发明授权
US5915094A Disk access method for delivering multimedia and video information on
demand over wide area networks
失效
用于在广域网上按需传送多媒体和视频信息的磁盘访问方法
- 专利标题: Disk access method for delivering multimedia and video information on demand over wide area networks
- 专利标题(中): 用于在广域网上按需传送多媒体和视频信息的磁盘访问方法
-
申请号: US866671申请日: 1997-06-02
-
公开(公告)号: US5915094A公开(公告)日: 1999-06-22
- 发明人: Jack Lawrence Kouloheris , Manoj Kumar
- 申请人: Jack Lawrence Kouloheris , Manoj Kumar
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: G06F12/00
- 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
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.
公开/授权文献
- US4679963A Playground construction 公开/授权日:1987-07-14
信息查询