KR200296232Y1 - Portable audiofile player including radiofrequency transmitter - Google Patents

Abstract

Disclosed is a portable audio file reproducing apparatus incorporating a wireless transmitter. The present invention is a control unit for controlling the storage and playback of the digital signal compressed by the audio signal compression technology, a command input unit for the user inputs a control command to the control unit, to display the operation state according to the command input through the command input unit An audio file reproducing apparatus for outputting an audio signal, which is an analog signal output from the display unit and the control unit, comprising: a predetermined fixed frequency other than the FM modulated radio frequency band and a predetermined fixed frequency of the FM modulated radio frequency band as a transmission frequency; It characterized in that it comprises a; wireless transmission unit.

Therefore, the user's activity is improved by using the wired output of the conventional portable audio file reproducing apparatus as a wireless output, and the transmission frequency of the wireless transmitting unit is divided into the FM modulation region and the outside region to enable use with other audio apparatuses and at the same time The effect is that the signal can be transmitted without noise.

Description

Portable audio file player with built-in wireless transmitter {PORTABLE AUDIOFILE PLAYER INCLUDING RADIOFREQUENCY TRANSMITTER}

The present invention relates to an audio file reproducing apparatus for storing and reproducing a digital signal compressed by an audio signal compression technology for compressing an audio signal converted into a digital signal.

Audio signal reproducing apparatus has been developed in various forms, and in recent years, it can compress 50 times that of general CD while maintaining the sound quality of MP3 (MPEG Audio Layer-3) CD. Due to its excellent sound quality and compression ratio, TCP It is widely used for AOD and Internet FM radio broadcasting on the Internet. Therefore, a portable device capable of playing an audio file compressed in the MP3 format as described above has been developed and is currently used universally.

As shown in FIG. 1, the MP3 player, which is one of general audio file player, includes a control unit 10 for storing or playing an audio file, a suit unit 20 for storing an audio file, and a command input unit for a user to input a command. 30, a display unit 40 for displaying an operation state of the current playback apparatus, and an output jack 50 connected to an external audio signal output unit 60, and the like. The MP3 player configured as described above operates according to a command input to the microcontroller 12 of the controller 10 through the command input unit 30, and stored in the microcontroller 12 in the case of audio file reproduction. The audio file stored in the unit 20 is called, and the called audio file is decoded through the MP3 decoder 14, and the decoded digital signal is converted into an audio signal through the D / A converter 16. The audio signal is output through an output unit 60 connected to the output jack 50, and the output unit 60 is generally made up of headphones or earphones.

However, although the audio file reproducing apparatus has been miniaturized for portable purposes, it is necessary to connect the headphone or earphone made of a general small speaker by wire through a jack for outputting an audio signal so that the user is inconvenient and especially when there is a lot of activity. There is a problem that the wired interferes with the user's activity, and a separate device and a connection line are required when using an existing audio device, for example, an audio system or a car audio device.

Therefore, the present invention was devised to solve the above problems, and it is inconvenient for a user to use an earphone or a headphone by wirelessly transmitting an audio signal output from the audio file reproducing apparatus by embedding a wireless transmitter in the audio file reproducing apparatus. It is an object of the present invention to provide an audio file reproducing apparatus capable of eliminating a box and using an audio system and a vehicle audio device without the need for a separate device and a connection line.

1 is a block diagram of an apparatus for reproducing a conventional audio file.

Figure 2 is a view showing the configuration of the audio file playback device with a built-in wireless transmission unit of the present invention.

3 is a view showing a remote command unit of the audio file playback apparatus with a wireless transmitter of the present invention.

Figure 4 is a view showing an embodiment of a portable audio file playback device with a built-in wireless transmission unit.

Figure 5 is a view showing an embodiment of a wireless earphone according to a portable audio file playback device with a built-in wireless transmitter.

Figure 6 is a view showing a form to be used as a wired earphone of a portable audio file playback device with a built-in wireless transmitter.

The present invention for achieving the above technical problem is a control unit for controlling the storage and playback of the digital signal compressed by the audio signal compression technology, a command input unit for the user to input a control command to the control unit, the input through the command input unit A display unit for displaying an operation state in accordance with a predetermined command and an audio file reproduction device for outputting an audio signal, which is an analog signal output from the control unit, comprising: a predetermined fixed frequency other than the FM modulated radio frequency band and a predetermined FM modulated radio frequency band; It characterized in that it comprises a; wireless transmitter having all fixed frequencies of the transmission frequency.

In addition, a radio receiver having a predetermined fixed frequency other than the M-modulated radio frequency range as a reception frequency; And an output unit for outputting an audio signal received through the wireless receiver.

In addition, the wireless transmission unit preferably further comprises a switching switch for switching between wireless transmission and wired transmission.

In addition, the changeover switch may further include a selection switch for selecting a transmission frequency in the case of wireless transmission.

In addition, the remote command input unit for inputting the same control signal as the command input unit; A command signal transmitter for wirelessly transmitting a command signal input from the remote command input unit; And a command signal receiver for receiving a command signal transmitted from the command signal transmitter and transmitting the received command signal to the controller.

Hereinafter, with reference to the accompanying drawings, a portable audio file playback device with a built-in wireless transmitter will be described in detail using an MP3 playback device as an example.

2 is a view showing the configuration of an audio file reproducing apparatus incorporating the present invention wireless transmitter. As shown in FIG. 2, the present invention provides a control unit 10 for playing an audio file, a storage unit 20 for storing an audio file, a command input unit 30 for a user to input a command, and an operation of a current playback device. It is composed of a display unit 40, an output jack 50, and a radio transmitter 70 (an RF transmitter) for displaying the status.

It is also configured to further include an output unit 60 and a radio receiver 80 (RF receiver).

The hardware configuration for reproducing the audio file is similar to that of the conventional audio file reproducing apparatus, and is not limited to any particular audio file reproducing hardware. The wireless transmission unit 70 further includes a D / A converter 16. The finally output audio signal is modulated by the wireless transmitter 70 and transmitted.

In addition, the output unit 60 and the wireless receiving unit 80 further includes receiving the modulated signal, demodulating the received signal to extract an audio signal and input it to the output unit 60.

The wireless transmitter 70 (RF transmitter) is composed of an amplitude modulator, a mixer, a crystal oscillator, a frequency multiplier, a power amplifier, and the like, and modulates and amplifies an audio signal for transmission. The wireless transmitter 70 is not limited to any specific wireless transmitter, but may be configured with various types of wireless transmitters capable of transmitting audio signals.

In particular, the radio transmitter 70 has a predetermined frequency at which the transmission frequency is not used by a radio station in the FM modulated radio frequency domain, and has a fixed frequency at a fixed frequency other than the FM modulated radio frequency domain. Have

Accordingly, the radio transmitter 70 may transmit the audio signal at a frequency in the radio frequency band or a frequency outside the band.

The radio receiver 80 (RF receiver) includes a low noise amplifier, a mixer ratio, a voltage controlled oscillator, an intermediate frequency processor, an FM modulation detector, and the like, and receives and amplifies and demodulates a radio signal transmitted from the radio transmitter 70. Extracts the audio signal within the radio signal. At this time, the reception frequency of the radio receiver 80 preferably has a predetermined frequency other than the FM modulated radio frequency domain.

Therefore, the wireless receiver 80 may be connected to an output unit 60 such as an earphone or a headphone made of a small speaker to wirelessly receive and output an audio signal transmitted from the wireless transmitter 70.

In the case where the transmission frequency is set to a frequency within the FM modulated radio frequency region by the wireless transmitter 70, the audio file reproducing apparatus is set by adjusting the frequency of an audio device or a vehicle audio device equipped with a general radio tuner to the transmission frequency. The audio signal may be received and output through a speaker provided in the audio device and the vehicle audio device. When the transmission frequency is set to a frequency other than the FM modulated radio frequency band in the wireless transmitter 70, It is possible to receive and output audio signals transmitted from the audio file reproducing apparatus through headphones or earphones provided with a wireless receiving unit 80 capable of receiving a transmission frequency.

3 is a view showing a remote command unit of the audio file reproducing apparatus with a wireless transmitter of the present invention. As shown in FIG. 3, the present invention further includes a remote command input unit 90, a remote command transmitter 92, and a remote command receiver 95 at the radio transmitter 70 at the radio receiver 80. Inputs a predetermined command signal through the remote command input unit 90, the input command signal is transmitted through the remote command transmitter 92, and the remote command receiver 95 is the power command transmitter 92. Receives the command signal transmitted from the) and transmits to the microcontroller (12).

The remote command input unit 90 can command several operations required for playing an audio file. Generally, the remote command input unit 90 can play, stop, move forward, and retreat. If any one of the operations is selected, the command signal already determined according to the operation is output from the remote command transmitter 92 to be transmitted through a predetermined modulation.

The modulated and transmitted command signal is received and demodulated through the remote command receiver 95 and becomes an input signal to the microcontroller 12.

At this time, the modulation and demodulation circuits of the remote command transmitter 92 and the remote command receiver 95 are not limited to any specific circuit, and a circuit used in the case of radio control using frequency modulation can be used.

For example, the remote command input unit 90 and the remote command transmitter unit 92 are provided on the output unit 60 in which the wireless receiver unit 80 is embedded, but the present invention is not limited thereto. The input unit 90 and the remote command transmitter 92 may have a separate power supply unit and may have an independent form. The independent form preferably has the form of a remote controller using a general radio frequency.

Although the present invention has been described in detail with reference to an apparatus for playing MP3 files, the present invention is not necessarily limited thereto. For example, a compact disc player, an MD player, a cassette player with an MP3 function, a PDA, and a portable MP3 function. It corresponds to various types of portable audio file reproducing apparatus capable of reproducing an audio file such as a communication apparatus.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of a portable audio file playback device with a built-in wireless transmitter.

4 is a view showing an embodiment of a portable audio file reproducing apparatus incorporating the present invention wireless transmitter. As shown in FIG. 4, the present invention can be configured as a main body 100, a keypad 110, a changeover switch 120, and an earphone 130. The main body 100 includes a power supply unit, a control unit, A storage unit, a wireless transmitter, and other audio files are reproduced to form an integral part, and the keypad 110 is provided on one surface so that a user can input a desired command. The changeover switch 120 is a switch for turning on / off the wireless transmission. If the changeover switch 120 is selected to be off, the wireless transmission is not performed. Only the wired earphone 130 to the headphone can be output.

5 is a view showing an embodiment of a wireless earphone according to a portable audio file playback device with a built-in wireless transmitter. As shown in FIG. 5, when the position of the changeover switch 120 provided in the main body 100 is changed and the radio transmission is turned on, at a predetermined transmission frequency through the wireless transmission unit provided in the main body 100. An audio signal is transmitted, and the transmitted signal is received through the wireless receiver 200 of the earphone 240 provided with the wireless receiver 200. In this case, it is preferable that the transmission frequency use a frequency outside the FM modulation radio frequency band.

In addition, the changeover switch 120 preferably allows the transmission frequency to select a frequency in or out of the FM modulation radio frequency domain.

Therefore, if the frequency in the FM modulation radio frequency band is used as the transmission frequency, the audio signal can be output using the audio device or the vehicle audio in which the general tuner is built even without the earphone 240 having the wireless receiver.

In addition, the wireless receiver main body 200 is provided with a remote command input unit 210 on one side so that the user can input a command wirelessly, the switch 230 for turning on / off the power of the wireless receiver; It is preferable to further include an on / off LED 220 so that the current on / off state can be easily visually checked.

The command selected through the remote command input unit 210 is transmitted through a remote command transmitter provided in the wireless signal unit main body 200, and the transmitted signal is received through a remote command receiver provided in the main unit 100. Then, it is input to the microcontroller in the controller to perform a predetermined operation.

In addition, as shown in FIG. 6, it is preferable to provide a jack connected through the connection jack 140 in the wireless receiver main body 200 so that it can be used by wire connection.

The scope of the present invention is not limited to the above embodiments, and may be modified or modified by those skilled in the art within the scope of the present invention defined by the appended claims.

As described above in the detailed description of the present invention, the present invention provides a radio transmitter having a transmission frequency in the FM modulation radio frequency band and a transmission frequency outside the band at the same time, and a radio receiver for receiving a transmission frequency outside the FM modulation radio frequency band. FM output radio using fixed transmission frequency of different frequency bands by eliminating inconvenience in using portable audio file playback device by wirelessly transmitting audio signal through wired line through conventional output unit In the case of using a wireless receiver that receives a transmission frequency outside the frequency domain, an audio signal can be transmitted without noise. When using a transmission frequency in the FM modulated radio frequency region, an audio device or a vehicle audio including a tuner is provided without the wireless receiver. Device There is an effect that can output the audio signal transmitted from the wireless transmitter.

Claims (5)

A control unit for controlling the storage and reproduction of the digital signal compressed by the audio signal compression technology, a command input unit for inputting a control command to the control unit, a display unit for displaying the operation state according to the command input through the command input unit and the In the audio file playback apparatus for outputting an audio signal which is an analog signal output from the control unit, And a wireless transmitter having both a predetermined fixed frequency other than the FM modulated radio frequency band and a predetermined fixed frequency of the FM modulated radio frequency band as a transmission frequency. The method of claim 1, A radio receiver having a predetermined fixed frequency other than the FM modulated radio frequency range as a reception frequency; And And an output unit for outputting an audio signal received through the wireless receiver. According to claim 1, wherein the wireless transmitter Portable audio file playback device with a built-in wireless transmitter, characterized in that it further comprises a; switch for switching between wireless transmission and wired transmission. The method of claim 3, wherein the changeover switch In the case of wireless transmission, a selection switch for selecting a transmission frequency; a portable audio file playback device with a wireless transmitter further comprising a. The method of claim 1, A remote command input unit capable of inputting the same control signal as the command input unit; A command signal transmitter for wirelessly transmitting a command signal input from the remote command input unit; And And a command signal receiver for receiving a command signal transmitted from the command signal transmitter and transmitting the received command signal to the controller.