发明名称 METHOD AND SYSTEM FOR COMMUNICATING VIDEO SIGNALS TO A PLURALITY OF TELEVISION SETS
摘要 A video communications system (10) includes a communications controller (30) that interfaces with a broadband/narrowband network (40) to distribute video signals to a plurality of remote sites (104) in a multi-site location (102). Each remote site (104) includes a channel selector and signalling unit (50) and at least one television set (100). A user enters user input information into a remote selector (70) for processing by the channel selector and signalling unit (50). The channel selector and signal unit (50) sends the user input information to the communication controller (30) over a video signal distribution network (90) at an upstream frequency selected at a user selectable setting (52). The communication controller (30) responds by modulating the desired video information onto a downstream frequency for transmission to the television set (100) on the video signal distribution network (90). Each remote site (104) has a separate upstream frequency and downstream frequency to allow for independent control of each television set (100).
申请公布号 CA2247318(A1) 申请公布日期 1997.08.28
申请号 CA19972247318 申请日期 1997.02.21
申请人 DSC COMMUNICATIONS CORPORATION 发明人 EHRETH, DAVID
分类号 H04N7/173;(IPC1-7):H04N7/173 主分类号 H04N7/173
代理机构 代理人
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