+

WO1999035660A1 - Utilisation partagee de train de donnees video - Google Patents

Utilisation partagee de train de donnees video Download PDF

Info

Publication number
WO1999035660A1
WO1999035660A1 PCT/US1999/000501 US9900501W WO9935660A1 WO 1999035660 A1 WO1999035660 A1 WO 1999035660A1 US 9900501 W US9900501 W US 9900501W WO 9935660 A1 WO9935660 A1 WO 9935660A1
Authority
WO
WIPO (PCT)
Prior art keywords
video
users
subgroup
demand
motion
Prior art date
Application number
PCT/US1999/000501
Other languages
English (en)
Inventor
Winston W. Hodge
Original Assignee
Streamgate, Inc.
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 Streamgate, Inc. filed Critical Streamgate, Inc.
Priority to AU22193/99A priority Critical patent/AU2219399A/en
Publication of WO1999035660A1 publication Critical patent/WO1999035660A1/fr

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
    • H04N7/17318—Direct or substantially direct transmission and handling of requests

Definitions

  • the present invention relates to distribution of information either through broadcasting transmission over a local or wide area network, e.g., the Internet, or using cable video systems. More particularly, the invention provides a technique, including a method and apparatus, for scheduling distribution of video/audio information so as to maximize viewer ship of the same and, therefore, profits.
  • Fig. 1 shows the major components of a video on demand service.
  • the video programs, such as movies are typically stored in one of various formats at a central server 10.
  • Subscribers 12 submits requests to the server 10 for particular programs over a communications network 14.
  • the communications network 14 may use any transmission medium, e.g. commercial telephone, cable and satellite networks.
  • server 10 retrieves the video program from mass storage and delivers a data stream, corresponding to the frames of the movie, to the requesting subscriber via distribution network 14.
  • the data stream is directed to a receiver possessed by the subscriber which converts the data stream into signals necessary for playback and viewing of the movie.
  • VMC Video Motion Control
  • VMC features typically include functions such as pause, fast forward, forward scan, reverse and reverse scan. Additional enhancements made possible via digital VMC implementation could include scene and chapter searches, searches for specific content, content related shopping and research, and other database type functions.
  • conventional video-on-demand conventionally known as true video on demand, dedicates a single session or communication pathway between the viewer and his movie.
  • the communication pathway typically consists of dedicated video streams from a recording medium, such as a disk, dedicated communications channels, switching infrastructure, local neighborhood nodes, and set top boxes, disposed proximate to the local neighborhood nodes.
  • Customer profiles are developed for the recipient describing how important certain characteristics of the broadcast video program, movie or other data are to each customer. From these profiles, an "agreement matrix" is calculated by comparing the recipient's profiles to the actual profiles of the characteristics of the available video programs, movies or other data.
  • U.S. Pat. No. 5,594,491 to Hodge et al. discloses a system and method for distributing video over ADSL telephone lines.
  • Hodge et al. advocate implementing a Near-Video-On Demand (NVOD) protocol.
  • NVOD Near-Video-On Demand
  • the NVOD protocol maps a video program onto disk- drive in an interleaved fashion so that the video program is divided into data packets having a plurality of frames with each pair of adjacent frames corresponding to a pair of frames in a viewing sequence displaced from one another by a predetermined number of frames. Mapping the video frames in this manner renders the system compatible with existing video distribution systems, while maximizing the number of users that may access any given program.
  • U.S. Pat. No. 5,172,413 to Bradley et al. describes, in pertinent part, use of a central electronic library to store and deliver high-demand entertainment programming to local community electronic libraries that channel the programming to subscribers.
  • Low-demand programming is stored and delivered directly from a local community electronic library located in an area in which there may be a special interest in the programming. In this manner, Bradley et al. maximize access capacity while minimizing investment cost.
  • U.S. Pat. No. 5,421,031 to De Bey describes, in pertinent part, a video- on-demand system in which a video program disposed on a non- volatile storage device in divided into a plurality of segments.
  • the segments are transmitted to each subscriber as a redundant sequence.
  • the sequence is transmitted in accordance with a scheduling algorithm that ensures all the video segments of the video program are received by the subscriber to enable continuous playback in real-time of the video program.
  • the segments typically correspond to a non-contiguous sequence of video frames.
  • the receiver possessed by the subscriber, includes a buffer having sufficient memory to store a sufficient amount of video segments to ensure the subscriber experiences real-time playback of the video program.
  • the present invention provides a method and apparatus to allow multiple users to share a common stream of video information which providing each user the ability to have video-motion-control without interrupting the video program material viewed by the remaining users sharing the stream of video information Also included is a method and apparatus to maximize the availability of video information in a given video content library which minimizing the storage media required to store the video information contained therein.
  • FIG. 1 is a simplified block diagram of a prior art video-on-demand distribution system
  • Fig. 2 is a simplified block diagram of a multi-session video-on-demand architecture
  • Fig. 3 is a table demonstrating the increase in users per channel employing stream sharing using the architecture shown above in Fig. 2;
  • Fig. 4 is a graphical representation showing a comparison of the efficiency between single-session video-demand architecture vs. multi-session video-on-demand architecture;
  • Fig. 5 is a graph depicting possible statistical viewing assumptions in accord with the present invention.
  • Fig. 6 is a graphical representation of contractual constraints which are quantified and operated on by the management workstation of Fig. 2;
  • Fig. 7 is a multiple adaptive threshold element for automatic shelf space allocation, in accord with the present invention
  • Fig. 8 is a block diagram showing an all demand video architecture in accord with the present invention.
  • Fig. 9 is a graph showing the different video distribution techniques that may be achieved by the all demand video architecture shown above in Fig. 8.
  • an embodiment of a multi-session video-on-demand architecture includes a management workstation 13 in data communication with one or more video distribution systems 16.
  • the video distribution systems 16 are in data communication with one or more end users 17. Both the management workstation 13 and the video distribution systems 16 may be remotely located with respect to the end users 17.
  • the management workstation 13 typically includes one or more processors and associated cache memory and related computer peripheral components that are in data communication with each of the video distribution systems 16 via, for example, an Ethernet connection.
  • Each video distribution systems 16 includes a digital video engine host/video pump DVEH/VP 16a and a modulator/up-converter 16b in data communication therewith via an OC3 link.
  • the video distribution systems 16 are in data communication with the end users 17 over an existing communication infrastructure, such as the Internet, cable network system, television broadcast network or satellite.
  • a disk farm 15, or content storage library contains video programs to be streamed to users 17. It should be understood that video programs are meant to include any type of digital information such as movies, JPEG files, sound files and the like.
  • the DVEH/VP 16a can saturate a 155 megabits per second OC3 optical delivery pipe that translates to approximately eight to twenty video streams. When more than the eight to twenty video streams are typically required for a given video program, multiple DVEH/VP 16a are required to distribute the video program in the video library 15.
  • One or more of the DVEHNP 16a may be dedicated to feeding a single group of users 17 linked to a common neighborhood node.
  • This architecture provides the ability to transmit any video program any user 17 subscriber via the DVEH/VP 16a's integrated PCI bus time division multiplexing and by the by the space division facility of the "N" by "M” SCSI disk controller switches.
  • a transaction processor 19 is also in data communication with the management workstation 13 via an Ethernet link.
  • the transaction processor 19 is connected to receive requests from users 17 via neighborhood nodes 21 in data communication with the transaction processor 19 through return data path receivers 23 and amplifiers and diplexors 25.
  • the management workstation 13 may consist of one or more computers and functions to distribute information to the video distribution systems 16 and control operation of the same, such as content installation, play rule determination, barker channel (advertisements) preparation, accounting, maintenance and the like. As a result, the management workstation 13 classifies requests as either requests for video content of video motion control and prioritizes the requests to determine the most efficient communication pathway, i.e., which video distribution system 16, over which to transmit the video content to the subscriber.
  • Optimization of the communication pathway is computed by the management workstation 13, with instructions sent to the appropriate DVEH/VP 16a to be executed by the same.
  • Video-motion-control requests are also transmitted to the management workstation 13 which then determines management workstation resources that may be allocated to the user 17 transmitting this request. To that end, the management workstation allocates a subset of available bandwidth of the communication link between the management workstation 13, the DVEH/VP 16a and the user 17 to facilitate video motion control. Upon termination of the video motion control bandwidth, the video motion control resource is returned to the video motion control resource pool.
  • the management workstation 13 selects the communication pathway to maximize the number of users 17 that commence viewing of a program concurrently. In this fashion, the number of users 17 that may view a video program is maximized while minimizing resources, such as video distributions systems 16, necessary transmit video content to the users 17.
  • a multi-session video architecture supports 100,000 users 17 and stores 100 different video programs in the content library 15.
  • 10% of the subscribers request to view a video program.
  • the video programs in the content library 15 are equally popular; therefore, 10,000 subscribers are selecting 100 video programs, i.e., or each video program is viewed by 100 subscribers.
  • video program surfing (browsing) is most prevalent a few minutes before and after the aforementioned hour, defining a window of viewing latency, and that each video program has a one minute interval consisting of an interesting frontal appendage, i.e., is not germane to the information, such as a plot/story-line of corresponding to the video program.
  • This window of latency permits video stream sharing among multiple users 17 while waiting for the video program to commence.
  • this example is further demonstrated assuming a user 17 requests to view the video program entitled "My Best Friend's Wedding" at a few moments after 8:03 PM. Five seconds later (8:03:05 PM), three additional users 17 transmit requests to view the same video program. At 8:03:10 PM, twelve additional users 17 select this video program and such selection continues until 86 viewers have requested to view "My Best Friend's Wedding" before information corresponding to this video program is transmitted to a user 17, e.g., before 8:04:00 PM, sixty seconds after a previous group of users 17 commenced viewing "My Best Friend's Wedding".
  • a window of viewing latency having a sixty second interval is provided in which multiple users 17 can be cobbled into group to share a common stream of video information.
  • This provides a 16.5 multiplier of architecture efficiency, with is determined by summing the total active users and dividing by the number of required channels, in this example seven channels 20a, 20b, 20c, 20d, 20e, 20f and 20g, resulting in the 16.57 improvement factor, with a channel being defined as a stream of video data being transmitted to one or more users 17 during any given instance in time.
  • Sharing of a stream of video information among multiple users 17 reduces the cost required to distribute video information. Specifically, the number of communication pathways needed to distribute video information to users 17 is reduced while increasing the number of users 17 that can view video information over a single communication pathway. This reduces the quantity and complexity of the components and subsystems required to transmit video information while increasing a number of users that may receive the same.
  • an interval of any duration may be employed, such as 10 seconds, 20 seconds, 60 seconds or longer. As this interval is increased, more efficient utilization of the video-on- demand architecture and other resources is realized, but users 1 experience longer lag times between a request for video content and receiving video content.
  • single-session video-on-demand architecture is compared with multi-session video-on-demand with all users 17 selecting the same movie during a window of viewing latency.
  • the number of channels required to transmit video program to users, in response to requests therefrom is directly proportional to the number of users 17 for single-session video-on-demand architecture.
  • the slope of line 28 indicates that the number of channels required is independent of the number of users 17 requesting to view the same. Request from users 17, however, may not be uniform, i.e., it will come in bunches. In this situation, the benefits provided by the multi-session video-on- demand architecture are greatly improved, dependent upon the statistical assumptions concerning the user 17 requests.
  • the worst case statistical distribution for the multi- session video-on-demand architecture is the uniform distribution of user 17 requests, i.e., when the number of user 17 requests for a given video program is uniform, or common, over an allocated time interval. This is shown when it is assumed that subscribers have no notion of time and are not involved in otherwise scheduled broadcast events that start and terminate on multiples of half hours. Specifically, it is widely believed that once video-on-demand users 17 become accustomed to video-on- demand architecture, their interval time awareness, as it relates to none Pay-Per-View (PPV) surfing (browsing) will converge to zero. If this is the case, then the bunchiness of multi-session video-on-demand is minimized, or non-existent.
  • PV Pay-Per-View
  • a uniform distribution model of user 17 requests is an unlikely representation of viewing patterns.
  • the uniform model is depicted on Fig. 5 as line 30.
  • the next statistical model employed to test the validation of multi-session video-on-demand is a purely random model, shown as line 32.
  • the purely random model assumes the same number of total users 17 as the uniform model, except some time intervals have more users 17 transmitting requests than do the remaining time intervals, with the differences being random. In other words, the requests are bunched into certain time intervals. This actually improves the efficiency of the multi-session video-on-demand architecture, because some time intervals will have more users 17 associated with a common channel than other intervals. Some time intervals may not have any activity what-so-ever, thereby maximizing efficiency.
  • Ultimate bunching occurs when a normal distribution, shown as line 34, of the users 17 are sending requests is assumed. As shown, this distribution assumes that periodically, e.g., every half hour, more users 17 are likely to start sending requests, because the users 17 have just completed watching a video program, e.g., from perhaps a broadcast network. The distribution assumes that no user 17 is perfectly synchronized to transmit a request instantaneously after the aforementioned scheduled program terminated. These users might first undertake some domestic activity, e.g., obtaining food to eat, but are loosely synchronized in the transmission of request to the management workstation 13. Further randomness can occur by totally random events such as answering the door or phone.
  • the subjection of the multi-session video-on- demand to this normal distribution provides more efficient use of the components and subsystems thereof, compared to single-session video-on-demand architectures. This is shown by comparing the area under each line 30, 32 and 34, that represents a number of users participating in stream sharing. The greater the number of sharing per unit time, the more efficient the architecture, with the area under all the lines 30, 32 and 34 being unity.
  • a statistical model is derived to optimize efficient use of architecture resources while meeting the expected user 17 demand in much that same manner that the standard telephone company allocates the resources associated therewith.
  • a similar statistical analysis is applied to the multi-session video-on- demand system to provide video-motion-control to the various users 17 thereof in a cost efficient manner which meeting statistically determined expectations of the users 17.
  • the statistical model employed for multi-session video-on-demand is based upon certain operational assumptions. These assumptions are that not all users are using video-motion-control functionality concurrently; video-motion-control resources are separate resources managed independent of the video content distribution resources; a pool of video-content-control resources may be created which can be time shared among multiple users; and the shared finite video-motion-control pool is small compared to the users 17.
  • the most significant usage characteristics that determine the appropriate size of the video-motion control resource pool are the types of video-motion-control functions employed, the duration for which they are employed and the time, relative to the playing time of a video program, at which point they are employed. For example, a statistical model created indicates that only a maximum of a couple of minutes, on the average per video program, involves execution of certain basic video-motion-control functions: Play, Pause, Non Viewing Fast Forward and Non Viewing Reverse. These functions require minimal bandwidth of the multi-session video-on-demand resources, because no digital audio/video MPEG channel resource is required to be dedicated to a user 17. As such, the duration for which these video-motion-control functions are employed need not be entertained, because neither a video-motion-control-resource is required.
  • Video-motion-control functions require a great deal more bandwidth.
  • the amount of video-motion-control resources is established as function of the Viewing Forward and Reverse usage. These functions include Viewing Fast Forward and Viewing Reverse. These functions require more bandwidth to execute, because a digital audio/video MPEG channel resource must be dedicated to a user 17 as well as the capacity via the return data pathway receiver 23. For example, if the average full function video-motion-control user 17 requires two minutes a video program employing these functions, and if the average video program duration is 100 minutes, then the average video-motion-control user 17 will require 2% of the architecture's systems resources which Viewing Fast Forward and Reverse, assuming a statistically uniform distribution.
  • resources could be further shared if 15 second skips were implemented in viewing video-motion-control Forward and Reverse thereby permitting an additional compression of infrastructure by some small integer multiple (not 15 to one because only MPEG I frames would be transmitted, not B and P frames; and I frames are not as compressed as B and P frames).
  • Major moves forward and reverse into the movie could be provided without video-motion-control functions further reduce the requirements on the multi- session video-on-demand architecture.
  • This could include an EPG like chapter and scene search capability.
  • a intra-movie navigation menu could be displayed with a list of chapters and indexed specific content which could be directly selected and the system would take the user 17 to that chapter or topic.
  • video-motion-control functions are not required for users not currently using pay-per-view video-on-demand. For example, assuming the percentage of video-on-demand users 17 active at one time is 15%, that only 50% of users 17 employ video-motion-control forward and reverse functions and that the amount of time these users 17 actually employ these functions is 2% of the viewing time. Then the percent of video-motion-control resources compared to video-on-demand video content distribution resources is only 1%.
  • the multi-session video-on-demand architecture is transparent to a user 17 in that its interface is similar to that of a conventional single- session video-on-demand architecture.
  • the user 17 reviews an on-line menu or program guide of available programs displayed on a video screen and selects a program. Very quickly, the system responds with the selection and begins to play it.
  • the user 17 is able to execute typical video-motion-control. For example, were a user 17 sharing a common stream with others, the user is providing the functionality of pausing, fast-forwarding, or reversing the contend of the video program that is in the stream, without disturbing the video program being viewed by the remaining users 17 sharing this common stream.
  • the user 17 Upon executing a video-motion-control function, the user 17 is removed from the shared stream and given a private video-motion-control resource, as defined above, but only for as long as required.
  • This limited private video-motion-control resource comes, for a short duration of time, i.e., a sub-portion of the bandwidth of the management workstation 13 video-motion-control pool, i.e., a large portion of bandwidth of the management workstation 13, that may be dedicated to other users 17 of the same channel.
  • the short duration of time facilitates personal video-motion- control functionality to the specific user 17 only so long as needed and which is subsequently returned to the video-motion-control pool.
  • N video- motion-control resources may be shared by "M” users 17 at any one time and on any one channel, where "N" «"M".
  • a user Upon completion of video-motion-control, a user is switched to a stream of the video program, offset in time from the original stream, with the offset in time corresponding to the portion of the video program in the stream which was being viewed by the user at the completion of the video-motion-control function.
  • the video program associated with the stream of video information appears uninterrupted to the user 17. If no such video stream is present, the management workstation 13 simply creates a new video stream to achieve the uninterrupted perception of the video program associated with the video stream that is also made available to users 17, as required.
  • the multi-session video-on-demand architecture would display a message to the user 17 indicating that "VMC Resource Were Not Available", and the video stream would continue uninterrupted.
  • each DVEH/VP 16a is fed video programs from one or more disks in the video library 15.
  • a DVEH/VP 16a to utilize the entire capacity of a disk or disk array contained in the video library 15, multiple DVEFLNPs would require multiple disks or disk array duplicates of the same video program.
  • Automatic shelf space allocation is a business model optimization paradigm facilitating content resources placement to be optimized to produce maximum revenue. Since content sales can vary hour by hour, day by day, holiday by non holiday, optimum shelf space allocation can vary accordingly. Therefore, a content management function incorporated into the management workstation 13 includes two categories: Dynamic-Shelf-Space- Allocation and Barker- Channel-Programming.
  • Dynamic-Shelf-Space- Allocation achieved by an algorithm programmed into the management workstation 13 that specifies maximizes shelf space for high grossing video programs while permitting low grossing video programs to have a lesser quantity of shelf space.
  • the algorithm is referred to as the Motion Picture Shelf Space Allocation Algorithm (MPSSAA) and is computed to automatically to provide minimum copies of content and sufficient copies (shelf space) as expected for certain showings based upon the following parameters:
  • the management workstation 13 is designed to optimize revenue generation while maintaining operational head end profits while operating within the operational latitude area 44, referred to as adapting room. This is achieved by dynamically adjusting the scheduling of programming material on the video distribution systems 16 so that, for example, the most profitable films are allocated the greatest amount of shelf space. Conversely, the least profitable video programs are given the least amount of shelf space.
  • the management workstation includes a multiple adaptive threshold element, shown in Fig.
  • the shelf space algorithm system is designed to optimize operational head end profits while operating within the minimum and maximum shelf space restraints by using information to automatically hone the operation. Profit optimization is attained by providing the most profitable films the greatest opportunity to be selected (most shelf space) while providing the least profitable films the minimum shelf space within the minimum and maximum ranges specified.
  • optimum shelf space values (ZfN ⁇ ) are evaluated and ranked. There will exist one individual optimum shelf space value for each movie or program or event and one minimum optimum shelf space value. These individual optimum shelf space values (Z ⁇ V ⁇ ) are then ranked according to their values and correlated to shelf spaces available.
  • the movie with the maximum optimum shelf space value is given the most shelf space while the movie with the minimum optimum shelf space values is given the least and movies with intermediate ranking are given shelf space accordingly.
  • one important indicator of the some of the video programs' predicted success is the theater box office sales and another is the actual system sales logged via the operator's set top boxes. These are probably the two most important parameters, however additional system refinement is made possible by the other contributing parameters.
  • Some (but not all) of the elements of the optimum shelf space values are: pending real time events, theater box office sales, number of available digital channels, demographic factors, content purchased locally, time of day, day of week, local operator preferences, holidays, program duration, avail window and duration, Movie
  • an electronic spread sheet (matrix) is assembled which automatically computes the optimum shelf space values (Z ⁇ V ⁇ ) for each movie or event.
  • the events are then sorted according to their optimum shelf space values (Z ⁇ V ⁇ ) which has been scaled in a range from 1 to 10 where 10 is best.
  • Shelf space is allocated according to optimum shelf space values (Z ⁇ N ⁇ ) by the ranking of the optimum shelf space values (Z ⁇ N ⁇ ) and weighting them according experienced need for shelf space.
  • each movie can be assigned a fixed amount of shelf space and this shelf space allocation varies by time of day, actual sales, day of week, etc. Therefore, shelf space allocation can vary hourly, daily, or by other periodicity as desired by the operator.
  • the requirement exists for an automated Barker channel which is intelligent to the extent no advertising time is wasted showing Barkers (advertisements) for video programs started and which will not show again for some time.
  • the Barker channel whose purpose it is to advertise upcoming movies and/or events is most effective when heavy advertising immediately precedes the expected start of the relevant video program event and may be employed during the window of viewing latency.
  • an All Demand Video Architecture 110 may be that supports all video transmission techniques multi-session video-on-demand, single-session video-on- demand, near-video-on-demand and scheduled programming.
  • the All Demand Video Architecture 110 may be a software and firmware implementation relying on adaptive algorithms to either optimize movie scheduling for near-video-on-demand, as disclosed in U.S. Pat. Application Number 09/ which is incorporated herein by reference shelf space allocation for video-on-demand as discussed above.
  • the All Demand Video Architecture provides GI Head End Equipment 120 having a library of movies contained therein on multiple fiber optic OC3 channels at 155.52 Mbps per channel, delivering the appropriate movie to the correct user 117 via an internal routing system and controlled by the Management Workstation.
  • the switching does not rely on expensive OC3 switches, rather it employs internal and inherent time division and space division multiplexing to permit any movie to be delivered to any user 117.
  • An N X M SCSI space division switching mechanism is combined with time division multiplexing by the DEHV/VPs 116 over a PCI bus in the Digital Video Engine Hosts.
  • the All Demand Video Architecture 110 provides content and control to the Head-End equipment. It further permits partitioning and dedicating multiplexors and modulators to different neighborhood nodes 121, and ultimately to different users 117, which is currently not facilitated by existing hardware.
  • the return data path (RPD) 123 from the Set Top Boxes (not shown) of the users (117) to the Head End and All Demand Video Architecture 110 employs standard RPD hardware, but this RPD hardware is now connected to a transaction computer 119, via a router 129 to permit the control of the overall system. In this fashion, the All Demand Video Architecture 110 permits five modes of operation shown in Figs. 8 and 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un procédé et un appareil permettant à de multiples utilisateurs (17) d'un sous-groupe de noeuds voisins (21) de partager un train d'informations vidéo et de donner en même temps à chaque utilisateur la possibilité de commander le mouvement vidéo sans que cela interrompe le matériel de programme vidéo regardé par les autres utilisateurs partageant le train d'informations vidéo. De plus, les demandes de commande de mouvement vidéo sont transmises au poste de gestion (13), qui détermine ensuite les ressources dudit poste pouvant être attribuées à l'utilisateur émettant la demande. Le poste de gestion sélectionne une voie de communication efficace qui maximise le nombre d'utilisateurs regardant un programme simultanément. L'invention porte aussi sur un procédé et un appareil permettant de maximiser la disponibilité d'informations vidéo dans une banque de données vidéo (15), et de minimiser le support de données requis pour la mémorisation des informations vidéo contenues dans ladite banque.
PCT/US1999/000501 1998-01-08 1999-01-08 Utilisation partagee de train de donnees video WO1999035660A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22193/99A AU2219399A (en) 1998-01-08 1999-01-08 Video stream sharing

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US7073998P 1998-01-08 1998-01-08
US60/070,739 1998-01-08
US7200498P 1998-01-21 1998-01-21
US60/072,004 1998-01-21

Publications (1)

Publication Number Publication Date
WO1999035660A1 true WO1999035660A1 (fr) 1999-07-15

Family

ID=26751451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/000501 WO1999035660A1 (fr) 1998-01-08 1999-01-08 Utilisation partagee de train de donnees video

Country Status (2)

Country Link
AU (1) AU2219399A (fr)
WO (1) WO1999035660A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003013134A1 (fr) * 2001-07-19 2003-02-13 Klotz Digital Ag Dispositif pour la sortie securisee et economique de donnees audio et video
US6535240B2 (en) 2001-07-16 2003-03-18 Chih-Lung Yang Method and apparatus for continuously receiving frames from a plurality of video channels and for alternately continuously transmitting to each of a plurality of participants in a video conference individual frames containing information concerning each of said video channels
WO2003101106A1 (fr) * 2002-05-24 2003-12-04 Oikos Anstalt Procede et systeme de gestion de contenus audiovisuels pour la distribution de ceux-ci en mode sur demande
EP1811779A1 (fr) * 2002-05-24 2007-07-25 Oikos Anstalt Procede et systeme de gestion de contenus audiovisuels pour la distribution de ceux-ci en mode sur demande
US7492387B2 (en) 2002-08-05 2009-02-17 Chih-Lung Yang Implementation of MPCP MCU technology for the H.264 video standard
US7616591B2 (en) 2001-07-16 2009-11-10 Excedra Technology, LLC Video conferencing system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5442390A (en) * 1993-07-07 1995-08-15 Digital Equipment Corporation Video on demand with memory accessing and or like functions
US5583561A (en) * 1994-06-07 1996-12-10 Unisys Corporation Multi-cast digital video data server using synchronization groups
US5594491A (en) * 1995-12-29 1997-01-14 Vxl/Hcr Technology Corporation Near-video-on-demand digital video distribution system utilizing asymmetric digital subscriber lines
US5606359A (en) * 1994-06-30 1997-02-25 Hewlett-Packard Company Video on demand system with multiple data sources configured to provide vcr-like services
US5684918A (en) * 1992-02-07 1997-11-04 Abecassis; Max System for integrating video and communications

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684918A (en) * 1992-02-07 1997-11-04 Abecassis; Max System for integrating video and communications
US5442390A (en) * 1993-07-07 1995-08-15 Digital Equipment Corporation Video on demand with memory accessing and or like functions
US5583561A (en) * 1994-06-07 1996-12-10 Unisys Corporation Multi-cast digital video data server using synchronization groups
US5606359A (en) * 1994-06-30 1997-02-25 Hewlett-Packard Company Video on demand system with multiple data sources configured to provide vcr-like services
US5594491A (en) * 1995-12-29 1997-01-14 Vxl/Hcr Technology Corporation Near-video-on-demand digital video distribution system utilizing asymmetric digital subscriber lines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6535240B2 (en) 2001-07-16 2003-03-18 Chih-Lung Yang Method and apparatus for continuously receiving frames from a plurality of video channels and for alternately continuously transmitting to each of a plurality of participants in a video conference individual frames containing information concerning each of said video channels
US7616591B2 (en) 2001-07-16 2009-11-10 Excedra Technology, LLC Video conferencing system
US7646736B2 (en) 2001-07-16 2010-01-12 Exedra Technology, Llc Video conferencing system
US8125932B2 (en) 2001-07-16 2012-02-28 Exedra Technologies, LLC Method and apparatus for continuously receiving images from a plurality of video channels and for alternately continuously transmitting to each of a plurality of participants in a video conference individual images containing information concerning each of said video channels
WO2003013134A1 (fr) * 2001-07-19 2003-02-13 Klotz Digital Ag Dispositif pour la sortie securisee et economique de donnees audio et video
WO2003101106A1 (fr) * 2002-05-24 2003-12-04 Oikos Anstalt Procede et systeme de gestion de contenus audiovisuels pour la distribution de ceux-ci en mode sur demande
EP1811779A1 (fr) * 2002-05-24 2007-07-25 Oikos Anstalt Procede et systeme de gestion de contenus audiovisuels pour la distribution de ceux-ci en mode sur demande
US7492387B2 (en) 2002-08-05 2009-02-17 Chih-Lung Yang Implementation of MPCP MCU technology for the H.264 video standard

Also Published As

Publication number Publication date
AU2219399A (en) 1999-07-26

Similar Documents

Publication Publication Date Title
US6938268B1 (en) Video stream sharing
US10917699B2 (en) Methods, apparatus, and systems for providing media and advertising content over a communications network
US8533765B2 (en) On demand system and method using dynamic broadcast scheduling
US5790935A (en) Virtual on-demand digital information delivery system and method
KR100570458B1 (ko) 즉시 시작 멀티미디어 콘텐트를 제공하는 방법 및 시스템
US6859839B1 (en) Bandwidth reduction of on-demand streaming data using flexible merger hierarchies
US20190208286A1 (en) Queue based advertisement scheduling and sales
CA2233576C (fr) Systeme et procede pour optimiser les preferences des abonnes en matiere de programmation
EP1389874B1 (fr) Changement rapide de canal numérique
US8001575B2 (en) Method of distributing video-on-demand over an internet protocol network infrastructure
US7337231B1 (en) Providing media on demand
US11044497B1 (en) Method of unified video switching and advertisement splicing within consumer devices
US9294731B2 (en) Dynamic VOD channel allocation based on viewer demand
US20030066093A1 (en) Methods and apparatus for circular broadcasting an audio and video signal
US7831989B1 (en) Intelligent asset management in a cable services system
JP4557985B2 (ja) 双方向テレビジョン環境下での返信経路の制御
US8495689B2 (en) System and method for partial push video on demand
WO1999035660A1 (fr) Utilisation partagee de train de donnees video
Petit et al. Bandwidth resource optimization in video-on-demand network architectures
Ko et al. An overview of interactive video on demand system
Kulkarni Bandwidth efficient video-on-demand algorithm (beva)
KR100886577B1 (ko) 프로그램을 클라이언트 단말기에 전송하기 위한 시스템
CN100405845C (zh) 用于传输延迟访问客户通用数据点播服务的方法和系统
US20100058393A1 (en) Switched Digital Video Broadcast Scheduler
TWI223563B (en) Methods and systems for transmitting delayed access client generic data-on-demand services

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: KR

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载