Browsing by Author "Yeh, Che-Hua"

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Motion Manipulation for Characters in Videos
(2015)
Chu, Hung-Kuo
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Yeh, Che-Hua
;
Tang, Nick C.
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Tyan, Hsiao-Rong
;
Wang, Yu-Shuen
Multimedia content creation and manipulation have attracted great attention in recent years due to the popularity of mobile image and video capturing devices. In our daily life, the most common subject appearing in the captured content are people. Hence, to create images and videos by manipulating appearances or motions of the human character inside these media becomes an important research issue. In this paper, we propose a novel idea that requires the fusion of video and audio intelligence. We develop a system whose inputs are a monocular video captured by a stationary RGBD sensor and a music clip. In the context of a human character performing a music conducting motion, the output is a re-targeted video where the motion of performer is manipulated according to the emotional cues extracted from the music clip. To achieve this goal, our system is decomposed into three major stages. First, one needs to access to the geometric and appearance information pertaining to meaningful and representative targets in the video sequence. Second, a systematic way is needed to reliably classify and identify important emotions from the music. Third, to complete the emotion transfer, one has to manipulate the video targets based on the extracted music emotions.
SIP mobility and IPv4/IPv6 dual-stack supports in 3G IP multimedia subsystem
(2006-08-01)
Huang, Shiang-Ming
;
Wu, Quincy
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Lin, Yi-Bing
;
Yeh, Che-Hua
;
資訊工程學系
In the Universal Mobile Telecommunications System (UNITS), session initiation protocol (SIP) and IPv6 are the default protocols for IP multimedia core network subsystem (IMS). However, a user equipment (UE) may not be allowed to roam or hand off from UNITS to a private-lPv4 GPRS network. In this paper, we utilize SIP mobility and an automatic IPv6 tunneling mechanism, called Teredo, to support roaming/handoff of a UE between different networks. We have developed the first non-commercial Linux-based Teredo mechanism, and compared our solution with other Teredo implementations in the public domain. Our study indicates that our solution can reduce the tunneling overhead and transmission delay over two other implementations by 44-74%. Copyright (C) 2006 John Wiley & Sons, Ltd.