旧胶片上划痕线的去除

Ninth IEEE International Symposium on Multimedia (ISM 2007) Pub Date : 2007-12-10 DOI: 10.1109/ISM.2007.20

Yang-Ta Kao, T. Shih, Hsing-Ying Zhong, Liang-Kuang Dai

引用次数: 4