KR19990085349A - Car Audio Hand-free Recording Device - Google Patents

Abstract

The present invention relates to car audio and is a car audio having a built-in hand free kit. Here, the handfree key is a device that allows a user to make a call using a microphone and a speaker without having to hold a mobile phone in the driver's ear by hand. In addition, it also has a built-in device that can record the contents of mobile phone calls in the car. In other words, the present invention connects a mobile phone to an existing car audio, and can make a call using a car audio speaker and a microphone without directly attaching the mobile phone to the ear. It was to be able to record.

As described above, the present invention provides a mobile phone connection jack that enables input / output of a voice signal and a microphone voice signal output from the mobile phone, and charging of the mobile phone; A signal adder for adding the voice signal of the microphone and the voice signal input through the mobile phone connection jack; An analog-digital converter for receiving the added analog signal and converting the digital signal into digital data; A memory for storing the converted digital data; An address generator which designates an address for storing data in the memory; In memory speech reproduction, a digital-analog converter is provided which receives data from the memory and converts the data back into an analog audio signal.

In addition, a signal level detector for determining whether there is a voice signal input from the mobile phone to give information to the system control unit; A system control unit for controlling other means according to information on whether there is an audio signal from the signal level detector and a function designated by the function selection unit; It is characterized by consisting of a selection switch for selecting a signal to be reproduced and a signal to be recorded on the tape under the control of the system controller.

Finally, the charging unit for receiving power from the car audio power supply unit to charge the battery of the mobile phone through the mobile phone connection jack is also included in the configuration of the present invention.

Description

Car Audio Handfree Recording Device

The present invention relates to a car audio with a built-in hand-free function of a mobile phone, the user can freely talk using a car audio speaker and a microphone without having to hold the mobile phone directly to his or her ear when making a call in the car, and recording to the car audio. It is about a car audio device that adds a function to record important memos or calls.

The conventional hand free kit has the following problems.

-It is very complicated to install microphones, speakers, and charging kits when installing in a car.

-You can't record important notes or notes during the call. That is, in order to take notes while driving, it is inconvenient to stop a car or the like.

-If you receive a call while listening to the car audio, you may have inconvenience such as turning off the car audio or turning down the volume.

Therefore, the present invention is to improve the problems of the prior art described above, when a call is made while driving a car with a built-in microphone and a speaker connected to a car audio and a mobile phone using a speaker of a conventional car audio. An object of the present invention is to provide a device for conveniently making a call without other operations such as reducing the audio volume.

Another object of the present invention is to provide a function for recording a memo with a simple operation while driving by using the call content recording function of car audio when it is necessary to take note of important contents during a call.

Another object of the present invention is to enable users who have only existing mobile phones to purchase the expensive hand-free kit separately and cope with all of the hand-free functions using the car audio of the present invention without complicated installation. .

Car audio hand-free recording device for achieving the above object of the present invention has a mobile phone connection jack and a connection cable that can connect a mobile phone to the existing car audio, a microphone and a function key to record the driver's voice input It is characterized by the addition.

As described above, the present invention provides a mobile phone connection jack that enables input / output of a voice signal and a microphone voice signal output from the mobile phone, and charging of the mobile phone; A signal adder for adding the voice signal of the microphone and the voice signal input through the mobile phone connection jack; An analog-digital converter for receiving the added analog signal and converting the digital signal into digital data; A memory for storing the converted digital data; An address generator which designates an address for storing data in the memory; It is characterized in that it comprises a digital-analog converting unit for receiving data from the memory and converting it back into an analog audio signal at the time of memory voice reproduction.

In addition, a signal level detector for determining whether there is a voice signal input from the mobile phone to give information to the system control unit; A system control unit for controlling other means according to information on whether there is a voice signal from the signal level detection unit and a function designated by the function selection unit; A reproduction selection switch for selecting a signal to be reproduced under control from the system controller; And a recording select switch for selecting a signal to be recorded on the tape.

Finally, the charging unit for receiving power from the car audio power supply unit to charge the battery of the mobile phone through the mobile phone connection jack is also included in the configuration of the present invention.

1 is a system configuration of a car audio hand-free recording device according to the present invention.

2 is a block diagram of a car audio hand-free recording device according to the present invention.

3 is an operation table of the control signal for each function according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: mobile phone 200: handfree car audio

210: microphone or microphone jack 220: mobile phone connection jack

230: volume control 240: audio tape deck

250: display unit 260: function selection unit

270: speaker 280: signal adder

290: analog-to-digital converter 300: memory

310: digital-analog converter 320: signal level detector

330: address generator 340: system controller

350: recording selection switch 360: playback selection switch

370: signal amplifier 380: live part

400: Car audio-phone connection cable 500: Audio tape

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a system configuration of a car audio hand-free recording device according to an embodiment of the present invention, as shown in the car audio (200, hereinafter referred to as car audio) with a hand-free recording function; Cell phone (100); And, consisting of a connection cable 400 for connecting the car audio and the mobile phone. The car audio may include a microphone 210 or a microphone input jack to receive a voice of a driver or a passenger; A mobile phone connection jack 220 for receiving a voice signal of a mobile phone and outputting a voice signal and charging power of a car audio microphone; A tape deck 240 capable of playing and recording tapes; A display unit 250 showing a current function state; A function selection unit 260 for operating a desired function; A speaker 270 for reproducing voice and audio signals; It is composed of a volume controller 230 to adjust the playback volume.

The operation of the present invention is first connected to the input and output connector of the mobile phone, the other side to the mobile phone connection jack of the car audio as shown in FIG.

In this embodiment, each of the following seven functions will be described.

1) Playback of regular audio tapes

When the tape is inserted into the inlet of the tape deck 240 and the play key 262 is selected, the audio recorded on the tape is played through the speaker in the vehicle. This can be done without a call, and as will be explained later, the audio will automatically stop playing when the phone call starts.

2) Play voice through speaker when talking on cell phone

If the car audio is turned off when the mobile phone is picked up and the car audio is turned off, the power is automatically turned on and the call is played through the speaker 270, or if the car audio is listening to a tape or radio, the audio is played. Is automatically stopped and the call content of the mobile phone is played through the speaker 270.

3) Recording of call contents

There are two kinds of recording of the call. This is the case when recording to the car's built-in memory and recording to audio tape. In FIG. 1 of this embodiment, this can be set as the mode key 266. Pressing the mode key 266 turns on the lamp 268 next to the mode key 266 and pressing it again turns off the lamp 268. For example, the lamp is turned on in memory mode and the lamp is turned off in tape mode. Becomes The user can recognize whether this lamp is currently in memory or tape mode when playing or recording a report. When the recording key 265 is selected in the state selected as the memory mode, recording is performed in the memory. When the recording key 265 is pressed in the state selected as the tape mode, the recording is performed in the tape.

4) Repeat playback of the content recorded in the memory

The above-described memory / tape mode selection is applied under the same conditions even during reproduction. That is, when the play key 262 is pressed in the state where the memory mode is selected, the content recorded in the memory is played. When the play key 262 is pressed in the tape mode, the content recorded in the tape is played.

5) Tape copy (backing up) of the contents recorded in the memory

When the backup key 267 of FIG. 1 is selected, the recorded content in the memory is copied to the tape.

6) Other functions (rewind, fast forward, stop, charge function)

Rewind Selects the rewind key 261 of the car audio to move forward from the memory or tape to the beginning of playback. Fast-forward Selecting fast-forward key 263 moves back where to start playback in memory or tape. Stopping stops playback or recording when the stop key 264 is selected. To charge, simply connect your phone and car audio with a connection cable.

The detailed operation of the above-described embodiment will be described with reference to FIG. 2 for each function.

1) Playback of regular audio tapes

First, the system controller 340 reads the signal presence information h indicating whether there is a current voice signal of the signal level detector 320 to determine whether there is a current voice signal, and if not, starts the operation for reproducing the audio tape as follows. .

The system controller 340 converts the deck deck 240 to the playback mode through the tape deck control signal g, and then changes the playback selection switch 360 through the playback selection switch control signal e to terminals 1 and 2. The audio tape is played back when the is connected.

2) Play voice through speaker when talking on cell phone

As described above, the operation is automatically performed when a call is initiated by a call made to a mobile phone. That is, when a call is started, a voice signal is input through the mobile phone connection jack 220 or the microphone 210, and these two signals are added by the signal adder 280. The added signal is input to the signal level detector 320, and when a predetermined voice level or more is detected, it is determined that a call is made and the signal presence information h is transmitted to the system controller 340. The system control unit 340 receives this information (h) and connects the playback selection switch 360 to the terminal 1 and the terminal 3 via the playback selection switch control signal e to connect the microphone 210 and the mobile phone connection jack 220. It reproduces the audio signal input from. At this time, in order to prevent the sudden change of the playback signal, the system controller 340 sets the internal volume 390 to the minimum through the volume control signal f, and the above-described operation is performed.

3) Memory recording of call details

When recording memory in the memory mode, the system controller 340 first operates the analog-digital converter 290 through a control signal a. After the voice signal input from the microphone 210 and the mobile phone connection jack 220 is added by the signal adder 280, the signal input to the analog-to-digital converter 290 is converted into digital data by the analog-to-digital converter. do. The converted data is stored in the memory 300 of the address designated by the address generator 330, thereby performing a memory recording operation. At this time, the reproduction selection switch 360 connects the terminal 1 and the terminal 3 in accordance with the control signal e of the system controller 340 to record while listening to the recording contents.

4) Tape recording of the call

When recording to tape in the tape mode, the system controller 340 first sets the tape deck 240 to the recording mode through the tape deck control signal g, and sets the recording select switch 350 to terminal 1 and terminal. 2 is connected, and the reproduction select switch 360 connects the terminal 1 to the terminal 3, the audio signal added by the signal adder 280 is recorded on the tape through the recording select switch 350, and at the same time, the signal is selected for reproduction. Through the switch 360, the speaker plays the contents of the current call while recording the contents on the tape.

5) Playback of recorded content in memory

First, the system controller 340 operates (ON) the digital-analog converter 310 through the control signal c, receives data output from the memory 300, and converts the digital data into an analog signal. At this time, the reproduction selection switch 360 is connected between the terminal 1 and the terminal 4 so that the audio signal converted into analog is reproduced by the speaker 270 via the amplifier 370.

6) Tape copying of the contents recorded in the memory (backup)

First, the system controller 340 sets the tape deck 240 to the recording mode through the tape deck control signal g, and then operates the digital-to-analog converter 310 so that the data in the memory is the same as the operation of 4). Converts to an analog voice signal. At this time, the recording selection switch 350 is connected to the terminal 1 and the terminal 3 so that the audio signal converted into analog is recorded on the tape through the tape deck 240.

7) In the case of rewinding the memory mode, the system controller 340 sets the address generator 330 to the address reduction mode through the control signal b, and the address generator 330 jumps while reducing the address at a high speed. . In the tape mode, the system controller 340 controls the tape deck 240 to rewind the tape at a high speed as in the normal operation.

In the case of fast forwarding of the memory mode state, the system controller 340 sets the address generator 330 to the address increase mode through the control signal b, and the address generator 330 jumps while increasing the address at a high speed. In the tape mode, the system controller 340 controls the tape deck 240 to fast forward the tape in the forward direction as in a normal operation.

3 is a table showing the operation of each control signal for each function. The control signal a is a control signal to turn on / off the operation of the analog-digital converter 290, the control signal b is a memory address increase / decrease control signal, and the control signal c is to turn on the operation of the digital-analog converter 310. / off Control signal. The control signal d is a switch control signal for selecting whether to record the audio signal currently being input to the tape or the audio data stored in the memory to the tape as the recording selection switch control signal. The control signal e is a playback selection switch control signal that is used to select whether to play back the tape, the current call contents, or the audio data stored in the memory. The control signal f is a volume control signal, and the control signal g is a control signal for selecting the tape deck recording / playback mode and controlling the speed of the motor.

In FIG. 3, the operation state of the above-described control signal for each function is displayed, and X (Don't Care) may be in any state.

By combining the existing hand-free kit and the recorder of the present invention with car audio, the hand-free function can be used in the car at almost no cost, and at the same time, the contents of the call can be recorded and the audio volume is automatically adjusted. It is convenient to use by making functions such as reducing.

Claims (4)

By connecting via mobile phone and car audio through predetermined input / output jacks, it is possible to freely call and automatically charge while driving without installing the existing hand-free kit, and to record the contents of the call to the car audio memory or tape when necessary. Car audio hand-free recording device that automatically reduces the volume of the call when making a call. According to claim 1, The car audio is a mobile phone connection cable for connecting the mobile phone; A mobile phone connection jack to input and output microphone voice and voice and charging power of the mobile phone; A microphone to receive a caller's voice; A car audio hand-free recording device, comprising: a speaker for reproducing contents recorded on a tape or an internal memory with a car audio as described in 1 above and playing a sound to a user. The apparatus of claim 1, wherein the car audio unit comprises: a signal adder for adding a voice signal of a microphone and a voice signal input through the mobile phone connection jack of claim 2; An analog-digital converter for receiving the added analog signal and converting the digital signal into digital data; A memory for storing the converted digital voice data; An address generator which designates an address storing data in the memory; A digital-to-analog converter for receiving data from the memory and converting the contents of the memory to a voice during audio reproduction or tape copy; A signal level detector for determining whether there is an audio signal input from a mobile phone or a microphone and notifying the system controller of information; A system control unit for controlling other means according to information on whether there is a voice signal from the signal level detection unit and a function designated by the function selection unit; A playback selection switch for controlling whether to play back the contents of the memory or the tape under the control of the system controller; A recording selection switch for selecting whether the signal to be recorded on the tape is a memory content or a current call content; A car audio hand-free recording device comprising a tape deck that enables recording and playback of a tape in the car audio. The charging unit of claim 1, wherein the charging unit enables charging of the mobile phone by receiving power from the power supply unit of the car audio; A car audio hand-free recording device, comprising a function selection unit for allowing a user to select the above-described functions.