发明名称 |
Broadcast 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 |
US7391866(B2) |
申请公布日期 |
2008.06.24 |
申请号 |
US20010023021 |
申请日期 |
2001.12.13 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
FUKAMI YUKIYASU;NAKAHARA TORU;MATSUO TAKASHI;HIGASHI AKIO;MURAKAMI HIROKI |
分类号 |
H04K1/00;H04N5/00;H04N5/76;H04N5/783;H04N7/16;H04N7/167;H04N9/804 |
主分类号 |
H04K1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|