JPH07231269A - Radio receiver - Google Patents

Radio receiver

Info

Publication number
JPH07231269A
JPH07231269A JP4511494A JP4511494A JPH07231269A JP H07231269 A JPH07231269 A JP H07231269A JP 4511494 A JP4511494 A JP 4511494A JP 4511494 A JP4511494 A JP 4511494A JP H07231269 A JPH07231269 A JP H07231269A
Authority
JP
Japan
Prior art keywords
data
search
list
rds
station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4511494A
Other languages
Japanese (ja)
Other versions
JP2928717B2 (en
Inventor
Yoshito Arai
井 由 人 新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kenwood KK
Original Assignee
Kenwood KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kenwood KK filed Critical Kenwood KK
Priority to JP4511494A priority Critical patent/JP2928717B2/en
Publication of JPH07231269A publication Critical patent/JPH07231269A/en
Application granted granted Critical
Publication of JP2928717B2 publication Critical patent/JP2928717B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To obtain a radio receiver in which a sound output when a broadcast station not being an RDS station is received is prevented to acquire more effective AF service. CONSTITUTION:Continuity of RDS data obtained by a demodulation section 8 for a prescribed time or over is discriminated and when not consecutive, a mute circuit 6 is operated to stop sound output and a reception frequency before AF search is set. When the data are consecutive for the prescribed time or longer, the operation of the mute circuit 6 is stopped to provide a sound output and the AF search is continued. The receiver stores the frequency before transit to the AF search as priority AF data.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はラジオ受信機に関し、特
にRDSに使用して有効なラジオ受信機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiver, and more particularly to a radio receiver effective for use in RDS.

【0002】[0002]

【従来の技術】ヨーロッパ域においては、FMラジオ放
送信号に選局データや番組識別データをデジタル多重化
して車両のドライバーに対して各種のサービスを提供す
るRDS(Radio Data System)が実用化されており、
今後、世界的な普及が期待される。代表的なRDSサー
ビスとしては、国や受信地域、放送局の番組名を識別す
るPI(番組識別)サービス、受信されている放送局名
をチューナーのディスプレイに表示するPS(受信局名
表示)サービス、同一内容の番組を放送している他の放
送局周波数を表示するAF(類似番組放送周波数リス
ト)サービス、交通情報の放送局を識別するTPサービ
ス等がある。
2. Description of the Related Art In Europe, an RDS (Radio Data System) has been put into practical use, which provides various services to vehicle drivers by digitally multiplexing tuning data and program identification data into FM radio broadcast signals. Cage,
It is expected that it will spread worldwide. Typical RDS services include a PI (program identification) service that identifies the country, the receiving area, and the program name of the broadcasting station, and a PS (displaying the receiving station name) service that displays the receiving broadcasting station name on the tuner display. , An AF (similar program broadcast frequency list) service that displays frequencies of other broadcast stations broadcasting the same program, and a TP service that identifies a broadcast station of traffic information.

【0003】AFサービスは、車載チューナーによる放
送局から送信されるRDS電波の受信電界強度が一定レ
ベル以下に低下したときに、同一プログラム放送の他の
放送局電波を受信できるようなサーチ機能をもたせてい
る。このサーチは、予め放送局から送信されるAFリス
トをメモリに記憶し、記憶されているAFリストに基づ
いて行われる。
The AF service has a search function so that when the reception electric field strength of an RDS radio wave transmitted from a broadcasting station by an in-vehicle tuner drops below a certain level, the radio wave of another broadcasting station of the same program broadcast can be received. ing. This search is performed based on the AF list stored in advance by storing the AF list transmitted from the broadcasting station in the memory.

【0004】例えば、自動車で走行中、或る放送局から
の電波強度が弱くなると、当該受信地域で受信したAF
リストに基づいて同一放送内容を送信している他局を自
動的に受信する。その際、車載メモリに記憶されている
AFリストは、当該地域で受信したAFリストに更新さ
れる。
For example, when the intensity of a radio wave from a certain broadcasting station becomes low while driving in a car, the AF received in the receiving area is reduced.
Other stations that are transmitting the same broadcast content are automatically received based on the list. At that time, the AF list stored in the vehicle-mounted memory is updated to the AF list received in the area.

【0005】[0005]

【発明が解決しようとする課題】上述のように、従来の
RDSラジオ受信機のAFサービス処理は実行される。
しかしながら、例えば、放送局であるA局とB局があ
り、A局のAFリストにはB局の周波数があり、B局の
AFリストにはA局の周波数がない場合、走行によりA
局からB局への移行時に、A局の周波数を強制的にAF
リストに入れた後、B局を選局することになるが、B局
のAFリストにA局の周波数がない場合にはA局の周波
数は消去されてしまう。次に、B局からA局への移行時
にAFリストにA局の周波数がないため同様の処理をす
るので迅速なサービスが得られないばかりか、A局とB
局の間を行ったり来たりするたびにAFサーチに時間が
かかってしまうという問題がある。
As described above, the AF service processing of the conventional RDS radio receiver is executed.
However, for example, if there are stations A and B that are broadcasting stations, the AF list of station A contains the frequency of station B, and the AF list of station B does not contain the frequency of station A, the
Frequency of station A is forced to be AF when shifting from station B to station B
After being added to the list, station B will be selected, but if the frequency of station A is not in the AF list of station B, the frequency of station A will be deleted. Next, since the same process is performed because there is no frequency of station A in the AF list when moving from station B to station A, a quick service cannot be obtained.
There is a problem that the AF search takes time every time when moving back and forth between stations.

【0006】そこで、本発明の目的は、移行前の周波数
を消去せず、より有効なAFサービスが得られるラジオ
受信機を提供することにある。
Therefore, an object of the present invention is to provide a radio receiver which can obtain a more effective AF service without erasing the frequency before transition.

【0007】[0007]

【課題を解決するための手段】前述の課題を解決するた
め、本発明によるラジオ受信機は、RDSデータを受信
し、該RDSデータに含まれるAFリストをメモリに記
憶し、前記メモリに記憶されているAFリストに基づい
て受信状態の良好な局へ自動的に切り換えるAFサーチ
機能を有し、受信電波電界強度の低下に応答して前記A
Fサーチを開始し、サーチされた局電波を受信後、前記
AFリストを更新するRDS受信機において、前記AF
サーチ時に、サーチ前に受信していた周波数を優先AF
データとして前記メモリに記憶し、前記AFリストの更
新時には前記優先AFデータを更新しないように構成さ
れる。
In order to solve the above-mentioned problems, a radio receiver according to the present invention receives RDS data, stores an AF list included in the RDS data in a memory, and stores the AF list in the memory. It has an AF search function that automatically switches to a station in a good reception state based on the AF list that is in use, and responds to the above-mentioned A
After the F search is started and the searched local radio wave is received, the AF list is updated in the RDS receiver that updates the AF list.
At the time of search, priority is given to the frequency received before the search
The data is stored in the memory as data, and the priority AF data is not updated when the AF list is updated.

【0008】[0008]

【作用】本発明では、RDS受信機において、AFサー
チ時に、サーチ前に受信していた周波数を優先AFデー
タとしてメモリに記憶し、AFリストの更新時には優先
AFデータは更新しないようにしている。
According to the present invention, in the RDS receiver, the frequency received before the search is stored in the memory as the priority AF data during the AF search, and the priority AF data is not updated when the AF list is updated.

【0009】[0009]

【実施例】次に、本発明の実施例について図面を参照し
ながら説明する。図1(A)と(B)は、本発明による
ラジオ受信機の一実施例の動作処理手順を示すフローチ
ャートである。また、図2は、本実施例を実現するため
のラジオ受信機の構成ブロック図である。
Embodiments of the present invention will now be described with reference to the drawings. FIGS. 1A and 1B are flowcharts showing the operation processing procedure of an embodiment of the radio receiver according to the present invention. Further, FIG. 2 is a block diagram showing the configuration of a radio receiver for realizing this embodiment.

【0010】先ず、図2を参照して本実施例のラジオ受
信機の構成を説明すると、アンテナ1で受信された受信
信号は、フロントエンド2でIF信号に変換される。フ
ロントエンド2には、電圧制御発振器(VCO)や混合
器が内蔵され、PLL回路3と協動してマイクロコンピ
ュータ9からのコントロール信号に基づく受信周波数の
設定が行われる。変換されたIF信号は、IF検波回路
(IF/DET)4で検波された後、ボリューム回路5
で音量が調整される。
First, the configuration of the radio receiver of this embodiment will be described with reference to FIG. 2. The reception signal received by the antenna 1 is converted into an IF signal by the front end 2. The front end 2 has a voltage controlled oscillator (VCO) and a mixer built therein, and cooperates with the PLL circuit 3 to set a reception frequency based on a control signal from the microcomputer 9. The converted IF signal is detected by the IF detection circuit (IF / DET) 4 and then the volume circuit 5
Adjust the volume with.

【0011】IF検波回路4の出力は、受信感度検出回
路7において、受信感度が例えば電界強度として検出さ
れ、マイクロコンピュータ9に送出される。RDSデー
タ復調回路8は、IF検波回路4からの検波信号を復調
し、得られたRDSデータをマイクロコンピュータ9に
送出する。
The output of the IF detection circuit 4 is detected by the reception sensitivity detection circuit 7 as the reception sensitivity, for example, as the electric field strength, and is sent to the microcomputer 9. The RDS data demodulation circuit 8 demodulates the detection signal from the IF detection circuit 4 and sends the obtained RDS data to the microcomputer 9.

【0012】マイクロコンピュータ9は、受信感度検出
回路7からの感度信号と、RDSデータ復調回路8から
のRDSデータを受けて、前述RDSサービスを行う。
RAM10は、受信したRDSデータに含まれるAFリ
ストを格納するメモリであり、マイクロコンピュータ9
により読み出し、更新が行われる。
The microcomputer 9 receives the sensitivity signal from the reception sensitivity detection circuit 7 and the RDS data from the RDS data demodulation circuit 8 to perform the RDS service.
The RAM 10 is a memory that stores the AF list included in the received RDS data.
Is read out and updated.

【0013】ミュート回路6は、マイクロコンピュータ
9の制御を受け、ボリューム回路5からの音声信号にミ
ュート処理を施す。ミュート回路6を通った音声信号
は、出力アンプ11で増幅された後、スピーカ12から
出力される。
The mute circuit 6, under the control of the microcomputer 9, performs a mute process on the audio signal from the volume circuit 5. The audio signal passing through the mute circuit 6 is amplified by the output amplifier 11 and then output from the speaker 12.

【0014】本実施例では、マイクロコンピュータ9に
よりAFリストの書き込み、更新等の処理を行うが、以
下その処理手順を図1を参照して説明する。
In the present embodiment, the microcomputer 9 performs processing such as writing and updating of the AF list. The processing procedure will be described below with reference to FIG.

【0015】AFサーチ移行処理は、図1(A)に示す
ように、移行前の周波数を優先AFとしてRAM10に
記憶する。
In the AF search shift processing, as shown in FIG. 1A, the frequency before shift is stored in the RAM 10 as the priority AF.

【0016】また、AFの更新処理は、図1(B)に示
すように、先ず、AFデータが入力された後、入力され
たAFデータが更新する条件であるか否かを判定する
(ステップS1)。ここで、更新条件であれば、RAM
10に記憶されている当該AFデータが優先AFデータ
として記憶されているか否かを判定する(ステップS
2)。ステップS1とS2において、更新条件でなかっ
たり、優先AFデータとして記憶されていれば、そのま
ま処理を終了する。ステップS2において、優先AFデ
ータとして記憶されていなければ、RAM10に記憶さ
れている当該AFデータを消去する(ステップS3)。
In the AF update process, as shown in FIG. 1B, first, after the AF data is input, it is determined whether the input AF data is a condition for updating (step). S1). If the update condition is set, the RAM
It is determined whether the AF data stored in 10 is stored as priority AF data (step S
2). In steps S1 and S2, if it is not the update condition or it is stored as the priority AF data, the process is ended as it is. If it is not stored as the priority AF data in step S2, the AF data stored in the RAM 10 is erased (step S3).

【0017】[0017]

【発明の効果】以上説明したように、本発明によるラジ
オ受信機によれば、AFサーチ移行前の周波数を優先A
Fデータとして記憶しているので、よりスムーズなAF
サーチが可能となる。
As described above, according to the radio receiver of the present invention, the frequency before the AF search transition is given priority A.
As it is stored as F data, smoother AF
Search is possible.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明によるラジオ受信機の一実施例の動作処
理手順を示すフローチャートである。
FIG. 1 is a flowchart showing an operation processing procedure of an embodiment of a radio receiver according to the present invention.

【図2】本実施例を実現するためのラジオ受信機の構成
ブロック図である。
FIG. 2 is a configuration block diagram of a radio receiver for realizing the present embodiment.

【符号の説明】[Explanation of symbols]

1 アンテナ 2 フロントエンド 3 PLL回路 4 IF検波回路 5 ボリューム回路 6 ミュート回路 7 受信感度検出回路 8 RDSデータ復調回路 9 マイクロコンピュータ 10 RAM 11 出力アンプ 12 スピーカ 1 Antenna 2 Front End 3 PLL Circuit 4 IF Detection Circuit 5 Volume Circuit 6 Mute Circuit 7 Reception Sensitivity Detection Circuit 8 RDS Data Demodulation Circuit 9 Microcomputer 10 RAM 11 Output Amplifier 12 Speaker

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】RDSデータを受信し、該RDSデータに
含まれるAFリストをメモリに記憶し、前記メモリに記
憶されているAFリストに基づいて受信状態の良好な局
へ自動的に切り換えるAFサーチ機能を有し、受信電波
電界強度の低下に応答して前記AFサーチを開始し、サ
ーチされた局電波を受信後、前記AFリストを更新する
RDS受信機において、 前記AFサーチ時に、サーチ前に受信していた周波数を
優先AFデータとして前記メモリに記憶し、前記AFリ
ストの更新時には前記優先AFデータを更新しないよう
に構成されて成ることを特徴とするラジオ受信機。
1. An AF search for receiving RDS data, storing an AF list included in the RDS data in a memory, and automatically switching to a station in a good reception state based on the AF list stored in the memory. An RDS receiver having a function, which starts the AF search in response to a decrease in the electric field strength of a received radio wave and updates the AF list after receiving the searched local radio wave, at the time of the AF search, before the search. A radio receiver, characterized in that the received frequency is stored in the memory as priority AF data, and the priority AF data is not updated when the AF list is updated.
JP4511494A 1994-02-18 1994-02-18 Radio receiver Expired - Fee Related JP2928717B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4511494A JP2928717B2 (en) 1994-02-18 1994-02-18 Radio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4511494A JP2928717B2 (en) 1994-02-18 1994-02-18 Radio receiver

Publications (2)

Publication Number Publication Date
JPH07231269A true JPH07231269A (en) 1995-08-29
JP2928717B2 JP2928717B2 (en) 1999-08-03

Family

ID=12710245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4511494A Expired - Fee Related JP2928717B2 (en) 1994-02-18 1994-02-18 Radio receiver

Country Status (1)

Country Link
JP (1) JP2928717B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7003053B2 (en) 2000-12-04 2006-02-21 Sanyo Electric Co., Ltd. Digital broadcast receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7003053B2 (en) 2000-12-04 2006-02-21 Sanyo Electric Co., Ltd. Digital broadcast receiver

Also Published As

Publication number Publication date
JP2928717B2 (en) 1999-08-03

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