发明名称 Broardcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list
摘要 A reception apparatus includes: a reception unit for receiving the scrambled content, the scrambled content being scrambled so that a predetermined unit of scrambled content is descrambled using a descrambling key corresponding to the predetermined unit of scrambled content, and at least one piece of storage information in which a list including all descrambling keys used for descrambling the scrambled content is embedded; storage unit for storing the received scrambled content and the storage information; list extraction unit for extracting the list from the stored storage information; descramble processing unit for extracting the predetermined unit of scrambled content from the stored scrambled content, extracting a descrambling key corresponding to the predetermined unit of scrambled content from the extracted list, and descrambling the extracted predetermined unit of scrambled content using the extracted descrambling key; and reproduction unit for reproducing the predetermined unit of descrambled content in the descrambled order.
申请公布号 US2002080971(A1) 申请公布日期 2002.06.27
申请号 US20010023021 申请日期 2001.12.13
申请人 FUKAMI YUKIYASU;NAKAHARA TORU;MATSUO TAKASHI;HIGASHI AKIO;MURAKAMI HIROKI 发明人 FUKAMI YUKIYASU;NAKAHARA TORU;MATSUO TAKASHI;HIGASHI AKIO;MURAKAMI HIROKI
分类号 H04N5/00;H04N5/76;H04N5/783;H04N7/16;H04N7/167;H04N9/804;(IPC1-7):H04L9/00 主分类号 H04N5/00
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