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1. 发明授权

US5761417A Video data streamer having scheduler for scheduling read request for individual data buffers associated with output ports of communication node to one storage node 失效
公开(公告)号：US5761417A
公开(公告)日：1998-06-02
申请号：US302626
申请日：1994-09-08
申请人： Martha R. Henley , James Christopher Wyllie , Ashok Raj Saxena
发明人： Martha R. Henley , James Christopher Wyllie , Ashok Raj Saxena
IPC分类号： H04N5/93 , G06F3/06 , G06F12/00 , H04L29/06 , H04N5/765 , H04N7/16 , H04N7/173 , H04N21/2183 , H04N21/238 , H04N21/262 , G06F13/00
CPC分类号： G06F3/061 , G06F3/0656 , G06F3/0659 , G06F3/0689 , H04L29/06
摘要： A media streamer (10) includes at least one storage node (16, 17) comprising mass storage for storing a digital representation of at least one video presentation; and a plurality of communication nodes (14) each having at least one input port that is coupled to an output of the at least one storage node for receiving a digital representation of a video presentation therefrom. Each of the plurality of communication nodes further includes a plurality of output ports, individual ones of the plurality of output ports being operable for transmitting a digital representation as a data stream to a consumer of the digital representation. Individual ones of the output ports also have an associated data buffer for buffering a portion of a digital representation prior to a transmission of the digital representation. Each of the plurality of communication nodes further includes a scheduler for scheduling, for individual ones of the data buffers, a read request to the at least one storage node for a next sequential portion of the digital representation for storage within individual ones of the data buffers. Each read request for a particular individual one of the data buffers is scheduled at a predetermined time such that a requested next sequential portion of the digital representation is available to a requesting communications node prior to a time that the requested next sequential portion is required to be transmitted from the output port that is associated with the data buffer for which the read request was scheduled. The at least one storage node further includes a scheduler for scheduling a read request to the mass storage such that a next sequential portion of a digital representation is available for outputting, prior to the at least one storage node receiving a read request for the next sequential portion from one of the communication nodes.

2. 发明授权

US5586264A Video optimized media streamer with cache management 失效
标题翻译：具有缓存管理功能的视频优化媒体流媒体
公开(公告)号：US5586264A
公开(公告)日：1996-12-17
申请号：US302619
申请日：1994-09-08
申请人： William R. Belknap , Martha R. Henley , Lorenzo Falcon, Jr. , Thomas E. Frayne , Mei-Lan Luo , Ashok R. Saxena
发明人： William R. Belknap , Martha R. Henley , Lorenzo Falcon, Jr. , Thomas E. Frayne , Mei-Lan Luo , Ashok R. Saxena
IPC分类号： G06F12/08 , G06F3/06 , G06F12/00 , G06F17/30 , H04N7/14 , G06F15/00
CPC分类号： G06F3/0601 , G06F12/0866 , G06F2003/0691 , G06F2003/0692
摘要： A data storage system includes a mass storage unit storing a data entity, such as a digital representation of a video presentation, that is partitioned into a plurality N of temporally-ordered segments. A data buffer is bidirectionally coupled to the mass storage unit for storing up to M of the temporally-ordered segments, wherein M is less than N. The data buffer has an output for outputting stored ones of the temporally-ordered segments. The data storage system further includes a data buffer manager for scheduling transfers of individual ones of the temporally-ordered segments between the mass storage unit and the data buffer. The data buffer manager schedules the transfers in accordance with at least a predicted time that an individual one of the temporally-ordered segments will be required to be output from the data buffer. When employed with a media streamer (10) distributed data buffer management techniques are employed for selecting blocks to be retained in a buffer memory, either in a storage node (16, 17) or in a communication node (14). These techniques rely on the predictable nature of the video data stream, and thus are enabled to predict the future requirements for a given one of the data blocks.
摘要翻译：数据存储系统包括存储数据实体（例如，视频呈现的数字表示）的大容量存储单元，其被划分为多个N个时间有序的段。数据缓冲器双向耦合到大容量存储单元，用于存储多达M个时间有序的段，其中M小于N.数据缓冲器具有用于输出存储的时间有序段的输出。数据存储系统还包括数据缓冲器管理器，用于调度大容量存储单元和数据缓冲器之间的时间有序的段中的各个的传输。数据缓冲器管理器根据至少需要从数据缓冲器输出时间有序的段的个体的预测时间来调度传输。当采用媒体流分送器（10）时，采用分布式数据缓冲器管理技术来选择要存储在存储节点（16,17）或通信节点（14）中的缓冲存储器中的块。这些技术依赖于视频数据流的可预测性质，因此能够预测给定的一个数据块的未来需求。

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