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    Token passing technique for media playback devices
    1.
    发明申请
    Token passing technique for media playback devices 有权
    用于媒体播放设备的令牌传递技术

    公开(公告)号：US20080168568A1

    公开(公告)日：2008-07-10

    申请号：US11651339

    申请日：2007-01-08

    申请人： Rainer Brodersen ,  Jeffrey Robbin ,  Augustin J. Farrugia ,  Rod Schultz

    发明人： Rainer Brodersen ,  Jeffrey Robbin ,  Augustin J. Farrugia ,  Rod Schultz

    IPC分类号： H04L9/12

    CPC分类号： H04N7/1675 ,  G06F21/10 ,  H04N21/4126 ,  H04N21/4405 ,  H04N21/63345 ,  H04N21/8355

    摘要： A digital rights management (DRM) system for distribution of digital content such as audio or video uses a token passing scheme to enhance security of the content from unauthorized access and use, including access by unauthorized players. The token is requested from the central content or DRM server by a host device such as a user's computer, using security related information. The token is then passed to a media player associated with the host device, the token being encrypted using a key special to that particular player. Upon receipt of the token, the player transmits back to the server certain related security information confirming receipt of the token and in return receives keys for decryption of the associated digital content. In the absence of proper passing of the token, player access to the content, or further access to other content, is denied. This also allows the player to communicate directly with the server for obtaining the keys.

    摘要翻译： 用于分发诸如音频或视频的数字内容的数字版权管理（DRM）系统使用令牌传递方案来增强内容的安全性，以防止未经授权的访问和使用，包括未经授权的玩家的访问。 使用安全相关信息由主机设备（诸如用户的计算机）从中央内容或DRM服务器请求令牌。 令牌然后传递给与主机设备相关联的媒体播放器，该令牌使用该特定播放器专用的密钥进行加密。 在接收到令牌时，播放器向服务器发送确认令牌的接收的某些相关安全信息，并且作为回报接收用于解密相关数字内容的密钥。 在没有正确传递令牌的情况下，播放器访问内容或进一步访问其他内容，被拒绝。 这也允许播放器直接与服务器通信以获得密钥。

    Token passing technique for media playback devices
    2.
    发明授权
    Token passing technique for media playback devices 有权
    用于媒体播放设备的令牌传递技术

    公开(公告)号：US07975312B2

    公开(公告)日：2011-07-05

    申请号：US11651339

    申请日：2007-01-08

    申请人： Rainer Broderson ,  Jeffrey Robbin ,  Augustin J. Farrugia ,  Rod Schultz

    发明人： Rainer Broderson ,  Jeffrey Robbin ,  Augustin J. Farrugia ,  Rod Schultz

    IPC分类号： H04L9/12

    CPC分类号： H04N7/1675 ,  G06F21/10 ,  H04N21/4126 ,  H04N21/4405 ,  H04N21/63345 ,  H04N21/8355

    摘要： A digital rights management (DRM) system for distribution of digital content such as audio or video uses a token passing scheme to enhance security of the content from unauthorized access and use, including access by unauthorized players. The token is requested from the central content or DRM server by a host device such as a user's computer, using security related information. The token is then passed to a media player associated with the host device, the token being encrypted using a key special to that particular player. Upon receipt of the token, the player transmits back to the server certain related security information confirming receipt of the token and in return receives keys for decryption of the associated digital content. In the absence of proper passing of the token, player access to the content, or further access to other content, is denied. This also allows the player to communicate directly with the server for obtaining the keys.

    摘要翻译： 用于分发诸如音频或视频的数字内容的数字版权管理（DRM）系统使用令牌传递方案来增强内容的安全性，以防止未经授权的访问和使用，包括未经授权的玩家的访问。 使用安全相关信息由主机设备（诸如用户的计算机）从中央内容或DRM服务器请求令牌。 令牌然后传递给与主机设备相关联的媒体播放器，该令牌使用该特定播放器专用的密钥进行加密。 在接收到令牌时，播放器向服务器发送确认令牌的接收的某些相关安全信息，并且作为回报接收用于解密相关数字内容的密钥。 在没有正确传递令牌的情况下，播放器访问内容或进一步访问其他内容，被拒绝。 这也允许播放器直接与服务器通信以获得密钥。

    Facilitating Random Access In Streaming Content
    7.
    发明申请
    Facilitating Random Access In Streaming Content 审中-公开
    促进随机访问流内容

    公开(公告)号：US20080168516A1

    公开(公告)日：2008-07-10

    申请号：US11621092

    申请日：2007-01-08

    申请人： Christopher Lance Flick ,  David L. Biderman ,  Rainer Brodersen ,  Jeffrey Robbin ,  Eric Taylor Seymour ,  Thomas Michael Madden ,  Tim Bienz

    发明人： Christopher Lance Flick ,  David L. Biderman ,  Rainer Brodersen ,  Jeffrey Robbin ,  Eric Taylor Seymour ,  Thomas Michael Madden ,  Tim Bienz

    IPC分类号： H04N7/173

    CPC分类号： H04L65/4092 ,  H04L67/02 ,  H04L67/06 ,  H04N21/23106 ,  H04N21/232 ,  H04N21/4622 ,  H04N21/47202 ,  H04N21/6125 ,  H04N21/6175 ,  H04N21/6587

    摘要： At least a portion of a media file can be downloaded by accessing one or more items of media data associated with a media file stored on a remote server, wherein the media data includes at least one sample table; receiving input from a user identifying a playback location associated with the media file; determining a plurality of data items required to play at least a portion of the media file from the identified playback location based on the at least one sample table; and transmitting one or more byte-range requests to the remote server using the hypertext transfer protocol to retrieve the plurality of data items. Further, the media file can be progressively downloaded from the identified playback location until the end of the media file is reached, playback of the media file is terminated, or input is received from the user identifying a new playback location.

    摘要翻译： 可以通过访问与存储在远程服务器上的媒体文件相关联的一个或多个媒体数据项来下载媒体文件的至少一部分，其中媒体数据包括至少一个样本表; 从用户接收识别与所述媒体文件相关联的播放位置的输入; 基于所述至少一个样本表，确定从所识别的播放位置播放所述媒体文件的至少一部分所需的多个数据项; 以及使用所述超文本传输​​协议向所述远程服务器发送一个或多个字节范围请求以检索所述多个数据项。 此外，可以从识别的播放位置逐渐下载媒体文件，直到到达媒体文件的结束，媒体文件的播放被终止，或者从用户接收到识别新的播放位置的输入。