Conversational video system having contact selection control
US4531184A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1983 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Mar 30, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/1804
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A video conversational data communication network (30) in which subscribers (34, 36) may conduct conversational video textual data communications with one or more keystations (70, 602, 98) in the network (30). Each keystation (70, 602, 98) is associated with a keystation terminal controller interface (68, 96, 600) which is in turn connected to a message switching node (32) for routing calls throughout the network (30). The keystation controller interface (68, 96, 600) locally stores (304, 306) video conversational textual data for its associated keystations (70, 82, 84, 98, 100, 602) and enables two different designated keystations to conduct two different video conversations with a common keystation in a split screen display (76). The split screen display (76) may also be used to display retrievable data from a data base (50, 52) for simultaneous display (76) along with a video conversation. The video conversational textual data is transmitted between connected keystation controller interfaces (96, 602) in packets which contain less than the total displayable data content of the conversational video textual data message input via the keyboard (72). The keystation controller interf…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.