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    Protecting elementary stream content
    11.
    发明申请
    Protecting elementary stream content 审中-公开
    保护基本流内容

    公开(公告)号：US20060184790A1

    公开(公告)日：2006-08-17

    申请号：US11202828

    申请日：2005-08-12

    申请人： Eduardo Oliveira ,  Anders Klemets ,  Gurpratap Virdi ,  Thaddeus Pritchett

    发明人： Eduardo Oliveira ,  Anders Klemets ,  Gurpratap Virdi ,  Thaddeus Pritchett

    IPC分类号： H04L9/00

    CPC分类号： H04H60/14 ,  H04L9/065 ,  H04L63/04 ,  H04L2209/12 ,  H04N7/1675 ,  H04N21/234327 ,  H04N21/23476 ,  H04N21/44055 ,  H04N21/835

    摘要： Protecting elementary stream media content is described. In one aspect, Media Access Units (MAUs) of elementary stream content are identified. Each MAU includes one or more data segments representing a single video or audio frame. Encryption boundaries are selected for each MAU. The encryption boundaries are based on one or more data segments associated with the respective MAU. Portions of each MAU are encrypted based on corresponding encryption boundaries. Each MAU is mapped to a MAU Payload Format. The MAU Payload Format allows a media consumer to process each elementary stream associated with the elementary stream content independent of any different elementary stream. The MAU Payload Format also allows a media consumer to process each MAU in an elementary stream independent of any other MAU.

    摘要翻译： 描述保护基本流媒体内容。 在一个方面，识别基本流内容的媒体访问单元（MAU）。 每个MAU包括表示单个视频或音频帧的一个或多个数据段。 为每个MAU选择加密边界。 加密边界基于与各个MAU相关联的一个或多个数据段。 每个MAU的部分基于对应的加密边界进行加密。 每个MAU被映射到MAU有效载荷格式。 MAU有效载荷格式允许媒体消费者处理与基本流内容相关联的每个基本流，独立于任何不同的基本流。 MAU有效载荷格式还允许媒体消费者以独立于任何其他MAU的基本流来处理每个MAU。

    Caching control for streaming media
    12.
    发明申请
    Caching control for streaming media 审中-公开
    流媒体缓存控制

    公开(公告)号：US20060053253A1

    公开(公告)日：2006-03-09

    申请号：US11263717

    申请日：2005-11-01

    申请人： David Roth ,  Eduardo Oliveira ,  Anders Klemets

    发明人： David Roth ,  Eduardo Oliveira ,  Anders Klemets

    IPC分类号： G06F12/14

    CPC分类号： H04L65/605 ,  H04L29/06027 ,  H04L65/4084 ,  H04L67/2804 ,  H04L67/2852 ,  H04L67/2871 ,  H04L69/329

    摘要： Improved caching control for streaming media includes one or more cache control directives associated with streaming media content that can be used by a source of the streaming media content to identify how caching proxy servers are to handle the streaming media content. Upon receipt of the streaming media content, the caching proxy servers handle the content as indicated by the cache control directive(s).

    摘要翻译： 用于流媒体的改进的高速缓存控制包括与流媒体内容相关联的一个或多个高速缓存控制指令，该流媒体内容可由流媒体内容的来源用于识别代理服务器如何处理流媒体内容。 在接收到流媒体内容之后，高速缓存代理服务器处理由高速缓存控制指令指示的内容。

    Methods and systems for self-describing multicasting of multimedia presentations
    14.
    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。

    Remotely accessing protected files via streaming
    16.
    发明申请
    Remotely accessing protected files via streaming 有权
    通过流式传输远程访问受保护的文件

    公开(公告)号：US20070039055A1

    公开(公告)日：2007-02-15

    申请号：US11201531

    申请日：2005-08-11

    申请人： Daniel Plastina ,  Eduardo Oliveira ,  James Dooley ,  James Walter ,  Jason Flaks ,  Sanjay Bhatt ,  William Schiefelbein

    发明人： Daniel Plastina ,  Eduardo Oliveira ,  James Dooley ,  James Walter ,  Jason Flaks ,  Sanjay Bhatt ,  William Schiefelbein

    IPC分类号： H04N7/16

    CPC分类号： H04N7/173 ,  G06F17/30017 ,  G06F21/10 ,  H04L63/0435 ,  H04N21/25875 ,  H04N21/4143 ,  H04N21/4788 ,  H04N21/6408 ,  H04N21/835 ,  H04N21/8355

    摘要： A source device permits a user of a remote device to access a protected file on the source device when the user of the remote device has a right to access the protected file. The user locates the protected file on the source device using the remote device and accesses the protected file using a media player on the remote device. The media player constructs a path by which the source device streams the protected file. The remote device responds to an authentication request from the source device that the user of the remote device has a right to access the protected file. The user is authenticated to confirm that the user of the remote device has a right to access the protected file. The protected file is streamed to the remote device via a path constructed by the remote device.

    摘要翻译： 当远程设备的用户有权访问受保护的文件时，源设备允许远程设备的用户访问源设备上的受保护文件。 用户使用远程设备定位源设备上的受保护文件，并使用远程设备上的媒体播放器访问受保护的文件。 媒体播放器构建源设备流保护文件的路径。 远程设备响应来自源设备的认证请求，远程设备的用户有权访问受保护的文件。 验证用户以确认远程设备的用户有权访问受保护的文件。 受保护的文件通过由远程设备构建的路径流传输到远程设备。

    Encryption scheme for streamed multimedia content protected by rights management system
    17.
    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。

    Rights management system for streamed multimedia content
    18.
    发明申请
    Rights management system for streamed multimedia content 有权
    流媒体内容的权限管理系统

    公开(公告)号：US20060239451A1

    公开(公告)日：2006-10-26

    申请号：US11112325

    申请日：2005-04-22

    申请人： Brian Evans ,  Clifford Strom ,  Daniel Rosenstein ,  Anand Paka ,  Nicholas Fang ,  Eduardo Oliveira

    发明人： Brian Evans ,  Clifford Strom ,  Daniel Rosenstein ,  Anand Paka ,  Nicholas Fang ,  Eduardo Oliveira

    IPC分类号： H04L9/00

    CPC分类号： G06F21/10 ,  H04N21/26613 ,  H04N21/43615 ,  H04N21/4405 ,  H04N21/4408 ,  H04N21/63345 ,  H04N21/8355

    摘要： A sequence of content keys are shared between a receiver of pieces of digital content and a computing device upon which the content is to be rendered. The receiver encrypts each piece of content according to a corresponding content key in the sequence and forwards the encrypted content to the computing device and the computing device decrypts the encrypted content according to the corresponding content key. The receiver initially transmits to the computing device an initialization digital license with an initial content key (CK0) therein. Each of the receiver and the computing device derive a new content key (CKx) in the sequence from the initial content key (CK(0)) in the sequence on an as-needed basis and in a coordinated fashion. The initialization license is required only once for the sequence of content keys, and the receiver need not explicitly communicate (CKx) to the computing device for each piece of content.

    摘要翻译： 一系列内容密钥在数字内容片段的接收机和要在其上呈现内容的计算装置之间共享。 接收机根据序列中的对应的内容密钥加密每条内容，并将加密的内容转发到计算设备，并且计算设备根据相应的内容密钥解密加密的内容。 接收机最初向计算设备发送其中具有初始内容密钥（CK 0）的初始化数字许可证。 接收器和计算装置中的每个接收器和计算装置根据需要的基础和以协调的方式从序列中的初始内容密钥（CK（0））中得到新的内容密钥（CKx）。 对于内容密钥的序列，初始化许可证仅需要一次，并且接收器不需要为每个内容显式地通信（CKx）到计算设备。