KR200306337Y1 - Portable Audio Player Including wireless transceiving function - Google Patents

Abstract

The present invention relates to a portable audio device having a wireless transmission / reception function. The present invention relates to a receiver for scanning and receiving a preset frequency band from a radio repeater, and extracts an unused frequency band from the frequency band by a preset method, and a preset method. A control unit for calculating an optimal transmission frequency among the frequency bands, a storage unit for storing an audio file, a decoder for decoding the audio file stored in the storage unit, and a signal for converting the decoded audio file into an analog audio signal. And a transmitter for modulating and transmitting the analog audio signal at an optimum frequency calculated by the D / A converter and the controller.

Description

Portable audio device with a wireless transceiving function {Portable Audio Player Including wireless transceiving function}

The present invention relates to a portable audio device having a wireless transmission / reception function, and more particularly, to have a wireless transmission / reception function so that an audio file or audio data such as MP3 can be transmitted to a radio or the like through a preset frequency band and output. The present invention relates to a portable audio device having a wireless transmission / reception function.

In recent years, digital audio devices such as CD players and MP3 players have gradually been widely used instead of the small cassettes that have conventionally been used as portable audio devices.

In particular, since MP3 players can store and delete MP3 music files in memory at will, they do not require tapes or CDs like cassettes or CD players, and are rapidly spreading due to the advantage of easy download of music files through the Internet. .

1 is a block diagram showing the internal configuration of such a conventional MP3 player 10. As shown in FIG.

Referring to FIG. 1, a configuration of a conventional MP3 player is briefly described. When a user presses a button for controlling an MP3, a key input unit 11 outputting a key signal for controlling the MP3, a storage unit 15 storing an MP3 file, and an MP3 file are stored. A control signal corresponding to the control key input of the D / A converter 19 and the key input unit 11 for converting the decoded MP3 file into an analog signal and outputting the analog signal to the speaker 20. It consists of the control part 13 which outputs.

The playback operation in the conventional MP3 player configured as described above is as follows.

When the user presses the play button of the MP3 player, the key input unit 11 outputs an MP3 file play key signal. Accordingly, the control unit 13 outputs an MP3 play signal to operate the MP3 decoder 17.

The MP3 decoder 17 decodes and transmits the MP3 file stored in the storage unit 15 to the D / A converter 19 by the playback signal of the controller 13, and the D / A converter 19 is decoded. The input MP3 file is converted into an analog signal and output through the speaker 20.

However, since the output power of the speaker 20 is small as described above, the MP3 player 10 generally listens to music using earphones or headphones. Therefore, it is true that there is a lot of trouble when it is desired to listen to music through the MP3 player 10 in a house or the inside of a vehicle.

In addition, since it is necessary to use earphones or headphones, there is a problem in that music cannot be listened to together when several people are not alone.

Accordingly, there is a growing demand for a portable audio device that can solve the irrationality of the conventional portable audio device and allow the user to listen to music conveniently in a house or the interior of a vehicle.

The present invention has been made to solve the above problems, and the first object of the present invention is to provide a portable audio device with a wireless transceiver to transmit audio files or audio data such as MP3 to a radio or the like through a preset frequency band. The present invention provides a portable audio device having a wireless transmission / reception function for transmitting and outputting.

A second object of the present invention is to provide a function of extracting an optimal transmission frequency band by searching a frequency band currently used in a wireless transceiver, thereby more efficiently transmitting and outputting an audio file or audio data such as an MP3 to a radio or the like. It is to provide a portable audio device having a wireless transmission and reception function to enable.

A third object of the present invention is to provide a wireless remote control function of the portable audio device, so that the wireless remote control capable of wireless transmission and reception for transmitting and outputting audio files or audio data such as MP3 and the like through the remote control easily It is to provide a portable audio device provided.

A fourth object of the present invention is to provide a wireless transmission / reception chip in a portable audio device, so that wireless transmission / reception can be performed by transmitting audio files or audio data such as MP3 or the like through a radio while using the configuration of the conventional portable audio device as it is. It is to provide a portable audio device provided with a chip.

1 is a block diagram showing the internal configuration of a conventional MP3 player;

2 is a system configuration diagram showing a system for implementing a portable audio device according to the present invention;

3 is a block diagram showing an internal configuration of a portable audio device with a wireless transmit / receive function according to a first embodiment of the present invention;

4 is a block diagram illustrating an internal configuration of a remote controller having a wireless transmission / reception function according to a second embodiment of the present invention;

5 is a block diagram showing an internal configuration of a portable audio device having a wireless transmission / reception chip according to a third embodiment of the present invention;

6 is a flowchart illustrating a process of transmitting an audio file in a portable audio device having a wireless transmission / reception function according to the present invention.

<Brief description of the major reference numerals>

30: portable audio device, 31, 61: key input unit,

33, 63: display unit, 37, 65: control unit,

39: decoder, 41: D / A converter,

45: A / D converter, 53, 79: modulator,

49, 71: demodulation unit, 50, 80: transceiver unit,

52, 72: receiver, 54, 78: transmitter,

57, 83: antenna 100: chip interface unit.

According to a first aspect of the present invention for achieving the above object, the present invention relates to a portable audio device having a wireless transmission / reception function, comprising: a receiver configured to scan and receive a predetermined frequency band from a radio repeater, in a predetermined manner; A control unit for extracting an unused frequency band from a frequency band and calculating an optimum transmission frequency among the frequency bands by a preset method, a storage unit for storing an audio file, and a decoder for decoding an audio file stored in the storage unit And a D / A converter for converting the decoded audio file into an analog audio signal, and a transmitter for modulating and transmitting the analog audio signal at an optimum frequency calculated by the controller. Equipped cell An audio device may be provided.

According to a second aspect of the present invention, a remote control unit connected to a portable audio device and equipped with a wireless transmission / reception function includes: a receiver for scanning and receiving a preset frequency band from a radio repeater; A remote control interface for extracting a current frequency band and providing an interface between the portable audio device and the remote controller for calculating an optimum transmission frequency among the frequency bands in a preset manner, and receiving an analog audio signal from the portable audio device; A remote control having a wireless transmission / reception function may be provided, including a transmission unit for modulating and transmitting the analog audio signal at an optimum frequency.

According to a third aspect of the present invention, a wireless transmitting / receiving chip embedded in a portable audio device includes: a receiver configured to scan and receive a preset frequency band from a radio repeater, and to set an unused frequency band in the frequency band by a preset method. A control unit for extracting and calculating an optimum transmission frequency among the frequency bands according to a preset method, a chip interface for providing an interface between the portable audio device and the chip for wireless transmission and reception, and receiving an analog audio signal from the portable audio device. A wireless transmitting / receiving chip may be provided in a portable audio device, characterized in that a transmission unit for modulating and transmitting the analog audio signal at an optimum frequency.

According to a fourth aspect of the present invention, a portable audio device having a chip for wireless transmission / reception may be provided. The portable audio device may include a radio transmission / reception chip according to claim 7.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings to describe the embodiment of the present invention in detail.

2 is a system configuration diagram showing a system for implementing a portable audio device according to the present invention.

As shown in FIG. 2, a system for implementing a portable audio device according to the present invention is composed of a plurality of radio repeaters 55, a portable audio device 30, and a radio 53.

The portable audio device 30 according to the present invention has a wireless transmit / receive function and scans each frequency band from the plurality of radio repeaters 55 so as to be optimal among frequency bands outside the frequency bands occupied by the plurality of radio repeaters 55. Extract the transmit frequency band.

The portable audio device 30 loads the audio data on the optimum transmission frequency extracted through the modulation process and transmits the audio data to the radio 53 to output the audio data through the speaker 54 provided in the radio 53.

The wireless transmit / receive function of the portable audio device 30 may include a built-in wireless transmit / receive function directly, a case where the portable audio device 30 is provided in the remote controller, a case where a wireless transmit / receive function chip is mounted, and the like. A detailed description of each of these embodiments will be described in detail with reference to FIGS. 3 to 5 below.

Here, the radio 53 may be any other communication device capable of wireless transmission and reception, a stereo playback device equipped with a radio, or the like.

<First Embodiment>

3 is a block diagram showing an internal configuration of a portable audio device 30 equipped with a wireless transmission / reception function according to the first embodiment of the present invention. As shown in FIG. 3, the portable audio device 30 having the wireless transmission / reception function according to the first embodiment of the present invention includes a key input unit 31, a display unit 33, a storage unit 35, and a control unit 37. ), Decoder 39, D / A converter 41, output unit 43, A / D converter 45, and transceiver 50. Here, the transceiver 50 is composed of a transmitter 54, a receiver 52 and an antenna 57.

The key input unit 31 receives a key input from the user and generates a key control signal corresponding to the received key input. For example, an audio file transfer key is included in addition to a stop key, a play key, a pause key, and a recording key provided in a general audio device. In general, a keypad is mainly used, but the touch screen method may be implemented. Do.

The display unit 33 is for displaying transmission audio file information such as the current transmission frequency and the audio file name to which the audio file is being transmitted. LCD is mainly used as the display unit 33, but other display devices such as EL (electroluminescence), LED, and electro chromic display (ECD) can be used.

The storage unit 35 is a nonvolatile memory for storing audio files, and a large capacity nonvolatile memory such as an HDD is used to store a large amount of audio files.

The receiver 52 scans and receives a predetermined frequency band from the radio repeater, and is further subdivided into a demodulator 49 and an amplifier 50. The amplifier 50 amplifies the signal for each frequency band received through the antenna unit 57 and transmits the signal to the demodulator 49 to recover the original signal without error. The demodulator 49 controls the controller 37. The frequency band signal is extracted from the carriers of each frequency band scanned in accordance with the demodulation control signal of Rx, and restored to the original signal.

The A / D converter 45 converts the frequency band signal recovered by the demodulator 49 into digital data and transmits the converted digital signal to the controller 37.

The control unit 37 extracts an unused frequency band from the frequency band by a preset method, and calculates an optimal transmission frequency among the frequency bands by a preset method, and includes a memory (not shown) in the control unit 37. The demodulation control module 37-1, the frequency band extraction module 37-3, the optimum transmission frequency setting module 37-5, the modulation control module 37-7, and the audio file driven by the control unit 37 The extraction module 37-9 is stored.

The demodulation control module 37-1 is a program for the demodulator 49 to obtain the current frequency band information by restoring the original signal while scanning the frequency band signal in the preset section.

The frequency band extracting module 37-3 is a program for extracting a currently unused frequency band. The frequency band extracting module 37-3 determines whether a signal for each frequency band scanned and demodulated by the demodulation control module 37-1 is a voice signal or a noise signal. The signal part is determined as the frequency band currently in use. The frequency band extracting module 37-3 extracts unused frequency bands by recognizing among currently used frequency bands as unused frequency bands.

The optimum transmission frequency setting module 37-5 is a program for calculating an optimum transmission frequency among the extracted unused frequency bands, and the unused frequency having the widest bandwidth among the unused frequency bands extracted by the frequency band extraction module 37-3. Extract the band and set its intermediate value to the optimal transmission frequency.

The audio file extraction module 37-9 is a program for extracting an audio file to be transmitted from the storage 35.

The modulation control module 37-7 is a program that modulates and transmits the analog audio signal converted from the audio file at the set optimal transmission frequency.

The decoder 39 is for decoding the audio file extracted by the audio file extraction module 37-9.

The D / A converter 41 is for converting the decoded audio file into an analog audio signal.

The transmitter 54 modulates and transmits an analog audio signal at an optimal transmission frequency calculated by the optimum transmission frequency setting module. The transmitter 54 modulates an audio signal converted into an analog signal to the calculated optimal transmission frequency. Amplification unit 55 for amplifying and transmitting the modulated audio signal. As a modulation method in the modulator 53, the FM modulation method is used in this embodiment, but it is also possible to use an AM modulation method, a pulse modulation method, or the like.

Second Embodiment

4 is a block diagram illustrating an internal configuration of a remote controller having a wireless transmission / reception function according to a second embodiment of the present invention. In the second embodiment, the wireless transmission / reception function is provided in the remote controller 60 instead of the portable audio device 30, and the audio file is transmitted to the outside by the remote controller 60. As shown in FIG. 4, the remote controller 60 having the wireless transmission / reception function according to the second embodiment of the present invention includes a key input unit 61, a display unit 63, a control unit 65, and a remote control interface unit 67. And an A / D converter 69 and a transceiver 80. Here, similarly to the first embodiment, the transceiver 50 is composed of a transmitter 78, a receiver 72, and an antenna 83.

The key input unit 61 is the same as the key input unit of the normal remote control except that the audio file transfer key is provided in addition to the keys provided in the normal remote control.

The display section 63 is the same as a normal remote control apparatus, but similarly to the display section 33 in Fig. 3, it displays the transmission audio file information such as the current transmission frequency and the audio file name.

In addition to the normal remote control function, the control section 65, as in the first embodiment, includes a demodulation control module 37-1, a frequency band extraction module 37-3, an optimum transmission frequency setting module 37-5, and modulation. The control module 37-7 is driven to calculate an optimal transmission frequency to generate a control signal for modulating and transmitting the audio file desired to be transmitted to the calculated optimal transmission frequency.

The remote control interface unit 67 is to provide an interface between the portable audio device 30 and the remote control. The remote control interface unit 67 transmits an audio file extraction control signal generated by the control unit 65 to the portable audio device 30. 30 provides a path for receiving an analog audio signal (which is decoded and converted into an analog signal by the decoder 39 and the D / A converter 41 in the portable audio device 30).

Since the configurations of the A / D converter 71 and the transceiver 80 are the same as those of FIG. 3, description thereof will be omitted.

Third Embodiment

5 is a block diagram showing an internal configuration of a portable audio device 80 equipped with a wireless transmit / receive chip 80 according to a third embodiment of the present invention.

As shown in FIG. 5, the configuration of the portable audio device 80 is the same as that of the conventional portable audio device 10 shown in FIG. That is, according to the third embodiment, an internal configuration of the conventional portable audio device 10 may be used as it is by installing a separate wireless transmit / receive chip 90 on an internal circuit board (not shown) of the conventional portable audio device 10. It is to ensure that.

The wireless transceiver chip 90 includes a controller 93, an A / D converter 95, a transceiver 97, and a chip interface unit 100.

As in the first and second embodiments, the control unit 93 includes a demodulation control module 37-1, a frequency band extraction module 37-3, an optimum transmission frequency setting module 37-5 and a modulation control module ( 37-7) to calculate an optimal transmission frequency to generate a control signal for modulating and transmitting the audio file desired to be transmitted to the calculated optimal transmission frequency.

In the third embodiment, since the portable audio device 10 needs to be compatible with the conventional portable audio device 10, the wireless transmit / receive chip 80 is provided with audio from the portable audio device 10 separately from the control unit 13 in the portable audio device 10. A control unit 93 may be provided to extract a file, perform wireless transmission and reception, and perform an optimal transmission frequency extraction function.

Since the configurations of the A / D converter 91 and the transceiver 97 are the same as those of FIGS. 3 and 4, the description thereof will be omitted.

The chip interface unit 100 is to provide a physical interface between the portable audio device 10 and the chip 90 for wireless transmission and reception. That is, to establish an appropriate physical connection so that communication between the portable audio device 10 and the wireless transmission / reception chip 90 can be effectively performed.

6 is a flowchart illustrating a process of transmitting an audio file in a portable audio device having a wireless transmission / reception function according to the present invention.

Since the audio file transmission process in each of the above embodiments is almost the same, the following description will be given with reference to FIG. 3.

First, an audio file transmission command including an audio file name to be transmitted from the user through the key input unit 31 is input (S100). When the audio file transfer command is input, the key input unit 31 generates a key input control signal corresponding thereto and transmits the same to the controller 37, and the audio file transfer process is performed by the controller 37.

The control unit 37 drives the demodulation control module 37-1 to scan a preset frequency band, and restores the scanned frequency band signal to the original signal in the demodulator 49 (S110).

The controller 37 drives the frequency band extraction module 37-3 to extract a frequency band that is not currently used from the scanned frequency bands (S120). The control unit 37 drives the frequency band extraction module 37-5 so that the demodulator 49 demodulates the frequency band signal scanned by the antenna unit 57 into the original signal. The demodulated frequency band signal is converted into digital data by the A / D converter 45. The frequency band extracting module 37-5 determines whether the digital data is voice data or noise data, and determines the unused frequency band by determining the portion of the voice data as the frequency band in use and the portion of the noise data as the unused frequency band. Extract.

Next, the control unit 37 drives the optimum transmission frequency setting module 37-5 to extract a frequency band having the widest width among the frequency bands which are not currently used (ie, S130). The widest frequency band or the extracted unused frequency band is extracted.

The controller 37 sets the extracted intermediate value of the widest frequency band as an optimum transmission frequency (S140). That is, the average value of both end values (frequency currently being used) of the extracted widest frequency band is set as an optimal transmission frequency.

The control unit 37 extracts an audio file corresponding to the key input control signal transmitted from the key input unit 31 from the storage unit 35 (S150).

The decoder 39 decodes the extracted audio file based on the decoding control signal from the control unit 37 and restores the original audio data (S160).

The A / D converter 45 converts the decoded audio file into an analog audio signal based on the D / A conversion control signal from the controller 37 (S170).

The modulator 49 modulates the analog audio signal using the optimum transmission frequency calculated above as the carrier frequency (S180).

Finally, the modulated analog audio signal is amplified by the amplifier 55, and then transmitted to the outside through the antenna unit 57 (S170). Then, the radio 53 tunes the carrier frequency to receive and demodulate the transmitted analog audio signal and output the same through the speaker 54.

Although the present invention has been illustrated and described in the portable audio device, the present invention is not limited to this, but it can be applied to a non-portable audio device and various video devices.

In addition, in the third embodiment, a separate wireless transmit / receive chip 80 is mounted on an internal circuit board (not shown) of the conventional portable audio device 10. In addition, wireless transmit / receive is performed on one side of the outer surface of the portable audio device 10. It is also possible to be provided with a pin for detachably mounting the chip 80.

According to the portable audio device having a wireless transmission / reception function as described above, the portable audio device has an effect of transmitting and outputting an audio file or audio data such as an MP3 to a radio through a preset frequency band.

In addition, the radio transceiver has a function of searching for a frequency band currently being used and extracting an optimal transmission frequency band, and thus, it is possible to more efficiently transmit and output audio files or audio data such as MP3 to the radio and the like. .

In addition, by providing a wireless transmission and reception function in the remote control of the portable audio device, there is an effect that the audio file or audio data such as MP3 can be easily transmitted to the radio and output through the remote control operation.

In addition, by providing a chip for wireless transmission / reception in the portable audio device, the audio file or audio data such as MP3 or the like can be transmitted and output to the radio while using the configuration of the conventional portable audio device as it is.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Therefore, the scope of the utility model registration claims attached will include such modifications or variations that fall within the spirit of the present invention.

Claims (8)

In a portable audio device equipped with a wireless transmission and reception function, A receiver for scanning and receiving a preset frequency band from a radio repeater; A controller for extracting an unused frequency band from the frequency band by a preset method and calculating an optimum transmission frequency among the frequency band by a preset method; A storage unit for storing an audio file; A decoder for decoding an audio file stored in the storage; A D / A converter for converting the decoded audio file into an analog audio signal; And Transmitter for modulating and transmitting the analog audio signal at the optimum frequency calculated by the controller Portable audio device with a wireless transmission and reception function characterized in that it comprises a. The method of claim 1, A key input unit for generating a key control signal corresponding to the received key input; And Display unit for displaying transmission frequency and transmission audio file information Portable audio device having a wireless transmission and reception function, characterized in that it further comprises. The method of claim 1, The transmitter is a portable audio device having a wireless transmission and reception function, characterized in that transmitted to a predetermined output range. A remote control connected to a portable audio device and provided with a wireless transmission / reception function, A receiver for scanning and receiving a preset frequency band from a radio repeater; A controller for extracting an unused frequency band from the frequency band by a preset method and calculating an optimum transmission frequency among the frequency band by a preset method; A remote control interface unit for providing an interface between the portable audio device and the remote controller and receiving an analog audio signal from the portable audio device; And And a transmitter for modulating and transmitting the analog audio signal at an optimal frequency. The method of claim 4, wherein A key input unit for generating a key control signal corresponding to the received key input; And And a display unit for displaying the transmission frequency and the transmission audio file information. In the wireless transmission chip embedded in a portable audio device, A receiver for scanning and receiving a preset frequency band from a radio repeater; A controller for extracting an unused frequency band from the frequency band by a preset method and calculating an optimum transmission frequency among the frequency band by a preset method; A chip interface unit providing an interface between the portable audio device and the chip for wireless transmission and reception, and receiving an analog audio signal from the portable audio device; And And a transmitter for modulating and transmitting the analog audio signal at an optimal frequency. In a portable audio device with a chip for wireless transmission and reception, Portable audio device, characterized in that the chip for wireless transmission and reception of claim 7. The method according to any one of claims 1, 4 or 6, And the optimum frequency extracting unit extracts the widest frequency band among the unused frequency bands, and sets an intermediate value of the frequency bands to an optimum frequency.