WO2016072020A1 - Digital broadcast receiver - Google Patents

Digital broadcast receiver Download PDF

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Publication number
WO2016072020A1
WO2016072020A1 PCT/JP2014/079607 JP2014079607W WO2016072020A1 WO 2016072020 A1 WO2016072020 A1 WO 2016072020A1 JP 2014079607 W JP2014079607 W JP 2014079607W WO 2016072020 A1 WO2016072020 A1 WO 2016072020A1
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WO
WIPO (PCT)
Prior art keywords
broadcast
current position
digital broadcast
emergency
unit
Prior art date
Application number
PCT/JP2014/079607
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French (fr)
Japanese (ja)
Inventor
良輔 梅野
晃 山崎
Original Assignee
三菱電機株式会社
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Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2014/079607 priority Critical patent/WO2016072020A1/en
Publication of WO2016072020A1 publication Critical patent/WO2016072020A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk

Definitions

  • the present invention relates to a digital broadcast receiving apparatus having a function of receiving an emergency warning signal transmitted by being superimposed on a digital broadcast wave.
  • Emergency signal is transmitted superimposed on digital broadcast wave such as TV and radio.
  • the operation of the emergency warning signal should be limited to the minimum necessary area in an emergency due to its characteristics, but it can be operated outside the above-mentioned category in terms of standards and specifications. For this reason, even an emergency warning signal presumed to be unnecessary for the end user outside the above category has been notified.
  • the current location management unit identifies the current location of the device from the GPS (Global Positioning System) information or the broadcast station information indicating the broadcast region of the emergency alarm signal transmission broadcast station. It was determined whether it was included in the target area of emergency warning broadcasting (Emergency Warning System), and the minimum emergency warning signal was notified.
  • GPS Global Positioning System
  • broadcast station information indicating the broadcast region of the emergency alarm signal transmission broadcast station. It was determined whether it was included in the target area of emergency warning broadcasting (Emergency Warning System), and the minimum emergency warning signal was notified.
  • the conventional digital broadcast wave receiver is configured as described above, a special positioning means such as GPS is required. Moreover, when neither GPS information nor the broadcast station information of the emergency alert signal transmission broadcast station can be acquired, there is a problem that the notification of the emergency alert signal cannot be restricted because the current position cannot be specified.
  • the present invention has been made to solve the above-described problems, and does not require special positioning means such as GPS, and even when the broadcast station information of the emergency alert signal transmission broadcast station cannot be received.
  • the purpose of this is to determine whether or not it is included in the warning target area of the emergency warning signal.
  • a digital broadcast receiving apparatus includes a receiver that receives a digital broadcast wave, an alarm detector that detects an emergency warning signal superimposed on the digital broadcast wave received by the receiver, and notifies the user of the emergency warning signal
  • the current position determination unit for determining the current position of the digital broadcast receiving device using the current position of the digital broadcast receiving device and the current position of the digital broadcast receiving device determined by the current position determining unit It determines whether or not included in the target area, in which and a warning notification determination unit that instructs a notification to the user of the emergency alarm signal to the alarm notifying unit if included.
  • digital broadcast reception is performed using broadcast station information of one or more broadcast stations that can receive digital broadcast waves in a reception unit, including an emergency alert signal transmission broadcast station that is transmitting an emergency alert signal. Since the current position of the device is determined, no special positioning means such as GPS is required, and even if the broadcast station information of the emergency alert signal transmission broadcast station cannot be received, the alarm target of the emergency alert signal It can be determined whether it is included in the area.
  • FIG. 4 is a flowchart showing a current position determination procedure of the digital broadcast receiving apparatus according to the first embodiment.
  • 6 is a diagram illustrating an example of a list of receivable stations of the digital broadcast receiving apparatus according to Embodiment 1.
  • FIG. It is a figure which shows another example of the receivable station list of the digital broadcast receiver which concerns on Embodiment 1.
  • FIG. 4 is a flowchart showing a current position determination procedure of the digital broadcast receiving apparatus according to the first embodiment.
  • 6 is a diagram illustrating an example of a list of receivable stations of the digital broadcast receiving apparatus according to Embodiment 1.
  • FIG. It is a figure which shows another example of the receivable station list of the digital broadcast receiver which concerns on Embodiment 1.
  • the digital broadcast receiving apparatus includes a receiving unit 1, an alarm detecting unit 2, a receivable station acquiring unit 3, a current position determining unit 4, an alarm notification determining unit 5, and an alarm notification unit. 6 is included.
  • the receiving unit 1 includes an antenna and a tuner.
  • the alarm detection unit 2, the receivable station acquisition unit 3, the current position determination unit 4, and the alarm notification determination unit 5 are functions realized by a CPU (Central Processing Unit) executing a program stored in a memory.
  • the alarm notification unit 6 includes a display or a speaker.
  • the receiving unit 1 receives a digital broadcast wave transmitted from a broadcasting station, demodulates it, and outputs a received signal.
  • the reception signal is input to the alarm detection unit 2 and the receivable station acquisition unit 3, respectively.
  • the alarm detection unit 2 detects whether or not an emergency alarm signal is superimposed on the reception signal of the reception unit 1.
  • the detection result of the emergency warning signal is input to the current position determination unit 4.
  • the emergency warning signal is input to the warning notification determination unit 5.
  • the receivable station acquisition unit 3 acquires information on broadcast stations that can receive digital broadcast waves from the reception signal of the reception unit 1, and generates and manages a list and the like.
  • a broadcast station that can receive digital broadcast waves is called a receivable station
  • a list that manages information on receivable stations is called a receivable station list.
  • the receivable station includes an emergency alert signal transmission broadcast station that transmits an emergency alert signal superimposed on a digital broadcast wave.
  • information such as a channel (frequency) of a receivable station, a broadcast station name, a service name, a broadcast station ID, a service ID, a region ID, and a reception status is described. Since the operation of digital broadcasting varies depending on the country or the like, a list of formats conforming to the operation in the country or the like using the digital broadcast receiving apparatus can be used.
  • the receivable station acquisition unit 3 determines whether or not reception is possible based on the reception environment and reception status of a digital broadcast wave, for example, every time a channel search is performed periodically by the reception unit 1, and information on the broadcast station determined to be receivable It registers in the receivable station list or deletes information on broadcast stations that are determined to be unreceivable from the receivable station list. As a result, it is possible to grasp the currently receivable broadcasting stations in the traveling vehicle.
  • the reception environment can be evaluated by received power, SNR (Signal to Noise Ratio), CNR (Carrier to Noise Ratio), or the like.
  • the reception status can be evaluated based on the error coverage in BER (Bit Error Ratio) or PER (Packet Error Ratio).
  • the current position determination unit 4 determines the current position of the digital broadcast receiving device with reference to the receivable station list of the receivable station acquisition unit 3 when an emergency warning signal is detected in the alarm detection unit 2.
  • the current position is input to the alarm notification determination unit 5.
  • the current position determination procedure of the current position determination unit 4 will be described later.
  • the alarm notification determination unit 5 determines whether or not the current position of the current position determination unit 4 is included in the alarm target area of the emergency alarm signal when the emergency detection signal is detected by the alarm detection unit 2.
  • the warning notification determination unit 5 instructs the warning notification unit 6 to notify an emergency warning signal when the current position is included in the warning target area.
  • the information indicating the warning target area of the emergency warning signal is included in the emergency warning signal, for example.
  • the alarm notification unit 6 notifies the end user of the emergency alarm signal of the alarm detection unit 2 when the notification of the emergency alarm signal is instructed from the alarm notification determination unit 5.
  • the notification method of the emergency warning signal to the end user may be any method such as display display or speaker output.
  • FIG. 1 illustrates a function relating to an emergency warning signal among various functions constituting the digital broadcast receiving apparatus.
  • this digital broadcast receiving apparatus may have a function of encoding a received signal, converting it into video and audio information, and outputting the information from a display and a speaker.
  • the current position determination unit 4 executes the flowchart of FIG. 2 when notified from the alarm detection unit 2 that an emergency alarm signal is superimposed on the received signal.
  • the current position determination unit 4 first determines whether or not it is possible to acquire broadcast station information indicating a transmission target area (hereinafter referred to as a broadcast area) of a digital broadcast wave transmitted by an emergency alert signal transmission broadcast station (step ST1). ).
  • the broadcast station information corresponds to the area ID included in the received signal from the emergency alert signal transmission broadcast station.
  • Broadcast station information of receivable stations including emergency alert signal transmission broadcast stations can be used in accordance with digital broadcast operations in countries where digital broadcast receivers are used.
  • the broadcasting region can be specified from the area code of the terrestrial digital distribution descriptor described in NIT (Network Information Table) in the PSI (Program Specific Information) data included in the received signal. It is.
  • NIT Network Information Table
  • PSI Program Specific Information
  • the area code of the terrestrial digital distribution descriptor of NIT is not operated as in digital broadcasting in Korea and China, other information in place of the area code can be used.
  • a Region Code is sent in an ID unique to a broadcasting station called an Ensemble ID, and the broadcasting area can be specified from this Region Code.
  • the current position determination unit 4 may acquire the broadcast station information of the emergency alert signal transmission broadcast station from the list of receivable stations of the receivable station acquisition unit 3 or the emergency that is being received by the reception unit 1. You may acquire from the received signal from an alarm signal transmission broadcast station.
  • the current position determination unit 4 digitally broadcasts the broadcast area indicated by the broadcast station information of the acquired emergency alert signal transmission broadcast station.
  • the current position of the receiving device is set (step ST2).
  • the broadcast area specified by the area ID included in the received signal from the emergency alert signal transmitting broadcast station is the current position of the digital broadcast receiving apparatus.
  • the current position of the digital broadcast receiving device specified from one piece of broadcast station information (for example, the above-mentioned area ID) is referred to as “limited current position information”.
  • a case where the current position of the digital broadcast receiving apparatus covers a plurality of broadcast areas indicated by a plurality of broadcast station information is referred to as “broad current position information”. An example of “broad current position information” will be described later.
  • the current position determination unit 4 refers to the receivable station list of the receivable station acquisition unit 3 and The presence / absence of a broadcast station capable of receiving broadcast waves is determined (step ST3).
  • the current position determination unit 4 obtains broadcast station information of all the receivable stations from the receivable station list. Obtain (step ST4). Subsequently, the current position determination unit 4 determines whether or not the current position of the digital broadcast receiving apparatus can be derived from the broadcast station information of all receivable broadcast stations (step ST5). For the determination in step ST5, majority determination or the like is used.
  • the current position determination unit 4 is based on the broadcast station information (for example, the above-described area ID), “Limited current position information” of the digital broadcast receiving apparatus is derived (step ST6).
  • the broadcasting area specified by the broadcasting station information having the largest number among the broadcasting station information of all the receivable broadcasting stations by the majority decision is determined as the current position (limited current position) of the digital broadcast receiving apparatus. Information).
  • the current position determination unit 4 determines the broadcast station information (for example, the above-described area ID). Based on the above, “broad current position information” of the digital broadcast receiving apparatus is derived (step ST7).
  • the case where the current position cannot be derived from the broadcast station information of all receivable broadcast stations is the case where there is a plurality of broadcast station information having the largest number and it cannot be narrowed down to one broadcast station information by majority decision. .
  • a plurality of broadcast areas specified by a plurality of the largest number of broadcast station information becomes the current position (broad current position information) of the digital broadcast receiver.
  • the current position information derived by the above procedure is determined by the alarm notification determination unit 5 as to whether or not it is included in the alarm target area.
  • the warning notification determination unit 5 instructs the warning notification unit 6 to notify an emergency warning signal when the current position of the digital broadcast receiving device is included in the warning target region, and does not indicate when it is not included in the warning target region. .
  • the broadcast station transmits the emergency alert signal not only in an emergency but comprehensively, an effect of suppressing the notification of the emergency alert signal which is estimated to be not really necessary for the end user can be obtained.
  • the current position determination unit 4 cannot derive the current position information of the digital broadcast receiver (step ST8). In this case, the current position determination unit 4 notifies the alarm notification determination unit 5 that the current position cannot be derived, and the alarm notification determination unit 5 determines to notify the emergency alarm signal without performing the restriction based on the current position.
  • FIG. 3 is an example of a list of receivable stations, and shows the broadcast station names and area IDs of receivable stations.
  • the broadcasting station A is an emergency warning signal transmission broadcasting station.
  • the area ID of the emergency alert signal transmitting broadcast station A is not in the receivable station list (step ST1 “NO”). Therefore, the current position determination unit 4 acquires the area IDs of the broadcasting stations B to F from the receivable station list (step ST3 “YES” and step ST4).
  • FIG. 4 is another example of the receivable station list, and shows the broadcast station name and area ID of the receivable stations.
  • the broadcasting station A is an emergency warning signal transmission broadcasting station.
  • one or more broadcast stations that can receive digital broadcast waves in the reception unit 1, including an emergency alert signal transmission broadcast station that transmits an emergency alert signal.
  • an emergency alert signal transmission broadcast station that transmits an emergency alert signal.
  • the receivable station acquisition unit 3 when the emergency alarm signal is detected by the alarm detection unit 2 and the receivable station acquisition unit 3 that acquires the broadcast station information indicating the broadcasting area
  • Current position determination unit 4 that determines the current position of the digital broadcast receiving device using the broadcast station information that has been made, and the current position of the digital broadcast reception device determined by the current position determination unit 4 is the warning target area of the emergency warning signal It was determined whether or not it is included, and when included, the alarm notification determination unit 5 that instructs the alarm notification unit 6 to notify the user of an emergency warning signal.
  • the current position can be determined only from the broadcast station information of receivable broadcast stations, a special positioning means such as GPS becomes unnecessary. Moreover, even if it is a case where the broadcast station information of an emergency alert signal transmission broadcast station cannot be received, it can be determined whether it is included in the warning object area of an emergency alert signal.
  • the current position determination unit 4 can acquire the broadcast station information when the receivable station acquisition unit 3 can acquire the broadcast station information from the digital broadcast wave of the emergency alert signal transmission broadcast station.
  • the emergency alert signal transmission broadcast station The broadcast station information of one or more broadcast stations that can receive digital broadcast waves is determined by majority decision, and the broadcast area indicated by the most broadcast station information is determined as the current position of the digital broadcast receiver. For this reason, no special positioning means such as GPS is required, and even if the broadcast station information of the emergency alert signal transmission broadcast station cannot be received, the most probable current position is identified and the alert target of the emergency alert signal It can be determined whether it is included in the area.
  • the current position determination unit 4 determines that the majority of the broadcast station information is found as a result of majority decision, a plurality of broadcast regions indicated by the plurality of broadcast station information Is determined to be the current position of the digital broadcast receiver. Therefore, even if a special positioning means such as GPS is not required, the broadcast station information of the emergency alert signal transmission broadcast station cannot be received, and the most probable current position cannot be specified by majority decision, It is possible to determine a range that is highly likely to be and whether it is included in the warning target area of the emergency warning signal.
  • Embodiment 1 described above the case where the digital broadcast receiving apparatus is mounted on a vehicle is shown, but it can be mounted on a mobile body including a person, a railroad, a ship, an aircraft, and the like in addition to the vehicle.
  • the modification of the said Embodiment 1 is shown.
  • the alarm notification determination unit 5 determines that the emergency alarm signal detected by the alarm detection unit 2 is highly urgent, the determination by the current position determination unit 4 is skipped and the restriction based on the current position is not performed. It is possible to instruct the alarm notification unit 6 to notify an emergency alarm signal.
  • the current position determination unit 4 makes a majority decision on the broadcast station information of all receivable stations including the emergency alert signal transmission broadcast station regardless of whether the broadcast station information of the emergency alert signal transmission broadcast station can be acquired, It is possible to determine the current position.
  • the present invention can be modified with any component of the embodiment or omitted with any component.
  • the digital broadcast receiving apparatus determines the current position using the broadcast station information of a broadcast station capable of receiving a digital broadcast wave, it is suitable for use in a digital broadcast receiving apparatus for a mobile object. ing.
  • 1 reception unit 2 alarm detection unit, 3 receivable station acquisition unit, 4 current position determination unit, 5 alarm notification determination unit, 6 alarm notification unit.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

A digital broadcast receiver comprises: a receivable station acquisition unit 3 that acquires, from among digital broadcast waves, broadcast station information indicating the broadcast areas of one or more broadcast stations which includes emergency alarm signal transmission broadcast stations currently transmitting emergency alarm signals and of which the digital broadcast waves can be received by a reception unit 1; a current position determination unit 4 that, if any emergency alarm signal is detected by an alarm detection unit 2, determines a current position of the digital broadcast receiver by use of the broadcast station information acquired by the receivable station acquisition unit 3; and an alarm notification determination unit 5 that determines whether or not the current position of the digital broadcast receiver determined by the current position determination unit 4 is included in an alarm target area of the emergency alarm signal and that, if yes, instructs an alarm notification unit 6 to notify the user of the emergency alarm signal.

Description

デジタル放送受信装置Digital broadcast receiver
　この発明は、デジタル放送波に重畳して送信される緊急警報信号を受信する機能を備えたデジタル放送受信装置に関するものである。 The present invention relates to a digital broadcast receiving apparatus having a function of receiving an emergency warning signal transmitted by being superimposed on a digital broadcast wave.
　緊急警報信号は、テレビおよびラジオ等のデジタル放送波に重畳して送信されている。緊急警報信号の運用はその特性上、緊急時でかつ必要最低限の地域に限定されるべきであるが、規格および仕様上は、先述の範疇外での運用が可能である。そのため、先述の範疇外のエンドユーザにとって必要ないと推測される緊急警報信号まで通知されていた。 Emergency signal is transmitted superimposed on digital broadcast wave such as TV and radio. The operation of the emergency warning signal should be limited to the minimum necessary area in an emergency due to its characteristics, but it can be operated outside the above-mentioned category in terms of standards and specifications. For this reason, even an emergency warning signal presumed to be unnecessary for the end user outside the above category has been notified.
　そこで、特許文献１のデジタル放送受信装置では、現在地域管理部によりＧＰＳ（Ｇｌｏｂａｌ　Ｐｏｓｉｔｉｏｎｉｎｇ　Ｓｙｓｔｅｍ）情報または緊急警報信号送信放送局の放送地域を示す放送局情報から自装置の現在位置を特定することで、緊急警報放送（Ｅｍｅｒｇｅｎｃｙ　Ｗａｒｎｉｎｇ　Ｓｙｓｔｅｍ）の対象地域に含まれているか否かを判定し、必要最低限の緊急警報信号を通知していた。 Therefore, in the digital broadcast receiving device of Patent Document 1, the current location management unit identifies the current location of the device from the GPS (Global Positioning System) information or the broadcast station information indicating the broadcast region of the emergency alarm signal transmission broadcast station. It was determined whether it was included in the target area of emergency warning broadcasting (Emergency Warning System), and the minimum emergency warning signal was notified.
特開２０１０－３５０８５号公報JP 2010-35085 A
　従来のデジタル放送波受信装置は以上のように構成されているので、ＧＰＳ等の特別な測位手段が必要であった。また、ＧＰＳ情報および緊急警報信号送信放送局の放送局情報のいずれも取得できない場合、現在位置の特定が不可能なため、緊急警報信号の通知を制限できないという課題があった。 Since the conventional digital broadcast wave receiver is configured as described above, a special positioning means such as GPS is required. Moreover, when neither GPS information nor the broadcast station information of the emergency alert signal transmission broadcast station can be acquired, there is a problem that the notification of the emergency alert signal cannot be restricted because the current position cannot be specified.
　この発明は、上記のような課題を解決するためになされたもので、ＧＰＳ等の特別な測位手段を必要とせず、また緊急警報信号送信放送局の放送局情報を受信できない場合であっても、緊急警報信号の警報対象地域に含まれているか否かを判定することを目的とする。 The present invention has been made to solve the above-described problems, and does not require special positioning means such as GPS, and even when the broadcast station information of the emergency alert signal transmission broadcast station cannot be received. The purpose of this is to determine whether or not it is included in the warning target area of the emergency warning signal.
　この発明に係るデジタル放送受信装置は、デジタル放送波を受信する受信部と、受信部により受信したデジタル放送波に重畳された緊急警報信号を検出する警報検出部と、緊急警報信号をユーザに通知する警報通知部とを備えるデジタル放送受信装置であって、緊急警報信号を送信している緊急警報信号送信放送局を含む、受信部においてデジタル放送波を受信可能な１つ以上の放送局の放送地域を示す放送局情報を、当該デジタル放送波の中から取得する受信可能局取得部と、警報検出部により緊急警報信号が検出された場合に、受信可能局取得部により取得された放送局情報を用いてデジタル放送受信装置の現在位置を判定する現在位置判定部と、現在位置判定部により判定されたデジタル放送受信装置の現在位置が緊急警報信号の警報対象地域に含まれるか否かを判定し、含まれる場合に緊急警報信号のユーザへの通知を警報通知部に指示する警報通知判定部とを備えるものである。 A digital broadcast receiving apparatus according to the present invention includes a receiver that receives a digital broadcast wave, an alarm detector that detects an emergency warning signal superimposed on the digital broadcast wave received by the receiver, and notifies the user of the emergency warning signal A broadcast receiver of an at least one broadcasting station capable of receiving a digital broadcast wave at a receiving unit, including an emergency alert signal transmitting broadcasting station that transmits an emergency alert signal. Broadcast station information acquired by the receivable station acquisition unit when an emergency warning signal is detected by the receivable station acquisition unit and the alarm detection unit that acquire broadcast station information indicating the area from the digital broadcast wave The current position determination unit for determining the current position of the digital broadcast receiving device using the current position of the digital broadcast receiving device and the current position of the digital broadcast receiving device determined by the current position determining unit It determines whether or not included in the target area, in which and a warning notification determination unit that instructs a notification to the user of the emergency alarm signal to the alarm notifying unit if included.
　この発明によれば、緊急警報信号を送信している緊急警報信号送信放送局を含む、受信部においてデジタル放送波を受信可能な１つ以上の放送局の放送局情報を用いて、デジタル放送受信装置の現在位置を判定するようにしたので、ＧＰＳ等の特別な測位手段を必要とせず、また緊急警報信号送信放送局の放送局情報を受信できない場合であっても、緊急警報信号の警報対象地域に含まれているか否かを判定することができる。 According to the present invention, digital broadcast reception is performed using broadcast station information of one or more broadcast stations that can receive digital broadcast waves in a reception unit, including an emergency alert signal transmission broadcast station that is transmitting an emergency alert signal. Since the current position of the device is determined, no special positioning means such as GPS is required, and even if the broadcast station information of the emergency alert signal transmission broadcast station cannot be received, the alarm target of the emergency alert signal It can be determined whether it is included in the area.
この発明の実施の形態１に係るデジタル放送受信装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the digital broadcast receiver which concerns on Embodiment 1 of this invention. 実施の形態１に係るデジタル放送受信装置の現在位置判定手順を示すフローチャートである。4 is a flowchart showing a current position determination procedure of the digital broadcast receiving apparatus according to the first embodiment. 実施の形態１に係るデジタル放送受信装置の受信可能局リストの一例を示す図である。6 is a diagram illustrating an example of a list of receivable stations of the digital broadcast receiving apparatus according to Embodiment 1. FIG. 実施の形態１に係るデジタル放送受信装置の受信可能局リストの別の例を示す図である。It is a figure which shows another example of the receivable station list of the digital broadcast receiver which concerns on Embodiment 1. FIG.
　以下、この発明をより詳細に説明するために、この発明を実施するための形態について、添付の図面に従って説明する。
実施の形態１．
　図１に示すように、実施の形態１に係るデジタル放送受信装置は、受信部１、警報検出部２、受信可能局取得部３、現在位置判定部４、警報通知判定部５および警報通知部６を含む。受信部１は、アンテナおよびチューナ等により構成されている。警報検出部２、受信可能局取得部３、現在位置判定部４および警報通知判定部５は、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）がメモリに記憶されているプログラムを実行することにより実現される機能である。警報通知部６は、ディスプレイまたはスピーカ等により構成されている。 Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
As shown in FIG. 1, the digital broadcast receiving apparatus according to Embodiment 1 includes a receiving unit 1, an alarm detecting unit 2, a receivable station acquiring unit 3, a current position determining unit 4, an alarm notification determining unit 5, and an alarm notification unit. 6 is included. The receiving unit 1 includes an antenna and a tuner. The alarm detection unit 2, the receivable station acquisition unit 3, the current position determination unit 4, and the alarm notification determination unit 5 are functions realized by a CPU (Central Processing Unit) executing a program stored in a memory. . The alarm notification unit 6 includes a display or a speaker.
　以下では、車両等の移動体に搭載されるデジタル放送受信装置を例にして説明する。
　受信部１は、放送局が送信するデジタル放送波を受信し、復調して、受信信号を出力する。受信信号は、警報検出部２および受信可能局取得部３にそれぞれ入力される。 Hereinafter, a digital broadcast receiving apparatus mounted on a moving body such as a vehicle will be described as an example.
The receiving unit 1 receives a digital broadcast wave transmitted from a broadcasting station, demodulates it, and outputs a received signal. The reception signal is input to the alarm detection unit 2 and the receivable station acquisition unit 3, respectively.
　警報検出部２は、受信部１の受信信号に緊急警報信号が重畳されているか否かを検出する。緊急警報信号の検出結果は、現在位置判定部４に入力される。また、緊急警報信号は、警報通知判定部５に入力される。 The alarm detection unit 2 detects whether or not an emergency alarm signal is superimposed on the reception signal of the reception unit 1. The detection result of the emergency warning signal is input to the current position determination unit 4. The emergency warning signal is input to the warning notification determination unit 5.
　受信可能局取得部３は、受信部１の受信信号の中から、デジタル放送波を受信可能な放送局の情報を取得し、リスト等を生成して管理する。以下では、デジタル放送波を受信可能な放送局を受信可能局と呼び、受信可能局の情報を管理するリストを受信可能局リストと呼ぶ。受信可能局は、緊急警報信号をデジタル放送波に重畳して送信している緊急警報信号送信放送局を含む。受信可能局リストには、例えば、受信可能局のチャネル（周波数）、放送局名、サービス名、放送局ＩＤ、サービスＩＤ、地域ＩＤ、および受信状況等の情報が記載される。なお、デジタル放送の運用は国等によって異なるため、デジタル放送受信装置を使用する国等での運用に則したフォーマットのリストを使用可能である。 The receivable station acquisition unit 3 acquires information on broadcast stations that can receive digital broadcast waves from the reception signal of the reception unit 1, and generates and manages a list and the like. Hereinafter, a broadcast station that can receive digital broadcast waves is called a receivable station, and a list that manages information on receivable stations is called a receivable station list. The receivable station includes an emergency alert signal transmission broadcast station that transmits an emergency alert signal superimposed on a digital broadcast wave. In the receivable station list, for example, information such as a channel (frequency) of a receivable station, a broadcast station name, a service name, a broadcast station ID, a service ID, a region ID, and a reception status is described. Since the operation of digital broadcasting varies depending on the country or the like, a list of formats conforming to the operation in the country or the like using the digital broadcast receiving apparatus can be used.
　受信可能局取得部３は、例えば受信部１が定期的に行うチャネルサーチの都度、デジタル放送波の受信環境および受信状況に基づいて受信可否を判断し、受信可能と判断した放送局の情報を受信可能局リストに登録したり受信不可能と判断した放送局の情報を受信可能局リストから削除したりする。これにより、走行中の車両において、現在受信可能な放送局を把握可能である。受信環境は、受信電力、ＳＮＲ（Ｓｉｇｎａｌ　ｔｏ　Ｎｏｉｓｅ　Ｒａｔｉｏ）、またはＣＮＲ（Ｃａｒｒｉｅｒ　ｔｏ　Ｎｏｉｓｅ　Ｒａｔｉｏ）等により評価可能である。受信状況は、ＢＥＲ（Ｂｉｔ　Ｅｒｒｏｒ　Ｒａｔｉｏ）またはＰＥＲ（Ｐａｃｋｅｔ　Ｅｒｒｏｒ　Ｒａｔｉｏ）等におけるＥｒｒｏｒ包含率により評価可能である。 The receivable station acquisition unit 3 determines whether or not reception is possible based on the reception environment and reception status of a digital broadcast wave, for example, every time a channel search is performed periodically by the reception unit 1, and information on the broadcast station determined to be receivable It registers in the receivable station list or deletes information on broadcast stations that are determined to be unreceivable from the receivable station list. As a result, it is possible to grasp the currently receivable broadcasting stations in the traveling vehicle. The reception environment can be evaluated by received power, SNR (Signal to Noise Ratio), CNR (Carrier to Noise Ratio), or the like. The reception status can be evaluated based on the error coverage in BER (Bit Error Ratio) or PER (Packet Error Ratio).
　現在位置判定部４は、警報検出部２において緊急警報信号が検出された場合、受信可能局取得部３の受信可能局リストを参照してデジタル放送受信装置の現在位置を判定する。現在位置は、警報通知判定部５に入力される。現在位置判定部４の現在位置判定手順については後述する。 The current position determination unit 4 determines the current position of the digital broadcast receiving device with reference to the receivable station list of the receivable station acquisition unit 3 when an emergency warning signal is detected in the alarm detection unit 2. The current position is input to the alarm notification determination unit 5. The current position determination procedure of the current position determination unit 4 will be described later.
　警報通知判定部５は、警報検出部２において緊急警報信号が検出された場合、現在位置判定部４の現在位置が緊急警報信号の警報対象地域に含まれるか否かを判定する。警報通知判定部５は、現在位置が警報対象地域に含まれる場合に、警報通知部６に対して緊急警報信号の通知を指示する。緊急警報信号の警報対象地域を示す情報は、例えば、その緊急警報信号内に含まれている。 The alarm notification determination unit 5 determines whether or not the current position of the current position determination unit 4 is included in the alarm target area of the emergency alarm signal when the emergency detection signal is detected by the alarm detection unit 2. The warning notification determination unit 5 instructs the warning notification unit 6 to notify an emergency warning signal when the current position is included in the warning target area. The information indicating the warning target area of the emergency warning signal is included in the emergency warning signal, for example.
　警報通知部６は、警報通知判定部５から緊急警報信号の通知が指示された場合、警報検出部２の緊急警報信号をエンドユーザに通知する。緊急警報信号のエンドユーザへの通知方法は、ディスプレイ表示またはスピーカ出力等、任意の方法でよい。 The alarm notification unit 6 notifies the end user of the emergency alarm signal of the alarm detection unit 2 when the notification of the emergency alarm signal is instructed from the alarm notification determination unit 5. The notification method of the emergency warning signal to the end user may be any method such as display display or speaker output.
　図１では、デジタル放送受信装置を構成する各種機能のうち、緊急警報信号に関する機能を図示してある。図示は省略するが、このデジタル放送受信装置は、受信信号をエンコードして映像および音声の情報に変換し、ディスプレイおよびスピーカから出力する機能等を備えていてもよい。 FIG. 1 illustrates a function relating to an emergency warning signal among various functions constituting the digital broadcast receiving apparatus. Although not shown, this digital broadcast receiving apparatus may have a function of encoding a received signal, converting it into video and audio information, and outputting the information from a display and a speaker.
　次に、図２のフローチャートを用いて、現在位置判定部４の現在位置判定手順を説明する。現在位置判定部４は、受信信号に緊急警報信号が重畳していることを警報検出部２から通知された場合に、図２のフローチャートを実施する。 Next, the current position determination procedure of the current position determination unit 4 will be described using the flowchart of FIG. The current position determination unit 4 executes the flowchart of FIG. 2 when notified from the alarm detection unit 2 that an emergency alarm signal is superimposed on the received signal.
　現在位置判定部４は、まず、緊急警報信号送信放送局が送信するデジタル放送波の送信対象地域（以下、放送地域と呼ぶ）を示す放送局情報を取得可能か否かを判定する（ステップＳＴ１）。上記の例で言えば、放送局情報は、緊急警報信号送信放送局からの受信信号に含まれる地域ＩＤに相当する。 The current position determination unit 4 first determines whether or not it is possible to acquire broadcast station information indicating a transmission target area (hereinafter referred to as a broadcast area) of a digital broadcast wave transmitted by an emergency alert signal transmission broadcast station (step ST1). ). In the above example, the broadcast station information corresponds to the area ID included in the received signal from the emergency alert signal transmission broadcast station.
　緊急警報信号送信放送局を含む受信可能局の放送局情報は、デジタル放送受信装置を使用する国等におけるデジタル放送の運用に則したものを使用可能である。例えば、日本のデジタル放送の運用では、受信信号に含まれるＰＳＩ（Ｐｒｏｇｒａｍ　Ｓｐｅｃｉｆｉｃ　Ｉｎｆｏｒｍａｔｉｏｎ）データ中のＮＩＴ（Ｎｅｔｗｏｒｋ　Ｉｎｆｏｒｍａｔｉｏｎ　Ｔａｂｌｅ）に記述されている地上デジタル分配記述子のエリアコードから、放送地域を特定可能である。韓国および中国等のデジタル放送のように、ＮＩＴの地上デジタル分配記述子のエリアコードが運用されていない場合、エリアコードに代わる別の情報を使用可能である。例えば韓国であれば、Ｅｎｓｅｍｂｌｅ　ＩＤと呼ばれる放送局固有のＩＤの中にＲｅｇｉｏｎ　Ｃｏｄｅが送付されており、このＲｅｇｉｏｎ　Ｃｏｄｅから放送地域を特定可能である。 Broadcast station information of receivable stations including emergency alert signal transmission broadcast stations can be used in accordance with digital broadcast operations in countries where digital broadcast receivers are used. For example, in the operation of digital broadcasting in Japan, the broadcasting region can be specified from the area code of the terrestrial digital distribution descriptor described in NIT (Network Information Table) in the PSI (Program Specific Information) data included in the received signal. It is. When the area code of the terrestrial digital distribution descriptor of NIT is not operated as in digital broadcasting in Korea and China, other information in place of the area code can be used. For example, in Korea, a Region Code is sent in an ID unique to a broadcasting station called an Ensemble ID, and the broadcasting area can be specified from this Region Code.
　なお、現在位置判定部４は、緊急警報信号送信放送局の放送局情報を、受信可能局取得部３の受信可能局リストの中から取得してもよいし、受信部１で受信中の緊急警報信号送信放送局からの受信信号の中から取得してもよい。 The current position determination unit 4 may acquire the broadcast station information of the emergency alert signal transmission broadcast station from the list of receivable stations of the receivable station acquisition unit 3 or the emergency that is being received by the reception unit 1. You may acquire from the received signal from an alarm signal transmission broadcast station.
　緊急警報信号送信放送局の放送局情報を取得できた場合（ステップＳＴ１“ＹＥＳ”）、現在位置判定部４は、取得した緊急警報信号送信放送局の放送局情報が示す放送地域を、デジタル放送受信装置の現在位置とする（ステップＳＴ２）。上記の例で言えば、緊急警報信号送信放送局からの受信信号に含まれる地域ＩＤで特定される放送地域が、デジタル放送受信装置の現在位置になる。１個の放送局情報（例えば、上記の地域ＩＤ）から特定されるデジタル放送受信装置の現在位置を、「限定的な現在位置情報」と呼ぶ。これに対して、デジタル放送受信装置の現在位置が、複数個の放送局情報が示す複数の放送地域にわたる場合を「広範な現在位置情報」と呼ぶ。「広範な現在位置情報」の例は後述する。 When the broadcast station information of the emergency alert signal transmission broadcast station can be acquired (step ST1 “YES”), the current position determination unit 4 digitally broadcasts the broadcast area indicated by the broadcast station information of the acquired emergency alert signal transmission broadcast station. The current position of the receiving device is set (step ST2). In the above example, the broadcast area specified by the area ID included in the received signal from the emergency alert signal transmitting broadcast station is the current position of the digital broadcast receiving apparatus. The current position of the digital broadcast receiving device specified from one piece of broadcast station information (for example, the above-mentioned area ID) is referred to as “limited current position information”. On the other hand, a case where the current position of the digital broadcast receiving apparatus covers a plurality of broadcast areas indicated by a plurality of broadcast station information is referred to as “broad current position information”. An example of “broad current position information” will be described later.
　一方、緊急警報信号送信放送局の放送局情報を取得できなかった場合（ステップＳＴ１“ＮＯ”）、現在位置判定部４は、受信可能局取得部３の受信可能局リストを参照して、デジタル放送波を受信可能な放送局の有無を判定する（ステップＳＴ３）。 On the other hand, when the broadcast station information of the emergency alert signal transmission broadcast station cannot be acquired (step ST1 “NO”), the current position determination unit 4 refers to the receivable station list of the receivable station acquisition unit 3 and The presence / absence of a broadcast station capable of receiving broadcast waves is determined (step ST3).
　デジタル放送波を受信可能な放送局が受信可能局リストにある場合（ステップＳＴ３“ＹＥＳ”）、現在位置判定部４は、その受信可能局リストから受信可能な全ての放送局の放送局情報を取得する（ステップＳＴ４）。続いて現在位置判定部４は、受信可能な全ての放送局の放送局情報から、デジタル放送受信装置の現在位置を導出可能か否かを判定する（ステップＳＴ５）。なお、ステップＳＴ５での判定には、多数決判定等を用いる。 When a broadcast station capable of receiving a digital broadcast wave is in the receivable station list (step ST3 “YES”), the current position determination unit 4 obtains broadcast station information of all the receivable stations from the receivable station list. Obtain (step ST4). Subsequently, the current position determination unit 4 determines whether or not the current position of the digital broadcast receiving apparatus can be derived from the broadcast station information of all receivable broadcast stations (step ST5). For the determination in step ST5, majority determination or the like is used.
　受信可能な全ての放送局の放送局情報から現在位置を導出可能な場合（ステップＳＴ５“ＹＥＳ”）、現在位置判定部４は、それらの放送局情報（例えば、上記の地域ＩＤ）に基づき、デジタル放送受信装置の「限定的な現在位置情報」を導出する（ステップＳＴ６）。ステップＳＴ６では、多数決判定により、受信可能な全ての放送局の放送局情報のうちの最も数が多い放送局情報により特定される放送地域が、デジタル放送受信装置の現在位置（限定的な現在位置情報）になる。 When the current position can be derived from the broadcast station information of all receivable broadcast stations (step ST5 “YES”), the current position determination unit 4 is based on the broadcast station information (for example, the above-described area ID), “Limited current position information” of the digital broadcast receiving apparatus is derived (step ST6). In step ST6, the broadcasting area specified by the broadcasting station information having the largest number among the broadcasting station information of all the receivable broadcasting stations by the majority decision is determined as the current position (limited current position) of the digital broadcast receiving apparatus. Information).
　一方、受信可能な全ての放送局の放送局情報から現在位置を導出不可能な場合（ステップＳＴ５“ＮＯ”）、現在位置判定部４は、それらの放送局情報（例えば、上記の地域ＩＤ）に基づき、デジタル放送受信装置の「広範な現在位置情報」を導出する（ステップＳＴ７）。受信可能な全ての放送局の放送局情報から現在位置を導出不可能な場合とは、多数決判定により、最も数が多い放送局情報が複数あって１つの放送局情報に絞れない場合等である。この場合、ステップＳＴ７では、複数の最も数が多い放送局情報により特定される複数の放送地域が、デジタル放送受信装置の現在位置（広範な現在位置情報）になる。 On the other hand, when the current position cannot be derived from the broadcast station information of all receivable broadcast stations (step ST5 “NO”), the current position determination unit 4 determines the broadcast station information (for example, the above-described area ID). Based on the above, “broad current position information” of the digital broadcast receiving apparatus is derived (step ST7). The case where the current position cannot be derived from the broadcast station information of all receivable broadcast stations is the case where there is a plurality of broadcast station information having the largest number and it cannot be narrowed down to one broadcast station information by majority decision. . In this case, in step ST7, a plurality of broadcast areas specified by a plurality of the largest number of broadcast station information becomes the current position (broad current position information) of the digital broadcast receiver.
　以上の手順により導出された現在位置情報は、警報通知判定部５において警報対象地域に含まれるか否か判定される。警報通知判定部５は、デジタル放送受信装置の現在位置が警報対象地域に含まれる場合には警報通知部６へ緊急警報信号の通知を指示し、警報対象地域に含まれない場合には指示しない。
　これにより、放送局が緊急時のみでなく、包括的に緊急警報信号の送信を行った場合に、エンドユーザにとって真に必要でないと推測される緊急警報信号の通知を抑制する効果が得られる。
　また、エンドユーザに対する緊急警報信号の通知必要性の判定に使用するデジタル放送受信装置の現在位置の情報を、デジタル放送波を受信可能な放送局の放送局情報から導出するため、ＧＰＳ等の特別な測位手段が不要である。よって、安価でかつ小形なデジタル放送受信装置の製造を実現できる。 The current position information derived by the above procedure is determined by the alarm notification determination unit 5 as to whether or not it is included in the alarm target area. The warning notification determination unit 5 instructs the warning notification unit 6 to notify an emergency warning signal when the current position of the digital broadcast receiving device is included in the warning target region, and does not indicate when it is not included in the warning target region. .
Thereby, when the broadcast station transmits the emergency alert signal not only in an emergency but comprehensively, an effect of suppressing the notification of the emergency alert signal which is estimated to be not really necessary for the end user can be obtained.
Moreover, in order to derive the information on the current position of the digital broadcast receiver used for determining the necessity of notifying the end user of an emergency alert signal from the broadcast station information of a broadcast station capable of receiving a digital broadcast wave, a special GPS or the like No need for positioning means. Therefore, it is possible to realize an inexpensive and small-sized digital broadcast receiver.
　なお、デジタル放送波を受信可能な放送局が受信可能局リストにない場合（ステップＳＴ３“ＮＯ”）、現在位置判定部４は、デジタル放送受信装置の現在位置情報を導出できない（ステップＳＴ８）。この場合、現在位置判定部４から警報通知判定部５へ現在位置導出不可の通知を行い、警報通知判定部５は、現在位置による制限を実施せずに緊急警報信号を通知すると判定する。 If a broadcast station that can receive a digital broadcast wave is not in the list of receivable stations (step ST3 “NO”), the current position determination unit 4 cannot derive the current position information of the digital broadcast receiver (step ST8). In this case, the current position determination unit 4 notifies the alarm notification determination unit 5 that the current position cannot be derived, and the alarm notification determination unit 5 determines to notify the emergency alarm signal without performing the restriction based on the current position.
　ここで、具体例を説明する。
　図３は、受信可能局リストの一例であり、受信可能局の放送局名および地域ＩＤを抜粋して示す。受信可能局Ａ～Ｆのうち、放送局Ａが緊急警報信号送信放送局である。
　図３の場合、緊急警報信号送信放送局Ａの地域ＩＤが受信可能局リストにない（ステップＳＴ１“ＮＯ”）。従って、現在位置判定部４は、受信可能局リストから放送局Ｂ～Ｆの地域ＩＤを取得する（ステップＳＴ３“ＹＥＳ”およびステップＳＴ４）。現在位置判定部４は、放送局Ｂ～Ｆの地域ＩＤを用いて多数決判定するが、地域ＩＤ＝０ｘ０１と地域ＩＤ＝０ｘ０２が同数あるため現在位置を判定できない（ステップＳＴ５“ＮＯ”）。そのため、現在位置判定部４は、多数決判定で同率一位になった地域ＩＤ＝０ｘ０１と地域ＩＤ＝０ｘ０２の双方を、「広範な現在位置情報」とする（ステップＳＴ７）。 Here, a specific example will be described.
FIG. 3 is an example of a list of receivable stations, and shows the broadcast station names and area IDs of receivable stations. Among the receivable stations A to F, the broadcasting station A is an emergency warning signal transmission broadcasting station.
In the case of FIG. 3, the area ID of the emergency alert signal transmitting broadcast station A is not in the receivable station list (step ST1 “NO”). Therefore, the current position determination unit 4 acquires the area IDs of the broadcasting stations B to F from the receivable station list (step ST3 “YES” and step ST4). The current position determination unit 4 makes a majority decision using the area IDs of the broadcasting stations B to F, but cannot determine the current position because the area ID = 0x01 and the area ID = 0x02 are the same number (step ST5 “NO”). Therefore, the current position determination unit 4 sets both “region ID = 0x01” and “region ID = 0x02”, which are ranked first in the majority decision, as “broad current position information” (step ST7).
　図４は、受信可能局リストの別の例であり、受信可能局の放送局名および地域ＩＤを抜粋して示す。受信可能局Ａ～Ｆのうち、放送局Ａが緊急警報信号送信放送局である。
　図４の場合、現在位置判定部４は、放送局Ｂ～Ｆの地域ＩＤを用いて多数決判定し、地域ＩＤ＝０ｘ０２の数が最も多いため現在位置は０ｘ０２内である可能性が極めて高いと判断できる（ステップＳＴ５“ＹＥＳ”）。そのため、現在位置判定部４は、地域ＩＤ＝０ｘ０２を「限定的な現在位置情報」とする（ステップＳＴ６）。 FIG. 4 is another example of the receivable station list, and shows the broadcast station name and area ID of the receivable stations. Among the receivable stations A to F, the broadcasting station A is an emergency warning signal transmission broadcasting station.
In the case of FIG. 4, the current position determination unit 4 makes a majority decision using the area IDs of the broadcasting stations B to F, and since the number of area IDs = 0x02 is the largest, the current position is very likely to be within 0x02. This can be determined (step ST5 “YES”). Therefore, the current position determination unit 4 sets the area ID = 0x02 as “limited current position information” (step ST6).
　以上より、実施の形態１のデジタル放送受信装置によれば、緊急警報信号を送信している緊急警報信号送信放送局を含む、受信部１においてデジタル放送波を受信可能な１つ以上の放送局の放送地域を示す放送局情報を、当該デジタル放送波の中から取得する受信可能局取得部３と、警報検出部２により緊急警報信号が検出された場合に、受信可能局取得部３により取得された放送局情報を用いてデジタル放送受信装置の現在位置を判定する現在位置判定部４と、現在位置判定部４により判定されたデジタル放送受信装置の現在位置が緊急警報信号の警報対象地域に含まれるか否かを判定し、含まれる場合に緊急警報信号のユーザへの通知を警報通知部６に指示する警報通知判定部５とを備える構成にした。現在位置の判定を、受信可能な放送局の放送局情報のみで行えるため、ＧＰＳ等の特別な測位手段が不要となる。また、緊急警報信号送信放送局の放送局情報を受信できない場合であっても、緊急警報信号の警報対象地域に含まれているか否かを判定することができる。 As described above, according to the digital broadcast receiving apparatus of the first embodiment, one or more broadcast stations that can receive digital broadcast waves in the reception unit 1, including an emergency alert signal transmission broadcast station that transmits an emergency alert signal. Is acquired by the receivable station acquisition unit 3 when the emergency alarm signal is detected by the alarm detection unit 2 and the receivable station acquisition unit 3 that acquires the broadcast station information indicating the broadcasting area Current position determination unit 4 that determines the current position of the digital broadcast receiving device using the broadcast station information that has been made, and the current position of the digital broadcast reception device determined by the current position determination unit 4 is the warning target area of the emergency warning signal It was determined whether or not it is included, and when included, the alarm notification determination unit 5 that instructs the alarm notification unit 6 to notify the user of an emergency warning signal. Since the current position can be determined only from the broadcast station information of receivable broadcast stations, a special positioning means such as GPS becomes unnecessary. Moreover, even if it is a case where the broadcast station information of an emergency alert signal transmission broadcast station cannot be received, it can be determined whether it is included in the warning object area of an emergency alert signal.
　また、実施の形態１のデジタル放送受信装置によれば、現在位置判定部４は、受信可能局取得部３において緊急警報信号送信放送局のデジタル放送波から放送局情報を取得できる場合、当該放送局情報が示す放送地域をデジタル放送受信装置の現在位置と判定し、受信可能局取得部３において緊急警報信号送信放送局のデジタル放送波から放送局情報を取得できない場合、緊急警報信号送信放送局を除く、デジタル放送波を受信可能な１以上の放送局の放送局情報を多数決判定して、最も多い放送局情報が示す放送地域をデジタル放送受信装置の現在位置と判定する構成にした。このため、ＧＰＳ等の特別な測位手段を必要とせず、また緊急警報信号送信放送局の放送局情報を受信できない場合であっても、最も確からしい現在位置を特定して緊急警報信号の警報対象地域に含まれているか否かを判定することができる。 Also, according to the digital broadcast receiving apparatus of the first embodiment, the current position determination unit 4 can acquire the broadcast station information when the receivable station acquisition unit 3 can acquire the broadcast station information from the digital broadcast wave of the emergency alert signal transmission broadcast station. When the broadcast area indicated by the station information is determined as the current position of the digital broadcast receiver, and the receivable station acquisition unit 3 cannot acquire the broadcast station information from the digital broadcast wave of the emergency alarm signal transmission broadcast station, the emergency alert signal transmission broadcast station The broadcast station information of one or more broadcast stations that can receive digital broadcast waves is determined by majority decision, and the broadcast area indicated by the most broadcast station information is determined as the current position of the digital broadcast receiver. For this reason, no special positioning means such as GPS is required, and even if the broadcast station information of the emergency alert signal transmission broadcast station cannot be received, the most probable current position is identified and the alert target of the emergency alert signal It can be determined whether it is included in the area.
　また、実施の形態１のデジタル放送受信装置によれば、現在位置判定部４は、多数決判定した結果、最も多い放送局情報が複数あった場合、当該複数の放送局情報が示す複数の放送地域をデジタル放送受信装置の現在位置と判定する構成にした。このため、ＧＰＳ等の特別な測位手段を必要とせず、また緊急警報信号送信放送局の放送局情報を受信できずかつ多数決判定により最も確からしい現在位置を特定できない場合であっても、現在位置である可能性が高い範囲を特定して緊急警報信号の警報対象地域に含まれているか否かを判定することができる。 In addition, according to the digital broadcast receiving apparatus of the first embodiment, if the current position determination unit 4 determines that the majority of the broadcast station information is found as a result of majority decision, a plurality of broadcast regions indicated by the plurality of broadcast station information Is determined to be the current position of the digital broadcast receiver. Therefore, even if a special positioning means such as GPS is not required, the broadcast station information of the emergency alert signal transmission broadcast station cannot be received, and the most probable current position cannot be specified by majority decision, It is possible to determine a range that is highly likely to be and whether it is included in the warning target area of the emergency warning signal.
　上記実施の形態１では、デジタル放送受信装置が車両に搭載されている場合を示したが、車両のほか、人、鉄道、船舶または航空機等を含む移動体に搭載可能である。 In Embodiment 1 described above, the case where the digital broadcast receiving apparatus is mounted on a vehicle is shown, but it can be mounted on a mobile body including a person, a railroad, a ship, an aircraft, and the like in addition to the vehicle.
　ここで、上記実施の形態１の変形例を示す。
　例えば、警報通知判定部５は、警報検出部２により検出された緊急警報信号の緊急性が高いと判断した場合、現在位置判定部４による判定をスキップし、現在位置による制限を実施せずに緊急警報信号を通知するよう警報通知部６へ指示することが可能である。
　また例えば、現在位置判定部４は、緊急警報信号送信放送局の放送局情報の取得可否にかかわらず、緊急警報信号送信放送局を含むすべての受信可能局の放送局情報を多数決判定して、現在位置を判定することが可能である。
　また例えば、現在位置判定部４は、放送局情報の多数決判定により現在位置を判定するのではなく、放送局情報の同一数により現在位置を判定することも可能である。例えば「Ｎ以上の放送局にて同一である地域ＩＤ」を現在位置にする判定条件を設定した場合、Ｎ＝２とすると、図４の例では０ｘ０１と０ｘ０２が現在位置になる。 Here, the modification of the said Embodiment 1 is shown.
For example, when the alarm notification determination unit 5 determines that the emergency alarm signal detected by the alarm detection unit 2 is highly urgent, the determination by the current position determination unit 4 is skipped and the restriction based on the current position is not performed. It is possible to instruct the alarm notification unit 6 to notify an emergency alarm signal.
Also, for example, the current position determination unit 4 makes a majority decision on the broadcast station information of all receivable stations including the emergency alert signal transmission broadcast station regardless of whether the broadcast station information of the emergency alert signal transmission broadcast station can be acquired, It is possible to determine the current position.
Further, for example, the current position determination unit 4 can determine the current position based on the same number of broadcast station information, instead of determining the current position based on the majority decision of the broadcast station information. For example, when a determination condition for setting the current region to “area ID that is the same in N or more broadcasting stations” is set, if N = 2, 0x01 and 0x02 are the current positions in the example of FIG.
　上記以外にも、本発明はその発明の範囲内において、実施の形態の任意の構成要素の変形、または実施の形態の任意の構成要素の省略が可能である。 In addition to the above, within the scope of the invention, the present invention can be modified with any component of the embodiment or omitted with any component.
　この発明に係るデジタル放送受信装置は、デジタル放送波を受信可能な放送局の放送局情報を用いて現在位置を判定するようにしたので、移動体用のデジタル放送受信装置等に用いるのに適している。 Since the digital broadcast receiving apparatus according to the present invention determines the current position using the broadcast station information of a broadcast station capable of receiving a digital broadcast wave, it is suitable for use in a digital broadcast receiving apparatus for a mobile object. ing.
　１　受信部、２　警報検出部、３　受信可能局取得部、４　現在位置判定部、５　警報通知判定部、６　警報通知部。 1 reception unit, 2 alarm detection unit, 3 receivable station acquisition unit, 4 current position determination unit, 5 alarm notification determination unit, 6 alarm notification unit.

Claims (3)

  1. 　デジタル放送波を受信する受信部と、
    　前記受信部により受信したデジタル放送波に重畳された緊急警報信号を検出する警報検出部と、
    　前記緊急警報信号をユーザに通知する警報通知部とを備えるデジタル放送受信装置であって、
    　前記緊急警報信号を送信している緊急警報信号送信放送局を含む、前記受信部においてデジタル放送波を受信可能な１つ以上の放送局の放送地域を示す放送局情報を、当該デジタル放送波の中から取得する受信可能局取得部と、
    　前記警報検出部により前記緊急警報信号が検出された場合に、前記受信可能局取得部により取得された前記放送局情報を用いて前記デジタル放送受信装置の現在位置を判定する現在位置判定部と、
    　前記現在位置判定部により判定された前記デジタル放送受信装置の現在位置が前記緊急警報信号の警報対象地域に含まれるか否かを判定し、含まれる場合に前記緊急警報信号のユーザへの通知を前記警報通知部に指示する警報通知判定部とを備えることを特徴とするデジタル放送受信装置。     A receiver for receiving digital broadcast waves;
    An alarm detector for detecting an emergency alarm signal superimposed on the digital broadcast wave received by the receiver;
    A digital broadcast receiver comprising an alarm notification unit for notifying a user of the emergency alarm signal,
    Broadcast station information indicating a broadcast area of one or more broadcast stations capable of receiving a digital broadcast wave in the receiving unit, including an emergency alert signal transmission broadcast station transmitting the emergency alert signal, of the digital broadcast wave A receivable station acquisition unit acquired from inside,
    A current position determination unit that determines a current position of the digital broadcast receiver using the broadcast station information acquired by the receivable station acquisition unit when the emergency alarm signal is detected by the alarm detection unit;
    It is determined whether or not the current position of the digital broadcast receiving device determined by the current position determination unit is included in the warning target area of the emergency warning signal, and if included, the user is notified of the emergency warning signal. A digital broadcast receiving apparatus comprising: an alarm notification determination unit that instructs the alarm notification unit.
  2. 　前記現在位置判定部は、
    　前記受信可能局取得部において前記緊急警報信号送信放送局のデジタル放送波から放送局情報を取得できる場合、当該放送局情報が示す放送地域を前記デジタル放送受信装置の現在位置と判定し、
    　前記受信可能局取得部において前記緊急警報信号送信放送局のデジタル放送波から放送局情報を取得できない場合、前記緊急警報信号送信放送局を除く、デジタル放送波を受信可能な１つ以上の放送局の放送局情報を多数決判定して、最も多い放送局情報が示す放送地域を前記デジタル放送受信装置の現在位置と判定することを特徴とする請求項１記載のデジタル放送受信装置。     The current position determination unit
    When the broadcast station information can be acquired from the digital broadcast wave of the emergency alert signal transmission broadcast station in the receivable station acquisition unit, the broadcast area indicated by the broadcast station information is determined as the current position of the digital broadcast receiver,
    One or more broadcast stations other than the emergency alert signal transmission broadcast station that can receive the digital broadcast wave when the receivable station acquisition unit cannot acquire broadcast station information from the digital broadcast wave of the emergency alert signal transmission broadcast station. 2. The digital broadcast receiving apparatus according to claim 1, wherein the majority of the broadcast station information is determined and the broadcast area indicated by the most broadcast station information is determined as the current position of the digital broadcast receiving apparatus.
  3. 　前記現在位置判定部は、多数決判定した結果、最も多い放送局情報が複数あった場合、当該複数の放送局情報が示す複数の放送地域を前記デジタル放送受信装置の現在位置と判定することを特徴とする請求項２記載のデジタル放送受信装置。 The current position determination unit determines a plurality of broadcast areas indicated by the plurality of broadcast station information as the current position of the digital broadcast receiving device when there is a plurality of broadcast station information having the largest number as a result of majority decision. The digital broadcast receiver according to claim 2.
PCT/JP2014/079607 2014-11-07 2014-11-07 Digital broadcast receiver WO2016072020A1 (en)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2006333180A (en) * 2005-05-27 2006-12-07 Kenwood Corp Present area detector, digital television broadcast receiver for mobile unit and method and program for receiving digital television broadcast for mobile unit
JP2010035085A (en) * 2008-07-31 2010-02-12 Sanyo Electric Co Ltd Digital broadcast receiver
JP2010154447A (en) * 2008-12-26 2010-07-08 Mitsubishi Electric Corp Digital broadcast receiver
JP2011023816A (en) * 2009-07-13 2011-02-03 Canon Inc Broadcast receiver and control method of the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006333180A (en) * 2005-05-27 2006-12-07 Kenwood Corp Present area detector, digital television broadcast receiver for mobile unit and method and program for receiving digital television broadcast for mobile unit
JP2010035085A (en) * 2008-07-31 2010-02-12 Sanyo Electric Co Ltd Digital broadcast receiver
JP2010154447A (en) * 2008-12-26 2010-07-08 Mitsubishi Electric Corp Digital broadcast receiver
JP2011023816A (en) * 2009-07-13 2011-02-03 Canon Inc Broadcast receiver and control method of the same

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