Apparatus and method for effectively inhibiting unauthorized copying of picture signals which does not interfere with an authorized display thereof
US6266480A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91371
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital satellite broadcasting system for providing copy protection or so-called macrovision signals which hinder the recording of designated picture signals and which do not adversely affect the performance of a television receiver. Such satellite broadcasting system may include a broadcasting station, a satellite, and a plurality of satellite receivers each located at a subscriber's premises and coupled to the subscriber's television receiver and recording/reproducing device (VTR). Parameters pertaining to a number of types of television receivers may be transmitted from the satellite broadcasting station by way of the satellite to the satellite receivers. Upon receiving such transmitted parameters, each respective satellite receiver obtains the parameters associated with the respective television. Such obtained parameters are utilized in forming a macrovision signal which is combined with video data and supplied to the respective television receiver. As a result of using parameters associated with the respective television receiver in forming the macrovision signal, the performance of such television receiver is not adversely affected and picture signals of designated programs…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.