Conditional access method and DMB system for regionally limiting DMB reception
US7587168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2006 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Oct 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/51
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital multimedia broadcasting (DMB) system and conditional access method for regionally limiting DMB reception. A DMB station collects information about location of a DMB receiving terminal when a broadcast channel with regional conditional access features is being broadcast. According to the current location of a DMB receiving terminal, the DMB station checks subscribers whose reception of the broadcast channel with the regional conditional reception features is limited. The DMB station includes reception restriction information for limiting the reception of the broadcast channel in subscriber entitlement information of subscribers. The DMB receiving terminal descrambles and outputs a transport stream (TS) packet of the broadcast channel according to the received subscriber entitlement information. Therefore, the reception of a specific broadcast channel can be limited according to location of a user of the DMB receiving terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.