US 20050235318 A1
An interactive media delivery system enables interactive media programming to a multimedia device and also tracks a subscriber's use of the multimedia device. For example, the device tracks events, such as a change in programming, a change in channel selection, and/or the subscriber's interaction with a particular interactive services application. Each event may be stored as an event record in a database, and one or more of the event records may be merged with content data to form event timelines of programming or other activity to the multimedia device over a selected time period. Further, timelines may be analyzed to generate ratings and other information about programming and may also be correlated with demographics data for marketing analysis.
1. A method for collecting information about viewing habits of subscribers to a media delivery network for delivering programming to numerous set top boxes, each capable of supporting different applications invoked and controlled by subscriber commands, the method comprising the steps of:
a) programming each application to identify selected subscriber commands of interest;
b) determining an application identifier corresponding to a particular application to which a selected command is addressed; and
c) creating an event record comprising:
1) the application identifier;
2) an identification code corresponding to the selected command; and
3) a time stamp.
2. A method according to
3. A method according to
4. A method according to
5. A method according to
6. A method according to
7. The method according to
8. A storage medium on which is encoded instructions for performing the following:
a) programming an application to identify a selected subscriber command of interest, the application selected from a plurality of applications operating on a multimedia device;
b) determining an application identifier corresponding to the application to which the selected command of interest is addressed; and
c) creating an event record comprising:
1) the application identifier;
2) an identification code corresponding to the selected command of interest; and
3) a time stamp,
wherein the multimedia device communicates with a media delivery network, the media delivery network communicating at least one of programming content and the application to a plurality of multimedia devices.
This application is a continuation of commonly assigned U.S. patent application Ser. No. 09/496,825, entitled “Method and System for Tracking Network Use”, (Attorney Docket BS95003CON) filed on Feb. 1, 2000, incorporated herein by this reference.
A portion of the disclosure of this patent document and its figures contain material subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, but otherwise reserves all copyrights whatsoever.
The exemplary embodiments generally relate to tracking subscriber use of network applications, particularly network applications involving delivery of interactive media or video programming.
Broadcast and cable television have long dominated the visual media market. New communications technologies, however, have accelerated demand for new types of media such as video on demand, interactive video, interactive gaming, home shopping or interactive advertising. Unlike broadcast television, viewers of these services typically are paying “subscribers,” although payments from advertisers also pay a large share of the costs of providing these media services.
To gauge the effectiveness of their spending, advertisers have long sought information on viewers' viewing patterns. A number of devices and techniques exist for gathering such information. For instance, U.S. Pat. No. 4,258,386 to Cheung and U.S. Pat. No. 4,556,030 to Nickerson, et al., describe the general concept of deploying in viewers' homes devices for monitoring a viewer's television set (“TV”) in order to accumulate data illustrating viewing habits such as which channels were watched at particular times. Accumulated data is then forwarded via telephone lines to a central location for analysis. Cheung sends data from particular monitoring stations at a preselected, specific “window” of time; interruptions to transmission during that window result in the Cheung system forwarding the data at another time.
Other systems and methods provide somewhat more use data than just channel numbers viewed and time of viewing. Typically, however, the information is for a smaller subset of users. Thus, U.S. Pat. No. 4,816,904 to McKenna, et al., U.S. Pat. No. 4,912,552 to Allison, III, et al. and U.S. Pat. No. 5,374,951 to Welsh, all disclose monitoring “panelist” TV use in order to collect data about panelist viewing patterns as well as certain marketing information. Generally, panelist monitoring is used to gauge the effectiveness of advertising on selected groups of “panelists,” each of which is one household in a group comprising a “panel,” typically located in a particular geographical area.
Monitoring not only determines which commercial and TV programs the panelist views but also may be used to gather information about which products panelists purchase. For instance, the U.S. patent to McKenna discloses a remote data collection unit located at a panelist home that monitors viewer identification data and TV functions (e.g., channel viewed, VCR viewing time or game time). Additionally, a wand is provided for inputting bar codes of purchased items. Monitored data is sent via the telephone network to a central location, which can also download questionnaires to the panelist and receive responses. Allison and Welsh disclose similar monitoring systems and methods. Instead of simply monitoring the channel number that a panelist was viewing at a particular time, Welsh discloses monitoring identification information carried in the television signal vertical blanking interval that identifies preselected commercials. After detecting and storing the identification information that identifies particular commercials viewed by panelists, the data is transmitted by telephone to a central location for analysis.
Monitoring systems also have been used with some early interactive media systems. U.S. Pat. No. 5,404,393 to Remillard discloses an interactive TV system. Among other elements of the system, a controller monitors TV channels and time/date stamps the selected channel so that, indirectly, viewers' programming choices may be monitored. Data is assembled into a “user profile,” which is uploaded to an appropriate facility via the telephone network.
Nevertheless, while panelist monitoring systems like those of Allison, McKenna and Welsh or interactive television monitoring systems like Remillard's provide somewhat more monitoring data than just TV tuning data, they do so only for limited groups. For example, when more data is gathered (like purchase information), it is done only for the panelist groups, rather than for subscribers to the entire system. Also, systems like McKenna's that uses a wand for scanning bar codes are intrusive systems that require user action to collect data rather than collecting data passively and automatically. Other systems contemplate capturing only some of the data generated by subscriber's viewing activities or only some of the ratings information. For instance, previous systems typically capture ratings information that identify television shows viewed rather than whether the subscriber viewed commercials displayed during those shows.
Perhaps more importantly, none of the systems described attempt to match “raw” information on channels viewed with programming information. Nor do those systems match viewing pattern information with demographics information about the particular users in order to provide more “targeted” advertising.
Exemplary embodiments use a collector, associated with a subscriber's set top box (“STB”), to obtain data about any “events”—subscriber actions or changes in programming—that are of interest. Data about virtually any events, from channels watched to volume changes to interactive applications invoked, may be captured with the collector. Event records comprising such data, as well as the identity of the application involved and the event time, are buffered. Periodically or on command, event records are uploaded from the buffer to a merge processor such as through an interactive network that allows for duplex communication with the STB. The merge processor, which may be a head end server or a workstation computer forming part of or coupled to the media delivery network, receives (1) the event data and (2) content data that identifies programming content broadcast or delivered throughout the region in which the system is deployed. Timelines showing particular events over time may then be generated for each subscriber. Rather than just determining the channel viewed and time of day, the event timelines describe the programming or interactive applications selected by or shown to a subscriber over a selected period of time (e.g., 24 hours).
The merge processor may further filter this collected and merged data to generate reports ranging from descriptions of a single user's viewing patterns to very high level viewing patterns showing the number of users who watched or participated in a particular program for a selected time period. Further, that information can be combined with billing and demographics information to provide detailed information on a particular subscriber's or group of subscribers' viewing and related buying patterns.
Exemplary embodiments of this invention thus involve a method for obtaining detailed information on every application invoked by a subscriber and information about the type of programming shown. The first step is to identify data that describe the events of interest that occur. Those events include: the channel viewed, a switch to another channel, a passive change in programming because of a commercial break or change to a new program, use of a VCR or other ancillary device, or invocation of an interactive application and subscriber commands given to the system during the application. Event data also includes start and stop times, identification of the subscriber's STB or specific data needed to be recorded for any particular interactive or other application.
Event records are formed from this collected data and buffered before uploading through the interactive or other media delivery network to a headend, server or third party data analysis system. Before uploading, the captured data may be compressed and formed into packets for transmission.
Using the system or method of exemplary embodiments of this invention allows service providers to obtain ratings information and detailed information on subscriber viewing patterns and subscriber use of interactive applications. Thus, exemplary embodiments of this invention can track the number of subscribers viewing or watching particular programs, including advertisements. It also can track use of particular interactive applications such as video on demand. The invention automatically matches data describing programming content with event data describing a channel or application activated or controlled by the subscriber. This allows the invention comprehensively to track user “channel surfing.” Also, the invention can compare subscriber demographics or billing information with viewing pattern information in order to tailor commercials to those subscribers; determine whether subscribers with a selected demographic background viewed a commercial of interest; or determine the demographics of subscribers that viewed selected commercials.
Persons skilled in the art will recognize that exemplary embodiments of this invention may be used with numerous types of networked media delivery systems. For instance, exemplary embodiments of this invention can be deployed on an interactive media delivery system or modified for use with a conventional cable television network, a wireless cable television network, or a home satellite television network.
It is accordingly an object of exemplary embodiments of this invention to provide a system and method for collecting information about patterns of subscriber viewing and use of a media delivery system.
It is another object of exemplary embodiments of this invention to provide a system and method for determining which network applications, particularly interactive applications, are invoked by particular subscribers.
It is an additional object of the invention to provide a system and method for communicating collected information to a merge processor.
It is a further object of the invention to provide to the merge processor information about the programming content distributed over the media delivery system.
It is yet another object of the invention to provide a system and method for merging the collected information with the programming information in order to obtain comprehensive information about programming shown to or network applications invoked by subscribers.
Other systems, methods, and/or computer program products according to embodiments will be or become apparent to one with skill in the art upon review of the following drawings and detailed description. It is intended that all such additional systems, methods, and/or computer program products be included within and protected by this description and be within the scope of this invention.
The above and other embodiments, objects, uses, advantages, and novel features are more clearly understood by reference to the following description taken in connection with the accompanying figures, wherein:
The exemplary embodiments now will be described more fully hereinafter with reference to the accompanying drawings. The exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
Thus, for example, it will be appreciated by those of ordinary skill in the art that the diagrams, flowcharts, illustrations, and the like represent conceptual views or processes illustrating systems, methods and computer program products embodying some of the embodiments of this invention. The functions of the various elements shown in the figures may be provided through the use of dedicated hardware as well as hardware capable of executing associated software. Similarly, any switches shown in the figures are conceptual only. Their function may be carried out through the operation of program logic, through dedicated logic, through the interaction of program control and dedicated logic, or even manually, the particular technique being selectable by the entity implementing some of the embodiments of this invention. Those of ordinary skill in the art further understand that the exemplary hardware, software, processes, methods, and/or operating systems described herein are for illustrative purposes and, thus, are not intended to be limited to any particular named manufacturer.
In any event,
STB 30 provides a platform by which (1) content is converted to a selected video format (e.g., NTSC or PAL) and presented to the subscriber or (2), for interactive systems, messages are exchanged (including video data) over a network 52 with the staging server 70. STB 30 also could include platforms capable of: (1) receiving messages from a user input device, such as a hand-held remote control unit; (2) translating video signals from a network-native format into a format that can be used by the television or display device; (3) inserting alphanumeric or graphical information into the video stream in order to “overlay” that information on the video image; (4) providing graphic or audio feedback to a user; or (5) possibly the most basic function, simply routing a traditional broadcast signal to a viewing device connected to the STB 30. Analogous terms to STB include: Set-Top Terminal (“STT”), Cable Converter, and Home Communications Terminal (“HCT”) and any of these devices may be coupled to or made a part of a display device for showing programming to subscribers. Generally, STB 30 may be a Richmond or 8600× available from Scientific Atlanta, a CFT 2200 available from General Instruments, Thomson's DSS or any other device equipped with (1) a microprocessor; (2) memory for operating instructions and storage; and (3) a control interface for accepting subscriber commands from a remote control device or control panel.
For the particular embodiment of system 20 shown in the Figures, collected event records that are packaged for transport through system 20 are called “clickstream” data or information.
Briefly, the clickstream kernel 36 buffers events passed to it by various network applications through the clickstream event API 41. Clickstream controller 38 accepts control messages from staging server 70 and appropriately stores their payload. Typical messages may be sent over the Extended Super Frame (ESF) pass-through data link and control the uploading of clickstream data. Clickstream upload handler 40 accepts control messages over the system 20, which messages control the uploading of collected clickstream data over the reverse path through network 52. Also, the clickstream upload handler 40 stores the payload of these messages in appropriate and available memory and accepts the messages sent to it to acknowledge the receipt of uploaded clickstream data.
Referring again to
Clickstream processor 34 collects information to create a “journal” or log about all events or selected events of interest. An event is an action or a change in the state of a STB 30 that is deemed important to building a knowledge base on subscribers or their viewing patterns. For example, an event can include key presses to change channels or volume, mute, to enter the navigator for the interactive system, to turn the STB 30 off or on, to fast forward, to pause or to rewind a video obtained via the video on demand application. The events include applications called by the subscriber, such as interactive gaming applications, an electronic program guide, a video on demand or near video on demand application, a home-shopping application or a particular company's interactive application, such as The Weather Channel's weather on demand, World Span's travel on demand or Light Span's educational interactive application. Events include subscriber use of and control commands to peripheral devices coupled to the STB 30 or a subscriber's display device, such as a VCR or videodisk player.
Each application residing on the STB 30 interfaces with the clickstream processor 34 to send selected data for maintaining a desired journal. Assuming that the system 20 is used with an interactive system, many different applications may be deployed over that system and may be triggered by the subscriber. Some fairly typical applications that might be invoked include:
Clickstream processor 34 interfaces with the various applications resident in the STB 30's operating system 32 and any third party applications 33. Note that for systems using other types of STB 30's than the embodiment described in the Figures, those STB 30's need not have an operating system. Instead, all instructions can be written directly to the memories of those particular STBs. Applications 33 can be added by either downloading entirely new software directly to memory or by downloading new tables as described below.
When an application 33 reaches a point where an “event” of interest has been generated, the application 33 stores an event record to memory. The application 33 then launches to the clickstream kernel 36 the event record, including information such as: (1) the application's 33 identification code (e.g., the “Cable Television Application” or a particular interactive application); (2) a count of the amount of information (number of bytes) to be journaled; (3) a “time stamp” that defines a unique point in time, e.g., by defining the date and time of day, accurate to the hour, minute or second; (4) an identification code for the event, or (5) where the event data was stored. Clickstream kernel 36 uses the information provided by the applications 33 to collect the event data, format it and place it into a buffer 42 or 44. Table I shows the type of information that will be generally sent by the clickstream processor 34 to the buffers 42 or 44.
Global table II defines events of interest that each application can identify, collect, store in the “Application Specific Data” field and notify the clickstream kernel 36. These events could be as simple as a broadcast channel change by pressing the “Chan Up” remote key. All of these event types can be accessed and used by each application. While each application may not use every possible event type, the number of events available for collection allows system 20 to extract any pertinent usage information for analysis. Also, the use of the global table II increases system 20 efficiency because event types can be modified, added or removed.
Note that Table II defines relative volume changes (e.g. “volume change below 50%,” “volume change below 25%,” etc.). Although the applications could capture the actual key presses that lead to these relative volume changes, that level of detailed information is of little use to system 20 operators. Also, capturing all that detail leads to more records and higher demands upon the transmission network 52 when those records are uploaded. Applications could also be configured to “filter” other unwanted details about other subscriber activities. For example, when subscribers “channel surf” by quickly flipping through a number of channels in a short period of time, the application could be configured not to record channel changes unless the subscriber paused for greater than a certain selected time period (e.g., 15 to 30 seconds). Again, this eliminates information of little use and decreases network traffic.
Table III defines a small portion of a sample global channel identification table that proposes codes for identifying national and local broadcasters. Such a table allows any application journaling events which occur while subscribers are viewing broadcast or cable television programs to identify the network carrying the programming content by using a subset of the global table II. In this way channel lineups can be changed yet the identifier for a broadcast or cable network would stay the same. The use of this mapping scheme eliminates the need to map an ever-changing channel number to a network.
Table IV below shows some possible identification codes for particular applications. Note that each application could be programmed to insert its application ID code into the event record without accessing table IV. But by having each application access the table IV during the journaling process, the system's 20 ability to modify or add application ID codes easily is enhanced because such codes could be populated across system 20 by downloading an updated table IV. Providing for downloading of new tables increases the application footprint and system 20 complexity so tables can also be part of the application programming.
Each particular application can simply reference the global application, event and channel identification tables (which periodically may be updated and then downloaded to STBs 30) in order to build an event record. Examples of application specific event records that may be created in this manner are shown in Tables V through VIII below and discussed in associated text.
A cable TV application 33 may tune analog or digital broadcast services. When a command to change channels is entered, the cable TV application 33 is invoked. The cable TV application 33 begins building an event record by inserting an application ID and time stamp into the record. Next, the application 33 determines the “event ID” by cross-referencing the command with the global event ID table II for the proper code. Then, the application 33 journals the “Channel ID.”
Although the Channel ID could simply be the number of the channel, that information means little. The fact that channel 6 was watched more than channel 7 has little or no meaning unless networks and, ultimately, the content delivered by those networks are associated with particular channels. Accordingly, the Channel ID may be a field, like a 16 bit field, which uniquely identifies the broadcast network displayed on that particular channel. The Channel ID may be determined by programming the cable TV application 33 to compare the channel number tuned with global broadcast channel identification table III, above, to determine the correct channel identification code. Correlating the channel number with the channel identification code found in Table III ensures accurate reporting even though channels may differ at different cable TV headends within a particular region or even though individual channel line-up changes may be made over a period of time. This correlation between channel number and channel identification code could be done also at the staging server 70 after it receives all of the event records, provided that correlation there accounted for different regional channel lineups.
Table VI below shows a navigator application that may be provided in order to give subscribers an interactive menu that assists them in selecting from the many available programs and applications in an interactive network. The “Event ID” refers to the identification codes for commands relating to the Navigator application, which codes may be located by referring to the global event ID table II above. Table VI also shows some of the features of the navigator that might be used by the subscriber and that could be useful to track. The right hand column under “Size/Data” shows, first, next to the “Application state ID” that 8 bits are allocated to that record and, second, in the various rows beneath, the particular code that is journaled in order to indicate a subscriber accessed the identified (e.g. Fly-Thru, Main Menu, etc.) screen. Such information lets system 20 operators determine the screens that users are viewing heavily or lightly in order to replace less popular screens with more useful ones or to charge more for advertisements placed on heavy use screens.
Table VII similarly shows the journaling information collected for a video on demand application 33 that may be launched in an interactive service from the Navigator application above or its equivalent. Some of the information collected here may include the amount of pausing, fast forwarding and rewinding. Additionally, the service provider may want to determine whether viewers are recording a video in order to charge them a recording fee. Similar information could be collected for a near video on demand service, which typically allows only incremental pause, forward or rewind.
Table VIII below shows the event record for the Electronic Program Guide (EPG) application 33. The EPG application 33 records the application ID, timestamp and event ID records just as do the above applications described in tables V-VII. Additionally, it has an application 33 state ID field that identifies which of the display screens were accessed by subscribers, as shown below.
Generally, similar information about other applications 33, such as home shopping, interactive gaming or any other new applications deployed over an interactive or other media delivery system, can be tracked in a similar fashion. Additionally, the journaling process may be used to track errors within the system 20, with clickstream kernel 36 journaling such errors using the same method as described above.
Over time, the journaling needs of system 20, or system 20 itself may evolve. Applications may be changed or new ones deployed. New events may become of interest to the operator of system 20. In order to provide flexibility for system 20, operators may download to STBs 30 new or replacement applications that will include the necessary processes for journaling all events of interest.
Assume that Mr. Smith turns on his interactive television at 7:30 p.m. to watch a half hour news program on channel 5, which corresponds to CNN for that region. At 8:00 p.m. he accesses the Navigator application to order a video through the video on demand application. He then accesses the Video on Demand application, which automatically begins playing a video at 8:04, pauses the video at 8:50 and begins playing again at 8:55 until it is completed at 9:45, at which point he turns off his interactive TV.
Mr. Smith's activities generate the following event records shown in table IX below (for convenience, multiple events occurring under a single application are grouped even though separate records are created in operation):
The variably sized event records are collected and then stored in one of two clickstream buffers 42 or 44. Capacity of each of the buffers may be statically provisioned or the system 20 may addressably download to particular STBs 30 an appropriate buffer 42 or 44 size. A buffer 42 or 44 may be an allocated, contiguous free area of STBs' 30 memory set aside for buffering event records only. Although advanced database techniques like link lists or record pointers could be used, they would increase the application footprint and complexity. Because buffer sizes of about 15 kB would probably accommodate the journaling needs of most applications, advanced database techniques need only be used for larger buffers. Buffers up to 15 kB should allow at least 4 to 8 hours of peak channel “surfing” between uploads (channel surfing typically will generate the most event records). In any event, empirical analysis of network use should determine the optimum buffer size.
Event records are directed to one of the two buffers 42 or 44, although a single or even more buffers could be used with the system 20. Conceivably, the system 20 could also be modified to upload event records in real time; however, that severely increases the possibility of instantaneous overloads in network traffic. Thus, system 20 preferably uses buffers 42 or 44 to buffer collected event records until they are upload.
Event records from a particular STB 30 may be uploaded in a format that assists in their transmission back through the distribution network 52 to the staging server 70. A header record may indicate the time the buffer 42 or 44 was first opened, the number of bytes in the buffer 42 or 44, the originating STB 30 by address, the version of the clickstream kernel 36 which generated the record and the type of data compression used on the following data (if any). This first header record may be of fixed length and uncompressed. Information following “Compression Type” may be compressed to save in transmission bandwidth. Table X below shows this general header format:
When (1) a buffer 42 or 44 fills, (2) an upload timer event expires or (3) upon command from the staging server 70, the clickstream processor 34 initiates an upload process. During that process the uploading buffer 42 is locked and subsequent event records are routed to and stored in the second buffer 44. When upload of buffer 42 is completed, records continue to buffer 44 until the next upload time, after which buffer 44 locks and records go to buffer 42. This cycle continues to repeat.
An example of the use of these parameters would be to define a period of time every day for STBs 30 within system 20 to upload data. Typically, the system 20 operator may want the data available every morning for analysis. Peak use of broadcast prime time or of interactive services will typically be from 7 p.m. until 12 p.m., during which time no uploads should occur in order to minimize the burden on the network 52. Beginning at 12 p.m., uploads of event records out of a buffer 42 or 44 would begin. In order to have all STBs 30 upload before 8 a.m., the STBs 30 may be divided into upload groups, e.g., 32, with each group uploading over a selected (e.g., 15 minute) period. To achieve this upload cycle, the following parameters are defined in the
STBs 30 can be instructed as to their role in uploading by sending from staging server 70 appropriate commands that are handled by the clickstream upload controller 38. For instance, the following commands may be addressed and sent by staging server 70 to a single or group of STBs 30.
After the upload process triggers, each STB 30 typically initiates upload by first locking the buffer 42 or 44 to be uploaded and then compressing the contents of that buffer 42 or 44. A number of different compression techniques may be used, however, about 50% compression may be achieved with LZW compression utilities. Such compression substantially reduces the load on network 52 caused by numerous STBs 30 uploading event records. Compressed data is divided into transmission “transactions” or “packets” and packet headers are addressed to indicate packet identification, IP destination address, etc. The actual network connection can be initiated by the operating system for the particular STB 30. Persons skilled in the art will recognize that the type of and manner of invoking and implementing the network connection will vary depending upon the type of media delivery network over which system 20 is deployed.
For instance, the STB 30 can be configured to insert UDP/IP headers and trailers taken from the RFC 791 or RFC 768 specifications published by the ISO. Each data packet may have UDP/IP protocol built around a Level 1 pass-through header, such as shown in Table XIII below:
In the embodiment shown in the Figures, the clickstream processor 34 will identify a particular Video Service Provider (VSP)—an entity connecting to network 52 to distribute services—like VSP 66 shown in
Providing two buffers 42, 44 allows event record collection to continue during upload. Assuming buffer 42 is being uploaded, if the second buffer 44 fills during the upload process, a buffer overrun condition occurs. To account for such an occurrence, the buffer trailer record sent during upload from STBs 30 may denote such an error condition. The structure of the buffer trailer record may take the form as shown in Table XV below and include a time stamp, assigned application identification, length and upload code.
These upload status codes identify the stage of the upload process at the time a buffer 42 or 44 overflow occurred. Thus, some possible upload codes could include: upload not used, upload in progress, upload completed but no acknowledgment received, upload completed but only partial acknowledgment received or no upload attempted. This will let the staging server 70 know that STB 30 event records are missing beginning at that time. Also, receiving a buffer overrun record informs the staging server 70 that buffer 42 or 44 sizes have not been set appropriately. Buffer 42 or 44 sizes can then be reset and released to the system 20 as an update or released to a particular STB 30 by sending it an appropriate command.
Note that the packetization description above is for one embodiment of the system 20. However, generally, to upload collected event records, STBs 30 can initiate whatever “upstream” data transmission process used by the interactive, cable television or other media delivery system with which the system 20 is used. That process will upload the event records in the appropriate system format.
In any event, for system 20, clickstream data packets are uploaded to the staging server 70 over a slotted-ALOHA (a contention-based standard transport protocol) data transmitter of the STB 30. Data acknowledgments from the staging server 70 are sent; each is addressed to particular STBs 30. The frequency and period of data acknowledgments may be determined by considering network error rates, network packet error rates and causes of those types of transmission errors.
As noted, once a buffer 42 or 44 fills or the clickstream processor 34 decides to upload data for other reasons (time expiration, low system utilization, commanded upload, etc.), the buffer 42 or 44 will be formatted, compressed and then uploaded through the system 20 to the staging server 70. The upstream data packets may travel from the network management controller 50 across the distribution network 52 to video server 60 through a process called IP (“Internet Protocol”) tunneling, which is essentially automatic IP routing based upon information in the packet payload. The same process can be used to route packets through network 52 directly to staging server 70 without going through video server 60.
When the ECAP process 71 receives a clickstream data packet, it accepts the data packet and correlates the source address of the data packet with an upload session already in progress with a particular STB 30. If there is currently no upload in progress with that STB 30, then one is considered to be initiated. ECAP process 71 processes the upload of data in accordance with the particular protocol needed for the system 20. After receipt of all clickstream data packets associated with the upload from a particular STB 30, the ECAP process 71 sequences the packets into proper order (particular packets may have arrived out of their original transmission sequence because of transmission delays in network 52), decompresses the packets, eliminates transport overhead (e.g., trailers, headers, etc.) and stores them, such as in a flat file, for later analysis. At the end of a selected period, like 24 hours, the file is closed and a new one is opened, which allows a subsequent merge and parse process to batch process discrete files that cover discrete time periods. Immediately after initiation of and during the ECAP process 71, an operation log is opened to record information about the initiation and termination of each upload session and any errors.
As shown in
Collectively, all of this data enters into a merge and parse engine 90 that creates an event timeline 92 for each STB 30. Merge and parse engine 90 may be deployed upon staging server 70 or the MKIS system 100. So deploying merge and parse engine 90 on staging server 70 allows collected event records to be merged and parsed. The resulting event timelines 92 can be sent to MKIS system 100 for further analysis.
Timeline 92 provides a snapshot of activity on a particular STB 30 for a selected period (e.g., 24 hours) or for a selected event—for instance, a timeline 92 would be created for each STB 30 tuning to a particular show or shows (e.g., a pay per view fight) that may occur over a selected period. Timeline 92 is created by merging event records with metadata about programming available over the network for the selected time period.
To merge that data, proper priority must be assigned to data that otherwise may be conflicting. For instance, broadcast advertising data 84 may indicate that a certain national ad was run at Time A. On the other hand, if the system 20 is an interactive system and the interactive server provided a targeted advertisement (“ad”) also at Time A, as indicated by session-services advertising data 86, that targeted ad was inserted over the national ad at Time A. Thus, by assigning session-services advertising data 86 a priority higher than national broadcast advertising data 84, the merge and parse engine 90 is able to create an accurate timeline 92 of programming delivered to a particular STB 30. Similarly, even a traditional cable or wireless cable network requires priority assignments. Typically, local cable operators typically are allowed to insert local ads over certain national ads (assuming they can sell that local ad time).
Applying these priority rules produces a timeline 94 for each subscriber. Additional filtering criteria 94 are applied by the merge and parse engine 90 in order to generate a further refined timeline 94, as depicted in
Merge and parse engine 90 also may apply other criteria to the filtered timeline 94 (or the original timeline 92), as shown in
Note also that other criteria than simply how much time a tuned to a particular channel may be included in the view and watch criteria 96. For instance another criteria may be volume level. If a viewer was tuned to a channel for the full thirty second length of an ad but hit the mute button or changed the volume below a certain threshold for that ad, view and watch criteria 96 may classify that ad as a “viewed” ad.
Generally, merging and parsing should be done on discrete segments of data, such as 24 hour segments, as soon as possible in order to minimize the occurrence of un-resolved events. In other words, discrete events are simply pieces of the entire picture. To analyze only several hours of clickstream event data would not allow determination of such things as programming “watched” versus “viewed.”
A timeline 94 for each STB 30 is built and uploaded by staging server 70 to the MKIS database 100 or a third party analysis engine and database 110, either of which may store demographics and be used to run queries against the event timelines 94 and those demographics. Combining the timelines 94 with demographics information allows for even more detailed and granular information about subscribers and their viewing habits. For instance, consider the following examples:
Widget Co. has ten different advertisements that it has been running on system 20. Widget Co. wishes to know whether subscribers are “viewing” or “watching” particular ads. Because of the detailed information captured by the system 20 of exemplary embodiments of this invention, a query can be formulated to determine (a) which subscribers “watched” particular 30 second advertisements for greater than 15 seconds versus (b) which subscribers simply “viewed” the ad, for less than 15 seconds.
When event timelines 94 (or view and watch lists 98) are loaded into MKIS 100 or analysis engine 110, the same query can be run for a particular demographic group. For instance, Widget Co. wishes to know which particular ads its primary customer base, baby boomers between ages 40 and 50 and with income over $50,000 per year, “watched” versus “viewed” their advertisements.
Obviously, the system 20 can also be modified to target ads to particular demographic households based on feedback from parsed and merged data. Then, event records occurring after those targeted ads are broadcast over system 20 can be checked to determine whether the particular demographic market targeted watched or viewed the advertisement.
While several exemplary implementations of embodiments of this invention are described herein, various modifications and alternate embodiments will occur to those of ordinary skill in the art. For example, the architecture and programming of the system may be modified. Or, a variety of different manufacturers' servers, set top boxes (including other media delivery devices), and/or databases may be configured in order to implement exemplary embodiment of this invention. Further, the exemplary identification codes and allocated sizes show in the tables and described herein may also be greatly modified. Accordingly, this invention is intended to include those other variations, modifications, and alternate embodiments that adhere to the spirit and scope of this invention.