JPH0233224A - On-vehicle audio equipment - Google Patents

Abstract

PURPOSE:To prevent recording of undesired commentary and to avoid hard of hearing at reproduction by providing a fade-in and fade-out function to a recording equalizer circuit. CONSTITUTION:In the case of recording an AM.FM broadcast, a signal selection control means 10 selects a signal from an AM front end 2 or an FM front end 3 and sends the signal to a recording equalizer circuit 7. The circuit 7 adjusts the signal so as to be subject to fade-in and fade-out recording, the resulting signal is fed to a recording head 12a and the broadcast content during the reception is subject to fade-in and fade-out recording by a head section 12. In the case of reproducing a tape, the signal selection control means 10 selects the audio signal from a head amplifier 6 and a signal from a reproduction equalizer circuit 8 and the audio signal is outputted simultaneously from speakers 13, 14 and 15. Thus, the recording of undesired commentary is avoided and hard of hearing at reproduction is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle-mounted audio device, and more particularly to a vehicle-mounted audio device equipped with a recording function.

[Prior Art] This type of in-vehicle audio device (car radio, car stereo, etc.) is usually installed in small passenger cars of the upper class or above. This is an ordinary car stereo (one that only plays back the recorded content on tape) with the added function of recording FM-AM broadcasts on tape.While listening to FM broadcasts, you can listen to the broadcast content by switching on the switch. It is now easy to record.

[Problem to be solved by the invention] However, in the above conventional example, the recording switch "
Since it is recorded at a practical input level at the same time as "On",
For example, when recording music, unnecessary commentary is often recorded, making the content difficult to listen to when played back.

Furthermore, conventionally, most in-vehicle audio devices have been of the so-called stereo type, and have been very expensive.

[Purpose of the invention]

An object of the present invention is to improve the disadvantages of the conventional example, and in particular, to effectively prevent unnecessary commentary etc. from being recorded when recording music broadcasts, thereby eliminating the difficulty of listening during playback. It is an object of the present invention to provide an in-vehicle audio device that can be obtained at low cost and that can be used at low cost.

[Means to solve the problem]

The present invention includes a receiving antenna for FM and AM waves, an AM detection means for detecting the AM modulated wave received by the antenna and converting it into an audio signal, and a receiving antenna for FM and AM waves received by the receiving antenna.
FM detection means that detects the M modulated wave and converts it into an audio signal; a recording equalizer circuit that adjusts the audio signal output from both detection means as necessary and supplies it to the recording head; and a recording equalizer circuit that adjusts the signal from the playback head. a reproduction equalizer circuit, and a 1st. and second and third speakers. Three speakers are arranged in a triangular shape at the front and rear of the vehicle, and a recording equalizer circuit has fade-in and fade-out functions. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 3.

The embodiment shown in FIG. 1 includes an antenna 1 for receiving and transmitting FM and AM waves, and an A as an AM detection means for detecting an AM modulated wave received by the antenna 1 and converting it into an audio signal.
An FM front end 2, an FM front end 3 serving as an FM detection means for detecting an FM modulated wave received by the antenna 1 and converting it into an audio signal, and an AM front end 2.
FM front end 3 and signal selection control means 1 to be described later
AF amplifier 4 that amplifies the audio signal from A
A power amplifier 5 that further amplifies the output signal from the F amplifier 4, and a front speaker 13 as a first speaker disposed at the output stage of the power amplifier 5. Left speaker 14 as second speaker. and a light speaker 15 as a third speaker.

Of these, the front speaker 13 is actually installed in front of the instrument panel of the vehicle, the left speaker 14 is installed on the left side behind the rear seat of the vehicle, and the right speaker 15 is installed on the right side of the rear seat of the vehicle. A panoramic sound system is formed.

The signal selection control means 10 selects the AM front end 2 according to an output signal from a key switch control unit (hereinafter referred to as "control unit") 17, which will be described later.
．． A first control function selects a signal from the FM front end 3 and sends it to a recording equalizer circuit 7 (described later), and selects and records an amplified audio signal input to the head amplifier 6 from a wire and wireless microphone 9 (described later). a second control function that sends the signal to the AF equalizer circuit 7; a third control function that selects the audio signal from the head amplifier 6 and sends this signal to the AF amplifier 4; A fourth control function that selects a signal and sends it to the AF amplifier 4, and an AM front end 2. It has a fifth control function of selecting a signal from the FM front end 3 and outputting it to the AP amplifier 4.

The head amplifier 6 amplifies an audio signal generated from a wire and wireless microphone 9, which will be described later, to an appropriate gain and outputs it to the FM transmitter 16 and signal selection control means 10.

The recording equalizer circuit 7 adjusts the signal from the signal selection control means 10 and supplies it to the recording head 12a of the head unit 12. In addition, this recording equalizer circuit 7 has a fade-in/fade-out function that adjusts the signal so that recording is automatically performed with fade-in (Fl) and fade-out (FO). The fade in/fade out function is now cancelled.

The reproduction equalizer circuit 8 adjusts the signal from the reproduction head 12b of the head section 12 and sends it to the signal selection control means 10.

The wire and wireless microphone 9 is of a so-called plug-in type, and actually has an audio input section 9a, as shown in FIG.
FM) Transmitter 9b, preamplifier 9c, battery 9
d and a rod antenna 9e, it is detachable and stored in the vehicle, and by removing it, it becomes a hand-type wireless microphone that can be easily taken out of the vehicle (see Figure 3). . This wire and wireless microphone 9 is actually installed in a vehicle via a flexible arm 50, as shown in FIG.

Furthermore, an FM transmitter 16 is disposed at the output stage of the head amplifier 6, and outputs the audio signal output from the head amplifier 6 from the antenna 1 as an FM modulated wave.

The control unit 17 includes a switch 18 for recording while listening to AM-FM broadcasting, and a switch 19 for recording from the wire and wireless microphone 9. FM
Transmission switch 20. A switch 21 for tape playback and microphone mixing is provided with a switch 22 for AM-FM radio and microphone mixing, and receives signals from each of these switches 18 to 22, and selects and controls control signals according to the signals. It is sent to means 10.

Next, the overall operation of the above embodiment will be explained.

First, in order to record the contents of an AM-FM broadcast while listening to it, turn on the switch 18 attached to the control unit 17.
The first control function of the signal selection control means 10 operates according to the control signal from the AM front end 2 or the FM
The signal from the front end 3 is selected and sent to the recording equalizer circuit 7. The recording equalizer circuit 7 adjusts this signal so that it is recorded in a fade-in/fade-out manner and supplies it to the recording head 12a, whereby the broadcast content being received is recorded by the head section 12 in a fade-in/fade-out manner. .

To record using the wire and wireless microphone 9, press the switch 19 attached to the control unit 17.
When turned on, the second control function of the signal selection control means 10 is activated by the control signal from the control unit 17 to select the amplified audio signal input from the wire and wireless microphone 9 to the head amplifier 6 and record it. The signal is sent to the equalizer circuit 7 for use. In this case, the cancel switch 7a attached to the recording equalizer circuit 7 is turned on at the same time as the switch 19 is turned on in conjunction with the switch 19, and the fade-in fade-out function of the recording equalizer circuit 7 is canceled. Therefore, the switch 19' is connected from the recording equalizer circuit 7 to the recording head 12a.
At the same time as "On", the microphone input content is recorded at a practical input level.

To communicate with other vehicles using the wire and wireless microphone 9, turn on the switch 20 attached to the control unit 17.
The control function works and the amplified audio signal input from the wire and wireless microphone 9 to the head amplifier 6 is AFed.
Sent to amplifier 4 and finally to speakers 13, 14, 15
Audio is output from. In this case, an audio signal is also output from the head amplifier 6 to the FM transmitter 16, and this audio signal is FM-modulated by the FM transmitter 16 and output from the antenna 1. In this way, transmission is performed to other vehicles, and reception is performed by antenna 1. This is done via the FM front end 3 or the like.

To perform tape playback and microphone mixing, when the switch 21 attached to the control unit is turned on, the third and fourth control functions of the signal selection control means 10 are activated simultaneously by the control signal from the control unit 17. The audio signal from the head amplifier 6 and the signal from the reproduction equalizer circuit 8 are selected and simultaneously output to the AF amplifier 4, and finally the audio signals are simultaneously output from the speakers 13, 14, and 15. In this way, tape playback and microphone mixing are performed.

To perform AM-FM radio and microphone mixing, when the switch 22 attached to the control unit 17 is turned on, the control signal from the control unit 17 causes the third. A fifth control function simultaneously operates the AM front end 2. The audio signal from the FM front end 3 and the audio signal from the head amplifier 6 are selected and output simultaneously to the AF amplifier 4, and finally the audio signals are output from the speakers 13, 14, and 15.

In this way, AM-FM radio and microphone mixing is performed.

As explained above, according to the first embodiment, AM-FM broadcasting can be recorded with fade-in/fade-out, so when recording music, for example, the inconvenience that a part of unnecessary commentary is recorded can be effectively avoided. can be avoided,
This has the advantage that it is possible to effectively reduce the difficulty in listening to the recorded content during playback. Furthermore, since the audio amplifier circuit is monaural, the circuit configuration is simpler than that of the conventional stereo system, and there are advantages in that maintenance can be improved and costs can be significantly reduced.

Furthermore, the wire and wireless microphone 9 can be used to communicate with other vehicles, and if the wire and wireless microphone 9 is used as a wireless microphone, wireless communication from outside the vehicle is possible, and during tape playback and AM-FM radio broadcasting. It has the advantage of allowing microphone mixing during reception and allowing for karaoke practice.

[Second Embodiment] Next, a second embodiment of the present invention will be explained based on FIG. 4 and FIG. It is used, and its explanation is omitted or simplified.

The embodiment shown in FIG. 4 includes an antenna 1, a second AM radio as an AM detection means, an FM radio 3 as an FM detection means, and the output signals from the second AM radio and the FM radio 3 are amplified. It is equipped with an amplifier 5 for

Antenna L and AM U, Ji 2nd. A mixer 51 is provided between the third FM radio and the third FM radio to frequency-convert the radio waves received by the antenna 1 and output them as an intermediate frequency.

The output signal of this mixer 51 is also sent to a Z-wave receiving circuit 31 as a transmission signal receiving circuit.

A Z-wave detection circuit 32 as a transmission signal detection circuit is disposed at the output stage of the Z-wave reception circuit 31, and a Z-wave detection lamp 32a is also provided to this Z-wave detection circuit 32.

The Z-wave detection circuit 32 turns on the second AM radio after the Z-wave detection lamp 32a is turned on for a certain period of time, for example, 5 seconds. It has a function of muting each audio signal output from the third FM radio and a cassette tape recorder 33 to be described later.

A signal from a wire and wireless microphone 35 composed of a wireless microphone 9 and a wired microphone 34 is input to the mixer 51, and is output from the antenna 1 as an FM modulated wave. The wireless microphone 9 is configured in the same manner as the wire and wireless microphone of the first embodiment described above, and can perform transmission even if it is separated from the wired microphone 34.

The output signal of the wired microphone 34 is sent to the recording equalizer circuit 7 via the microphone recording switch 19, and is sent to the playback/mixing circuit 35 via the playback mixing switch 21.

The recording equalizer circuit 7 amplifies the signal from the wired microphone 34 or the signal switching means 36 and supplies it to a recording/reproducing head (not shown) of the cassette tape recorder 33.

The recording equalizer circuit 7 has a fade-in/fade-out function, and is also provided with a cancel switch 7a. The cancel switch 7a is turned on simultaneously in conjunction with the microphone recording switch 19.

A signal from a recording/playback head (not shown) of the cassette tape recorder 33 is sent to a playback mixing circuit 35 having a playback equalizer circuit, adjusted by the playback mixing circuit 35, and output to the amplifier 5, where it is amplified and finalized. The sound is output from the speakers 13°14.15.

Other configurations are similar to those of the first embodiment described above.

Here, based on FIG. 5, the inter-vehicle communication priority operation of the second embodiment will be explained.

First of all, AM Radio 2nd. FM Radio 3rd. Turn each switch for recording and playback of the cassette tape recorder 33 as necessary.
"on" (step 5lO1).

Next, a control section (not shown) sends a Z wave (
That is, it is determined whether there is an input signal (transmission signal from a wireless microphone of another vehicle) (S102).

If two waves are input, the next stage Z-detected circuit 32 is caused to send out a Z-wave reception signal. Z detected circuit 32
Then, when this Z-wave reception signal is detected, the Z-detected lamp 32a attached thereto is turned on (S103).

If there is no Z input, the control unit (not shown) determines that there is no transmission signal from another vehicle and maintains the current state (3104
).

In the Z liquid detection lamp 32a lighting state (S103),
A control unit (not shown) determines whether a reception cancel switch (not shown) is in the "on" state (3105).

Then, if the reception cancel switch is in the "on" state, it is determined whether or not there is a vehicle-to-vehicle communication state (5106).
, if there is no vehicle-to-vehicle communication status, maintain the current status 5104
), if the vehicle is in the vehicle-to-vehicle communication state, the process returns to the previous step 5105 (S107).

On the other hand, when the reception cancel switch is not in the "on" state, the control section (not shown) turns on the Z detected lamp 32a.
It is determined whether or not the light has been lit for 5 seconds (310B).

If the Z detection lamp 32a is not lit for 5 seconds,
Returning to the previous step, it is determined whether the reception cancel switch is "on" (S105).

When the Z detection lamp 32a is lit for 5 seconds, it is determined that there is a signal transmitted from another vehicle, and the control unit (not shown)
From the Z detected circuit 32, the second AM radio, the third FM radio. The cassette tape recorder 33 sends out a mute signal to mute each audio output. FM
Raji 3rd. And the audio of the cassette tape recorder 33 is muted (S109).

Thereafter, the FM radio circuit detects Z waves (transmission signals from other vehicles) (3110), confirms the transmission content, and enters an inter-vehicle transmission state in order to respond (S111).

As explained above, in this second embodiment, communication signals from other cars can be received preferentially by the wireless microphone, and communication from the other party can be received even when listening to the radio, cassette, etc. In addition to having excellent advantages, it is possible to obtain functions and effects that are generally similar to those of the first embodiment described above.

〔Effect of the invention〕

Since the present invention is configured and functions as described above, according to the present invention, even when the recording switch is set to "on" due to the fade-in/fade-out function of the recording equalizer circuit, recording is immediately performed at a practical input level, unlike in the past. It can automatically perform fade-in/fade-out recording, effectively preventing unnecessary commentary from being recorded when recording music, etc., and effectively recording the intro and ending of a song. Since the three speakers are arranged in a triangular shape to form a panoramic sound system, sufficient sound effects can be obtained even if the audio amplifier circuit is monaural, and it can be obtained at a low price. It is possible to provide an excellent in-vehicle audio device that has never existed before.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention,
FIG. 2 is a block diagram showing the configuration of the wire and wireless microphone of FIG. 1, FIG. 3 is an explanatory diagram showing the mounting position of the audio device according to the embodiment of FIG. 1, and FIG. FIG. 5 is a block diagram showing the configuration of the embodiment, and FIG. 5 is a flowchart showing the inter-vehicle communication priority operation of the embodiment of FIG. ■...Antenna, 2...AM front end as AM detection means, 3...FM front end as FM detection means, 7...For recording Equalizer circuit, 8... Reproduction equalizer circuit, 13... Front speaker as first speaker 5.14... Left speaker as second speaker, 15. . . . Light speaker as a third speaker, 31 . . . Z wave receiving circuit as a transmission signal receiving circuit, 32 . . . Z detected circuit as a transmission signal detection circuit.

Claims (2)

[Claims] (1) A receiving antenna for FM and AM waves, an AM detection means for detecting the AM modulated wave received by this antenna and converting it into an audio signal, and a receiving antenna for FM and AM waves received by the receiving antenna.
FM detection means for detecting the M modulated wave and converting it into an audio signal; a recording equalizer circuit that adjusts the audio signal output from both of the detection means as necessary and supplying it to the recording head; comprising a reproduction equalizer circuit for adjustment, and first, second, and third speakers for finally outputting each signal outputted from the AM detection means, FM detection means, and reproduction equalizer circuit as audio, An in-vehicle audio device characterized in that two speakers are arranged in a triangular shape at the front and rear of the vehicle, and the recording equalizer circuit has a fade-in and fade-out function. (2) An antenna for FM-AM wave reception and FM wave transmission, an AM detection means for detecting the AM modulated wave received by this antenna and converting it into an audio signal, and detecting the FM modulated wave received by the receiving antenna. FM detection means for converting the signal into an audio signal; a recording equalizer circuit that adjusts the audio signal output from both of the detection means as necessary and supplies it to the recording head; and a playback equalizer that adjusts the signal from the playback head. circuit, the AM detection means, FM
First, second, and third speakers for finally audio outputting the output signal from the detection means and the reproduction equalizer circuit, and a transmission signal for receiving a transmission signal from another vehicle is provided at the output stage of the antenna. A reception circuit and a transmission signal detection circuit that sends a mute signal to the AM detection means, FM detection means, and reproduction equalizer circuit when the transmission signal is detected for a certain period of time are installed together, and the three speakers are connected to the vehicle. An in-vehicle audio device characterized in that the recording equalizer circuit is arranged in a triangular shape at the front and rear, and has a fade-in/fade-out function.