KR20060085340A - A portable mp3 transmitter which enables to optional output among audio, voice, and the text signal - Google Patents

Abstract

The present invention relates to a portable wireless transmission device for outputting audio / voice and lyrics signals, comprising: a sound source input unit for inputting a sound source signal; A sound source distributor for distributing a sound source signal provided from the sound source input unit by a frequency characteristic; A digital signal processor converting an output signal of the sound source distributor into a digital signal, extracting and storing a desired audio signal, and extracting the digital signal into an analog signal; A microcontroller unit which processes and processes digital signals of the digital signal processor and controls respective components; A keypad as an input device for controlling the microcontroller unit; An LCD for displaying the status of the microcontroller unit; A mixer unit configured to receive and mix an input signal from the digital signal processor and a microphone, which is an external input device, and output an audio signal; It is possible to selectively output audio / voice and lyrics signals, comprising a wireless transmitter configured to receive a signal output from the mixer and generate a signal for output to a receiver and a power supply for supplying power. Implement a portable radio transmitter.

Audio Lyrics Output, Audio Signal Converter, Portable Wireless, Wireless Transmitter, MP3

Description

Portable Wireless Transmitter with Selective Output of Audio / Voice and Lyrics Signals {A PORTABLE MP3 TRANSMITTER WHICH ENABLES TO OPTIONAL OUTPUT AMONG AUDIO, VOICE, AND THE TEXT SIGNAL}

1 is a block diagram schematically showing the configuration of a portable radio transmitting apparatus capable of outputting audio / voice and lyrics signals according to the present invention.

FIG. 2 is a schematic diagram showing in detail the configuration of a transmitter in the present invention shown in FIG.

Figure 3 is a block diagram schematically showing the configuration of a portable wireless FM linker for conventional audio signal output

Explanation of symbols on the main parts of the drawings

102: sound source input unit 110: signal selection unit

120: sound source distributor 130: power supply

140: digital signal processor 150: microcontroller unit

160: key input unit 170: LCD unit

180: mixer 186: microphone

188: speaker 190: wireless transmission unit

191: modulator 192: phase locked loop (PLL)

193: voltage controlled oscillator (VCO) 194: RF amplifier

195: filtering unit

The present invention relates to a portable wireless transmission device capable of outputting audio / voice and lyrics signals. More particularly, the present invention relates to an audio signal output from a portable audio device and a voice signal of a user input from an external device. Sily relates to a portable wireless transmitter for audio / voice and lyrics signal output wirelessly with lyrics.

In general, a device used as a portable audio playback device includes, for example, an MP3 player, a cassette tape player, a CD player, an MD player, a player with a built-in mobile phone.

The inventors of the present invention transmit the audio signals output from such portable audio devices, fixed audio devices, PCs, etc. to FM reception radios and wireless microphone receivers provided in homes or vehicles, and output them through speakers. Regardless of the frequency band of the FM receiving wireless microphone used in the country, it has been recognized that a portable wireless transmitting device for outputting audio / voice and lyrics signals can be arbitrarily adjusted and used.

In this regard, Korean Utility Model Registration No. 20-0281453 (registration date; June 27, 2002) published a portable wireless FM linker for audio signal output.

Hereinafter, a configuration and operation of a portable wireless FM linker for outputting a conventional audio signal will be described with reference to the accompanying drawings. 3 is a block diagram schematically showing a configuration of a portable wireless FM linker for outputting a conventional audio signal.

As shown in Fig. 3, the conventional portable wireless FM linker for audio signal output includes an up-down switch 11 which the FM linker user operates to select a transmission frequency; A microcomputer 12 that controls the display of the transmission frequency and the battery status, and controls the power on / off of the FM linker, the output of the PLL data for the RF output control, and the frequency conversion according to the user's up-down switch operation; An LCD unit 13 which displays the current transmission frequency under the control of the microcomputer when the FM linker is turned on, and displays the state of charge of the battery; A memory unit 14 for storing the transmission frequency last used when the power is turned off and automatically using the stored transmission frequency when the power is turned on; A lamp unit 15 turned on when the user operates the up-down switch so that the LCD unit can be checked even in a dark place; A power supply unit 16 for boosting 1.5V battery power to 5V and supplying operation power to each part of the FM linker; A PLL oscillator 17 for oscillating frequencies of 88 to 108 MHz and 78 to 90 MHz based on the PLL data output from the microcomputer; Synthesizes the audio signal input from the portable audio device connected to the FM linker and the transmission frequency oscillated by the PLL oscillator to generate the FM stereo signal, and outputs the RF frequency to the FM receiving radio provided in the home or vehicle through the antenna. An FM IC unit 18; The LPF / PILOT adjusting unit 19 adjusts the signal to fit the characteristics of the FM receiver and synthesizes the PILOT signal for stereo separation before combining the audio signal and the transmission frequency input from the portable audio device.

The operation of the portable wireless FM linker for the conventional audio signal output having the above configuration is already known and a separate description will be omitted.

However, such a conventional device is provided with a wireless FM linker separately from a portable or stationary audio device, and has a problem in that a separate device must be manufactured and carried by connecting and using an earphone jack. Accordingly, since a separate linker device must be provided in addition to the portable audio device, it does not fit the situation that is being simplified and integrated as well as an additional production cost is disadvantageous economically.

In addition, in the case of using a portable wireless FM linker for outputting a conventional audio signal, only the signal output from the audio device can be transmitted wirelessly and can be heard through a speaker in a home or a vehicle equipped with an FM receiver. And, there is a big problem that the device for transmitting the radio by selecting the sound source to be output according to the user's selection or by selecting the user's voice input separately.

 SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its main object is to provide a portable wireless transmission apparatus capable of selectively outputting audio / voice and lyrics signals in which an audio device and a wireless transmission apparatus are integrally formed.

Another object of the present invention is to select audio / voice and lyrics signals that can separately output various sound sources and voice signals, and can selectively output the user's voice signals while outputting lyrics contained in the sound sources. It is possible to obtain a portable wireless transmission device capable of an output.

According to an aspect of the present invention, a portable wireless transmission apparatus capable of selectively outputting audio / voice and lyrics signals includes: a sound source input unit 102 for inputting a sound source signal; A sound source divider 120 for distributing a sound source signal provided from the sound source input unit 102 by a frequency characteristic; A digital signal processor 140 for converting an output signal of the sound source distributor 120 into a digital signal, extracting and storing a desired audio signal, and then extracting the digital signal and converting the digital signal into an analog signal; A microcontroller unit (150) which processes and processes the digital signal of the digital signal processor (140) and controls each component; A keypad (160) which is an input device for controlling the microcontroller unit (150); An LCD (170) for displaying the state of the microcontroller unit (150); A mixer 180 which receives an input signal from the digital signal processor 140 and a microphone 186, which is an external input device, mixes the input signal, and outputs an audio signal; It can be achieved by including a wireless transmitter 190 for receiving a signal output from the mixer 180 to generate a signal for output to the receiver and a power supply 130 for supplying power.

 In this case, the wireless transmission unit, a modulator for receiving and modulating the signal output from the digital signal processor; A phase synchronization loop unit which receives a signal output from the microcontroller unit and performs phase synchronization; A voltage control oscillator for receiving an output signal of the modulator, a microphone input signal of the user, and a signal from a phase-locked loop unit to control an output signal at a constant voltage; An RF amplifier for amplifying the output signal of the voltage controlled oscillator; It is preferable that the filter is provided with a filter for receiving the output signal of the RF amplifier.

Here, the digital signal processor preferably designates a frequency band range for the input sound source, and stores the sound source having the same characteristics as a plurality of bands.

In this case, it is preferable that the mixer unit mixes and outputs a voice signal directly input by the user through the microphone to a sound source selectively provided from the digital signal processor.

In addition, the wireless transmission unit is preferably configured to output the user's voice input alone, even if there is no signal provided to the sound source.

Hereinafter, the configuration and operation of a portable wireless transmission apparatus capable of selectively outputting audio / voice and lyrics signals according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically showing the configuration of a portable radio transmitting apparatus capable of outputting audio / voice and lyrics signals according to the present invention.

In FIG. 1, reference numeral 102 denotes a sound source input unit 102. The sound source input unit 102 is, for example, a part that receives lyrics of an audio signal and a song provided from an input device such as an MP3, MD, CD, radio, PC, and the like. Receives an audio signal with various sound sources.

The output signal of the sound source input unit 102 is provided to the sound source distributor 120 so as to output a constant audio signal from the sound source input unit 102 of the high level (H), the middle level (M), and the low level (L), respectively. The audio signal is distinguished and the input sound source is separated and output according to the selection of the signal selector 110.

The output signal of the sound source divider 120 is input to a digital signal processor (DSP) 140 which is an integrated circuit capable of processing digital signals in hardware.

The digital signal processor 140 converts the output signal of the sound source divider 120 into a digital signal to separate a desired audio signal, and outputs the signal to output a microcontroller unit (hereinafter referred to as a microcontroller unit). It stores in the memory of 150, and again selects the desired signal from the digitized signal to convert to an analog signal and output.

At this time, the operation of the microcontroller unit 150 controls and supervises the operation of each component, and stores the digital signal of the digital signal processor 140 so that the audio signal can be output even when there is no other input signal. do. In addition, the VOICE DATA of the user's voice or effect sound (or natural sound) provided through the microphone 186 to be described below is input, and receives and stores data such as a sound source, lyrics and a voice signal, and stores an analog signal. It converts and outputs audio.

The lyrics information data of the music output from the microcontroller unit 150 is displayed through the LCD 170 window, and the above-described functions are controlled through the operation of the keypad 160 as an input device.

On the other hand, the digital signal processor 140 processes the signal according to the input sound source. For example, the input sound source may be classified into a signal of an instrument having a specific frequency. That is, when the instrument outputs such as piano (A), cello (B), violin (C), and viola (D) are included in the signals included in the input source, the components can be separately processed for output. .

In this case, the respective sound source signals and the audio signals output from the output of the digital signal processor 140 may be provided to the mixer 180 to combine and output only the signals selected by the user. That is, when a user wants to select and listen to a part of the piano (A), cello (B), violin (C) and viola (D) signals among the signals included in the input source for the purpose of practice or listening training, signal selection The unit 110 may be operated to operate.

More specifically, a case in which a sound source file (signal) is provided from a device such as an MP3 to listen to music will be described as an example. When a user randomly selects a song (including audio and video) as a sound source, the user selects and outputs only the melody and lyrics of the song from the sound source, and directly outputs a song corresponding to the lyrics through the microphone 186 which is a voice input device. I can call. Through this, educational effect can be obtained, and it can be applied to various fields such as using as a song exerciser.

In addition, the output signal of the mixer 180 is transmitted to a receiver (not shown) through an antenna through the built-in wireless transmitter 190. The signal output from the mixer unit 180 transmits PLL DATA to select a desired frequency, and square-wave oscillates 38KHz and 19KHz for stereo transmission and outputs it to the wireless transmitter 190.

Here, the operation of the mixer 180 will be described in detail. First, the analog audio signal is received from the output of the digital signal processor 140, and the selected audio signal is mixed with the audio signal provided from the user's microphone 186. The audio signal may be separated into a signal of the right (R) and the left (L) and output. The signal may be input to the wireless transmitter 190 and transmitted as a stereo signal.

The LCD 170 displays and displays various operating states of the portable radio transmitter capable of selectively outputting audio / voice and lyrics signals according to the present invention. In detail, the status display of the input power input through the power supply unit 130, the operation display of the sound source distributor 120, the operation and output display of the digital signal processor 140, the memory of the microcontroller unit 150 In addition to displaying the status, the status of the keypad 160, the operation of the microphone 186, the operation of the speaker 188, the operation of the mixer 180, and the operation of the wireless transmitter 190, Displays the antenna output status, the sound source input status display, the operation display of the signal selector 110, the lyrics operation of the song included in the sound source, and displays the lamp to check the LCD in the dark through the LCD 170 .

The illustrated operation of the power supply unit 130 charges the battery through a constant voltage constant current at 5V through an external DC input, and inputs the voltage and current into each component. At this time, the built-in battery is composed of a DC / DC circuit capable of boosting the power to a voltage of 2.8VDC to supply a voltage of DC5V to each part.

The keypad 160 is for controlling the above-described components, a switch for controlling the type of sound source, a selection switch for the operation of the sound source distributor 120, and a selection operation of the digital signal processor 140. Switch for controlling, a switch for selecting a type in the mixer unit 180, a switch for determining the type of audio to be transmitted, a switch for inputting a frequency, a switch for controlling the output of the speaker 188, a microphone 186 on / It is configured to include a switch for controlling the off and a switch for controlling the power of the entire device on and off. All the switches are configured to minimize the input port by using a scan control method.

Next, the speaker 188 described above is used for a device such as a general MP3, and comprises a speaker for outputting its own audio signal at the time of audio output, and an external signal output terminal that can be output to an external audio device or earphone. do.

Next, the configuration and operation of the wireless transmitter 190 will be described with reference to FIG.

FIG. 2 is a schematic diagram showing in detail the configuration of a transmitter in the present invention shown in FIG.

As shown, the wireless transmitter 190 applied to a portable wireless transmitter capable of selectively outputting audio / voice and lyrics signals according to the present invention receives and modulates a signal output from the digital signal processor 140. A modulator 191; A phase-locked loop (PLL) 192 for receiving a signal output from the microcontroller unit 150 to perform phase synchronization; Voltage controlled oscillator (VCO) for controlling the output signal with a constant voltage received from the output signal of the modulation unit 191, the input signal of the microphone 186 of the user, the phase synchronization loop unit 192 An RF amplifying unit (RF AMP) 194 for amplifying an output signal of the voltage controlled oscillator 193; A low pass filter 195 is provided to receive and filter the output signal of the RF amplifier 194.

Here, the modulator 191 receives an input signal of 38KHZ, a right (R) input signal and a left (L) input signal included in the sound source audio.

In addition, the phase locked loop unit 192 receives an input signal stored in a memory of the microcontroller unit 150 and oscillates a frequency required for the voltage controlled oscillator 193.

Next, the voltage controlled oscillator 193 receives an input signal from the modulator 191, the phase synchronization loop 192, and the user's microphone 186 and outputs a constant signal. The signal is amplified by the RF amplifier 194 and provided to the filtering unit 195. In this case, the filtering unit 195 is preferably a low pass filter.

The operation of the wireless transmitter 190 according to the present invention configured as described above will be described in more detail.

First, the modulator 192 receives the PLL data output from the microcontroller unit 150 to set a frequency, and sets the audio output of the mixer 180 to the right (R) and left (L) signals and the user. The audio input from the microphone 186 is received and modulated.

At this time, the modulation method applied may use the method of F3E, etc., and by using a modulator capable of stereo audio modulation and microphone modulation, it is possible to simultaneously modulate the 38KHz and 19KHz signal of the microcontroller unit 150 to stereo transmission Do. Further, the voltage of the signal is controlled through the voltage controlled oscillator 193 capable of selecting the FM frequency band and the frequency of the wireless transmitter 190. The output signal of the voltage controlled oscillator 193 is provided as a feedback signal of the RF amplifier 194 for RF amplification and the phase-locked loop unit 196. The signal amplified by the RF amplifier 194 is transmitted via an antenna through the filtering unit 195.

In this way, when the user uses the MP3 device, the user can select a sound source according to the user's selection, for example, the user inputs a voice directly through a microphone while outputting only the melody and lyrics of the music, and the sound through the speaker. You can also practice singing while printing.

The microphone 186 receives an external human voice or an external sound effect (natural sound) and receives the audio signal through an automatic gain control circuit (Aotomatic Gain Control) built in the voltage control oscillator 193. The audio signal is provided to the mixer 180 as described above and output through the wireless transmitter 190. In this case, when the FM transmission frequency according to the present invention is set to be utilized in various spectrums such as 88 to 108 MHz or 78 to 90 MHz, or a wireless microphone band, audio / voice having a wireless transmission function without being limited to a specific country or region and A portable wireless transmission device capable of selectively outputting lyrics signals can be implemented.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and the general knowledge in the art to which the present invention pertains without departing from the outline of the present invention. Various changes and modifications will be possible by those who have the same.

According to the configuration according to the present invention as described above, there is an effect that it is possible to obtain a portable wireless transmission device capable of selectively outputting the audio / voice and lyrics signal is composed integrally of the audio device and the wireless transmission device.

In addition, according to the configuration of the present invention, not only can separate and output various sound sources and voice signals, but also audio / voice and lyrics signals that can selectively output the user's voice signal while outputting the lyrics contained in the sound source It is possible to obtain a portable radio transmitting apparatus capable of selectively outputting a.

Claims (5)

A sound source input unit 102 for inputting a sound source signal; A sound source divider 120 for distributing a sound source signal provided from the sound source input unit 102 by a frequency characteristic; A digital signal processor 140 for converting an output signal of the sound source distributor 120 into a digital signal, extracting and storing a desired audio signal, and then extracting the digital signal and converting the digital signal into an analog signal; A microcontroller unit (150) which processes and processes the digital signal of the digital signal processor (140) and controls each component; A keypad (160) which is an input device for controlling the microcontroller unit (150); An LCD (170) for displaying the state of the microcontroller unit (150); A mixer unit 180 which receives an input signal from the digital signal processor 140 and a microphone 186 which is an external input device, mixes the mixed signal, and outputs an audio signal; Audio / voice, characterized in that it comprises a wireless transmission unit 190 for receiving a signal output from the mixer 180 to generate a signal for output to the receiving device and a power supply unit 130 for supplying power And a portable radio transmitter capable of selectively outputting the lyrics signal. The method of claim 1, The wireless transmitter, A modulator for receiving and modulating a signal output from the digital signal processor; A phase synchronization loop unit which receives a signal output from the microcontroller unit and performs phase synchronization; A voltage control oscillator for receiving an output signal of the modulator, a microphone input signal of the user, and a signal from a phase-locked loop unit to control an output signal at a constant voltage; An RF amplifier for amplifying the output signal of the voltage controlled oscillator; And a filtering unit configured to receive and filter an output signal of the RF amplifying unit, wherein the portable radio transmitter is capable of selectively outputting audio / voice and lyrics signals. The method of claim 1, The digital signal processor is a portable wireless transmission capable of selectively outputting audio / audio and lyrics signals, characterized in that the input sound source to specify a frequency band range, and separate and store the sound source having the same characteristics into a plurality of bands Device. The method of claim 1, The mixer unit is capable of selectively outputting audio / voice and lyrics signals to a sound source selectively provided from the digital signal processor and outputting a mixed voice signal directly input through the microphone. Device. The method according to claim 1 or 2, The wireless transmitter is a portable wireless transmitter capable of selectively outputting audio / voice and lyrics signals, characterized in that the user's voice input alone is output even when no signal is provided as a sound source.

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