CA2142795A1 - Look-Ahead Scheduling to Support Video-on-Demand Applications - Google Patents

Look-Ahead Scheduling to Support Video-on-Demand Applications

Info

Publication number
CA2142795A1
CA2142795A1 CA2142795A CA2142795A CA2142795A1 CA 2142795 A1 CA2142795 A1 CA 2142795A1 CA 2142795 A CA2142795 A CA 2142795A CA 2142795 A CA2142795 A CA 2142795A CA 2142795 A1 CA2142795 A1 CA 2142795A1
Authority
CA
Canada
Prior art keywords
video
look
viewers
stream
common data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2142795A
Other languages
French (fr)
Other versions
CA2142795C (en
Inventor
Joel L. Wolf
Philip S. Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cisco Technology Inc
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of CA2142795A1 publication Critical patent/CA2142795A1/en
Application granted granted Critical
Publication of CA2142795C publication Critical patent/CA2142795C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17336—Handling of requests in head-ends
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal

Abstract

A system and method of supporting pause-resume in a video-on-demand service of a type which can accommodate multiple viewers sharing a common data stream is described. When a video server receives a performance request from one of the viewers for showing a particular video, it identifies and reserves a look-ahead stream. The look-ahead stream is another video stream which is scheduled to become available after a predetermined time period. When the video is commenced, a common data stream for the video is concurrently transmitted from the video server to reception equipment at the viewers' locations. Transmission of the common data stream causes the particular video to be performed on the viewers' reception equipment. When the video server receives a pause request and then a subsequent resume request from one of the viewers, it transmits the video via the look ahead stream instead of the common data stream.
CA002142795A 1994-03-15 1995-02-17 Look-ahead scheduling to support video-on-demand applications Expired - Lifetime CA2142795C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/213,284 US5461415A (en) 1994-03-15 1994-03-15 Look-ahead scheduling to support video-on-demand applications
US213,284 1994-03-15

Publications (2)

Publication Number Publication Date
CA2142795A1 true CA2142795A1 (en) 1995-09-16
CA2142795C CA2142795C (en) 2000-12-05

Family

ID=22794479

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002142795A Expired - Lifetime CA2142795C (en) 1994-03-15 1995-02-17 Look-ahead scheduling to support video-on-demand applications

Country Status (8)

Country Link
US (1) US5461415A (en)
EP (1) EP0673160B1 (en)
JP (1) JP2742390B2 (en)
KR (1) KR0152486B1 (en)
CN (1) CN1087558C (en)
CA (1) CA2142795C (en)
DE (1) DE69503817T2 (en)
TW (1) TW247388B (en)

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US5461415A (en) 1995-10-24
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TW247388B (en) 1995-05-11
JP2742390B2 (en) 1998-04-22
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DE69503817T2 (en) 1999-04-15
DE69503817D1 (en) 1998-09-10

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