System, method and device having teaching and commerce subsystems
US10264325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2016 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Feb 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/643
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A frequency band selection device that can be inserted into a signal transmission line of a CATV system on the premise of a user includes at least two signal path sets between a tap side and a premise side. Each signal path set includes two discrete signal paths, a high frequency signal path for a downstream bandwidth and a low frequency signal path for an upstream bandwidth. The high frequency signal path and the low frequency signal path are separated by a cut-off transition frequency that is different for each signal path set. The device further includes a switch controller having at least two discrete switch positions. The switch controller chooses one of the switch positions as a result of an information signal. Each of the switch positions corresponds to a respective one of the signal path sets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.