CA2335667C - Method and apparatus for the display of selected images at selected times - Google Patents
Method and apparatus for the display of selected images at selected times Download PDFInfo
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- CA2335667C CA2335667C CA 2335667 CA2335667A CA2335667C CA 2335667 C CA2335667 C CA 2335667C CA 2335667 CA2335667 CA 2335667 CA 2335667 A CA2335667 A CA 2335667A CA 2335667 C CA2335667 C CA 2335667C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/165—Centralised control of user terminal ; Registering at central
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/02—Marketing; Price estimation or determination; Fundraising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/06—Arrangements for scheduling broadcast services or broadcast-related services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
- H04N21/25866—Management of end-user data
- H04N21/25883—Management of end-user data being end-user demographical data, e.g. age, family status or address
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26258—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2668—Creating a channel for a dedicated end-user group, e.g. insertion of targeted commercials based on end-user profiles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41415—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance involving a public display, viewable by several users in a public space outside their home, e.g. movie theatre, information kiosk
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/812—Monomedia components thereof involving advertisement data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
- H04H60/21—Billing for the use of broadcast information or broadcast-related information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
- H04H60/23—Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
- H04H60/45—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying users
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Business, Economics & Management (AREA)
- Databases & Information Systems (AREA)
- Development Economics (AREA)
- Finance (AREA)
- Strategic Management (AREA)
- Computer Security & Cryptography (AREA)
- Accounting & Taxation (AREA)
- Marketing (AREA)
- Computer Graphics (AREA)
- Entrepreneurship & Innovation (AREA)
- Game Theory and Decision Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Economics (AREA)
- Physics & Mathematics (AREA)
- General Business, Economics & Management (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Information Transfer Between Computers (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
This invention relates to a method for the remote display of selected images at selected times and to an autonomous digital distribution system and components thereof used with such method. This method and system allow advertisers, retailers, television networks and other information providers to have access and maintain, via geographic, demographic and/or other selectors to a diverse network of remotely located out-of-home electronic multimedia displays of varying format and capacity. The system may also comprise means to translate sold and unsold air-time into actual presentation schedules.
Description
METHOD AND APPARATUS FOR THE DISPLAY OF
SELECTED IMAGES AT SELECTED TIMES
BACKGROUND OF THE INVENTION
= Field of the Invention This invention relates to a method for the remote display of selected images at selected times and to an Autonomous Distribution System (ADS) and components thereof used with such method. This method and system offer an end-to-end solution for advertisers, retailers, television networks and other information providers wishing to access, via geographic, demographic and/or other selectors, a diverse network of remotely located out-of-home electronic multimedia displays of varying format and capacity.
= Description of Prior Art Geographic, video and similar display systems are known in the art and are often used for advertising and information presentation. Multiple display presentation systems having a set of displays forjointly reproducing, either in still or continuous motion, successive sets of correlated images according to a desired and modifiable presentation program are known. Examples of such systems are shown in US patents 5,335,081 (Yamaguchi et al.), 5,488,385 (Singhal et al.), 5,692,330 (Anderson), 5,694,141 (Chee), 5,933,154 (Howard et al.), 5,361,078 (Caine), 4,866,530 (Kalua), 4,800,376 (Suga et al.) and 4,760,388 (Tatsumi et al.) SUMMARY OF THE INVENTION
Introduction A digital distribution control and presentation method and system is designed to offer an end-to-end solution for advertisers, retailers, television networks and other information providers wishing to access, via geographic, demographic and temporal selectors, a diverse network of remotely located out-of-home electronic multimedia displays of varying format and capacity.
The fundamental concepts behind the "autonomous distribution system" are based upon analysis of the sales and presentation activity in the private multi-media industry. Typical clients for private broadcasts are retail store chains. The electronic content presented in a store chain is organized in a fashion similar to a television channel with content and advertising mixed together. However, while all stores in the chain may wish to have the same informative content, the advertising inserted in the channel may differ from store to store depending upon the stock, traffic and sales activity in a specific location. Thus, the ability to create broadly distributed channels, but with fine-grained differentiation in the advertising content of each channel based upon location or demographics is the goal of advertisers and retailers alike. The autonomous distribution system technology or the invention was designed with this functionality as the target objective.
As a distribution system, the autonomous distribution system is particularly effective at planning the transmission and maintenance of electronic files to globally distributed sites.
It could be used by a television network wishing to send varying content (e.g.
commercials, local announcements, etc...) to its affiliated stations in different markets.
The system can be broken into four distinct activities:
= Scheduling control and planning = Transmission planning and performance = Site presentation and control = Network monitoring tools and remote access.
Each activity in the system preferably has the following characteristics:
= Completely autonomous standalone functionality = Optimised planning and implementation for reduced operation costs = Guarantee of service and active telemetry of system status.
The autonomous distribution system of the invention is based on a client-server architecture involving an independent autonomous Scheduling System connected to a plurality of display sub-systems, through a high bandwidth network which is controlled by a Transmission Control System.
The Scheduling System is also connected to individual workstations through a direct connection or through any appropriate network such as the Internet.
Workstation operators can, via the Scheduling System, access the network of display sub-systems using geographic, demographic and temporal selectors to implement advertising and other distribution campaigns. Matrix planning is used to allow multiple campaigns to participate in overlapping sub-sets of display sites on the network.
Scheduling Scheduling is performed using three different methods:
= Method 1(direct): this scheduling method allows workstation operators to access individual display sub-systems and schedule multimedia distribution and presentation at specific times and frequencies.
= Method 2 (play list): this scheduling method causes a display sub-system to cycle through a play list of content.
= Method 3 (coverage): coverage planning is a complex operation involving planning a multimedia campaign involving one or many display sub-systems. The optimisation is performed at two levels; display specific, and inter-display. This optimisation procedure takes into account the following sets of criteria:
o A multilevel set of industry-specific conflict detection and avoidance or attraction involving presence and timing of advertising from competing or complementary industry members and conflicting industry interdictions. Conflicts are resolved on one display sub-system or between several display sub-systems in close proximity and even on one specific display screen in those cases where a display sub-system is capable of independently controlling a plurality of display screens. Conflict management may also involve restrictions on specific advertising content at certain locations during certain time periods.
o Demographic reach targets for audience specification.
o Multiple methods of optimisation of play list content within a working "day" period (a "day" need not be 24-hours).
o Optimization of planning and implementation of multiple ads in complex campaigns.
o Generation of display site list and presentations for multiples sites to achieve campaign targets.
0 Schedule planning for campaigns involving random migration of content on a portion of a targeted subset of the display sub-systems on the network during the campaign. This "roaming"
campaign allows greater "first sight" coverage of a targeted demographic/ geographic segment.
The system maintains two sets of scheduling data for each display screen in the network.
The first set contains the available air-time "inventory" consisting of the maximum possible advertising time for each display screen. The second data set contains the actual presentation play lists. Since not all inventory is always sold, and the system must not show blank display screens to the audience, the system must translate from the actually sold inventory into the actual presentation schedule while safeguarding the original intention of the advertising campaign. Multiple methods of generating the actual presentation play lists from the inventory actually sold have been developed and implemented:
= Method A - Generate a rotation of content showing exactly the order of content planned, but disregarding the original planned length of the rotation. Thus if one hour of air-time was originally for sale, but only 40 minutes has been sold, then the resultant play list will show a repeating 40 minute loop of unique content.
Method B - Generate a play list which maintains the original length and placement of the content, but fills in the empty spots in a manner consistent with the original intentions of the advertisers. This method is the most complex and involves filling in the unsold advertising spots with a combination of Public service spots and advertising taken from those advertisers present in the schedule and inserted in priority and proportion to their presence in the sold schedule. Thus an advertiser purchasing 50%
of the inventory on a display screen will have a higher priority than one who purchased only 20% of the available space. The unsold space will then be filled in proportion to their purchase and priority. In this way, the system safeguards the original intentions of the advertiser in term of market penetration and presentation priority while maintaining a professional display appearance.
Workstations The planning workstations are linked to a Scheduling System and are programmed to allow non-experts to implement complex advertising and information campaigns according to targets previously planned by media specialists. The workstations use an optimised Graphical User Interface (GUI) to assist in the implementation of the campaigns.
The workstations support multiple levels of user privilege ranging from general access to supervisor level control. In this way the system allows multiple levels of verification before campaigns can be implemented on the display sub-systems network.
The campaign planning system (hereinafter the "CPS") is a graphical tool, within the autonomous distribution system workstation interface, used to convert macroscopic Human-oriented advertising objectives into specific display and event schedules. The CPS takes the following factors into account when planning a campaign:
= Demographic goals of campaign.
= Geographic goals of campaign.
= Budgetary restrictions of campaign.
= Industry and presentation timetable restrictions.
= Market Penetration.
= Target audience size.
The CPS functions via an extensive database record maintained for each display screen or channel controlled by the autonomous distribution system. Each database record keeps data on such diverse elements as geographic and demographic groups, industry and timetable exclusions, financial costs and audience traffic patterns.
The workstation program allows the users to monitor the progression and achievement of the goals of specific advertising and information campaigns and the overall network.
Complex campaigns and system status indicators are viewed using a 3-dimensional data cube designed to allow surface-type presentation of the activities of large volumes of data, campaigns and display activity.
SELECTED IMAGES AT SELECTED TIMES
BACKGROUND OF THE INVENTION
= Field of the Invention This invention relates to a method for the remote display of selected images at selected times and to an Autonomous Distribution System (ADS) and components thereof used with such method. This method and system offer an end-to-end solution for advertisers, retailers, television networks and other information providers wishing to access, via geographic, demographic and/or other selectors, a diverse network of remotely located out-of-home electronic multimedia displays of varying format and capacity.
= Description of Prior Art Geographic, video and similar display systems are known in the art and are often used for advertising and information presentation. Multiple display presentation systems having a set of displays forjointly reproducing, either in still or continuous motion, successive sets of correlated images according to a desired and modifiable presentation program are known. Examples of such systems are shown in US patents 5,335,081 (Yamaguchi et al.), 5,488,385 (Singhal et al.), 5,692,330 (Anderson), 5,694,141 (Chee), 5,933,154 (Howard et al.), 5,361,078 (Caine), 4,866,530 (Kalua), 4,800,376 (Suga et al.) and 4,760,388 (Tatsumi et al.) SUMMARY OF THE INVENTION
Introduction A digital distribution control and presentation method and system is designed to offer an end-to-end solution for advertisers, retailers, television networks and other information providers wishing to access, via geographic, demographic and temporal selectors, a diverse network of remotely located out-of-home electronic multimedia displays of varying format and capacity.
The fundamental concepts behind the "autonomous distribution system" are based upon analysis of the sales and presentation activity in the private multi-media industry. Typical clients for private broadcasts are retail store chains. The electronic content presented in a store chain is organized in a fashion similar to a television channel with content and advertising mixed together. However, while all stores in the chain may wish to have the same informative content, the advertising inserted in the channel may differ from store to store depending upon the stock, traffic and sales activity in a specific location. Thus, the ability to create broadly distributed channels, but with fine-grained differentiation in the advertising content of each channel based upon location or demographics is the goal of advertisers and retailers alike. The autonomous distribution system technology or the invention was designed with this functionality as the target objective.
As a distribution system, the autonomous distribution system is particularly effective at planning the transmission and maintenance of electronic files to globally distributed sites.
It could be used by a television network wishing to send varying content (e.g.
commercials, local announcements, etc...) to its affiliated stations in different markets.
The system can be broken into four distinct activities:
= Scheduling control and planning = Transmission planning and performance = Site presentation and control = Network monitoring tools and remote access.
Each activity in the system preferably has the following characteristics:
= Completely autonomous standalone functionality = Optimised planning and implementation for reduced operation costs = Guarantee of service and active telemetry of system status.
The autonomous distribution system of the invention is based on a client-server architecture involving an independent autonomous Scheduling System connected to a plurality of display sub-systems, through a high bandwidth network which is controlled by a Transmission Control System.
The Scheduling System is also connected to individual workstations through a direct connection or through any appropriate network such as the Internet.
Workstation operators can, via the Scheduling System, access the network of display sub-systems using geographic, demographic and temporal selectors to implement advertising and other distribution campaigns. Matrix planning is used to allow multiple campaigns to participate in overlapping sub-sets of display sites on the network.
Scheduling Scheduling is performed using three different methods:
= Method 1(direct): this scheduling method allows workstation operators to access individual display sub-systems and schedule multimedia distribution and presentation at specific times and frequencies.
= Method 2 (play list): this scheduling method causes a display sub-system to cycle through a play list of content.
= Method 3 (coverage): coverage planning is a complex operation involving planning a multimedia campaign involving one or many display sub-systems. The optimisation is performed at two levels; display specific, and inter-display. This optimisation procedure takes into account the following sets of criteria:
o A multilevel set of industry-specific conflict detection and avoidance or attraction involving presence and timing of advertising from competing or complementary industry members and conflicting industry interdictions. Conflicts are resolved on one display sub-system or between several display sub-systems in close proximity and even on one specific display screen in those cases where a display sub-system is capable of independently controlling a plurality of display screens. Conflict management may also involve restrictions on specific advertising content at certain locations during certain time periods.
o Demographic reach targets for audience specification.
o Multiple methods of optimisation of play list content within a working "day" period (a "day" need not be 24-hours).
o Optimization of planning and implementation of multiple ads in complex campaigns.
o Generation of display site list and presentations for multiples sites to achieve campaign targets.
0 Schedule planning for campaigns involving random migration of content on a portion of a targeted subset of the display sub-systems on the network during the campaign. This "roaming"
campaign allows greater "first sight" coverage of a targeted demographic/ geographic segment.
The system maintains two sets of scheduling data for each display screen in the network.
The first set contains the available air-time "inventory" consisting of the maximum possible advertising time for each display screen. The second data set contains the actual presentation play lists. Since not all inventory is always sold, and the system must not show blank display screens to the audience, the system must translate from the actually sold inventory into the actual presentation schedule while safeguarding the original intention of the advertising campaign. Multiple methods of generating the actual presentation play lists from the inventory actually sold have been developed and implemented:
= Method A - Generate a rotation of content showing exactly the order of content planned, but disregarding the original planned length of the rotation. Thus if one hour of air-time was originally for sale, but only 40 minutes has been sold, then the resultant play list will show a repeating 40 minute loop of unique content.
Method B - Generate a play list which maintains the original length and placement of the content, but fills in the empty spots in a manner consistent with the original intentions of the advertisers. This method is the most complex and involves filling in the unsold advertising spots with a combination of Public service spots and advertising taken from those advertisers present in the schedule and inserted in priority and proportion to their presence in the sold schedule. Thus an advertiser purchasing 50%
of the inventory on a display screen will have a higher priority than one who purchased only 20% of the available space. The unsold space will then be filled in proportion to their purchase and priority. In this way, the system safeguards the original intentions of the advertiser in term of market penetration and presentation priority while maintaining a professional display appearance.
Workstations The planning workstations are linked to a Scheduling System and are programmed to allow non-experts to implement complex advertising and information campaigns according to targets previously planned by media specialists. The workstations use an optimised Graphical User Interface (GUI) to assist in the implementation of the campaigns.
The workstations support multiple levels of user privilege ranging from general access to supervisor level control. In this way the system allows multiple levels of verification before campaigns can be implemented on the display sub-systems network.
The campaign planning system (hereinafter the "CPS") is a graphical tool, within the autonomous distribution system workstation interface, used to convert macroscopic Human-oriented advertising objectives into specific display and event schedules. The CPS takes the following factors into account when planning a campaign:
= Demographic goals of campaign.
= Geographic goals of campaign.
= Budgetary restrictions of campaign.
= Industry and presentation timetable restrictions.
= Market Penetration.
= Target audience size.
The CPS functions via an extensive database record maintained for each display screen or channel controlled by the autonomous distribution system. Each database record keeps data on such diverse elements as geographic and demographic groups, industry and timetable exclusions, financial costs and audience traffic patterns.
The workstation program allows the users to monitor the progression and achievement of the goals of specific advertising and information campaigns and the overall network.
Complex campaigns and system status indicators are viewed using a 3-dimensional data cube designed to allow surface-type presentation of the activities of large volumes of data, campaigns and display activity.
A specialized web-browser version of the workstation called the "Direct-Access System"
or "remote workstation" permits a sub-set of the workstation functionality to be accessible by service and sales operatives in the field. The remote workstations connect to the network via the Internet or other known means. Using this method, no special software is required on the operative's computer to access the Scheduling System.
Transmission Scheduling and Broadcasting The Transmission Control System is the communications control hub for the entire system. It is responsible for delivering the content and commands determined by the Scheduling System to the specified set of display sub-systems. The Transmission Control System is responsible for the overall electromechanical health of the network.
As such it performs the following tasks:
= Receive content and commands from the Scheduling System.
= Plan and execute an optimized transmission schedule designed to achieve just-in-time delivery of multimedia content at a minimum of cost and a maximum of reliability using whatever means of delivery are available.
= Implement a dynamically shifting multicast/unicast transmission protocol for reduced communications costs and minimized bandwidth.
= Encrypt/decrypt data for enhanced security.
= Receive performance logs and display site telemetry for aggregations and forwarding to the Scheduling System.
The primary data communications mechanism used by the Transmission Control System to communicate with the display sub-systems is preferably via bi-directional VSAT
technology using small remote-site dish antennas. However, the Transmission Control System is also capable of using any IP-based transmission technology such as Internet, ISDN and POTS lines.
The heart of the Transmission Control System is the transmission optimizer.
This is a specific software solution designed to take in a diverse set of requests for content delivery to specific sites on a IP-based network and generate a transmission schedule which gives the maximum of efficiency and certainty of success, while using the minimum of delivery channel bandwidth. The transmission optimizer of the Transmission Control System allows the implementation of a Just-In-Time delivery over networks of varying topology.
Display Sub-Systems The display sub-systems are responsible for implementing the content presentation on the schedule which was previously planned. Each display sub-system comprises one or more display screen(s) (the size and performance characteristics of which will depend on the needs of the site where it is to be installed) and a display control system which receives and stores the data received from the Scheduling System and is adapted to display the images on its associated display screen(s) in accordance with the play list.
The display sub-systems preferably have the following characteristics:
= Multi-channel presentation of multi-media content such as MPEG-1 and 2 and on-screen overlay of text and graphical images.
= Data reception via VSAT, or other electronic transceiver technology.
= Performance data-logging for transmission of "as-run" performance logs to the Transmission Control System from the display controller system.
= Fully redundant mechanical and electronic operations.
= Operate in either primary or team mode to implement multimedia concepts requiring screen resources greater than one display sub-system can muster. In this way a display sub-system can declare itself "site master" and receive content and or content location scheduling information for other display sub-systems. The site master will then forward and co-ordinate the activities of the team member display sub-systems.
= An active configuration management protocol is built into the display sub-systems. This protocol allows the units to communicate via IP, RS-232 or other means with industry standard equipment used with display sub-systems to create special effects such as lighting and sound control or video-wall support via synchronisation of the independent video outputs.
= Contains an intelligent content management and acquisition capacity. Due to this capacity, the Scheduling System can function autonomously from the network and distribution management activity. The Scheduling System informs Display Controllers of their required activity. The Display Controllers then analyze the instructions and validate that they possess the resources necessary to perform said activities. If and when a data file is determined to be necessary, the Display Controller is then responsible for requesting the delivery of said file from the Transmission Control System within the available time period. It is this independent pushing of the desired state of the activity at the edge of the network, which in turn generates the pull of content from wherever it may be available that allows the system to be autonomous, efficient and reliable.
The Display Controller can also use the above capabilities to act as a digital content warehouse and communications access point for external sub-systems such as interactive kiosks and hosted applications developed by third parties. The autonomous "push-pull"
of the Scheduling-Display-Transmission Control Systems allows the system to be equally efficient and useful for data distribution and maintenance activity as for advertising and digital presentation.
Network Monitoring Tools and Remote Access The Scheduling System and the Transmission Control System support remote access for system monitoring and control. Using this mechanism, the following tools are implemented for remote access: main system data concentrator panels, and sales/marketing access programs using connection via the Internet or other known means.
Concentrator panels which are large format graphical displays running on independent computer systems are used in conjunction with each service and transmission center.
Each concentrator panel shows the state of the overall system. Two specific types of concentrator panels are used: the network activity monitor and the system status and transmission activity monitor.
The monitoring programs used to update the concentrator panels are capable of operating using direct LAN, Internet or other known conneccions to the system. This permits the system to be monitored by managers at remote sites using varying equipment.
The sales access programs allow sales and marketing personnel to plan and book time on the system without actually having to prepare content. The reduced bandwidth requirements permit the sales personnel to operate their stations at a customer site using an Internec connection. Each station can present the state of inventory and availability on the system. The sales personnel can begin and plan campaigns, and finally make sales proposals. The system then automatically forwards the instructions to the Scheduling System for the fully trained workstation operators to continue the required operations for implementation using the Scheduling Workstations.
There is, therefore, provided a a system to control the display of digital multimedia content on a plurality of out-of-home remote visual display systems connected together via a broadband network characterized in that each said visual display system comprises an advertising panel arranged to be viewable by a plurality of individuals and each visual display system is associated with an air time use database.
There is also provided a digital presentation system as descrYbed above further comprising first means for inputting and storing demograpliic data in relation to the geographic location of each visual display sub-system.
or "remote workstation" permits a sub-set of the workstation functionality to be accessible by service and sales operatives in the field. The remote workstations connect to the network via the Internet or other known means. Using this method, no special software is required on the operative's computer to access the Scheduling System.
Transmission Scheduling and Broadcasting The Transmission Control System is the communications control hub for the entire system. It is responsible for delivering the content and commands determined by the Scheduling System to the specified set of display sub-systems. The Transmission Control System is responsible for the overall electromechanical health of the network.
As such it performs the following tasks:
= Receive content and commands from the Scheduling System.
= Plan and execute an optimized transmission schedule designed to achieve just-in-time delivery of multimedia content at a minimum of cost and a maximum of reliability using whatever means of delivery are available.
= Implement a dynamically shifting multicast/unicast transmission protocol for reduced communications costs and minimized bandwidth.
= Encrypt/decrypt data for enhanced security.
= Receive performance logs and display site telemetry for aggregations and forwarding to the Scheduling System.
The primary data communications mechanism used by the Transmission Control System to communicate with the display sub-systems is preferably via bi-directional VSAT
technology using small remote-site dish antennas. However, the Transmission Control System is also capable of using any IP-based transmission technology such as Internet, ISDN and POTS lines.
The heart of the Transmission Control System is the transmission optimizer.
This is a specific software solution designed to take in a diverse set of requests for content delivery to specific sites on a IP-based network and generate a transmission schedule which gives the maximum of efficiency and certainty of success, while using the minimum of delivery channel bandwidth. The transmission optimizer of the Transmission Control System allows the implementation of a Just-In-Time delivery over networks of varying topology.
Display Sub-Systems The display sub-systems are responsible for implementing the content presentation on the schedule which was previously planned. Each display sub-system comprises one or more display screen(s) (the size and performance characteristics of which will depend on the needs of the site where it is to be installed) and a display control system which receives and stores the data received from the Scheduling System and is adapted to display the images on its associated display screen(s) in accordance with the play list.
The display sub-systems preferably have the following characteristics:
= Multi-channel presentation of multi-media content such as MPEG-1 and 2 and on-screen overlay of text and graphical images.
= Data reception via VSAT, or other electronic transceiver technology.
= Performance data-logging for transmission of "as-run" performance logs to the Transmission Control System from the display controller system.
= Fully redundant mechanical and electronic operations.
= Operate in either primary or team mode to implement multimedia concepts requiring screen resources greater than one display sub-system can muster. In this way a display sub-system can declare itself "site master" and receive content and or content location scheduling information for other display sub-systems. The site master will then forward and co-ordinate the activities of the team member display sub-systems.
= An active configuration management protocol is built into the display sub-systems. This protocol allows the units to communicate via IP, RS-232 or other means with industry standard equipment used with display sub-systems to create special effects such as lighting and sound control or video-wall support via synchronisation of the independent video outputs.
= Contains an intelligent content management and acquisition capacity. Due to this capacity, the Scheduling System can function autonomously from the network and distribution management activity. The Scheduling System informs Display Controllers of their required activity. The Display Controllers then analyze the instructions and validate that they possess the resources necessary to perform said activities. If and when a data file is determined to be necessary, the Display Controller is then responsible for requesting the delivery of said file from the Transmission Control System within the available time period. It is this independent pushing of the desired state of the activity at the edge of the network, which in turn generates the pull of content from wherever it may be available that allows the system to be autonomous, efficient and reliable.
The Display Controller can also use the above capabilities to act as a digital content warehouse and communications access point for external sub-systems such as interactive kiosks and hosted applications developed by third parties. The autonomous "push-pull"
of the Scheduling-Display-Transmission Control Systems allows the system to be equally efficient and useful for data distribution and maintenance activity as for advertising and digital presentation.
Network Monitoring Tools and Remote Access The Scheduling System and the Transmission Control System support remote access for system monitoring and control. Using this mechanism, the following tools are implemented for remote access: main system data concentrator panels, and sales/marketing access programs using connection via the Internet or other known means.
Concentrator panels which are large format graphical displays running on independent computer systems are used in conjunction with each service and transmission center.
Each concentrator panel shows the state of the overall system. Two specific types of concentrator panels are used: the network activity monitor and the system status and transmission activity monitor.
The monitoring programs used to update the concentrator panels are capable of operating using direct LAN, Internet or other known conneccions to the system. This permits the system to be monitored by managers at remote sites using varying equipment.
The sales access programs allow sales and marketing personnel to plan and book time on the system without actually having to prepare content. The reduced bandwidth requirements permit the sales personnel to operate their stations at a customer site using an Internec connection. Each station can present the state of inventory and availability on the system. The sales personnel can begin and plan campaigns, and finally make sales proposals. The system then automatically forwards the instructions to the Scheduling System for the fully trained workstation operators to continue the required operations for implementation using the Scheduling Workstations.
There is, therefore, provided a a system to control the display of digital multimedia content on a plurality of out-of-home remote visual display systems connected together via a broadband network characterized in that each said visual display system comprises an advertising panel arranged to be viewable by a plurality of individuals and each visual display system is associated with an air time use database.
There is also provided a digital presentation system as descrYbed above further comprising first means for inputting and storing demograpliic data in relation to the geographic location of each visual display sub-system.
In a preferred embodiment, there is provided a method for the display of multimedia content on one or more out-of-home remote display screens connected to one or more display controllers which are themselves connected to a scheduling server and a transmission server via a data communication network comprising the following steps:
a) selecting multimedia content to be displayed;
b) storing said content on the scheduling server;
c) selecting one of said display screens on which the content is to be displayed;
d) storing such display screen selection on said scheduling server;
e) selecting a time interval during which said content is to be displayed on said display screen;
f) storing said time internal selection on said scheduling server;
g) transmitting said stored content and said stored time interval selection to the display controller connected to said selected display screen;
h) displaying the selected content on the selected display screen during the selected time interval.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic representation of a first embodiment of an autonomous digital presentation system in accordance with the invention. The diagram shows a system involving several service bureaux each containing a Scheduling Server and a plurality of workstations connected via high-speed connection with a Transmission centre containing a Transmission Conirol System. The Transmission Control System is also connected via a secondary network with a diverse group of display sub-systems each containing one or more display screen(s).
Figure 2 is a schematic representation of a complex display sub-system which may b~
used with the invention.
a) selecting multimedia content to be displayed;
b) storing said content on the scheduling server;
c) selecting one of said display screens on which the content is to be displayed;
d) storing such display screen selection on said scheduling server;
e) selecting a time interval during which said content is to be displayed on said display screen;
f) storing said time internal selection on said scheduling server;
g) transmitting said stored content and said stored time interval selection to the display controller connected to said selected display screen;
h) displaying the selected content on the selected display screen during the selected time interval.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic representation of a first embodiment of an autonomous digital presentation system in accordance with the invention. The diagram shows a system involving several service bureaux each containing a Scheduling Server and a plurality of workstations connected via high-speed connection with a Transmission centre containing a Transmission Conirol System. The Transmission Control System is also connected via a secondary network with a diverse group of display sub-systems each containing one or more display screen(s).
Figure 2 is a schematic representation of a complex display sub-system which may b~
used with the invention.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
The digital presentation system shown in figure 1 comprises a Transmission Centre 10 and several Service Bureaux 20, 30 and 40 all controlling groups of display sub-systems.
The Transmission Centre 10 comprises a Transmission Control System 100 comprising a CPU 110 a central storage 120, a first computer screen 130, a second computer screen 135, a large concentrator display panel 140 all connected to the CPU 110.
Similarly, there are provided Service Bureaux each containing Scheduling Servers 200, 300 and 400 respectively, each having a CPU (210, 310, 410), local storage (220, 320, 420), multiple workstations (230, 235, 330, 335, 430, 435) and one large concentrator display panel (240, :340, 440) all connected to their respective CPUs 210, 310 and 410.
All of the Scheduling Servers are connected via a high bandwidth network for example Teleglobe's high bandwidth network 700. This network of Scheduling Servers form the Scheduling System. Network 700 also connects all Scheduling Servers (200, 300, 400) to the Transmission Control System 100.
A second network 600 comprising links (610, 621, 622, 623, 630, 631, 632, 640, 641, 642) connects the Transmission Control System to all the individual display sub-systems 520, 521, 522, 530, 531, 532, 540, 541 and 542 via a satellite dish 500 dish control 650 and a Ku band satellite 550.
Each display sub-system comprises a satellite dish, a CPU, a storage mechanism and at least one display screen (260, 261, 262, 360, 361, 362, 460, 461, 462) adapted to be seen by passers-by.
A single Service Bureau can service a given metropolitan area in which a plurality of display sub-systems can be strategically deployed inside buildings or outside where they may replace traditional billboards.
The digital presentation system shown in figure 1 comprises a Transmission Centre 10 and several Service Bureaux 20, 30 and 40 all controlling groups of display sub-systems.
The Transmission Centre 10 comprises a Transmission Control System 100 comprising a CPU 110 a central storage 120, a first computer screen 130, a second computer screen 135, a large concentrator display panel 140 all connected to the CPU 110.
Similarly, there are provided Service Bureaux each containing Scheduling Servers 200, 300 and 400 respectively, each having a CPU (210, 310, 410), local storage (220, 320, 420), multiple workstations (230, 235, 330, 335, 430, 435) and one large concentrator display panel (240, :340, 440) all connected to their respective CPUs 210, 310 and 410.
All of the Scheduling Servers are connected via a high bandwidth network for example Teleglobe's high bandwidth network 700. This network of Scheduling Servers form the Scheduling System. Network 700 also connects all Scheduling Servers (200, 300, 400) to the Transmission Control System 100.
A second network 600 comprising links (610, 621, 622, 623, 630, 631, 632, 640, 641, 642) connects the Transmission Control System to all the individual display sub-systems 520, 521, 522, 530, 531, 532, 540, 541 and 542 via a satellite dish 500 dish control 650 and a Ku band satellite 550.
Each display sub-system comprises a satellite dish, a CPU, a storage mechanism and at least one display screen (260, 261, 262, 360, 361, 362, 460, 461, 462) adapted to be seen by passers-by.
A single Service Bureau can service a given metropolitan area in which a plurality of display sub-systems can be strategically deployed inside buildings or outside where they may replace traditional billboards.
Demographic data is gathered and inputted in the central storage 120 via workstations 200, 300 and 400. Such demographic data can either be global, for a given metropolitan region and/or specific for each display.
The needs and preferences of each advertiser and information provider who wishes to use the digital presentation system are gathered by the sales personnel and are inputted in the database maintaineci in the central storage 120 via the workstations and Scheduling Servers. These preferences include demographics, multimedia content, airtime preferences and budgetary constraints. All of these preferences and constraints are entered into the central storage 120 via the Scheduling Servers 200, 300 and 400. Each workstation operator can reserve air time for display sub-systems located in his/for metropolitan area or indeed in any other display sub-system connected to the Transmission Control System 100 via the network 600.
Each workstation operator also has the option of using optimisation software contained in the Scheduling Servers to suggest a schedule to the client which will take into consideration the aforesaid constraints (demographics, content, air time and budget).
Once the schedule is determined, it is inputted into the system which will then prepare a play list or schedule incorporating the needs of all the advertisers and information providers wishing to use each individual display sub-system. As each display performs its broadcast, a detailed log of all the relevant data is kept in the digital presentation system for future reference and to provide evidence to the advertisers and information providers to the effect that each given multimedia content was broadcast at a given site over a precise period of time.
A camera equipped with image recognition software can also be provided at each site and managed by the display sub-system to actually determine the number and characteristics of the actual audience during each broadcast. This information can be used for statistical and even billing puiposes.
It is, of course, understood that the invention is not to be limited to the exact details of the representative digital presentation system and components thereof set forth above. A
variety of departures from the foregoing disclosure may be made in order to conform to the design preferences or the requirements of each specific application of the invention. It is therefore appropriate that the invention be construed broadly and in a manner of consistent with the fair meaning or proper scope of the claims that follow.
For example, this invention may be used by a television network to schedule commercials or public announcements which are adapted to the needs of each local station.
The needs and preferences of each advertiser and information provider who wishes to use the digital presentation system are gathered by the sales personnel and are inputted in the database maintaineci in the central storage 120 via the workstations and Scheduling Servers. These preferences include demographics, multimedia content, airtime preferences and budgetary constraints. All of these preferences and constraints are entered into the central storage 120 via the Scheduling Servers 200, 300 and 400. Each workstation operator can reserve air time for display sub-systems located in his/for metropolitan area or indeed in any other display sub-system connected to the Transmission Control System 100 via the network 600.
Each workstation operator also has the option of using optimisation software contained in the Scheduling Servers to suggest a schedule to the client which will take into consideration the aforesaid constraints (demographics, content, air time and budget).
Once the schedule is determined, it is inputted into the system which will then prepare a play list or schedule incorporating the needs of all the advertisers and information providers wishing to use each individual display sub-system. As each display performs its broadcast, a detailed log of all the relevant data is kept in the digital presentation system for future reference and to provide evidence to the advertisers and information providers to the effect that each given multimedia content was broadcast at a given site over a precise period of time.
A camera equipped with image recognition software can also be provided at each site and managed by the display sub-system to actually determine the number and characteristics of the actual audience during each broadcast. This information can be used for statistical and even billing puiposes.
It is, of course, understood that the invention is not to be limited to the exact details of the representative digital presentation system and components thereof set forth above. A
variety of departures from the foregoing disclosure may be made in order to conform to the design preferences or the requirements of each specific application of the invention. It is therefore appropriate that the invention be construed broadly and in a manner of consistent with the fair meaning or proper scope of the claims that follow.
For example, this invention may be used by a television network to schedule commercials or public announcements which are adapted to the needs of each local station.
Claims (12)
1) A system to control the display of digital multimedia content on a plurality of out-of-home remote visual display systems connected together via a high bandwidth network, wherein each said visual display system comprises an electronic multimedia display operatively connected to an associated display controller, said electronic multimedia display being arranged to be viewable by a plurality of passers-by, each of said visual display systems being adapted to cycle through playlists of locally stored multimedia content, said playlists having a plurality of air time periods and being stored in said display controller, said control system comprising:
a) at least one scheduling server operatively connected to said visual display systems, said at least one scheduling server comprising computer processor means and data storage means;
b) first means for processing data from a database to determine the availability of said air time periods in each of said playlists on each said visual display systems;
c) second means for processing data to select and reserve one or more of said available air time periods in one or more of said playlists located on each said respective visual display system to define said playlists;
d) third means for processing data to respectively link to each of said reserved air time periods of each playlist the multimedia content to be displayed by each of said visual display systems during said reserved air time periods, said third means for processing data further including means for transmitting said multimedia content and said playlists to the corresponding one of said visual display systems;
e) fourth means for inputting and storing data related to the multimedia content preferences of each user of a visual display system;
f) fifth means for inputting data related to the air time period preferences of each user in said playlist of a visual display system;
g) sixth means for processing data to determine for each visual display system, the actual playlist by optimally correlating said available playlist air time periods, said air time period preferences, and said multimedia content preferences, such that the displayed content is the result of a repeated cycling of transmitted, received and locally stored content in accordance with at least one of said transmitted or actual playlists.
a) at least one scheduling server operatively connected to said visual display systems, said at least one scheduling server comprising computer processor means and data storage means;
b) first means for processing data from a database to determine the availability of said air time periods in each of said playlists on each said visual display systems;
c) second means for processing data to select and reserve one or more of said available air time periods in one or more of said playlists located on each said respective visual display system to define said playlists;
d) third means for processing data to respectively link to each of said reserved air time periods of each playlist the multimedia content to be displayed by each of said visual display systems during said reserved air time periods, said third means for processing data further including means for transmitting said multimedia content and said playlists to the corresponding one of said visual display systems;
e) fourth means for inputting and storing data related to the multimedia content preferences of each user of a visual display system;
f) fifth means for inputting data related to the air time period preferences of each user in said playlist of a visual display system;
g) sixth means for processing data to determine for each visual display system, the actual playlist by optimally correlating said available playlist air time periods, said air time period preferences, and said multimedia content preferences, such that the displayed content is the result of a repeated cycling of transmitted, received and locally stored content in accordance with at least one of said transmitted or actual playlists.
2) A control system as claimed in claim 1, characterized in that each said visual display system further comprises means to request the transmission of said multimedia content or part of said multimedia content if said multimedia content or part of said multimedia content is not locally available on said visual display system.
3) A control system as claimed in claim 1, characterized in that it comprises means for inputting and storing demographic data in relation to the geographic location of each visual display system.
4) A control system as claimed in claim 1, wherein said sixth means for processing data comprises:
a) means to determine, for each said playlist associated to each visual display system the duration of any unreserved air time period, b) means to fill each said unreserved air time period of said playlist with digital content which is compatible with the remaining multimedia content in said corresponding predetermined air time period.
a) means to determine, for each said playlist associated to each visual display system the duration of any unreserved air time period, b) means to fill each said unreserved air time period of said playlist with digital content which is compatible with the remaining multimedia content in said corresponding predetermined air time period.
5) A control system as claimed in claim 1, wherein said sixth means for processing data comprises:
a) means to determine, for each said playlist associated to each visual display system the duration of any unreserved air time period, b) means to remove each said unreserved air time period of said playlist.
a) means to determine, for each said playlist associated to each visual display system the duration of any unreserved air time period, b) means to remove each said unreserved air time period of said playlist.
6) A control system as claimed in claim 3, wherein said sixth means for processing data determine, for each visual display system, the actual playlist schedule by optimally correlating said available air time periods, said air time period preferences, said multimedia content preferences and said demographic data.
7) A control system as claimed in claim 6, wherein said means for processing data comprises:
a) means to determine, for each said playlist associated to each said visual display system the duration of any unreserved air time period;
b) means to fill each said unreserved air time period of said playlist with digital content which is compatible with the remaining multimedia content in said corresponding predetermined air time period.
a) means to determine, for each said playlist associated to each said visual display system the duration of any unreserved air time period;
b) means to fill each said unreserved air time period of said playlist with digital content which is compatible with the remaining multimedia content in said corresponding predetermined air time period.
8) A control system as claimed in claim 6, wherein said means for processing data comprises:
a) means to determine, for each said playlist associated to each visual display system the duration of any unreserved air time period, b) means to remove each said unreserved air time period of said playlist.
a) means to determine, for each said playlist associated to each visual display system the duration of any unreserved air time period, b) means to remove each said unreserved air time period of said playlist.
9) A control system as claimed in claim 1, wherein said high bandwidth network is a satellite network.
10) A control system as claimed in claim 1, wherein said high bandwidth network is a bidirectional network.
11) A control system as claimed in claim 1, wherein said means for transmitting data comprises a transmission control system connected to the scheduling server and the visual display systems.
12) A control system as claimed in claim 1, wherein said multimedia content is non real-time multimedia content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2335667 CA2335667C (en) | 2000-02-11 | 2001-02-12 | Method and apparatus for the display of selected images at selected times |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002298358A CA2298358A1 (en) | 2000-02-11 | 2000-02-11 | Method and apparatus for the display of selected images at selected times |
| CA2,298,358 | 2000-02-11 | ||
| CA 2335667 CA2335667C (en) | 2000-02-11 | 2001-02-12 | Method and apparatus for the display of selected images at selected times |
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| Publication Number | Publication Date |
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| CA2335667A1 CA2335667A1 (en) | 2001-08-11 |
| CA2335667C true CA2335667C (en) | 2008-11-18 |
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| CA 2335667 Expired - Fee Related CA2335667C (en) | 2000-02-11 | 2001-02-12 | Method and apparatus for the display of selected images at selected times |
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