JP2005107328A - Karaoke machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Karaoke machine with a scoring function that makes it possible to accurately decide whether an actual singing is good. <P>SOLUTION: Pitch variation is made gentle by processing pitch information of guide melody data through an LPF to approximate pitch variation of an actual singing of a singer. Further, singing voice frequency data are processed through an LPF to remove frequency variation based upon whether vibratos etc., are good. The LPF-processed guide melody data and singing voice frequency data are compared with each other to accurately decide whether the singing is good. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an improvement in scoring accuracy in a karaoke apparatus having a singing scoring function.

  Conventionally, some karaoke apparatuses have a scoring function for scoring the skill of a singer. The scoring function that has been practically used in the past compares the pitch extracted from the reference such as a guide melody with the frequency extracted from the singing voice (for example, Patent Document 1), and adds the evaluation of the volume change to this. (Patent Document 2).

Japanese Patent Laid-Open No. 10-49183 JP-A-10-161673

  However, since the guide melody is MIDI data in which notes (note-on event data and note-off event data) are mechanically arranged, the pitch changes mechanically at an accurate beat timing. Therefore, if you sing exactly according to the so-called score, you can get a high score with the scoring function, but such singing is never good and it is not comfortable for the audience.

  On the other hand, providing reference data for scoring in addition to guide melody data is troublesome in creating music data, and it is difficult to apply singing songs of various singers to guide melody data. It was a thing.

  An object of the present invention is to provide a karaoke apparatus with a scoring function that can accurately determine the skill of an actual song by processing the reference data to be close to an actual song.

  In addition, the present invention provides a karaoke apparatus with a scoring function that can accurately determine the skill of actual singing by removing the skill and habit from the singing voice to facilitate frequency determination. The purpose is to do.

  Another object of the present invention is to provide a karaoke apparatus with a scoring function that can accurately determine the skill of actual singing by comparing reference data and singing voice at appropriate timing. And

  In the following means, both the reference data and the singing voice are information on the frequency (pitch).

  According to the first aspect of the present invention, performance means for playing karaoke music and supplying singing melody reference data in synchronization with performance of karaoke music, singing voice input means for inputting singing voice, and supplied reference data Filter means for performing low-pass filtering, and scoring means for scoring the singing voice by comparing the singing voice with the filtered reference data.

  In the present invention, the reference data is low-pass filtered. As a result, mechanical pitch changes are smoothed by discontinuity of the reference data, which can be approached to the actual pitch change of the singer, and by comparing this with the singing voice, more practical skill is supported. Scoring is possible.

  The invention of claim 2 is a performance means for playing karaoke music and supplying singing melody reference data in synchronization with the performance of the karaoke music, singing voice input means for inputting singing voice, and inputted singing voice. Filter means for performing low-pass filtering, and scoring means for scoring the singing voice by comparing the filtered singing voice with the reference data.

  In the present invention, the singing voice is low-pass filtered. Thereby, fine frequency fluctuations such as vibrato can be removed, and it is possible to prevent the skillful singing from becoming a low evaluation.

  According to a third aspect of the present invention, in the above invention, the performance means outputs the delimiter information of each note of the singing melody, and the scoring means does not score for the predetermined time from the beginning of each note. It is characterized by that.

  When a legato sing is performed, the frequency fluctuates during the transition of a gentle pitch for a predetermined time (for example, about 150 ms) from the beginning of the note. If this section is targeted for scoring, legato singing may be evaluated lower than mechanical singing. Therefore, in the present invention, the legato singing is prevented from being poorly evaluated by removing it from the scoring target for a predetermined time from the beginning of the note.

  According to a fourth aspect of the present invention, in the above invention, the performance means outputs delimiter information of each note of the singing melody, and the scoring means determines the difference between the singing voice and the reference data within a single note period. When the number of samples in the allowable range is equal to or greater than a predetermined number of times, it is determined that the note is acceptable.

  According to a fifth aspect of the present invention, in the first to third aspects of the present invention, the performance means outputs delimiter information of each note of the singing melody, and the scoring means includes the singing voice within a period of one note. Based on the DC value that is the average value of the difference from the reference data and the AC value that is the integrated value of the difference between the DC value and the singing voice, pass / fail is determined for this note. .

  The invention according to claim 6 is a performance means for playing karaoke music and supplying reference data including the pitch of each note of the singing melody and delimiter information in synchronization with the performance of the karaoke music, and singing for inputting the singing voice. It comprises voice input means and scoring means for scoring the singing voice by comparing the singing voice with reference data for each note.

  A seventh aspect of the invention is characterized in that, in the sixth aspect of the invention, the scoring means does not subject the scoring by the comparison for a predetermined time from the beginning of each note.

  The invention according to claim 8 is the invention according to claims 6 and 7, wherein the scoring means includes a predetermined number of samples in which a difference between the singing voice and the reference data is within an allowable range within a single note period. If it is, it is determined that this musical note is passed.

  According to a ninth aspect of the present invention, in the sixth and seventh aspects of the present invention, the scoring means includes a DC value that is an average value of differences between the singing voice and reference data within a period of one note, and the DC Based on the AC value, which is the integral value of the difference between the value and the singing voice, pass / fail is determined for this note.

  In the above invention, the singing is scored in units of musical notes. This makes it possible to make a musically more accurate evaluation than time unit breaks. Further, by evaluating in note units, accurate evaluation is possible in consideration of the pitch shift (DC value) and the vibrato depth (AC value) in the note.

  According to a tenth aspect of the present invention, in the inventions of the fourth, fifth, eighth, and ninth aspects, the scoring means includes: the number of notes determined to be acceptable; The final score is determined using all or part of the range.

  Very high and very low sounds are difficult for a singer, and songs with a wide range are difficult for a singer to sing. The singing depends on the pitch and range of the song sung in this way, and the evaluation changes. Therefore, in the present invention, the final score is determined with reference to the highest note, lowest note, range, etc. of the passed notes, so that the change in evaluation due to the difficulty of the song can be eased and the singing of the singer can be performed with high accuracy. I was able to evaluate.

  As described above, according to the present invention, when a singer's singing is scored, it is possible to score not based on mechanical accuracy but based on the skill of actual singing.

A karaoke apparatus according to an embodiment of the present invention will be described with reference to the drawings.
In a karaoke device, the performance of a karaoke song is the operation of outputting the background video / lyric telop to the monitor while generating the music of the karaoke song, but if the scoring mode is set, in addition to the performance of this karaoke song, the singer's performance The singing voice is scored by comparing it with a reference, and a scoring operation for calculating and displaying the score after the end of the song is executed.

  FIG. 1 is a block diagram of the karaoke apparatus. The karaoke apparatus is composed of a CPU 10 that controls the operation of the entire apparatus and various devices connected thereto. Connected to the CPU 10 are a hard disk 11, a RAM 12, a sound source 13, a mixer (effector) 14, a vocal adapter 19, an MPEG decoder 20, a synthesis circuit 21, and an operation unit 23. The hard disk 11 stores song data for playing karaoke songs, video data for displaying a background video on a monitor, and the like. In the RAM 12, an area for reading out programs and music data, a scoring log area for recording scoring results and the like in the scoring mode are set.

  The sound source 13 forms a musical sound signal in accordance with music data (note event data or the like) input by the music sequencer 31 executed by the CPU 10. The formed tone signal is input to the mixer 14. The mixer 14 gives an effect such as echo to the plurality of musical sound signals generated by the sound source 13 and the singing voice signal of the singer input via the microphone 17 -A / D converter 18. Mix the signal with an appropriate balance. The mixed digital audio signal is input to the sound system 15. The sound system 15 includes a D / A converter and a power amplifier. The input digital signal is converted into an analog signal, amplified, and emitted from the speaker 16. The effect that the mixer 14 gives to each audio signal and the balance of mixing are controlled by the CPU 10.

  The singing voice signal converted into a digital signal by the A / D converter 18 is also input to the vocal adapter 19. The vocal adapter 19 calculates the singing frequency from the input singing voice signal and also calculates the reference frequency input from the music sequencer 31 of the CPU 10. And this singing frequency and a reference frequency are synchronized and it inputs into CPU10 (scoring mode process 34) every 30 ms. As the reference, guide melody data included in the song data is used. The determined frequency is expressed as a cent value from C0.

  The background video data 41 stored in the HDD 11 is encoded in the MPEG2 format, and the background video reproduction program 33 executed by the CPU 10 reads it and inputs it to the MPEG decoder 20. The MPEG decoder 20 converts the input MPEG data into an NTSC video signal and inputs it to the synthesis circuit 21. The synthesizing circuit 21 is a circuit that synthesizes an OSD such as a lyrics telop or a scoring result display on the video signal of the background video. The synthesized video signal is displayed on the monitor display 22.

  The operation unit 23 includes a panel switch interface, a remote control receiving circuit, and the like, and inputs an operation signal to the CPU 10 according to the operation of the panel switch and the remote control device by the user. The CPU 10 detects this operation signal by the operation input processing program 35 and executes a corresponding process. The operation input processing program 35 is included in the system program.

  The panel switch and the remote control device are provided with various key switches for selecting a song number and selecting a mode such as a scoring mode.

  When a song number is input with a panel switch or a remote control device, the operation input processing program 35 detects this and transmits it to the sequencer 30 as a request for a karaoke song. In response, the sequencer 30 reads the song data of the karaoke song identified by this song number from the song data storage area 40 of the hard disk 11. The sequencer 30 includes a song sequencer 31 and a lyrics sequencer 32, and the lyrics sequencer 32 includes a character pattern creation program 32a. The music sequencer 31 reads the data of tracks such as performance data tracks and guide melody tracks in the music data, and controls the sound source 13 with this data to generate performance sounds of karaoke music. The lyrics sequencer 32 reads the data of the lyrics track in the song data, creates a lyrics telop image pattern based on the data, and outputs the image pattern to the synthesis circuit 21. Further, the background video reproduction program 33 reads predetermined background video data in accordance with an instruction from the sequencer 30 and inputs it to the MPEG decoder 20.

  Here, the music data stored in the hard disk 11 will be described with reference to FIG. As shown in FIG. 4A, the song data includes a musical sound track for playing a karaoke song, a guide melody track for generating a guide melody, a lyrics track for displaying a lyrics telop, and a break in the song. The mark data track is written with mark data to be indicated. The song data has a header, audio data, audio data control track, etc. in addition to this, but it is omitted in this figure for the sake of simplicity.

  Each track is described according to the MIDI format. For example, the guide melody track is composed of event data such as note-on event data and note-off event data and timing data indicating the read timing of each event data, as shown in FIG. The note-on event data includes pitch data, and specifies the pitch of a musical tone (guide melody) generated by the note-on. This musical tone continues until the next note-off event data is read out.

  The timing data can be composed of duration data indicating the time interval between the event data, absolute time data indicating the absolute time from the start time of the music, and the like.

  The event data of the musical tone track and the guide melody track is composed of the note event data indicating the pitch, volume, on / off, etc. of the musical tone as described above, and by inputting this note event data to the sound source 13, the sound source Reference numeral 13 sounds or mutes the musical sound corresponding to the event data. The musical sound track is composed of a plurality of tracks (parts) for generating musical sounds of a large number of musical instruments, and the guide melody track is composed of single melody MIDI data for guiding the singing melody.

  Also, mark data indicating various break points in the karaoke song is written in the mark data track. Mark data includes the first chorus mark written at the beginning and the first chorus, the interlude mark written at the first chorus and interlude, the second chorus mark written at the second chorus and the second chorus. There is an ending mark or the like written at the separation between the eyes and the ending, and a rust start mark and rust end mark written at the start / end points of rust in each chorus. This mark is synchronized with the musical tone generated by the performance track and the guide melody track, and is described as a system exclusive message.

  On the other hand, the event data of the lyrics track is sequence data in which the lyrics telop of the karaoke song is implemented by system exclusive data, and has event data different from the musical tone track and the guide melody track. The event data is page break data, lyrics display data, and the like.

  In the performance of karaoke music in the normal mode, the sequencer 30 generates the karaoke performance sound and displays the lyrics telop as described above. In the scoring mode, the scoring process is performed by the scoring mode processing program 34 in addition to this. The action is executed.

  First, with reference to the functional block of FIG. 3, the process of each part at the time of scoring mode is demonstrated. The singing voice signal input from the microphone 17 is converted into a digital voice signal by the A / D converter 18 and input to the vocal adapter 19 (at the same time input to the mixer 14, but only the operation in the scoring mode is described here. To do). In the vocal adapter 19, this digital audio signal is input to the singing frequency detector 102 to detect the singing frequency (cent value).

  On the other hand, reference data is input from the song sequencer 31 to the reference frequency detector 101 in synchronization with the performance of the karaoke song. As described above, guide melody data is used as the reference data. The reference frequency detection unit 101 extracts pitch information from note-on event data of the input MIDI data, and outputs the pitch cent value as a reference frequency.

  The detection of the singing frequency by the singing voice detection unit 102 and the detection of the reference frequency by the reference frequency detection unit 101 are performed in synchronization every 30 ms, and the detection result is input to the scoring mode processing program 34 every 30 ms.

  Further, when note-on / off event data is input from the music sequencer 31, the reference frequency detection unit 101 notifies the scoring mode processing program 34 of note-on information and note-off information at the timing.

  The scoring mode processing program 34 compares the input reference frequency and the singing frequency, and determines whether the note is a pass note or a fail note for each note.

  At the time of determination of this pass / fail note, a low pass filter (LPF) process (105, 106) is performed on the input singing frequency and reference frequency. The LPF process for the reference frequency is a process for smoothening the pitch change of the reference (see FIG. 4A), which is a mechanical pitch sequence, and bringing it closer to a human song. Further, the LPF processing for the singing frequency is processing for obtaining flat singing frequency information by removing techniques such as vibrato.

  FIG. 4A shows an example of guide melody data used as a reference. The reference data is mechanical data in which the pitch changes discontinuously at an accurate beat timing even in a legato section in which notes are continuous. By performing LPF processing on such a discontinuous reference, the pitch gradually changes between notes as shown in FIG. It is possible to make the pitch change similar to that of singing. Note that rest sections where notes are interrupted, places where singing with non-legato, etc. are excluded from the LPF processing. As a result, it is possible to prevent the LPF processing from becoming unnatural due to the data of the section without sound.

  FIG. 6C is a diagram showing an example of singing voice frequency data. The singing voice frequency has a gentle transition (so-called “scribbling”) at the transition of notes (pitch), and has a periodic frequency change such as vibrato in the stretched part of the sound. . By performing LPF processing on this singing voice frequency data, it is possible to remove fine frequency changes such as overshoot and vibrato in the squeaky part, as shown in Fig. 4 (D), and accurately extract the frequency that was sung. Will be able to.

  The audio signal input from the microphone 17 includes various noises as well as the singing audio signal. When the level of the noise component is large, the frequency detection unit 102 may detect the frequency by regarding the noise component as a singing voice signal. If such a noise component is input to the LPF processing unit 106, not only the one sample but also erroneous data will be output after that. Therefore, if there is a sudden pitch change of 150 cents or more, which is difficult to consider as a frequency change of the singing voice, ignore the data (adopt the previous sample data again) and perform LPF processing. , It can prevent adverse effects due to noise.

  Since the data sequence of the singing frequency and the reference frequency is discrete data every 30 ms, the LPF processing unit 106 for the singing frequency uses a secondary filter with a cut-off frequency of 5.5 Hz in order to suitably achieve the above processing. The LPF processing unit 105 for the reference frequency uses a secondary filter having a cutoff frequency of 5 Hz.

  The LPF-processed singing frequency and reference frequency are input to the scoring unit 107. The scoring unit 107 scores the singing frequency in units of notes based on the note-on information / note-off information input from the reference frequency detection unit 101. The scoring unit 107 compares the singing frequency with the reference frequency and calculates the difference (cent value). This difference is calculated at every sample timing (every 30 ms). When the difference is within a predetermined tolerance within a predetermined number of times in one note period, this note is determined to be a passing note. The predetermined number of times may be set in the range of 1 to a plurality of times. When the number of times that the difference is within the predetermined range is less than the predetermined number when the note period ends, this note is determined to be a failed note.

  Here, the LPF processing is performed on both the singing frequency and the reference frequency, but the above-described effects can be obtained even if performed on only one of them. In addition, in scoring pass / fail notes for each note, this LPF process is not essential, and a singing frequency and a reference frequency may be directly compared to perform a scoring process described later.

The processing of the scoring mode processing program 34 will be described with reference to the flowchart.
FIG. 5 is a flowchart showing the input monitoring operation. In this operation, the input from the vocal adapter is monitored. When sample data, that is, a singing frequency and a reference frequency every 30 ms are input (s1), LPF processing is executed for both (s3, s4). As described above, this LPF process may be either one or not. The result of this LPF process is notified to the scoring process (FIG. 6 etc.).

  On the other hand, when note-on information or note-off information is sent from the reference frequency detector 101 (s2), this is notified to the scoring process (s5).

  FIG. 6 is a flowchart showing the scoring process operation. When note-on information is sent from the input monitoring process (FIG. 5), this processing operation is started.

  First, the pitch information is updated based on the inputted note-on information (note-on event data) (s10). That is, in this scoring processing operation, the highest note register and the lowest note register are updated with the pitch information included in the inputted note-on information in order to detect the highest note and the lowest note of the music. When the pitch of the input note-on information is higher than the highest pitch stored in the highest pitch register at that time, the highest pitch register is updated with this pitch. If the pitch of the input note-on information is lower than the lowest pitch stored in the lowest pitch register at that time, the lowest pitch register is updated with this pitch. If the music sequencer 31 detects the highest sound and the lowest sound when reading the music data from the hard disk 11 and notifies the scoring processing program 34 of this detection, this processing in the minimum processing operation is unnecessary. Become.

  Next, it waits until sample data, that is, a singing frequency and a reference frequency that have been subjected to LPF processing, are input (s11). However, even if sample data is input, the processing is started and the first five samples are discarded, and the processing returns to the sample data waiting routine (s11) without performing any processing (s12). This is because, as shown in FIG. 4, since the frequency is not stable for about 150 ms immediately after the start of the note due to a gradual change in frequency (so-called “shakoku”, etc.), this range is excluded from the judgment (scoring) target. This is because.

  As described above, since the first five samples may be greatly deviated from the target frequency, when LPF processing is performed on the singing frequency or the reference frequency, these five samples that are not adopted are subjected to LPF processing of the subsequent sample data. May be deleted from the LPF input so as not to adversely affect the. In this case, when the first five samples are completed, the LPF process may be notified to discard the sample data input so far.

  When sample data after the sixth sample is input, the processing from s13 is executed. In s13, the singing frequency input at that time is compared with the reference frequency to obtain the difference. If this difference is within the allowable range, the processing from s15 is executed, and if it is outside the allowable range, this sample data is discarded and the processing returns to s11. Here, if the cent value of the reference frequency is within ± 50 cents, it is determined that the singing frequency is within the allowable range.

  In this scoring processing operation, if the singing frequency falls within the allowable range even once in the note, it is determined that the note is acceptable, so if the allowable range is determined in s14, the process proceeds to s15. This note is determined as a “pass note”. Then, the process waits at s16 until the note-off information is input. When the note-off information is input, the passing pitch is updated (s17) and the passing note information is output for the score totaling process for counting the final score. (S18).

  Here, the acceptable pitch is a process of storing the highest and lowest sounds among the pitches of the notes determined to be acceptable in this process executed for each note. In other words, when the pitch of the pitch information of the note determined to be acceptable (pitch information included in the note-on information) is higher than the highest pitch stored in the passed highest pitch register at that time Update the highest pass register with this pitch. If the pitch of the note-on information of the note determined to be acceptable is lower than the minimum pitch stored in the minimum pass register at that time, the minimum pass register is updated with this pitch.

  The contents of the passed highest tone register and the passed lowest tone register and the contents of the highest tone register and the lowest tone register are notified to the score totaling process after the music is finished.

  On the other hand, when this note-off information is input without being determined as a pass note (s19), the fail note information is output for the score totaling process (s20).

  FIG. 7 shows the score totaling process. This process is executed when a music end message is sent from the music sequencer 31 or the reference frequency detection unit 101. First, a score is calculated based on the ratio of the total number of notes and the number of accepted notes in this song (s25). Next, advice for music selection is determined based on the highest pitch, the lowest pitch, the range, and the highest pitch, the lowest pitch, and the range of the accepted notes (s26), and these are displayed on the monitor 22 (s27).

  In this operation, advice is only displayed on the basis of the pitch and the range, but if the highest pass sound, the lowest pass tone or the range is excellent, the score may be added.

  In the process of FIG. 6, if the cent difference is within the allowable range even once in the note, it is determined as a passing note, but a plurality of (for example, all) sample data during the note period are checked and within the allowable range. A pass note or a fail note may be determined based on the number of samples. FIG. 8 is a flowchart of the scoring processing operation for monitoring all sample data during the note period.

  FIG. 8 is a flowchart showing another embodiment of the scoring processing operation. When note-on information is sent from the input monitoring process (FIG. 5), this processing operation is started.

  First, a counter that counts samples within an allowable range (OK samples) and samples outside the allowable range (NG samples) is reset (s29). Next, the pitch information is updated based on the inputted note-on information (note-on event data) (s30). This process is the same as the pitch update process (s10) of FIG.

  Next, it waits until sample data, that is, a singing frequency and a reference frequency that have been subjected to LPF processing, are input (s31). However, even if sample data is input, the processing is started and the first five samples are discarded and the processing returns to the sample data waiting routine (s31) without performing any processing (s32). This is because, as shown in FIG. 4, since the frequency is not stable for about 150 ms immediately after the start of the note due to a gradual change in frequency (so-called “shakoku”, etc.), this range is excluded from the judgment (scoring) target. This is because.

  When sample data after the sixth sample is input, the processing from s33 is executed. In s33, the singing frequency input at that time is compared with the reference frequency to obtain the difference. If this difference is within the allowable range, the OK sample counter is counted up (s35), and if the difference is outside the allowable range, the NG sample counter is counted up (s36).

  When note-off information is input in the sample data waiting routine (s37), it is determined whether or not this note is a pass note based on the OK count number (and NG count number) (s38). If it is determined as a pass note (s39), the pass pitch is updated (s40), and pass note information is output for the score totaling process for totaling the final score (s41). If it is determined as a failure note, failure note information is output to the score totaling process (s42).

  Here, the pass note is determined based on criteria such as when the OK count number is equal to or greater than a predetermined value, when the NG count number is equal to or less than a predetermined value, or when the ratio of the OK count number is equal to or greater than a predetermined value. Just do it.

  In the scoring processing operations of FIGS. 6 and 8, the pass note is determined based on the number of OK samples (and NG samples), but the average value (DC value) of the difference between the singing frequency and the reference frequency in a plurality of samples. In addition, the pass note may be determined in consideration of the integrated value (AC value) of the fluctuation amount from the average value (DC value) of each sample data (singing frequency). As a result, it is possible to eliminate so-called passing notes per fluke, or to save a song with a large vibrato from the failing notes.

  The DC / AC determination process will be described with reference to FIG. In FIG. 6A, <reference> is a straight line indicating the reference frequency, and <DC> is a straight line indicating the average value (DC value). Also, the sum of a plurality of <AC> becomes the AC value.

  Even if one or more samples are within the allowable range (within 50 cents difference) and are determined to be acceptable notes, the DC value increases if there are many samples that are within the allowable range at the very minimum. Therefore, if the DC value is large even if there are a predetermined number of OK samples or more, it can be considered that the pitch is out of sync or fluke. Further, when the deep vibrato is applied, the AC value becomes large. However, when the vibrato is large, the deviation of the pitch is audibly relaxed and sounds well.

  In consideration of such an actual auditory impression, a pass / fail judgment range as shown in FIG. That is, if the DC value is within a certain range of plus / minus, it is a passing note (this is almost the same as the operation of FIG. 8), but if the AC value increases, the range of the passing DC value is increased. . This is because pitch deviation is allowed when vibrato is large. As a result, scoring that is close to actuality becomes possible.

  Further, the scoring based on the DC / AC value and the scoring processing operation shown in FIG. 6 or 8 may be combined for scoring.

The block diagram of the karaoke apparatus which is embodiment of this invention The figure which shows the structural example of the song data used with the karaoke apparatus The figure which shows the functional block of the scoring process of the karaoke apparatus The figure explaining LPF processing in the karaoke apparatus The flowchart which shows the input monitoring process of the karaoke device Flow chart showing scoring processing operation of the karaoke apparatus The flowchart which shows the score totaling process of the same karaoke device The flowchart which shows other embodiment of scoring processing operation | movement of the karaoke apparatus. The figure explaining other scoring systems in the karaoke device

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... CPU, 11 ... Hard disk, 12 ... RAM, 13 ... Sound source, 14 ... Mixer, 15 ... Sound system, 16 ... Speaker, 17 ... Microphone, 18 ... A / D converter, 19 ... Vocal adapter, 20 ... MPEG decoder, 21 ... Synthesis circuit, 22 ... Monitor, 23 ... Operation part,
30 ... Sequencer, 31 ... Song sequencer, 32 ... Lyric sequencer, 32a ... Character pattern creation program, 33 ... Background video reproduction program, 34 ... Scoring mode processing program, 35 ... Operation input processing program,
40 ... song data storage area, 41 ... background video storage area, 43 ... scoring log,
DESCRIPTION OF SYMBOLS 101 ... Reference frequency detection part, 102 ... Singing frequency detection part, 105, 106 ... Low pass filter process part, 107 ... Scoring part

Claims (10)

Performance means for playing karaoke songs and supplying reference data of singing melody in synchronization with the performance of karaoke songs;
Singing voice input means for inputting singing voice;
Filter means for low-pass filtering the supplied reference data;
Scoring means for scoring the singing voice by comparing the singing voice with the filtered reference data;
Karaoke device equipped with. Performance means for playing karaoke songs and supplying reference data of singing melody in synchronization with the performance of karaoke songs;
Singing voice input means for inputting singing voice;
Filter means for low-pass filtering the input singing voice;
Scoring means for scoring the singing voice by comparing the filtered singing voice with the reference data;
Karaoke device equipped with. The performance means outputs the delimiter information of each note of the singing melody,
3. The karaoke apparatus according to claim 1, wherein the scoring unit does not mark a predetermined time from the beginning of each note as a target of scoring by the comparison. The performance means outputs the delimiter information of each note of the singing melody,
The scoring means judges that a note is acceptable when a sample in which a difference between the singing voice and reference data is within an allowable range within a single note period is a predetermined number of times or more. The karaoke apparatus according to claim 2 or claim 3. The performance means outputs the delimiter information of each note of the singing melody,
The scoring means has a DC value that is an average value of the difference between the singing voice and the reference data within a period of one note, and an AC value that is an integrated value of the difference between the DC value and the singing voice. The karaoke apparatus according to claim 1, claim 2, or claim 3, wherein pass or fail is determined for the note. A performance means for playing karaoke songs and supplying reference data including the pitches and delimiter information of each note of the singing melody in synchronization with the performance of the karaoke songs,
Singing voice input means for inputting singing voice;
Scoring means for scoring the singing voice by comparing the singing voice with reference data for each note;
Karaoke device equipped with.   7. The karaoke apparatus according to claim 6, wherein the scoring means does not mark the result of the comparison for a predetermined time from the beginning of each note.   The scoring means judges that a note is acceptable when a sample in which a difference between the singing voice and reference data is within an allowable range within a period of one note exceeds a predetermined number of times. The karaoke apparatus according to claim 7.   The scoring means has a DC value that is an average value of the difference between the singing voice and the reference data within a period of one note, and an AC value that is an integrated value of the difference between the DC value and the singing voice. The karaoke apparatus according to claim 6 or 7, wherein a pass or fail is determined for the musical note based on the note.   The scoring means determines the final score by using all or part of the number of notes determined to be acceptable and the highest note, lowest note, or range of notes determined to be acceptable. The karaoke apparatus according to claim 5, claim 8 or claim 9.

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