METHODS AND APPARATUS FOR INFORMATION BROADCASTING AND RECEPTION

Abstract: Broadcasting methods are disclosed which allow a user to choose between passive or active participation. Information is broadcast to (20) or from (13) a database of content (13, 25). Content is carried in segments which are scheduled into programmes. Segments may be updated without altering the schedule which determines a programme. A user may depart from a scheduled programme or depart from a broadcast and enter a unicast, at will. The user may subsequently rejoin a scheduled replay or broadcast.

Description: METHODS AND APPARATUS FOR INFORMATION BROADCASTING AND RECEPTION TECHNICAL FIELD The invention pertains to broadcasting and reception and more particularly to methods and apparatus for broadcasting to or from a database of programmed content so that a viewer may opt between a scheduled programme and a viewer determined programme. BACKGROUND ART In stylistic terms, and from the viewer's perspective, conventional analogue television programming is inflexible. The viewer may watch a variety of channels, each having fixed shows. However the content available to the viewer is limited, at any point in time to the pre-established real time broadcast. Digital television broadcasting and the Internet have introduced the means which by a viewer may interact with information and entertainment services which are delivered to the home. Because digital information is easier to store and manipulate than analogue information, digital televisions and peripheral devices are known to incorporate memory and microprocessor capability for the purpose of allowing the viewer to review, zoom, and show multiple channels simultaneously. Digital networks such as the Internet allow a viewer to request information independently of the requests made by other viewers. Some internet information is broadcast in real time. However, because the bandwidth of the Internet is severely limited (for most users), real time broadcasting of voluminous data such as television quality video is not an option yet. Streaming and buffering techniques give the illusion of continuous broadcasts in a low bandwidth environment. DISCLOSURE OF INVENTION It is an object of the invention to provide methods and apparatus for enabling a viewer to watch an uninterrupted programme of scheduled segments or to depart from the pre-determined schedule and return with or without discontinuity. Accordingly there is provided a method of programme distribution comprising:- (a) granting electronic access to a group of users; (b) distributing to the group, simultaneously, a first programme having a content which has a user independent start time; (c) receiving a request from a user; (d) initiating a second unicast distribution of the same segments to the user where the same segments time shifted and time shiftable relative to the programme which has the user independent start time. There is also provided a method of programme distribution comprising :- (a) granting electronic access to a group of users; (b) distributing to the group, simultaneously, a first programme having a content which has a user independent start time; (c) receiving a request from a user; (d) terminating distribution to the user, in response to the request; (e) initiating a second distribution of a second programme to the user from a database having entries from which the first programme is constituted. The invention further provides a method of distributing a database of content, comprising the steps of: distributing a database to a group of users; distributing a replay schedule of database entries, the schedule used by user software which effects a play sequence of database content in accordance with the schedule. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of a first embodiment of the invention adapted to broadband delivery. Figure 2 is a schematic diagram of a second embodiment of the invention using a set top box. MODES FOR CARRYING OUT THE INVENTION The present invention relates to the distribution of information to a group of users. These users are analogous to television viewers in that they are seeking information or entertainment. However, unlike conventional television, the invention provides the user with a degree of optional flexibility in (a) what the user watches (or listens to), (b) when in time the user participates and (c) how the user participates (actively or passively). In order to achieve this level of flexibility and user choice, network and computer technology is deployed to create a novel type of user experience. In order to achieve consistency throughout this disclosure and claims, the following definitions are observed. A programme is defined as a sequence of segments. The sequence may be expressed as a schedule. A programme may be like a conventional show or a sequence of shows. A programme is considered different to another if it has the same sequence of segments, but the content of one or more segments is different from the other. A segment need not have a fixed length. A segment has a fixed content at any one point in time. The content of a segment may be changed or updated from time to time. For example, a segment "Z" (n) might be called "The Six O'clock News" and represented by a symbol Z a where Z designates "The Six O'clock News" and the subscript a, b, c, etc. designates the specific and unique version. Therefore Z a does not have the same content as Z b . Further a programme may be expressed as a schedule of segments like A a , Y a , Z a , or X a , Y a , Z b , where X a Y a Z a and X a Y a Z b , are considered programmes having the same schedule but different consent. Because Z b , might be updated with reference to Z a , it may be a different duration. Looping to a particular and specific schedule like X (n) , Y (n) , Z (n) can therefore be seen to result in programmes with different content which are said to derive from the same schedule. Content is understood to be taken broadly as any information which can be ascertained by a user and includes without limitation video, sound, images, text, streams and links. From a user perspective, content originates from either a database of content (either remote or local) or from any source on the network from which the user derives programmes. A time such as a start time is considered user independent, if a user cannot influence that time. A time is considered user dependent of a user can designate or influence that time. As shown in Figure 1, a PC client 10 (or a thin client such as a set top box or network computer) may be connected to a broadband network 11 by a high speed digital connection 12. Content from a master content store 13 is delivered over the network 11 in two ways. First, a programme 14 may be delivered by a master schedule server 15 which obtains segments for programme content from the database or content store 13. This may be directed toward clients using multicasting or similar technology. The programme may loop and will run uninterrupted if the user exerts no control. The master schedule server 15 may, by user request, also deliver objects not included in the programme stream or objects which are in the scheduled stream, but not at the time that the request is made. These objects and streams may be accessed by the client or viewer from links embedded in the programme stream 14 via the interactive channel provided over the network 11 and preferably, only from links embedded in the programme stream 14. A user may request Internet content or a time shifted version of a current programme. In order to handle requests for Internet content, the client's request may be transmitted to the master server 15, then forwarded 30 to an Internet server 16. How the Internet content is displayed by the client 10 depends on how the client 10 is configured. In some embodiments, the Internet server 16 is part of the programme network and may be used to (a) log a client's request, (b) notify the master server if it would be advantageous for the master server 15 to terminate a transmission 14 to a particular client 10. A programme may be repeated or looped by user command. A programme might also change as the content of it's segments is altered or updated. A programme may be replaced by a different programme (different sequence of segments) or an updated programme. In this way the viewer, with his client and software, controls (for example) a multicast or broadcast output to himself and effectively allows the viewer to change to unicasting, at will. "Permanent" controls comprising GUI style buttons or links are provided in the user interface. As shown in Figure 2, a specially adapted digital TV or set top box ("STB") 20 receives data from both a live broadcast source 21 and the Internet 22. The STB preferably includes a hard disk, modem, IR remote control interface and video output. The storage capacity of the STB is sufficient to cache all relevant broadcast objects in a database so that it can play back all scheduled content from local storage. Thus, it can mirror the live broadcast as of the most recent broadcast. The STB transmits requests over the Internet line 23. A programme from a live to air system 24 comprises one or more segments, this being a sub-set of a content store database 25 and is broadcast with out interruption. Viewer requests made over the Internet 22 may be received by an Internet server 26 and satisfied wholly or in part from data originating in the content store 25. The content store 25 may provide streaming data, objects or other data. In order to minimise the data transfer required to present a programme, some or all of the programme content may be synthesised by the STB from minimal data (like VRML or virtual reality mark-up language) contained in the broadcast. The STB may use a WINDOWS™ operating or other GUI or object oriented operating system. Accordingly, the medium consists of a dynamically changing, on- demand local database of segments, links and digital objects in all possible formats - including high quality graphics, audio, video and animation. A portion of the database may be given a real time replay sequence by control software - though this sequence can be interrupted by the user at any time. Once interrupted, the relationship to real time might be abandoned completely, or restored at some later time by the user. Other parts of the database will not be replayed unless selected by the user (so will have no real time relationship). Format The "channel" created by the automated replay, from a schedule, of a portion of the content database will be composed of one or more programmes and a range of optional transitions between programmes. Transitions may be one or more segments or programmes. A programme may be composed of one or more segments with a range of transitions between segments. The channel will play automatically the one or more scheduled programmes and may then loop. For the system illustrated in Figure 1 , the automated, uninterrupted sequence of replay of programmes or "shows" will be the same for all users and will be in real time (like conventional broadcasting). In the STB embodiment depicted in Figure 2, the automated, uninterrupted sequence of replay of programmes will be the same for all users that initiate replay of the pre-programmed database at roughly the same time. Unlike conventional broadcasting, the STB user however will have the option of halting replay, jumping forwards and backwards in the sequence, or branching out from various points in the sequence - see below). The content of each programme or show may be varied at any time by the receipt by the database of more recent segments (a live segment might not yet have arrived or might no longer be available). The programme to be replayed at any given time will be the most recent complete version of the show held in the cache at the time that particular show is due to start (as determined by the replay of the sequence or as selected by the user). Each run through of the complete service might therefore be of a different duration and with different content (all or part) in each show, but the order of the programmes or segments may be constant (unless interrupted by the user). The total duration of a replay of all content in a single pass of the entire sequence cannot therefore be predicted. User Controls There will be 2 or more forms of controls - channel controls (constant) and programme controls (specific to each programme), there may be specific segment controls as well. The channel controls in the form of a GUI will include an icon for each programme and fast forward/pause/rewind functions. The icon for the current segment will be disabled. Clicking on an icon will advance the service replay to the designated segment immediately (via an appropriate optional transition). The pause function will stop replay. In the case of a live show which is not archived, recommencement of play will be in real time rather than at the point of pause - ie content might be lost. The fast forward and rewind functions will advance/reverse in segment steps within a programme, via an appropriate transition. The fast forward will be disabled during a live show. The programme controls will pause the programme replay and initiate a sub-show loop, which will terminate at the beginning of the segment in which the loop was initiated. So, for example, during an advertisement 'show', the programme control button may allow the user to pause the ad and enter into a home shopping loop. The service or channel controls will remain visible during any sub-show loop replay, and the show controls initiating the loop will include a "back" or "end" control terminating the loop. The use of any of these controls may result in subsequent segments in fact being different in content to what would have been the case had the controls not been used to alter the 'natural' sequence of replay. This would occur in the case of either (a) - a next segment in the sequence having been updated as a result of the user taking extra time to get to that segment (by, for example, replaying certain prior segments, or going on a sub-show loop); or, (b) - an update that, in the 'normal' course, would have been received, not yet having been received at the time the user reaches the relevant show as a result of the user advancing replay (by use of the icons or fast forward controls) more rapidly than real time. Users will be offered the option of returning to real time, thereby missing content that was 'replayed' while the user had paused or interrupted replay in any way. Access to sub-show loops or other excursions can be preferably made available from any segment or segments in any show (see below). Sample Operation of Channel Controls Pause pause replay (control changes to 'go', press again to recommence replay) Fast Forward advance to a fixed point or in any size steps, then replay Rewind rewind to a fixed point or in steps of any size, then replay Icon advance/rewind to start of designated segment (or programme), then replay Sample Operation of Show Controls Start pause show replay, commence sub-show loop Stop exit sub-show loop, return to commencement of segment from which the user entered the sub-show loop A programme will not be updated while a user is in the sub-show loop (though later shows in the sequence might be). Various modifications may be made in the methods and apparatus for information broadcasting and reception as described above without departing from the scope and ambit of the invention.

Claims: CLAIMS 1. A method of digital programme distribution comprising:- (a) granting electronic access to a group of users; (b) distributing to the group, simultaneously, a first programme having a content of one or more segments determined by a schedule and a user independent start time; (c) receiving a request from a user; and (d) initiating a second unicast distribution of the programme to the user where the programme is time shifted and time shiftable relative to the programme having the user independent start time. 2. A method of digital programme distribution comprising:- (a) granting electronic access to a group of users; (b) distributing to the group, simultaneously, a first programme having a content of one or more segments determined by a schedule and a user independent start time; (c) receiving a request from a user; (d) terminating distribution to the user, in response to the request; (e) initiating a second distribution of a second programme to the user from a database having entries from which the first programme is constituted. 3. The method of claim 1 wherein distribution to the group is a multi-cast. 4. The method of claim 1 , wherein distribution to the group is a broadcast. 5. The method of claim 1 , wherein the first programme is determined by a scheduler and drawn from a database of content. 6. The method of claim 1 , wherein distributing the first programme, further comprises looping the first programme after a first distribution. 7. The method of claim 6, wherein looping of the first programme is accompanied by an update of the first programme after the first distribution. 8. The method of claim 1 , wherein the first programme further comprises segments having a predetermined order and the order is preserved during a distribution subsequent to the first distribution. 9. The method of claim 1 wherein the first programme further comprises segments having a predetermined order and the order of segments is preserved during a distribution subsequent to the first distribution; and wherein segments are updated after the first distribution. 10. The method of claim 1 , wherein the granting of access requires that a user first register or login. 11. The method of claim 1 , further comprising the steps of: terminating the first distribution to the user in response to the request; receiving a second request from the user; and recommencing the first distribution to the first user in response to the second request. 12. The method of claim 2 wherein distribution to the group is a multi-cast. 13. The method of claim 2, wherein distribution to the group is a broadcast. 14. The method of claim 2, wherein the first programme is determined by a scheduler and drawn from a database of content. 15. The method of claim 2, wherein distributing the first programme further comprises looping the first programme after a first distribution. 16. The method of claim 2, wherein looping of the first programme is accompanied by an update of the first programme after the first distribution. 17. The method of claim 2, wherein the first programme further comprises segments having a predetermined order and the order is preserved during distributions subsequent to the first distribution. 18. The method of claim 2 wherein the first programme further comprises segments having a predetermined order and the order of segments is preserved during distributions subsequent to the first distribution; and wherein segments are updated after the first distribution. 19. The method of claim 2, wherein the granting of access requires that a user first register or login. 20. The method of claim 2, further comprising the steps of: receiving a second request from the user; and recommencing the first distribution to the first user in response to the second request. 21. The method of claim 2, wherein: the second programme does not have the same sequence as the first programme. 22. The method of claim 2, wherein: the second programme further comprises segments and a segment is updated after the first request is received from the user. 23. The method of claim 1 , wherein: distributing to the group includes distributing index data which is descriptive of the content. 24. The method of claim 2, wherein: distributing to the group includes distributing index data which is descriptive of the content. 25. A method of distributing a digital database of programme content, comprising the steps of: distributing a database to a group of users; distributing a schedule of database entries, the schedule used by user software which effects a programme comprising a play sequence of database content in accordance with the schedule. 26. The method of claim 25, further comprising the step of: transmitting a flag which determines if a user begins a replay at a predetermined time or a user determined time. 27. The method of claim 25, further comprising the step of: providing control software for the user to manipulate the characteristics of a replay. 28. The method of claim 25, further comprising the step of: providing control software which allows the user to depart from the scheduled replay when accessing database content. 29. The method of claim 25, wherein: the database comprises content and an index.

Inventors: COHEN THOMAS ANDREW, COHEN, THOMAS, ANDREW
Applicants: ACEINC PTY LTD, COHEN THOMAS ANDREW, ACEINC PTY LIMITED, COHEN, THOMAS, ANDREW
Application year: 2000
Main classification: H04N7
IPC codes: H04L12, H04N5, H04N7