EP4081769A1 - Procédé et système d'estimation d'une grandeur représentative de l'énergie sonore - Google Patents
Procédé et système d'estimation d'une grandeur représentative de l'énergie sonoreInfo
- Publication number
- EP4081769A1 EP4081769A1 EP20830216.6A EP20830216A EP4081769A1 EP 4081769 A1 EP4081769 A1 EP 4081769A1 EP 20830216 A EP20830216 A EP 20830216A EP 4081769 A1 EP4081769 A1 EP 4081769A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- antennas
- point
- representative
- concerned
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000011159 matrix material Substances 0.000 claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 238000007670 refining Methods 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 5
- 239000013598 vector Substances 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 3
- 238000012897 Levenberg–Marquardt algorithm Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/20—Position of source determined by a plurality of spaced direction-finders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
- G01H3/10—Amplitude; Power
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/48—Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
- G01S3/8006—Multi-channel systems specially adapted for direction-finding, i.e. having a single aerial system capable of giving simultaneous indications of the directions of different signals
Definitions
- the present invention relates to the technical field of acoustics and the processing of acoustic signals.
- It relates in particular to a method and a system for estimating a quantity representative of the sound energy.
- the present invention proposes a method for estimating a quantity representative of the sound energy at at least one point of a three-dimensional space where a plurality of antennas are located each comprising at least K acoustic sensors with K greater than or equal to 2, comprising the following steps:
- antennas each comprising at least 2 acoustic sensors (and preferably at least 4 acoustic sensors) makes it possible to finely analyze the sound field at the level of the antenna.
- the various signals resulting from this analysis make it possible to generate a matrix which accurately renders the sound field present at the level of the antenna.
- the sound field analysis is thus both rich and compact so that it is possible to correctly map the sound field at the antenna level.
- the number K of acoustic sensors per antenna is greater than or equal to 9. In the case of ambisonic signals of order 3, the number K of acoustic sensors per antenna antenna is greater than 16.
- the step of determining a raw value for a given antenna may include the following sub-steps:
- the estimation method can comprise, for each antenna of the plurality of antennas, a step of determining, on the basis of said matrix, a plurality of directional values of the magnitude representative of the sound energy received at the level of the antenna concerned respectively from a plurality of directions.
- the estimation method can further comprise in this case, for each antenna of the plurality of antennas, a step of determining raw values of said magnitude at a plurality of points on the basis of the directional values determined for the antenna concerned.
- the method can then comprise, for each point of said plurality of points, a step of determining an estimated value of said magnitude at the point concerned by combining the raw values determined for the different antennas of the plurality of antennas at the point concerned.
- the method may further include a step of refining the raw values using a beamforming technique using the estimated values for different points of the plurality of points.
- the estimated value of said quantity can be determined by application to the raw values of a function with several variables whose image is equal to zero for any antecedent comprising at least one zero variable, which makes it possible to determine in a relatively simple manner the estimated value of said quantity on the basis of the raw values.
- the estimated value of said quantity can, for example, be equal to the inverse of the sum of the inverses of the raw values.
- the estimated value of said quantity may be equal to the root M th of the product of the raw values, where M is the number of antennas of the plurality of antennas.
- the two-by-two combinations of representative signals are, for example, each an estimate of the mathematical expectation of the product of the representative signals concerned.
- the aforementioned representative signals can be produced by processing measurements respectively acquired by the acoustic sensors of the antenna concerned.
- the aforementioned quantity is, for example, the sound power.
- it could be the sound pressure (defined on the basis of the square root of the sound power).
- the present invention also relates to a system for estimating a quantity representative of the sound energy at at least one point of a three-dimensional space comprising: - a plurality of antennas each comprising at least K acoustic sensors and each designed to produce a plurality of signals representative of the sound field at the level of the antenna concerned and to determine a raw value of said magnitude at said point on the basis of minus K + 1 elements of a matrix based respectively on two-by-two combinations of representative signals produced by the antenna concerned, with K greater than or equal to 2; and
- a processor designed to determine an estimated value of said magnitude at said point by combining the raw values of said magnitude at said point determined respectively by the different antennas of the plurality of antennas.
- FIG. 1 schematically shows a system comprising a processor and a plurality of antennas
- FIG. 2 is a flowchart showing the main steps of a method for estimating a quantity representative of the sound energy in accordance with the invention
- FIG. 3 schematically shows a particular direction of space relative to one antenna of the plurality of antennas of Figure 1;
- FIG. 4 shows schematically a mesh of the space around the antenna of Figure 3;
- FIG. 5 is a flowchart showing a method of refining directional values using a beamforming technique
- FIG. 6 is a flowchart showing a process for refining raw and estimated values using a beamforming technique.
- the system represented in FIG. 1 comprises a processor P and a plurality of antennas (here M antennas) A 1, A m , A M.
- the different antennas A 1 , A m , A M are respectively located at different points of a three-dimensional space E.
- Each antenna in English: “array”
- a m comprises several acoustic sensors S i each capable of performing a measurement of a sound field present at the level of the acoustic sensor S i concerned.
- FIG. 1 schematically represents an acoustic wave emitted by a sound source ⁇ , but the invention applies regardless of the number of sound sources.
- each antenna A m comprises exactly K acoustic sensors (with K greater than or equal to 2, preferably K greater than or equal to 4), for example 35 acoustic sensors.
- K acoustic sensors
- some acoustic antennas could include more than K acoustic sensors.
- Each antenna A m also comprises a processing unit U designed to process the signals measured by the acoustic sensors S i of the antenna concerned, as explained below.
- Each antenna A m can also communicate with the processor P (for example by means of a wireless link or, as a variant, a wired link) in order to allow data exchanges between the processing unit U of this antenna A m and processor P.
- FIG. 2 represents the main steps of a method for estimating a quantity representative of the sound energy in accordance with the invention.
- the quantity used to represent sound energy is sound power.
- Steps E2 to E8 described now are implemented in each of the antennas A 1 , A m , A M.
- a m the reference of a single antenna is mentioned below:
- the method begins a step E2 of acquiring respective measurements by the K acoustic sensors S i of each antenna A m of the plurality of antennas.
- step E2 further comprises processing (by the processing unit U of each antenna A m ) of the measurements acquired by the K acoustic sensors S, of the antenna A m concerned in order to produce signals S k (t) representative of the sound field at the level of the antenna A m concerned.
- these signals S k (t) can be complex signals (ie represented as a complex number in order to define a modulus, or amplitude, and a phase) or real signals.
- signals S k (t) are for example ambisonic signals of order L.
- the number K of acoustic sensors is greater than or equal to the number N of signals S k (t) produced.
- the method then continues, at the level of each antenna A m (and by means of the processing unit U of the antenna A m concerned), with a step E4 of determining directional values p (m) ( ⁇ ) of the acoustic power received at the level of the antenna A m coming from a plurality of directions ⁇ .
- the processing unit U determines for example the directional value p (m) ( ⁇ ) for a set of directions ⁇ forming an angular mesh around the antenna concerned A m , each direction ⁇ corresponding to particular spherical angular coordinates ( ⁇ , ⁇ ), where ⁇ is the elevation (between 0 and ⁇ ) and ⁇ the azimuth (between 0 and 2TT).
- a mesh (such as a Lebedev mesh) comprising a number of directions between a few tens and several thousand (that is to say between 50 and 5000) is used for example in practice.
- each processing unit U determines for this purpose the elements of a covariance matrix C ss in which:
- each diagonal element is an estimate of the mathematical expectation of the square of the modulus of one of the signals S k (t) representative of the sound field (the covariance matrix C ss here comprises N diagonal elements);
- each non-diagonal element is an estimate of the mathematical expectation of the product of one s i (t) of the signals representative of the sound field by the conjugate of another s j (t) of the signals representative of the sound field (the covariance matrix C ss here includes N (N-1) non-diagonal elements).
- the covariance matrix C ss provides a set of statistical information on the spatial properties of the sound field, in particular on the position of sound sources and the more or less strong correlation of the signals they emit. From this point of view, each element of the matrix enriches the information and therefore makes it possible to refine the analysis carried out.
- the function E can be an indicator of the central tendency of the signal concerned over a predetermined number of samples of this signal (the samples used in the calculation of the central tendency indicator are generally the last samples produced).
- the function E is for example the (sliding) average of the signal over this predetermined number of (last) samples.
- the directional value p (m) ( ⁇ ) of the acoustic power received from a direction ⁇ is then written: where (.) H is the transpose-conjugate operator and where a ( ⁇ ) is a steering vector for the ⁇ direction defined as follows in the case of S k (t) ambisonic signals: where Y I q is the spherical harmonic function with real value of order I and of degree q and where the variables ⁇ and ⁇ represent the direction ⁇ in spherical coordinates.
- the directional values p (m) ( ⁇ ) obtained for a given antenna A m can optionally be refined by means of a formation technique.
- beam in English "beamforming technique", as described below with reference to Figure 5.
- the processing unit U of each antenna A m then performs a step E6 of determining raw values p (m) (r) of the acoustic power at a plurality of points in three-dimensional space E, the position of a point given by a vector of coordinates r.
- the points where the raw values p (m) (r) of acoustic power are determined are for example predefined and are the same for all the antennas A m. These points form for example a mesh of the region of the three-dimensional space of interest (region which therefore includes all the antennas A m ).
- FIG. 4 A part of this mesh around a particular antenna A m has been shown schematically in FIG. 4.
- the mesh shown in FIG. 4 is two-dimensional, but this mesh can be three-dimensional in practice.
- a number of points included between a few tens and tens of thousands (that is to say in practice between 50 and 50,000).
- only points situated in a given plane could be considered (as shown in FIG. 4).
- the raw value p (m) (r) of the sound power at that point is determined on the basis of the directional value r (m) ( ⁇ ) determined in step E4 for the direction w connecting this point and the antenna A m concerned, for example by interpolation of the directional values r (m) ( ⁇ ) determined in step E4.
- the possible directions vary in azimuth and in elevation, it may for example be an interpolation by spherical spline or using spherical harmonic functions. If the mesh is two-dimensional and where the directions considered thus extend in the plane of the mesh, one can use a linear or quadratic interpolation.
- the raw values p (m) (r) determined by this antenna A m are then transmitted in step E8 to the processor P.
- the processor P thus receives in step E10 all of the raw values p (m) (r) determined by all the antennas A m of the plurality of antennas.
- the processor P can thus determine in step E12, for all the points considered, an estimated value p (all) (r) of the acoustic power at the point concerned by combining the raw values p (m) (r) for this point received from the various antennas A m .
- the estimated value p (all) (r) for a given point (of coordinates r) is for example determined by applying, to the raw values p (m) (r) for this given point, a function f with several variables (the number of variables x 1 , x 2 , ..., x M being equal to the number of antennas) and whose image f (x 1 , x 2 , ..., x M ) is equal to zero for any antecedent ( x 1 , x 2 , ..., x M ) comprising at least one variable x, zero.
- p (all) (r) f (p (1) (r), p (2) (r), ..., p (M ) (r)).
- the estimated value p (all) (r) for a given point can be determined as follows:
- the estimated value p (all) (r) is equal to the inverse of the sum of the inverses of the M raw values p (m) (r).
- the processor determines the estimated value p (all) (r) for a given point can be determined as follows: In other words, in this case, the estimated value p (all) (r) is equal to the root M th of the product of the raw values p (m) (r).
- Figure 5 shows a method of refining directional values p (m) ( ⁇ ) using a beamforming technique.
- the implementation of this refining method for a particular antenna A m is described here, but the method may be implemented (for example by the processing unit U of the antenna concerned) for several of said antennas ( or even for all said antennas).
- this refining process can take place when a set of D directional values p (m) ( ⁇ i ) have been determined (as indicated above with regard to step E4) respectively for D directions ⁇ 1 , ..., ⁇ D
- V (m) W (m) A H (AW (m) A H + R) -1 , with
- W (m) is the diagonal matrix comprising (diagonally) the directional values p (m) ( ⁇ i ) previously determined for the D directions ⁇ 1 , ..., ⁇ D,
- R is a regularization matrix which makes it possible to take account of the presence of diffuse noise in the measured signals.
- W (m) diag (Z (m) )
- C ss (m) is the determined covariance matrix (as indicated above in step E4) for the antenna A m concerned (and at the instant concerned ), where diag is the operator which to the matrix Z (m) associates the diagonal matrix W (m) whose diagonal elements are identical to those of the matrix Z (m) (and whose other elements are zero).
- the new directional values ⁇ (m) ( ⁇ i ) present on the diagonal of the matrix W (m) thus obtained can be used for the rest of the process.
- Steps E20 and E22 can in practice be repeated several times to further refine the directional values ⁇ (m) ( ⁇ i ).
- Figure 6 shows a method of refining the raw values p (m) (r) and the estimated values p (all) (r) by means of a beamforming technique
- This refining process begins with a step E30 at which the processor P determines, for each antenna A m , a matrix V (m) as follows:
- V ( m) w (all) A (m) H (A (m) W (all) A (m) H + R) -1 , with
- a (m) a matrix obtained by concatenating the pointing vectors a ( ⁇ i ) defined, for a set of T points (of the region of interest) identified by vectors r 1 , r 2 , ..., r ⁇ , by the direction ⁇ , connecting the antenna A m to the point r i concerned (the pointing vector associated with a particular direction being defined above),
- W (m) is the diagonal matrix comprising (diagonally) the estimated values p (all) (n) previously determined for the T points of coordinates r 1 , r 2 , ..., r T ,
- R is a regularization matrix which takes into account the presence of diffuse noise in the measured signals and of sound sources present outside the region of interest.
- the refining process continues with a step E32 of determining, for each antenna A m , refined raw values p ( m) (r i ).
- the processor P determines the matrix V (m) C ss (m) V (m) H , the refined raw values p (m) (r 1 ), p (m) (r2), ..., p (m) (r T ) then being the diagonal elements of this matrix V (m) C ss (m) V (m) H (the matrix C ss (m) being, as previously, the covariance matrix determined in step E4 for the antenna A m concerned).
- Steps E30 to E34 can in practice be repeated several times to further refine the raw values p (m) (r i ) and the estimated values p (all) (r i ).
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1915670A FR3105823B1 (fr) | 2019-12-27 | 2019-12-27 | Procédé et système d’estimation d’une grandeur représentative de l’énergie sonore |
PCT/EP2020/087212 WO2021130132A1 (fr) | 2019-12-27 | 2020-12-18 | Procédé et système d'estimation d'une grandeur représentative de l'énergie sonore |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4081769A1 true EP4081769A1 (fr) | 2022-11-02 |
Family
ID=70295304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20830216.6A Pending EP4081769A1 (fr) | 2019-12-27 | 2020-12-18 | Procédé et système d'estimation d'une grandeur représentative de l'énergie sonore |
Country Status (4)
Country | Link |
---|---|
US (1) | US20230031343A1 (fr) |
EP (1) | EP4081769A1 (fr) |
FR (1) | FR3105823B1 (fr) |
WO (1) | WO2021130132A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3131164B1 (fr) | 2021-12-16 | 2023-12-22 | Fond B Com | Procédé d’estimation d’une pluralité de signaux représentatifs du champ sonore en un point, dispositif électronique et programme d’ordinateur associés |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1331490B1 (fr) * | 2000-10-02 | 2008-06-04 | Chubu Electric Power Co., Inc. | Systeme de sondage d'une source sonore |
US8204247B2 (en) * | 2003-01-10 | 2012-06-19 | Mh Acoustics, Llc | Position-independent microphone system |
US7643377B1 (en) * | 2005-08-09 | 2010-01-05 | Uzes Charles A | System for detecting, tracking, and reconstructing signals in spectrally competitive environments |
FR2971341B1 (fr) * | 2011-02-04 | 2014-01-24 | Microdb | Dispositif de localisation acoustique |
US9524735B2 (en) * | 2014-01-31 | 2016-12-20 | Apple Inc. | Threshold adaptation in two-channel noise estimation and voice activity detection |
US9560441B1 (en) * | 2014-12-24 | 2017-01-31 | Amazon Technologies, Inc. | Determining speaker direction using a spherical microphone array |
US10264351B2 (en) * | 2017-06-02 | 2019-04-16 | Apple Inc. | Loudspeaker orientation systems |
US10051366B1 (en) * | 2017-09-28 | 2018-08-14 | Sonos, Inc. | Three-dimensional beam forming with a microphone array |
-
2019
- 2019-12-27 FR FR1915670A patent/FR3105823B1/fr active Active
-
2020
- 2020-12-18 EP EP20830216.6A patent/EP4081769A1/fr active Pending
- 2020-12-18 WO PCT/EP2020/087212 patent/WO2021130132A1/fr unknown
- 2020-12-18 US US17/789,440 patent/US20230031343A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021130132A1 (fr) | 2021-07-01 |
FR3105823B1 (fr) | 2021-12-03 |
US20230031343A1 (en) | 2023-02-02 |
FR3105823A1 (fr) | 2021-07-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3824280B1 (fr) | Procédés et systèmes de caractérisation ultrasonore non invasive d'un milieu hétérogène | |
EP1546916B1 (fr) | Procede et systeme de traitement d'une representation d'un champ acoustique | |
FR2995754A1 (fr) | Calibration optimisee d'un systeme de restitution sonore multi haut-parleurs | |
EP4081769A1 (fr) | Procédé et système d'estimation d'une grandeur représentative de l'énergie sonore | |
Foster et al. | Implementation of a direct-imaging and FX correlator for the BEST-2 array | |
EP1502475B1 (fr) | Procede et systeme de representation d un champ acoustique | |
EP3671250B1 (fr) | Interféromètre numérique à sous-échantillonnage | |
FR2839157A1 (fr) | Systeme d'imagerie ultrasonore a haute resolution laterale | |
FR3098367A1 (fr) | Procédé et dispositif de codage d’une séquence d’hologrammes numériques | |
EP3025342B1 (fr) | Procédé de suppression de la réverbération tardive d'un signal sonore | |
FR3026493A1 (fr) | Procede et dispositif d'imagerie acoustique. | |
FR2754362A1 (fr) | Procede de visualisation d'une image d'une source d'ondes | |
EP3672088A1 (fr) | Interféromètre bipolarisation numérique à sous-échantillonnage | |
WO1990011494A1 (fr) | Procede et dispositif d'analyse spectrale en temps reel de signaux instationnaires complexes | |
EP0197582B1 (fr) | Procédé et appareil d'exploration de milieux par échographie ultrasonore | |
WO2022106765A1 (fr) | Localisation perfectionnée d'une source acoustique | |
EP2929343B1 (fr) | Dispositif et procédé d'imagerie par ultrasons avec filtrage des artefacts dus aux interférences entre modes de reconstruction | |
WO2023110549A1 (fr) | Procédé d'estimation d'une pluralité de signaux représentatifs du champ sonore en un point, dispositif électronique et programme d'ordinateur associés | |
EP3934282A1 (fr) | Procédé de conversion d'un premier ensemble de signaux représentatifs d'un champ sonore en un second ensemble de signaux et dispositif électronique associé | |
WO2023046906A1 (fr) | Procede et dispositif d'analyse d'un milieu | |
FR3038391B1 (fr) | Procede et dispositif de traitement d'un signal spectral | |
EP1371958A1 (fr) | Procédé et dispositif d'extraction de signature spectrale d'une cible ponctuelle | |
EP4166931B1 (fr) | Méthode de cartographie multi-espèces d'une zone à partir de données spectrales | |
FR2889770A1 (fr) | Procedes et appareils pour realiser de maniere adaptative la suppression algebrique de signaux parasites | |
EP1605440A1 (fr) | Procédé de séparation de signaux sources à partir d'un signal issu du mélange |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20220623 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20240311 |