Socio-technical aspects of video phones

Vikram Chandrasekaran, Siva Dantu, Priyanka Kadiyala, R. Dantu, S. Phithakkitnukoon
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引用次数: 4

Abstract

The widespread use of voice over Internet protocol has paved the way for video over Internet protocol. In the past, certain technical shortcomings have prevented the popularity of videophones in the market. With present-day technology, videophones have just about everything required for day-to-day functions. Under such circumstances, certain socio-technical aspects require attention so that videophones can become as widespread and as technically streamlined as a plain old telephone system (POTS) with its additional benefits. A frequently brushed-upon topic is optimum features in the video phone for day-to-day social interactions. We carried out several experiments on different kinds of codecs and video formats to address two issues: i) the size of a video screen and ii) perception of motion and distance. From the measurements, we observed that a small frame rate with low bandwidth is adequate and can result in satisfactory video quality. We also observed that H263 performs well for all the day-to-day social networking activities. Standing 4 feet from the camera can still give reasonably good video quality in the currently available codecs. We believe that socio-technical issues will emerge more clearly over the next several years and they are germane to deployment of PC-based soft phones as well as hard phones.
视频电话的社会技术方面
基于互联网协议的语音的广泛使用为基于互联网协议的视频铺平了道路。过去,某些技术缺陷阻碍了可视电话在市场上的普及。在当今的技术下,可视电话几乎具备了日常功能所需的一切。在这种情况下,需要注意某些社会技术方面的问题,以便可视电话能够像普通的老式电话系统(POTS)一样普及,并在技术上得到简化,同时还具有其他好处。一个经常被提及的话题是视频电话日常社交互动的最佳功能。我们针对不同类型的编解码器和视频格式进行了几个实验,以解决两个问题:i)视频屏幕的大小和ii)运动和距离的感知。从测量中,我们观察到低带宽下的小帧率就足够了,可以产生令人满意的视频质量。我们还观察到,H263在所有日常社交网络活动中表现良好。在目前可用的编解码器中,站在距离摄像机4英尺的地方仍然可以提供相当好的视频质量。我们认为,社会技术问题将在未来几年更加明显地出现,它们与基于pc的软电话和硬电话的部署密切相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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