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Video data streamer for simultaneously conveying same one or different ones of data blocks stored in storage node to each of plurality of communication nodes

Patent 5712976 Issued on January 27, 1998. Estimated Expiration Date: Icon_subject January 27, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Interconnection method for digital multimedia communications
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Inventors

Application

No. 302624 filed on 09/08/1994

US Classes:

725/115, Data storage or retrieval709/231, Computer-to-computer data streaming725/114Server or headend

Examiners

Primary: Meky, Moustafa M.

Attorney, Agent or Firm

Foreign Patent References

  • 0529-864-A1 EP. 03/21/1993
  • WO93/16557 WO. 08/21/1993

International Class

G06F 013/00

Abstract

A media streamer (10) includes at least one storage node (16) including mass storage for storing a digital representation of at least one video presentation. The mass storage is comprised of a plurality of mass storage units. The at least one video presentation requires a time T to present in its entirety, and is stored as a plurality of N data blocks. Each data block stores data corresponding to approximately a T/N period of the video presentation. The media streamer further includes 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 which transmit a digital representation as a data stream to a consumer of the digital representation. The N data blocks of the digital representation are partitioned into X stripes, wherein data blocks 1, X+1, 2*X+1, . . . etc., are associated with a first one of the X stripes, data blocks 2, X+2, 2*X+2, . . . etc., are associated with a second one of the X stripes, etc., and wherein individual ones of the X stripes are each stored on a different one of the plurality of mass storage units. The plurality of mass storage units preferably store a single copy of a digital representation of a video presentation. The X stripes are read out in such a manner as to enable a plurality of data streams to simultaneously convey a same one of the N data blocks, or are read out in such a manner as to enable a plurality of data streams to simultaneously convey a different one of the N data blocks.

Other References

  • "Intel Scalable Multi-server Technology for Interactive Multimedia Applications" May, 1994, 1994 Intel Corporation, pp. 3-15
  • "Architectures for Video Servers" by Manu Thapar and Bill Koerner, Hewlett Packard, 1994 NCTA Technical Papers, pp. 141-148
  • ALLICAT (0664) S10 SCSI Direct Access Storage Device Functional Specification Release 4.50, Document No. AS01-0003-00, Formatted on May 6, 1993 IBM Corporation, pp. 1-291
  • Hosekote et al, "Scheduling continous media in a video-on-demand server", IEEE, pp. 19-28, 1994
  • Kim, Michelle, "Synchronized Disk Interleaving", IEEE, pp.978-988, Nov. 1986
  • Rangan et al, "Designing File Systems for Digital Video and Audio", ACM Press, pp.91-104, Oct. 13, 199
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