EP2247122A1 - Procédé et dispositif de contrôle de la diffusion de contenus audio par deux haut-parleurs - Google Patents

Procédé et dispositif de contrôle de la diffusion de contenus audio par deux haut-parleurs Download PDF

Info

Publication number
EP2247122A1
EP2247122A1 EP10160535A EP10160535A EP2247122A1 EP 2247122 A1 EP2247122 A1 EP 2247122A1 EP 10160535 A EP10160535 A EP 10160535A EP 10160535 A EP10160535 A EP 10160535A EP 2247122 A1 EP2247122 A1 EP 2247122A1
Authority
EP
European Patent Office
Prior art keywords
audio content
speaker
audio
processing
auxiliary
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.)
Withdrawn
Application number
EP10160535A
Other languages
German (de)
English (en)
French (fr)
Inventor
Vianney Taufour
Gaël Lassure
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.)
STMicroelectronics Grenoble 2 SAS
Original Assignee
STMicroelectronics Grenoble 2 SAS
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 STMicroelectronics Grenoble 2 SAS filed Critical STMicroelectronics Grenoble 2 SAS
Publication of EP2247122A1 publication Critical patent/EP2247122A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation

Definitions

  • the invention relates to the broadcasting of audio contents by loudspeakers having in particular a large directivity angle.
  • the right and left speakers generally have a large directivity, it is not possible to deliver the sound of both audio programs simultaneously (for example, using the left speaker for the left program and the right speaker for the right program). Indeed, the sound will be mixed acoustically and people watching television will hear both audio programs simultaneously.
  • a conventional solution is to broadcast audio content on the speakers while the other audio content is broadcast on a headphone jack.
  • a person wishing to listen to an auxiliary audio program must purchase additional equipment (eg headphones) to be able to listen to his audio program without disturbing the other listener.
  • additional equipment eg headphones
  • the number of people watching the program is limited by the number of headphones that can be connected to the TV.
  • a method and a device are provided for controlling the directivity of the loudspeakers so as to create two independent zones allowing, for example, a visually impaired person to hear an audio description.
  • a TV program without the broadcast of this audio description may interfere with another viewer, not visually impaired, who simultaneously watching the same TV program.
  • the development of the third audio content comprises, in addition to the inversion of the auxiliary content, an amplification of the inverted auxiliary content with a gain whose value depends on said distance, and a compensation processing of the non-linearity of the frequency response the second speaker, along an axis connecting the second speaker to said location.
  • this pretreatment comprises at least a first and a second elementary processing monophonic auxiliary content, each elementary processing containing a band-pass filtering followed by dynamic compression processing and a summation of signals respectively from said elementary treatments.
  • the pretreatment comprises prior to the elementary treatments that have just been mentioned, a transformation of the stereophonic auxiliary audio content into a monophonic auxiliary audio content.
  • the pretreatment further comprises a third elementary treatment comprising a low-pass filter followed by dynamic compression processing.
  • a fourth elementary treatment comprising a high-pass filtering followed by dynamic compression processing.
  • a method of controlling the broadcasting of audio contents by two loudspeakers which is for example more particularly intended for the simultaneous broadcasting of two television programs by the loudspeakers. speakers of the same TV.
  • the television viewer placed in front of the left speaker visualizes on the left side of the television the first television program, and perceives the audio content relating to this first television program, without perceiving the audio content relating to the second television program.
  • the viewer located in front of the right speaker visualizes the second television program on the right side of the television, and perceives the audio content relating to the second television program without being bothered by the audio content relating to the first program of TV.
  • the development of the third audio content further comprises an amplification of the first content inverted audio with a gain whose value depends on the first distance, and a compensation processing of the non-linearity of the frequency response of the second speaker along an axis connecting the second speaker to said first location; and the development of the sixth audio content further comprises an amplification of the fourth inverted audio content with a gain whose value depends on the second distance, and a compensation processing of the non-linearity of the frequency response of the first speaker the along an axis connecting the first speaker to said second location.
  • Each pretreatment may advantageously comprise a third elementary treatment comprising a low-pass filter followed by dynamic compression processing and / or a fourth elementary treatment comprising high-pass filtering followed by dynamic compression processing.
  • this additional audio content may be audio content of sound environment.
  • the second generation means further comprise amplification means configured to amplify the inverted auxiliary audio content with a gain whose value depends on said distance, and a processing block configured to carry out a processing of compensating for the non-linearity of the frequency response of the second speaker along an axis connecting the second speaker to said location.
  • the auxiliary audio content is a monophonic content and the device further comprises a preprocessing module coupled between the receiving means and the first and second means of production, this preprocessing module comprising at least a first and a second processing branches of the monophonic auxiliary audio content, each processing branch containing bandpass filtering means followed by a dynamic compression processing block, and summing means coupled to the outputs of the processing branches.
  • the device furthermore comprises a preprocessing module coupled between the reception means and the first and second means of elaboration, this preprocessing module comprising a stage of transforming the stereophonic auxiliary audio content into monophonic auxiliary audio content, at least first and second processing branches of the monophonic auxiliary audio content, each processing branch containing bandpass filtering means followed by a compression processing block dynamics, and summing means coupled to the outputs of the processing branches.
  • this preprocessing module comprising a stage of transforming the stereophonic auxiliary audio content into monophonic auxiliary audio content, at least first and second processing branches of the monophonic auxiliary audio content, each processing branch containing bandpass filtering means followed by a compression processing block dynamics, and summing means coupled to the outputs of the processing branches.
  • the preprocessing module further comprises a third processing branch comprising low-pass filtering means followed by a dynamic compression processing block.
  • the preprocessing module further comprises a fourth processing branch comprising high-pass filtering means followed by a dynamic compression processing block.
  • a device for controlling the broadcasting of audio contents by two loudspeakers comprising first reception means configured to receive a first audio content, first generating means configured to develop a second audio content having first delay means configured to temporally delay the first audio content with a delay dependent on the spacing between the speakers and a first distance between a first speaker and a second speaker; speaker and a first place in front of that first speaker, first delivery means configured to deliver the second audio content to that first speaker, second generating means configured to develop a third audio content having first inversion means configured to invert the first audio content, second delivery means configured to deliver the third audio content to the second speaker, second reception means configured to receive a fourth audio content, third developing means configured to develop a fifth audio content having second delay means configured to temporally delay the fourth audio content with a delay depending on the spacing between the speakers and a second distance between the second speaker; speaker and a second location opposite this second speaker, third delivery means configured to deliver the fifth audio content to that second speaker, fourth generation means configured to develop a sixth
  • the second elaboration means further comprise first amplification means configured to amplify the first inverted audio content with a gain whose value depends on the first distance, and a first processing block configured to perform compensation processing of the non-linearity of the frequency response of the second speaker along an axis connecting the second speaker to said first location
  • the fourth generation means further comprise second amplification means configured to amplify the fourth inverted audio content with a gain whose value depends on the second distance, and a second processing block configured to perform a compensation processing of the second non-linearity of the frequency response of the first speaker along an axis connecting the first speaker to said second location.
  • the first and fourth audio contents are stereophonic contents and the device further comprises a first pretreatment module coupled between the first reception means and the first and second elaboration means and a second coupled preprocessing module. between the second reception means and the third and fourth generation means, each pretreatment module comprising a stage for transforming the corresponding stereophonic audio content into monophonic audio content, at least a first and a second processing branch of the monophonic audio content, each branch containing bandpass filtering means followed by a block dynamic compression processing, and summing means coupled to the outputs of said processing branches.
  • each preprocessing module further comprises a third processing branch comprising low-pass filtering means followed by a dynamic compression processing block.
  • each preprocessing module further comprises a fourth processing branch comprising high-pass filtering means followed by a dynamic compression processing block.
  • the device may further comprise means capable of delivering additional audio content to the two loudspeakers.
  • the device can be incorporated in a signal processing processor.
  • the reference DISP designates a device for controlling the broadcasting of audio contents on the HPD and HPG loudspeakers of a television set, for example.
  • This device comprises at its head a digital receiver REC receiving a television signal for example, and delivering a digital signal DSTR to a first audio decoder AD1 of conventional structure and known per se, and a second decoder AD2 also of conventional structure and known in itself.
  • the digital flow DSTR comprises in fact a first audio content relating for example to a television program, as well as auxiliary audio content, for example an audio description of this television program.
  • the first audio content is decoded in the audio decoder AD1, while the auxiliary content is decoded in the audio decoder AD2 which delivers here a monophonic output.
  • the first audio decoder AD1 thus delivers on its two left and right outputs the first audio content CAD1G and CAD1D to a stereophonic mixer MIX of conventional structure and known per se.
  • the monophonic output of the decoder AD2 delivers the auxiliary audio content CADX to a preprocessing block MPTR which will be discussed in more detail below on the structure.
  • the signal coming from the MPTR block undergoes a first processing process in first RTD generation means so as to provide a second audio content CADX2.
  • this processing is a time delay of the auxiliary audio content with a delay T which depends on the geometry of the television and more particularly on the spacing W between the speakers of the television set ( figure 2 ) and a distance D between a first speaker, for example the left speaker HPG, and a place located in front of the first speaker and where stands for example a first viewer AUDIT1.
  • the second audio content CADX2 is delivered on the left channel G of the mixer MIX.
  • the signal from the preprocessing block MPTR is also subjected to another processing in second processing means, so as to provide a third audio content CADX3.
  • This second processing process comprises inverting the signal in an inverter INV so as to provide an inverted signal SINV. Then, optionally but preferentially, the inverted signal is amplified with a gain G whose value depends on the distance D. This gain adjustment is performed in an AMPX amplifier.
  • the amplified signal undergoes equalization Eq in an EQ equalizer of conventional structure and known per se, so as to compensate for the non-linearity of the frequency response of the second speaker, here the right speaker HPD, along an axis Ax ( figure 2 ) connecting this second loudspeaker HPD to the location C where the viewer AUDT1 is located ( figure2 ).
  • the third audio content CADX3 delivered by the equalizer EU is delivered on the right channel D of the mixer MIX.
  • the audio signal delivered to the location B by the speaker HPD is the inverted signal SINV.
  • the signal delivered to location A by the left speaker is the delayed signal CADX2.
  • the speakers HPD and HPG do not deliver the first audio signal CAD1.
  • T delta_d / vs
  • the delay therefore depends on the distance D and the spacing w between the loudspeakers.
  • the viewer AUDT1 does not perceive the auxiliary audio content relating to the audio description of the television program.
  • the viewer AUDT2 located at the location D, in front of the right speaker HPD, actually perceives the auxiliary content with an amplitude substantially equal to twice the amplitude of this auxiliary content.
  • the auditor AUDT1 who is not visually impaired, normally perceives this content CAD1 without being disturbed by the audiodescription of the television program, whereas the auditor AUDT2, who is visually impaired, hears the audio content CAD1 as well as the audiodescription of the program that is being broadcast by the TV.
  • this implementation and embodiment of the invention makes it possible to control the directivity of the speakers, which basically have a very wide directivity angle.
  • the inverted signal SINV undergo a gain adjustment in the AMPX amplifier.
  • the gain G is then a function of the distance D.
  • BOY WUT dB - 20 ⁇ log ⁇ D / D + delta_d
  • This gain is there to compensate the additional attenuation due to the distance difference between the viewer AUDT1 and each of the speakers.
  • the frequency response following the alpha (off-axis) angle of a loudspeaker is characterized by high frequency attenuation.
  • This attenuation may vary depending on the nature of the speakers used.
  • ⁇ o is the cutoff frequency and G the gain.
  • G is a function of the speaker used and the alpha angle.
  • the various signals CAD1G, CAD1D, CADX2 and CADX3 are mixed in the stereo mixer MIX. Then, the two left and right channels are converted into a CNA digital conversion stage before being amplified in an AMP amplifier and then delivered to the speakers HPG and HPD.
  • CADX signal delivered by the decoder AD2 is a stereophonic signal
  • a transformation of the stereophonic auxiliary audio content into a monophonic auxiliary content in a conventional stereophonic / monophonic transformation stage ETTF is first provided.
  • the MPTR block also comprises several processing branches, here four processing branches BR1, BR2, BR3 and BR4.
  • the treatment branches BR1 and BR2 make it possible to improve the auditory quality of the dialogs.
  • the characteristics of the four treatment branches are adapted according to these frequencies. Examples of adaptation are given below.
  • the first processing branch BR1 first comprises a bandpass filtering performed in filtering means FLTBB1.
  • the band concerned here is the band 150Hz - 500Hz.
  • the second processing branch BR2 also comprises a bandpass filtering performed in FLTBB2 filtering means. But this time, the band concerned is the band immediately higher, namely the band 500Hz ⁇ 3.5kHz
  • Each processing branch furthermore comprises, following the filtering means, a dynamic compression block BEXDi.
  • a dynamic compression block has a conventional structure and is known per se.
  • a dynamic compression block reduces the dynamics of the audio signal.
  • Compression is usually defined by a ratio a: b which means that the input level of the signal must increase by “a” decibels to create an increase of “b” decibels at the output, and this when the signal level of entry exceeds a certain threshold.
  • attack time A the response time of the compressor when the input level exceeds this threshold.
  • re-amplification time D the duration of attack.
  • the dynamic compression blocks BEXD1 and BEXD2 have ratios that can be between 1: 2 and 1: 5 with A values of the order of 10 milliseconds and D values between 100 and 400 milliseconds.
  • the pretreatment module MPTR advantageously comprises a third processing branch BR3 also comprising filtering means and a dynamic compression block.
  • the filtering means FLTBB3 of the processing branch BR3 are this time low-pass filtering means having a cutoff frequency of the order of 150 Hz and allow homogenization of the entire signal so as to reduce in particular the acoustic characteristics of the sound environment.
  • the ratio of the dynamic compression block BEXD3 can vary this time between 1: 2 and 1: 10 while the value A can be taken equal to 50 milliseconds and the value D between 200 and 500 milliseconds.
  • the pretreatment module MPTR also preferably comprises a fourth processing branch BR4, comprising high-pass filtering means FLTBB4 having a cut-off frequency of the order of 3.5 kHz, also followed by a dynamic compression block BEXD4 whose The ratio can vary between 1: 2 and 1: 4 with a constant A equal to 3 milliseconds and a constant D also between 50 and 300 milliseconds.
  • the fourth branch of treatment will allow in particular to correct the brightness and clarity of sound.
  • the outputs of the four processing branches are summed and the resulting signal is output to the BSS output of the preprocessing module.
  • the different filtering means can preferably be made with finite impulse response filters having linear phases, or with infinite impulse response filters, such as biquadratic filters.
  • the entire device DISP can be incorporated into a DSP processing processor that can itself be incorporated into a set top box or directly into the TV.
  • a TV set simultaneously broadcasts two programs on the screen, ie on the left side of the screen, a PRP main program and on the right side of the screen a PRX auxiliary program.
  • each speaker has a broad directivity DVG, DVD.
  • these angles are such that an auditor AUDT1 located in front of a loudspeaker can also perceive the sound emitted by the other speaker.
  • the device DISP comprises in a similar way to what has been described with reference to the figure 1 a digital receiver REC delivering the digital stream DSTR comprising a first audio content relating to the main program PRP and other audio content relating to the auxiliary program PRX.
  • Each of the audio contents is decoded in a respective audio decoder AD1, AD2.
  • the corresponding decoded stereo audio contents are pretreated in respective MPTR1 and MPTR2 pretreatment modules of structures analogous to that of the MPTR pretreatment module described with reference to FIG. figure 3 .
  • the preprocessing module MPTR1 thus delivers the first audio content CAD1, while the preprocessing module MPTR2 delivers a CAD4 audio content that is called here fourth audio content.
  • the stage CCN comprises first means of production, comprising first delay means RTD1, configured to temporally delay the first audio content CAD1 with a delay T1 depending on the spacing W between the loudspeakers, and a first distance D1 between a first speaker (for example the right loudspeaker HPD), and a first place located opposite this first speaker and where the viewer AUDT2 stands.
  • first delay means RTD1 configured to temporally delay the first audio content CAD1 with a delay T1 depending on the spacing W between the loudspeakers, and a first distance D1 between a first speaker (for example the right loudspeaker HPD), and a first place located opposite this first speaker and where the viewer AUDT2 stands.
  • the delay means RTD1 deliver the second audio content CAD2.
  • the stage CCN also comprises second processing means comprising first inversion means INV1 for reversing the first audio content CAD1. These first inversion means are followed by first amplification means AMPX1 and first equalization means EQ1.
  • the first equalization means deliver the third audio signal CAD3.
  • the gain adjustment G1 depends on the first distance D1 while the equalization Eq depends on the angle alpha1.
  • the stage CCN also comprises third generation means comprising second delay means RTD2 configured to temporally delay the fourth audio content CAD4 with a delay T2 depending on the spacing W between the speakers and a second distance D2 between the second speaker (here the HPG left speaker) and a second place located in face of this second speaker and where stands the viewer AUDT1.
  • second delay means RTD2 configured to temporally delay the fourth audio content CAD4 with a delay T2 depending on the spacing W between the speakers and a second distance D2 between the second speaker (here the HPG left speaker) and a second place located in face of this second speaker and where stands the viewer AUDT1.
  • the second delay means RTD2 deliver a fifth audio content CAD5.
  • the CCN stage also comprises fourth generation means comprising second inversion means INV2 configured to perform a reversal of the fourth audio content CAD4.
  • second inversion means INV2 are followed by second amplification means AMPX2 and second equalization means EQ2 which deliver a sixth audio content CAD6.
  • the gain adjustment made in the second amplification means AMPX2 depends on the second distance D2 while the equalization processing Eq depends on the angle alpha2.
  • the third audio content CAD3 and the fifth audio content CAD5 are summed in a first adder ADD1 in order to be delivered on the left channel G of the mixer MIX (not shown for simplification purposes). figure 5 ).
  • the second audio content CAD2 and the sixth audio content CAD6 are summed in a second adder ADD2 before being delivered on the right channel D of the mixer MIX.
  • the sound distribution space of the loudspeakers comprises three zones, namely a zone ZPRP coming from the left speaker HPG and in which are present the audio contents relating to the main program and the auxiliary program, a zone ZPRX resulting from speaker right HPD and in which are also present the audio content of the main program and the auxiliary program, and a ZSP zone in which are located viewers AUDT1 and AUDT2.
  • the audio content relating to the auxiliary program PRX is not audible by the viewer AUDT1, and consequently this one does not perceive as audio content related to the main program.
  • the viewer AUDT2 does not perceive the audio content relating to the main program and only perceives the audio content relating to the auxiliary program PRX.
  • FIGS. 8 and 9 schematically illustrate an application of the invention to a video game.
  • the device DISP is preferentially incorporated in a game console.
  • the device DISP comprises generation means GS1 capable of delivering an audio content intended for the player PL1 ( figure 9 ).
  • GS2 generation means deliver audio content for the PL2 player.
  • the device DISP comprises a preprocessing block MPTR1 and a preprocessing block MPTR2 respectively delivering the first and fourth audio contents CAD1 and CAD4 to a stage CCN similar to that illustrated on FIG. figure 6 .
  • the DISP device of the figure 8 comprises means GAM capable of generating additional audio content, for example, a background ambient sound. All audio contents are stereo-mixed in a MIX mixer and converted to a DAC digital-to-analog converter before being amplified in an AMP amplifier and broadcast on the HPG and HPD speakers.
  • HPG and HPD loudspeakers have three zones, ZPL1, ZPL2 and ZSP.
  • zones ZPL1 and ZPL2 the set of audio contents is audible.
  • the ZSP zone is a zone of acoustic suppression of certain audio contents.
  • the player will only perceive the background and the sound that is intended for him.
  • the player will also perceive the sound of the atmosphere and the sound that is intended for him.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • General Health & Medical Sciences (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP10160535A 2009-04-28 2010-04-21 Procédé et dispositif de contrôle de la diffusion de contenus audio par deux haut-parleurs Withdrawn EP2247122A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0952782A FR2944939B1 (fr) 2009-04-28 2009-04-28 Procede et dispositif de controle de la diffusion de contenus audio par deux haut-parleurs.

Publications (1)

Publication Number Publication Date
EP2247122A1 true EP2247122A1 (fr) 2010-11-03

Family

ID=41217664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10160535A Withdrawn EP2247122A1 (fr) 2009-04-28 2010-04-21 Procédé et dispositif de contrôle de la diffusion de contenus audio par deux haut-parleurs

Country Status (4)

Country Link
US (2) US8331571B2 (zh)
EP (1) EP2247122A1 (zh)
CN (1) CN101877806B (zh)
FR (1) FR2944939B1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2944939B1 (fr) * 2009-04-28 2011-05-27 St Microelectronics Grenoble 2 Procede et dispositif de controle de la diffusion de contenus audio par deux haut-parleurs.
US20120038827A1 (en) * 2010-08-11 2012-02-16 Charles Davis System and methods for dual view viewing with targeted sound projection
US9210525B2 (en) * 2011-12-27 2015-12-08 Panasonic Intellectual Property Management Co., Ltd. Sound field control apparatus and sound field control method
US9782672B2 (en) * 2014-09-12 2017-10-10 Voyetra Turtle Beach, Inc. Gaming headset with enhanced off-screen awareness
CN109963232A (zh) * 2017-12-25 2019-07-02 宏碁股份有限公司 音频信号播放装置及对应的音频信号处理方法
CN110139151A (zh) 2019-05-23 2019-08-16 青岛海信传媒网络技术有限公司 音频数据的处理方法及电子设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1699259A1 (en) * 2003-12-25 2006-09-06 Yamaha Corporation Audio output apparatus
JP2008011253A (ja) * 2006-06-29 2008-01-17 Toshiba Corp 放送受信装置
EP1921890A2 (en) * 2003-02-24 2008-05-14 1...Limited Sound beam loudspeaker system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0405346D0 (en) * 2004-03-08 2004-04-21 1 Ltd Method of creating a sound field
FR2944939B1 (fr) * 2009-04-28 2011-05-27 St Microelectronics Grenoble 2 Procede et dispositif de controle de la diffusion de contenus audio par deux haut-parleurs.
WO2011044064A1 (en) * 2009-10-05 2011-04-14 Harman International Industries, Incorporated System for spatial extraction of audio signals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1921890A2 (en) * 2003-02-24 2008-05-14 1...Limited Sound beam loudspeaker system
EP1699259A1 (en) * 2003-12-25 2006-09-06 Yamaha Corporation Audio output apparatus
JP2008011253A (ja) * 2006-06-29 2008-01-17 Toshiba Corp 放送受信装置

Also Published As

Publication number Publication date
US8331571B2 (en) 2012-12-11
US20100272292A1 (en) 2010-10-28
US9294207B2 (en) 2016-03-22
CN101877806A (zh) 2010-11-03
CN101877806B (zh) 2014-11-19
US20130094652A1 (en) 2013-04-18
FR2944939A1 (fr) 2010-10-29
FR2944939B1 (fr) 2011-05-27

Similar Documents

Publication Publication Date Title
KR100626233B1 (ko) 스테레오 확장 네트워크에서의 출력의 등화
CN113660581B (zh) 用于处理输入音频信号的系统和方法以及计算机可读介质
EP2247122A1 (fr) Procédé et dispositif de contrôle de la diffusion de contenus audio par deux haut-parleurs
US6928168B2 (en) Transparent stereo widening algorithm for loudspeakers
US20130322636A1 (en) Diffusing Acoustical Crosstalk
CN111418220B (zh) 串扰处理b链
EP1886535B1 (fr) Procede pour produire une pluralite de signaux temporels
EP1558056A1 (fr) Système acoustique pour véhicule et dispositif correspondant
TW200932028A (en) Crosstalk cancellation for closely spaced speakers
US7702111B2 (en) Audio stereo processing method, device and system
US20030076972A1 (en) Sound field correction circuit
EP1133192B1 (en) Dual-bar audio level meter for digital audio with dynamic range control
JP2010212898A (ja) 音声信号処理装置及びテレビジョン受像機
JP2002291100A (ja) オーディオ信号再生方法、及びパッケージメディア
EP3711307A1 (fr) Procede de sonorisation live, au casque, tenant compte des caracteristiques de perception auditive de l'auditeur.
EP3864859B1 (fr) Système acoustique à effet spatial
EP3701730A1 (fr) Arrangement spatial de dispositifs de diffusion sonore
EP4203486A1 (fr) Boitier decodeur pour la restitution d'une piste audio additionnelle
FR2677839A1 (fr) Procede et dispositif pour systeme stereophonique de reproduction du son.
CN117652161A (zh) 用于回放沉浸式音频的音频处理方法
WO2008132404A2 (fr) Systèmes de sonorisation et de diffusion vidéo
FR2548491A1 (fr) Procede et dispositif de production d'effet spatial pour l'ecoute d'emissions ou d'enregistrements monophoniques
KR20050008176A (ko) 차량용 오디오의 음향 밸런스 조절 장치
FR2595529A1 (fr) Synthetiseur simulateur de stereophonie

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 20100421

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): 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 SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA ME RS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110503