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    • 10. 发明申请
    • APPARATUS AND METHOD FOR EXTRACTING CONDITIONAL ACCESS INTERNAL MESSAGE IN MOBILE MULTIMEDIA BROADCASTING SYSTEM
    • 移动多媒体广播系统中提取条件访问内部消息的设备和方法
    • US20080134230A1
    • 2008-06-05
    • US11928231
    • 2007-10-30
    • Jin-Kyu KimBon-Tae KooNak-Woong Eum
    • Jin-Kyu KimBon-Tae KooNak-Woong Eum
    • H04N7/16
    • H04N7/163H04N21/26606H04N21/4623
    • Provided is an apparatus and method for extracting a conditional access internal message which can efficiently extract a conditional access internal message including an entitlement control message (ECM)/entitlement management message (EMM) without fast information channel (FIC) of a digital multimedia broadcasting (DMB) frame in a mobile multimedia broadcasting system. The conditional access internal message extracting apparatus includes: a sub-channel data extracting unit for extract sub-channel data associated with conditional access from a mobile multimedia broadcasting signal; a sub-channel prefix header analyzing unit configured to extract sub-channel prefix length information from a sub-channel prefix length field of the sub-channel data, and extract start position information of a conditional access internal message from the sub-channel; and a sub-channel prefix data processor configured to extract the conditional access internal message from the sub-channel data by using the sub-channel prefix length information and the start position information of the conditional access internal message.
    • 提供了一种用于提取条件访问内部消息的装置和方法,其可以有效地提取包括授权控制消息(ECM)/授权管理消息(EMM)的条件访问内部消息,而不需要数字多媒体广播的快速信息信道(FIC) DMB)帧在移动多媒体广播系统中。 条件访问内部消息提取装置包括:子信道数据提取单元,用于从移动多媒体广播信号中提取与条件访问相关联的子信道数据; 子信道前缀标题分析单元,被配置为从子信道数据的子信道前缀长度字段提取子信道前缀长度信息,并从子信道提取条件访问内部消息的开始位置信息; 以及子信道前缀数据处理器,被配置为通过使用子信道前缀长度信息和条件访问内部消息的开始位置信息从子信道数据中提取条件访问内部消息。