WO2002025628A1 - Système de synthèse par harmoniques et formants - Google Patents

Système de synthèse par harmoniques et formants Download PDF

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Publication number
WO2002025628A1
WO2002025628A1 PCT/ES2000/000359 ES0000359W WO0225628A1 WO 2002025628 A1 WO2002025628 A1 WO 2002025628A1 ES 0000359 W ES0000359 W ES 0000359W WO 0225628 A1 WO0225628 A1 WO 0225628A1
Authority
WO
WIPO (PCT)
Prior art keywords
synthesis
wave
harmonics
transfer function
waves
Prior art date
Application number
PCT/ES2000/000359
Other languages
English (en)
Spanish (es)
Inventor
Juan SALES LÓPEZ DEL RIVERO
Pedro Vilaroig Aroca
Original Assignee
Onda Edit S.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Onda Edit S.L. filed Critical Onda Edit S.L.
Priority to AU2000275257A priority Critical patent/AU2000275257A1/en
Priority to PCT/ES2000/000359 priority patent/WO2002025628A1/fr
Publication of WO2002025628A1 publication Critical patent/WO2002025628A1/fr

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Classifications

    • 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
    • G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
    • G10H7/08—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform
    • G10H7/10—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform using coefficients or parameters stored in a memory, e.g. Fourier coefficients
    • 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
    • G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
    • G10H2250/471—General musical sound synthesis principles, i.e. sound category-independent synthesis methods
    • G10H2250/481—Formant synthesis, i.e. simulating the human speech production mechanism by exciting formant resonators, e.g. mimicking vocal tract filtering as in LPC synthesis vocoders, wherein musical instruments may be used as excitation signal to the time-varying filter estimated from a singer's speech

Definitions

  • the present invention a harmonic and formant synthesis system, consists of an original and innovative electronic circuit design configured for the generation of waves or electrical signals of any type and shape, within working ranges.
  • the most primitive way to generate waves is mechanically by generating a patter that generates acoustic waves.
  • the waves thus generated can in turn be modulated and distorted by filters and other circuits, which allow the desired wave design to be achieved at any time.
  • the present system of synthesis by harmonics and formants constitutes an electronic circuit that using microprocessors is capable of generating electric waves at will, allowing to generate from pure waves to the more complex, by harnessing the capabilities of the microprocessor circuit.
  • the function ⁇ (t) is assumed to be a periodic function and is reconstructed from sines of increasing frequencies that are integer multiples of the fundamental frequency Ü_O, since this is multiplied by n.
  • COQ has been defined as the frequency of the fundamental harmonic and not zero, since it would then be zero.
  • Equation (1) indicates that it is capable of being broken down into a Fourier series of constant coefficients A n over time. If we now assume that ⁇ (t) is a natural sound wave, that is, quasi-periodic, we have that the A n will suffer more or less important alterations.
  • envelope the function that defines A n over time. We will call this function as ⁇ (t) and in this case, equation (1) is transformed as:
  • ⁇ (f) Y 0 (t) + ⁇ J Y n (t) sin (n - ⁇ 0 t + ⁇ n )
  • ⁇ n (c) Each function associated with the frequency peak ⁇ n will be called ⁇ n (c) and represents the bandwidth centered on that frequency.
  • This spectrum can be represented by the sum of all its bands, that is:
  • the system allows the generation of waves of all kinds, including human voice, as a result of applying two groups of envelopes (one amplitude and one phase) independently to all harmonics, the resulting wave being stored in the computer by an identifiable file
  • it is carried out by means of an electronic circuit equipped with a microprocessor and constituted by an oscillator generating an input signal to the circuit, a set of spectral cells, each of them generating the signal corresponding to each of the frequency bands in That is divided.
  • the said spectral cells are formed by band amplifiers, which select the input signal by a multiple bandpass in a certain frequency range, in which it is amplified and modulated on the signal of a configurable transfer function from an Analog converter / Digital, being subsequently grouped the different signals from the respective spectral cells in a sum node where it is amplified giving rise to the output signal constituted by a wave configured by a transfer function appropriate to the type of wave to be generated.
  • the mentioned transfer function of the converter allows to generate waves that are not isotimbral allowing to generate waves and sounds endowed with high capacity of likelihood and reality, so that the relationship between the heights of the harmonics in a wave is not always the same , whatever the fundamental frequency that is emitted, particular characteristic of each voice, the transfer function being determined according to said characteristic.
  • said converter transfer function is generated by the microprocessor circuit of the device itself
  • Figure 1 View of the electronic scheme of the configuration of the synthesis system by harmonics and formants in real time.
  • the system allows the generation of waves of all kinds, including human voice, as a result of applying two groups of envelopes (one amplitude and one phase) independently to all harmonics, the resulting wave being stored in the computer by an identifiable file
  • the improvements in the harmonic and formant synthesis system are constituted by the creation of an electronic circuit equipped with a microprocessor and constituted by an oscillator (1), generator of an audio signal (2) input to the circuit, a set of spectral cells (4), each of them generating the signal corresponding to each of the frequency bands in which this is divided.
  • the said spectral cells (4) are formed by band amplifiers, which select through a multiple bandpass filter (3) the input signal in a certain frequency range, in which it is amplified and modulated on the signal of a function of configurable transfer ( ⁇ ) of an Analog / Digital converter (7), the different signals from the respective spectral cells (4) being subsequently grouped into a sum node (5) where it is amplified giving rise to the output signal (6 ) consisting of a wave configured by a transfer function (8) appropriate to the type of wave to be generated.
  • the aforementioned transfer function (8) of the converter (7) allows to generate waves that are not isotimbral allowing to generate waves and sounds endowed with high capacity of likelihood and reality, so that the relationship between the heights of the harmonics in a Wave is not always the same, whatever the fundamental frequency that is emitted, the particular characteristic of each voice, the transfer function ( ⁇ ) being determined as a function of said characteristic.
  • said transfer function (8) of the converter (7) is generated by the microprocessor circuit of the device itself
  • shape, materials and dimensions may be variable and in general, everything that is accessory and secondary, provided that it does not alter, changes or modifies the essentiality of the improvements that have been described.

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  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

L'invention concerne un système de synthèse par harmoniques et formants qui résout la synthèse et la génération d'ondes qui ne présentent pas le même timbre, tant en temps réel qu'en temps de calcul, le temps de calcul étant réalisé au moyen d'un algorithme de synthèse par interpréteur de commandes sélectif, permettant d'appliquer de manière indépendante à toutes les harmoniques deux groupes d'interpréteurs de commandes (d'amplitude et de phase), n'importe quel type d'onde obtenu qui est stocké dans l'ordinateur au moyen d'un fichier identifiable, tandis qu'en temps réel, l'onde est synthétisée au moyen d'un circuit constitué par un oscillateur (1), un générateur de signal audio (2), des cellules spectrales (4), un filtre multiple passe-bande (3), un noeud de sommation (5) et un convertisseur analogique/numérique (7), ce qui permet de produire un signal de sortie (6) qui peut être n'importe quel type d'onde.
PCT/ES2000/000359 2000-09-25 2000-09-25 Système de synthèse par harmoniques et formants WO2002025628A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2000275257A AU2000275257A1 (en) 2000-09-25 2000-09-25 Harmonics and formants synthesis system
PCT/ES2000/000359 WO2002025628A1 (fr) 2000-09-25 2000-09-25 Système de synthèse par harmoniques et formants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2000/000359 WO2002025628A1 (fr) 2000-09-25 2000-09-25 Système de synthèse par harmoniques et formants

Publications (1)

Publication Number Publication Date
WO2002025628A1 true WO2002025628A1 (fr) 2002-03-28

Family

ID=8244269

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2000/000359 WO2002025628A1 (fr) 2000-09-25 2000-09-25 Système de synthèse par harmoniques et formants

Country Status (2)

Country Link
AU (1) AU2000275257A1 (fr)
WO (1) WO2002025628A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012143244A1 (fr) 2011-04-19 2012-10-26 Renault Sas Generation d'un son de machine tournante d'un appareil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505712A (en) * 1974-03-26 1978-03-30 Univ Leland Stanford Junior Method of synthesizing a musical sound
US4422362A (en) * 1980-09-19 1983-12-27 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument of a formant synthesis type
US5401897A (en) * 1991-07-26 1995-03-28 France Telecom Sound synthesis process
US5665931A (en) * 1993-09-27 1997-09-09 Kawai Musical Inst. Mfg. Co., Ltd. Apparatus for and method of generating musical tones

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505712A (en) * 1974-03-26 1978-03-30 Univ Leland Stanford Junior Method of synthesizing a musical sound
US4422362A (en) * 1980-09-19 1983-12-27 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument of a formant synthesis type
US5401897A (en) * 1991-07-26 1995-03-28 France Telecom Sound synthesis process
US5665931A (en) * 1993-09-27 1997-09-09 Kawai Musical Inst. Mfg. Co., Ltd. Apparatus for and method of generating musical tones

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012143244A1 (fr) 2011-04-19 2012-10-26 Renault Sas Generation d'un son de machine tournante d'un appareil
FR2974441A1 (fr) * 2011-04-19 2012-10-26 Renault Sa Generation d'un son de machine tournante d'un appareil
US9542925B2 (en) 2011-04-19 2017-01-10 Renault Sas Generating sound for a rotating machine of a device

Also Published As

Publication number Publication date
AU2000275257A1 (en) 2002-04-02

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