KR19980019647A - Hand-free Integrated Car Stereo - Google Patents

Abstract

The present invention integrates the handfree function of a portable device with a car stereo by using a speaker for a stereo and a handfree microphone mounted on the car stereo, so that the hand free function of the portable device can be easily performed through the car stereo. A sound generating apparatus, a hand free means for hand-free call operation of a portable apparatus, switching means for selectively switching outputs of the sound generating apparatus and a hand free means, a hand free function and / or sound An output selecting means for selecting an output method of the output means, a hand-free microphone for converting the voice transmission signal into an electrical signal, and a microphone for compensating the output frequency of the hand-free microphone to the hand-free means. Equalization means and transmission / reception of input and output to the hand-free means And a microcomputer for controlling the switching means according to the output signal of the output selecting means, attenuation means for reducing the output of the sound generating device to a predetermined level, output of the attenuation means and output of the hand free means. Mixing means for mixing, equalizing means for compensating the frequency characteristics of the voice reception signal of the sound generating apparatus and / or the handfree, amplifying means for amplifying the output from the equalizing means to a desired gain, and the amplifying And sound / audio output means for outputting the amplified sound and / or the voice signal by the means.

Description

Hand-free Integrated Car Stereo

The present invention integrates the handfree function of a portable device into a car stereo by using a speaker for the stereo and a handfree microphone mounted on the stereo, so that the hand free function of the portable device can be easily performed through the car stereo. It is about.

1A and 1B are block diagrams for explaining a hand free function in a conventional wireless telephone. Referring to FIG. 1A, a portable device has a transmission path leading to a microphone 107, an audio transmitter 106, an RF transmitter 105, and an antenna 101, and the RF receiver 102 and the audio receiver from the antenna 101. And a reception path leading to the 103 and the speaker 104, and including a control unit 108 for controlling the transmission / reception operation.

Referring to FIG. 1B, the fixing device includes a call circuit unit 24 connected to telephone lines L1 and L2, an audio transmitter 126, an RF transmission unit 125, and a reception path leading to the antenna 21. A receiving path from 121 to an RF receiver 122, an audio receiver 123, and a call circuit 124; and a control unit 128 for controlling the transmission / reception operation, and the RF receiver 122 And a speaker phone circuit unit 131 and a speaker connected to the audio receiver 123 and the RF transmitter 125 and the audio transmitter 126 to be interlocked to perform a hands-free function according to the switching state. It is configured to select the hand-free means 130 consisting of 132 and the microphone 133.

The handset operation by the conventional portable device configured as described above is performed as follows. First, during a trunk line call in a portable device, a voice signal is converted into an electrical signal by a microphone of the portable device to obtain the gain and frequency characteristics required by the audio transmitter, and the modulated RF signal is amplified by an antenna. Sent to the fixture side. At this time, the modulated signal received through the antenna of the fixed device is detected by the RF receiver, and the necessary gain and frequency characteristics are obtained from the audio receiver through a switch and is transmitted from the call circuit unit to the telephone line.

In the sign language path, the signal coming into the telephone line is amplified by the audio transmitter through the call circuit of the fixed device, modulated by the RF transmitter, and transmitted to the portable device through the antenna, and the modulation received through the antenna of the portable device. The signal is detected by the RF signal and then amplified by the audio receiver to drive the speaker.

On the other hand, in the fixed device, the switching terminal of the analog switch, which is connected between the RF transmitter / receiver and the audio transmitter / receiver, is connected to the hand-free means to switch the transmission / reception path. After the voice signal input into the electrical signal is converted into an electrical signal, the speaker phone circuit unit and the audio receiver unit are amplified and transmitted to the telephone line through the call circuit unit. It is input to the circuit unit to drive the speaker.

In addition, referring to FIG. 2, the basic configuration of a conventional stereo is composed of a radio receiver 202 connected to an antenna 201, a cassette player (CP) 203, and a compact disc player (CDP) 204. Selects an acoustic generator, an output selector 205 for selecting one of the acoustic generators, a switching means 206 for switching one of the acoustic generators, and an output selector 205 Equalizing means 207 for compensating for deterioration of voice frequency characteristics of the microcomputer 210 for controlling the switching means 206 and the sound generating means selected by the switching means 206 according to the signal, and equalizing means ( Amplification means 208 for amplifying the output of the sound wave 207 to an appropriate level, and sound output means 209 for outputting the amplified sound signal.

However, the conventional hand-free speaker is included in the speaker box together with the hand-free means, and since the hand-free is not listening to the other party's voice with the handset but listening to the speaker with the hand off the handset, a separate loud speaker must be provided. When the speaker box is placed in the car, it takes up a lot of space, and the hands-free call operation as described above is limited to the fixed device, so when the user is away from the fixed device and uses the mobile device on the charger or when the user is carrying the mobile device. There was a problem that you cannot make a hand-free call.

On the other hand, the present invention, while using a car stereo speaker of the car, is installed on a predetermined portion of the operation display pattern of the micro car stereo for hand-free transmission, the hand-free means of the portable device in the car stereo, the speaker and the microphone for hand-free The idea is to make hand-free calling easier.

The present invention has been made in view of the above, and by using the car stereo speaker and the hand free microphone mounted on the car stereo, the hand free function of the mobile device is integrated with the car stereo, thereby simplifying the hand free function of the mobile device through the car stereo. It is an object of the present invention to provide a handfree integrated car stereo that can be performed.

The hand-free integrated car stereo according to the present invention for achieving the above object selectively switches the sound generating device, the hand free means for hand-free call operation of the portable device, and the output of the sound generating device and the hand free means. A switching means for switching, an output selecting means for selecting an output method of a hand free function and / or a sound output means, a hand free microphone for converting the voice transmission signal into an electrical signal, and the hand free microphone A microphone equalization means for compensating an output frequency of the output signal to a hand-free means, a microcomputer for controlling the switching means according to a transmission / reception signal input to / from the hand-free means and an output signal of the output switching unit, Attenuation means for reducing the output to a predetermined level, the output of the attenuation means and the hand free means Mixing means for mixing the power, equalization means for compensating for the frequency characteristics of the voice reception signal of the sound generating apparatus and / or the hands-free signal, amplifying means for amplifying the output from the equalizing means to a desired gain, and And a sound / voice output means for outputting the sound and / or the voice signal amplified by the amplification means.

In addition, the hand-free integrated car stereo having the above-described configuration is provided with a connector assembly for electrically connecting the hand-free means and the portable device, and the jack for the ion phone and the hand-free calling on a predetermined portion of the operation display panel of the car stereo for secret calls. The microphone is installed. In addition to the above-described hand free integrated car stereo, the charging means of the portable device may be incorporated in the car stereo to be integrated.

1A and 1B are block diagrams for explaining a hand free function in a conventional wireless telephone;

2 is a block diagram schematically showing a conventional car stereo configuration;

3 is a schematic front view of a hand free integrated car stereo according to the present invention;

4 is a block circuit diagram of a hand-free integrated car stereo according to the present invention;

5 is a flowchart illustrating an example of an operation process of the hands-free integrated stereo of the present invention.

* Description of the symbols for the main parts of the drawings *

101,121,201,401: Antenna 102: RF receiver

103: Audio receiver 104,132,404: Speaker

105: RF transmitter 106: audio transmitter

107,133,301,424: Mic 108,128,210,427: Miccom

124: call circuit unit 130, 423: hand-free means

131: speaker phone circuit unit 202, 411: radio receiver

203, 412: cassette player 204, 413: compact disc player

205, 426: output selection means 206, 431: switching means

207,402: lighting means 208, 403: amplification means

300: The car stereo body 302: Earphone jack

303: control unit 304: connector window

305: display panel 306: connector assembly

307: holder 308, 420: portable device

410: sound generating device 422: charging means

425: microphone equalization means 432: attenuation means

433: mixing means

Hereinafter, with reference to the accompanying drawings will be described in more detail a hand-free integrated car stereo according to the present invention.

Figure 3 is a view showing a schematic front structure of a hand-free integrated car stereo according to the present invention. As shown in the drawing, a female connector 304 is formed at a predetermined portion of the front surface of the operation display panel of the stereo to connect the hand-free means and the portable device built in the stereo, and the male connector corresponding to the female connector 304. The connector assembly 306 connected to the holder 307 of the portable device 308 is connected to the female connector. In addition, an earphone jack and a hand-free microphone 301 are provided at predetermined portions of the operation display panel of the car stereo for a secret passage. Reference numeral 300 denotes a stereo, 303 an operator panel, and 305 a display panel.

4 is a block circuit diagram of a handfree integrated car stereo according to the present invention. Referring to this figure, the sound generator 410 for a stereo is composed of a conventional radio receiver 411, a cassette player 412, a compact disc player 413, etc., which can be used on the front of the operation display panel of the stereo. And a hand-free means 423 for transmitting or outputting a voice signal to and from the portable device 420 so as to perform a hand-free call operation, and the sound generating device 410 and the hand-free means ( Switching means 431 for selectively switching the output of the 423, and output selection means 426 for selecting the output method of the hand-free function and / or sound output means. The output selection means 426 consists of operation buttons (not shown) of the operation display panel of the car stereo. Each operation button can be set to various output methods, such as hand-free voice output, hand-free voice and sound mixed output, and the like.

In addition, the hand-free means for compensating the output frequency of the hand-free microphone 424 and the hand-free microphone provided on a predetermined front surface of the operation display panel of the car stereo to convert the voice signal for the call into an electrical signal. A microphone equalizing means 425 for outputting the signal to the microphone, attenuating means 432 for reducing the output of the sound generating apparatus 410 to a predetermined level, and an output of the attenuating means 432 and an output of the hand free means. Control the switching means 431 and the attenuation means 432 according to the mixing means 433 for mixing, the transmission and reception signal input and output to the hand-free means 423 and the selection signal of the output selection means 426. For amplifying the output from the equalizing means 402 and the equalizing means 402 to a desired gain; It is made by having the amplification means 403 and a sound / audio output means 404 for the sound and / or outputs the audio signal amplified by the amplification means 403.

In addition, the charging means 422 of the portable device, which is composed of a voltage drop circuit and an overcharge preventing circuit, may be integrated into the car stereo, separately from the hand free integrated car stereo having the above-described configuration. The voltage drop circuit is a voltage drop circuit designed for a charging voltage (6 V or 4.5 V) of a portable device connected to a battery power source (12 V) of a car stereo or an automobile, and the output voltage of the voltage drop circuit in the overcharge protection circuit. It is designed to cut the charging path during overcharging by comparing the battery voltage of the portable device with the battery voltage.

An example of the operation of the hands-free integrated stereo of the present invention as described above will be described with reference to FIG. FIG. 5 illustrates an example in which a mixed mode and a hand free communication mode for mixing and outputting a voice signal for a call and attenuated sound signals through an output selection unit are selected (S1). First, any one of the sound generating apparatuses consisting of a radio receiver, a cassette player and a compact disc player is operated to output sound through a sound / audio output means, that is, a stereo speaker. If it is determined (S2) that there is a voice signal for the call, the microcomputer switches the switching means to switch it to the hand-free call mode and also selects the hand-free means (S3). If there is no transmission / reception of the voice signal for a call, the output of the sound / voice output means will continue to output only the sound signal output from the initially selected sound generator without change (S10). When the voice signal is input to the hand-free means as described above, the control unit simultaneously switches the hand-free means to be connected to the sound reproducing apparatus (S3) and simultaneously attenuates the sound signal output from any one of the sound generating apparatuses. After attenuating to an appropriate level set in advance (S4), the microcomputer determines whether the voice signal is a transmission or reception signal (S5), and if the voice signal input to the hand-free device is a reception signal, the hand-free means. In operation S6, the audio signal output from the audio signal is mixed with one of the audio signals attenuated to the appropriate level. Subsequently, the frequency characteristics of the deteriorated sound and / or audio signal are compensated while passing through the attenuation means and the mixing means, and the output from the equalizing means is amplified to a desired gain (S7), and then the mixing amplified by the amplifying means is performed. The signal is output to the sound / voice output means, that is, the speaker of the stereo (S8). Next, the microcomputer determines whether the waiting time for hand-free transmission / reception signal that is appropriately set is exceeded (S9). If the waiting time is exceeded, the microcomputer controls the switching means to open the hand-free means and disables the attenuation means. Only the sound signal of the selected sound output means is output to the speaker of the stereo (S10), and if it is within the preset waiting time, the procedure of repeating the above procedure is repeated by checking the transmission / reception state of the hand-free voice signal.

On the other hand, when a transmission signal is input through the hand-free microphone, the microcomputer switches the transmission signal of the hand-free means to be transmitted to the transmitting end of the portable device (S11), and in this case, the microcomputer is suitably preset hand. It is determined whether the pre-transmission / reception signal waiting time is exceeded (S9). If the waiting time is exceeded, the switching means is controlled to open the hand-free means and disable the attenuation means, so that only the acoustic signal of the first sound output means is selected. In step S10, if it is within a predetermined waiting time, the hand-free voice signal and the state of transmission and reception are continuously checked, and the above process is repeated.

As described above, according to the hand-free integrated car stereo according to the present invention, the portable device is integrated by integrating the hand-free function of the portable device into the car stereo by using the speaker for the stereo and the hand-free microphone mounted on a predetermined portion of the operation display panel of the car stereo. The audio output can be received through the speaker for car stereo, and the hand-free microphone mounted on the car stereo can be used to easily carry out the hand free function of the portable device and to reduce the size of the portable device. have.

Claims (5)

An acoustic generator, hand-free means for hand-free call operation of a portable device, switching means for selectively switching outputs of the acoustic generator and hand-free means, output of a hand-free function and / or sound output means An output selecting means for selecting a method, a hand-free microphone for converting the voice transmission signal into an electrical signal, a microphone equalizing means for compensating the output frequency of the hand-free microphone and outputting the hand-free means; A microcomputer for controlling the switching means according to the transmission / reception signal input and output to the hand-free means and the output signal of the output selection means, attenuation means for reducing the output of the sound generating device to a predetermined level, and the attenuation means. Mixing means for mixing the output of the hand free means and the output of the sound generating apparatus and / or Equalizing means for compensating the frequency characteristics of the sexually received signal, amplifying means for amplifying the output from the equalizing means with a desired gain, and sound / voice output means for outputting the amplified sound and / or a voice signal by the amplifying means; Hand free integrated car stereo, characterized in that made. The hand-free integrated car stereo of claim 1, further comprising a connector assembly for electrically connecting the hand-free means and the portable device. The hand-free integrated car stereo of claim 1, wherein the sound / audio output means is a stereo speaker. The hand-free integrated car stereo of claim 1, further comprising a charging means for a portable device including a voltage drop circuit and an overcharge preventing circuit in the hand-free integrated car stereo. The handfree according to claim 1, wherein an earphone jack for outputting a sound and / or voice signal amplified by the amplifying means to the earphone for making a secret call is provided in a predetermined portion of the operation display panel of the stereo. Integral car stereo.