WO2007116755A1 - 倍音生成装置、デジタル信号処理装置及び倍音生成方法 - Google Patents
倍音生成装置、デジタル信号処理装置及び倍音生成方法 Download PDFInfo
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- WO2007116755A1 WO2007116755A1 PCT/JP2007/056442 JP2007056442W WO2007116755A1 WO 2007116755 A1 WO2007116755 A1 WO 2007116755A1 JP 2007056442 W JP2007056442 W JP 2007056442W WO 2007116755 A1 WO2007116755 A1 WO 2007116755A1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
- G10H1/06—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour
- G10H1/16—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour by non-linear elements
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
- G10H2210/155—Musical effects
- G10H2210/311—Distortion, i.e. desired non-linear audio processing to change the tone color, e.g. by adding harmonics or deliberately distorting the amplitude of an audio waveform
Definitions
- Overtone generator digital signal processor, and overtone generation method
- the present invention relates to a harmonic overtone generating device, a digital signal processing device, and a harmonic overtone generating method.
- a conventional overtone generator uses a compressor having input / output characteristics as shown in FIG.
- the compressor outputs an output signal linearly when the input signal is less than or equal to a predetermined value A, and outputs an output signal with a predetermined value A when the input signal exceeds the predetermined value A. Therefore, when a sine wave music signal as shown in FIG. 2 (a) is input to the compressor, a music signal in which the portion exceeding the predetermined value A is distorted is output as shown in FIG. 2 (b).
- Fig. 3 shows the relationship between the frequency and signal level of the music signal shown in Fig. 2 (b).
- harmonic components 2f, 3f, 4f,... Of this frequency are generated at the frequency f of the original music signal.
- Patent Document 1 Japanese Patent Laid-Open No. 5-6177
- overtones are generated for all frequencies included in the music signal. For this reason, for example, it is not possible to generate harmonics only in the frequency band of the vocal region so that the vocal region can be heard particularly well.
- an object of the present invention is to provide, for example, a harmonic generation device, a digital signal processing device, and a harmonic generation method capable of generating a harmonic overtone reliably and easily even with a music signal of a small signal level. It is to provide.
- an object of the present invention is to provide, for example, a harmonic generation device, a digital signal processing device, and a harmonic generation method capable of obtaining a music signal that can be heard particularly well only in a predetermined frequency band.
- the invention according to claim 1 is a harmonic overtone generating device including harmonic overtone generating means for generating a harmonic overtone component in the music signal by suppressing a signal level exceeding a predetermined value of the music signal to the predetermined value.
- the first level for generating a harmonic component by the harmonic overtone generating means after performing level correction by multiplying the signal level of the music signal by a correction coefficient so that the signal level of the music signal exceeds the predetermined value.
- a harmonic overtone generator comprising: a correction unit; and a second level correction unit that performs level correction by multiplying the signal level of the music signal that has generated the harmonic component by (1Z the correction coefficient). .
- the invention of claim 5 is the harmonic overtone generating device provided with overtone generating means for generating overtone components for the music signal, and extracting only the predetermined frequency band from the music signal and extracting the predetermined frequency band First extraction means for supplying the music signal to the overtone generation means;
- a second extracting means for extracting only the harmonic component by removing the predetermined frequency band from the music signal in which the harmonic component is generated, and adding the harmonic component extracted by the second extracting means to the music signal.
- the present invention resides in a harmonic overtone generator characterized by comprising an adding means.
- the invention of claim 6 performs digital signal processing of a music signal! When a signal level larger than the maximum signal level that can be processed by the digital signal is generated, the signal level is suppressed to the maximum value.
- the signal level of the music signal is applied to the digital signal processing device.
- First level correction means for generating a harmonic component by level correction by multiplying the signal level of the music signal by a correction coefficient so that the level exceeds the maximum value, and the first level correction means corrected by the first level correction means
- a digital signal processing apparatus comprising: second level correction means for performing level correction by multiplying the signal level of the music signal by (1Z correction coefficient).
- the invention according to claim 9 is directed to a digital signal processing apparatus that performs digital processing of a music signal, and suppresses a signal level exceeding a predetermined value of the music signal to the predetermined value, thereby overtones the music signal.
- Overtone generating means for generating a component
- first extraction means for extracting only a predetermined frequency band from the music signal and supplying the extracted music signal in the predetermined frequency band to the overtone generating means, and generating the overtone component
- Second extraction means for extracting only overtone components by removing the predetermined frequency band from the music signal, and addition means for adding the overtone components extracted by the second extraction means to the music signal.
- the invention according to claim 10 is the harmonic overtone generating method for generating a harmonic overtone component in the music signal by multiplying the signal level of the music signal by a correction coefficient so that the signal level of the music signal exceeds a predetermined value. After performing the level correction, a signal level exceeding a predetermined value of the music signal is suppressed to the predetermined value to generate a harmonic component, and the signal level of the music signal that has generated the harmonic component (1Z the correction)
- the present invention resides in a harmonic generation method characterized by performing level correction by multiplying by a coefficient.
- the invention of claim 11 is a harmonic overtone generation method for generating overtone components in a music signal! Then, only a predetermined frequency band is extracted from the music signal, a harmonic component is generated with respect to the extracted music signal of the predetermined frequency band, and the predetermined frequency band is extracted from the music signal in which the harmonic component is generated.
- the present invention resides in a harmonic generation method characterized by removing only the harmonic component and extracting the harmonic component and adding the extracted harmonic component to the music signal.
- FIG. 1 is a graph showing input / output characteristics of a compressor conventionally used as a harmonic generator.
- FIG. 2 (a) shows a music signal input to the compressor having the input / output characteristics shown in FIG. (B) is a graph showing the music signal output from the compressor having the input / output characteristics shown in FIG.
- FIG. 3 is a graph showing the relationship between the frequency and signal level of the music signal shown in FIG. 2 (b). ⁇ 4] It is a block diagram showing an example of a basic configuration of a harmonic overtone generating device according to the present invention.
- FIG. 5 It is a configuration diagram showing an example of a basic configuration of a harmonic overtone generating device according to the present invention.
- FIG. 6 is a configuration diagram showing an example of a basic configuration of a digital signal processing device according to the present invention.
- FIG. 7 is a block diagram showing an example of a basic configuration of a digital signal processing device according to the present invention.
- FIG. 8 is a block diagram showing an embodiment of a reproduction apparatus incorporating a harmonic overtone generation apparatus and a digital signal processing apparatus according to the present invention.
- FIG. 9 is a block diagram showing a configuration of a DSP constituting the playback device shown in FIG.
- FIG. 10 (a) is the signal level of the music signal before the level correction by the first level correction unit 11a, and (b) is the level after the level correction by the first level correction unit 11 is performed. (C) and (d) are the signal levels of the music signal after the level correction by the second level correction unit 13.
- FIG. 11 (a) shows the frequency characteristic of the music signal before being input to the first filter unit 14, (b) shows the frequency characteristic of the music signal after passing through the first filter unit 14, c) shows the frequency characteristics of the music signal after the level correction by the first level correction section 11, (d) shows the frequency characteristics of the music signal after passing through the second filter section 15, and (e ) Shows the frequency characteristics of the music signal after passing through the adder 16.
- Second correction coefficient multiplier (second correction coefficient multiplier)
- Second level correction unit (second level correction means)
- Second filter section (second extraction means)
- FIGS. 4 and 5 are configuration diagrams showing an example of the basic configuration of the overtone generating device according to the present invention
- FIGS. 6 and 7 are configurations showing an example of the basic configuration of the digital signal processing device according to the present invention.
- the overtone generation device includes a overtone generation unit 103 that includes overtone generation means 103 that suppresses a signal level exceeding a predetermined value of the music signal to a predetermined value and generates a overtone component in the music signal.
- the harmonic signal generation means 103 can reliably Overtones can be generated while suppressing the level. In other words, even a small signal level music signal can reliably generate overtones.
- the overtone generating means 103 performs digital signal processing of the music signal V, and when the signal level is larger than the maximum signal level that can be processed by the digital signal, the signal is generated.
- the digital signal processing device that suppresses the level to the maximum value may be configured, and the predetermined value may be the maximum value.
- a digital signal processing device that performs digital signal processing of various music signals can be used as the harmonic overtone generation means 103. Since the digital signal processing apparatus overflows when the predetermined value is the above-mentioned maximum value, harmonics can be generated. Therefore, even if the digital signal processing apparatus does not perform arithmetic processing or the like according to a nonlinear function, Can generate harmonics with little arithmetic processing.
- the first level correcting means 11 is composed of a digital signal processing device.
- a first correction coefficient multiplication unit 11a that multiplies the signal level of the music signal by the first correction coefficient, and a signal level obtained by multiplying the first correction coefficient by a second correction coefficient that is determined in advance.
- Correction coefficient multiplication means l ib coefficient for correcting the first correction coefficient so that the difference between the signal level multiplied by the first correction coefficient and the value obtained by dividing the predetermined target value by the second correction coefficient is zero It may have correction means 1 lc.
- the coefficient correction unit 11c corrects the first correction coefficient so that the signal level becomes smaller than the target value (target value Z second correction coefficient). For this reason, even if the target value is set to a value close to the maximum value, the signal level does not exceed the maximum value when the signal level is multiplied by the first correction coefficient. lc can correct the first correction coefficient without being affected by the overflow of the digital signal processor.
- the harmonic overtone generating device includes a first extraction unit 14 that extracts only a predetermined frequency band of the music signal force and supplies the extracted music signal of the predetermined frequency band to the first level correction unit 11, and a harmonic overtone.
- Music signal force that generated the component
- the second extraction means 15 that extracts only the overtone component by removing the predetermined frequency band, and the addition that adds the harmonic component level-corrected by the second level correction means 13 to the music signal Means 16 may be provided. According to this, it is possible to obtain a music signal in which a predetermined frequency band among the frequency bands constituting the music signal can be heard particularly well.
- the overtone generating device includes a overtone generating device 103 that includes overtone generation means 103 that suppresses a signal level exceeding a predetermined value of the music signal to a predetermined value and generates a overtone component in the music signal.
- the first extraction means 14 for extracting only a predetermined frequency band and supplying the extracted music signal of the predetermined frequency band to the harmonic generation means 103, and removing the predetermined frequency band from the music signal in which the harmonic component is generated,
- a second extraction means 15 for extracting only the components and an addition means 16 for adding the harmonic component extracted by the second extraction means 15 to the music signal are provided. According to this, it is possible to obtain a music signal in which a predetermined frequency band among the frequency bands constituting the music signal can be heard particularly well.
- the digital signal processing apparatus performs digital signal processing of the music signal.
- the signal level is set to the maximum value.
- Digital signal processing devices that suppress The first level correction means 11 that generates a harmonic component by multiplying the signal level of the music signal by a correction coefficient so that the signal level exceeds the maximum value, and the music corrected by the first level correction means 11
- second level correction means 13 for performing level correction by multiplying the signal level of the signal by (1Z correction coefficient).
- the signal level exceeds the maximum value of the digital signal processing device by the level correction of the first level correction means 11, so that the digital signal processing is surely performed.
- Overflow can be generated by suppressing the signal level of the music signal when the device overflows. That is, even a small signal level music signal can reliably generate overtones.
- the harmonics can be generated by overflowing the digital signal processing device, the harmonics can be generated even if the digital signal processing device does not perform arithmetic processing according to a nonlinear function. Can generate overtones.
- the first level correction means 11 is a signal obtained by multiplying the first correction coefficient multiplication means 11a for multiplying the signal level of the music signal by the first correction coefficient, and the first correction coefficient.
- the second correction coefficient multiplying means l ib for multiplying the level by the second correction coefficient, and the difference SO between the signal level obtained by multiplying the first correction coefficient and the predetermined target value divided by the second correction coefficient
- it has the coefficient correction means 1 lc for correcting the first correction coefficient.
- the coefficient correction unit 11c corrects the first correction coefficient so that the signal level becomes smaller than the target value (target value Z second correction coefficient). For this reason, even if the target value is set to a value close to the maximum value, the signal level does not exceed the maximum value when the signal level is multiplied by the first correction coefficient. lc can correct the first correction coefficient without being affected by the overflow of the digital signal processor.
- the digital signal processing device extracts only the predetermined frequency band from the music signal and supplies the extracted music signal of the predetermined frequency band to the first level correcting means, and the harmonic overtone.
- a second extraction means 15 for extracting only overtone components by removing a predetermined frequency band from the music signal in which the components are generated, and an addition means for adding the overtone components level-corrected by the second level correction means to the music signal 16 And may be provided. According to this, it is possible to obtain a music signal in which a predetermined frequency band can be heard particularly well among the frequency bands constituting the music signal. Togashi.
- the digital signal processing device is a digital signal processing device that performs digital processing of a music signal, overtone generating means 103 for generating a harmonic overtone component for the music signal, and a music signal card.
- First extracting means 14 for extracting only the predetermined frequency band and supplying the extracted music signal of the predetermined frequency band to the harmonic generation means 103, and removing the predetermined frequency band from the music signal in which the harmonic component is generated.
- Second extraction means 15 for extracting only overtone components, and addition means 16 for adding the overtone components extracted by the second extraction means 15 to the music signal are provided. According to this, it is possible to obtain a music signal in which a predetermined frequency band can be heard particularly well among the frequency bands constituting the music signal.
- the overtone generation method is based on the overtone generation method for generating overtone components in a music signal, so that the music signal has a signal level exceeding a predetermined value. After performing signal level correction by multiplying the signal level by a correction factor, the signal level exceeding the specified value of the music signal is suppressed to a specified value to generate a harmonic component, and the signal of the music signal that has generated the harmonic component Multiply the level by (1Z correction factor) to correct the level.
- the overtone generation method is a harmonic overtone generation method for generating overtone components in a music signal, by extracting only a predetermined frequency band from the music signal and extracting the predetermined frequency band.
- a harmonic component is generated from the music signal in the frequency band
- the predetermined frequency band is removed from the music signal that generated the harmonic component, and only the harmonic component is extracted, and the extracted harmonic component is added to the music signal. According to this, it is possible to obtain a music signal in which a predetermined frequency band can be heard particularly well among the frequency bands constituting the music signal.
- FIG. 8 is a block diagram showing an example of the configuration of a music playback device incorporating a harmonic generation device and a digital signal processing device.
- This music playback apparatus processes a digital music signal recorded on a recording medium such as a DVD (Digital Versatile Disc), a CD (Compact Disc), or a hard disk (Hard Disk) into a signal that can be played back by a speaker. To do.
- the music playback apparatus 100 is connected to an output unit 200 that plays back the processed music information.
- the output unit 200 reproduces and outputs the music signal output from the music reproducing device 100.
- the output unit 200 includes a digital Z analog (DZA) conversion 210, an amplifier 220, and a speaker 230.
- the DZA converter 210 is connected to the music playback device 100 and converts a digital music signal output from the music playback device 100 into analog. Then, the D / A converter 210 outputs the music signal converted into analog to the amplifier 220.
- DZA digital Z analog
- the amplifier 220 is connected to the DZA converter 210 and to the speaker 230. This amplifier 220 amplifies the analog music signal output from the DZA converter 210 and outputs it from the speaker 230.
- the playback apparatus 100 includes a DIR (Digital Interface Receiver) 101 to which a digital music signal read from the storage medium described above is input, a decoder 102 that demodulates the compressed music signal, A DSP (Digital Signal Processor) 103 that performs various signal processing such as mixing processing and effect processing of the demodulated music signal, and a CPU 104 that controls the DSP 103 are also configured.
- DIR Digital Interface Receiver
- decoder Digital Signal Processor
- the signal level of digital music signal is the maximum of DSP103
- the signal level is an absolute value.
- the DSP 103 uses a program stored in a memory (not shown) so as to exceed the maximum value X of the signal level force SDS P103 and the first filter unit 14 as the first extraction means for extracting only the music signal force predetermined frequency band. Multiply the signal level of the music signal by the correction factor 2W
- 1st level correction unit 11 as 1 level correction unit
- 2nd level correction unit 13 as 2nd level correction unit to multiply the signal level of music signal by (1Z correction coefficient 2W)
- overtone component was generated
- the second to extract only overtone components by removing a predetermined frequency band from the music signal
- a second filter unit 15 serving as an extraction unit and an adder unit 16 that adds the harmonic component extracted by the second filter unit 15 to the original music signal are included.
- the first level correction unit 11 described above has a first correction coefficient multiplication unit 11a as a first correction coefficient multiplication unit that multiplies the signal level X of the music signal by the first correction coefficient W, and the signal level X.
- a second correction coefficient multiplication unit l ib as a second correction coefficient multiplication means that multiplies a value obtained by multiplying the first correction coefficient W (hereinafter, x'W) by 2 ( second correction coefficient), and x'W
- the target value V is It is set to a value that is higher than the maximum value.
- the coefficient correction unit 11c described above adds the (VZ2) force to the subtraction unit 11c-1 that subtracts the I x'W
- and the subtraction value e ( (V / 2)-I xW I).
- a correction unit 1 lc-2 that corrects the first correction coefficient W by adding a value a ′ e multiplied by the step size ⁇ to the first correction coefficient W is provided.
- W (n) is the first correction coefficient when the (n-1) -th correction is performed by the correction unit 1 lc 2, and the first correction is performed when the n-th correction is performed.
- W (n) tW (n-1) has the relationship shown in the following equation (1). Note that n is an arbitrary integer.
- the coefficient correction unit 11c makes the negative e smaller if it is greater than the I x'W I force (VZ2), and decreases the first correction coefficient W. If it is corrected and smaller than I x'W I force S (VZ2), it is corrected so that ae becomes positive and the first correction coefficient W becomes large. Also, if the difference between I x'W I and (VZ2) is large, the value of ae also increases, and the large ae is added to or subtracted from the first correction factor W, and I x'W
- the coefficient correction unit 11c corrects the first correction coefficient W so as to obtain a value I xW I force obtained by multiplying the signal level X by the first correction coefficient W.
- the first correction coefficient multiplication unit 11a performs level correction so that the signal level X of the music signal approaches VZ2, and the second correction coefficient multiplication unit l ib The level is corrected so that the signal level x of the music signal approaches V.
- FIG. 10 shows the signal level of the music signal before the level correction by the first level correction unit 11, and (b) shows the music signal level after the level correction by the first level correction unit 11.
- C) and (d) are signal levels of the music signal after level correction by the second level correction unit 13.
- the signal level is expressed as an absolute value for simplicity.
- the first level correction unit 11 corrects the signal level X by multiplying the signal level X by the correction coefficient 2W so that the signal level X of the music signal shown in FIG. 10 (a) approaches the target value V. .
- the signal level X is multiplied by a correction coefficient 2W such that the signal level of the music signal repeats overshoot and undershoot with respect to the target value V as shown by the dotted line in FIG.
- the target value V is set to a value larger than the maximum value X. Therefore, the second
- the 1 level correction unit 11 multiplies the signal level of the music signal by a correction coefficient 2W so that the portion exceeding the threshold value K (see FIGS. 10 (a) and 10 (b)) exceeds the maximum value X.
- the second level correction unit 13 multiplies the signal level of the music signal shown in FIG. 10B by (1Z correction coefficient 2W) before the signal level is corrected by the first level correction unit 11. Return to level. As a result, as shown in FIGS. 10 (c) and (d), a music signal in which the signal level equal to or higher than the threshold value K is distorted and a harmonic component is generated is obtained. As apparent from the above, the DSP 103 corresponds to a harmonic generation means.
- the threshold value K is a value determined by the relationship between the target value V and the maximum value X. In other words, target value V
- the threshold K decreases as the value increases, and the overflow rate of the DSP 103 increases.
- the target value V was set to be larger than the maximum value X.
- the value may be set to a value smaller than the maximum value X. That is The target value V is set so that the signal level of the music signal exceeds the maximum value x.
- FIG. Fig. 11 shows the frequency characteristics of the music signal before being input to the first filter section 14, (b) shows the frequency characteristics of the music signal after passing through the first filter section 14, and (c ) Shows the frequency characteristics of the music signal after the level correction by the first level correction unit 11a.
- a digital music signal whose force has been read is input to the decoder 102 via the DIR101.
- the decoder 102 demodulates the music signal compressed in a compression format such as MP3 or WMA, and supplies it to the DSP 103.
- Music signal power having frequency characteristics as shown in FIG. 11 (a) 3 ⁇ 4
- the first filter section 14 extracts only the predetermined frequency band from the music signal power.
- 11 Use a music signal consisting only of the specified frequency band as shown in (b).
- the predetermined frequency extracted by the first filter unit 14 can be selected and operated by the user from, for example, a plurality of frequency bands (such as a vocal region, a bass region, and a treble region), and the CPU 104 selects the frequency selected by the user.
- the DSP 103 is controlled to extract the belt.
- the first level correction unit 11 and the second level correction unit 13 generate overtone components as shown in FIG. 11 (c) in the music signal.
- the second filter unit 15 removes the predetermined frequency band and extracts only the overtone component.
- the adding unit 16 adds the original music signal and the harmonic component extracted by the second filter unit 15 as shown in FIG. 11 (e).
- the original frequency component can be supplemented with high-frequency overtone components shown by diagonal lines.
- the music signal with the overtone component added is then subjected to various signal processing and then output to the DZA conversion 210.
- the DZA conversion 210 converts the digital music signal to which the overtone component is added into analog, and then outputs the analog music signal to the speaker 230 via the amplifier 220. Then, the music signal to which the harmonic component is added is reproduced by the speaker 230.
- the signal level is the maximum value x by the level correction of the first level correction unit 11.
- DSP103 overflow can occur reliably, and the signal level of the music signal can be suppressed to generate overtones. That is, even a small signal level music signal can reliably generate overtones. According to this, even if the music signal has a small signal level, the signal level exceeds the maximum value of the DSP 103 by the level correction of the first level correction unit 11, so that the DSP 103 overflows and the signal level of the music signal is surely increased. Can suppress and generate overtones. That is, even a small-signal level music signal can surely generate overtones.
- the correction coefficient 2W by which the first level correction unit 11 multiplies the signal level is divided into two times by the first correction coefficient multiplication unit 11a and the second correction coefficient multiplication unit l ib. Multiply. Then, the coefficient correction unit 11c corrects the first correction coefficient W so that the value ⁇ ⁇ W obtained by multiplying the signal level X by the first correction coefficient W is smaller than the target value V and becomes (V / 2). Talk to you. For example, when the first correction coefficient W is corrected by the coefficient correction unit 11c so that x′V becomes the target value V, the signal level exceeds the maximum value X when the signal level is multiplied by the first correction coefficient W. Therefore, the coefficient correction unit 11c corrects so that the difference between the maximum value and the target value V becomes zero.
- the correction coefficient cannot be corrected so that the difference between x'V and the target value V becomes ⁇ .
- the target value V is set to a value close to the maximum value X.
- the coefficient correction unit 1 lc can correct the first correction coefficient W without being affected by the overflow of the DSP 103.
- the first filter unit 14 extracts only the predetermined frequency band of the music signal power. Then, after the harmonic component is generated in the extracted music signal of the predetermined frequency band, the second filter unit 15 removes the predetermined frequency band to extract only the harmonic component, and finally, the adding unit 16 Overtone components are added to the music signal. According to this, it is possible to obtain a music signal in which a predetermined frequency band can be heard particularly well among the frequency bands constituting the music signal. For example, so that the predetermined frequency band becomes the vocal area When set, the music signal resonates more with vocals, and when the predetermined frequency band is set to the low frequency range, the music signal resonates with low frequencies.
- the DSP 103 is overflowed to generate overtones, but the present invention is not limited to this.
- a program that performs a non-linear function operation equivalent to the input / output characteristics as shown in DSP103 may be incorporated to generate overtones.
- the first level correction unit 11 performs level correction by multiplying the signal level of the music signal by a correction coefficient so that the signal level of the music signal exceeds the predetermined value ⁇ ,
- Overtones can be generated by the non-linear operation of the DSP 103.
- the first level correction unit If the predetermined value A is set to a value smaller than the maximum value X, the first level correction unit
- 11 includes a correction coefficient multiplication unit that multiplies the signal level by the correction coefficient, and a coefficient correction unit that corrects the correction coefficient so that the value obtained by multiplying the signal level by the correction coefficient and the target value V become zero. A little.
- an analog compressor having input / output characteristics as shown in FIG. 1 may be used as the overtone generation means. Also in this case, the predetermined value A in FIG. 1 is set to a value smaller than the maximum value X.
- the first level correction unit 11 of the DSP 103 is caused to perform level correction by multiplying the signal level of the music signal by a correction coefficient so that the signal level of the music signal exceeds a predetermined value A.
- the music signal level-corrected by the first level correction unit 11 is DZA converted, converted to an analog music signal, and then supplied to the analog compressor to generate overtones. .
- the second correction coefficient multiplication unit l ib has multiplied 2 as the second correction coefficient, but the present invention is not limited to this.
- the second correction factor can be any value as long as the target value VZ second correction factor is smaller than the maximum value X above! /.
- the first correction coefficient multiplication unit 11a multiplies the signal level of the music signal by the first correction coefficient W to perform the second correction.
- the coefficient multiplication unit l ib multiplies the signal level multiplied by the first correction coefficient W by 2
- the coefficient correction unit 1 lc multiplies the signal level X multiplied by the first correction coefficient W and the predetermined target value V by 2.
- the first correction coefficient W is corrected so that the difference from the divided value becomes 0, but the present invention is not limited to this.
- the signal level of the music signal is multiplied by the correction coefficient so that the signal level of the threshold value K shown in FIG.
- the force in which the first and second level correction units 11 and 13 are configured by the DSP 103 is not limited to this. You may comprise.
- the error e itself is used as the first level correction means as the evaluation value for bringing the signal level X close to the target value (VZ2). It is not limited.
- the correction coefficient W may be corrected using the square error e 2 as an evaluation value so that the square error e 2 becomes zero. That is, the first level correction means may be any algorithm as long as it does not contradict the object of the present invention.
- the first and second level correction units 11 and 13 are provided, but the present invention is not limited to this.
- the present invention is not limited to this.
- the harmonic overtone generating device extracts a music signal power only in a predetermined frequency band, and supplies the extracted music signal in the predetermined frequency band to, for example, a peak hold circuit as a harmonic overtone generation unit;
- a second filter unit 15 that extracts only the harmonic component by removing a predetermined frequency band from the music signal in which the harmonic component is generated, and an addition unit that adds the harmonic component extracted by the second filter unit 15 to the music signal. If you have 16,
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US12/294,305 US7847176B2 (en) | 2006-03-30 | 2007-03-27 | Digital signal processor and a method for producing harmonic sound |
EP07739880A EP2012302A1 (en) | 2006-03-30 | 2007-03-27 | Harmonic producing device, digital signal processing device, and harmonic producing method |
JP2008509782A JP4787316B2 (ja) | 2006-03-30 | 2007-03-27 | デジタル信号処理装置及び倍音生成方法 |
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US (1) | US7847176B2 (ja) |
EP (1) | EP2012302A1 (ja) |
JP (1) | JP4787316B2 (ja) |
WO (1) | WO2007116755A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009116150A1 (ja) | 2008-03-19 | 2009-09-24 | パイオニア株式会社 | 倍音生成装置、音響装置及び倍音生成方法 |
JP2013019930A (ja) * | 2011-07-07 | 2013-01-31 | Rohm Co Ltd | 高域補完装置および音声信号処理システム |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013239973A (ja) | 2012-05-16 | 2013-11-28 | Yamaha Corp | 音声信号の倍音付加装置 |
WO2020101548A1 (en) * | 2018-11-16 | 2020-05-22 | Dirac Research Ab | Generating harmonics in an audio system |
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JPS62146313U (ja) * | 1986-03-06 | 1987-09-16 | ||
JPH04355795A (ja) * | 1991-06-03 | 1992-12-09 | Casio Comput Co Ltd | ディストーション回路 |
JPH056177A (ja) | 1991-06-28 | 1993-01-14 | Pioneer Electron Corp | 倍音発生器 |
JPH11509712A (ja) * | 1996-05-08 | 1999-08-24 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | 信号を処理する回路、オーディオシステム及び方法、及び高調波発生器 |
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JPS5939327B2 (ja) * | 1977-06-10 | 1984-09-22 | トヨタ自動車株式会社 | 車輌の懸架装置における着氷防止プロテクタ |
JPS62146313A (ja) * | 1985-12-19 | 1987-06-30 | Penta Ocean Constr Co Ltd | 水中設置物基部の洗掘防止工法 |
KR20000069914A (ko) * | 1997-11-07 | 2000-11-25 | 요트.게.아. 롤페즈 | 오디오 신호 처리 회로를 구비하는 오디오 시스템 |
WO2000014998A1 (en) * | 1998-09-08 | 2000-03-16 | Koninklijke Philips Electronics N.V. | Means for bass enhancement in an audio system |
US8023673B2 (en) * | 2004-09-28 | 2011-09-20 | Hearworks Pty. Limited | Pitch perception in an auditory prosthesis |
WO2005112508A1 (ja) * | 2004-05-13 | 2005-11-24 | Pioneer Corporation | 音響システム |
-
2007
- 2007-03-27 US US12/294,305 patent/US7847176B2/en not_active Expired - Fee Related
- 2007-03-27 JP JP2008509782A patent/JP4787316B2/ja not_active Expired - Fee Related
- 2007-03-27 EP EP07739880A patent/EP2012302A1/en not_active Withdrawn
- 2007-03-27 WO PCT/JP2007/056442 patent/WO2007116755A1/ja active Search and Examination
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JPS543724B2 (ja) * | 1973-12-29 | 1979-02-26 | ||
JPS62146313U (ja) * | 1986-03-06 | 1987-09-16 | ||
JPH04355795A (ja) * | 1991-06-03 | 1992-12-09 | Casio Comput Co Ltd | ディストーション回路 |
JPH056177A (ja) | 1991-06-28 | 1993-01-14 | Pioneer Electron Corp | 倍音発生器 |
JPH11509712A (ja) * | 1996-05-08 | 1999-08-24 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | 信号を処理する回路、オーディオシステム及び方法、及び高調波発生器 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009116150A1 (ja) | 2008-03-19 | 2009-09-24 | パイオニア株式会社 | 倍音生成装置、音響装置及び倍音生成方法 |
JP2013019930A (ja) * | 2011-07-07 | 2013-01-31 | Rohm Co Ltd | 高域補完装置および音声信号処理システム |
Also Published As
Publication number | Publication date |
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US20090165635A1 (en) | 2009-07-02 |
JPWO2007116755A1 (ja) | 2009-08-20 |
JP4787316B2 (ja) | 2011-10-05 |
EP2012302A1 (en) | 2009-01-07 |
US7847176B2 (en) | 2010-12-07 |
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