Video network system with computer LAN
US5365264A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1991 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Nov 29, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/147
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bi-directional video signal transmission system is equipped with transmission lines having coupled upsteam and downstream segments. With the entire band of a RF signal being taken as a modulation frequency band, an image signal modulated to a frequency band and RF-multiplexed in the upstream segment is introduced into the downstream segment at the modulated frequency and is then branched to demodulate the same frequency band, thereby obtain one video signal transmission channel. In response to a request by a subscriber, a channel management section assigns and releases the transmission channels and further outputs a control command whereby a transceiver control section performs switching-control of the transmission frequencies to transceiver units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.