JPH05206884A - On-vehicle receiver - Google Patents
On-vehicle receiverInfo
- Publication number
- JPH05206884A JPH05206884A JP4013994A JP1399492A JPH05206884A JP H05206884 A JPH05206884 A JP H05206884A JP 4013994 A JP4013994 A JP 4013994A JP 1399492 A JP1399492 A JP 1399492A JP H05206884 A JPH05206884 A JP H05206884A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- noise
- broadcast
- radio wave
- frequency
- 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.)
- Withdrawn
Links
Landscapes
- Noise Elimination (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はラジオ放送を受信するた
めの車両用受信装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle receiver for receiving radio broadcasting.
【０００２】[0002]
【従来の技術】ラジオ放送を受信するための車両用受信
装置にイグニションスイッチやその他の補機類が作動し
たときに生じる電波が雑音信号として入力されると、ス
ピーカから雑音が聞こえて乗員が不快感を受けるので、
特開昭６３−１５８９２９号公報に示されるように、ス
イッチングノイズを除去する手段を備えた車両用ＡＭラ
ジオ受信機が提案されている。2. Description of the Related Art When a radio wave generated when an ignition switch or other auxiliary equipment is operated is input as a noise signal to a vehicle receiving device for receiving a radio broadcast, noise is heard from a speaker and an occupant is injured. Because I feel pleasant
As disclosed in Japanese Patent Laid-Open No. 63-158929, an AM radio receiver for vehicles equipped with a means for removing switching noise has been proposed.
【０００３】一方、ＦＭ放送を受信する車両用受信装置
としては、ＦＭ放送を受信するためのＦＭ放送受信用ア
ンテナと、該ＦＭ放送受信用アンテナにより受信した電
波の音響特性を決定してスピーカに出力する音響特性決
定手段と、雑音信号が入力されると雑音低減信号を上記
音響特性決定手段に出力して該音響特性決定手段に雑音
を低減させるマルチパス低減回路やノイズキャンセラ等
の雑音低減手段とを備えたものが知られている。On the other hand, as a vehicular receiving apparatus for receiving FM broadcasting, an FM broadcasting receiving antenna for receiving FM broadcasting, and acoustic characteristics of radio waves received by the FM broadcasting receiving antenna are determined to be a speaker. An acoustic characteristic determining means for outputting, and a noise reducing means such as a multipath reducing circuit or a noise canceller for outputting a noise reduction signal to the acoustic characteristic determining means when a noise signal is input to reduce noise in the acoustic characteristic determining means. Those equipped with are known.
【０００４】この場合、マルチパス低減回路は、電界強
度が急激に落ちたときに生じるノイズを除去するもので
あって８０〜１００ｋＨｚの周波数の電波を雑音信号と
して受け、該雑音信号を受けると音響特性決定手段を構
成するセパレーション設定手段及び周波数特性設定手段
に雑音低減信号を送り、ステレオ放送をモノラル放送に
変更したり或いは高い周波数の音を除去したりしてノイ
ズを目立たなくさせるものである。一方、ノイズキャン
セラは、イグニションスイッチその他の補機類が作動す
るとＦＭ放送の電波の振幅が急に大きくなってノイズと
なる現象を防止するものであって、上記の現象は１００
〜２００ｋＨｚの周波数の電波に発生することが多いこ
とに鑑み、１００〜２００ｋＨｚの周波数の電波を雑音
信号として受け、該雑音信号を受けると音響特性決定手
段を構成するローパスフィルタに雑音低減信号を送り、
ローパスフィルタを通過する振幅が大きい信号をカット
してノイズを目立たなくさせるものである。In this case, the multipath reducing circuit removes noise generated when the electric field strength drops sharply, and receives radio waves having a frequency of 80 to 100 kHz as a noise signal, and when the noise signal is received, the sound is generated. The noise reduction signal is sent to the separation setting means and the frequency characteristic setting means which constitute the characteristic determining means to change the stereo broadcasting to the monaural broadcasting or remove the high frequency sound to make the noise inconspicuous. On the other hand, the noise canceller prevents a phenomenon in which the amplitude of the radio wave of FM broadcasting suddenly increases when the ignition switch and other auxiliary devices are activated, which causes noise.
In view of the fact that radio waves with a frequency of up to 200 kHz are often generated, a radio wave with a frequency of 100 to 200 kHz is received as a noise signal, and when the noise signal is received, a noise reduction signal is sent to a low-pass filter that constitutes acoustic characteristic determination means. ,
The signal that passes through the low-pass filter and has a large amplitude is cut to make noise inconspicuous.
【０００５】[0005]
【発明が解決しようとする課題】ところで、ＦＭ放送の
多様化に伴い、ＦＭ放送の周波数の領域が拡張される傾
向にあり、例えばＦＭ多重放送は８５．５ｋＨｚの周波
数で放送される。By the way, with the diversification of FM broadcasting, the frequency range of FM broadcasting tends to be expanded. For example, FM multiplex broadcasting is broadcast at a frequency of 85.5 kHz.
【０００６】このため、上記のＦＭ多重放送をＦＭ放送
受信用アンテナが受信すると、マルチパス低減回路やノ
イズキャンセラ等の雑音低減手段はＦＭ多重放送の電波
を雑音信号として受け取ってしまい、雑音低減信号を音
響特性決定手段に出力し該音響特性決定手段に雑音を低
減させてしまう場合がある。Therefore, when the FM multiplex broadcasting antenna is received by the FM multiplex broadcasting antenna, noise reducing means such as a multipath reducing circuit or a noise canceller receives the radio waves of the FM multiplex broadcasting as a noise signal, and the noise reduced signal is received. In some cases, the noise may be output to the acoustic characteristic determining unit to reduce noise.
【０００７】ところが、音響特性決定手段が雑音を低減
させるということは上述のように高い周波数領域の音を
カットしたり、ステレオ放送をモノラル放送にしたり或
いは振幅が大きい音をカットしたりすることであるか
ら、乗員がＦＭ放送で音楽を聞いている場合等には音質
が悪くなってしまうことになる。However, the fact that the acoustic characteristic determining means reduces noise means that the sound in the high frequency region is cut as described above, the stereo broadcast is changed to monaural broadcast, or the sound with large amplitude is cut. Therefore, the sound quality is deteriorated when the passenger is listening to music on the FM broadcast.
【０００８】上記に鑑みて、本発明は、ＦＭ放送受信用
アンテナが受信するＦＭ放送の電波を雑音低減手段が雑
音信号として受け取るという事態を防止し、ＦＭ放送に
おける音質の低下を防止することを目的とする。In view of the above, the present invention prevents the situation where the noise reducing means receives the radio wave of the FM broadcast received by the FM broadcast receiving antenna as a noise signal, and prevents the deterioration of the sound quality in the FM broadcast. To aim.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
め、請求項１の発明は、所定周波数の信号、例えば雑音
となる電波と混同されやすい所定周波数のＦＭ放送の電
波が雑音低減手段に入力される事態を防止するものであ
る。In order to achieve the above object, the invention of claim 1 uses a signal of a predetermined frequency, for example, a radio wave of FM broadcasting of a predetermined frequency that is easily confused with a radio wave that becomes noise, as noise reduction means. It prevents the input situation.
【００１０】具体的に本発明が講じた解決手段は、ＦＭ
放送を受信するためのＦＭ放送受信用アンテナと、該Ｆ
Ｍ放送受信用アンテナにより受信した電波の音響特性を
決定してスピーカに出力する音響特性決定手段と、雑音
信号が入力されると雑音低減信号を上記音響特性決定手
段に出力して該音響特性決定手段に雑音を低減させる雑
音低減手段とを備えた車両用受信装置を対象とし、上記
雑音低減手段の入力側に設けられ、入力された信号から
所定周波数の信号を除去して残りの信号を雑音信号とし
て上記雑音低減手段に出力する信号フィルタ手段を備え
ている構成とするものである。[0010] Specifically, the solution provided by the present invention is FM
FM broadcast receiving antenna for receiving broadcast, and the F
Acoustic characteristic determining means for determining the acoustic characteristic of the radio wave received by the M broadcast receiving antenna and outputting it to the speaker; and, when a noise signal is input, outputting a noise reduction signal to the acoustic characteristic determining means for determining the acoustic characteristic. A receiving device for a vehicle, which is provided with a noise reducing means for reducing noise in the means, is provided on the input side of the noise reducing means, removes a signal of a predetermined frequency from the input signal, and eliminates the remaining signal as noise. A signal filter means for outputting a signal to the noise reduction means is provided.
【００１１】請求項２の発明は、雑音となる電波と混同
されやすい所定周波数のＦＭ放送が出力されていない地
域又は時間帯を車両が走行中に偶々上記所定周波数の雑
音が入力されたとき、該雑音が上記信号フィルタ手段に
よって除去されてしまう事態を避けるものであって、請
求項１の車両用受信装置が、さらに上記ＦＭ放送受信用
アンテナが所定周波数のＦＭ放送の電波を受信していな
いときには上記信号フィルタ手段の作動を停止させるフ
ィルタ作動停止手段を備えている構成を付加するもので
ある。According to a second aspect of the present invention, when the vehicle accidentally receives the noise of the predetermined frequency while the vehicle is traveling in an area or a time zone in which the FM broadcast of the predetermined frequency, which is easily confused with a radio wave that becomes noise, is not output, In order to avoid the situation where the noise is removed by the signal filter means, the vehicle receiver according to claim 1, wherein the FM broadcast receiving antenna further does not receive an FM broadcast radio wave of a predetermined frequency. In some cases, a configuration including a filter operation stopping means for stopping the operation of the signal filter means is added.
【００１２】[0012]
【作用】請求項１の構成により、雑音低減手段の入力側
に、入力された信号から所定周波数の信号を除去して残
りの信号を雑音信号として雑音低減手段に出力する信号
フィルタ手段が設けられているため、ＦＭ放送受信用ア
ンテナがイグニションスイッチやその他の補機類等から
出力される雑音信号以外の信号である所定周波数の信号
を受信しても、該所定周波数の信号は信号フィルタ手段
によって除去されるので、雑音低減手段が所定周波数の
信号の入力を受け雑音低減信号を音響特性決定手段に出
力する事態が回避される。According to the structure of claim 1, the input side of the noise reducing means is provided with signal filter means for removing a signal of a predetermined frequency from the input signal and outputting the remaining signal as a noise signal to the noise reducing means. Therefore, even if the FM broadcast receiving antenna receives a signal of a predetermined frequency that is a signal other than a noise signal output from the ignition switch, other auxiliary equipment, etc., the signal of the predetermined frequency is processed by the signal filter means. Since the noise reduction means receives the signal of the predetermined frequency, the noise reduction means outputs the noise reduction signal to the acoustic characteristic determination means.
【００１３】請求項２の構成により、ＦＭ放送受信用ア
ンテナが所定周波数のＦＭ放送の電波を受信していない
ときには信号フィルタ手段の作動は停止されるので、上
記所定周波数の雑音が入力された場合、該雑音が信号フ
ィルタ手段によって除去され雑音低減手段に入力されな
い事態が防止される。According to the structure of the second aspect, the operation of the signal filter means is stopped when the FM broadcast receiving antenna is not receiving the radio wave of the FM broadcast of the predetermined frequency. Therefore, when the noise of the predetermined frequency is input. The situation in which the noise is removed by the signal filter means and is not input to the noise reduction means is prevented.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１は本発明の第１実施例に係る車両用受
信装置の全体構成を示すブロック図であって、同図にお
いて、１０はＦＭ放送を受信するためのＦＭ放送受信用
アンテナ、１２はＦＭ放送受信用アンテナ１０によって
受信された電波の中から希望する放送局の信号を選択し
て増幅する高周波段、１４は図示しない周波数変換回路
で中間周波数に変換された中間周波数を増幅する中間周
波段、１６はステレオ信号を左右の信号に分離するセパ
レーション設定手段、１８は周波数特性設定手段、２０
はスピーカである。FIG. 1 is a block diagram showing the overall configuration of a vehicle receiver according to a first embodiment of the present invention. In FIG. 1, 10 is an FM broadcast receiving antenna for receiving FM broadcast, and 12 is an FM broadcast receiving antenna. Is a high frequency stage that selects and amplifies a desired broadcast station signal from the radio waves received by the FM broadcast receiving antenna 10, and 14 is an intermediate frequency that amplifies the intermediate frequency converted to an intermediate frequency by a frequency conversion circuit (not shown). A frequency stage, 16 is a separation setting means for separating a stereo signal into left and right signals, 18 is a frequency characteristic setting means, 20
Is a speaker.
【００１６】同図において、２２は特定周波数の電波信
号を除去して残りの電波信号を通過させるバンドパスフ
ィルタであって、本実施例におけるバンドパスフィルタ
２２は、特定周波数の電波信号としてＦＭ多重放送の周
波数である８５．５ｋＨｚの電波信号を除去して残りの
電波信号を出力する。また、２４はマルチパス低減回路
よりなるマルチパス低減手段であって、該マルチパス低
減手段２４は、従来技術の項で説明したように８０〜１
００ｋＨｚの周波数の電波を雑音信号として受け、該雑
音信号を受けるとセパレーション設定手段１６及び周波
数特性設定手段１８に雑音低減信号を送り、雑音を低減
させる。In the figure, reference numeral 22 is a bandpass filter for removing a radio wave signal of a specific frequency and passing the rest of the radio wave signal. The bandpass filter 22 in this embodiment is an FM multiplex as a radio wave signal of a specific frequency. The radio signal of 85.5 kHz which is the frequency of broadcasting is removed and the rest of the radio signal is output. Further, 24 is a multipath reducing means composed of a multipath reducing circuit, and the multipath reducing means 24 has the functions of 80-1
A radio wave having a frequency of 00 kHz is received as a noise signal, and when the noise signal is received, a noise reduction signal is sent to the separation setting means 16 and the frequency characteristic setting means 18 to reduce noise.
【００１７】本第１実施例に係る車両用受信装置は上記
のように構成されているため、ＦＭ放送受信用アンテナ
１０がＦＭ多重放送の８５．５ｋＨｚの電波信号を受信
しても該電波信号はバンドパスフィルタ２２によって除
去されるので、該電波信号がマルチパス低減手段２４に
入力されることはない。このため、マルチパス低減手段
２４がセパレーション設定手段１６及び周波数特性設定
手段１８に雑音低減信号を出力しない。Since the vehicle receiver according to the first embodiment is configured as described above, even if the FM broadcast receiving antenna 10 receives a radio wave signal of 85.5 kHz of FM multiplex broadcast, the radio wave signal is received. Is removed by the bandpass filter 22, so that the radio signal is not input to the multipath reducing means 24. Therefore, the multipath reducing means 24 does not output the noise reduction signal to the separation setting means 16 and the frequency characteristic setting means 18.
【００１８】図２は上記第１実施例に係る車両用受信装
置の変形例を示すブロック図であって、マルチパス低減
手段２４は中間周波段１４からＦＭ多重放送の電波信号
の入力を受け、ＦＭ放送受信用アンテナ１０が所定周波
数例えば８５．５ｋＨｚのＦＭ多重放送の電波を受信し
ているときにはバンドパスフィルタ２２を作動させ、Ｆ
Ｍ放送受信用アンテナ１０が８５．５ｋＨｚのＦＭ多重
放送の電波を受信していないときにはバンドパスフィル
タ２２の作動を停止させる。FIG. 2 is a block diagram showing a modification of the vehicular receiving apparatus according to the first embodiment, in which the multipath reducing means 24 receives an FM multiplex broadcast signal from the intermediate frequency stage 14. When the FM broadcast receiving antenna 10 is receiving the radio wave of the FM multiplex broadcast having a predetermined frequency, for example, 85.5 kHz, the band pass filter 22 is operated to
When the M broadcast receiving antenna 10 is not receiving radio waves of 85.5 kHz FM multiplex broadcast, the operation of the bandpass filter 22 is stopped.
【００１９】本変形例に係る車両用受信装置は上記のよ
うに構成されているため、ＦＭ多重放送が送信されてい
ない地域又は時間帯を車両が走行しているときには、バ
ンドパスフィルタ２２の作動が停止されるので、８５．
５ｋＨｚの雑音がイグニションスイッチやその他の補機
類から出力された場合、これらの雑音信号は除去される
ことなくマルチパス低減手段２４に入力され、マルチパ
ス低減手段２４はセパレーション設定手段１６及び周波
数特性設定手段１８に雑音低減信号を出力する。従っ
て、本第２実施例においては、マルチパス低減手段２４
がＦＭ放送受信用アンテナが所定周波数のＦＭ放送の電
波を受信していないときには信号フィルタ手段の作動を
停止させるフィルタ作動停止手段を構成している。尚、
この変形例に代えて、バンドパスフィルタ２２の入力側
に上記の機能を有するフィルタ作動停止手段を設けても
よい。Since the vehicular receiving apparatus according to this modification is configured as described above, the operation of the bandpass filter 22 is performed when the vehicle is traveling in an area or a time zone in which FM multiplex broadcasting is not transmitted. Is stopped, so 85.
When noise of 5 kHz is output from the ignition switch or other auxiliary equipment, these noise signals are input to the multipath reducing means 24 without being removed, and the multipath reducing means 24 is connected to the separation setting means 16 and the frequency characteristic. The noise reduction signal is output to the setting means 18. Therefore, in the second embodiment, the multipath reducing means 24
Constitutes a filter operation stopping means for stopping the operation of the signal filter means when the FM broadcast receiving antenna does not receive the radio wave of the FM broadcast of the predetermined frequency. still,
Instead of this modification, the input side of the bandpass filter 22 may be provided with filter operation stopping means having the above-mentioned function.
【００２０】図３は本発明の第２実施例に係る車両用受
信装置の全体構成を示すブロック図であって、ＦＭ放送
受信用アンテナ１０、高周波段１２、中間周波段１４、
セパレーション設定手段１６、周波数特性設定手段１
８、スピーカ２０及びバンドパスフィルタ２２について
は第１実施例と同様の機能を有しているので説明は省略
する。FIG. 3 is a block diagram showing the overall configuration of a vehicle receiver according to the second embodiment of the present invention. The FM broadcast receiving antenna 10, high frequency stage 12, intermediate frequency stage 14,
Separation setting means 16 and frequency characteristic setting means 1
8, the speaker 20 and the bandpass filter 22 have the same functions as those in the first embodiment, and the description thereof will be omitted.
【００２１】同図に示すように、中間周波段１４とセパ
レーション設定手段１６との間には、所定の周波数より
も低い周波数の電波信号を通過させる一方、所定周波数
よりも高い周波数の電波信号を減衰させるローパスフィ
ルタ２６が設けられていると共に、第１実施例における
マルチパス低減手段２４に代えてノイズキャンセラ２８
が設けられている。ノイズキャンセラ２８は従来技術の
項で説明したように、１００〜２００ｋＨｚの周波数の
電波を雑音信号として受け、該雑音信号を受けるとロー
パスフィルタ２６に雑音低減信号を送り、雑音を低減さ
せる。As shown in the figure, a radio wave signal having a frequency lower than a predetermined frequency is passed between the intermediate frequency stage 14 and the separation setting means 16, while a radio wave signal having a frequency higher than the predetermined frequency is passed. A low-pass filter 26 for attenuating is provided, and a noise canceller 28 is used instead of the multipath reducing means 24 in the first embodiment.
Is provided. As described in the section of the prior art, the noise canceller 28 receives a radio wave having a frequency of 100 to 200 kHz as a noise signal, and when receiving the noise signal, sends a noise reduction signal to the low pass filter 26 to reduce noise.
【００２２】本第２実施例に係る車両用受信装置は上記
のように構成されているため、ＦＭ放送受信用アンテナ
１０がＦＭ多重放送の８５．５ｋＨｚの電波信号を受信
しても該電波信号はバンドパスフィルタ２２によって除
去され、該電波信号がノイズキャンセラ２８に入力され
ないので、ノイズキャンセラ２８がローパスフィルタ２
６に雑音低減信号を出力しない。Since the vehicle receiver according to the second embodiment is configured as described above, even if the FM broadcast receiving antenna 10 receives a radio wave signal of 85.5 kHz of FM multiplex broadcast, the radio wave signal is received. Is removed by the bandpass filter 22, and the radio signal is not input to the noise canceller 28.
No noise reduction signal is output to 6.
【００２３】尚、図示は省略しているが、上記第１実施
例の変形例と同様に、ノイズキャンセラ２８は、中間周
波段１４からＦＭ多重放送の電波信号の入力を受け、Ｆ
Ｍ放送受信用アンテナ１０が所定周波数例えば８５．５
ｋＨｚのＦＭ多重放送の電波を受信しているときにはバ
ンドパスフィルタ２２を作動させ、ＦＭ放送受信用アン
テナ１０が８５．５ｋＨｚのＦＭ多重放送の電波を受信
していないときにはバンドパスフィルタ２２の作動を停
止させるようにしてもよい。Although not shown, the noise canceller 28 receives the radio wave signal of the FM multiplex broadcast from the intermediate frequency stage 14 as in the modification of the first embodiment and receives the F signal.
The M broadcast receiving antenna 10 has a predetermined frequency, for example, 85.5.
The band pass filter 22 is activated when the radio wave of the FM multiplex broadcast of kHz is received, and the band pass filter 22 is activated when the antenna 10 for receiving the FM broadcast is not receiving the radio wave of the FM multiplex broadcast of 85.5 kHz. It may be stopped.
【００２４】[0024]
【発明の効果】以上説明したように、請求項１の発明に
係る車両用受信装置によると、雑音低減手段の入力側
に、入力された信号から所定周波数の信号を除去して残
りの信号を雑音信号として雑音低減手段に出力する信号
フィルタ手段を設けたため、ＦＭ放送受信用アンテナが
所定周波数の信号を信号を受信した場合、該所定周波数
の信号は信号フィルタ手段によって除去されるので、雑
音低減手段が所定周波数の信号の入力に基づき音響特性
決定手段に雑音を除去させるという誤動作を避けること
ができる。As described above, according to the vehicle receiver of the first aspect of the present invention, the input signal of the noise reduction means removes the signal of the predetermined frequency from the input signal and removes the remaining signal. Since the signal filter means for outputting to the noise reducing means as the noise signal is provided, when the FM broadcast receiving antenna receives the signal of the predetermined frequency, the signal of the predetermined frequency is removed by the signal filter means. It is possible to avoid a malfunction in which the means causes the acoustic characteristic determining means to remove noise based on the input of a signal of a predetermined frequency.
【００２５】請求項２の発明に係る車両用受信装置によ
ると、ＦＭ放送受信用アンテナが所定周波数のＦＭ放送
の電波を受信していないときには信号フィルタ手段の作
動を停止させるフィルタ作動停止手段を備えているた
め、ＦＭ放送受信用アンテナが所定周波数のＦＭ放送の
電波を受信していないときに上記所定周波数の雑音が入
力された場合、該雑音は信号フィルタ手段によって除去
されないので、音響特性決定手段は雑音を除去する。According to the second aspect of the present invention, there is provided the vehicle receiving device, which comprises the filter operation stopping means for stopping the operation of the signal filter means when the FM broadcast receiving antenna is not receiving the radio wave of the FM broadcast of the predetermined frequency. Therefore, when the noise of the predetermined frequency is input when the FM broadcast receiving antenna is not receiving the radio wave of the FM broadcast of the predetermined frequency, the noise is not removed by the signal filter means, and therefore the acoustic characteristic determining means. Removes noise.
【００２６】従って、請求項２の発明によると、所定周
波数の信号に基づき音響特性決定手段に雑音を除去させ
るという誤動作を避けることができると共に、所定周波
数のＦＭ放送が送信されていない場合には、該所定周波
数の雑音が入力された場合に音響特性決定手段は雑音を
除去することができる。Therefore, according to the second aspect of the present invention, it is possible to avoid the malfunction of causing the acoustic characteristic determining means to remove noise based on the signal of the predetermined frequency, and when the FM broadcast of the predetermined frequency is not transmitted. When the noise of the predetermined frequency is input, the acoustic characteristic determining means can remove the noise.
【図１】本発明の第１実施例に係る車両用受信装置の全
体構成を示すブロック図である。FIG. 1 is a block diagram showing an overall configuration of a vehicle receiver according to a first embodiment of the present invention.
【図２】上記第１実施例の変形例に係る車両用受信装置
の全体構成を示すブロック図である。FIG. 2 is a block diagram showing an overall configuration of a vehicle receiving device according to a modification of the first embodiment.
【図３】本発明の第２実施例に係る車両用受信装置の全
体構成を示すブロック図である。FIG. 3 is a block diagram showing an overall configuration of a vehicle receiving device according to a second embodiment of the invention.
１０ ＦＭ放送受信用アンテナ １２ 高周波段 １４ 中間周波段 １６ セパレーション設定手段 １８ 周波数特性 ２０ スピーカ ２２ バンドパス ２４ マルチパス低減手段 ２６ ローパスフィルタ ２８ ノイズキャンセラ 10 FM Broadcast Reception Antenna 12 High Frequency Stage 14 Intermediate Frequency Stage 16 Separation Setting Means 18 Frequency Characteristics 20 Speaker 22 Bandpass 24 Multipass Reduction Means 26 Low Pass Filter 28 Noise Canceller
Claims (2)
用アンテナと、該ＦＭ放送受信用アンテナにより受信し
た電波の音響特性を決定してスピーカに出力する音響特
性決定手段と、雑音信号が入力されると雑音低減信号を
上記音響特性決定手段に出力して該音響特性決定手段に
雑音を低減させる雑音低減手段とを備えた車両用受信装
置であって、上記雑音低減手段の入力側に設けられ、入
力された信号から所定周波数の信号を除去して残りの信
号を雑音信号として上記雑音低減手段に出力する信号フ
ィルタ手段を備えていることを特徴とする車両用受信装
置。1. An FM broadcast receiving antenna for receiving an FM broadcast, an acoustic characteristic determining means for determining the acoustic characteristic of a radio wave received by the FM broadcast receiving antenna and outputting it to a speaker, and a noise signal as an input. And a noise reducing means for outputting noise reduction signals to the acoustic characteristic determining means to reduce noise in the acoustic characteristic determining means, the receiving apparatus for vehicles being provided on the input side of the noise reducing means. And a signal filter means for removing a signal of a predetermined frequency from the input signal and outputting the remaining signal as a noise signal to the noise reduction means.
数のＦＭ放送の電波を受信していないときには上記信号
フィルタ手段の作動を停止させるフィルタ作動停止手段
を備えていることを特徴とする請求項１記載の車両用受
信装置。2. An FM broadcast receiving antenna is provided with a filter operation stopping means for stopping the operation of the signal filter means when the FM broadcast radio wave of a predetermined frequency is not received. The vehicle receiving device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4013994A JPH05206884A (en) | 1992-01-29 | 1992-01-29 | On-vehicle receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4013994A JPH05206884A (en) | 1992-01-29 | 1992-01-29 | On-vehicle receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05206884A true JPH05206884A (en) | 1993-08-13 |
Family
ID=11848787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4013994A Withdrawn JPH05206884A (en) | 1992-01-29 | 1992-01-29 | On-vehicle receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05206884A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9961375B2 (en) | 2015-12-09 | 2018-05-01 | Hyundai Motor Company | Method of removing common mode noise, AVN system using the method, and vehicle including the AVN system |
-
1992
- 1992-01-29 JP JP4013994A patent/JPH05206884A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9961375B2 (en) | 2015-12-09 | 2018-05-01 | Hyundai Motor Company | Method of removing common mode noise, AVN system using the method, and vehicle including the AVN system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |