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1 视频电视会议发展历程 1964年,贝尔实验室研制出最早的可视电话PicturePhoneMOD-Ⅰ,传送黑白静止硬拷贝图像,图像和话音采用分时传送。上世纪70年代,在匹兹堡和芝加哥间开始用于商业服务,采用PicturePhoneMOD-Ⅱ,提供黑白静止或活动的点对点电视会议业务。80年代,日本制订了可视电话的TTC标准,在模拟电话网
1 video and video conference history In 1964, Bell Labs developed the earliest video phone PicturePhoneMOD-Ⅰ, black and white stationary hardcopy images, images and voice using time-sharing transmission. In the 1970s, Pittsburgh and Chicago began commercial service, using PicturePhoneMOD-II, to provide black-and-white stationary or active point-to-point video conferencing services. In the 1980s, Japan formulated the TTC standard for video telephony over analogue telephone networks