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JP2004253829A - Broadcast receiver and broadcast receiving method - Google Patents

Broadcast receiver and broadcast receiving method Download PDF

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Publication number
JP2004253829A
JP2004253829A JP2003038897A JP2003038897A JP2004253829A JP 2004253829 A JP2004253829 A JP 2004253829A JP 2003038897 A JP2003038897 A JP 2003038897A JP 2003038897 A JP2003038897 A JP 2003038897A JP 2004253829 A JP2004253829 A JP 2004253829A
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Japan
Prior art keywords
service
broadcast
desired service
configuration information
information
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JP2003038897A
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Japanese (ja)
Inventor
Tetsuya Nakamura
哲也 中村
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Kenwood KK
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Kenwood KK
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Priority to JP2003038897A priority Critical patent/JP2004253829A/en
Priority to EP04002228A priority patent/EP1447929A1/en
Priority to DE2004002228 priority patent/DE04002228T1/en
Publication of JP2004253829A publication Critical patent/JP2004253829A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/40—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H04H60/44—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiver capable of quickly searching a desired service. <P>SOLUTION: When a control section of the broadcast receiver checks service configuration information in a DAB broadcast signal received by a DAB (digital audio broadcast) reception section for searching a service, the control section also references the service configuration information after a configuration change denoted by predictive information when the predictive information exists as well as the service configuration information as to a service at present to check whether or not a desired service exists, and when the service configuration information as to the service includes no desired service but the predictive information includes the desired service, the control section makes the broadcast receiver output the desired service after awaiting a configuration change. As a result, an overlooking at the time of checking the service configuration information in the DAB broadcast signal, when only the service configuration information as to the service broadcast at present is referred to and the desired service is started in the DAB broadcast just after the referencing, can be avoided. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、放送受信装置、放送受信方法に係り、とくに例えばＤＡＢ（Ｄｉｇｉｔａｌ Ａｕｄｉｏ Ｂｒｏａｄｃａｓｔ ）のような一つの搬送周波数に複数のサービス（音声番組、天候・交通等の情報番組）が多重化された多重化放送を受信する放送受信装置、放送受信方法に関する。
【０００２】
【従来の技術】
移動体に高音質のラジオ番組を提供するＤＡＢが欧州で実用化されている。ＤＡＢは、多数の音声番組や天候情報または交通情報を随時受信できる利点がある。
現在のＤＡＢの各放送チャンネルは、テレビジョン放送の各チャンネルに割り当てられた受信周波数間の空き周波数が利用されている。各放送チャンネルに対応した搬送周波数群をアンサンブルといい、各アンサンブルには複数のサービスが多重化されている。１つのアンサンブルよる多重化放送は図４に示す如くＤＡＢ伝送フレームにより構成されており、この内、ＭＳＣ（Ｍａｉｎ Ｉｎｆｏｒｍａｔｉｏｎ Ｃｈａｎｎｅｌ；メイン情報チャンネル）には各サービスの実体データが含まれており、ＦＩＣ（Ｆｉｒｓｔ Ｉｎｆｏｒｍａｔｉｏｎ Ｃｈａｎｎｅｌ ；ファースト情報チャンネル）にはアンサンブル識別情報、放送に含まれるサービスの構成を示すサービス構成情報等のＤＡＢ放送管理情報が含まれている。
【０００３】
ところで、ＤＡＢでは放送の途中で任意にサービスの構成（サービス数、音声のビットレート）を変化させることが許されており、これをＭＲＣ（Ｍｕｌｔｉ Ｒｅ−Ｃｏｎｆｉｇｕｒａｔｉｏｎ；多重化再構成）と呼ぶ。ＭＲＣ機能を図５を参照して説明すると、現在放送中のサービス構成がサービスＡ、Ｂ、Ｃであり、ｔＳ のタイミングでサービスＡ、Ｂ、Ｃの構成に変化する場合を考える。サービス構成情報は構成変化が起きる６秒のタイミングｔＰ より以前であれば現在放送中のサービスＡ，Ｂ，Ｄについての構成情報だけである。ｔＰ のタイミングになると現在放送中のサービスのサービス構成情報に加えて、構成変化後のサービスＡ，Ｂ，Ｄの構成情報を予告する予告情報と、構成変化までの時間情報が合わせて送信される。そして、構成変化が起きたあとは、予告情報はなくなり再び現在放送中のサービスＡ，Ｂ，Ｄについてのサービス構成情報だけとなる。このようなＭＲＣの機能の詳細は特開平１１−６８５９７号公報に記載されている。
【０００４】
図６にＤＡＢ放送受信装置の一般的な構成を示す。１はアンテナ、２はＤＡＢ受信部であり、可変の受信周波数によりＤＡＢ放送帯の内の任意の１つのアンサンブルに同調してＤＡＢ放送信号（多重化放送信号）を受信し、ＦＩＣに含まれるＤＡＢ放送管理情報（サービス構成情報等）を解読して出力したり、ユーザ所望の音楽番組の音声を再生出力したり、ユーザ所望の天候情報または交通情報を抽出して出力したりする。３は選択されたサービスに関する情報や天候情報または交通情報等を表示する表示部、４は操作部であり、所望サービスの選択操作をする。５はコントロール部であり、操作部４で所望サービスが選択されると、各部を制御してユーザ所望のサービスに係る音声、天候情報または交通情報を出力させる。
【０００５】
図７はコントロール部５による従来のサービス検索処理を示すフローチャートであり、操作部４で所望サービスが選択されると、コントロール部５はＤＡＢ受信部２を制御しまず所定のＤＡＢ帯域内の一番周波数の低い最初のアンサンブルの周波数に同調させる（ステップＳ１０、Ｓ１１）。そして、ＤＡＢ受信部２でＤＡＢ放送信号が受信できたかチェックする（ステップＳ１２）。できなければＤＡＢ帯域内の一番周波数の高いアンサンブルまで検索したかチェックし（ステップＳ１３）、ここではＮＯなので周波数が１段高い次のアンサンブルの周波数に同調させる（ステップＳ１４、Ｓ１１）。そして、ＤＡＢ受信部２でＤＡＢ放送信号が受信できたかチェックする（ステップＳ１２）。今度はできた場合、ＤＡＢ受信部２でＤＡＢ放送管理情報が解読されるのを待ち（ステップＳ１５）、解読されたら入力して現在放送中のサービスについてのサービス構成情報を参照して所望サービスが現在放送中かチェックする（ステップＳ１６）。ＮＯであれば再びＤＡＢ受信部２を制御し周波数が１段高いチャンネルに係る１つのアンサンブルの周波数に同調させるが（ステップＳ１３、Ｓ１４、Ｓ１１）、ステップＳ１６でＹＥＳであればＤＡＢ受信部２に指示して所望サービスが音声番組であれば所望番組の音声を再生して出力させ、所望サービスが天候情報または交通情報であれば、所望情報を抽出させて入力し、表示部３に該所望情報を表示させる（ステップＳ１７）。これにより、ユーザ所望のサービスを出力することができる。
【０００６】
【発明が解決しようとする課題】
ところで、操作部４で選択された所望サービスＤの検索途中に或るＤＡＢ放送を受信し、所望サービスが現在放送中かチェックした際（ステップＳ１６）、該ＤＡＢ放送で所望サービスＤの放送が開始する直前３秒前であったとき（図５のｔｘ 参照）、現在放送中のサービスはＡ、Ｂ、ＣだけありＮＯとなってしまうので、次のアンサンブルの受信に移行してしまう。このため、所望サービスの検索ミスを侵してしまい、ＤＡＢ帯域の一番高い周波数のアンサンブルまで検索したあと、再びＤＡＢ帯域の一番低い周波数のアンサンブルに戻って検索し直すので、所望サービスの検索が終わるまでに長い時間待たされてしまうという問題があった。
本発明は上記した問題に鑑み、所望サービスの検索を迅速にできる放送受信装置、放送受信方法を提供することを、その目的としている。
【０００７】
【課題を解決するための手段】
請求項１記載の放送受信装置では、一つの搬送周波数に複数のサービスが多重化された多重化放送を受信し、所望のサービスの音声または情報を出力したり、サービス構成情報を抽出して出力したりする受信手段を備えた放送受信装置において、検索対象の所望のサービスを選択する選択手段と、受信手段が出力したサービス構成情報の中にあらたなサービス構成に変化する予告情報があるか否か判別する判別手段と、選択手段で所望サービスが選択されると、受信手段を制御して所定の帯域内に存在する複数の多重化放送に順に同調させ、受信手段が或る多重化放送を受信すると、その多重化放送から受信されたサービス構成情報をチェックし、現在放送中のサービス構成情報の中に所望のサービスがあれば当該或る多重化放送への同調を継続させて所望サービスを再生出力させ、現在放送中のサービス構成情報の中に所望のサービスが無く予告情報もなければ次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無く予告情報はあるが予告情報の中にも所望サービスが無いとき次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無いが予告情報が有りかつ予告情報の中に所望サービスが有るとき、当該或る多重化放送への同調を継続させ所望サービスの放送が始まるのを待って所望サービスを再生させるサービス検索制御手段と、を備えたことを特徴としている。
【０００８】
請求項２記載の放送受信方法では、一つの搬送周波数に複数のサービスが多重化された多重化放送を受信し、所望のサービスを再生したり、サービス構成情報を抽出して出力したりする受信手段を備えた放送受信装置において、所望サービスが選択されると、受信手段を制御して所定の帯域内に存在する複数の多重化放送に順に同調させ、受信手段が或る多重化放送を受信すると、その多重化放送から受信されたサービス構成情報をチェックし、現在放送中のサービス構成情報の中に所望のサービスがあれば当該或る多重化放送への同調を継続させて所望サービスを再生出力させ、現在放送中のサービス構成情報の中に所望のサービスが無く予告情報もなければ次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無く予告情報はあるが予告情報の中にも所望サービスが無いとき次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無いが予告情報が有りかつ予告情報の中に所望サービスが有るとき、当該或る多重化放送への同調を継続させ所望サービスの放送が始まるのを待って所望サービスを再生させるようにしたこと、を特徴としている。
【０００９】
【発明の実施の形態】
図１は本発明の実施の形態に係るＤＡＢ放送受信装置の構成を示すブロック図であり、図６と同一の構成部分には同一の符号が付してある。
図１において、２はＤＡＢ受信部であり、可変の受信周波数によりＤＡＢ放送帯の内の任意の１つのアンサンブルに同調してＤＡＢ放送信号（多重化放送信号）を受信し、ＦＩＣに含まれるＤＡＢ放送管理情報（サービス構成情報等）を解読して出力したり、ユーザ所望の音楽番組の音声を再生出力したり、ユーザ所望の天候情報または交通情報を抽出して出力したりする。３は選択されたサービスに関する情報や天候情報または交通情報等を表示する表示部、４は操作部であり、所望サービスの選択操作をする。５Ａはコントロール部であり、操作部４で所望サービスが選択されると、各部を制御してユーザ所望のサービスに係る音声、天候情報または交通情報を出力させる。
【００１０】
コントロール部５Ａはサービス検索するためにＤＡＢ受信部２で受信されたサービス構成情報をチェックする際、現在放送中のサービスについてのサービス構成情報だけでなく、予告情報が存在する場合は予告情報の示す構成変化後のサービス構成情報も参照して所望サービスが存在するかチェックする。そして、所望サービスが現在放送中のサービスについてのサービス構成情報には無いが、予告情報には存在したとき、構成変化を待って所望サービスを出力させる。
その他の構成部分は図６と全く同一に構成されている。
【００１１】
図２はコントロール部５Ａによるサービス検索処理を示すフローチャート、図３はサービス検索処理の説明図であり、以下、これらの図を参照して上記した実施の形態の動作を説明する。
操作部４で所望サービス、たとえばサービスＤが選択されると、コントロール部５はＤＡＢ受信部２を制御しまず所定のＤＡＢ帯域内の一番周波数の低い最初のアンサンブルの周波数に同調させる（ステップＳ１０、Ｓ１１）。そして、ＤＡＢ受信部２でＤＡＢ放送信号が受信できたかチェックする（ステップＳ１２）。できなければＤＡＢ帯域内の一番周波数の高いアンサンブルまで検索したかチェックし（ステップＳ１３）、ここではＮＯなのでＤＡＢ受信部２を制御し周波数が１段高い次のアンサンブルに同調させる（ステップＳ１４、Ｓ１１）。そして、再びＤＡＢ受信部２でＤＡＢ放送信号が受信できたかチェックする（ステップＳ１２）。今度はできた場合、ＤＡＢ受信部２でＤＡＢ放送管理情報が解読されるのを待ち（ステップＳ１５）、解読されたら入力してまず現在放送中のサービスについてのサービス構成情報を参照して所望サービスが現在放送中かチェックする（ステップＳ１６）。このとき２番目のアンサンブルでは図３（１）の如く、現在サービスＥ、Ｆ、Ｇが放送中であり、その後暫く構成変化がないとする。ステップ１６での判断がｔ１ のタイミングであったとすると、ステップＳ１６でＮＯと判断する。このとき続いてＤＡＢ放送管理情報にサービス構成変化の予告情報が存在するかチェックする（ステップＳ１８）。ここでもＮＯとなるので、ＤＡＢ受信部２を制御し周波数が１段高い次のアンサンブルに同調させる（ステップＳ１３、Ｓ１４、Ｓ１１）。
【００１２】
そして、再びＤＡＢ受信部２でＤＡＢ放送信号が受信できたかチェックする（ステップＳ１２）。今度もできた場合、ＤＡＢ受信部２でＤＡＢ放送管理情報が解読されるのを待ち（ステップＳ１５）、解読されたら入力してまず現在放送中のサービスについてのサービス構成情報を参照して所望サービスが現在放送中かチェックする（ステップＳ１６）。このとき３番目のアンサンブルでは図３（２）の如く、現在サービスＨ、Ｉ、Ｊが放送中であるが、サービスＨ、Ｉ、Ｄへ構成変化する直前であり、予告情報と構成変化までの時間情報も合わせて放送されている最中であったとする。ステップ１６での判断がｔｘ のタイミングであったとすると、ステップＳ１６でＮＯと判断する。このとき続いてＤＡＢ放送管理情報にサービス構成変化の予告情報が存在するかチェックする（ステップＳ１８）。今度はＹＥＳとなるので、予告情報の示す構成変化後のサービス構成の中に所望サービスが存在するかチェックする（ステップＳ１９）。ＮＯであれば、再びＤＡＢ受信部２を制御し周波数が１段高いチャンネルに係る１つのアンサンブルの周波数に同調させるが（ステップＳ１３、Ｓ１４、Ｓ１１）、ここではステップＳ１９でＹＥＳとなる。このとき、ＤＡＢ受信部２からの新たなＤＡＢ放送管理情報の入力と構成変化までの残り時間が零になったかのチェックを繰り返し、構成変化が起きた時点（図３（２）のｔＳ 参照）でステップＳ２０でＹＥＳと判断し、ＤＡＢ受信部２に指示して所望サービスが音声番組であれば所望番組の音声を再生して出力させ、所望サービスが天候情報または交通情報であれば、所望情報を抽出させて入力し、表示部３に該所望情報を表示させる（ステップＳ１７）。これにより、ユーザ所望のサービスを迅速に出力させることができる。
【００１３】
この実施の形態によれば、コントロール部５Ａはサービス検索するためにＤＡＢ受信部２で受信されたＤＡＢ放送信号中のサービス構成情報をチェックする際、現在放送中のサービスについてのサービス構成情報だけでなく、予告情報が存在する場合は予告情報の示す構成変化後のサービス構成情報も参照して所望サービスが存在するかチェックする。そして、所望サービスが現在放送中のサービスについてのサービス構成情報には無いが、予告情報には存在したとき、構成変化を待って所望サービスを出力させる。この結果、ＤＡＢ放送信号中のサービス構成情報をチェックする際、現在放送中のサービスについてのサービス構成情報だけ参照していた場合には、直後に当該ＤＡＢ放送で所望サービスが始まる場合に見逃してしまっていたが、そのようなミスがなくなり速やかに所望サービスの検索を完了できる。
【００１４】
なお、上記した実施の形態では欧州で実用化されているＤＡＢ放送を受信対象とする場合を例に挙げて説明したが、本発明は何らこれに限定されるものでなく、他の種類の多重放送を受信対象とする場合にも同様に適用できるのは当然である。
【００１５】
【発明の効果】
この発明によれば、所望サービス検索のために多重放送中のサービス構成情報をチェックする際、現在放送中のサービスについてのサービス構成情報だけでなく構成変化が起きる前に送信される予告情報も合わせてチェックするので、検索ミスがなくなり速やかに所望サービスの検索を完了できる。
【図面の簡単な説明】
【図１】本発明の一つの実施の形態を示すＤＡＢ放送受信装置の構成を示すブロック図である。
【図２】図１中のコントロール部のサービス検索処理を示すフローチャートである。
【図３】図１のＤＡＢ放送受信装置によるサービス検索動作の説明図である。
【図４】ＤＡＢ伝送フレームの説明図である。
【図５】ＤＡＢ放送におけるサービス再構成機能の説明図である。
【図６】従来の一般的なＤＡＢ放送受信装置の構成を示すブロック図である。
【図７】図６中のコントロール部のサービス検索処理を示すフローチャートである。
【符号の説明】
２ ＤＡＢ受信部 ３ 表示部
４ 操作部 ５Ａ コントロール部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a broadcast receiving apparatus and a broadcast receiving method, and in particular, a plurality of services (audio programs, information programs such as weather / traffic, etc.) are multiplexed on one carrier frequency such as DAB (Digital Audio Broadcast). The present invention relates to a broadcast receiving device and a broadcast receiving method for receiving a multiplex broadcast.
[0002]
[Prior art]
DAB, which provides mobile stations with high-quality radio programs, has been put to practical use in Europe. DAB has the advantage that it can receive a large number of audio programs, weather information or traffic information at any time.
For each broadcasting channel of the current DAB, an empty frequency between reception frequencies allocated to each channel of television broadcasting is used. A carrier frequency group corresponding to each broadcast channel is called an ensemble, and a plurality of services are multiplexed in each ensemble. A multiplexed broadcast by one ensemble is composed of DAB transmission frames as shown in FIG. 4. Among them, an MSC (Main Information Channel) includes entity data of each service, and an FIC (Main Information Channel). First Information Channel (First Information Channel) includes ensemble identification information and DAB broadcast management information such as service configuration information indicating a configuration of a service included in the broadcast.
[0003]
By the way, the DAB is allowed to arbitrarily change the service configuration (the number of services and the audio bit rate) during the broadcast, and this is called MRC (Multi Re-Configuration; multiplex reconfiguration). When the MRC function will be described with reference to FIG. 5, the service configuration service A currently being broadcast, B, it is C, considered service A at timing t S, B, and vary the configuration of the C. Service configuration information services A currently being broadcast, if earlier than the timing t P 6 seconds configuration change occurs, B, only the configuration information about the D. In addition to the service of the service configuration information now on air becomes the timing of t P, Service A after configuration change, B, and notice information that notified the configuration information and D, are transmitted together the time information to configuration changes You. Then, after the configuration change occurs, there is no notice information, and only the service configuration information on the currently broadcast services A, B, and D is returned. The details of such a function of the MRC are described in JP-A-11-68597.
[0004]
FIG. 6 shows a general configuration of a DAB broadcast receiving apparatus. Reference numeral 1 denotes an antenna, and 2 denotes a DAB receiving unit, which receives a DAB broadcast signal (multiplexed broadcast signal) by tuning to an arbitrary ensemble in a DAB broadcast band at a variable reception frequency and receives a DAB included in the FIC. It decodes and outputs broadcast management information (service configuration information and the like), reproduces and outputs audio of a music program desired by the user, and extracts and outputs weather information or traffic information desired by the user. Reference numeral 3 denotes a display unit for displaying information on the selected service, weather information, traffic information, and the like. Reference numeral 4 denotes an operation unit for selecting a desired service. When a desired service is selected by the operation unit 4, a control unit 5 controls each unit to output voice, weather information, or traffic information relating to a service desired by the user.
[0005]
FIG. 7 is a flowchart showing a conventional service search process by the control unit 5. When a desired service is selected by the operation unit 4, the control unit 5 controls the DAB receiving unit 2 and firstly controls the DAB receiving unit 2 in the predetermined DAB band. The first ensemble having the lower frequency is tuned to the frequency (steps S10 and S11). Then, it is checked whether the DAB receiving section 2 has received the DAB broadcast signal (step S12). If not, it is checked whether or not the ensemble with the highest frequency in the DAB band has been searched (step S13). Since it is NO in this case, the frequency is tuned to the frequency of the next ensemble whose frequency is one step higher (steps S14 and S11). Then, it is checked whether the DAB receiving section 2 has received the DAB broadcast signal (step S12). If it can be done this time, it waits for the DAB receiving unit 2 to decode the DAB broadcast management information (step S15), and when it is decoded, inputs it and refers to the service configuration information of the currently broadcasted service to determine the desired service. It is checked whether it is currently being broadcast (step S16). If NO, the DAB receiver 2 is controlled again to tune to the frequency of one ensemble related to the channel whose frequency is one step higher (steps S13, S14, S11), but if YES in step S16, the DAB receiver 2 If the desired service is an audio program, the sound of the desired program is reproduced and output. If the desired service is weather information or traffic information, the desired information is extracted and input. Is displayed (step S17). As a result, a service desired by the user can be output.
[0006]
[Problems to be solved by the invention]
Meanwhile, when a certain DAB broadcast is received during the search for the desired service D selected by the operation unit 4 and it is checked whether the desired service is currently being broadcast (step S16), the broadcast of the desired service D is started by the DAB broadcast. when was just before 3 seconds before (see t x in FIG. 5), the service currently being broadcast a, B, because becomes C only there NO, resulting in transition to the reception of the next ensemble. For this reason, the search error of the desired service is violated, and after searching for the ensemble of the highest frequency in the DAB band, the search is performed again by returning to the ensemble of the lowest frequency in the DAB band. There was a problem that they had to wait for a long time to finish.
The present invention has been made in view of the above problems, and has as its object to provide a broadcast receiving apparatus and a broadcast receiving method that can quickly search for a desired service.
[0007]
[Means for Solving the Problems]
In the broadcast receiving apparatus according to the first aspect, a multiplex broadcast in which a plurality of services are multiplexed on one carrier frequency is received, and voice or information of a desired service is output, or service configuration information is extracted and output. And a selection unit for selecting a desired service to be searched, and whether there is advance notice information that changes to a new service configuration in the service configuration information output by the reception unit. When the desired service is selected by the determination unit and the selection unit, the reception unit is controlled to sequentially tune to a plurality of multiplexed broadcasts existing within a predetermined band, and the reception unit performs a certain multiplexed broadcast. Upon reception, the service configuration information received from the multiplex broadcast is checked, and if a desired service is present in the service configuration information currently being broadcast, tuning to the certain multiplex broadcast is performed. Then, the desired service is reproduced and output. If there is no desired service in the service configuration information currently being broadcast and there is no notice information, it is tuned to the next multiplexed broadcast, and the desired configuration is included in the service configuration information currently being broadcast. If there is no service and there is advance information but there is no desired service in advance information, it is tuned to the next multiplexed broadcast, and there is no desired service in the service configuration information currently being broadcast, but advance information exists and Service search control means for, when the desired service is included in the advance notice information, continuing to tune to the certain multiplexed broadcast and waiting for the start of the broadcast of the desired service to reproduce the desired service; And
[0008]
In the broadcast receiving method according to the second aspect, receiving a multiplexed broadcast in which a plurality of services are multiplexed on one carrier frequency, reproducing a desired service, and extracting and outputting service configuration information. When a desired service is selected in a broadcast receiving apparatus provided with means, the receiving means is controlled to sequentially tune to a plurality of multiplexed broadcasts existing within a predetermined band, and the receiving means receives a multiplexed broadcast. Then, the service configuration information received from the multiplex broadcast is checked, and if there is a desired service in the service configuration information currently being broadcast, tuning to the multiplex broadcast is continued to reproduce the desired service. If there is no desired service in the service configuration information currently being broadcast and there is no notice information, it is tuned to the next multiplexed broadcast, and the desired service is included in the service configuration information currently being broadcast. If there is no notice information but there is no desired service in the notice information, it is tuned to the next multiplexed broadcast, and there is no desired service in the service configuration information currently being broadcast, but there is notice information and notice information When there is a desired service, the tuning to the certain multiplexed broadcast is continued, and the desired service is reproduced after the start of the broadcasting of the desired service.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram showing a configuration of a DAB broadcast receiving apparatus according to an embodiment of the present invention, and the same components as those in FIG. 6 are denoted by the same reference numerals.
In FIG. 1, reference numeral 2 denotes a DAB receiving unit which receives a DAB broadcast signal (multiplexed broadcast signal) in synchronization with an arbitrary ensemble in a DAB broadcast band at a variable reception frequency, and receives a DAB included in the FIC. It decodes and outputs broadcast management information (service configuration information and the like), reproduces and outputs audio of a music program desired by the user, and extracts and outputs weather information or traffic information desired by the user. Reference numeral 3 denotes a display unit for displaying information on the selected service, weather information, traffic information, and the like. Reference numeral 4 denotes an operation unit for selecting a desired service. When a desired service is selected by the operation unit 4, a control unit 5 </ b> A controls each unit to output voice, weather information, or traffic information relating to a service desired by the user.
[0010]
When the control unit 5A checks the service configuration information received by the DAB reception unit 2 to search for a service, the control unit 5A indicates not only the service configuration information on the currently broadcasted service but also the advance notice information if there is advance notice information. It is checked whether a desired service exists by referring to the service configuration information after the configuration change. Then, when the desired service is not present in the service configuration information of the service currently being broadcast, but is present in the notice information, the desired service is output after waiting for a configuration change.
The other components are configured exactly the same as in FIG.
[0011]
FIG. 2 is a flowchart showing a service search process by the control unit 5A, and FIG. 3 is an explanatory diagram of the service search process. Hereinafter, the operation of the above-described embodiment will be described with reference to these drawings.
When a desired service, for example, service D, is selected by the operation unit 4, the control unit 5 controls the DAB reception unit 2 to tune to the frequency of the first ensemble having the lowest frequency in a predetermined DAB band (step S10). , S11). Then, it is checked whether the DAB receiving section 2 has received the DAB broadcast signal (step S12). If not, it is checked whether or not the ensemble with the highest frequency in the DAB band has been searched (step S13). Since it is NO here, the DAB receiving unit 2 is controlled to tune to the next ensemble with the next higher frequency (step S14). S11). Then, it is again checked whether the DAB receiver 2 has received the DAB broadcast signal (step S12). If this is possible, the DAB receiving unit 2 waits for the DAB broadcast management information to be decoded (step S15). If the DAB broadcast management information is decoded, the DAB receiving unit 2 inputs the DAB broadcast management information. Is currently being broadcast (step S16). At this time, it is assumed that services E, F, and G are currently being broadcast in the second ensemble as shown in FIG. If the determination in step 16 is assumed to be the timing of t 1, it is determined NO in step S16. At this time, subsequently, it is checked whether or not the service configuration change notice information exists in the DAB broadcast management information (step S18). Here, too, the result is NO, so that the DAB receiver 2 is controlled to tune to the next ensemble whose frequency is higher by one step (steps S13, S14, S11).
[0012]
Then, it is again checked whether the DAB receiver 2 has received the DAB broadcast signal (step S12). If it can be done again, it waits for DAB broadcast management information to be decoded by the DAB receiving unit 2 (step S15), and when it is decoded, inputs the DAB broadcast management information and firstly refers to the service configuration information of the currently broadcasted service to obtain the desired service. Is currently being broadcast (step S16). At this time, in the third ensemble, as shown in FIG. 3 (2), the services H, I, and J are currently being broadcast, but immediately before the configuration changes to the services H, I, and D. It is assumed that time information is being broadcast together. If the determination in step 16 is assumed to be the timing of t x, it determines NO in step S16. At this time, subsequently, it is checked whether or not the service configuration change notice information exists in the DAB broadcast management information (step S18). This time is YES, so it is checked whether or not the desired service exists in the service configuration after the configuration change indicated by the advance notice information (step S19). If NO, the DAB receiver 2 is controlled again to tune to the frequency of one ensemble related to the channel whose frequency is one step higher (steps S13, S14, S11), but here, YES is determined in step S19. At this time, the remaining time until the input and configuration changes in the new DAB broadcast management information from the DAB receiver unit 2 repeats of checks becomes zero, when the configuration change occurs (see t S in FIG. 3 (2)) In step S20, YES is determined, and the DAB receiving unit 2 is instructed to reproduce and output the sound of the desired program if the desired service is an audio program, and to the desired information if the desired service is weather information or traffic information. Is extracted and input, and the desired information is displayed on the display unit 3 (step S17). As a result, it is possible to promptly output a service desired by the user.
[0013]
According to this embodiment, when the control unit 5A checks the service configuration information in the DAB broadcast signal received by the DAB reception unit 2 to search for a service, the control unit 5A uses only the service configuration information for the service currently being broadcast. If the notice information is present, it is checked whether the desired service exists by referring to the service configuration information after the configuration change indicated by the notice information. Then, when the desired service is not present in the service configuration information of the service currently being broadcast, but is present in the notice information, the desired service is output after waiting for a configuration change. As a result, when the service configuration information in the DAB broadcast signal is checked, if only the service configuration information of the service currently being broadcast is referred to, the case where the desired service starts immediately in the DAB broadcast is overlooked. However, the search for the desired service can be completed quickly without such mistakes.
[0014]
In the above-described embodiment, a case has been described as an example in which a DAB broadcast practically used in Europe is to be received. However, the present invention is not limited to this, and other types of multiplexing may be used. It goes without saying that the present invention can be similarly applied to a case where a broadcast is to be received.
[0015]
【The invention's effect】
According to the present invention, when checking the service configuration information of a multiplex broadcast for searching for a desired service, not only the service configuration information of the service currently being broadcast but also the advance notice information transmitted before a configuration change occurs. , The search for the desired service can be completed promptly without any search error.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a DAB broadcast receiving apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a service search process of a control unit in FIG. 1;
FIG. 3 is an explanatory diagram of a service search operation by the DAB broadcast receiving device of FIG. 1;
FIG. 4 is an explanatory diagram of a DAB transmission frame.
FIG. 5 is an explanatory diagram of a service reconfiguration function in DAB broadcasting.
FIG. 6 is a block diagram illustrating a configuration of a conventional general DAB broadcast receiving apparatus.
FIG. 7 is a flowchart illustrating a service search process of a control unit in FIG. 6;
[Explanation of symbols]
2 DAB receiving unit 3 Display unit 4 Operation unit 5A Control unit

Claims (2)

一つの搬送周波数に複数のサービスが多重化された多重化放送を受信し、所望のサービスの音声または情報を出力したり、サービス構成情報を抽出して出力したりする受信手段を備えた放送受信装置において、
検索対象の所望のサービスを選択する選択手段と、
受信手段が出力したサービス構成情報の中にあらたなサービス構成に変化する予告情報があるか否か判別する判別手段と、
選択手段で所望サービスが選択されると、受信手段を制御して所定の帯域内に存在する複数の多重化放送に順に同調させ、受信手段が或る多重化放送を受信すると、その多重化放送から受信されたサービス構成情報をチェックし、現在放送中のサービス構成情報の中に所望のサービスがあれば当該或る多重化放送への同調を継続させて所望サービスを再生出力させ、現在放送中のサービス構成情報の中に所望のサービスが無く予告情報もなければ次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無く予告情報はあるが予告情報の中にも所望サービスが無いとき次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無いが予告情報が有りかつ予告情報の中に所望サービスが有るとき、当該或る多重化放送への同調を継続させ所望サービスの放送が始まるのを待って所望サービスを再生させるサービス検索制御手段と、
を備えたことを特徴とする放送受信装置。Broadcast reception provided with receiving means for receiving a multiplexed broadcast in which a plurality of services are multiplexed on one carrier frequency, outputting audio or information of a desired service, and extracting and outputting service configuration information In the device,
Selecting means for selecting a desired service to be searched;
Determining means for determining whether there is advance notice information that changes to a new service configuration in the service configuration information output by the receiving means,
When the desired service is selected by the selecting means, the controlling means controls the receiving means to sequentially tune to a plurality of multiplexed broadcasts existing within a predetermined band. When the receiving means receives a multiplexed broadcast, the multiplexed broadcast is received. Check the service configuration information received from, and if there is a desired service in the service configuration information currently being broadcast, continue to tune to the certain multiplexed broadcast and reproduce and output the desired service. If there is no desired service in the service configuration information and no advance notice information, it is tuned to the next multiplexed broadcast, and there is no desired service in the service configuration information currently being broadcast, but there is advance notice information. If there is no desired service, it is tuned to the next multiplexed broadcast, and there is no desired service in the service configuration information currently being broadcast, but there is advance information and there is a desired service in advance information. Come, and service search control means for waiting for the broadcasting of a desired service to continue to tune in the certain multiplexed broadcast begins to play the desired service,
A broadcast receiving device comprising: 一つの搬送周波数に複数のサービスが多重化された多重化放送を受信し、所望のサービスを再生したり、サービス構成情報を抽出して出力したりする受信手段を備えた放送受信装置において、
所望サービスが選択されると、受信手段を制御して所定の帯域内に存在する複数の多重化放送に順に同調させ、
受信手段が或る多重化放送を受信すると、その多重化放送から受信されたサービス構成情報をチェックし、現在放送中のサービス構成情報の中に所望のサービスがあれば当該或る多重化放送への同調を継続させて所望サービスを再生出力させ、現在放送中のサービス構成情報の中に所望のサービスが無く予告情報もなければ次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無く予告情報はあるが予告情報の中にも所望サービスが無いとき次の多重化放送に同調させ、現在放送中のサービス構成情報の中に所望のサービスは無いが予告情報が有りかつ予告情報の中に所望サービスが有るとき、当該或る多重化放送への同調を継続させ所望サービスの放送が始まるのを待って所望サービスを再生させるようにしたこと、
を特徴とする放送受信方法。A broadcast receiving apparatus including a receiving unit that receives a multiplexed broadcast in which a plurality of services are multiplexed on one carrier frequency and reproduces a desired service or extracts and outputs service configuration information.
When the desired service is selected, the receiving unit is controlled to tune in order to a plurality of multiplexed broadcasts existing in a predetermined band,
When the receiving means receives a certain multiplexed broadcast, it checks the service configuration information received from the multiplexed broadcast, and if there is a desired service in the service configuration information currently being broadcast, the reception means switches to the certain multiplexed broadcast. If the desired service is not present in the service configuration information currently being broadcast and there is no prior notice information, the system is tuned to the next multiplexed broadcast and the desired service configuration information is reproduced. If there is no desired service and there is notice information, but there is no desired service in the notice information, it is tuned to the next multiplexed broadcast, and there is no desired service in the service configuration information currently being broadcast, but notice information When the desired service is included in the notice information, the tuning to the certain multiplexed broadcast is continued, and the desired service is reproduced after the start of the broadcasting of the desired service. That,
A broadcast receiving method characterized by the above-mentioned.
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DE04002228T1 (en) 2005-05-04

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