Interactive video/telephone transmission system
Bidirectional unicable switching system
Interactive enquiry system
Interactive cable television system
Television information system
CATV Communication system
Upstream data packet time slot synchronization with downstream VBI for two-way CATV system
Multiple access communication on a CATV reverse channel
Electronic information dissemination system
ApplicationNo. 589205 filed on 09/28/1990
US Classes:725/120, With two-way connection from unit to receiver (e.g., for the purpose of channel selection)347/2, Combined725/109, Having link to external network (e.g., interconnected computer network)725/127, Network component (e.g., filter, tap, splitter, amplifier, repeater, etc.)725/131Receiver (e.g., set-top box)
ExaminersPrimary: Eisenzopf, Reinhard J.
Assistant: Charouel, Lisa
Attorney, Agent or Firm
International ClassesH04N 007/10
AbstractAn interactive videotex system with distributed processing and storage of video picture information in nodes disposed throughout a cable television distribution system. The nodes are coupled to the feeder cable of the cable distribution system. Each node in the system receives a substantially identical copy of the interactive video picture information and related data from a regional processing center. The users at home televisions associated with a particular node interact directly with the video picture information in that node, rather than with the information stored in the regional processing center or some other remote location, which enables the system to quickly display photographic quality images and complex graphics, as well as sound, at the user's televisions in response to commands received by the users.