1·IntroductionIn the communication systems, echo and noise will seriously affect speech communication quality, such as IP telephone, videophone and hand-free digital cell phone systems etc.
引言在通信系统中，例如IP电话、可视电话及免提数字蜂窝电话系统中，回声和噪声会严重影响通信质量。
2·Things like videophone and videoconferencing are usually called video services. This type is also regarded as multimedia services.
比如可视电话、会议电视等，这些被称作视像业务，也叫多媒体业务。
3·It will have a videophone and a holographic computer and will use zero-point technology.
它将是一个拥有可视电话和全息投影的电脑，而且将使用零度科技。
4·People will be able to use the videophone for conferences.
人们将能利用可视电话来开会。
5·The realization of audio and video subsystem in videophone based on PC is introduced in this paper.
本文介绍了基于PC的可视电话音频视频子系统的实现。