Cloud transcoder: bridging the format and resolution gap between internet videos and mobile devices
Cloud transcoder: bridging the format and resolution gap between internet videos and mobile devices
复制标题
DOI：
10.1145/2229087.2229097
复制
发表时间：
2012-06
期刊：
影响因子：
--
通讯作者：
Zhenhua Li;Yan Huang;Gang Liu;Fuchen Wang;Zhi-Li Zhang;Yafei Dai
中科院分区：
文献类型：
--
作者：
Zhenhua Li;Yan Huang;Gang Liu;Fuchen Wang;Zhi-Li Zhang;Yafei Dai
尽管互联网视频流越来越受欢迎，但移动设备上的视频流仍然具有挑战性。特别是互联网视频与移动设备之间存在格式和分辨率的“差距”，因此移动用户对视频转码的要求很高，以方便他们的特定设备。然而，视频转码作为一项计算密集型工作，受到移动设备电池容量有限的极大挑战。在本文中，我们提出并实现了“云转码器”，它利用一个中间的云平台，通过其独特而实用的设计来弥合“鸿沟”。具体来说，Cloud Transcoder只需要用户上传视频请求，而不是视频内容。在获得视频请求后，Cloud Transcoder从互联网上下载原始视频，根据用户的需求进行转码，并通过云内数据传输加速将转码后的视频以高数据速率传回给用户。因此，移动设备只在最后一步——从云端快速检索转码视频——中消耗能量。我们实际部署系统的运行日志证实了Cloud Transcoder的有效性。
Despite the increasing popularity, Internet video streaming to mobile devices is still challenging. In particular, there has been a format and resolution "gap" between Internet videos and mobile devices, so mobile users have high demand on video transcoding to facilitate their specific devices. However, as a computation-intensive work, video transcoding is greatly challenged by the limited battery capacity of mobile devices. In this paper we propose and implement "Cloud Transcoder", which utilizes an intermediate cloud platform to bridge the "gap" via its special and practical designs. Specifically, Cloud Transcoder only requires the user to upload a video request rather than the video content. After getting the video request, Cloud Transcoder downloads the original video from the Internet, transcodes it on the user's demand, and transfers the transcoded video back to the user with a high data rate via the intra-cloud data transfer acceleration. Therefore, the mobile device only consumes energy in the last step - fast retrieving the transcoded video from the cloud. Running logs of our real-deployed system confirm the efficacy of Cloud Transcoder.