[[alternative]]Establishing a Web-based Video System for Telecare

[[abstract]]本研究建立一個透過視訊進行遠距關懷之系統，讓老年人能和親友、醫護人員於排定之影音會談室裡進行即時的雙向溝通，藉由視訊來關懷老年人生活情形，克服距離障礙。遠距視訊關懷系統以網頁為基礎建置而成，一般能連上網際網路的電腦都有安裝含 Flash Player 的瀏覽器，不需要再安裝其他軟體或外掛程式即可使用本系統。本系統主要分為網頁管理與影音會談室兩部份，網頁管理部份負責基本個人資料與行事曆排程之管理，影音會談室需透過行事曆排程後方可使用。影音會談室透過視訊設備，可將使用者的視訊與聲音傳送至伺服器端，再將影像回傳至與會的用戶端。於影音會談時，也可藉由影像圖片共享之電子白板功能來解說各類影像圖片。本系統提供多人影音會談與影音錄製、擷圖服務，並具有影像圖片共享與電子白板繪圖之功能，讓老年人於會談時，可看見醫護人員於電子白板即時解說病癥，減少往返醫療院所的需求。在有線與無線網路環境下測試，本系統視訊畫面清晰程度都在可辨識範圍，音訊聽取上則有99%以上的正確率，因此不同網路環境皆可適用本系統。影像圖片的共享操作，如縮放、標記等等，其反應時間都在數秒內，具有即時分享的實用性。[[abstract]]An online video system for telecare is established in this study. The elderly, their families, their care givers, and the medical staff can have real-time two-way communication at scheduled time using this system. Care is provided to the elderly through video service of this system, without the distance limitation. It is a web-based system. All personal computers and devices installed with web browser and Flash player can access this system. There is no additional software or plug-ins needed. The system is mainly divided into two parts: website management sub-system and video-conferencing room. The former part takes charge of the management of users’ personal data and event scheduling. The video-conferencing room can only be used as a scheduled event. The video and audio data from the users are transmitted to Flash Media Server through video-conferencing room, and then sent to the users. The video-conferencing room is also featured with electronic whiteboard. Users who join the same conferencing room may share images to facilitate discussion. Video conferencing among multiusers can be conducted and the video/audio data can be recorded using this system. Electronic whiteboard with marking and enlarging tools is also provided in the system. Medical staff may use the whiteboard to explain disease to the elderly in video-conferencing, thus reduce the elderly’s need of visiting clinics. Various tests were done under wired and wireless network environments. Video data in the tests were all recognizable. Audio data in the tests all had recognition rate higher than 99%. Therefore, this system can be used in either wired or wireless environment. In whiteboard manipulation, such as marking and enlarging the shared image, response time is within seconds. These show the practicality of the system