JPH0246126Y2 - - Google Patents
Info
- Publication number
- JPH0246126Y2 JPH0246126Y2 JP15829785U JP15829785U JPH0246126Y2 JP H0246126 Y2 JPH0246126 Y2 JP H0246126Y2 JP 15829785 U JP15829785 U JP 15829785U JP 15829785 U JP15829785 U JP 15829785U JP H0246126 Y2 JPH0246126 Y2 JP H0246126Y2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- receiver
- detector
- radio
- traffic information
- 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.)
- Expired
Links
- 239000000284 extract Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Circuits Of Receivers In General (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はラジオ放送用受信機に関し、特に音声
情報の了解度を向上させる技術に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a radio broadcast receiver, and particularly relates to a technique for improving the intelligibility of audio information.
従来のラジオ放送用受信機、特に車載用ラジオ
受信機は、可聴周波数帯の全ての信号を忠実度良
く再生し得るものが良い受信機と認められ、故意
に再生音の或る帯域をカツトするように構成され
たラジオ放送用受信機を提案されていない。
Conventional radio broadcast receivers, especially car-mounted radio receivers, are considered good receivers if they can reproduce all signals in the audible frequency band with high fidelity, and they intentionally cut out certain bands of reproduced sound. No radio broadcasting receiver configured as described above has been proposed.
しかし、このような高忠実度のラジオ放送用受
信機は、良好な受信環境で音楽などを聴取する場
合には好ましいものであるが、受信環境が悪く且
つ放送内容が音声情報に限られる場合にはその高
忠実度が却つて災いし、音声情報の了解度を低下
させる原因となる。即ち、弱電界地域や隣接局の
影響が大きい地域では雑音や混信が多くなるが、
そのような場合忠実度の高い受信機では却つて耳
障りになり、了解度の悪い再生音になつてしま
う。
However, although such high-fidelity radio broadcast receivers are preferable when listening to music etc. in a good reception environment, they are not suitable when the reception environment is poor and the broadcast content is limited to audio information. However, its high fidelity can be a problem and cause the intelligibility of audio information to deteriorate. In other words, noise and interference increase in areas with weak electric fields or areas where the influence of neighboring stations is large;
In such a case, a receiver with high fidelity will produce reproduced sound that is harsh and difficult to understand.
このようなことが最も問題となるのは、自動車
に搭載されたラジオ受信機により交通情報や緊急
情報を聴く場合である。即ち、最近一部の地域で
はラジオ放送周波数帯の一部を使用して交通情報
や緊急情報が流されており、一般の車に搭載され
たラジオ放送用受信機でこれを聴取することがで
きる。しかし、車載用受信機の環境は通常の受信
機と異なり大変悪く、自車両から発生する音響
的、電磁的雑音に加え他車両からの雑音や移動に
伴う電界の変化等が加わる。従つて、高忠実度な
車載用ラジオ受信機ではしばさば交通情報や緊急
情報が聴きずらくなるという問題がある。 This is most problematic when listening to traffic information or emergency information using a radio receiver installed in a car. In other words, traffic information and emergency information have recently been broadcast using a portion of the radio broadcast frequency band in some areas, and can be heard using radio broadcast receivers installed in ordinary cars. . However, unlike a normal receiver, the environment of a vehicle-mounted receiver is very poor, and in addition to acoustic and electromagnetic noise generated by the own vehicle, noise from other vehicles and changes in electric fields due to movement are added. Therefore, high-fidelity in-vehicle radio receivers often have the problem of making it difficult to listen to traffic information and emergency information.
本考案はこのような従来の問題点を解決したも
ので、その目的は、忠実度の良い再生と、忠実度
は低下するが交通情報等の了解度は優れている再
生とを場合に応じて切換えることができるラジオ
放送用受信機を提供することにある。 The present invention solves these conventional problems, and its purpose is to reproduce reproduction with good fidelity and reproduction with lower fidelity but with better intelligibility of traffic information etc., depending on the case. An object of the present invention is to provide a switchable radio broadcasting receiver.
本考案は上記目的を達成するために、ラジオ放
送用受信機の検波器の後段に設けられ検波出力の
中からほぼ音声周波数帯域成分のみを抽出するフ
イルタと、前記検波器の検波出力を前記フイルタ
を介して後段の回路に導くパスと前記フイルタを
介さずに後段の回路に導くパスとを交通情報放送
の受信の有無に応じて切換えるスイツチとを設け
る。
In order to achieve the above object, the present invention includes a filter that is installed after the detector of a radio broadcasting receiver and extracts almost only audio frequency band components from the detected output, and a filter that extracts almost only audio frequency band components from the detected output. A switch is provided for switching between a path leading to the subsequent circuit via the filter and a path leading to the subsequent circuit without passing through the filter, depending on whether or not the traffic information broadcast is received.
検波器の検波出力がフイルタを介さずに後段の
回路に導かれるように切換スイツチを切換えれ
ば、ラジオ放送用受信機の有する忠実度を何等損
なわない再生音を得ることができ、検波出力がフ
イルタを介して後段の回路に導かれるように切換
スイツチを切換えれば、検波出力のうちの音声周
波数帯域成分のみがスピーカに導かれ、他の可聴
周波数成分はカツトされるので、その分混信や雑
音による影響が除去され、交通情報等を了解度よ
く聴取することができる。
By changing the switch so that the detection output of the detector is guided to the subsequent circuit without going through a filter, it is possible to obtain reproduced sound that does not impair the fidelity of the radio broadcast receiver, and the detection output is If you change the switch so that it is guided to the subsequent circuit via a filter, only the audio frequency band component of the detected output will be guided to the speaker, and other audio frequency components will be cut out, thereby reducing interference. The influence of noise is removed, and traffic information etc. can be heard with good intelligibility.
第１図は本考案の実施例のブロツク図であり、
１は受信アンテナ、２は高周波増幅器（RF）、３
は混合器（MIX）、４は局部発信器（OCL）、５
は中間周波増幅器（IF）、６は検波器（DET）、
７は電力増幅器（PAMP）、８はスピーカ（SP）
であつてこれらは従来から備えられているもので
ある。
FIG. 1 is a block diagram of an embodiment of the present invention.
1 is the receiving antenna, 2 is the radio frequency amplifier (RF), 3
is mixer (MIX), 4 is local oscillator (OCL), 5 is
is an intermediate frequency amplifier (IF), 6 is a detector (DET),
7 is a power amplifier (PAMP), 8 is a speaker (SP)
These are conventionally provided.
本実施例は上記従来構成に加え、同図に示すよ
うに検波器６と電力増幅器７の間に、検波出力の
中からほぼ音声周波数帯域成分のみを抽出するフ
イルタ（FIL）９と、検波器６の検波出力をフイ
ルタ９を介して電力増幅器７に導くパスとフイル
タ９を介さずに電力増幅器７に導くパスとを切換
える切換スイツチ１０，１１とを設ける。 In addition to the above-mentioned conventional configuration, this embodiment includes a filter (FIL) 9 between the detector 6 and the power amplifier 7, which extracts almost only audio frequency band components from the detected output, as shown in the figure. Switches 10 and 11 are provided for switching between a path for guiding the detected output of 6 to the power amplifier 7 via the filter 9 and a path for guiding the detected output to the power amplifier 7 without passing through the filter 9.
第２図はフイルタ９の実施例の回路図であり、
バツフアアンプ９０と、抵抗Ｒ、コイルＬ及びコ
ンデンサＣから成るローパスフイルタ部９１と、
バツフアアンプ９２とから構成される。上記抵抗
Ｒの抵抗値を例えば2.2KΩ、コイルのインダクタ
ンス値を例えば100mH、コンデンサＣの容量を
例えば0.33μFとすることにより、ローパスフイル
タ部９１の伝送周波数特性を例えば第３図に示す
ように人の音声のフオルマントの帯域をほぼカバ
ーし、それ以外の可聴周波数帯の信号をカツトす
るような特性を得ることができる。 FIG. 2 is a circuit diagram of an embodiment of the filter 9,
a buffer amplifier 90; a low-pass filter section 91 consisting of a resistor R, a coil L, and a capacitor C;
It is composed of a buffer amplifier 92. By setting the resistance value of the resistor R to, for example, 2.2KΩ, the inductance value of the coil to, for example, 100mH, and the capacitance of the capacitor C to, for example, 0.33μF, the transmission frequency characteristics of the low-pass filter section 91 can be adjusted as shown in FIG. It is possible to obtain characteristics that cover most of the voice formant band and cut out signals in other audible frequency bands.
本実施例は以上のような構成を有するため、例
えば交通情報を聴取したときに音声情報の了解度
が悪ければ、検波器６の出力がフイルタ９を介し
て電力増幅器７に入力されるように切換スイツチ
１０，１１を切換えることにより、音声周波数帯
域の再生音のみがスピーカ８に導かれ、他の可聴
周波数帯に存在する雑音成分が除去されるので、
音声情報の了解度が向上する。また、再生帯域が
狭くなる分、Ｓ／Ｎ比を向上する。また、音声情
報以外に音楽等が含まれる放送を受信する場合に
は、検波器６の出力がフイルタ９を介さずに直接
電力増幅器７に導かれるようにすれば、受信機の
本来有する忠実度で再生を行なわせることができ
る。 Since this embodiment has the above configuration, for example, when listening to traffic information, if the intelligibility of the audio information is poor, the output of the detector 6 is input to the power amplifier 7 via the filter 9. By switching the changeover switches 10 and 11, only the reproduced sound in the audio frequency band is guided to the speaker 8, and noise components existing in other audio frequency bands are removed.
The intelligibility of audio information is improved. Furthermore, since the reproduction band becomes narrower, the S/N ratio is improved. Furthermore, when receiving a broadcast that includes music, etc. in addition to audio information, the output of the detector 6 can be guided directly to the power amplifier 7 without going through the filter 9, thereby maintaining the inherent fidelity of the receiver. can be played back.
上記切換スイツチ１０，１１は、受信機の前面
パネル等に設けられ操作スイツチ等により手動で
働く連動スイツチとしても良い。また、交通情報
送信局を自動的に識別して受信する交通情報受信
識別機能を有する車載用ラジオ受信機において
は、交通情報が受信されたときにその識別信号に
応答してフイルタ不挿入側に切換わるスイツチと
することもできる。 The changeover switches 10 and 11 may be interlocking switches provided on the front panel of the receiver or the like and operated manually by an operation switch or the like. In addition, in car radio receivers that have a traffic information reception identification function that automatically identifies and receives traffic information transmitting stations, when traffic information is received, the filter is not inserted in response to the identification signal. It can also be a switch.
以上説明したように、本考案は、ラジオ放送用
受信機の検波器の後段に検波出力の中からほぼ音
声周波数帯域成分のみを抽出するフイルタを切換
スイツチにより挿抜自在に取り付けたので、検波
出力がフイルタを介して後段の回路に導かれるよ
うに切換スイツチを切換えれば音声情報を了解度
よく聴取することができ、検波器の検波出力がフ
イルタを介さずに後段の回路に導かれるように切
換スイツチを切換えれば、ラジオ放送用受信機の
有する忠実度を何等損なわない再生音を得ること
ができる効果がある。
As explained above, in the present invention, a filter that extracts almost only the audio frequency band components from the detected output is attached to the downstream of the detector of a radio broadcasting receiver so that it can be inserted and removed using a changeover switch. If you change the switch so that it is guided to the subsequent circuit via a filter, you can listen to audio information with good intelligibility, and you can also switch so that the detection output of the detector is guided to the subsequent circuit without passing through the filter. By switching the switch, it is possible to obtain reproduced sound that does not impair the fidelity of the radio broadcasting receiver.
第１図は本考案の実施例のブロツク図、第２図
は第１図のフイルタ９の実施例の回路図および、
第３図はローパスフイルタ部９１の伝送周波数特
性図である。
１は受信アンテナ、２は高周波増幅器、３は混
合器、４は局部発信器、５は中間周波増幅器、６
は検波器、７は電力増幅器、８はスピーカ、９は
フイルタ、１０，１１は切換スイツチである。
FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of an embodiment of the filter 9 shown in FIG.
FIG. 3 is a transmission frequency characteristic diagram of the low-pass filter section 91. 1 is a receiving antenna, 2 is a high frequency amplifier, 3 is a mixer, 4 is a local oscillator, 5 is an intermediate frequency amplifier, 6
is a detector, 7 is a power amplifier, 8 is a speaker, 9 is a filter, and 10 and 11 are changeover switches.
Claims (1)
検波出力の中からほぼ音声周波数帯域成分のみを
抽出するフイルタと、 前記検波器の検波出力を前記フイルタを介して
後段の回路に導くパスと前記フイルタを介さずに
後段の回路に導くパスとを交通情報放送の受信の
有無に応じて切換える切換スイツチとを具備した
ことを特徴とするラジオ放送用受信機。[Scope of Utility Model Registration Claim] A filter that is installed after a detector of a radio broadcasting receiver and extracts almost only audio frequency band components from the detected output; A receiver for radio broadcasting, characterized in that it is equipped with a changeover switch that switches between a path leading to a subsequent circuit and a path leading to a subsequent circuit without passing through the filter, depending on whether or not a traffic information broadcast is being received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15829785U JPH0246126Y2 (en) | 1985-10-16 | 1985-10-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15829785U JPH0246126Y2 (en) | 1985-10-16 | 1985-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6266436U JPS6266436U (en) | 1987-04-24 |
| JPH0246126Y2 true JPH0246126Y2 (en) | 1990-12-05 |
Family
ID=31081654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15829785U Expired JPH0246126Y2 (en) | 1985-10-16 | 1985-10-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246126Y2 (en) |
-
1985
- 1985-10-16 JP JP15829785U patent/JPH0246126Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6266436U (en) | 1987-04-24 |
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