KR100356032B1 - MP3 player for vehicle - Google Patents

Abstract

The present invention relates to a car MP3 player, an antenna, a duplexer, a receiver amplifier, a detector, a baseband, an audio signal output terminal, a microphone, an audio signal input terminal, a modulator, an amplifier, a local oscillator, mixer, decoder, discrimination Wireless communication device consisting of a unit, a display unit, a keypad, and microprocessors can be configured by adding a logic interface, an MP3 receiver, an MP3 file encoder, a memory, an MP3 file decoder, an audio output unit, a digital / analog converter unit, and an earphone jack. Not only can communication device be used, but also it can output to the vehicle's audio device by using a cradle so that only the desired music can be downloaded and stored while moving using the vehicle, and then high-quality music can be heard. It is easier to download than the existing MP3 player, and it can satisfy various needs of consumers. To give additional functions to the operating system and will then have to enable the use of a language learner.

Description

MP3 player for vehicle {MP3 player for vehicle}

The present invention relates to an MP3 player for a vehicle. In particular, the wireless MP3 player and MP3 player are integrally configured to perform an MP3 file of a desired music as well as to perform a communication such as a wireless telephone or a call while moving using a vehicle. The present invention relates to a car MP3 player that can listen to high-quality music efficiently by downloading, storing it in a memory, storing it, restoring it if necessary, and listening to the sound of the vehicle.

It is well known that the development of the telecommunications industry has resulted in an increase in the number of people using wireless communication devices, so that almost everyone can talk to the person they want while on the move.

Wireless communication devices such as mobile phones, PCS, and two-way pagers provide more convenience to users by performing calculator functions, voice mailbox functions, electronic organizers, calendar functions, and weather forecast functions while receiving information through base stations. have.

Music lovers also enjoy the pleasure of listening to tapes or CDs that contain the music they want while on their way to the car with sound equipment such as cassette tape players or CD players.

However, such a general wireless communication device has a disadvantage in that it can not listen to the desired music instead of being able to receive information through the base station.

On the other hand, cassette tape players and CD players mounted in vehicles have the advantage that they can listen to music recorded on cassette tapes and CDs at any time, whereas cassette tapes and CDs do not contain only their favorite music. When playing a CD, you had to listen to a song you don't like while listening to your favorite song.

In addition, by compressing the voice signal into the internal memory, it can be stored in the memory and restored when desired. The MP3 player has the advantage of being able to hear high quality sound. On the other hand, it was inconvenient to use because a computer must be available to download the desired music file.

Accordingly, in the present invention, the wireless communication device and the MP3 player are integrally configured to perform a communication such as a wireless telephone or a call while moving by using a vehicle, as well as to download an MP3 file of a desired music and compress only the desired song into a memory. It is an object of the present invention to provide a vehicle MP3 player that can enjoy high quality music efficiently in the vehicle by storing and restoring it if necessary so that it can be heard through the vehicle's sound equipment or earphones.

In order to achieve the above object, the present invention provides an antenna, a duplexer, a reception amplifier, a detector, a baseband, an audio signal output terminal, a microphone, an audio signal input terminal, a modulator, an amplifier, a local oscillator, a mixer, a decoder, a discriminator. The vehicle by adding a logic interface, MP3 receiver, MP3 file encoder, memory, MP3 file decoder, audio output unit, digital / analog converter and earphone jack to a wireless communication device composed of a display unit, a keypad and a microprocessor. In addition to using the wireless communication device while moving, you can listen to the high-quality music recorded by selecting only your favorite songs by using wireless communication inside the vehicle. It is easy to download so that it can meet various needs of consumers and can be added to the system operation later. You can give a performance and will enable the use of a language learner.

1 is a block diagram schematically showing the configuration of a vehicular MP3 player according to an embodiment of the present invention;

Figure 2 is a perspective view schematically showing the installation state of the present invention.

Explanation of symbols on the main parts of the drawings

2: duplexer 5: baseband

21: MP3 receiver 22: MP3 file encoder

23: memory 24: MP3 file decoder

28: output contact 29: connection

30: amplifier

Hereinafter, the present invention will be described in detail according to an embodiment.

1 is a view schematically showing the overall configuration according to an embodiment of the present invention.

The present invention provides an antenna (ANT) 1 for transmission and reception with a base station (not shown), and a duplexer (DUPLEXER) 2 for inputting and outputting audio signals, control signals, and data signals through the antenna 1. And, when the audio signal is received through the duplexer 2, a reception amplifier 3 for gain-compensating and amplifying the received signal, and detecting the signal amplified by the reception amplifier 3, and amplifying the audio signal. A detection unit 4 for demodulating and outputting the signal, and an audio signal detected by the detection unit 4 is received through a base band 5 and output to a speaker 7 connected through a wired or wireless connection so that voice can be heard. When the audio signal output terminal unit 6, the audio signal is input through the microphone (9) and the audio signal input terminal unit 8 for transmitting it to the base band 5, and is input through the base band (5) Five A modulator 10 for modulating and outputting a video signal to a transmission frequency signal, and amplifying the signal modulated by the modulator 10 into a transmission signal and transmitting the amplified signal to the duplexer 2 for output through the antenna 1. A mixer 12 and a mixer 12 for mixing and outputting a control signal received through the duplexer 2 with an intermediate frequency signal supplied from the local oscillator 13 and an output through the mixer 12. A decoder 14 for waveform shaping the high frequency control signal to a digital form, and a discriminator for comparing the signal output from the decoder 14 with its own address to determine whether it is transmitted to itself and outputting a comparison signal. (15), MODE key, power on / off key, CLEAR key, SEND key, redial key, numeric key from 0 to 9, SILENT key, READ ) Key, UP key, DOWN key, storage key, input key, etc. The microprocessor 17 which controls the internal operation according to the keypad 16 consisting of the configuration, the comparison signal received through the discriminating unit 15 and the user's options input through the keypad 16. And a display unit 18 for displaying a current operation state and a number pressed by the keypad 16 while receiving a data signal from the microprocessor 17, and a control signal received through the base band 5. And a logic interface 19 for transmitting a data signal to the microprocessor 17 or for transferring data from the microprocessor 17 to the base band 5, and controlling the microprocessor 17. MP3 receiver 21 for downloading and receiving the MP3 file transmitted through the baseband 5 as a digital signal via the analog / digital converter 20, and the microphone The MP3 file encoder 22 compresses the information of the MP3 file transferred through the MP3 receiver 21 under the control of the processor 17 and the MP3 encoder 22 under the control of the microprocessor 17. The memory 23 stores information of the compressed MP3 file to be transmitted at a specific address for each song or deletes the stored information, and reads the information of the MP3 file stored in the memory 23 under the control of the microprocessor 17. The audio signal of the MP3 file decoder 24 which decompresses and decompresses while decoding, and the MP3 file decoder 24 which is restored by the MP3 file decoder 24 and converted into an analog signal while being passed through the digital / analog converter 25. The audio output unit 26 and the audio output unit 26 to enable amplification and waveform shaping to listen to music in the best condition through the earphones connected to the earphone jack 27. An output contact 28 connected to the lower end of the main body A and outputting an output audio signal to the outside, and a connecting portion 29 is electrically connected to the output contact 28 so as to compensate for a loss occurring during transmission. And an amplifier 30 for sufficiently amplifying the voice signal transmitted therethrough, and the vehicle acoustic devices B outputting the voice signal selectively transmitted through the cable 31 from the amplifier 30 through an internal speaker. It is composed of.

2 shows that when the MP3 player body A is installed in the insertion part 32 of the holder C, the output contact 28 located at the lower end of the body A comes into contact with the connection part 29 of the holder C. Through this, the audio signal output from the audio output unit 26 is amplified by the amplifier 30 in the cradle C, and then transferred to the acoustic device B of the vehicle through the cable 31 so as to provide high quality music in the vehicle. Let them listen.

In the vehicle MP3 player of the present invention configured as described above, when the user presses the power on / off key once while the user holds the main body A by hand, the user selects a mode of wireless communication in the microprocessor 17 that recognizes this. In order to determine whether the device is to be used or to select a mode of the MP3, the display unit 18 displays a mode selection mode.

When the user wants to make a call, the user selects a mode of wireless communication by using an up key and an input key of the keypad 16, and then inputs a number he / she wants to call while pressing a numeric key of the keypad 16.

If the desired telephone number is correct, the send key is turned on again so that a signal corresponding to the telephone number is transmitted to the base station (not shown), so that the call with the other party can be made.

When the receiver is on-line with the counterpart through the base station, the transmission / reception audio signal, the control signal, and the data signal input through the antenna ANT 1 are received through the duplexer 2, and the received signal is amplified. The audio signal is demodulated and detected by the detection unit 4 while gain compensation is performed by the unit 3.

The audio signal detected by the detection unit 4 is transmitted to the audio output terminal unit 6 through the base band 5 and output to the speaker 7 connected by wire or wireless to listen to the voice of the other party.

When the user's audio signal is input through the microphone 9, the audio signal input terminal unit 8 transmits the signal to the modulation unit 10 via the base band 5 to modulate the audio signal into a transmission frequency signal. The amplification unit 11 outputs through the duplexer 2 and the antenna 1 so that the other party can hear the user's voice.

Meanwhile, the control signal received through the duplexer 2 is mixed with the intermediate frequency signal supplied from the local oscillator 13 in the mixer 12, and the high frequency control signal is waveform-shaped in the digital form at the decoder 14. The discriminating unit 15 determines whether it is transmitted to itself by comparing with its own address, and transmits a comparison signal to the microprocessor 17 to notify the outside through the display unit 18 of the state that the phone is called. Allows you to control the operation of.

If the user holding the MP3 player main body A selects the MP3 mode and wirelessly turns on the storage key of the keypad 16 in order to download the radio wirelessly from the inside or another area of the vehicle, the wireless communication recognizes this. The microprocessor 17 of the device A outputs a control signal to the logic interface 19 to receive a control signal and a data signal received through the base band 5.

The microprocessor 17 controls the MP3 file, which is a data signal transmitted through the baseband 5, to be selectively downloaded to the MP3 receiver 21 via the analog / digital converter 20.

Here, the MP3 file downloaded to the MP3 receiver 21 does not receive all the files of many songs transmitted through the base station, but displays the table of contents included in the control and data signals received by the microprocessor 17. After the user finds the song he wants with the up and down keys, he selects the song to download by turning on the save key.

The music downloaded through the MP3 receiver 21 while the user selects the MP3 mode is compressed by the MP3 file encoder 22 under the control of the microprocessor 17 to compress the information of the MP3 file into the memory 23. Store at high storage efficiency.

The memory 23 under the control of the microprocessor 17 stores the information of the compressed MP3 file transmitted through the MP3 encoder 22 at an address designated for each song or removably.

When the user turns on the lead key of the keypad 16 without selecting a mode to download and store the MP3 mode, the microprocessor 17 recognizes the music stored in the internal memory 23. Read the table of contents and display it on the display unit 18 to allow the user to select the song you want to listen to.

When the user designates a desired song by using the up key and the down key, and turns on the input key, the microprocessor 17 recognizes the information of the MP3 file of the song stored at the specified address of the memory 23, and the MP3 file decoder The decoded signal is transmitted to the decoder 24, and the signal decompressed by the MP3 file decoder 24 is converted into an analog signal by the digital / analog converter 24 and transmitted to the audio output unit 26.

That is, the analog signal converted from the digital / analog converter 25 of the MP3 file restored by the MP3 file decoder 24 is amplified and waveform-shaped by the audio output unit 26 to perform music in the best condition. It can be heard through the earphone connected to the earphone jack 27.

At the same time, when the MP3 player main body A is installed in the insertion part 32 of the holder C, the output contact 28 located at the lower end of the main body A comes into contact with the connection part 29 of the holder C. In this way, the audio signal output from the audio output unit 26 is sufficiently amplified by the amplifier 30 in the holder C, and then transferred to the acoustic device B of the vehicle through the cable 31, thereby ensuring high quality in the vehicle. Can listen to music.

Although the present embodiment has described a case in which a wireless communication device is used as a mobile phone, even when using a PCS or a two-way wireless pager, there is an advantage that the MP3 file of a desired song can be downloaded through each base station and listened in clean sound quality.

In addition to the MP3 player, if a caption function is displayed to display information corresponding to the lyrics of the song being played, it can be used as a language learner.

Therefore, according to the vehicle MP3 player of the present invention, while adding the configuration of the MP3 player to the wireless communication device to output to the acoustic device of the vehicle using a cradle, the wireless communication device can be used while moving by using the vehicle. After downloading and storing only the music you want, you can listen to high-quality music, it is easy to carry, and it is easy to download compared to the existing MP3 player to satisfy various needs of consumers.

Claims (1)

A duplexer 2 connected to the antenna 1, a detector 4 connected to the duplexer 2 through a reception amplifier 3, and a speaker 7 connected to the detector 4 through a base band 5. An audio signal output terminal unit 6, an audio signal input terminal unit 8 connected between the microphone 9 and the base band 5, and a duplexer connected between the base band 5 and the amplifier 11 A discriminator for determining a signal output from the decoder 14 connected through the modulator 10, the duplexer 2, the mixer 12, and the decoder 14, and outputting a comparison signal ( 15), a microprocessor 17 for controlling an internal operation while receiving an option through the keypad 16 and a comparison signal of the discriminating unit 15 and displaying an operating state on the display unit 18, the base band. (5) and the microprocessor 17 to transfer control signals and data signals to each other The memory interface 23 compresses the information of the MP3 file and the MP3 receiver 21 which downloads the MP3 file transmitted through the analog / digital converter 20 from the baseband 5. MP3 file encoder 22 to be stored in the storage unit, MP3 file information stored in the memory 23 is read and restored, and passed through the digital / analog conversion unit 25 to the audio output unit 26 to the earphone jack 26 In the vehicle MP3 player composed of MP3 file decoders 24 to be output through At the lower end of the MP3 player main body A, an output contact 28 connected to the internal audio output unit 26 is provided. A connection portion 29 is formed at the lower portion of the holder C on which the MP3 player body A is mounted to contact the output contact 28. Inside the cradle C to receive and amplify a signal output from the audio output unit 26 through the output contact 28 and the connection unit 29 and transmit the amplified signal to the acoustic device B of the vehicle through the cable 31. Vehicle MP3 player characterized in that the amplifier 30 is installed in.