KR20200041242A - Apparatus and method for surveying audience rating using channel conversion data - Google Patents

Abstract

The present invention relates to an apparatus for calculating a rating and a method thereof and, more particularly, to an apparatus for calculating a rating and a method thereof, which can process channel switching data of a set-top box and examine a rating per household in real time. To this end, according to the present invention, the apparatus for calculating a rating is a rating calculating apparatus of a video management server connected to set-top boxes provided in each household through a network. The apparatus comprises: a receiving unit receiving channel switching data from the set-top boxes; a watching history data processing unit processing the channel switching data to generate watching history data for each set-top box and processing the generated watching history data for each set-top box to generate watching history data for each channel; and a rating calculating unit determining the total number of set-top boxes by counting, as one, two or more set-top boxes belonging to a household, and calculating a rating at a specific time period by using the watching history data for each channel and the total number of set-top boxes.

Description

Apparatus and method for calculating audience rating using channel switching data {APPARATUS AND METHOD FOR SURVEYING AUDIENCE RATING USING CHANNEL CONVERSION DATA}

The present invention relates to an apparatus and method for calculating viewer ratings, and more particularly, to an apparatus and method for calculating viewer ratings that can inspect viewer ratings per household in real time by processing channel switching data of a set-top box.

Conventional television broadcasting audience rating survey methods include weather surveys, interview surveys, and meter surveys. The diary survey is to distribute the printed booklet to viewers to create their media exposure record, which has the advantage of being the cheapest compared to other survey methods, but has a limitation in that it depends on memory. For example, if the channel number is incorrectly stored, or if the program and the channel are mistaken, the reliability of the audience rating survey is compromised. In addition, there is a disadvantage that it takes a relatively long time to collect and process data.

The interview survey is to investigate the ratings through a visit or a telephone interview. Compared to self-reported diary surveys, viewing records are more reliable data collection. However, the interview survey method also has limitations that originate from human memory, non-cooperation with interviewees, and higher investigation costs.

On the other hand, the investigation using a meter is an investigation using an electronic device having an audience rating investigation function called a peoplemeter. In the meter survey method, a people meter is attached to a TV set of a household selected as a panel, and the viewing records of members of the panel furniture are automatically checked by the people meter, and the viewing records are sent to an audience rating investigation agent to check the viewer ratings. . However, the survey method using the meter also has a problem that the installation of the meter is complicated and expensive, and requires absolute cooperation from the viewer.

On the other hand, cable TV and IPTV broadcasting have been actively provided in addition to traditional terrestrial broadcasting or satellite broadcasting as the broadcasting technology has been developed in recent years. In particular, IP (Internet Protocol) TV is a broadcasting field in which explosive growth is expected as providing multimedia services such as television, video, audio, document, graphic, and data services through an IP network with guaranteed quality, security, and reliability.

Typically, IPTV, satellite broadcasting, and cable broadcasting receive broadcasts using a set-top box (STB) installed on each user's side. Recently, an integrated set-top box has been introduced to integrate and watch various types of broadcasts rather than an independent set-top box.

In this set-top box-based TV viewing environment, a method of researching the ratings using a set-top box has been developed.

However, the commonly used viewer rating is the viewer rating per household, but as the spread of set-top boxes increases, more than one set-top box is installed in one household, so the ratings using set-top boxes do not reflect the viewer ratings per household.

In addition, when the user presses the remote control to change the channel, the channel switching information is received in the set-top box, and this channel switching information is used as the audience rating survey data. If the transmission of the channel switching information is omitted due to an error in the set-top box, the viewer rating survey There is a problem that distortion occurs.

Korean Registered Patent No. 10-0891310

The present invention was devised to solve the above problems, and an object of the present invention is to calculate a rating per household generally used in a set-top box-based TV viewing environment.

Another object of the present invention is to calculate a highly reliable viewing rate by preventing distortion of the viewing rate due to transmission loss of channel switching information occurring in a set-top box-based TV viewing environment.

To this end, the viewer rating calculation device according to the present invention is a set-top box installed in each household and the viewer rating calculation device of a video management server connected via a network, a receiver for receiving channel switching data from the set-top boxes, and the channel switching data To process the viewing history data for each set-top box and process the generated viewing history data for each set-top box to generate viewing history data for each channel, and if there is more than one set-top box attributed to a household After determining the number of all set-top boxes by calculating the number of one, it includes a viewer rating calculation unit for calculating the viewing rate of a specific time period using the number of the viewing history data and the total number of set-top boxes for each channel.

In addition, the method for calculating the ratings according to the present invention is a method for calculating the ratings of the set-top boxes installed in each household and a video management server connected through a network, receiving channel switching data from the set-top boxes and receiving the channel switching data. Generating the viewing history data for each set-top box by processing, generating the viewing history data for each channel by processing the viewing history data for each set-top box, and counting as one if there are two or more set-top boxes attributed to a household And determining the total number of set-top boxes, and calculating the viewing rate of a specific channel using the viewing history data for each channel and the total number of set-top boxes.

Here, the channel conversion data includes the set-top box ID, the previous channel (start channel), the converted channel (arrival channel), the conversion start time, the conversion completion time, the set-top box IP address, the set-top box service area information and platform operator information. Includes.

It is characterized in that the viewing history data for each set-top box consists of a viewing start time and a viewing completion time for each channel, and the viewing history data for each channel comprises a viewing start time and a viewing completion time for each set-top box.

When calculating the audience rating of the specific channel, it is characterized in that when two or more set-top boxes belonging to a household are watching during a specific time period for calculating the audience rating.

In addition, by comparing the calculated viewer ratings of the specific channel and the past viewer ratings of the specific channel, if a difference of a threshold or more occurs between the calculated viewer ratings of the specific channel and the past viewer ratings of the specific channel, check whether a date-based event exists Accordingly, when the specific event based on the date does not exist, the viewer rating of the calculated specific channel is corrected.

In addition, when the set-top boxes are subscribed to various platform operators, the first viewer rating calculated from the set-top boxes subscribed to the first platform operator and the set-top boxes subscribed to the second platform operator for the specific channel. The second viewer rating is compared, and when there is a difference of a threshold value or more between the first viewer rating and the second viewer rating, the calculated viewer rating of the specific channel is corrected.

In addition, when correcting the calculated viewer rating of a specific channel, it is characterized in that it requests a retransmission of the channel switching data in a time period in which a difference over a threshold occurs.

As described above, in the method of calculating the ratings according to the present invention, by determining the attribution furniture for each set-top box, the ratings per household generally used in a set-top box-based TV viewing environment can be calculated.

In addition, according to the present invention, through the verification procedure for the calculated viewership rate, the transmission rate of the channel switching data generated in the TV viewing environment based on the set-top box is checked and the viewing rate is corrected to prevent distortion of the viewership rate and provide a reliable viewing rate. It works.

In addition, according to the present invention, since the viewer's direct intervention (such as a survey) is not required, the viewer rating can be calculated by collecting the corresponding data without interfering with the viewer's viewing.

1 is a schematic configuration diagram of a system for calculating ratings according to the present invention.
2 is an internal configuration diagram of an audience rating calculating device according to the present invention.
3 is a diagram showing channel switching data.
4 is a view showing viewing history information for each set-top box.
5 is a view showing viewing history information for each channel.
FIG. 6 is a view showing viewing history information for each channel when two or more set-top boxes exist in the furniture.
7 is a flowchart of a process for calculating viewer ratings according to the present invention.
8 is a graph comparing viewer ratings and past viewer ratings of a specific channel.
9 is a graph comparing viewer ratings of the same channel for set-top boxes subscribed to other platform operators.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to clarify the technical spirit of the present invention. In describing the present invention, when it is determined that a detailed description of related known functions or components may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In the drawings, elements having substantially the same functional configuration are assigned the same reference numerals and symbols as possible, even though they are displayed on different drawings. For convenience of explanation, if necessary, describe the device and method together.

1 shows a schematic configuration of a system for calculating ratings according to the present invention.

Referring to FIG. 1, a system for calculating viewership according to the present invention includes a TV device 10, a set-top box 20 connected to the TV device 10, and a server 30 communicating with the set-top box 20 through a network. ).

Each furniture has a TV device 10, and the TV device 10 is installed with a set-top box 20 connected to it. The set-top box 20 is connected to the server 30 and a communication network such as the Internet to communicate with the server 30. According to an embodiment, the set-top box 20 may transmit information on which the channel of the TV device 10 has been changed to the server 30. Also, according to an embodiment, the set-top box 20 may receive content including broadcast data to be provided to the TV device 10 from the server 30.

The server 30 is a distributed processing system that stores and manages large amounts of data, and can communicate with the set-top box 20 to process various data. For example, the server 30 may manage data provided to the set-top box 20, such as advertisement data, broadcast data, etc., and in the present invention, the channel conversion data received from the set-top box 20 is received to view viewer ratings. Can be calculated. In the present specification, a device included in the server 30 to calculate the viewer rating is described as a viewer rating calculating device, and described as being included in the server 30, but a plurality of physically separated devices in the server 30 perform different functions. You may. However, hereinafter, for convenience of description, the server 30 and the viewer rating calculation device are considered to be the same.

Viewers of furniture can switch TV channels using the remote control while watching TV. The viewer of the furniture is referred to as the user in the following description.

When the user presses the channel movement button on the remote control or a specific channel number while watching TV, a channel switching signal is transmitted from the remote control to the set-top box 20.

The set-top box 20 may generate channel switching data based on the channel switching signal of the remote control and transmit the channel switching data to the viewer rating calculating device 30 through the network. In the present invention, the set-top box 20 requests the broadcast data for the channel after switching based on the channel switching signal received from the remote control through the network, and receives the broadcasting data through the network again. ), Channel switching data may be generated by including time information for transmitting the switched channel data.

According to an embodiment, the set-top box 20 may directly transmit the generated channel switching data to the viewer rating calculating device 30 or transmit the channel switching data at the request of the viewer rating calculating device 30. In addition, in another embodiment, the set-top box 20 may transmit channel switching data to the viewer rating calculating device 30 according to a preset time interval.

The viewer rating calculating device 30 collects channel conversion data from the set-top box 20 installed in each household and processes the channel conversion data to calculate the viewer rating per household in real time.

As the penetration rate of the set-top box 20 increases, there may be cases where two or more set-top boxes are installed in a single furniture. The viewer rating calculating device 30 according to the present invention confirms the IP address of the set-top box. By identifying a plurality of set-top boxes belonging to furniture, and processing one set-top box per household, it is also possible to calculate the ratings per household generally used.

2 is a block diagram of an apparatus for calculating an audience rating according to an embodiment of the present invention.

Referring to FIG. 2, the audience rating calculating device 30 includes a receiver 301, a correction unit 302, a viewing history data processing unit 303, an audience rating calculation unit 304, a memory 305, and an audience rating comparison unit 306. ), And a transmitter 307.

The receiving unit 301 receives channel switching data from the set-top box 20 through a network such as the Internet.

As shown in FIG. 3, the channel conversion data is set-top box ID, previous channel (start channel), converted channel (arrival channel), conversion start time, conversion completion time, set-top box IP address, set-top box service area. Information and platform operator information. According to an embodiment, the service area information of the set-top box and platform operator information may be included in the set-top box ID, and the channel switching data may have a different format depending on the platform provider or service area providing the set-top box.

The correction unit 302 may check the error of the channel switching data transmitted through the network and correct the channel switching data when an error occurs. For example, the correction unit 302 does not receive channel switching data even when channel switching data that does not conform to a predetermined format of the channel switching data is received or channel switching data must be received within a preset time by a request. Otherwise, the channel switching data may be corrected when the channel switching data does not fluctuate for a predetermined time or longer. The correction of the channel switching data may be performed by the correction unit 302 itself, or may be performed by requesting the channel switching data to the set-top box 20 again.

The viewing history data processing unit 303 processes the channel switching data to generate viewing history data for each set-top box, and processes the viewing history data for each set-top box to generate viewing history data for each channel.

4 shows an example of viewing history data for each set-top box.

Referring to FIG. 4, it is shown that viewing history data for each set-top box is generated using information of channel switching data. That is, when the arrival channel and the start channel are common in the time-series generated channel switching data in the same set-top box, the switching completion time of the channel switching data including the arrival channel and the switching start time of the channel switching data including the starting channel Based on this, a viewing start time and a viewing completion time for the common channel can be determined.

As described above, the viewing history data for each set-top box is composed of a viewing start time and a viewing completion time for each channel.

5 shows an embodiment of viewing history data for each channel.

Referring to FIG. 5, viewing history data for each channel may be generated by extracting viewing start time and viewing completion time for a specific channel from the viewing history data for each set-top box.

As such, the viewing history data for each channel is composed of a viewing start time and a viewing completion time for each set-top box.

5 (a) is the viewing history data of the MBC channel, and (b) is the viewing history data of the KBS channel. As shown in (a) and (b) of FIG. 5, it can be seen for which channel the set-top boxes A, B, and C watched the corresponding channel during the entire time period.

Referring to FIG. 2 again, the viewer rating calculator 304 calculates the viewer rating of a specific channel using the viewing history data for each channel and the total number of set-top boxes.

The viewer rating calculator 304 determines the total number of set-top boxes by counting as one if the number of set-top boxes belonging to one household is two or more. The viewer rating calculator 304 may identify the set top box belonging furniture by checking the IP address of the set top box included in the channel switching data. For example, if there are three set-top boxes with different IP addresses (61.78.81.23x) but different set-top box IDs in the channel switching data, the three set-top boxes are regarded as belonging to one household, and one set-top box Counts as

The viewer rating calculator 304 may check the number of set-top boxes being watched in a specific time zone from the viewing history data for each channel, and divide the number of set-top boxes being watched in the channel by the total number of set-top boxes to calculate the viewer rating in a specific time period. have. At this time, when two or more set-top boxes belonging to one household are watching at a specific time, the viewer rating is calculated by counting as one.

6 shows an embodiment of viewing history data for each channel when two or more set-top boxes exist in the furniture.

Referring to FIG. 6, it can be seen that two set-top boxes A1 and A2 exist in furniture A, one set-top box B exists in furniture B, and two set-top boxes C1 and C2 exist in furniture C. .

In this situation, the total number of set-top boxes equal to the number of households is three, which is used to calculate the viewer rating. Looking at the viewing rate at a specific time, the viewing rate of the MBC channel at 10:24 is 2/3 = 60%, and the viewing rate of the MBC channel at 10:27 is 1/3 = 33%. At 10:25 and 10:26, if both set-top boxes belonging to the C furniture are being watched, the rating is 3/3 = 100%, calculated as one.

The viewer rating calculator 304 may not only calculate the viewer rating of the entire household using the total number of set-top claps, but also the viewer rating of a specific household. That is, the viewer rating calculator 304 may calculate the viewer rating of a specific area or the household rating of a household subscribed to a specific platform operator using service area information or platform operator information included in the channel switching data.

For example, the viewer rating calculator 304 may calculate a first viewer rating from set-top boxes subscribed to the first platform operator and a second viewer rating from set-top boxes subscribed to the second platform operator for a specific channel. . In this way, the viewer rating calculator 304 can calculate the viewer rating in various ways.

The memory 305 stores various viewer ratings calculated by the viewer rating calculator 304. The memory 305 may store and store the viewer ratings of the entire household, the viewer ratings of a specific region, the household viewer ratings by platform operators, and the like.

The viewer rating comparison unit 306 compares the ratings calculated by the viewer rating calculation unit 304 with the past ratings stored in the memory 305. For example, the viewer rating comparison unit 306 may compare a viewer rating of a specific channel with a viewer rating of a week before the viewer rating of the specific channel. That is, since TV programs are organized for each day of the week and show a trend accordingly, viewer rating data of the same day of the corresponding time zone can be compared. In addition, the comparison of the ratings may compare the ratings at the same time or the past ratings of a group of similar channels including other channels showing similar trends in the ratings as well as the ratings of the corresponding channel.

As a result of comparison, if there is a difference of more than a threshold between two viewer ratings, the viewer rating comparison unit 306 determines whether the difference is due to a date-based event (festival, holiday, national disaster, etc.) and is due to a date-based event. Otherwise, it generates a request signal for viewer rating correction.

According to an embodiment, the viewer rating comparison unit 306 may determine a parameter of all channel switching data when there is a difference of more than a threshold between two viewer ratings. For example, if 10,000 channels are received at that time, despite the fact that 100,000 channels should be received, the network condition or the platform service itself may have a problem. It is also possible to generate a request signal.

In addition, as described above, the viewer rating comparison unit 306 may compare viewer ratings among set-top boxes subscribed to different platform operators. That is, the viewer rating comparison unit 306 may compare the first viewer rating calculated from the set-top boxes subscribed to the first platform operator and the second viewer rating calculated from the set-top boxes subscribed to the second platform operator for a specific channel. .

As a result of the comparison, when there is a difference of a threshold value or more between the first viewer rating and the second viewer rating, the viewer rating comparison unit 306 generates the above-described viewer rating correction request signal.

The viewer rating correction request signal is for re-requesting the channel switching data to the set-top box 20, and the channel switching data of a time period or a channel switching data of the entire time period (one day) in which a difference over a threshold occurs through the viewer rating correction request signal You can request retransmission of.

The transmitter 307 receives the viewer rating correction request signal from the viewer rating comparison unit 306 and transmits the viewer rating correction request signal to the set-top box 20 through the network.

According to an embodiment, the viewer rating comparison unit 306 may transmit a viewer rating correction request signal to the viewer rating calculation unit 304. The viewer rating calculator 304 may correct the viewer rating calculation value to show a similar viewer rating trend with respect to the viewer rating with a difference of more than a threshold. The correction of the viewer rating calculation value can be made in various ways. For example, by checking the past record, for the viewing pattern at the same time zone of the same channel per hour, when the data of one platform shows a difference over the threshold (threshold: 50%), the channel for the set-top box 20 A request for retransmission of conversion data is performed.

According to an embodiment, the set-top box 20 requesting retransmission of channel switching data may be selected in various ways.

7 is a flowchart for explaining a method of calculating viewer ratings according to an embodiment of the present invention.

The process for calculating the viewer rating is performed by the viewer rating calculating device of the image management server.

Referring to FIG. 7, first, the reception unit 301 of the viewer rating calculating device 30 receives channel switching data from the set-top box 20 (S10).

Next, the correction unit 302 checks whether there is an error in the channel switching data through an error detection correction circuit or the like and performs correction on the channel switching data when an error is detected (S12). As described above, whether there is an error in the channel switching data can be verified in various ways.

When the correction of the channel switching data is completed, the viewing history data processing unit 303 processes the channel switching data to generate viewing history data for each set-top box (S14). Subsequently, the viewing history data for each set-top box is processed to generate viewing history data for each channel (S16).

Next, the viewer rating calculating unit 304 checks the IP address of the set-top box of the channel switching data, and if there are two or more set-top boxes belonging to one household, it is calculated as one to determine the total number of set-top boxes (S18).

When the total number of set-top claps is determined, the viewing rate is calculated using the viewing history data for each channel and the total number of set-top boxes (S20). The ratings include not only the total ratings using the total number of set-top boxes, but also the specific ratings using the number of set-top boxes belonging to a specific region or platform operator.

When various viewer ratings are calculated as described above, the viewer rating comparison unit 306 first compares the viewer rating of a specific channel with the past viewer rating of the specific channel to determine whether there is a difference over a threshold between the viewer rating of a specific channel and the past viewer rating of the specific channel ( S22).

If there is no difference over the threshold, the first viewer rating calculated from the set-top boxes subscribed to the first platform operator and the second viewer rating calculated from the set-top boxes subscribed to the second platform operator are compared for the specific channel. It is checked whether there is a difference over the threshold (S24).

If there is no difference above the threshold, it is determined that there is no abnormality in the ratings calculated in step 20 and the calculated ratings are determined (S28).

However, if it is determined in step 22 that there is a difference over a threshold, it is checked once more whether a date-based event exists (S26), and if a specific date-based event exists, the process proceeds to step 24, and a specific date-based event does not exist. If not, it is determined that there is an abnormality in the viewership rate and requests retransmission of the channel switching data to the set-top box 20 (S30).

In addition, when it is determined in step 24 that there is a difference over the threshold, it is determined that there is an abnormality in the viewing rate and requests retransmission of the channel switching data to the set-top box 20 (S30).

If the channel switching data is requested to retransmit to the set top box 20 and the channel switching data is received from the set top box 20 again, the above-described steps are repeated to calculate the viewer rating again.

FIG. 8 is a graph comparing viewer ratings of a particular channel and past viewer ratings, and FIG. 9 is a graph comparing viewer ratings of the same channel for set-top boxes subscribed to other platform operators.

Referring to FIG. 8, the blue graph shows the viewer rating calculated on the day, and the red graph shows the weekly past viewer rating (for example, a week ago viewer rating).

Here, in the part indicated by reference numeral 1, there is a difference between the two viewer ratings, and when the difference is greater than or equal to a predetermined threshold, it may be determined that there is an abnormality in the calculated viewer rating on the day.

Referring to FIG. 9, the blue line represents the viewer ratings of the subscribers belonging to the first platform operator, and the red line represents the viewer ratings of subscribers belonging to the second platform operator.

In general, viewership ratings between two platform operators on the same channel tend to be similar. 9 shows a similar trend between the two viewer ratings. If the difference between the two viewer ratings in a particular section is greater than or equal to a predetermined threshold, it may be determined that there is an abnormality in the calculated viewer rating for a specific channel.

The reason viewer ratings deviate from the general trend is often due to national events or data loss.

In the present invention, if there is a large difference between viewer ratings even when there is no event based on the date through the past viewer rating comparison process, or if there is a large difference between the two viewer ratings through the viewer rating comparison process between different platforms, data loss, that is, channel switching data in a set-top box viewing environment It is considered that there is data loss during transmission. Accordingly, it is possible to increase the reliability of the viewing rate by recalculating the viewing rate through retransmission of the channel switching data.

The above-described exemplary structures according to the present invention are computer program products recorded on a recording medium readable by program instructions, software modules, microcode, and computers (all including devices having information processing functions) executed by a processor, It may be implemented in various ways, such as logic circuits, custom semiconductors, or firmware. Examples of the computer-readable recording medium include ROM, RAM, CD, DVD, magnetic tape, hard disk, floppy disk, hard disk, optical data storage device, etc., and carrier waves (eg, via the Internet) Transport). In addition, the computer-readable recording medium can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The present invention has been described in detail with reference to preferred embodiments shown in the drawings. These embodiments are not intended to limit the invention, but merely illustrative, and should be considered from an explanatory point of view rather than a limiting point of view. The true technical protection scope of the present invention should be defined by the technical spirit of the appended claims rather than the foregoing description. Although specific terms are used in this specification, they are used only for the purpose of illustrating the concept of the present invention and are not used to limit the scope of the present invention as defined in the claims or the claims. Therefore, those skilled in the art to which the present invention pertains will understand that various modifications and other equivalent embodiments are possible without departing from the essential technical idea of the present invention as claimed in the claims. It should be understood that equivalents include all currently invented equivalents as well as equivalents to be developed in the future, ie, all components invented to perform the same function regardless of structure.

Claims (9)

In the set-top boxes installed in each furniture and the server rating connected device through a network,
A receiver configured to receive channel switching data from the set-top boxes;
A viewing history data processing unit which processes the channel switching data to generate viewing history data for each set-top box and processes the generated viewing history data for each set-top box to generate viewing history data for each channel; And
When a plurality of set-top boxes belong to a household, the number of all set-top boxes is determined by calculating as one set-top box, and then the viewing rate data for each channel and the number of all set-top boxes are used to calculate the viewing rate at a specific time. A viewer rating calculation device using the channel switching data including a viewer rating calculation unit. According to claim 1,
The channel switching data using the channel switching data, characterized in that it comprises a set-top box ID, the channel before conversion (start channel), the switched channel (arrival channel), the start time of the switch, the time of completion of the switch, and the IP address of the set-top box. Viewer rating calculation device. According to claim 1,
The viewing history data for each set-top box is composed of a viewing start time and a viewing completion time for each channel. According to claim 1,
The viewing history data for each channel comprises a viewing start time and a viewing completion time for each set-top box. According to claim 1,
The viewer rating calculation unit, the viewer rating calculation device using the channel switching data, characterized in that when a plurality of set-top boxes belonging to a household at a specific time to calculate the viewer rating is calculated as one set-top box. In the method of calculating the rating of the video management server connected through the network and the set-top boxes installed in each household,
Receiving channel switching data from the set-top boxes;
Processing the channel conversion data to generate viewing history data for each set-top box;
Generating the viewing history data for each channel by processing the viewing history data for each set-top box;
If it is determined that a plurality of set-top boxes belong to one household, calculating a single set-top box to determine the total number of set-top boxes; And
And calculating a viewer rating of a specific channel using the viewing history data for each channel and the total number of set-top boxes. The method of claim 6,
The channel switching data using the channel switching data, characterized in that it comprises a set-top box ID, the channel before conversion (start channel), the switched channel (arrival channel), the start time of the switch, the time of completion of the switch, and the IP address of the set-top box. How to calculate viewership. The method of claim 6,
The viewing history data for each set-top box is composed of a viewing start time and a viewing completion time for each channel. The method of claim 6,
The viewing history data for each channel comprises a viewing start time and a viewing completion time for each set-top box.

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