公开(公告)号：US5915094A

公开(公告)日：1999-06-22

申请号：US866671

申请日：1997-06-02

申请人： Jack Lawrence Kouloheris ,  Manoj Kumar

发明人： Jack Lawrence Kouloheris ,  Manoj Kumar

IPC分类号： G06F12/00 ,  G06F3/06 ,  G06F13/00 ,  H04H20/76 ,  H04H60/27 ,  H04L12/18 ,  H04N5/765 ,  H04N5/93 ,  H04N7/173 ,  H04N21/2312 ,  H04N21/238 ,  H04N21/262 ,  G06F13/38 ,  G06F15/17

CPC分类号： H04N21/2326 ,  G06F3/0613 ,  G06F3/0659 ,  G06F3/067 ,  G06F3/0689 ,  H04N7/17336

摘要： A method and apparatus for delivering multimedia video data from a server (host processor) to a plurality of clients connected to a communications network. More specifically, with this invention, preprocessed video and multimedia data packets are striped across disks in units of fixed playback time, even if such units result in variable length stripes. To deliver multiple video or continuous media streams, the disks in the array are accessed simultaneously so that at any given instance, different disks are accessing the video or multimedia data for different streams. Access to the disks for reading the continuous media files is scheduled periodically, with the period equal to the back time of the stripes. Because each disk read command retrieves data for a fixed play back time, if the first read command for a continuous media stream request can be scheduled to complete on a disk within a playback time, all subsequent read commands are also guaranteed to not interfere with read commands of other streams. Data is delivered directly from the disk array to the communication network by a stream controller without being sent to the host system. Disk storage is utilized efficiently by allocating disk space in units of cylinders and storing the variable size stripes of video in packed format.

摘要翻译： 一种用于将多媒体视频数据从服务器（主处理器）传送到连接到通信网络的多个客户端的方法和装置。 更具体地说，利用本发明，即使这样的单元导致可变长度的条带，预处理的视频和多媒体数据分组以固定的播放时间为单位在磁盘上条带化。 为了提供多个视频或连续媒体流，阵列中的磁盘被同时访问，使得在任何给定的实例中，不同的磁盘正在访问用于不同流的视频或多媒体数据。 周期性地定期访问用于读取连续媒体文件的磁盘，周期等于条带的后续时间。 由于每个磁盘读取命令检索固定播放时间的数据，如果连续媒体流请求的第一个读取命令可以在播放时间内调度到一个磁盘上完成，所有后续的读取命令也保证不会干扰读取 其他流的命令。 数据通过流控制器直接从磁盘阵列传送到通信网络，而不会发送到主机系统。 通过以圆柱体为单位分配磁盘空间并以压缩格式存储视频的可变大小条带来有效地利用磁盘存储。

公开(公告)号：US06236727B1

公开(公告)日：2001-05-22

申请号：US08881139

申请日：1997-06-24

申请人： Mark Louis Ciacelli ,  John William Urda ,  Wai Man Lam ,  Jack Lawrence Kouloheris ,  John Edward Fetkovich

发明人： Mark Louis Ciacelli ,  John William Urda ,  Wai Man Lam ,  Jack Lawrence Kouloheris ,  John Edward Fetkovich

IPC分类号： H04N7167

CPC分类号： G11B20/0021 ,  G06F21/10 ,  G06F21/72 ,  G06F2211/007 ,  G06F2221/2107 ,  G11B20/00086 ,  G11B20/00224 ,  G11B20/00449 ,  G11B20/00478 ,  G11B20/00507 ,  H04N21/4408

摘要： Apparatus, method and computer program product are provided for digitally processing an encrypted data stream scrambled, for example, according to content scrambling system (CSS) technology. This digital processing insures against communication of clear data within the computer system from a central processing unit (CPU) to any accessible structure, such as memory or a system bus. Descrambling of the (CSS) scrambled data stream occurs within a module executing on the CPU, which is followed by reencryption of the data prior to transfer from the CPU. By so processing the data, integrity of copyrighted material is maintained, while allowing for software descrambling of the CSS encrypted data stream. Various techniques for establishing the encryption/decryption algorithm pair employed are described. Decryption of the re-encrypted data can occur at a receiving software module and/or a receiving hardware device, such as a decoder.

摘要翻译： 提供装置，方法和计算机程序产品，用于数字处理例如根据内容加扰系统（CSS）技术加扰的加密数据流。 该数字处理确保将计算机系统内的清晰数据从中央处理单元（CPU）传送到任何可访问的结构，例如存储器或系统总线。 （CSS）加扰数据流的解扰发生在CPU上执行的模块中，随后在从CPU传送之前重新加密数据。 通过处理数据，维护版权材料的完整性，同时允许CSS加密数据流的软件解扰。 描述了用于建立所使用的加密/解密算法对的各种技术。 重新加密的数据的解密可以在接收软件模块和/或接收硬件设备（诸如解码器）处发生。

公开(公告)号：US6009171A

公开(公告)日：1999-12-28

申请号：US881139

申请日：1997-06-24

申请人： Mark Louis Ciacelli ,  John William Urda ,  Wai Man Lam ,  Jack Lawrence Kouloheris ,  John Edward Fetkovich

发明人： Mark Louis Ciacelli ,  John William Urda ,  Wai Man Lam ,  Jack Lawrence Kouloheris ,  John Edward Fetkovich

摘要： Apparatus, method and computer program product are provided for digitally processing an encrypted data stream scrambled, for example, according to content scrambling system (CSS) technology. This digital processing insures against communication of clear data within the computer system from a central processing unit (CPU) to any accessible structure, such as memory or a system bus. Descrambling of the (CSS) scrambled data stream occurs within a module executing on the CPU, which is followed by re-encryption of the data prior to transfer from the CPU. By so processing the data, integrity of copyrighted material is maintained, while allowing for software descrambling of the CSS encrypted data stream. Various techniques for establishing the encryption/decryption algorithm pair employed are described. Decryption of the re-encrypted data can occur at a receiving software module and/or a receiving hardware device, such as a decoder.