JP6315469B2 - Karaoke equipment - Google Patents

Description

  The present invention relates to a karaoke apparatus having a basic function of reproducing karaoke performance data and allowing a singer to sing.

  In recent years, along with higher performance of karaoke equipment, those equipped with advanced scoring technology have also become common, while karaoke rooms have been established in many places, and karaoke singing spaces such as karaoke rooms have internal shapes, karaoke It has an acoustic characteristic (frequency characteristic) that depends on the installation position of the equipment and the interior parts. Especially when there is a singing pitch that overlaps with the dip frequency at the singer's position, it gives the singer the impression that the microphone cannot be sucked. Therefore, it is desirable to measure the dip frequency in the singing sound range and correct the singing voice signal of that pitch if there is a pitch that overlaps the dip frequency.

  Conventionally, a karaoke singing space such as a karaoke room always has a specific frequency characteristic (acoustic characteristic). Therefore, based on the measured frequency characteristic, the audio signal is corrected so as to obtain a desired frequency characteristic. Many techniques for sound emission are disclosed.

  For example, as described in Japanese Patent Application Laid-Open No. H10-228707, for a waviness having a large frequency characteristic measured by the characteristic measuring unit, the sound signal is corrected by a rough correction equalizer such as a shelving filter, and the remaining peaks and dip are thereafter corrected. Is to correct the audio signal with a detailed correction equalizer with multiple stages of parametric equalizers and then emit the sound, and use the tone controller that the general correction equalizer and the detailed correction equalizer generally have in the current karaoke device In such a configuration, the resource is effectively utilized, and the current acoustic characteristics with undulation and peak dip are approximately matched with the desired acoustic characteristics.

JP 2008-268257 A

  By the way, there are not so many kinds of pitches (scales) that the singer should sing through the music. For example, the range of 2 octaves from C4 to C6 includes 25 kinds of pitches. High is part of it. The poor suction of the microphone that the singer feels at the singing position happens because one or several of the pitches coincide with the dip frequency of the frequency characteristic of the karaoke room.

  However, in the prior art including the above-mentioned Patent Document 1, in order to bring the entire frequency characteristic of the target karaoke singing space close to a desired one, the frequency characteristic is measured over almost the entire audible frequency range, While trying to correct and trying to make efficient use of resources, it is inefficient and not cost-effective for singers as a means of resolving poor microphone suction at specific pitches There is a problem.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a karaoke apparatus that eliminates the impression that a microphone is poorly sucked without requiring resources such as an equalizer.

  In order to solve the above-mentioned problems, the invention of claim 1 is a karaoke apparatus having a basic function of reproducing karaoke performance data and allowing a singer to sing, and reproducing the karaoke performance data to perform karaoke in the first tuning. Reproducing means for generating performance data, and frequency characteristic measuring means for measuring the frequency characteristic of the karaoke singing space by reproducing the karaoke performance data for measuring the singing pitch range of the karaoke user by the reproducing means according to the first tuning; A frequency characteristic determining means for determining whether or not the measured frequency characteristic of the karaoke singing space includes a dip frequency that overlaps any one of the pitches of the scale according to the first tuning; and the frequency characteristic determination When the dip frequency is present in the karaoke singing space as determined by the means, the first means A reproduction control means for setting the second tuning tuning amount the difference between Ningu 50 cents or less, a configuration having.

In the inventions of claims 2 and 3, “the frequency characteristic measuring means reproduces and emits the karaoke performance data for measurement for sequentially generating musical tones of each pitch in accordance with the first tuning, The collected musical sounds are collected, the volume of each musical tone is compared with a reference volume, and the frequency characteristic of the karaoke singing space is obtained, and the frequency characteristic determining means is adapted to the frequency characteristic of the karaoke singing space. Based on the configuration, the pitch of a musical sound having a volume lower than a reference volume by a predetermined value or more is determined as a dip frequency ”,
“Reserving a predetermined tune and registering it in order to play it in sequence, extracting all the pitches to be sung from the karaoke performance data of the tunes registered in the reservation queue, Only when a pitch that overlaps with the dip frequency is included, the reproduction control unit includes a music determination unit that sets the second tuning ”.

  According to the present invention, the karaoke user's singing pitch range measurement karaoke performance data is reproduced by the reproducing means according to the first tuning, and the frequency characteristic of the karaoke singing space is measured. It is determined whether or not there is a dip frequency that overlaps any one of the pitches of the scale according to one tuning, and if there is a dip frequency as a result of the determination, the difference from the first tuning is 50 cents to the playback means. By setting the second tuning with the following tuning amount, if the tuning change is up to 50 cents, the pitch to be sung can be kept from overlapping the dip frequency. Without the need for resources, it is possible to eliminate the impression that the microphone sucks badly.

It is a block block diagram of the karaoke apparatus which concerns on this invention. It is explanatory drawing of the data for a measurement of FIG. It is a flowchart regarding specific tuning from the frequency characteristic measurement of FIG. It is explanatory drawing of the frequency characteristic measurement of FIG. FIG. 3 is an explanatory diagram of the relationship between pitch and frequency. It is a partial block diagram of other embodiment in the karaoke apparatus which concerns on this invention. It is a flowchart of the music determination process of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a block diagram of a karaoke apparatus according to the present invention, and FIG. 2 shows an explanatory diagram of the measurement data of FIG. In FIG. 1, each karaoke device 11 is connected to a karaoke main body 12 as a main device by wire or wirelessly, and includes a display unit 13, a mixing amplifier 14, a microphone 15 as a sound collecting means, a speaker 16, a remote An input / output device 17 is connected. The mixing amplifier 14 and the speaker 16 constitute sound emission means.

  The display unit 13 displays a normal music selection display, a background image during karaoke performance, and the like. For example, a liquid crystal display (LCD), a plasma display (PDP), and other various displays can be employed. The mixing amplifier 14 mixes a signal collected by the microphone 15 with a music performance signal (including karaoke performance data for measurement) sent from the karaoke main body 12 at a set mixing level, amplifies the signal, and outputs a speaker. 16 is output.

  Here, the mixing amplifier 14 is a so-called digital mixer, and includes a DSP (Digital Signal Processor) that performs mixing processing, equalizing processing, and effect processing. The line system of the speaker 16 is provided with a D / A conversion unit and an amplification unit. An A / D conversion unit is provided in the line system of the microphone 15. The output from the A / D converter is input to the DSP input bus and also input to the scoring means 28 of the karaoke main body 12.

  In the mixing amplifier 14, in the frequency characteristic measurement mode in the mode switching means 31 of the karaoke main body 12 to be described later, the mixing level of the frequency characteristic measurement acoustic signal collected by the microphone 15 is set to zero. This is because when the sound signal for frequency characteristic measurement collected by the microphone 15 is emitted, the sound signal is fed back and an accurate frequency characteristic cannot be measured.

  The remote input / output device 17 transmits / receives data to / from the karaoke main body 12 using a wired system or a wireless system (IR system, Bluetooth (registered trademark) mechanism piconet connection system, etc.) by a terminal transmission / reception unit (not shown). Therefore, at least music selection music registration means 17A as music search means is provided as appropriate. The music selection music registration means 17 </ b> A is a program for searching for music and registering the music selected with a table for music selection in the reservation queue 41 in the karaoke main body 12.

  The karaoke main body 12 includes a bus 20, a central control unit 21, a ROM 22, a RAM 23, a video display control unit 24, a music performance control unit 25, a sound source (synthesizer) 26, a transmission / reception unit 27, a scoring unit 28, a storage unit 30, and mode switching. Means 31, frequency characteristic determination means 32 and reproduction control means 33 are provided as appropriate. In the RAM 23, at least a reservation queue 41 is appropriately formed. The storage unit 30 stores a music database (music DB) 51, a video database (video DB) 52, and a reference database (reference DB) 53. In addition, about each said structure, even if it is an element part which is not directly related to the summary of this invention, in order to show that most can be applied also in the conventional karaoke system, the whole component is demonstrated.

  The central control unit 21 is a physical CPU that performs overall processing control of the system, and performs algorithm processing based on a program stored in the ROM 22. The RAM 23 serves as a work area for developing and executing the various programs, in addition to forming at least a storage area for the reservation queue 41. It is a concept including the case where it is constructed on a hard disk.

  The video display control means 24 is a program or an electronic circuit that outputs the background video extracted from the video DB 52 and the lyrics data of the music extracted from the music DB 51 to the display unit 13 during performance. The music performance controller 25 includes, for example, a sequence program, and drives a sound source (synthesizer) 26 in accordance with the note data extracted from the music DB 51 with the music ID. The output of the sound source 26 is sent to the mixing amplifier 14 as a performance signal. Is output. The music performance controller 25 and the sound source 26 constitute a playback means.

  The music performance control unit 25 has a function of controlling the sound source 26 so as to generate a musical sound according to a predetermined tuning, and the music performance control unit 25 stores original data of karaoke performance data (stored in a music DB 51 described later). When the state is reproduced, the sound source 26 generates a musical sound according to the initial tuning (for example, A4 is 440 Hz) as the first tuning. In order to change the initial tuning to another tuning value (second tuning), the sound source 26 changes the setting of the initial tuning in accordance with the message from the music performance control unit 25, which is a conventionally known method. It is.

  The transmission / reception unit 27 is used to exchange data with the remote input / output device 17 using a wired system or a wireless system (such as an IR system or a Bluetooth (registered trademark) mechanism piconet connection system). Electronic circuit and program.

  The scoring means 28 is a program for scoring a song performed by a singer. Here, the karaoke performance data for measurement as shown in FIG. 2A described later is the same data as the karaoke performance data for singing. By using seeds (musical note data in the MIDI (registered trademark) format described later), it can be used for measuring the acoustic characteristics of the karaoke singing space. That is, the scoring means 28 also constitutes a frequency characteristic measuring means. Instead of the scoring means 28, a new measuring scoring means may be provided for the measurement mode.

  Specifically, a predetermined scoring section (for example, 15 msec) is applied to an acoustic signal (frequency characteristic measurement acoustic signal) that is initially tuned and emitted by the control of the music performance controller 25 and collected by the microphone 15. Scoring is performed by detecting the pitch and volume each time and comparing the detected pitch and volume with the volume of each pitch of corresponding reference data described later. More specifically, for example, the technique described in Japanese Patent No. 4229915 can be used. The scoring result corresponds to the pitch (frequency) and is synonymous with the measurement of frequency characteristics.

  By the way, as an acoustic signal for measuring the frequency characteristic of the karaoke singing space, an audio signal is used instead of the MIDI note data, and a reproducing means for reproducing the audio signal is provided, and the sound can be emitted after initial tuning. . The audio signal as an acoustic signal for measurement has a frequency of 130.8 Hz (in C3) in the range of the singing range of a general karaoke user, that is, the scale frequency included in the male voice and female voice sung in karaoke music. Equivalent) to 1046.5 Hz (corresponding to C6).

  For this scoring process, a conventional technique can be applied. For the frequency characteristic measurement acoustic signal as an audio signal collected from the microphone 15, the pitch of the frequency characteristic measurement acoustic signal and the frequency characteristic measurement acoustic signal for each predetermined scoring section A scoring process may be performed by detecting the volume and comparing it with each volume of the corresponding frequency characteristic measurement reference data.

  The music DB 51 stored in the storage unit 30 stores note data, lyrics data, and the like for each music. Regarding performance, specifically, there is a music table in which a music ID, a music title, and an artist ID (artist name) are associated, and for each music, note data of a karaoke music in a predetermined data format managed by the music ID (for example, , MIDI format musical note data), etc., each of which is a database storing the music ID as a file name.

  The music DB 51 also stores karaoke performance data for measurement (referred to as music A). The karaoke performance data for measurement (music A) is, for example, as shown in FIG. 2A, a singing range of a general karaoke user, that is, a scale included in the male voice and female voice sung by karaoke music. The musical performance data includes, for example, 37 pieces of note information for each semitone from C3 to C6 of the piano keyboard. At the time of reproduction, 37 musical tones having a pitch of 9.25 sec are played at the tempo of one note 120, and each note is played as an eighth note and at a constant volume. The timbre to be used is preferably a timbre close to a sine wave (having a small harmonic component) and not attenuated (slowly attenuated).

  The video DB 52 stored in the storage unit 30 is a database in which music IDs are stored as file names for background video data corresponding to each music.

  Reference DB53 memorize | stored in the said memory | storage part 30 in order to evaluate and analyze the song by the singer matched with the karaoke music memorize | stored in the said music DB51 and the sufficiently small song area (for example, 15 msec) of the said karaoke music. It is a database that stores the reference data used as the evaluation standard in association with each other. The reference data includes a pitch (pitch) to be sung according to at least a note number and velocity (size) for each music piece. In the MIDI device, the “do” in the center of the piano keyboard (88 keys) is “C4 (261.6 Hz)”, the highest note “do” is “C8 (4186 Hz)”, and the lowest note keyboard. “La” is expressed as “A0 (27.5 Hz)”.

  The reference DB 53 stores frequency characteristic measurement reference data associated with the music piece A. The frequency characteristic measurement reference data corresponds to the measurement karaoke performance data (music A) as shown in FIG. 2B, for example, and a reference pitch and a predetermined reference volume corresponding to each pitch change. Reference data having a (fixed value) reference volume (Lr). If the scoring section is 15 msec for the music piece A (9.25 second measuring karaoke performance data composed of 37 notes), the scoring process is about 617 sections.

  The mode switching means 31 is a program that causes the mixing amplifier 14 to generate a command for switching between a singing mode in which the user sings and a measurement mode for measuring the frequency characteristics of the karaoke singing space. Default state. The mode switching operation causes the karaoke main body 12 to output a measurement mode switching command from the remote input / output device 17 (for example, maintenance display).

  The frequency characteristic determining means 32 uses the frequency characteristics of the karaoke singing space measured by scoring by the scoring means 28 to each pitch (C3 to C6) of the scale according to the initial tuning (first tuning). Is a program for determining whether or not there is a dip frequency overlapping any of the above. That is, it is based on the idea that when the volume of the collected musical sound is lower than the reference volume (reference data) by a predetermined value or more, the pitch corresponds to the dip frequency.

  Specifically, based on the scoring result, it is determined whether or not there is a scoring section Sd with a small volume over a predetermined value α in the volume comparison, and if there is, a scoring section Sd with a small volume over the predetermined value α in the volume comparison. Is specified as the dip frequency Fd.

  When the dip frequency exists in the karaoke singing space as determined by the frequency characteristic determination unit 32, the reproduction control unit 33 differs from the initial tuning (first tuning) with respect to the music performance control unit 25 constituting the reproduction unit. Is a program for setting a specific tuning (second tuning) with a tuning amount of 50 cents or less. For example, when A4 is set to 440 Hz in the initial tuning, A4 is set to be reduced to a maximum of 427.48 Hz (or A4 is increased to a maximum of 452.89 Hz).

  In this case, the frequency characteristic determination means 32 continuously changes the pitch corresponding to the dip frequency and measures the dip width (for example, the volume difference from the pitch before and after the maximum dip pitch). The tuning change amount of the second tuning can be reduced.

  Therefore, FIG. 3 shows a flowchart regarding the specific tuning from the frequency characteristic measurement of FIG. 1, FIG. 4 shows an explanatory diagram of the frequency characteristic measurement of FIG. 3, and FIG. 5 shows an explanatory diagram of the relationship between pitch and frequency. First, the karaoke apparatus 11 starts up. The tuning at this time is initial tuning (A4 is tuned to 440 Hz). When the measurement mode for obtaining the frequency characteristic of the karaoke singing space is set and the music piece A of the karaoke performance data for measurement is reserved and registered using the remote input / output device 17, the mode switching means 31 measures the mixing amplifier 14. The mode is set, and the music A is reserved and registered in the reservation queue 41 of the RAM 23. The position of the microphone 15 is the singing position in the karaoke singing space. Thus, the frequency characteristic of the karaoke singing space can be reflected in the karaoke singing.

  In FIG. 3, the music performance control unit 25 reads the karaoke performance data for measurement (music A) as MIDI data shown in FIG. 2A from the music DB 51 of the storage unit 30 in response to the registration of the reservation waiting example 41. The sound is output from the speaker 16 by sending it to the mixing amplifier 14 as an acoustic signal for each sound according to the initial tuning to the sound source 26 (step 1 (S1)).

  By reproducing the measurement karaoke performance data (music A), the microphone 15 collects the measurement acoustic signal emitted from the speaker 16. The collected acoustic signal for measurement is input to the mixing amplifier 14, A / D converted, and sent to the scoring means 28 of the karaoke main body 12. In the mixing processing by the mixing amplifier 14, the measurement acoustic signal is mixed depending on the measurement mode. The level is controlled to zero. That is, the measurement acoustic signal passes through the mixing amplifier 14, is A / D converted, and is input to the scoring means 28 (S2).

  The scoring means 28 acquires the A / D-converted frequency characteristic measurement acoustic signal, reads out the frequency characteristic measurement reference data of the music piece A from the reference DB 53, and performs the frequency characteristic for each scoring section (for example, 15 msec). The pitch and volume of the measurement acoustic signal are detected and scored in comparison with the volume of each pitch of the corresponding frequency characteristic measurement reference data (S3). The scoring results are shown in FIG. 4, for example.

  The frequency characteristic determination means 32 acquires the scoring result from the scoring means 28, and based on the scoring result and the pitch (pitch) detection result, as shown in FIG. It is determined whether or not there is a scoring section Sd that is smaller than the reference value Lr by a predetermined value α or more (S4). If it does not exist, the process ends (S5), the specific tuning is not performed, and the singing song is reproduced with the initial tuning.

  When there is a scoring section Sd in which the volume of the frequency characteristic measurement acoustic signal is smaller than the frequency characteristic measurement reference data Lr by a predetermined value α (S5), the frequency of the pitch note Nd corresponding to the scoring section Sd Is identified as the dip frequency Fd (S6). Note that the relationship between each pitch and the frequency (Hz) is uniquely determined by the initial tuning (A4 = 440 Hz) of the tone generation means (synthesizer) as shown in FIG. As the value of α for specifying the dip frequency Fd, for example, a numerical value corresponding to a volume level difference of 12 dB may be set.

  Then, the reproduction control means 33 obtains the dip frequency (Fd) specified by the frequency characteristic determination means 32, and the reproduction control means is used by the music performance control section 25 for playing the music thereafter. On the other hand, it is set to lower (or increase) the tuning amount so that the difference from the initial tuning in the entire performance is 50 cents or less (S7). The frequency characteristics may be measured once for each karaoke singing space (karaoke room), but may be periodically measured again. Then, information indicating whether or not the dip frequency Fd has been specified by the frequency characteristic determination means 32 is stored in a predetermined area (not shown) of the storage unit 30, and thereafter, karaoke performance is performed according to tuning based on this information.

  That is, when the frequency characteristic of a karaoke room (karaoke singing space) is measured in the singing range of a general karaoke user, and there is a dip frequency Fd that overlaps any pitch of the scale included in the singing range, The tuning of the entire karaoke performance is shifted by 50 cents so that each pitch does not overlap with the dip frequency Fd. If the dip width is normal, the pitch to be sung will be dip by changing the tuning to 50 cents. It is possible to avoid overlapping with the frequency Fd, and it is possible to eliminate the impression that the microphone sucks poorly without requiring resources such as an equalizer. Note that by using the functions of the music performance control unit 25 and the scoring means 28 provided in the karaoke apparatus, only the necessary pitches in the required range are discretely added without adding hardware such as a test sound source or a measurement unit. The frequency characteristic can be measured.

  Next, FIG. 6 shows a partial block diagram of another embodiment of the karaoke apparatus according to the present invention, and FIG. 7 shows a flowchart of the music determination process of FIG. 6, in the karaoke apparatus 11 of FIG. 1, the storage unit 30 is provided with an area 54 for storing a dip frequency (Fd), and the bus 20 is provided with a music determination means 34.

  The dip frequency (Fd) specified by the frequency characteristic determination means 32 is stored in the dip frequency (Fd) storage area 54 of the storage unit 30, and the music determination means 34 uses this to specify the music to be specifically tuned. The music determination means 34 extracts all pitches to be sung from the karaoke performance data of the music registered in the reservation queue 41, and only includes a pitch that overlaps the dip frequency Fd of the karaoke singing space. This is a program for setting the specific tuning (second tuning) for the reproduction control means 33, and the frequency characteristic determination means 32 and the reproduction control means 33 are the same as described above.

  Therefore, in FIG. 7, every time a predetermined music is reserved and registered in the reservation queue 41, the music determination means 34 reads out the karaoke performance data of the music from the music DB 51 and extracts all pitches to be sung. Then, it is determined whether the frequency of each pitch included in the karaoke performance data includes the dip frequency Fd that has been specified and stored (S11). In order to extract the pitch to be sung included in the karaoke performance data, the singing guide melody data normally included in the karaoke performance data may be referred to. Alternatively, reference data corresponding to the karaoke performance data stored in the reference DB 53 can be read and the reference pitch can be referred to.

  When a pitch including the dip frequency Fd exists in the music (S12), a flag for specific tuning of the entire performance is attached to the music registered in the reservation queue 41 (S13). When the music pieces are played in order, the reproduction control means 33 sets a specific tuning with the above-described tuning amount for the music performance control unit 25.

  Further, when the specified dip frequency Fd is not included in each pitch of the music (S12), the flag is not attached, and the specific tuning is not performed when the music is played, and the initial tuning is performed. In this state, the music performance control unit 25 performs reproduction processing.

  That is, even if it is determined by the frequency characteristic determination means 32 that the dip frequency Fd is present, it is possible to specify useless specification by determining whether or not specific tuning (second tuning) is performed for each musical piece to be played. Tuning can be avoided. When key control, that is, transposition in semitone units of the entire music is set by the user, it is desirable to extract the pitch to be sung in consideration of the transposition amount.

  The karaoke apparatus of the present invention can be used in the industrial field of karaoke apparatuses having basic functions including a karaoke scoring function.

DESCRIPTION OF SYMBOLS 11 Karaoke apparatus 12 Karaoke main body 14 Mixing amplifier 15 Microphone 16 Speaker 25 Music performance control part 28 Scoring means 30 Memory | storage part 31 Mode switching means 32 Frequency characteristic judging means 33 Playback control means 34 Music judging means 41 Reservation queue 51 Music DB
53 Reference DB

Claims (3)

A karaoke device having a basic function of reproducing karaoke performance data and allowing a singer to sing,
Playback means for playing back karaoke performance data and generating karaoke performance data in the first tuning;
Karaoke user's singing pitch range measurement karaoke performance data is reproduced by the reproducing means according to the first tuning and frequency characteristic measuring means for measuring the frequency characteristic of the karaoke singing space;
Frequency characteristic determination means for determining whether or not there is a dip frequency that overlaps any one of the pitches of the scale according to the first tuning in the measured frequency characteristic of the karaoke singing space;
When the dip frequency is present in the karaoke singing space as determined by the frequency characteristic determining means, the reproduction is set to the second tuning of the tuning amount so that the difference from the first tuning is 50 cents or less. Control means;
A karaoke apparatus comprising: The karaoke apparatus according to claim 1,
The frequency characteristic measuring means reproduces and emits the karaoke performance data for measurement for sequentially generating musical tones of pitches according to the first tuning, and collects the emitted musical sounds. Compare the volume of the musical sound of each pitch with the reference volume to obtain the frequency characteristics of the karaoke singing space,
The karaoke apparatus characterized in that the frequency characteristic determining means determines a pitch of a musical sound having a volume smaller than a reference volume by a predetermined value or more as a dip frequency based on a frequency characteristic of the karaoke singing space. The karaoke apparatus according to claim 1 or 2,
It has a reservation queue for pre-registration and predetermined performance of predetermined songs,
Only when the pitch to be sung is extracted from the karaoke performance data of the music registered in the reservation queue and includes a pitch that overlaps with the dip frequency of the karaoke singing space, the playback control means includes the first 2. A karaoke apparatus comprising music determining means for setting two tunings.

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