Closed circuit television system having seamless interactive television programming and expandable user participation

• US 4,918,516 A
• Filed: 10/26/1987
• Issued: 04/17/1990
• Est. Priority Date: 10/26/1987
• Status: Expired

• Current Assignee: 501 ACTV Incorporated
• Original Assignee: 501 ACTV Incorporated
• Inventors: Freeman, Michael J.
• Primary Examiner(s): George, Keith E.
• Application Number:
  US07/113,017
• Time in Patent Office: 904 Days
• Field of Search: 358/84, 358/86, 358/146, 358/191.1, 358/181, 455/2, 455/4, 455/6, 434/323
• US Class Current: 725/78
• CPC Class Codes: G09B 5/065 Combinations of audio and video presentations, e.g. videotapes, videodiscs, television systems
• CPC Class Codes: G09B 7/04 characterised by modifying the teaching programme in response to a wrong answer, e.g. repeating the question, supplying a further explanation
• CPC Class Codes: H04H 20/38 Arrangements for distribution where lower stations, e.g. receivers, interact with the broadcast
• CPC Class Codes: H04H 20/63 to plural spots in a confined site, e.g. MATV [Master Antenna Television]
• CPC Class Codes: H04H 20/78 CATV [Community Antenna Television] systems
• CPC Class Codes: H04H 60/13 Arrangements for device control affected by the broadcast information
• CPC Class Codes: H04H 60/33 Arrangements for monitoring the users' behaviour or opinions
• CPC Class Codes: H04N 7/16 Analogue secrecy systems; Analogue subscription systems

Abstract

A closed circuit interactive television system (10) provides a multichannel television signal from a localized head end (12) which is used for individualized interactive selections by a plurality of users (22, 24, 26). Each user station contains a conventional televison receiver (32a, 32b, 32c) and a smart box or interface and selection device (30a, 30b, 30c). The smart box or interface and selection device (30) is disposed between the television receiver (32) and the RF distribution amplifier (36). The number of user stations (22, 24, 26) on the system (10) is virtually unlimited. The system (10) provides the audio/video television signals (14, 16, 18, 20) in at least frame accurate synchronization to enable seamless video switching between channels, which seamlessness is enhanced through the view of a pair of tuners (44, 46) in the interface selection box (30a, 30b, 30c) which are alternately commanded to pretune to the channel of the next actual choice made prior to the changeover under control a microprocessor (40) in response to command signals embedded in the television signals being received.

Claims

1. A closed circuit discrete multichannel interactive television system for providing individualized interactive television programming to a plurality of users connected into said closed circuit interactive television system, said system comprising a localized head end multichannel television signal transmission means for transmitting a multichannel television signal comprising a plurality of selectable channels, a plurality of conventional television receiver means for selectively receiving individualized television programming on a common program display channel, and an interface and selection means disposed between each of said television receiver means and said localized head end multichannel television signal transmission means for receiving said transmitted multichannel television signal comprising said plurality of selectable channels and converting it into an individualized selected television channel for display of said selected channel on said common program display channel on the television receiver means associated with a given user in response to an independent user selection of a given interactive response to a plurality of selectable interactive responses in said multichannel television signal transmission, each of said interactive responses being associated with a different channel in said plurality of selectable channels, each of said users having an associated television receiver means and interface and selection means for making said independent interactive user selection for providing said individualized television programming on said common program display channel, said multichannel television signal transmission comprising a plurality of different interactively selectable audio/video television signals respectively associated with each of said plurality of selectable channels comprising said transmitted multichannel television signal, said interactively selectable television signals being in at least frame accurate synchronization with respect to each other, said interactively, selectable television signals further comprising command signals embedded therein for controlling provision of said individualized television programming on said common program display channel, said interface and selection means being responsive to said embedded command signals for enabling switching of said individualized television channel between said plurality of interactively selectable television channels for display of said associated audio/video television signal corresponding to said selected one of said plurality of selectable channels on said common program display channel in a substantially instantaneous seamless interactive television display presentation on said common program display channel of said associated television receiver means, different television receiver means in said system being capable of displaying different individualized associated audio/visual television signals on said common program display channel at substantially the same time dependent on the various independent interactive user selections of respective ones of said plurality of selectable channels by said plurality of users at any given time, said interface and selection means comprising a microprocessor means and a television signal tuner means, said television signal tuner means comprising a pair of tuners one of which is tuned to a currently selected channel of said transmitted multichannel television signal and the other of which is tunable in advance of receipt of a next successive frame to the next selected channel of said transmitted multichannel television signal for providing selective next channel tuning before each channel switching between said plurality of selectable channels, said microprocessor means responding to said individualized independent user interactive selection and said embedded command signals for pretuning said other tuner in said associated television receiver means to a television signal frequency corresponding to said next selected channel for providing a display on said associated television receiver means common program display channel dependent on said independent user selection before an actual change in said television display on said common program display channel from said currently selected channel in said plurality of selectable channels occurs in response to said independent user interactive selection;

whereby said seamlessness is maintained for said television display on said common program display channel despite interactive changes in said television channel selected for display from said plurality of channels comprising said multichannel television signal.

2. A closed circuit interactive television system in accordance with claim 1 wherein said plurality of different associated selectable television signals in said multichannel television signal comprise a plurality of edit matched individualized television signals, whereby the television frequency said one tuner of said conventional television means is tuned to at any given time will edit match into any other television frequency said other tuner of said television means is subsequently tuned to in response to a change in said user selection.

3. A closed circuit interactive television system in accordance with claim 2 wherein one of said edit matched individualized television signals comprises a source channel television frequency and said other edit matched individualized television signals comprise different branch channel television frequencies being in frame accurate synchronization with said source channel television frequency;

whereby instant vertical interval invisible branching may be provided in response to different user selections.

4. A closed circuit interactive television system in accordance with claim 3 wherein said plurality of different selectable television signals including said source channel comprises four.

5. A closed circuit interactive television system in accordance with claim 3 wherein said source channel comprises the most likely response in a plurality of selectable responses for said user during said television transmission.

6. A closed circuit interactive television system in accordance with claim 1 wherein said multichannel television signal is continuously transmitted to said plurality of conventional television receiver means during a given program interval.

7. A closed circuit interactive television system in accordance with claim 2 wherein said multichannel television signal is continuously transmitted to said plurality of conventional television receiver means during a given program interval.

8. A closed circuit interactive television system in accordance with claim 3 wherein said multichannel television signal is continuously transmitted to said plurality of conventional television receiver means during a given program interval.

9. A closed circuit interactive television system in accordance with claim 4 wherein said multichannel television signal is continuously transmitted to said plurality of conventional television receiver means during a given program interval.

10. A closed circuit interactive system in accordance with claim 5 wherein said multichannel television signal is continuously transmitted to said plurality of conventional television receiver means during a given program interval.

11. A closed circuit interactive television system in accordance with claim 6 wherein said transmitted multichannel television signal comprises a sequence of a plurality of different multichannel television message stacks, each stack comprising a plurality of time concurrent multichannel television messages, said plurality of stacks comprising a stacking array, said stacking array providing a plurality of selectable time and space multiplexed complete prerecorded television messages from said head end, said array being transmitted in said closed circuit system to said interface means, a single substantially complete television message being interactively selectable from said array in response to said user selection for providing an interactive television message as said individualized associated audio/video television signal to said conventional television receiver means in said interface means, the quantity of available interactively selectable prerecorded television messages in said array being greater than the quantity of available different selectable associated television signals, said array comprising a television programming sequence having an interactively variable program information content for a given television program, said interface means comprising means for interactively selecting a multichannel message path through said array for providing said television programming sequence program information content, said interactive selection being multiplexed in both time and channel choices in said array, said interface means selecting said message path through said array in response to a single interactive selection, a different interactive selection providing a different message path through said array and a different program information content for said television programming sequence.

12. A closed circuit interactive television system in accordance with claim 11 wherein said program content for said given television program further comprises a common prerecorded television message commonly displayable during said given television program irrespective of any interactive selections of said interactively selectable television messages.

13. A closed circuit interactive television system in accordance with claim 12 wherein each of said complete television messages in said array comprising said television programming sequence comprises a segway portion for providing an information transition between said common television message and said television programming sequence, said television programming sequence and said common television message being adjacent in real time in a given television program.

14. A closed circuit interactive television system in accordance with claim 1 wherein said transmitted multichannel television signal comprises a sequence of a plurality of different multichannel television message stacks, each stack comprising a plurality of time concurrent multichannel television messages, said plurality of stacks comprising a stacking array, said stacking array providing a plurality of selectable time and space multiplexed complete prerecorded television messages from said head end, said array being transmitted in said closed circuit system to said interface means, a single substantially complete television message being interactively selectable from said array in response to said user selection for providing an interactive television message as said individualized associated audio/visual television signal to said conventional television receiver means in said interface means, the quantity of available interactively selectable prerecorded television messages in said array being greater than the quantity of available different selectable associated television signals, said array comprising a television programming sequence having an interactively variable program information content for a given television program, said interface means comprising means for interactively selecting a multichannel message path through said array for providing said television programming sequence program information content, said interactive selection being multiplexed in both time and space in said array, said interface means selecting said message path through said array in response to a single interactive selection, a different interactive selection providing a different message path through said array and a different program information content for said television programming sequence.

15. A closed circuit interactive television system in accordance with claim 14 wherein said program content for said given television program further comprises a common prerecorded television message commonly displayable during said given television program irrespective of any interactive selections of said interactively selectable television messages.

16. A closed circuit interactive television system in accordance with claim 15 wherein each of said complete television messages in said array comprising said television programming sequence comprises a segway portion for providing an information transition between said common television message and said television programming sequence, said television programming sequence and said common television message being adjacent in real time in a given television program.

17. A closed circuit interactive television system in accordance with claim 3 wherein said transmitted multichannel television signal comprises a sequence of a plurality of different multichannel television message stacks, each stack comprising a plurality of time concurrent multichannel television messages, said plurality of stacks comprising a stacking array, said stacking array providing a plurality of selectable time and space multiplexed complete prerecorded television messages from said head end, said array being transmitted in said closed circuit system to said interface means, a single substantially complete television message being interactively selectable from said array in response to said user selection for providing an interactive television message as said individualized associated audio/video television signal to said conventional television receiver means in said interface means, the quantity of available interactively selectable prerecorded television messages in said array being greater than the quantity of available different selectable associated television signals, said array comprising a television programming sequence having an interactively variable program information content for a given television program, said interface means comprising means for interactively selecting a multichannel message path through said array for providing said television programming sequence program information content, said interactive selection being multiplexed in both time and space in said array, said interface means selecting said message path through said array in response to a single interactive selection, a different interactive selection providing a different message path through said array and a different program information content for said television programming sequence.

18. A closed circuit interactive television system in accordance with claim 17 wherein said program content for said given television program further comprises a common prerecorded television message commonly displayable during said given television program irrespective of any interactive selections of said interactively selectable television messages.

19. A closed circuit interactive television system in accordance with claim 18 wherein each of said complete television messages in said array comprising said television programming sequence comprises a segway portion for providing an information transition between said common television message and said television programming sequence, said television programming sequence and said common television message being adjacent in real time in a given television program.