Location detector for digital cable television appliances
US7644424B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 21, 2005 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Apr 4, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4882
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of auditing operation of a cable television appliance consistent with certain embodiments involves detecting an event that triggers an audit; generating a fingerprint value, wherein the fingerprint value is function of the cable television network characteristics at an authorized installation location; comparing the fingerprint value with a stored reference value; if the fingerprint value is within specified limits of the stored reference value, permitting the cable television appliance to carry out a normal operational function; and if the fingerprint value is outside of specified limits of the stored reference value, inhibiting the cable television appliance from carrying out a normal operational function. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.