JP2011035479A - Portable television set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable television set for reducing the time and labor of a user that is required for reproducing television broadcast. <P>SOLUTION: The portable television set includes a terrestrial digital broadcasting reception antenna for receiving a signal of television broadcast; a signal strength acquiring section for acquiring strength of a signal received by the terrestrial digital broadcasting antenna; a reception-time state acquiring section for acquiring at least a position of the terrestrial digital broadcasting reception antenna, when the strength of a signal is higher than a prescribed audible value; a storage section for storing strength information regarding the intensity of the signal acquired by the signal strength acquiring section and position information regarding the position of the terrestrial digital broadcasting reception antenna acquired by the reception time state acquiring section in association with each other; a guiding section for providing information for guiding the terrestrial digital broadcasting reception antenna so that the terrestrial digital broadcasting reception antenna is located in a position indicated by the position information stored by the storage section. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a portable television device for reproducing video and audio of television broadcasting.

  In recent years, mobile phones, notebook personal computers, portable game machines, portable television dedicated devices, and the like include devices capable of reproducing television broadcast video and audio. Hereinafter, reproducing video and audio of television broadcasting is simply referred to as reproducing television broadcasting. Such a portable television device mainly reproduces digital terrestrial television broadcasting called “one-segment partial reception service (commonly known as one-segment) for mobile phones / mobile terminals”. For example, Patent Document 1 describes a reception status display device that displays a digital terrestrial television broadcast reception status as a numerical value, and allows a user to visually understand how the reception status value changes over time. Has been.

JP 2007-288515 A

  Unlike a stationary television device, a portable television device can be taken out by a user. For this reason, the portable television device does not always receive radio waves of television broadcasting at a fixed position or a fixed posture. In addition, the intensity of radio waves of television broadcasting varies depending on the position and attitude of reception. Therefore, depending on the position where the radio wave of the television broadcast is received, the intensity of the received radio wave may be less than the required intensity. For this reason, when the intensity of the received radio wave is less than the required intensity, the user needs to search for a position or posture in which the intensity of the radio wave is greater than the required intensity. Therefore, the conventional portable television device may increase the user's effort required to reproduce the television broadcast.

  The present invention has been made in view of the above, and an object of the present invention is to provide a portable television device that can reduce the user's effort required to reproduce a television broadcast.

  In order to solve the above-described problems and achieve the object, a portable television device according to the present invention includes a receiver that receives a television broadcast signal and a signal that acquires the intensity of the signal received by the receiver. An intensity acquisition unit, a reception state acquisition unit that acquires at least a position of the reception unit when the intensity of the signal is greater than a predetermined viewable value, and an intensity of the signal acquired by the signal intensity acquisition unit; A storage unit that associates and stores intensity information and position information related to the position of the reception unit acquired by the reception-time state acquisition unit, and the position of the reception unit is stored in the storage unit when receiving the signal. A guidance unit that provides information for guiding the reception unit to be in a position indicated by the stored location information.

  As a preferred aspect of the present invention, the reception state acquisition unit further acquires an attitude of the reception unit when the intensity of the signal is larger than the viewable value, and the storage unit stores the intensity information. In addition to the position information, the position information related to the posture of the receiving unit acquired by the reception-time state acquisition unit is stored in association with each other, and the guidance unit further includes the posture of the receiving unit. It is desirable to provide information for guiding the reception unit so that the posture indicated by the posture information stored in the storage unit is obtained.

  As a preferred aspect of the present invention, it is desirable that the posture information includes direction information related to an orientation of the receiving unit on a horizontal plane.

  As a preferred aspect of the present invention, it is desirable that the posture information includes inclination information related to an inclination of the receiving unit with respect to a vertical direction.

  As a preferred aspect of the present invention, it is desirable that the guiding unit provides information for guiding the receiving unit when a current intensity of the signal is equal to or less than the viewable value.

  As a preferred aspect of the present invention, it is desirable that the position information includes horizontal position information related to a position of the receiving unit on a horizontal plane.

  As a preferred aspect of the present invention, it is desirable that the position information includes altitude information related to a height of the receiving unit in a vertical direction.

  As a preferable aspect of the present invention, it is preferable that the display unit displays an image, and the guide unit displays the image on the display unit as a guide image as information for guiding the reception unit.

  As a preferred aspect of the present invention, the image processing apparatus includes an imaging unit, and the reception state acquisition unit acquires an image from the imaging unit when the intensity of the signal is larger than the viewable value, and the storage unit The intensity information and the image captured by the imaging unit are stored in association with each other, and the guidance unit captures the image captured by the imaging unit on the display unit as information for guiding the reception unit. It is desirable to display it as an image.

  As a preferred aspect of the present invention, it is desirable that the display unit simultaneously displays a television broadcast video and the guide image.

  As a preferable aspect of the present invention, the guide unit causes the display unit to display, as the guide image, an image showing the position of the receiving unit on the horizontal plane and the vertical position of the receiving unit in three dimensions. Is desirable.

  As a preferred aspect of the present invention, when the difference between the current position of the receiving unit and the position indicated by the position information stored in the storage unit is less than a predetermined mode switching value, Provide different types of information as information for guiding the receiving unit when the difference between the current position of the receiving unit and the position indicated by the position information stored in the storage unit is greater than or equal to the mode switching value It is desirable to do.

  The portable television device according to the present invention has an effect that it is possible to reduce the user's effort required to reproduce the television broadcast.

FIG. 1 is a front view showing the display unit side of the mobile phone. FIG. 2 is a front view showing the back side of the mobile phone. FIG. 3 is a block diagram showing the configuration of the control device of the mobile phone. FIG. 4 is a flowchart showing a learning procedure executed by the control device. FIG. 5 is a chart showing the relationship between the CN ratio and the position and orientation of the terrestrial digital broadcast receiving antenna. FIG. 6 is a flowchart showing a guidance procedure executed by the control device. FIG. 7 is an explanatory diagram showing a first guide image as guide information displayed on the image display panel. FIG. 8 is an explanatory diagram showing a second guide image as guide information displayed on the image display panel.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following description. In addition, constituent elements in the following description include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Hereinafter, a cellular phone will be described as the portable television device, but the application target of the present invention is not limited to the cellular phone. For example, the present invention can be applied to a PHS (Personal Handy phone System), a PDA (Personal Digital Assistant), a notebook personal computer, a portable game machine, a portable navigation device, and the like. In the following embodiments, the present invention will be described as receiving a one-segment partial reception service for mobile phones and mobile terminals, so-called one-segment broadcasting, as a television broadcast. For example, terrestrial digital broadcasting of 12 segments, analog broadcasting, and digital radio broadcasting may be used.

(Embodiment)
FIG. 1 is a front view showing the display unit side of the mobile phone. FIG. 2 is a front view showing the back side of the mobile phone. The mobile phone 1 is a mobile phone having a wireless communication function. As shown in FIGS. 1 and 2, the mobile phone 1 is provided with each device in a housing 10. The housing 10 includes, for example, a first housing 10a and a second housing 10b. The first housing 10a is connected by a hinge mechanism 11 so as to be rotatable with respect to the second housing 10b. The mobile phone 1 is a so-called foldable mobile phone. Here, the mobile phone 1 may be connected so that the first casing 10a can slide with respect to the second casing 10b, or may be configured by a single casing.

  FIG. 3 is a block diagram showing the configuration of the control device of the mobile phone. As shown in FIG. 1, the mobile phone 1 includes a control device 12 in a housing 10. As shown in FIG. 3, the mobile phone 1 is disposed in the housing 10 and electrically connected to the control device 12, as shown in FIG. 3, an image display panel 14, an operation unit 16, and a microphone 18. A receiver 20, a speaker 22, a camera 24 as an imaging means, a GPS (Global Positioning System) antenna 26, a terrestrial digital broadcast receiving antenna 28 as a receiving unit, a communication antenna 29, and a geomagnetic sensor 30. And an acceleration sensor 32 and an atmospheric pressure sensor 34.

  The image display panel 14 is, for example, a liquid crystal panel. The image display panel 14 displays images such as telephone numbers, mail contents, and standby screens. For example, the image display panel 14 is provided exposed to the first housing 10a as shown in FIG. As shown in FIG. 1, the operation unit 16 is disposed with the button portion exposed to the second housing 10 b. The operation unit 16 is operated by the user of the mobile phone 1. The control device 12 acquires information input by the user via the operation unit 16.

  The microphone 18 converts sound into an electrical signal. The control device 12 acquires the sound converted into the electric signal from the microphone 18. The microphone 18 is provided, for example, inside the second housing 10b shown in FIG. The receiver 20 converts an electrical signal into sound. The control device 12 outputs sound from the receiver 20. The receiver 20 is provided, for example, inside the first housing 10a shown in FIG. The speaker 22 converts an electrical signal into sound. The control device 12 outputs sound from the speaker 22. The speaker 22 is provided, for example, inside the second housing 10b shown in FIG. The camera 24 is an imaging device. The control device 12 controls the operation of the camera 24 and acquires an image captured by the camera 24. The camera 24 is provided, for example, in the first housing 10a shown in FIG.

  The GPS antenna 26 is a device for detecting the current position of the terrestrial digital broadcast receiving antenna 28 on the earth, which is one of the positions of the terrestrial digital broadcast receiving antenna 28. The control device 12 acquires signals received by the GPS antenna 26 from a plurality of satellites among a number of GPS satellites. The control device 12 calculates (acquires) the current horizontal position of the GPS antenna 26 based on the signal. The GPS antenna 26 and the terrestrial digital broadcast receiving antenna 28 are respectively fixed to, for example, the second casing 10b shown in FIG. For this reason, the relative positions of the GPS antenna 26 and the terrestrial digital broadcast receiving antenna 28 do not change. The control device 12 calculates (acquires) the current horizontal position of the terrestrial digital broadcast receiving antenna 28 on the earth by calculating the current position of the GPS antenna 26.

  The terrestrial digital broadcast receiving antenna 28 is an antenna for receiving a television broadcast signal. The control device 12 acquires a television broadcast signal received by the digital terrestrial broadcast receiving antenna 28. The communication antenna 29 is an antenna for realizing communication between the mobile phone 1 and another mobile phone. The communication antenna 29 is also an antenna for connecting the mobile phone 1 and a communication line.

  The geomagnetic sensor 30 is a device for detecting the orientation of the terrestrial digital broadcast receiving antenna 28, which is one of the attitudes of the terrestrial digital broadcast receiving antenna 28. Specifically, the geomagnetic sensor 30 detects the angle on the horizontal plane of itself (the geomagnetic sensor 30) with respect to the direction of geomagnetism. In the present embodiment, an angle on a horizontal plane with respect to the direction of geomagnetism is simply referred to as a direction. Based on the signal acquired from the geomagnetic sensor 30, the control device 12 calculates the angle on the horizontal plane of itself (the geomagnetic sensor 30) with respect to the direction of geomagnetism. Here, the terrestrial digital broadcast receiving antenna 28 and the geomagnetic sensor 30 are respectively fixed to, for example, the second housing 10b shown in FIG. For this reason, the relative position of the reception antenna 28 for digital terrestrial broadcasting and the geomagnetic sensor 30 does not change. The control device 12 calculates (acquires) the direction of the reception antenna 28 for digital terrestrial broadcasting by calculating the direction of the geomagnetic sensor 30.

  The acceleration sensor 32 is a device for detecting the tilt of the terrestrial digital broadcast receiving antenna 28, which is one of the attitudes of the terrestrial digital broadcast receiving antenna 28. Specifically, the acceleration sensor 32 detects the gravitational acceleration of the earth and detects the angle of itself (acceleration sensor 32) with respect to the vertical direction. In the present embodiment, the angle with respect to the vertical direction is simply referred to as inclination. The control device 12 calculates the angle of itself (acceleration sensor 32) with respect to the vertical direction based on the signal acquired from the acceleration sensor 32. Here, the terrestrial digital broadcast receiving antenna 28 and the acceleration sensor 32 are fixed to, for example, the second casing 10b shown in FIG. For this reason, the relative position between the reception antenna 28 for digital terrestrial broadcasting and the acceleration sensor 32 does not change. The control device 12 calculates (obtains) the inclination of the reception antenna 28 for digital terrestrial broadcasting by calculating the inclination of the acceleration sensor 32.

  The atmospheric pressure sensor 34 is a device for detecting the altitude in the vertical direction of the terrestrial digital broadcast receiving antenna 28 which is one of the positions of the terrestrial digital broadcast receiving antenna 28. Specifically, the atmospheric pressure sensor 34 detects the current atmospheric pressure. The control device 12 calculates the altitude of the digital terrestrial broadcast receiving antenna 28 based on the atmospheric pressure data acquired from the atmospheric pressure sensor 34. Here, the atmospheric pressure changes depending on the weather. Therefore, the atmospheric pressure is not always constant. Therefore, for example, the control device 12 first acquires the position of the terrestrial digital broadcast receiving antenna 28 detected by the GPS antenna 26, that is, the current atmospheric pressure near the current location from the communication line. And the control apparatus 12 correct | amends an actual atmospheric pressure based on the atmospheric | air pressure acquired from the communication line, and calculates the present altitude of the position where the atmospheric | air pressure sensor 34 exists. Note that the atmospheric pressure sensor 34 has a precision capable of detecting a vertical position that is more detailed than GPS. For example, the atmospheric pressure sensor 34 only needs to have a minimum accuracy with which it is possible to determine on which floor the mobile phone 1 is located in a building. The terrestrial digital broadcast receiving antenna 28 and the atmospheric pressure sensor 34 are fixed to, for example, the second casing 10b shown in FIG. Accordingly, the relative positions of the terrestrial digital broadcast receiving antenna 28 and the atmospheric pressure sensor 34 do not change. The control device 12 calculates (acquires) the height at which the digital terrestrial broadcast receiving antenna 28 is located by calculating the height of the atmospheric pressure sensor 34.

  Next, the configuration of the control device 12 will be described. Here, each unit described below is configured to be integrated into one device in the present embodiment, but for example, the control device 12 includes each unit described below configured as a separate device, respectively. These apparatuses may be electrically connected to each other. As shown in FIG. 3, the control device 12 includes a sound processing unit 12a, a communication unit 12b, a display control unit 12c, a guidance unit 12d, a broadcast signal receiving unit 12e, and a signal strength calculation as a signal strength acquisition unit. Unit 12f, reception state calculation unit 12g as a reception state acquisition unit, main processing unit 12h, storage unit 12i, and I / O interface 12j.

  The audio processing unit 12a is electrically connected to the microphone 18, the receiver 20, and the speaker 22 via the I / O interface 12j. The sound processing unit 12 a acquires sound from the microphone 18 as an electric signal, transmits an electric signal to be output to the receiver 20, and transmits an electric signal to be output to the speaker 22. The communication unit 12b is electrically connected to the communication antenna 29 via the I / O interface 12j. The communication unit 12b communicates with other mobile phones. The communication unit 12b also performs connection to a communication line, for example. The display control unit 12c is electrically connected to the image display panel 14 via the I / O interface 12j and controls the operation of the image display panel 14. The display control unit 12c also generates an image to be displayed on the image display panel 14.

  The guiding unit 12d exchanges information with the display control unit 12c. The guiding unit 12d causes the speaker 22 to output guidance voice as guidance information described later. In addition, the guiding unit 12d causes the display control unit 12c to generate a guide image as guide information described later, and causes the image display panel 14 to display the guide image via the display control unit 12c. The broadcast signal receiving unit 12e is electrically connected to the terrestrial digital broadcast receiving antenna 28 via the I / O interface 12j. The broadcast signal receiving unit 12e acquires a television broadcast signal from the terrestrial digital broadcast receiving antenna 28.

  The signal strength calculation unit 12f is configured to be able to acquire information from the broadcast signal reception unit 12e. The signal strength calculating unit 12f derives the strength of the television broadcast signal acquired by the broadcast signal receiving unit 12e. Specifically, the signal strength calculation unit 12f calculates a CN ratio (Carrier to Noise ratio). The CN ratio is a ratio between a carrier wave and noise, and a larger value indicates a better signal reception state. In terrestrial digital broadcasting, if the CN ratio is larger than a predetermined viewable value, the mobile phone 1 can provide the user with a television broadcast that can withstand viewing. The viewable value is called a required CN or a required CN ratio. In addition, the mobile phone 1 can provide the user with more stable television broadcasting that can withstand viewing as the CN ratio is larger than the viewable value and the difference between the CN ratio and the viewable value is larger.

  The reception state calculation unit 12g is electrically connected to the camera 24, the GPS antenna 26, the geomagnetic sensor 30, the acceleration sensor 32, and the atmospheric pressure sensor 34 via the I / O interface 12j. The reception state calculation unit 12g calculates (acquires) the current horizontal position of the reception antenna 28 for digital terrestrial broadcasting based on the signal acquired from the GPS antenna 26. In addition, the reception state calculation unit 12g acquires a guide captured image captured by the camera 24 as information indicating the current position and orientation of the digital terrestrial broadcasting reception antenna 28 from the camera 24. In addition, the reception-time state calculation unit 12g uses the information acquired from the geomagnetic sensor 30 as information indicating the current attitude of the terrestrial digital broadcast reception antenna 28 to determine the direction of the terrestrial digital broadcast reception antenna 28 relative to the direction of geomagnetism. Is calculated (acquired).

  In addition, the reception state calculation unit 12g calculates (acquires) the inclination of the terrestrial digital broadcast reception antenna 28 based on the signal acquired from the acceleration sensor 32 as information indicating the current attitude of the terrestrial digital broadcast reception antenna 28. ) Further, the reception-time state calculating unit 12g obtains the altitude of the position where the terrestrial digital broadcast receiving antenna 28 is located based on a signal acquired from the atmospheric pressure sensor 34 as information indicating the current attitude of the terrestrial digital broadcast receiving antenna 28. Calculate (acquire).

  The main processing unit 12h controls each unit from the voice processing unit 12a to the reception state calculation unit 12g. The main processing unit 12h is electrically connected to the storage unit 12i, acquires information stored in the storage unit 12i from the storage unit 12i, and stores information in the storage unit 12i. The main processing unit 12h is electrically connected to the operation unit 16 via the I / O interface 12j, and acquires a command input to the operation unit 16 by the user from the operation unit 16. The main processing unit 12h is interposed between the storage unit 12i and each unit of the reception state calculation unit 12g from the voice processing unit 12a, and is connected to each unit of the reception state calculation unit 12g from the storage unit 12i and the voice processing unit 12a. Also exchanges information.

  The storage unit 12i stores, for example, an operating system program, an application program, and other programs necessary for controlling each unit. Further, the storage unit 12i stores the strength information related to the signal strength calculated by the broadcast signal receiving unit 12e and the positional information related to the position of the terrestrial digital broadcast receiving antenna 28 calculated by the reception state calculating unit 12g in association with each other. To do. Further, the storage unit 12i stores the strength information and the posture information related to the posture of the reception antenna for digital terrestrial broadcasting 28 calculated by the reception state calculation unit 12g in association with each other. In addition, the storage unit 12i stores audio and images used when the guidance unit 12d performs notification to the user.

  Next, a series of procedures executed by the control device 12 in order to reduce the user's effort required when viewing the television broadcast will be described. Here, the control device 12 executes a series of two sets of procedures. One of the two sets is called a learning procedure, and the other is called a guidance procedure. First, the learning procedure will be described.

  FIG. 4 is a flowchart showing a learning procedure executed by the control device. In step ST101, the signal strength calculation unit 12f illustrated in FIG. 3 calculates the CN ratio. Next, in step ST102, the main processing unit 12h determines whether or not the mobile phone 1 can stably reproduce the television broadcast. Specifically, the main processing unit 12h first measures the time T when the CN ratio has continuously exceeded the viewable value by the time that has elapsed since the start of the reproduction of the television broadcast. Then, the main processing unit 12h determines that the mobile phone 1 can stably reproduce the television broadcast when the time T is equal to or longer than the predetermined time Ts.

  Here, the viewable value is not limited to the mobile phone 1 of the present embodiment, and is a generally used value. Specifically, the viewable value is 10 dB in the case of one segment. It should be noted that the viewable value varies depending on the one-segment and full-segment, or varies depending on the tuner. Further, the predetermined time Ts is a value that allows the mobile phone 1 to determine that the television broadcast can be stably reproduced when the time T is equal to or longer than the predetermined time Ts, and is, for example, 10 seconds. Note that, under the condition that the time T is equal to or longer than the predetermined time Ts, the larger the predetermined time Ts, the more stably the mobile phone 1 can reproduce the television broadcast.

  When the mobile phone 1 cannot stably reproduce the television broadcast (No in Step ST102), the control device 12 returns to Step ST101 and re-executes each procedure after Step ST101. When the mobile phone 1 can stably reproduce the television broadcast (Yes in step ST102), in step ST103, the reception state calculation unit 12g determines the position of the reception antenna 28 for terrestrial digital broadcast and the reception for terrestrial digital broadcast. The attitude of the antenna 28 is calculated (acquired). For example, the reception state calculation unit 12g calculates (acquires) the horizontal position of the terrestrial digital broadcast reception antenna 28 based on the signal acquired from the GPS antenna 26. Further, the reception state calculation unit 12g calculates (acquires) the altitude of the reception antenna 28 for digital terrestrial broadcasting based on the signal acquired from the atmospheric pressure sensor 34. Further, the reception state calculation unit 12g calculates (acquires) the direction of the reception antenna 28 for digital terrestrial broadcasting based on the signal acquired from the geomagnetic sensor 30. Further, the reception state calculation unit 12g calculates (acquires) the inclination of the terrestrial digital broadcast receiving antenna 28 based on the signal acquired from the acceleration sensor 32. In addition, the reception-time state calculation unit 12 g acquires a captured image for guidance captured from the camera 24 at the current position and orientation of the mobile phone 1.

  FIG. 5 is a chart showing the relationship between the CN ratio and the position and orientation of the terrestrial digital broadcast receiving antenna. In step ST104, the main processing unit 12h stores the values calculated in step ST103 in the storage unit 12i in association with the CN ratio calculated in step ST101. Specifically, as shown in FIG. 5, the main processing unit 12h, the current CN ratio as the intensity information, the horizontal position information regarding the current horizontal position of the terrestrial digital broadcast receiving antenna 28 as the position information, and the attitude information Direction information regarding the current orientation of the terrestrial digital broadcast receiving antenna 28, inclination information regarding the current inclination of the terrestrial digital broadcast receiving antenna 28 as attitude information, and altitude regarding the altitude of the terrestrial digital broadcast receiving antenna 28 as position information. The storage unit 12i stores information and a captured image for guidance captured by the camera 24 as information indicating the position and orientation. Also, the main processing unit 12h stores the reproduction time of the television broadcast in the storage unit 12i in association with the current CN ratio as an index of how stable the television broadcast can be provided to the user.

  Next, the control apparatus 12 performs step ST105 and step ST106 shown in FIG. Here, step ST105 is a step for determining whether or not to end the execution of the learning procedure. Step ST106 is a step for determining whether or not to repeat the learning procedure. In step ST105, the main processing unit 12h determines whether the television broadcast is being reproduced. In the control device 12, when the television broadcast is being reproduced, the broadcast signal receiving unit 12 e acquires the television broadcast signal from the digital terrestrial broadcast receiving antenna 28, and the display control unit 12 c transmits the television broadcast to the image display panel 14. The sound processing unit 12a outputs the sound of the television broadcast from the speaker 22. The main processing unit 12h determines whether or not the television broadcast is being reproduced based on whether or not these processes are being performed.

  When the television broadcast has not been reproduced (No in step ST105), the control device 12 ends the learning procedure. When the television broadcast is being reproduced (step ST105, Yes), in step ST106, the main processing unit 12h determines whether or not the position or orientation of the reception antenna for terrestrial digital broadcasting 28 has changed. Specifically, the main processing unit 12h determines the current horizontal position of the terrestrial digital broadcast reception antenna 28, the current orientation of the terrestrial digital broadcast reception antenna 28, and the current inclination of the terrestrial digital broadcast reception antenna 28. Then, the altitude of the reception antenna for digital terrestrial broadcasting 28 and the current guidance image captured by the camera 24 as the position information and the attitude information are updated. Then, the main processing unit 12h determines that the position or orientation of the terrestrial digital broadcast receiving antenna 28 has changed when at least one has changed from the previous value or the captured image for guidance.

  When the position or orientation of the reception antenna 28 for digital terrestrial broadcasting has changed (step ST106, Yes), the control device 12 returns to step ST101 and executes the steps after step ST101 again. When the position or attitude of the terrestrial digital broadcast receiving antenna 28 has not changed (No in step ST106), the control device 12 returns to step ST105. That is, the control device 12 repeatedly executes step ST101 to step ST104 each time the position or posture of the terrestrial digital broadcast receiving antenna 28 changes until the reproduction of the television broadcast is completed. As a result, the main processing unit 12h learns information that associates the positional information of the terrestrial digital broadcast receiving antenna 28, the attitude information of the terrestrial digital broadcast receiving antenna 28, and the CN ratio, as shown in FIG. Data can be stored in the storage unit 12i. Next, the guidance procedure will be described.

  FIG. 6 is a flowchart showing a guidance procedure executed by the control device. In step ST201, the signal strength calculation unit 12f illustrated in FIG. 3 calculates the CN ratio. Next, in step ST202, the main processing unit 12h determines whether or not the current CN ratio is larger than the viewable value. When the current CN ratio is larger than the viewable value (step ST202, Yes), the control device 12 ends the guidance procedure. If the current CN ratio is less than or equal to the viewable value (step ST202, No), in step ST203, the reception-time state calculating unit 12g determines the state of the terrestrial digital broadcast receiving antenna 28 based on the signal acquired from the GPS antenna 26. Calculate (acquire) the horizontal position.

  Next, in step ST204, the main processing unit 12h includes the current position of the terrestrial digital broadcast reception antenna 28 in the horizontal position information of the terrestrial digital broadcast reception antenna 28 stored in the storage unit 12i. It is determined whether there is corresponding horizontal position information in the vicinity of the horizontal position. The vicinity here means that the position of the terrestrial digital broadcast receiving antenna 28 when the horizontal position stored in the storage unit 12i is calculated and the current position of the terrestrial digital broadcast receiving antenna 28 are the same, for example. The range that can be determined to be within the building. In this embodiment, for example, the main processing unit 12h includes the current position of the terrestrial digital broadcast reception antenna 28 in the horizontal position information of the terrestrial digital broadcast reception antenna 28 stored in the storage unit 12i. It is determined whether there is corresponding horizontal position information within a radius of 5 m from the horizontal position.

  Here, the main processing unit 12h corresponds to the vicinity of the current altitude of the terrestrial digital broadcast receiving antenna 28 in the altitude information of the terrestrial digital broadcast receiving antenna 28 stored in the storage unit 12i. It is preferable to determine whether there is altitude information to be used. The vicinity here means that the altitude of the terrestrial digital broadcast receiving antenna 28 when the altitude information stored in the storage unit 12i is calculated is the same as the current altitude of the terrestrial digital broadcast receiving antenna 28, for example. The range that can be determined to be a floor. In the present embodiment, for example, the main processing unit 12h includes the current altitude of the terrestrial digital broadcast receiving antenna 28 in the altitude information of the terrestrial digital broadcast receiving antenna 28 stored in the storage unit 12i. It is determined whether or not there is altitude information within a radius of 1 m. As a result, the control device 12 can derive position information closer to the current position of the terrestrial digital broadcast receiving antenna 28 from the storage unit 12i.

  When there is no horizontal position information corresponding to the vicinity of the current horizontal position of the terrestrial digital broadcast receiving antenna 28 in the horizontal position information of the terrestrial digital broadcast receiving antenna 28 stored in the storage unit 12i. (Step ST204, No), the control apparatus 12 performs the learning procedure shown in FIG. Thereby, the control apparatus 12 can memorize | store the position and attitude | position of the receiving antenna 28 for digital terrestrial broadcasting which can reproduce | regenerate television broadcasting stably in a new horizontal position in the memory | storage part 12i. When the horizontal position information of the terrestrial digital broadcast receiving antenna 28 stored in the storage unit 12i includes horizontal position information corresponding to the vicinity of the current horizontal position of the terrestrial digital broadcast receiving antenna 28. (Step ST204, Yes) In step ST205, the guiding unit 12d determines that the current position and posture of the terrestrial digital broadcast reception antenna 28 are such that the position of the terrestrial digital broadcast reception antenna 28 and the terrestrial digital broadcast reception antenna 28 can be stably reproduced. Provide guidance information to the user so that they are in a posture. Next, an example of guidance information provided to the user will be described.

  FIG. 7 is an explanatory diagram showing a first guide image as guide information displayed on the image display panel. As shown in FIG. 7, the display control unit 12 c provides the image display panel 14 with a video display area 36, a guide arrow display area 38, and a neighborhood image display area 40. The video display area 36 is an area for displaying television broadcast video. The guide arrow display area 38 indicates the direction from the current horizontal position of the terrestrial digital broadcast receiving antenna 28 toward the good position with an arrow. Here, the good position is the position indicated by the position information stored in the storage unit 12i, and is the position of the reception antenna 28 for digital terrestrial broadcasting where the CN ratio is larger than the viewable value.

  First, the main processing unit 12h calculates a direction in which the terrestrial digital broadcast receiving antenna 28 should be moved based on the current horizontal position information and the horizontal position information at the good position. Next, the main processing unit 12h, based on the direction in which the terrestrial digital broadcast receiving antenna 28 should be moved and the current direction of the terrestrial digital broadcast receiving antenna 28, the direction of the arrow to be displayed in the guide arrow display area 38 To decide. Next, the guiding unit 12d issues a command to the display control unit 12c to display an arrow in the guidance arrow display area 38. With this configuration, the user can move the mobile phone 1 in the direction indicated by the arrow to move the horizontal position of the terrestrial digital broadcast receiving antenna 28 closer to the good position. Therefore, the cellular telephone device 1 can reduce the effort required for the user to adjust the position of the terrestrial digital broadcast receiving antenna 28.

  The neighborhood image display area 40 is an area for displaying a guidance captured image captured by the camera 24 in the past at a good position. The guidance captured image displayed in the nearby image display area 40 is an image showing the position and orientation of the reception antenna 28 for digital terrestrial broadcasting where the CN ratio is larger than the viewable value. First, the main processing unit 12h searches the horizontal position information stored in the storage unit 12i based on the current horizontal position of the terrestrial digital broadcast receiving antenna 28. When the horizontal position information indicating the vicinity of the current horizontal position of the terrestrial digital broadcast receiving antenna 28 is found, the guiding unit 12d displays the guide captured image associated with the horizontal position information in the vicinity image display area 40. That is, the guiding unit 12d causes the near-image display area 40 to display the guidance captured image captured by the camera 24 when the television broadcast has been stably reproduced in the past. As a result, the user can adjust the position and orientation of the mobile phone 1 with the guidance captured image as a target while confirming the guidance captured image. As a result, the cellular phone 1 can reduce the effort required for the user to adjust the position and posture of the receiving antenna 28 for digital terrestrial broadcasting.

  FIG. 8 is an explanatory diagram showing a second guide image as guide information displayed on the image display panel. When the difference between the current horizontal position and the good position of the reception antenna 28 for digital terrestrial broadcasting is equal to or less than a predetermined mode switching value, the guiding unit 12d switches the type of guidance information provided to the user. Specifically, the guiding unit 12d switches the guide image displayed on the image display panel 14 from the first guide image shown in FIG. 7 to the second guide image shown in FIG. Here, the mode switching value is a second guidance image that is a more detailed guidance image when the difference between the current horizontal position of the receiving antenna 28 for digital terrestrial broadcasting and the good position is equal to or smaller than the mode switching value. Is a value that can be determined by the user as desired.

  As illustrated in FIG. 8, the guide unit 12 d includes a video display area 36, a 3D model display area 42, an altitude guidance arrow display area 44, and a rotation direction guidance image display area 46 on the image display panel 14. . The three-dimensional model display area 42 is an area in which a guide image showing the current horizontal position and altitude of the receiving antenna 28 for digital terrestrial broadcasting in three dimensions is displayed. In the control device 12, first, the reception state calculation unit 12g calculates (acquires) the current horizontal position and altitude of the reception antenna 28 for digital terrestrial broadcasting. Next, the reception state calculation unit 12g displays the current position point 48 indicating the current horizontal position and altitude of the reception antenna 28 for digital terrestrial broadcasting on the three-dimensional model display area 42 as an image such as a circle or a rectangle. In addition, the control device 12 indicates a target position point 50 indicating a good position to be targeted by the user in the 3D model display area 42 with a guide image having a shape and color different from the current position point 48, for example.

  Here, when the user moves the mobile phone 1, the guiding unit 12 d updates the current position point 48 to be displayed in the three-dimensional model display area 42. That is, the guidance unit 12d displays the guide image in the three-dimensional model display area 42 so as to move the current position point 48 to be displayed in the three-dimensional model display area 42, similarly to the movement of the user moving the mobile phone 1. Let Here, for example, when the current position point 48 is a circle, the guiding unit 12d displays an animation in which the current position point 48 rolls toward the target position point 50 in the three-dimensional model display area 42. With the above configuration, the user moves the mobile phone 1 so that the current position point 48 shown in the three-dimensional model display area 42 is close to the target position point 50, so that the horizontal position and altitude of the reception antenna 28 for digital terrestrial broadcasting are increased. Can be adjusted. Therefore, the cellular telephone device 1 can reduce the effort required for the user to adjust the position of the terrestrial digital broadcast receiving antenna 28.

  The altitude guidance arrow display area 44 is an area where a guidance image indicating the current altitude of the terrestrial digital broadcast receiving antenna 28 is displayed. In the reception state calculation unit 12g, first, the main processing unit 12h calculates (acquires) the current altitude of the reception antenna 28 for digital terrestrial broadcasting. Next, in the main processing unit 12h, the main processing unit 12h acquires from the storage unit 12i the altitude of a good position that is targeted by the user. Based on the current altitude of the terrestrial digital broadcast receiving antenna 28 and the altitude of the good position, the guiding unit 12d guides an arrow in the direction in which the terrestrial digital broadcast receiving antenna 28 should be moved among the two vertical directions. The image is displayed in the altitude guidance arrow display area 44 as an image. With this configuration, the user can adjust the altitude of the mobile phone 1 while confirming the arrow displayed in the altitude guidance arrow display area 44. As a result, the mobile phone 1 can reduce the effort required for the user to adjust the altitude of the terrestrial digital broadcast receiving antenna 28.

  Here, for example, the control device 12 displays a total of two arrows in two directions in the vertical direction in the altitude guidance arrow display area 44, and blinks only the arrow in the direction in which the digital terrestrial broadcast receiving antenna 28 should be moved, for example. In this way, an arrow may be displayed in the altitude guidance arrow display area 44 as a guidance image. In the case of this configuration, the guiding unit 12d increases the speed at which the arrow displayed in the altitude guidance arrow display area 44 blinks as the difference between the current altitude of the terrestrial digital broadcast receiving antenna 28 and the altitude at the good position becomes smaller. Faster is preferred. In the case of this configuration, the mobile phone 1 can make the user more intuitively grasp the difference between the current altitude of the terrestrial digital broadcast receiving antenna 28 and the altitude of the good position based on the blinking speed of the arrow. .

  The rotation direction guide image display area 46 is an area where a guide image for adjusting the posture of the reception antenna 28 for digital terrestrial broadcasting is displayed. First, the receiving state calculation unit 12g calculates (acquires) the current direction and inclination of the terrestrial digital broadcast receiving antenna 28. Next, the main processing unit 12h acquires from the storage unit 12i the direction and inclination of a good posture to be targeted by the user. Here, the good posture is the posture indicated by the posture information stored in the storage unit 12i and is the posture of the terrestrial digital broadcast receiving antenna 28 in which the CN ratio is larger than the viewable value.

  Based on the current direction of the reception antenna 28 for digital terrestrial broadcasting and the direction of the good posture, the control device 12 uses the direction in which the mobile phone 1 should be rotated about the axis along the vertical direction as an arrow as a guide image. Is displayed in the rotation direction guide image display area 46. Further, the control device 12 indicates the direction in which the mobile phone 1 should be rotated about an axis parallel to the horizontal plane based on the current inclination of the digital terrestrial broadcasting receiving antenna 28 and the inclination of the good posture. Is displayed in the rotation direction guide image display area 46 with an arrow. With this configuration, the user can adjust the direction and inclination of the mobile phone 1 while confirming the arrow displayed in the rotation direction guide image display area 46. Thereby, the mobile phone 1 can reduce the effort required for the user to adjust the direction and inclination of the reception antenna 28 for digital terrestrial broadcasting.

  Here, the guide image displayed on the image display panel 14 by the guiding unit 12d is not limited to the figures as shown in FIGS. The guiding unit 12d may cause the image display panel 14 to display an image corresponding to a word for guiding the user, a so-called text image. The guide image in this case is, for example, “Please go straight for another 1 m”, “Please raise it by another 50 cm”, “Rotate it about 10 degrees clockwise”, “Inclin it about 10 degrees”, etc. It is a text image. Even with this configuration, the mobile phone 1 allows the user to adjust the position and orientation of the terrestrial digital broadcast receiving antenna 28 by checking the guide image displayed on the image display panel 14.

  The guiding unit 12d may output the guidance sound from the speaker 22 together with the guidance image. The guidance voice in this case is a voice guide that can be substituted for the guidance images shown in FIGS. The guidance voice is, for example, “Please go straight for another 1 m”, “Give it up 50 cm”, “Rotate it about 10 degrees clockwise”, “Inclin it about 10 degrees”, etc. is there. With this configuration, the mobile phone 1 allows the user to adjust the position and orientation of the digital terrestrial broadcast receiving antenna 28 without the user confirming the image display panel 14.

  Note that the guiding unit 12d may be configured to output only the guidance voice from the speaker 22 without displaying the guidance image on the image display panel 14, for example. Even in this case, when the user follows the voice guidance, the cellular phone 1 can reduce the effort required for the user to adjust the position and posture of the receiving antenna 28 for digital terrestrial broadcasting. However, using the guide image, the mobile phone 1 conveys the target position of the digital terrestrial broadcast reception antenna 28 and the good posture of the digital terrestrial broadcast reception antenna 28 to the user using vision. Can do.

  Here, it returns to description of a guidance procedure. When step ST205 shown in FIG. 6 is executed, in step ST206, the main processing unit 12h determines whether or not the current CN ratio is larger than the viewable value. When the current CN ratio is less than or equal to the viewable value (step ST206, No), the control device 12 executes step ST205 again. That is, the control device 12 continues guiding the terrestrial digital broadcast receiving antenna 28 by the guiding unit 12d until the current CN ratio becomes larger than the viewable value. That is, in the control device 12, the guidance unit 12d continues to display the guide image on the image display panel 14 until the current CN ratio becomes larger than the viewable value. When the current CN ratio is larger than the viewable value (step ST206, Yes), the control device 12 ends the guidance procedure.

  By executing the learning procedure and the guidance procedure described above, the control device 12 causes the signal strength calculation unit 12f to calculate the strength of the television broadcast signal, and when the signal strength is greater than a predetermined viewable value, The reception state calculation unit 12g calculates the position and orientation of the terrestrial digital broadcast receiving antenna 28. In the control device 12, the storage unit 12i stores the strength information and the position information and the posture information of the reception antenna 28 for digital terrestrial broadcasting in association with each other. Then, the control device 12 transmits information for guiding the terrestrial digital broadcast receiving antenna 28 so that the position of the terrestrial digital broadcast receiving antenna 28 becomes the position and orientation stored in the storage unit 12i. To the user. The user can adjust the position and posture of the reception antenna 28 for digital terrestrial broadcasting by moving the mobile phone 1 based on the information provided from the guiding unit 12d. As a result, the cellular phone 1 can reduce the effort required for the user to adjust the position and posture of the terrestrial digital broadcast receiving antenna 28.

  Here, in the present embodiment, the horizontal position information, altitude information, direction information, inclination information, and guidance captured image of the reception antenna for digital terrestrial broadcasting 28 when the CN ratio exceeds the viewable value, Although the mobile phone configured to store the signal strength information in association with the storage unit 12i has been described, the configuration of the mobile phone is not limited to the above configuration. The mobile phone may be configured to store at least the current horizontal position of the terrestrial digital broadcast receiving antenna 28 and the signal strength information in the storage unit 12i in association with each other. If at least the current horizontal position of the terrestrial digital broadcast receiving antenna 28 is associated with the signal strength information and stored in the storage unit 12i, the mobile phone 1 has a CN ratio larger than the viewable value. In addition, it is possible to provide the user with the minimum information necessary to guide the terrestrial digital broadcast receiving antenna 28.

  The effective order of information for guiding the terrestrial digital broadcast receiving antenna 28 includes the current horizontal position information of the terrestrial digital broadcast receiving antenna 28, the captured image for guidance, and the terrestrial digital broadcast receiving antenna 28 in order of validity. The direction information, the inclination information of the terrestrial digital broadcast receiving antenna 28, and the altitude information of the terrestrial digital broadcast receiving antenna 28 are in this order. By storing these pieces of information as learning data in the storage unit 12i, the cellular phone 1 can provide the user with more accurate information for guiding the digital terrestrial broadcast receiving antenna 28 to a desired good position and good posture. . Further, by storing altitude information in the storage unit 12i in addition to the horizontal position information, the main processing unit 12h may have played back a television broadcast in the past when the current position of the terrestrial digital broadcast receiving antenna 28 has been reached. It is possible to more accurately determine whether or not it is a position. As a result, the mobile phone 1 can provide the user with more accurate information for guiding the terrestrial digital broadcast receiving antenna 28 to a good position and good posture.

  Further, as a technique for accumulating more learning data, for example, the mobile phone 1 is preferably configured to exchange information with a server. The mobile phone 1 exchanges information with a server, for example, wirelessly. In this case, the server has learning data acquired from another mobile phone or a mobile television device equipped with a communication device, that is, the current horizontal position of the reception antenna 28 for digital terrestrial broadcasting that can stably reproduce the television broadcast. Information, a captured image for guidance, direction information of the terrestrial digital broadcast receiving antenna 28, tilt information of the terrestrial digital broadcast receiving antenna 28, and altitude information of the terrestrial digital broadcast receiving antenna 28 are accumulated. The mobile phone 1 acquires these learning data from the server, so that, for example, even if the user's mobile phone 1 has never played a television broadcast at that position in the past, the mobile phone 1 can be stably It is possible to provide the user with guidance information regarding the position and orientation of the terrestrial digital broadcast receiving antenna 28 that can reproduce the broadcast. Therefore, the mobile phone 1 can reduce the user's effort required to reproduce the television broadcast more suitably.

  As described above, the portable television device according to the present invention is useful for reducing the user's effort required to reproduce the television broadcast.

DESCRIPTION OF SYMBOLS 1 Cellular phone 10 Case 10a 1st case 10b 2nd case 12 Control apparatus 12a Audio | voice processing part 12b Communication part 12c Display control part 12d Guidance part 12e Broadcast signal receiving part 12f Signal strength calculation part 12g Reception state calculation part 12h Main processing unit 12i Storage unit 12j I / O interface 14 Image display panel 16 Operation unit 18 Microphone 20 Receiver 22 Speaker 24 Camera 26 GPS antenna 28 Terrestrial digital broadcast receiving antenna 30 Geomagnetic sensor 32 Acceleration sensor 34 Barometric pressure sensor 36 Video display area 38 Guide arrow display area 40 Neighborhood image display area 42 3D model display area 44 Altitude guide arrow display area 46 Rotation direction guide image display area 48 Current position point 50 Target position point

Claims (12)

A receiver for receiving television broadcast signals;
A signal strength acquisition unit that acquires the strength of the signal received by the reception unit;
A reception state acquisition unit that acquires at least a position of the reception unit when the intensity of the signal is larger than a predetermined viewable value;
A storage unit that associates and stores intensity information related to the intensity of the signal acquired by the signal intensity acquisition unit and position information related to the position of the reception unit acquired by the reception state acquisition unit;
A guidance unit that provides information for guiding the reception unit so that the position of the reception unit is the position indicated by the position information stored in the storage unit when receiving the signal;
A portable television device comprising: The reception state acquisition unit further acquires the attitude of the reception unit when the intensity of the signal is greater than the viewable value,
In addition to the intensity information and the position information, the storage unit further stores, in association with each other, posture information regarding the posture of the receiving unit acquired by the reception-time state acquisition unit,
The guidance unit further provides information for guiding the receiving unit such that the posture of the receiving unit becomes a posture indicated by the posture information stored in the storage unit. Item 2. The portable television device according to Item 1.   The portable television device according to claim 2, wherein the posture information includes direction information related to an orientation of the receiving unit on a horizontal plane.   The portable television device according to claim 2, wherein the posture information includes inclination information related to an inclination of the receiving unit with respect to a vertical direction.   5. The guide unit according to claim 1, wherein the guide unit provides information for guiding the reception unit when a current intensity of the signal is equal to or less than the viewable value. The portable television device according to the item.   6. The portable television device according to claim 1, wherein the position information includes horizontal position information regarding a position of the receiving unit on a horizontal plane.   The portable television device according to claim 1, wherein the position information includes altitude information related to a height of the receiving unit in a vertical direction. A display unit for displaying images;
The portable television according to claim 1, wherein the guide unit displays an image as a guide image on the display unit as information for guiding the receiving unit. apparatus. Comprising imaging means,
The reception state acquisition unit acquires an image from the imaging unit when the intensity of the signal is larger than the viewable value,
The storage unit stores the intensity information and the image captured by the imaging unit in association with each other,
9. The portable television device according to claim 8, wherein the guide unit displays, as information for guiding the receiving unit, an image captured by the imaging unit on the display unit as a captured image for guidance. .   The portable television device according to claim 8 or 9, wherein the display unit simultaneously displays a television broadcast video and the guide image.   The guide unit causes the display unit to display, as the guide image, an image indicating the position of the reception unit on a horizontal plane and the position of the reception unit in the vertical direction as the guide image. The portable television device according to claim 10.   When the difference between the current position of the receiving unit and the position indicated by the position information stored in the storage unit is less than a predetermined mode switching value, the guide unit and the current position of the receiving unit The information different from the case where the difference from the position indicated by the position information stored in the storage unit is greater than or equal to the mode switching value is provided as information for guiding the receiving unit. The portable television device according to any one of claims 1 to 11.

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