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題名 | Video Transcoding for Multipoint Videoconferencing=應用於多點視訊會議之視訊轉換編碼技術 |
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作者 | 林嘉文; 陳永昌; Lin, Chia-wen; Chen, Yung-chang; |
期刊 | 影像與識別 |
出版日期 | 19990300 |
卷期 | 5:1 1999.03[民88.03] |
頁次 | 頁5-19 |
分類號 | 448.88 |
語文 | eng |
關鍵詞 | 多點視訊會議; 視訊轉換編碼技術; |
英文摘要 | Multipoint video conferencing is a natural extension of point-to-point video conferencing. With the rapid growth of video conferencing, the need for multipoint video conferencing is also growing. An MCU is a central server in a wide-area network which is used to coordinate and distribute video and audio streams among multiple participants in a video conference. A video bridge is often used in an MCU to combine the coded video signals from multiple participants into a single video for display. To combine the multiple pre-encoded video sequences into a single sequence, the total bit-rate may overwhelm the outgoing channel bandwidth, thus bit-rate reduction is required. Video transcoding is an efficient way for rate adaptation in networked video applications. Video transcoding can be done in either the pixel domain or the coded domain. Various architecture of single point and multipoint video transcoders are addressed in this article. Their complexities are also discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。