Determining HDCP source KSV support
US8411851B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2010 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Feb 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4367
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Presented is a method for determining the maximum number of key selection vectors (KSVs) supported by an HDCP source. The method includes transmitting a number of KSVs to the HDCP source, determining whether the HDCP source has entered a failure mode in response to the transmitted number of KSVs, increasing or decreasing the number of KSVs in response to the HDCP source not entering or entering the failure mode, transmitting the increased or decreased number of KSVs to the HDCP source, determining whether the HDCP source has entered the failure mode in response to the transmitted increased or decreased number of KSVs, and repeating the increasing, decreasing, and determining steps until the difference between a lowest number of transmitted KSVs resulting in the HDCP source entering the failure mode and a highest number of transmitted KSVs resulting in the HDCP source not entering the failure mode is one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.