KR20060110689A - Portable audio player with karaoke function and method thereof - Google Patents

Abstract

A portable audio player having a Karaoke function and a method therefor are provided to increase the satisfaction of a user by portably and simply using the Karaoke function and selectively reproducing an image signal corresponding to a selected song when the song is selected after the Karaoke function is executed. A memory unit(130) stores at least one or more accompaniment data, words data, original sound data, and image data. An input unit(110) receives a song selection command for selecting a certain song. An audio signal processing unit(140) reads accompaniment data corresponding to the song selection command from the memory unit(130), and reproduces an accompaniment signal. A caption processing unit(152) reads words data corresponding to the song selection command from the memory unit(130), and reproduces a words signal. A control unit(120) selects certain image data corresponding to a song selected by the song selection command among the image data stored in the memory unit(130). An output unit(190) outputs the accompaniment signal, the words signal, and an image screen signal reproduced from the audio signal processing unit(140) and the caption processing unit(152).

Description

Portable audio data reproducing device for having karaoke ability and method

1 is a block diagram showing the configuration of a portable audio playback apparatus according to an embodiment of the present invention;

FIG. 2 is a block diagram illustrating an example of a configuration of a score scoring unit used in the portable audio player of FIG. 1;

3 is a flowchart illustrating an audio reproduction method according to an embodiment of the present invention;

4 is a flowchart for explaining an example of a method of selecting image data corresponding to a selected song, and

5 is a flowchart illustrating an example of a scoring method of the portable audio playback apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawing

110: input unit 120: control unit

130 memory unit 140 audio signal processing unit

150: video signal processor 151: video playback unit

152: subtitle processing unit 160: score scoring unit

170: voice processing unit 180: voice input unit

190: output unit

The present invention relates to a portable audio playback apparatus and a method thereof, and more particularly, when a selection is made, selectively outputs a video image signal corresponding to the selected song, and compares the score with the MP3 original song signal to obtain an accurate scoring result score. The present invention relates to a portable audio reproducing apparatus having a karaoke function and a method thereof.

In the past, karaoke systems have been popularized as the play culture through songs and dances became popular, and the karaoke system that implements these karaokes basically outputs accompaniment music, lyrics information, and video data. When the voice signal is input, it is synthesized with accompaniment music and outputs together.

In addition, when executing the karaoke function through the conventional karaoke system, it was common to output image data unrelated to the song on the screen. That is, the karaoke system stores several image data, and when a predetermined song is selected, the karaoke system repeatedly reproduces each image data sequentially. As a result, the song and the image is not matched, there is a problem that the user's fun is halved.

For example, although light dance music was selected, an image such as a calm river or the sea was displayed on the screen, and the user's entertainment could be halved.

In addition, when the song ends, the conventional karaoke system compares only the beats (or beats) between the voice signal input by the user and the accompaniment music. That is, the scoring result was calculated by subtracting a predetermined score from a reference score of 100 according to the degree of inconsistency between the beat (or beat) of the accompaniment music and the beat (or beat) of the voice signal input by the user. Accordingly, there has been a problem that accurate scoring is not achieved.

The present invention is to solve the above-described problems, the object of the present invention is to carry the karaoke function easily and portable, and when the karaoke function is executed and the selection is made, by selectively playing the video signal corresponding to the selected song by In addition, the present invention provides a portable audio player and a method for increasing the user's satisfaction.

Still another object of the present invention is to provide a portable audio playback apparatus and method capable of providing accurate scoring results by comparing and scoring the sound, melody and pattern of the original signal.

Portable audio playback apparatus according to an embodiment of the present invention for achieving the above object, the memory unit is stored at least one or more accompaniment data, lyrics data, original sound data and video data, selection command for selecting a predetermined song An input unit providing a function of receiving an input, an accompaniment data corresponding to the selection command from the memory unit, an audio signal processing unit reproducing an accompaniment signal, and lyrics data corresponding to the selection command from the memory unit, A caption processing unit for reproducing the lyrics signal, a control unit for selecting predetermined image data corresponding to the song selected by the selection command from the image data stored in the memory unit, and the audio signal processing unit and the subtitle processing unit Outputting the accompaniment signal, the lyrics signal, and the video screen signal; It includes an output unit.

And a video reproducing unit which reads the video data selected by the control unit from the memory and reproduces the video screen signal.

Preferably, the controller may operate in one of an MP3 playback mode for playing an MP3 file previously stored in the memory and a karaoke mode for performing a karaoke function according to a mode selection command input through the input unit. .

When the controller operates in the MP3 playback mode, the audio signal processor plays MP3 files previously stored in the memory under the control of the controller.

Preferably, the apparatus further includes a voice input unit providing a function of receiving an external voice signal, and a voice processing unit amplifying the voice signal input through the voice input unit to a predetermined size and then outputting the output to the outside through the output unit. can do.

More preferably, after synthesizing the audio signal and the accompaniment signal to generate a synthesized signal, the original song signal corresponding to the accompaniment signal is read from the memory and compared with the synthesized signal to calculate a predetermined scoring result score. The score scoring unit may further include. In this case, when the output of the accompaniment signal, the lyrics signal, and the video screen signal is finished, the controller controls the output unit to display the scoring result score on the screen.

The score scoring unit divides the synthesized signal and the original signal into a predetermined time period, and detects a voltage value corresponding to the frequency of each of the synthesized signal and the original signal under each divided section. A first calculating unit calculating a difference value of a predetermined magnitude corresponding to the difference value after calculating a difference value between the detected composite signal and the voltage value of each of the original signal signal, and a subtraction calculated under each divided section After summing the values, the sum may be subtracted from a predetermined reference score, and the second calculation unit may provide a subtraction result value to the output unit as the scoring result score.

The controller may check at least one piece of information of the genre, tempo, singer name, and mood of the song selected by the selection command, and then select image data corresponding to the checked information.

The accompaniment signal and the original song signal may be MP3 file format signals, respectively. In this case, the memory unit preferably includes a hard disk memory.

According to an embodiment of the present invention, in the audio reproducing method of a portable audio reproducing apparatus in which a plurality of image data is stored, (a) when a selection command for selecting a predetermined song is input, accompaniment corresponding to the selection command is performed. Reproducing and outputting a video signal and a lyric signal; (b) selectively reproducing the video data corresponding to the song among the plurality of video data and outputting a video screen signal; and (c) receiving an audio signal input from the outside. Mixing and outputting the accompaniment signal, and (d) outputting a score corresponding to an input state of the audio signal when output of the accompaniment signal, the pseudo signal, and the video screen signal is terminated. do.

Preferably, the step of checking whether or not to receive a mode selection command for selecting one of the MP3 playback mode for playing the MP3 file and the karaoke mode performing the karaoke function, the mode selection command for selecting the MP3 playback mode is And if it is determined that the received MP3 music file is outputted, and if it is determined that a mode selection command for selecting the karaoke mode has been received, performing steps (a) to (d). can do.

Also preferably, the step (b) may include: classifying a plurality of songs by song genre, designating and storing image data corresponding to each genre, and when the selection command is input, And selecting image data corresponding to the genre to which the selected song belongs.

More preferably, in the step (b), after classifying a plurality of songs into at least one tempo group according to the song tempo, and designating and storing image data for each tempo group, when the selection command is input, Determining a tempo of the song selected by the selection command, and selecting image data corresponding to a tempo group to which the tempo of the selected song belongs.

On the other hand, the step (d), the step of detecting a voltage value corresponding to the frequency magnitude of each of the synthesized signal and the original music signal mixed with the audio signal and the accompaniment signal every predetermined time period, the voltage detected for each time period Calculating a difference value of a predetermined size corresponding to the difference value, summing the calculated difference value for each time period, and calculating the sum value from a predetermined reference score. After subtracting, the method may include outputting the subtraction result as a scoring result score.

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

1 is a block diagram showing the configuration of a portable audio playback apparatus according to an embodiment of the present invention. According to FIG. 1, the portable audio player includes an input unit 110, a controller 120, a memory unit 130, an audio signal processor 140, an image signal processor 150, a scorer 160, and a voice processor. 170, a voice input unit 180, and an output unit 190.

The input unit 110 serves to receive a predetermined selection command from the user. That is, the user may input various selection commands such as a mode selection command, a selection command, a reservation command, a pitch control, a beat control, and the like by operating a button key provided in the portable audio player main body or the remote controller. The mode selection command means a command for selecting an operation mode of the portable audio player. According to the mode selection command, the portable audio player operates in one of an MP3 playback mode for playing MP3 music files and listening to music and a karaoke mode for performing a karaoke function. The input unit 110 notifies the control unit 120 of the input selection command.

When the mode selection command for selecting the MP3 playback mode is input through the input unit 110, the controller 120 controls the audio signal processor 140 to play the MP3 file. The audio signal processor 140 sequentially or randomly selects an MP3 file stored in the memory 130, processes the signal, and outputs the signal through the output unit 190. The portable audio playback apparatus under the MP3 playback mode operates in the same manner as a conventional MP3 player.

Meanwhile, when the mode selection command for selecting the karaoke mode is input, the controller 120 provides the karaoke function. That is, when a selection command is input, the audio signal processing unit 140 reads accompaniment data corresponding to the selected song from the memory unit 130, and processes the amplification, D / A converting, and the like as an accompaniment signal. . The reproduced accompaniment signal is output through the output unit 190. The audio signal processor 140 reproduces the accompaniment signal by decoding the accompaniment data using a codec corresponding to a file format and converting the accompaniment data into an analog signal.

The controller 120 controls the image signal processor 150 to provide lyrics information and image data corresponding to the selected song. The image signal processor 150 includes an image reproducer 151 and a subtitle processor 152.

The caption processing unit 152 reads the lyrics data stored in the memory unit 130 and performs graphic processing to reproduce the lyrics signal in text.

The accompaniment data and the lyrics data described above may be downloaded from an external server or a memory card and stored in the memory unit 130. In this case, the accompaniment data may be stored as a general MIDI (Musical Instrument Digital Interface) file or an MP3 (MPEG-1 Audio Layer-3) file. A typical MIDI score file uses about 4KB of music per song, while an MP3 file uses about 4MB of music per song. Therefore, when using accompaniment data in the form of MP3 files, the memory unit 130 may be implemented as a hard disk which is a large memory.

The memory unit 130 also stores image data in addition to accompaniment data. The image reproducing unit 151 selectively reads predetermined image data from the memory unit 130, converts the image data into a video image signal, and reproduces the image data. When a selection command is input, the controller 120 controls the image reproducing unit 151 to selectively reproduce one of a plurality of image data stored in the memory unit 130.

To this end, image data corresponding to each song genre may be designated and stored in the memory unit 130. For example, video data containing an image suitable for the genre atmosphere is specified for genres such as ballad, rock ballad, dance, hip hop, trot, pop, and jazz. The controller 120 may determine the genre of the accompaniment signal by checking the additional data recorded in the accompaniment signal. Accordingly, the image reproducing unit 151 is controlled to reproduce the image data corresponding to the genre.

Meanwhile, after each song is classified into a plurality of tempo groups according to the tempo, image data corresponding to each tempo group may be designated and stored in the memory unit 130. For example, it is classified into a high tempo group, a middle tempo group, and a low tempo group according to the number of syllables played per minute. Accordingly, image data having a high screen development speed is matched to a high tempo group, and image data of medium speed or slow speed is matched to a middle tempo group or a low tempo group, respectively. In this case, the controller 120 checks the tempo of the selected song when the song is selected. Accordingly, the video data corresponding to the tempo group to which the selected song belongs can be designated.

In addition, the image data may be classified and designated according to the singer's name of the song, the song atmosphere, and the like. Accordingly, it is possible to select and play a video screen or the like in which the singer who sings the selected song appears.

The output unit 190 outputs the accompaniment signal, the image screen signal, and the lyrics signal reproduced from the audio signal processor 140, the image reproducing unit 151, and the subtitle processing unit 152. The output unit 190 may be divided into an audio output unit that outputs an audio signal such as an accompaniment signal, and an image output unit that outputs a visible signal such as a lyrics signal or a video screen signal. The sound output unit may be implemented as a speaker, a headset, an earphone, or the like.

The output unit 190 may further include an analog amplifier or digital amplifier for amplifying and outputting an audio signal such as an accompaniment signal to a predetermined size.

The image output unit may be implemented as a display screen such as an LCD monitor or a CRT. On the other hand, the audio signal processing unit 140, the image reproducing unit 151 and the subtitle processing unit 152 reproduces the signal in accordance with a predetermined synchronization signal, the accompaniment of the lyrics and the video screen displayed on the screen match Let it go.

The synchronization signal is generated by the controller 120 or a predetermined oscillator circuit and provided to the audio signal processor 140, the image reproducing unit 151, and the subtitle processor 152.

The voice input unit 180 is a component that receives a voice of a user. The voice input unit 180 may be implemented by a microphone. Accordingly, the voice of the user is converted into an electrical signal and transmitted to the voice processor 170. Preferably, the voice input unit 180 may be implemented as a wireless microphone. Meanwhile, the voice processor 170 amplifies the user's voice and then filters the noise signal and outputs the noise signal to the output unit 190. The voice signal output from the voice processor 170 is mixed with the accompaniment signal reproduced by the audio signal processor 140 and output from the output unit 190 through the speaker.

Meanwhile, the score scoring unit 160 scores the score by comparing the user's voice signal and the original song signal. In this case, the score can be scored by comparing not only the beat of the audio signal and the original song signal but also the pitch itself. For time signature comparison, the output timings of the audio signal and the original song signal are compared. That is, the larger the number of discrepancies between the original signal output point and the audio signal output point, the larger the score is subtracted from the reference score.

On the other hand, in order to compare the melody and the pattern, the frequency response of each of the audio signal and the original song signal is compared. That is, after confirming the frequency characteristics of each of the audio signal and the original music signal, the scoring result score is calculated according to the comparison result.

2 is a block diagram showing the configuration of the scoring unit 160 used in the portable audio playback apparatus according to an embodiment of the present invention. The scoring unit 160 according to FIG. 2 includes a voltage value detector 161, a first operator 162, and a second operator 163.

The voltage value detector 161 checks the frequency characteristics of each of the synthesized signal and the original song signal mixed with the audio signal and the accompaniment signal, and outputs a voltage value having a predetermined magnitude corresponding to the frequency. Specifically, each of the synthesized signal and the original signal signal is divided into predetermined time periods, and each signal is Fourier Transformed into each frequency section to be converted into a frequency signal. Accordingly, a voltage value having a magnitude corresponding to the center frequency of each converted signal is output.

The first calculator 162 calculates a difference between the voltage values detected by the voltage value detector 161 in each section of the synthesized signal and the original signal. As a result, a subtraction value of a magnitude proportional to the difference value is calculated. Specifically, when the range of the subtraction value is limited to 0 to 5 points, if the pitch difference (i.e., the difference in frequency magnitude) between both signals is large, the subtraction value is calculated to 4 or 5 points, and if the pitch difference is small 1 Or it can calculate by two points.

The second calculator 163 adds the subtraction values calculated under each divided section, and then subtracts the sum value from a predetermined reference score. For example, if the total sum is 35 points, 35 points are subtracted from 100 points, and the final score is calculated to be 65 points. The subtraction result value is provided to the output unit 190 as a scoring result score, and the output unit 190 displays it on the screen.

Meanwhile, the first calculator 162 may calculate the subtraction value by counting the number of sections in which the detected voltage value is different for each signal. For example, when the synthesized signal and the audio signal are respectively divided into 90 sections, the first calculator 162 counts sections in which the detected voltage value of each signal differs by more than a predetermined value. Accordingly, if the counted section is 30 sections, the second calculating unit 163 provides the total (100 * 60) / 90 ≒ 67 points to the output unit 190 as the final scoring result score. As described above, by comparing the original music signal with the pitch itself, much more accurate scoring is possible.

On the other hand, when considering the time signature, the first calculating unit 162 may calculate the subtraction value by comparing the output timing of each of the synthesized signal and the audio signal. Accordingly, the second calculating unit 163 can calculate the final scoring result by adding up all the deduction values calculated by the first calculating unit 162 and subtracting from the reference score.

3 is a flowchart illustrating an audio reproduction method according to an embodiment of the present invention.

According to an embodiment of the present invention, an operation mode is first selected. The operation mode may be an MP3 playback mode for playing and outputting an MP3 music file and a karaoke mode for implementing a karaoke function.

When the MP3 playback mode is selected, the portable audio playback apparatus operates in the same way as a normal MP3 player. Therefore, description of the case where the MP3 playback mode is selected will be omitted, and the audio reproduction method will be described assuming that the case is selected as the karaoke mode.

First, when a predetermined song is selected (S310), image data corresponding to the selected song is selected (S320). The selection method may be variously set. That is, corresponding video data is selected according to genre information, song tempo, singer name, mood, etc. to which the selected song belongs. In this case, genre information, a singer's name, and mood may be confirmed through additional information added to the accompaniment signal of the selected song. The song tempo can be confirmed by counting the number of syllables of the accompaniment signal output per predetermined unit time.

Accordingly, the selected video data is reproduced and the video screen signal is output on the display screen (S330). In this case, the accompaniment signal and the lyrics signal of the selected song are also output through the speaker in synchronization with the video screen signal (S330).

The user inputs a voice to accompaniment using a microphone or the like. Accordingly, the input voice signal is mixed with the accompaniment signal and output (S340). As a result, when the output is completed up to the last syllable of the accompaniment signal (S350), and compared with the original song signal is scored (S360). A specific scoring method is mentioned later.

4 is a flowchart illustrating a specific process of selecting corresponding image data according to a genre of a selected song.

According to the flow of FIG. 4, if the song belongs to the ballad genre (S410), image data corresponding to the ballad is selected (S420). Image data corresponding to the ballad may be data such as a calm lake scene, a romantic movie, a music video of a ballad singer, and the like.

On the other hand, if the song is a dance genre (S430), the video data corresponding to the dance is selected (S440). For example, the data may be a violent car race scene, an action movie, a music video of a dance singer, and the like.

If the song is a trot genre (S450), video data corresponding to the trot is reproduced (S460). For example, it may be data such as an exciting home market scene, a trot singer's music video, or the like.

As described above, in order to select image data that matches the song mood, the manufacturer or user of the portable audio reproducing apparatus designates and stores each song genre when storing the image data.

5 is a flowchart illustrating a scoring method in the portable audio playback apparatus according to an embodiment of the present invention.

Referring to FIG. 5, when a song is selected and an accompaniment signal, a caption signal, a video screen signal, and the like are output, when an audio signal is input (S510), the input voice signal is subjected to a predetermined process such as amplification and filtering. The accompaniment signal is mixed and output through the speaker (S520). In this case, in order to compare the synthesized signal mixed with the audio signal and the accompaniment signal and the original signal signal, each signal is divided at predetermined time periods (S530). Accordingly, the synthesized signal and the original signal are converted into frequency signals under each divided time interval, and the frequency magnitude is checked, and a voltage value corresponding to the identified frequency is detected (S530). To this end, a filter for dividing each frequency signal into a predetermined frequency band, a frequency to voltage converter, or the like may be used.

Accordingly, the difference value between the detected voltage values for each period is calculated (S540). If the calculated difference is greater than or equal to a predetermined magnitude, it means that the synthesized signal and the original music signal are somewhat different, that is, the user's sound is different from the original music signal. When the difference value is greater than or equal to the predetermined size, a subtraction value corresponding to the difference value is calculated (S550). Accordingly, when the output is completed by the final period of the accompaniment signal, the deduction value calculated in the entire section is added (S560), and subtracted from the reference score (S570). Accordingly, the scoring result score is finally calculated (S570). As described above, the final scoring result score may be calculated by counting the number of sections having a difference value greater than or equal to a predetermined size. In addition, the interval of the wrong beat may be counted and reflected in the scoring result score. Since the detailed description thereof has been described above, duplicate description thereof will be omitted.

As described above, the present invention has been described with reference to a portable audio player, but is not limited thereto. Karaoke functions in various devices including a display screen, such as a karaoke system, a TV, a PC, a notebook PC, an MP3 player, a mobile phone, and the like, are described. Will be applied to various electronic devices to implement.

As described above, according to the present invention, when a song is selected, by selectively playing the video signal corresponding to the mood of the song, the interest of the user who wants to sing the song can be increased.

In addition, by using the hard disk memory, the accompaniment signal file or the original music signal file can be stored as an MP3 file. Accordingly, in the scoring process, accurate scoring is performed by comparing the pitch between the synthesized signal mixed with the user's voice signal and the accompaniment signal and the original song signal.

In addition, since it is portable, anytime, anywhere can easily implement karaoke function.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (15)

A memory unit for storing at least one accompaniment data, lyrics data, original sound data, and image data; An input unit providing a function of receiving a selection command for selecting a predetermined song; An audio signal processor which reads accompaniment data corresponding to the music selection command from the memory unit and reproduces the accompaniment signal; A caption processing unit which reads lyrics data corresponding to the music selection command from the memory unit and reproduces the lyrics signal; A control unit for selecting predetermined image data corresponding to the song selected by the selection command from the image data stored in the memory unit; And, And an output unit for outputting the accompaniment signal, the lyrics signal, and the video screen signal reproduced from each of the audio signal processor and the subtitle processor. The method of claim 1, And a video reproducing unit for reproducing a video screen signal by reading the video data selected by the controller from the memory. The method according to claim 1 or 2, The control unit, According to a mode selection command input through the input unit, the portable audio playback device characterized in that it operates in one of the MP3 playback mode for playing back the MP3 files stored in the memory and the karaoke mode for performing the karaoke function. The method of claim 3, The audio signal processor, And when the controller operates in the MP3 playback mode, the MP3 file pre-stored in the memory under the control of the controller. The method according to claim 1 or 2, A voice input unit providing a function of receiving an external voice signal; And, And amplifying a voice signal input through the voice input unit to a predetermined size and outputting the voice signal to the outside through the output unit. The method of claim 5, A score grading unit that synthesizes the voice signal and the accompaniment signal to generate a synthesized signal, and then calculates a predetermined scoring result score by reading the original music signal corresponding to the accompaniment signal from the memory and comparing the synthesized signal with the synthesized signal; More; And the controller controls the output unit to display the scoring result score on the screen when the accompaniment signal, the lyrics signal, and the video screen signal are output. The method of claim 6, The score scoring unit, A voltage value detector for dividing the synthesized signal and the original song signal into predetermined time periods and detecting voltage values corresponding to frequencies of each of the synthesized signal and the original signal under each divided section; A first calculating unit calculating a difference value of a predetermined magnitude corresponding to the difference value after calculating a difference value between the synthesized signal detected in a predetermined section and the voltage value of each of the original signal signal; And, And a second operation unit which adds the subtraction value calculated under each of the divided sections, subtracts the sum value from a predetermined reference score, and provides a subtraction result value to the output unit as the scoring result score. Portable audio player. The method of claim 6, And the accompaniment signal and the original song signal are MP3 file format signals, respectively. The method according to claim 1 or 2, The control unit, And confirming at least one piece of information of the genre, tempo, singer name, and mood of the song selected by the selection command, and then selecting image data corresponding to the confirmed information. The method according to any one of claims 1 to 9, The memory unit, A portable audio playback device comprising a hard disk memory. In the audio playback method of a portable audio playback device that stores a plurality of video data, (a) when a selection command for selecting a predetermined song is input, reproducing and outputting an accompaniment signal and a lyrics signal corresponding to the selection command; (b) selectively reproducing image data corresponding to the song from among the plurality of image data and outputting a video screen signal; (c) mixing the audio signal input from the outside to the accompaniment signal and outputting the mixed accompaniment signal; And (d) outputting a score corresponding to an input state of the audio signal when output of the accompaniment signal, the lyrics signal, and the video image signal is completed. The method of claim 11, Checking whether to receive a mode selection command for selecting one of an MP3 playback mode for playing an MP3 file and a karaoke mode for performing a karaoke function; If it is determined that a mode selection command for selecting the MP3 playback mode is received, playing and outputting a predetermined MP3 music file; And, And if it is determined that a mode selection command for selecting the karaoke mode has been received, performing the steps (a) to (d). The method of claim 11, In step (b), Classifying a plurality of songs by song genres, and designating and storing image data corresponding to each genre; And, And when the selection command is input, selecting image data corresponding to a genre to which the song selected by the selection command belongs. The method of claim 11, In step (b), Classifying a plurality of songs into at least one tempo group according to a song tempo, and then designating and storing image data for each tempo group; Determining a tempo of a song selected by the selection command when the selection command is input; And, And selecting image data corresponding to a tempo group to which the tempo of the selected song belongs. The method of claim 11, In step (d), Detecting a voltage value corresponding to a frequency magnitude of each of the synthesized signal mixed with the audio signal and the accompaniment signal and the original music signal at predetermined time periods; Calculating a difference value of a predetermined magnitude corresponding to the difference value after calculating a difference value between voltage values detected at each time period; Summing calculated deduction values for each time period; And, Subtracting the sum value from a predetermined reference score and outputting the subtraction result value as a scoring result score.

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