JPH03226786A - Pitch display device - Google Patents

Abstract

PURPOSE:To compare the pitches of plural signals by respectively converting plural extracted pitches to display data such as octave information or sound level and displaying plural display data in synchronism with one of the plural display data. CONSTITUTION:The basic cycles of acoustic signals 1 and 2 such as plural voices or musical sounds are extracted as the pitch by 1st and 2nd pitch extraction parts 11 and 12. Next, the extracted pitches are converted into the display data such as the octave information and sound level information by a data conversion part 20. Then, one of the plural display data is taken as a reference, and the display data are displayed according to a control signal for displaying the plural display data on a screen in timing synchronous with the display data which is the reference. Thus, the pitches of the plural acoustic signals are compared.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pitch display device that extracts the pitch of audio signals such as various musical tones and voices and displays the extracted pitch on a screen.

BACKGROUND OF THE INVENTION In recent years, with the advancement of digital technology, various pitch extraction techniques have been proposed, and pitch display devices for visually confirming the extracted pitches have also been considered.

As a conventional technique, for example, Japanese Patent Publication No. 59-13032
There is a pitch display device as shown in the above publication.

Hereinafter, the pitch display device will be explained in detail with reference to the drawings. In the figure, first, an acoustic signal such as a voice input from a microphone 1 is input to a filter circuit 100 . The filter circuit 100 is a voltage controlled filter (V
CF), and the fundamental wave component, ie, the pitch, of the input signal is always extracted at a constant level.

Next, the conversion circuit 300 converts the pitches sequentially extracted by the frequency detection circuit 200 into an information signal indicating which octave of the absolute scale is included, and which pitch within that octave, and sends the signal to the storage circuit 400. Output. The memory circuit 400 to which the information signal is input once writes the information signal into the random memory sequentially, and then the video signal forming circuit 500 writes the information signal to the memory circuit 4 at arbitrarily set time intervals.
The information signal read from 00 and information regarding the pitch table such as pitch names and scale name letters are sent to the monitor receiver 2.

As described above, by indicating the pitch of the acoustic signal input from the microphone 1, that is, the pitch information, by the length of a bar graph, etc., it is possible to visually check the pitch deviation.

Problems to be Solved by the Invention However, with the above configuration, although it is possible to check the pitch deviation from the pitch according to the preset pitch table, it is not possible to compare multiple input acoustic signals.

Furthermore, according to the conventional configuration, although it is possible to check pitch deviations for each note, it is not possible to compare consecutive pitches due to individual differences such as singing voices, the influence of pitch fluctuations due to phonemes, and time lags. It was very difficult to see and was not practical.

The present invention solves the above problems, and an object of the present invention is to provide a pitch display device that can compare the pitches of a plurality of acoustic signals.

Means for Solving the Problems In order to achieve the above object, the present invention provides a pitch extraction section that extracts the fundamental period of an acoustic signal such as a plurality of voices or musical tones as a pitch, and a a data conversion unit that converts the information into display data such as octave information and pitch information; The apparatus includes a display control section that performs control for displaying on a screen, and a display section that displays the display data according to a control signal from the display control section.

A second invention also provides a pitch extraction unit that extracts the basic period of an acoustic signal such as a plurality of voices or musical tones as a pitch, and data that converts the extracted pitch into display data such as octave information and pitch information. a converting unit; a display control unit that performs control to display the difference data after sequentially determining the difference between the plurality of display data as difference data; and a display control unit that performs control to display the difference data; It is equipped with a display section for displaying information.

Further, a third invention provides a pitch extraction unit that extracts the basic period of an acoustic signal such as a plurality of voices or musical tones as a pitch, and data that converts the extracted pitch into display data such as octave information and pitch information. a converting unit, and controls to display the plurality of display data on the screen at a timing synchronized with the reference display data using one of the plurality of display data as a reference, and arbitrarily set. a display control section that switches the display position of the plurality of display data so that a predetermined number of measures is completed within a predetermined display range according to information regarding display speed or tempo; and a control signal from the display control section. Therefore, it is equipped with a display section that displays the display data.

A fourth invention also provides a pitch extraction unit that extracts the basic period of an acoustic signal such as a plurality of voices or musical tones as a pitch, and data that converts the extracted pitch into display data such as octave information and pitch information. a conversion unit; and a display control unit that performs control to display video information such as lyrics in a predetermined display range at a timing synchronized with the plurality of display data and in a timing synchronized with the plurality of display data. , and a display section that displays the display data according to a control signal from the display control section.

action The present invention achieves the following effects with the above-described configuration.

In the first invention, pitches extracted from a plurality of voices or acoustic signals such as musical tones are each converted into display data such as octave information and pitch information, and the pitches are converted using one of the plurality of display data as a reference. To display a plurality of display data on a screen at a timing synchronized with reference display data.

In the second invention, pitches extracted from a plurality of voices or acoustic signals such as musical tones are each converted into display data such as octave information and pitch information, and the difference between these plurality of display data is determined as difference data. , display the difference data on the screen.

In the third invention, each pitch extracted from a plurality of voices or acoustic signals such as musical tones is converted into display data such as octave information and pitch information, and according to information regarding an arbitrarily set display speed or tempo. Synchronizes with one of the multiple display data as a reference while switching the display position of multiple display data so that a predetermined number of measures is completed within a predetermined display range of the screen. Display multiple pieces of display data on the screen at the same timing.

In the fourth invention, pitches extracted from a plurality of voices or acoustic signals such as musical tones are each converted into display data such as octave information and pitch information, and the pitches are converted using one of the plurality of display data as a reference. A video signal such as lyrics and a plurality of display data are displayed on a screen at a timing synchronized with reference display data.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a pitch display device according to an embodiment of the present invention.

In FIG. 1, a pitch extractor 10 extracts the pitches of a plurality of audio signals such as voices or musical tones, and a data converter 20 converts the plurality of extracted pitches into octave information and
and into display data such as pitch information, and the display control unit 30 uses one of the plurality of display data as a reference and displays the plurality of display data on the screen at a timing synchronized with the reference display data. In addition to outputting a control signal, it also calculates the difference between the reference display data and other display data as difference data, and outputs a control signal to display the difference data on the screen at a timing synchronized with the reference display data. However, the display section 40 displays a plurality of display data and difference data according to a control signal from a display control section.

The operation of the pitch display device configured as described above will be described below. To avoid confusion, we will explain the case where there are two acoustic inputs. First, two acoustic signals 1 and 2 input from a microphone etc. are input to the pitch extracting section 11 of the first pitch extracting section 10. ,
and the second pitch extractor 12, where the fundamental period, or so-called pitch, of the input acoustic signal is extracted. Note that as pitch extraction methods, an autocorrelation method, a zero crossing detection method, a peak detection method, etc. have already been proposed, and since any of these methods is not directly related to the present invention, the details will be omitted.

Next, the pitches extracted by the pitch extraction section 10 are outputted to the data conversion section 20.
Based on the input pitch, the first data converter 21 and the second data converter 22 respectively calculate an address corresponding to the pitch, and refer to the table using the address to obtain octave information and pitch name information. The octave information and pitch name information are sequentially output to the display control unit 30 as display data 1 and display data 2, respectively.

Here, the display control section 30 has a configuration as shown in FIG.
, and are sequentially input to the storage unit 35, and the storage unit 35 temporarily stores the input display data 1 and 2, and
The difference extraction unit 34 calculates the difference between the input display data 1 and 2, and then outputs the result as difference data to the storage unit 35, where it is temporarily stored.

On the other hand, the speed control section 32 according to the tempo instructed by the speed instruction section 31 or information regarding the display speed.
sequentially outputs the output timing of display data to be displayed on the screen to the control unit 37.

Here, when the speed instruction unit 31 instructs, for example, tempo = 120 and time signature = 4/4, the speed control unit 32 selects a predetermined measure to display the conversion segment on the time axis within the display range of the screen. The timing at which the number becomes 8, for example, is output to the control unit 37. To explain in more detail, since the number of measures is 8, the total number of beats is 4 x 8 = 32, and the tempo = 120 is an interval of 2 beats per second, so in order to display 8 measures, it is necessary to move from one end of the display range to the other. up to 1
It should be displayed in 6 seconds.

In addition, the display information instruction unit 33 provides the color or line type corresponding to each of display data 1 and 2, or information regarding the color and line type, and the standard color or line type of the difference data.
Alternatively, information regarding the color and line type is output to the control unit 37, respectively.

The control unit 37 sequentially reads display data 1 and 2 and the difference data from the storage unit 35 at a predetermined constant cycle, and sequentially reads the difference data as a value of the 1200th root of 2, that is, a value in cents. After converting the read display data 1 and 2 and the converted difference data to a coordinate position device on the time axis within the display range according to the output timing sequentially output from the speed control unit 32, for example, the horizontal While moving from the left end to the right end on the axis, the new display data is displayed after once erasing the display data of the coordinates indicating the pitch on the time axis and the difference data of the coordinates indicating the difference. , and display the difference data sequentially.

Furthermore, each time the right end display range is exceeded, the coordinates are reset to the left end and the erasure and display operations are repeated again.

On the other hand, to explain the control method on the coordinate position corresponding to the pitch, for example on the vertical axis, for example, if display data 1 exceeds the coordinate position corresponding to the pitch within the predetermined display range to the side where the pitch becomes higher. In other words, if the octave exceeds the display range, the control unit 37 converts the display data 1 by subtracting the octave by 1 from the display data 1.
For example, the coordinate position of display data 2 is shifted to the octave closest to the coordinate position of display data 1 using display data 1 as a reference, and then the data after shifting the coordinate position of display data 2 to the closest octave to the coordinate position of display data 1 is obtained as display data 2. Data 2 is output to the display section as a control signal.

In addition, only when the difference data exceeds a predetermined display range, the control unit 37 changes the color according to the special color set in advance by the display information instruction unit 33, or the color according to the special time line type information, or Display difference data using line types.

As a result of the above, on the screen displayed on the display unit 40, for example, as shown in FIG. is the coordinate corresponding to the measure, that is, time, and indicates that time passes as you move to the right. In addition, in order to make the boundary between the already displayed data and new data more clear, the control unit 37 places a vertically long cursor at the boundary.
This cursor portion moves according to the movement of the coordinates corresponding to the time axis output from the control unit 37.

Here, once video information such as lyrics is stored in the storage section 35 from the video information input section 36, the control section 37
After stopping the reading of the difference data from 5 and sequentially reading out the stored video information, a control signal is sent to display the video information within the display range of the difference data according to the timing output from the speed control section 32. Output begins, and this operation is repeated until the input of video information is completed.

In this embodiment, the tempo is input from the speed instruction section, but the display speed may also be input.
In this case, by controlling the number of bars displayed in accordance with the display speed, it is possible to confirm fine pitch movements or rough pitch movements between phrases of the song.

Furthermore, in this embodiment, the video information is displayed by switching it with the difference data, but for example, when video information is input, the entire display range or the display range of the difference data is reduced and the video information is displayed on the blank screen. I don't mind.

Furthermore, although this embodiment uses a plurality of pitch extraction units and data conversion units, it goes without saying that each unit may be used for time-sharing processing. Although the above display method has been described, it is also possible to display the display data, difference data, and video data on separate screens.

Furthermore, in this embodiment, the display data and the difference data are displayed on the corresponding coordinate points, but each coordinate point may be connected with a line. Another possible method is to set the pitch to O cents and connect a line from 0 to the coordinate point corresponding to the difference data.

In addition, in this embodiment, a plurality of display data input sequentially,
The difference data is once stored in the storage section and then read out sequentially in synchronization with the timing from the speed control section. It is also possible to generate a timing different from the timing from the control section, or to provide a separate timing generation section and sequentially display the stored data in synchronization with the timing.

As described above, according to this embodiment, a plurality of sequentially input pitches and pitch differences are temporarily stored in the storage section, and the control section is configured to control a speed corresponding to the speed instructed by the speed instruction section. Since the stored data is read from the storage section at the same timing, it is possible to simultaneously output multiple display data, differential data, or control signals such as video information to the display section at the same timing. can.

Effects of the Invention As is clear from the above description of the embodiments, in the first invention, each of the extracted plural pitches is converted into display data such as octave information or pitch, and these plural display data are converted into display data such as octave information or pitch. Since a plurality of pieces of display data are displayed in synchronization with one of the pieces of data, it is possible to compare the manner in which a plurality of pitches fluctuate or the so-called habits of singers.

In the second invention, each of the extracted bits is converted into display data such as octave information or pitch, the difference between these plurality of display data is determined as difference data, and then the difference data is is displayed, so you can check how the multiple pitches are shifted.

In the third invention, each of the plurality of extracted pitches is converted into display data such as octave information or pitch, and the plurality of display data is displayed in synchronization with one of the plurality of display data. In addition, the display speed of multiple pieces of display data displayed on one screen is controlled according to the specified tempo, so it is possible to change the way multiple pitches change for each measure or phrase of a song. Alternatively, it is possible to compare the so-called habits of singers.

In the fourth invention, each of the plurality of extracted pitches is converted into display data such as octave information or pitch, and the plurality of display data is displayed in synchronization with one of the plurality of display data. In addition, video information such as lyrics is output in synchronization with multiple display data at a display position other than the coordinates where the display data is displayed, so when comparing pitches such as singing voices, it is possible to refer to the screen. How to sing and fluctuate multiple pitches,
Alternatively, it is possible to compare the so-called habits of singers.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a pitch display device according to an embodiment of the present invention, FIG. 2 is a block diagram of a display control section according to an embodiment of the present invention, and FIG. 3 is a block diagram of a display section according to an embodiment of the present invention. The plan view, FIG. 4, is a block diagram of a conventional pitch display device. DESCRIPTION OF SYMBOLS 10... Pitch extraction part, 20... Data conversion part, 30... Display control part, 40... Display part.

Claims (10)

[Claims] (1) A pitch extraction unit that extracts the fundamental period of an acoustic signal such as a plurality of voices or musical tones as a pitch, and a data conversion unit that converts the extracted pitch into a plurality of display data such as octave information and pitch information. , a display control section that performs control to display the plurality of display data on a screen at a timing synchronized with the reference display data, using one of the plurality of display data as a reference; and the display control section. and a display section that displays the display data according to a control signal from the pitch display device. (2) a pitch extraction unit that extracts the basic period of an acoustic signal such as a plurality of voices or musical tones as a pitch; and a data conversion unit that converts the extracted pitch into a plurality of display data such as octave information and pitch information. , a display control unit that performs control to display the difference data after sequentially determining differences between the plurality of display data as difference data; and a display that displays the display data in accordance with a control signal from the display control unit. A pitch display device consisting of a section. (3) a pitch extraction unit that extracts the fundamental period of an acoustic signal such as a plurality of voices or musical tones as a pitch; and a data conversion unit that converts the extracted pitch into a plurality of display data such as octave information and pitch information. , Control is performed to display the plurality of display data on the screen at a timing synchronized with the reference display data using one of the plurality of display data as a reference, and at an arbitrarily set display speed or a display control section that switches the display position of the plurality of display data so that a predetermined number of measures is completed within a predetermined display range according to information regarding tempo; A pitch display device consisting of a display section that displays data. (4) a pitch extraction unit that extracts the fundamental period of an acoustic signal such as a plurality of voices or musical tones as a pitch; and a data conversion unit that converts the extracted pitch into a plurality of display data such as octave information and pitch information. , a display control unit that performs control to display video information such as lyrics in a predetermined display range at a timing synchronized with the plurality of display data and at a timing synchronized with the plurality of display data; A pitch display device comprising a display section that displays the display data according to a control signal from a control section. (5) Using one of the plurality of display data as a reference, the display control unit selects other display data within an octave in which the distance on the frequency axis between the reference display data and the other display data is the closest. 5. The pitch display device according to claim 1, wherein the pitch display device performs display control. (6) The display control section is characterized in that each time a predetermined display range of the plurality of display data is exceeded, the display control section shifts the octave information by one octave corresponding to the exceeded side. , 3, 4 or 5. The pitch display device according to . (7) Claims 1, 3, and 4, wherein the display control unit includes a color or line type for displaying a plurality of display data, or a display information instruction unit that arbitrarily sets the color and line type.
, 5 or 6. The pitch display device according to . (8) The pitch display device according to claim 2, wherein the display control section changes the displayed color or line type, or the color and line type when the difference data exceeds a predetermined display range. (9) Claims 1, 2, and 3, wherein the display control unit performs control to simultaneously and synchronously display a plurality of display data and difference data of the plurality of display data.
, 5, 6, 7 or 8. The pitch display device according to . (10) Claims 1, 2, 3, and 5, wherein the display control unit includes a plurality of display data and difference data of the plurality of display data, or a storage unit that stores display data or difference data. The pitch display device according to item 6, 7, 8 or 9.