JP5643059B2 - Broadcast area change method - Google Patents

Description

  The present invention relates to an area one-segment broadcasting transmitter characterized in that, in area one-segment broadcasting, transmission power is made variable in accordance with a viewer's situation.

  In recent years, local one-segment broadcasting (hereinafter referred to as area one-segment broadcasting) using weak radio waves that can be broadcast without applying for a license has become widespread. Along with this, commercial facilities that use the Area One Seg to advertise products and services are increasing. In particular, a broadcasting system for advertising advertisements for products and services using Area One Seg for mobile objects and small portable terminals is being studied.

  In the Area One Seg service, for example, it is not a wide broadcasting area such as general broadcasting, but, for example, it distributes information specialized for a narrow area such as a station yard, event facility, etc. . For example, when a concert venue is set as an area, useful information in the hall (for example, concert start time, artist information, store information) and value-added information for users of the concert venue (for example, concert information of other artists) ) Etc. can be distributed.

  In order to receive such area one seg, a memory table having location information indicating the broadcast frequency of area one seg and the broadcast range of area one seg is provided in the terminal, and viewing at the current position is performed by referring to the memory table. A technique for specifying a possible area one-segment broadcasting station and automatically setting the reception frequency of the terminal to the broadcasting frequency is disclosed (see Patent Document 1).

  In addition, a technique for simply notifying a user whether or not the current location is a location providing an area one seg service is disclosed (see Patent Document 2). This is a means for the base station to transmit broadcast service provision information and to display broadcast program introduction information included in the broadcast service provision information on the screen of the mobile station. It can be recognized that it is a place that provides Area One Seg service.

JP 2006-141034 A JP 2010-166153 A

  However, these proposals relate to a receiver for efficiently receiving area one seg, and the technology related to transmission control of the transmitter in area one seg is still under development, and the current situation is that the broadcasting radio wave is flowing down.

  In view of these facts, the present invention is problematic for users who want to watch while suppressing transmission of unnecessary waves by efficiently performing transmission control such as increasing or decreasing the transmission power of the transmitter of the Area One Seg. It provides a technology that makes it possible to view Area One Seg without any problems.

The area one seg device according to claim 1 transmits a broadcast wave to the terminal device possessed by the viewer who stays in the vicinity of the transmission antenna via the transmission antenna. Viewer distribution identification means,
The number of viewers and the distance between the viewers and the transmitting antenna are identified. The transmission power setting means has a larger value among a first transmission power given as a value proportional to the number of viewers and a second transmission power given as a value proportional to the distance. The transmission power of the broadcast wave to be transmitted via the transmission antenna is set.

  According to the present invention, it is possible to control the transmission power from the transmitter of the area one seg according to the number of viewers and the distance between the transmitter and the viewer, so that transmission of unnecessary waves can be suppressed, and The power saving of the transmitter can be realized. Furthermore, suppression of unnecessary wave transmission contributes to effective use of frequency.

It is the figure which showed the reception possibility of the 1seg terminal by increase / decrease in transmission power. It is the figure which showed the component of the transmitter and receiver of an area one segment. It is a figure showing a viewer grasping device using image analysis means. It is the figure which showed an example of the image analysis means. It is the figure which showed the viewer grasping | ascertainment apparatus using a weight sensor means. It is the figure which showed an example of the weight analysis means. It is a figure showing a viewer grasping device using a terminal application. It is the figure which showed the graph for determining radio field intensity.

  A preferred embodiment of the present invention will be described with reference to the drawings. In addition, although the present Example demonstrates the area one seg by a weak radio wave, the distance of a repeater and a receiving terminal does not limit this, Therefore It can also be extended to the digital broadcasting by the conventional strong radio wave.

  In the following description, a signal transmitted from the broadcast station to the relay station is referred to as a broadcast signal, and a radio wave transmitted from the relay station to the receiving terminal is referred to as a broadcast wave.

  The present invention makes it possible to suppress unnecessary waves and to effectively use frequency resources by making variable the radio field intensity transmitted by the transmitter of the area one-segment relay station. FIG. This indicates whether or not the mobile one-seg receiver can receive signals.

  In other words, if the field intensity is such that the viewable area corresponds to 103, the portable one-seg receivers 101a and 101b can receive the area one-seg and the field intensity such that the viewable area corresponds to 105 can be obtained. For example, if the mobile one-seg receiver 101a can receive the area one-seg and the radio wave intensity has a viewable area corresponding to 107, the portable one-seg receivers 101a, 101b, and 101c can receive the area one-seg.

  In this way, by controlling the transmission power according to the distance and number of viewers around the transmitter of Area One Seg, for example, when there is no viewer, the transmitter emits radio waves. When there is only one viewer, it is possible to reduce the intensity of radio wave emission from the transmitter, and as a result, it is possible to suppress unnecessary waves and effectively use frequency resources.

  Next, FIG. 2 shows components of a transmitter and a receiver in Area One Seg. In the program control apparatus 201, based on information transmitted from the viewer information receiving unit 207 that receives the number of viewers and the distance from the antenna, whether or not to transmit a broadcast wave, and further broadcasts such as transmission radio wave intensity The information is calculated by the area calculation unit 203, and the program control unit 205 sends the broadcast information together with the broadcast information to a relay station installed in each area.

  Here, transmission of the broadcast signal is not limited to radio wave emission by radio, but may be, for example, a wired means using the Internet or a dedicated line, a broadcast station having program content and managing a program by the program control device 201; A connection method with a relay station that relays the area one segment in each area is arbitrary.

  Next, the broadcast signal and broadcast information transmitted from the program control apparatus 201 are received by the broadcast apparatus 210 which is the relay station. The broadcasting device 210 includes a receiving unit 212 that receives a broadcast signal transmitted by wire or wireless as described above, and an output control unit 213 that controls transmission power of the transmitting antenna 220.

  The weak broadcast radio wave radiated from the transmission antenna 220 is received by the viewer receiving terminal 230, and the viewer 240 views the area one segment via the display unit of the viewer receiving terminal 230. Then, the viewer grasping device 250 is installed at a position adjacent to the antenna 220.

  The viewer grasping device 250 recognizes viewers around the antenna 220 by various means, and transmits the distance and the number of people from the antenna 220 to the viewer information receiving unit 207 of the program control device 201. Here, since the viewer grasping device 205 is a stationary device and is installed in the vicinity of the broadcasting device 210, the connecting means to the program control device 201 may be any means such as a dedicated line or an Internet line.

  Next, the operation of the viewer grasping device 250 will be described.

(Embodiment 1 of viewer grasping device)
FIG. 3 shows an embodiment of a viewer grasping device using a camera. A shooting camera 303 and an image processing device 305 for analyzing shooting data from the shooting camera 303 are installed in the vicinity of the broadcast wave transmission antenna 301. There are five persons around, the person 310a, the person 310b, and the person 310c are moving, and the person 320a and the person 320b are stopped. The photographing camera includes a special purpose such as an infrared camera.

  The shooting camera 303 shoots the entire periphery of the antenna 301. By taking a plurality of shots at different times and taking a difference between the shot images, if there is only one shooting lens, the foot is stopped around it. If there are a plurality of photographic lenses, the image can be geometrically captured as a three-dimensional image. Therefore, in addition to the number of people who have stopped their feet in the surroundings, Can also be measured by the image processing apparatus 305.

  In this case, if the shooting camera 303 is installed in the vicinity of the antenna 301, that is, if the shooting camera 303 is installed in the vicinity of the antenna 301, a stationary person is regarded as an area one-segment viewer and moved. A person is just passing by.

  FIG. 4 is a diagram showing a method for discriminating between viewers and non-viewers using the camera for photographing 303. According to 405 obtained by calculating the difference between the captured image 401 at time t and the captured image 403 at time t + α, 320a where the image disappeared is a person who has stopped his foot. It can be seen that the image 310a is a moving person.

  In the present invention, since a person who has stopped his feet is regarded as a viewer, it can be seen that there are two viewers around the antenna 301 in FIG. Note that what is called the difference so far is the absolute value of the difference, and an image is displayed even if the calculation result is negative.

  The viewer grasping device 250 aggregates the information obtained from the image processing device 305, and transmits the number of people who have stopped around the antenna and the distance from the antenna to the viewer information receiving unit 207 of the program control device 201. .

(Embodiment 2 of viewer grasping device)
FIG. 5 shows an embodiment of a viewer grasping device using a weight sensor. A weight sensor 503 and a weight sensor information processing apparatus 501 for analyzing weight increase / decrease data by the weight sensor 503 are installed in the vicinity of the broadcast wave transmitting antenna 301. There are four persons around, the persons 510a and 510b are standing on the weight sensor, and the persons 520a and 520b are not standing on the weight sensor.

  FIG. 6 is a diagram illustrating processing of the weight sensor information processing apparatus 501. The vertical axis is the weight obtained by the weight sensor, and the horizontal axis is the elapsed time. As shown in the figure, one person is detected from time a to time b, one person from time c to time d, two persons from time d to time e, and one person from time e to time f. It can be determined that no person is on the weight sensor 503 at other times.

  In the present embodiment, when the radial direction from the antenna 301 is divided into a plurality of areas according to the distance and a weight sensor is installed in each area, the number of persons acquired by the weight sensor information processing device is The distance information from 301 is included.

  The viewer grasping device 250 aggregates the information obtained from the weight sensor information device 501, and transmits the number of people who are stopping around the antenna and the distance from the antenna to the viewer information receiving unit 207 of the program control device 201. To do.

(Embodiment 3 of viewer grasping device)
FIG. 7 shows an embodiment of a viewer grasping device using a terminal application. A receiving terminal possessed by a user who wants to watch Area One Seg includes a GPS 701 and an application 703, and the application 703 transmits the desired viewing information and the position information acquired by the GPS 701 to the viewer grasping device 250 via the transmission control unit 705. To do.

  The application 703 includes a type that is installed and used on a mobile terminal and a type that is used from a WEB using a browser. Any type of information is transmitted to the viewer grasping device 250 by wireless signals. Works to send. The wireless signal has various means such as Bluetooth and infrared, and the present invention is not limited to this.

  The viewer grasping device 250 aggregates the viewing request information transmitted from the mobile terminal and the position information by the GPS 701, and the viewer information receiving unit in which the program control device 201 has the number of users who desire viewing and the distance from the antenna. To 207.

  As described above, three examples have been shown as an example of the operation of the viewer grasping device 250.

  In the program control device 201, the viewer information receiving unit 207 receives the number of persons around the antenna and the distance from the antenna 220 from the viewer grasping device 250, and the area calculating unit 203 desires to watch in each area. It is determined whether or not an area one-segment broadcasting is necessary based on the presence or absence of a person who is presumed to be.

  Further, it is determined that the transmission power from the antenna 220 is increased in proportion to the number of persons estimated to be viewing or in proportion to the distance from the antenna 220.

  Based on such determination by the area calculation unit 203, the broadcast signal and the power to be transmitted by the antenna 220 are transmitted together from the program control unit 205 to the broadcasting device 210 as described above using an arbitrary wired or wireless signal.

  Next, an example of means for determining the strength of the transmission power from the antenna 220 will be described with reference to FIG.

  FIG. 8A is a diagram showing the relationship between the number of people around the antenna 220 and the radio wave intensity of the radio wave to be transmitted. From this graph, it is assumed that the radio field intensity in a certain area is x.

  FIG. 8B is a relationship diagram between the longest distance from the antenna 220 and the radio wave intensity of the transmitted radio wave among a plurality of persons around the antenna. From this graph, it is assumed that the radio field intensity in a certain area is y.

  In order to respond to the request of a person who desires to watch, according to the present invention, as an example, a means of adopting the stronger radio wave intensity of x and y is taken. However, in the embodiment of the operation of the three types of viewer grasping devices 250, when the means for acquiring only the number of people without using the distance between the viewer and the antenna 220 is used, only FIG. Determine radio field strength.

  In general, when there are a plurality of viewers, there is a certain interval between the viewers. Therefore, it can be easily estimated that the distance from the antenna 220 increases as the number of viewers increases. Thus, even if it is a means for acquiring only the number of persons, there is no big error in the determined radio wave intensity.

  As described above, the present invention installs a device for grasping the viewer's position around the transmitting antenna, determines the transmitted radio wave intensity based on the viewer information obtained by the device, and broadcasts the area one segment. This prevents unnecessary transmission of radio waves and contributes to effective use of frequencies.

  As described above, the present embodiment has been described with respect to area one seg using weak radio waves, but the distance between the repeater and the receiving terminal is not limited to this, and therefore, means extended to conventional digital broadcasting using strong radio waves may also be used. It shall be included in the present invention.

101a, 101b, 101c ... portable one-segment receiver,
103, 105, 107 ... viewable area,
201 ... Program control device, 203 ... Area calculation unit, 205 ... Program control unit,
207 ... viewer information receiving unit, 210 ... broadcasting device, 212 ... receiving unit,
213 ... Output control unit, 220 ... Antenna, 230 ... Viewer receiving terminal,
240 ... viewer, 250 ... viewer grasping device, 301 ... transmitting antenna,
303 ... Camera, 305 ... Image processing device,
310a, 310b, 310c ... a moving person,
320a, 320b ... the person who has stopped,
401 ... a captured image at time t, 403 ... a captured image at time t + α,
403 ... Difference between captured images, 501 ... Weight sensor information processing device,
503 ... Weight sensor,
510a, 510b ... person on weight sensor,
520a, 520b ... a person not on the weight sensor,
701 ... GPS, 703 ... Application,
705: Transmission control unit.

Claims (1)

An area one seg device that transmits a broadcast wave to the terminal device of a viewer who stays in the vicinity of the transmission antenna via the transmission antenna ,
Viewer distribution identifying means for identifying the number of viewers and the distance between the viewers and the transmitting antenna;
Of the first transmission power given as a value proportional to the number of viewers and the second transmission power given as a value proportional to the distance, the larger value is transmitted via the transmission antenna. Transmission power setting means for setting transmission power of the broadcast wave to be performed;
Area seg apparatus characterized by comprising a.