| 摘要 |
PURPOSE:To easily interface videotext terminals by dividing a communication line, interfacing the CRTs of the videotex terminals with the aid of signals on said divided line, and limiting to one terminal transmitting an incoming signal among them. CONSTITUTION:Image data transmitted through the communication line 10 is split to m-parts by a signal distributor 3. The divided image data is inputted to the videotex terminals 1a-1m installed far away, demodulated, decoded and converted into analog signals RGB signals, which are inputted to the CRTs 2a-2m and displayed. Here the videotext terminals 1b-1m will not transmit incoming signals (dial signal, terminal response signal, terminal profile, screen request signal, etc.). The device that can transmit the incoming signal is limited to one videotext terminal 1a connected to a keyboard 4. Accordingly, even if the CRTs are far away, they can be easily interfaced.
|
