EP1238567A2 - Procede destine a fixer la position hi-fi d'un systeme audio - Google Patents

Procede destine a fixer la position hi-fi d'un systeme audio

Info

Publication number
EP1238567A2
EP1238567A2 EP00984861A EP00984861A EP1238567A2 EP 1238567 A2 EP1238567 A2 EP 1238567A2 EP 00984861 A EP00984861 A EP 00984861A EP 00984861 A EP00984861 A EP 00984861A EP 1238567 A2 EP1238567 A2 EP 1238567A2
Authority
EP
European Patent Office
Prior art keywords
hifi
loudspeaker
loudspeakers
microphone
signals
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.)
Granted
Application number
EP00984861A
Other languages
German (de)
English (en)
Other versions
EP1238567B1 (fr
Inventor
Stefan Rychlak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1238567A2 publication Critical patent/EP1238567A2/fr
Application granted granted Critical
Publication of EP1238567B1 publication Critical patent/EP1238567B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Definitions

  • the present invention relates to a method for determining the HIFI position of an audio system, in particular a car radio, with at least two loudspeakers, the volume and / or transit time of the individual loudspeaker signals being measured and the volume and / or phase of the loudspeaker signals emitted as a function of the result the measurement can be changed.
  • the invention further relates to a device for performing this method.
  • a method of the type mentioned at the outset is known from the prior art of car radios (for example car radio Blau Vietnamese fries RCM 127, company Bosch, Germany).
  • a supplied microphone is attached to the headlining with the opening facing downwards. This can be done in particular for a first position above the driver and for a second position above the front passenger seat.
  • the calibration process is then started by pressing a button.
  • the loudspeakers of the car radio send test signals separately and at different frequencies, which are recorded by the microphone.
  • a 9-way equalizer is then adapted for each of the four speaker positions.
  • This so-called DSA system uses a digital signal processor to determine the acoustic frequency response in the vehicle interior via the measuring microphone and to control the equalizer.
  • the equalizer is a tone control device, with which the volume of several frequency bands of the entire audio frequency range can be controlled separately for equalization, correction or other influencing of the sound image.
  • a calm environment must be available for the measurements. External noise falsifies the measurement. There should therefore be no occupants in the vehicle and objects must not interfere with the emission of the volume.
  • the measuring process is therefore relatively cumbersome and requires a complex procedure to be carried out by the user.
  • a new definition or change in the HIFI position requires a new, equally complex measurement process every time.
  • the provision of a separate microphone with appropriate cabling and the plug connections on the car radio causes a correspondingly high cost.
  • the object of the present invention was to improve a method of the type mentioned at the outset in such a way that it can be carried out in a simplified manner, offers more sound options and allows greater freedom of position for the setting of the HIFI positions. Furthermore, an inexpensive to manufacture device for carrying out the method should be developed.
  • the volumes and / or the transit times of the individual loudspeaker signals are measured and the volumes and / or phases of the emitted loudspeaker signals are changed depending on the result of this measurement.
  • the method is characterized in that the measurement takes place at a reference position and from this the changes in the loudspeaker signals necessary to shift the HIFI position are calculated.
  • a microphone does not have to be attached to this position to determine the desired HIFI position, so that the loudspeaker signals can be measured and changed for this position. Rather, the measurement is carried out at a more or less freely selectable reference position, a single measurement generally being sufficient for any number of subsequent changes in the HIFI position.
  • the definition of a new HIFI position is considerably simplified, since no own measurement with a microphone at the desired position is necessary for this, but because the required parameters can be determined by calculations from the one-time measurement at the reference position. However, such calculations can be automated and therefore do not burden the user of the audio system.
  • the method preferably measures and changes the loudspeaker signals separately in different frequency ranges. Taking into account the frequency dependency of the acoustics allows a significant improvement in the achievable sound quality.
  • Claim 3 shows a further development of the method, which allows a particularly simple determination of the necessary changes in the loudspeaker signals for a desired HIFI position.
  • the reference positions on measured volumes of a first loudspeaker or a second loudspeaker, gain correction factors ⁇ or f 2 for said first loudspeaker or second loudspeaker are determined in such a way that application of these amplification factors to the respective loudspeaker leads to the signals of these loudspeakers then at the reference position achieve the same volume or a desired delay time difference (especially zero).
  • the application of these gain correction factors makes the reference position the optimal HIFI position.
  • the factors can also be multidimensional (vectors) to allow different amplifications for different frequency bands.
  • the HIFI position in space can now be shifted by specifying a single (scalar) parameter ⁇ , the gain factor for a given ⁇ being the first loudspeaker
  • the described method has the effect that the HIFI position can be shifted along an axis parallel to the connecting line of the two loudspeakers with the aid of the parameter ⁇ . If doing so the reference position at the level of one of the loudspeakers, the parameter ⁇ will move primarily in the range between 0 and 1, whereby the HIFI position is accordingly shifted between the two loudspeakers.
  • a control method is particularly advantageous for shifting the HIFI position in the direction of the vehicle axis (from front to back and back). This applies in particular if the reference position is at the height of the front loudspeaker, which is usually the case when the reference position is integrated into the car radio.
  • the invention further comprises a device according to claim 4 for carrying out the above-described method, which contains a microphone integrated in the audio system for measuring the loudspeaker signals at the reference position, and an adjusting device for changing the emitted loudspeaker signals. Due to the fixed installation of the microphone for measuring the audio system, there is no need for a separate microphone with complex cabling and with suitable plug-in systems compared to the known systems. This reduces the manufacturing costs of the audio system or car radio. Furthermore, with such a device, the advantages which can be achieved with the above-described method can be realized, that is to say in particular a simpler and more flexible determination of the HIFI position.
  • the adjusting device of the device preferably contains an equalizer for each of the connected loudspeakers.
  • the device contains at least one input device for specifying the desired HIFI position by the user.
  • Such an input device can be, in particular, an adjustment button or adjustment slide or act like that.
  • two such input devices are provided, which shift the HIFI position in mutually orthogonal spatial directions.
  • a third device can be provided which shifts the HIFI position in a third spatial direction orthogonal to the first two spatial directions.
  • the spatial directions that are perpendicular to one another are primarily parallel or perpendicular to the vehicle axis. This means that the right / left position of the HIFI position can be set using one controller and the front / rear position can be specified using another controller (fading, balance).
  • the figure shows schematically the conditions in a car which contains a car radio 10 and four loudspeakers RF, RR, LR, LF arranged approximately at the corners of a rectangle.
  • Car radio is generally to be understood as an audio system used in a car, which in particular can contain a cassette recorder and / or a CD player.
  • the sound waves emanating from the loudspeakers (indicated by arrows) reach different points in the room at different times and with different volumes, since they have to travel differently long and differently shaped paths to these points.
  • the optimal HIFI position is the position in the room where all loudspeaker signals arrive at the "right" time and at the "right” volume, which correspond to the conditions in the real sound recording. It is therefore endeavored to change the amplification of the individual Speaker and, if necessary, by changing their phase (time correction) to move the HIFI position to the location of the room where the listener (e.g. driver or passenger) is sitting.
  • a microphone is brought to the desired HIFI position for this purpose and the parameters of the loudspeaker signals are then corrected until the HIFI position comes to rest on the location of the microphone.
  • this requires a complex measurement procedure for each new desired HIFI position using a microphone separate from the car radio.
  • a microphone 11 is placed and permanently installed in the cap of the car radio in a car radio 10 according to the present invention.
  • the opening of the microphone points into the vehicle interior.
  • the individual loudspeakers separately emit signals in different frequency ranges, the arrival of which is recorded on the microphone 11.
  • the measured volume values and any runtimes are stored digitally.
  • These digitized LF signals can then preferably be processed in a microprocessor (for example a DSA module).
  • the speaker LF measures +8 dB and the speaker LR - 4 dB when measuring for 100 Hz
  • the gain for speaker LF at 100 Hz should be reduced by 8 dB
  • the level for speaker LR should be reduced 4 dB is raised.
  • the parameters of the other speakers are changed accordingly. way. After these measures, the HIFI position 12 should be at the microphone 11.
  • the shift of the HIFI position to another desired listening position 13 can be described as follows.
  • the approach to the listening position 13 is realized with a setting option of, for example, 24 steps from the loudspeaker LF to the loudspeaker LR.
  • the difference in the gain correction factors between these two speakers is calculated and divided into 24 steps.
  • 100 Hz and changes from LR to LF the following settings can be made:
  • a "fader function at 100 Hz" is therefore carried out between the measured values LF and LR.
  • the position is set for each band frequency of the equalizer with balance and fader.
  • the basic values between which can be set are the measured values of the microphone.
  • the individual tapes are usually not made by the user.
  • the user can move the HIFI position, for example, with a GEO key.
  • the balance can typically be shifted with +/- 12 steps and the fader with +/- 12 steps.
  • the individual frequency bands are adjusted individually in the background. The process is used to approximate the listening position to the measured HIFI position, treble and bass boost can be adjusted afterwards.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Stereophonic System (AREA)

Abstract

L'invention concerne un procédé et un dispositif destinés à déplacer la position HI-FI (13) à l'intérieur d'un véhicule, consistant dans un premier temps à effectuer une mesure dépendant de la fréquence, à l'aide d'un micro (11) intégré dans l'autoradio (10), des puissances sonores délivrées par les enceintes (LF, LR, RF, RR) sur une position de référence. A l'aide des données relevées, les signaux d'enceinte individuels peuvent être modifiés de manière ciblée en volume sonore et/ou en phase afin de déplacer la position HI-FI vers une position souhaitée (13).
EP00984861A 1999-12-08 2000-10-25 Procede destine a fixer la position hi-fi d'un systeme audio Expired - Lifetime EP1238567B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19959025 1999-12-08
DE19959025A DE19959025A1 (de) 1999-12-08 1999-12-08 Verfahren zur Festlegung der HIFI-Position eines Audiosystems
PCT/DE2000/003762 WO2001043502A2 (fr) 1999-12-08 2000-10-25 Procede destine a fixer la position hi-fi d'un systeme audio

Publications (2)

Publication Number Publication Date
EP1238567A2 true EP1238567A2 (fr) 2002-09-11
EP1238567B1 EP1238567B1 (fr) 2004-06-02

Family

ID=7931765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00984861A Expired - Lifetime EP1238567B1 (fr) 1999-12-08 2000-10-25 Procede destine a fixer la position hi-fi d'un systeme audio

Country Status (5)

Country Link
EP (1) EP1238567B1 (fr)
JP (1) JP2003516687A (fr)
DE (2) DE19959025A1 (fr)
ES (1) ES2222258T3 (fr)
WO (1) WO2001043502A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4501759B2 (ja) * 2005-04-18 2010-07-14 船井電機株式会社 音声コントローラ
EP1792662A1 (fr) 2005-11-30 2007-06-06 Microflow Engineering SA Appareil de distribution de gouttelettes
JP4839924B2 (ja) 2006-03-29 2011-12-21 ソニー株式会社 車載用電子機器、車内空間の音場最適化補正方法及び車内空間の音場最適化補正システム
CN104270695B (zh) * 2014-09-01 2018-07-31 歌尔股份有限公司 一种自动调整车内声场分布的方法和系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63177604A (ja) * 1986-10-29 1988-07-21 Mazda Motor Corp 車両用音響機器制御装置
JPH0646499A (ja) * 1992-07-24 1994-02-18 Clarion Co Ltd 音場補正装置
JPH07274282A (ja) * 1994-03-31 1995-10-20 Suzuki Motor Corp 車輌用音響装置の調整方法およびその装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0143502A2 *

Also Published As

Publication number Publication date
ES2222258T3 (es) 2005-02-01
WO2001043502A2 (fr) 2001-06-14
JP2003516687A (ja) 2003-05-13
EP1238567B1 (fr) 2004-06-02
DE19959025A1 (de) 2001-06-13
DE50006705D1 (de) 2004-07-08
WO2001043502A3 (fr) 2002-01-31

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