公开(公告)号：US06959090B1

公开(公告)日：2005-10-25

申请号：US09718024

申请日：2000-11-20

申请人： Jukka Alve ,  Jan Mårtensson ,  Ola Lidholm ,  Valtteri Niemi ,  Juha Tomberg ,  Pasi Kärkäs ,  Harri Pekonen ,  Rami Suominen

发明人： Jukka Alve ,  Jan Mårtensson ,  Ola Lidholm ,  Valtteri Niemi ,  Juha Tomberg ,  Pasi Kärkäs ,  Harri Pekonen ,  Rami Suominen

IPC分类号： G06F12/14 ,  G06F21/10 ,  G06F21/62 ,  G09C1/00 ,  G11B20/10 ,  H04L9/10 ,  H04N5/781 ,  H04N5/85 ,  H04N5/91 ,  H04N5/913 ,  H04N21/433 ,  H04N21/4408 ,  H04N21/4623 ,  H04N21/4627 ,  H04L9/00 ,  H04L9/32

CPC分类号： H04N21/4334 ,  G11B20/0021 ,  G11B20/00246 ,  H04N5/781 ,  H04N5/85 ,  H04N5/913 ,  H04N21/4408 ,  H04N21/4623 ,  H04N21/4627 ,  H04N2005/91364

摘要： A recording device for digital data streams, such as digital TV broadcasts or digitized music, stores copies of program content encrypted by a key unique to the recording device. Distribution of program content is thus discouraged, since intelligible playback of program content would not be obtained on another recording device, which would have a different key. To reduce manufacturing complexity which would result from requiring all bits of a key to inhere in hardware, a first portion of the key inheres in hardware and a second portion is selected from among several candidates residing in a memory device, the key being determined by combining the first and second portions according to predetermined rules. The second portion is reselected at predetermined intervals from among the candidates. Only payload portions of packets are encrypted while header portions are left in the clear in order to facilitate ancillary functions of recorder such as fast forward, fast rewind, and program search.

摘要翻译： 用于诸如数字电视广播或数字化音乐的数字数据流的记录装置存储通过记录装置唯一的键加密的节目内容的副本。 因此节目内容的分发因此不鼓励，因为在具有不同密钥的另一记录设备上将不能获得节目内容的可理解的重放。 为了降低由于要求硬件中的所有位的所有位产生的制造复杂性，在硬件中的第一部分密钥和第二部分从驻留在存储器件中的几个候选中选出，该密钥通过组合确定 第一和第二部分。 第二部分以候选者之间的预定间隔被重新选择。 为了促进记录器的辅助功能，例如快进，快退和程序搜索，仅封包的有效载荷部分被加密，而标题部分保持清晰。

公开(公告)号：US06728241B2

公开(公告)日：2004-04-27

申请号：US10083795

申请日：2002-02-27

申请人： Tomi Hakkarainen ,  Pasi Kärkäs ,  Harri Pekonen

发明人： Tomi Hakkarainen ,  Pasi Kärkäs ,  Harri Pekonen

IPC分类号： H04L1228

CPC分类号： H04N21/235 ,  H04L12/18 ,  H04N21/434 ,  H04N21/435 ,  H04N21/4385

摘要： The present invention provides methods and apparatus for filtering a broadcast data stream that can support data flow, e.g. IPv6 packets. The present invention utilizes common filtering for packet segments that are common among IPv6 packets. Segments that are not common are separately filtered. A set of rules is applied to the filtered segments in order to determine whether corresponding packets should be subsequently processed. The present invention is applicable to numerous application including MPEG multicast services.

公开(公告)号：US07924827B2

公开(公告)日：2011-04-12

申请号：US10818542

申请日：2004-04-05

申请人： Tomi Hakkarainen ,  Pasi Kärkäs ,  Harri Pekonen

发明人： Tomi Hakkarainen ,  Pasi Kärkäs ,  Harri Pekonen

IPC分类号： H04L12/28

CPC分类号： H04N21/235 ,  H04L12/18 ,  H04N21/434 ,  H04N21/435 ,  H04N21/4385

摘要： The present invention provides methods and apparatus for filtering a broadcast data stream that can support data flow, e.g. IPv6 packets. The present invention utilizes common filtering for packet segments that are common among IPv6 packets. Segments that are not common are separately filtered. A set of rules is applied to the filtered segments in order to determine whether corresponding packets should be subsequently processed. The present invention is applicable to numerous application including MPEG multicast services.

摘要翻译： 本发明提供了用于过滤可以支持数据流的广播数据流的方法和装置，例如， IPv6报文 本发明利用IPv6分组中常见的分组段的公共过滤。 不常见的细分被单独过滤。 一组规则被应用于过滤的段，以便确定是否应该随后处理相应的分组。 本发明适用于包括MPEG多播服务在内的众多应用。