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    Proximity detection employed in connection with rights management system or the like
    4.
    发明申请
    Proximity detection employed in connection with rights management system or the like 有权
    与权利管理系统等有关的接近检测

    公开(公告)号：US20050262022A1

    公开(公告)日：2005-11-24

    申请号：US11139951

    申请日：2005-05-27

    申请人： Eduardo Oliveira ,  James Alkove ,  Richard Prologo ,  Troy Batterberry ,  Anand Paka

    发明人： Eduardo Oliveira ,  James Alkove ,  Richard Prologo ,  Troy Batterberry ,  Anand Paka

    IPC分类号： G06F21/24 ,  G06F21/00 ,  G06Q30/00 ,  G06Q50/00 ,  H04L9/08 ,  G06F17/60

    CPC分类号： G06F21/10 ,  G06F2221/2111

    摘要： A sink sends a registration request to a source and the source validates same, and the source sends a registration response including a secret to the sink. The source then sends a proximity message including a nonce to the sink and concurrently notes a start time. The sink employs the secret and the nonce to generate a proximity value and sends same to the sources. The source receives the proximity value and concurrently notes an end time, verifies the proximity value based on the secret and the nonce, calculates from the noted start and end times an elapsed time, compares the elapsed time to a predetermined threshold value, decides from the comparison whether the sink satisfies the proximity requirement, and registers the sink as being able to access content from such source if the sink satisfies the proximity requirement.

    摘要翻译： 一个宿发送一个注册请求到一个源，并且该源验证相同，并且该源向该宿发送一个包括秘密的注册响应。 然后，源向接收器发送包括随机数的接近消息，同时注释开始时间。 宿使用秘密和随机数生成邻近值，并将其发送到源。 源接收邻近值并且同时记录结束时间，基于秘密和随机数验证接近值，从所记录的开始和结束时间计算经过时间，将经过的时间与预定阈值进行比较，从 比较宿是否满足接近要求，并且如果宿满足接近要求，则将宿注册为能够从这样的源访问内容。

    Methods and systems for self-describing multicasting of multimedia presentations
    8.
    发明申请
    Methods and systems for self-describing multicasting of multimedia presentations 有权
    用于自我描述多媒体演示的组播的方法和系统

    公开(公告)号：US20050089035A1

    公开(公告)日：2005-04-28

    申请号：US10693430

    申请日：2003-10-24

    申请人： Anders Klemets ,  Eduardo Oliveira ,  James Alkove

    发明人： Anders Klemets ,  Eduardo Oliveira ,  James Alkove

    IPC分类号： G06F17/30 ,  H04L12/18 ,  H04L29/06 ,  H04M3/487 ,  H04M7/00 ,  H04L12/56

    CPC分类号： H04L65/4076 ,  H04L12/1895 ,  H04L29/06027 ,  H04L65/4015 ,  H04L65/607 ,  H04L65/608 ,  H04M7/006 ,  H04N21/23439 ,  H04N21/44004 ,  H04N21/6405 ,  H04N21/643 ,  H04N21/6437

    摘要： Multimedia presentations are multicast using an announcement channel that includes presentation description information along with multiple channels for multiple streams of multimedia data to accommodate clients of different multimedia resources. Clients can use the announcement channel to select channel(s) appropriate for their multimedia resources. The channels are created in a predetermined manner (e.g., preselected logical addresses, preselected ports of an IP address, etc.) so that clients can immediately join a channel without (or concurrently with) joining the announcement channel to reduce startup latency. An acceleration channel may be created that provides blocks of data containing a preselected number of previous units, which may be transmitted at at a bit rate that is “faster than real-time”. This feature allows clients with suitable resources to more quickly buffer sufficient data to begin presenting the multimedia data to users.

    摘要翻译： 多媒体演示是使用包括演示描述信息以及多个多媒体数据流的多个频道的通知信道来组播的，以适应不同多媒体资源的客户端。 客户可以使用通知通道选择适合其多媒体资源的频道。 以预定方式（例如，预先选择的逻辑地址，IP地址的预选端口等）创建信道，使得客户端可以在不（或同时）加入通告信道的情况下立即加入信道以减少启动等待时间。 可以创建加速度通道，其提供包含预选数量的先前单元的数据块，其可以以“比实时更快”的比特率发送。 该功能允许具有适当资源的客户端更快速地缓冲足够的数据，以开始向用户呈现多媒体数据。

    Encryption scheme for streamed multimedia content protected by rights management system
    9.
    发明申请
    Encryption scheme for streamed multimedia content protected by rights management system 有权
    受权限管理系统保护的流式多媒体内容加密方案

    公开(公告)号：US20060280301A1

    公开(公告)日：2006-12-14

    申请号：US11139956

    申请日：2005-05-27

    申请人： Eduardo Oliveira ,  Geoffrey Dunbar ,  James Alkove

    发明人： Eduardo Oliveira ,  Geoffrey Dunbar ,  James Alkove

    IPC分类号： H04N7/167

    CPC分类号： H04N7/1675 ,  H04N21/2347 ,  H04N21/4405 ,  H04N21/835 ,  H04N21/8456

    摘要： A stream of content has multiple sub-streams, where each sub-stream comprises a part of the content and is divisible into logical blocks bounded by intrinsic partitions. For each sub-stream, a specification of the logical blocks bounded by the intrinsic partitions is defined and the sub-stream is divided into the logical blocks bounded by the intrinsic partitions. Each divided logical block is encrypted and then divided into one or more portions to produce corresponding pieces of data, and each piece of data is placed into a data packet as a payload thereof. Each data packet is transmitted to a recipient thereof, and the recipient can retrieve the pieces of data from the payloads of the packets, reconstruct the encrypted logical blocks, and manipulate the sub-stream on a per-logical block basis without necessarily decrypting each encrypted logical block.

    摘要翻译： 内容流具有多个子流，其中每个子流包括内容的一部分，并且可以被分为由固有分区界定的逻辑块。 对于每个子流，定义由固有分区界定的逻辑块的规范，并且子流被划分为由固有分区界定的逻辑块。 每个划分的逻辑块被加密，然后被分成一个或多个部分以产生相应的数据段，并且每个数据片段被作为其有效载荷被放置在数据分组中。 每个数据分组被发送到其接收者，并且接收者可以从分组的有效载荷中检索数据片段，重构加密的逻辑块，并且以每个逻辑块为基础来操纵子流，而不必解密每个加密的 逻辑块。

    Delivering policy updates for protected content
    10.
    发明申请
    Delivering policy updates for protected content 有权
    为受保护的内容提供策略更新

    公开(公告)号：US20070014413A1

    公开(公告)日：2007-01-18

    申请号：US11179206

    申请日：2005-07-12

    申请人： Eduardo Oliveira ,  James Alkove ,  Anders Klemets

    发明人： Eduardo Oliveira ,  James Alkove ,  Anders Klemets

    IPC分类号： H04L9/00

    CPC分类号： H04L9/0822 ,  G06F21/10 ,  H04L9/0825 ,  H04L63/06 ,  H04L63/102 ,  H04L2209/603 ,  H04L2463/062

    摘要： Various embodiments permit policy updates, such as DRM policy updates, to be delivered and updated for a given piece of protected content. In at least some embodiments, various protocols can be extended to permit policy updates to be represented and carried by the protocol. In one embodiment, Hypertext Transport Protocol or HTTP is utilized to carry the policy updates. In another embodiment, Real Time Streaming Protocol or RTSP is used to carry policy updates.

    摘要翻译： 各种实施例允许针对给定的受保护内容片段进行策略更新（如DRM策略更新）被传递和更新。 在至少一些实施例中，可以扩展各种协议以允许由协议来表示和携带策略更新。 在一个实施例中，使用超文本传输​​协议或HTTP来承载策略更新。 在另一实施例中，实时流协议或RTSP用于携带策略更新。