公开(公告)号：US4995071A

公开(公告)日：1991-02-19

申请号：US359028

申请日：1989-05-30

申请人： Jens Weber ,  Rolf Loos

发明人： Jens Weber ,  Rolf Loos

IPC分类号： H04M3/56 ,  H04N7/15

CPC分类号： H04M3/56 ,  H04N7/15 ,  H04M3/567

摘要： A video conference installation has transmission and reception devices for handling audio and video signals from a plurality of subscriber points via a shared processor which assigns individual subscriber units to the subscriber points. A digital communication system connects subscriber telephone sets (F) to the shared processor via subscriber circuits (AL) having two utility channels and a signalling channel. Audio is pulse code modulated for transmission over one utility channel and compressed video is transmitted over the other. Each subscriber point has a video monitor (B) and video camera (K). Control symbols (SS, SY) are displayed on the subscriber's monitor via an overlay generator (OG). The subscriber can initiate control and switching actions by pointing to displayed symbols on the screen using a cursor, light pen or position sensitive screen input.

摘要翻译： 视频会议设备具有用于经由共享处理器处理来自多个用户点的音频和视频信号的发送和接收设备，该共享处理器将各个用户单元分配给用户点。 数字通信系统经由具有两个效用信道和信令信道的用户电路（AL）将用户电话机（F）连接到共享处理器。 音频被脉冲编码调制，用于通过一个公用通道进行传输，压缩视频通过另一个传送。 每个用户点具有视频监视器（B）和摄像机（K）。 控制符号（SS，SY）通过覆盖发生器（OG）显示在用户的监视器上。 用户可以通过使用光标，光笔或位置敏感屏幕输入来指向屏幕上显示的符号来启动控制和切换动作。