EP1372356B1 - Verfahren zur Wiedergabe von mehreren unabhängigen Signalen, insbesondere an einem Fahrzeug - Google Patents
Verfahren zur Wiedergabe von mehreren unabhängigen Signalen, insbesondere an einem Fahrzeug Download PDFInfo
- Publication number
- EP1372356B1 EP1372356B1 EP02013455A EP02013455A EP1372356B1 EP 1372356 B1 EP1372356 B1 EP 1372356B1 EP 02013455 A EP02013455 A EP 02013455A EP 02013455 A EP02013455 A EP 02013455A EP 1372356 B1 EP1372356 B1 EP 1372356B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sound signals
- sound
- loudspeakers
- reproducing
- seats
- 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.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
- H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
Definitions
- the invention relates to a method for reproducing a plurality of mutually unrelated sound signals by means of a plurality of loudspeakers and to a sound reproducing system for applying this method.
- JP08289389 discloses a acoustic system for use in a vehicle in which each seat is provided with one or more loudspeakers. Each person in the car can select a sound signal from a plurality of sound sources independent from the selection made by the other persons. By means of a signal matrix switch the selected sound signal is supplied to the loudspeaker(s) closest to the person making the selection. In such a situation it may easily occur that a person in one seat is bothered by the sound signal reproduced by the loudspeakers associated with another seat.
- the on-vehicle acoustic device of JP09171387 provides a masking means which outputs noise from a speaker to mask the sound signals reproduced by the loudspeakers of other seats.
- a method for reproducing a plurality of mutually unrelated sound signals by means of a plurality of loudspeakers comprising:
- Crosstalk cancellation filters are known per se, for example from M.I.T. Media Laboratory Perceptual Computing Section Technical Report No. 342, July 6, 1995, Transaural 3-D audio, by William G. Gardner.
- a 3-D audio system is disclosed in which a stereo sound signal is first processed by a binaural spatializer. The output of the spatializer is thereafter fed to a transaural audio system which delivers binaural signals to the ears of a person using a pair of stereo loudspeakers.
- the transaural audio system includes a crosstalk cancelation filter for canceling the crosstalk leakage from each loudspeaker to the opposite ear. This report does not address the problem of crosstalk between mutually unrelated sound signals which are reproduced for different people.
- the sound signals comprise multichannel sound signals and the method comprises the additional step of filtering the multichannel sound signals in the crosstalk cancellation filter in order to cancel out cross talk between the individual channels of the multichannel sound signals, the filtered multichannel sound signals being supplied to the loudspeakers.
- the operation of the crosstalk cancellation filter is in this respect similar to the operation of the crosstalk cancelation filter as used in the 3-D audio system of Gardner. The crosstalk leakage from each channel to the other channel(s) is thereby effectively eliminated.
- the multichannel sound signals are stereo sound signals for reproduction by a pair of stereo loudspeakers.
- the method comprises the further steps of processing the stereo sound signals in a binaural spatializer and of filtering the binaurally spatialized stereo sound signals in the crosstalk cancellation filter.
- the loudspeakers are provided on or above a plurality of seats or chairs.
- the loudspeakers are provided on the top of the backs of the seats or chairs.
- the loudspeakers are provided on headrests of the seats or chairs.
- the loudspeakers may be provided above the seats or chairs, e.g. on the ceiling above the seats or chairs.
- the seats or chairs are comprised in a car or in a space for presenting multi-media shows such as motion pictures.
- the invention also relates to a sound reproducing system, for applying the method of anyone of the preceding claims, comprising sound processing means and coupled thereto loudspeakers, the sound processing means being arranged for receiving a plurality of sound signals from one or more sound sources, the sound processing means comprising a crosstalk cancellation filter for filtering the received sound signals in order to cancel out crosstalk between the individual sound signals, the sound processing means being further arranged for supplying the filtered sound signals to the loudspeakers.
- the sound signals comprise multichannel sound signals and the crosstalk cancellation filter is arranged for filtering the multichannel sound signals in order to cancel out cross talk between the individual channels of the multichannel sound signals, the sound processing means being further arranged for supplying the filtered multichannel sound signals to the loudspeakers.
- the multichannel sound signals may be stereo sound signals for reproduction by a pair of stereo loudspeakers.
- the sound processing means may comprise a binaural spatializer for processing the stereo sound signals and for supplying the binaurally spatialized sound signals to the crosstalk cancellation filter.
- the loudspeakers are provided on or above a plurality of seats or chairs, e.g. on the top of the backs of the seats or chairs or on headrests of the seats or chairs.
- the loudspeakers may be provided above the seats or chairs, e.g. on the ceiling above the seats or chairs.
- the seats or chairs may be comprised in a car or in a space for presenting multi-media shows such as motion pictures.
- the sole Figure shows schematically an embodiment of a sound reproducing system according to the invention.
- the sound reproducing system comprises sound processing means 10 and coupled thereto loudspeakers 12, 14.
- the sound processing means 10 are arranged for receiving a plurality of sound signals 26, 28 from one or more sound sources (not shown).
- the sound signals 26, 28 are stereo sound signals
- the loudspeakers 12, 14 are stereo loudspeakers for reproducing the stereo sound signals.
- the sound reproducing system may equally well be used with other multichannel or single channel sound signals with corresponding loudspeaker arrangements.
- the sound processing means 10 comprises two binaural spatializers 18, 20 and a crosstalk cancellation filter 16.
- the binaural spatializers 18, 20 are arranged for processing the stereo sound signals 26, 28 and for supplying the resulting binaurally spatialized sound signals 30, 32 to the crosstalk cancellation filter 16.
- the crosstalk cancellation filter 16 is arranged for filtering the binaurally spatialized sound signals 30, 32 in order to cancel out crosstalk between the individual sound signals 30, 32 and between the individual channels of the multichannel sound signals. In the Figure this filtering is shown in detail for the left channel of the stereo sound signal 26 and the therewith corresponding left channel of the binaurally spatialized stereo sound signal 30.
- the crosstalk between this channel and each of the four channels of the stereo sound signals 30 and 32 is canceled by means of a specific crosstalk cancellation unit: for instance the crosstalk between the left channel of sound signal 30 (AL) and the right channel of sound signal 32 (BR) is cancelled by means of a specific crosstalk cancellation unit BR-AL.
- the output signals of the four specific crosstalk cancellation units are combined in an adder 22 and the combined signal, from which the crosstalk is substantially removed, is finally supplied to the speaker 12 (Speaker AL).
- the crosstalk cancellation for the other channels AR, BL and BR is not shown in detail in the Figure but is similar in operation to the crosstalk cancellation for the AL channel.
- For each of these other channels AR, BL and BR four specific crosstalk cancellation units and an adder 22 are provided.
- the filtered stereo sound signals are supplied to the loudspeakers 12 and 14.
- the loudspeakers 12 are the left loudspeakers reproducing the left channel of the stereo sound signals and the loudspeakers 14 are the right loudspeakers reproducing the right channel of the stereo sound signals.
- Crosstalk cancellation filters and binaural spatializers are known per se, for example from M.I.T. Media Laboratory Perceptual Computing Section Technical Report No. 342, July 6, 1995, Transaural 3-D audio, by William G. Gardner.
- the sound processing means 10 does not comprise the binaural spatializers 18 and 20 in which case the sound signals 26, 28 are directly supplied to the crosstalk cancellation filter 16.
- the loudspeakers 12, 14 may be provided on or above a plurality of seats or chairs (not shown).
- the loudspeakers 12, 14 may be provided on the top of the backs of the seats or chairs or on headrests of the seats or chairs.
- the loudspeakers 12, 14 may be mounted on a ceiling above the seats or chairs.
- the seats or chairs are preferably comprised in a car, in which situation application of the invention allows the passengers of the car to listen to different sound signals without having to wear headphones and without substantial interference of the different sound signals.
- the seats or chairs may also be comprised in a space for presenting multi-media shows, such as a cinema in which motion pictures are shown, in which situation application of the invention may allow members of the audience to listen to different language versions of the sound signals without having to wear headphones and without substantial interference of the different sound signals.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Claims (14)
- Verfahren zur Wiedergabe mehrerer nicht miteinander in Beziehung stehender Tonsignale (26, 28) mittels mehrerer Lautsprecher, mit den folgenden Schritten:- Empfangen der Tonsignale (26, 28) von einer oder mehreren Tonquellen;- Filtern der empfangenen Tonsignale in einem Übersprech-Löschfilter (16), um Übersprechen zwischen den Tonsignalen (26, 28) auszulöschen;- Leiten der gefilterten Tonsignale zu den Lautsprechern (14), wobei jedes Tonsignal der mehreren Tonsignale (26, 28) ein individuelle Kanäle umfassendes Mehrkanal-Tonsignal ist und wobei das Verfahren den zusätzlichen Schritt des Filterns der Mehrkanal-Tonsignale in dem Übersprech-Löschfilter (16) umfasst, um Übersprechen zwischen den individuellen Kanälen der Mehrkanal-Tonsignale auszulöschen.
- Verfahren zur Wiedergabe mehrerer nicht miteinander in Beziehung stehender Tonsignale nach Anspruch 1, dadurch gekennzeichnet, dass die Mehrkanal-Tonsignale Stereo-Tonsignale zur wiedergabe durch ein Stereo-lautsprecherpaar sind.
- Verfahren zur Wiedergabe inehrerer nicht miteinander in Beziehung stehender Tonsignale nach Anspruch 2, dadurch gekennzeichnet, dass das Verfahren die folgenden weiteren Schritte umfasst: Verarbeiten der Stereo-Tonsignale in einem binauralen Spatialisierer (18, 20) und Filtern der binaural spatialisierten Stereo-Tonsignale in dem Übersprech-Löschfilter (16).
- Verfahren zur Wiedergabe mehrerer nicht miteinander in Beziehung stehender Tonsignale nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lautsprecher (12, 14) an oder über mehreren Sitzen oder Stühlen vorgesehen werden.
- Verfahren zur Wiedergabe mehrerer nicht miteinander in Beziehung stehender Tonsignale nach Anspruch 4, dadurch gekennzeichnet, dass die Lautsprecher (12, 14) an dem oberen Teil der Rückenlehnen der Sitze oder Stühle vorgesehen werden.
- Verfahren zur Wiedergabe mehrerer nicht miteinander in Beziehung stehender Tonsignale nach Anspruch 4, dadurch gekennzeichnet, dass die Lautsprecher (12, 14) an Kopfstützen der Sitze oder Stühle vorgesehen werden.
- Verfahren zur Wiedergabe mehrerer nicht miteinander in Beziehung stehender Tonsignale nach einem der Ansprüche 4-6, dadurch gekennzeichnet, dass die Sitze oder Stühle in einem Auto enthalten sind.
- Tonwiedergabesystem zur Anwendung des Verfahrens nach einem der vorhergehenden Ansprüche mit Tonverarbeitungsmitteln und mit diesen gekoppelten Lautsprechern (12, 14), dadurch gekennzeichnet, dass die Tonverarbeitungsmittel dafür ausgelegt sind, mehrere Tonsignale von einer oder mehreren Tonquellen zu empfangen, wobei die Tonverarbeitungsmittel ein Übersprech-Löschfilter (16) zum Filtern der empfangenen Tonsignale umfassen, um Übersprechen zwischen den Tonsignalen auszulöschen, wobei die Tonverarbeitungsmittel ferner dafür ausgelegt sind, die gefilterten Tonsignale zu den Lautsprechern (12, 14) zu leiten, wobei jedes Tonsignal ein individuelle Kanäle umfassendes Mehrkanal-Tonsignal ist und wobei das Übersprech-Löschfilter (16) dafür ausgelegt ist, die Mehrkanal-Tonsignale zu filtern, um Übersprechen zwischen den individuellen Kanälen der Mehrkanal-Tonsignale auszulöschen.
- Tonwiedergabesystem nach Anspruch 8, dadurch gekennzeichnet, dass die Mehrkanal-Tonsignale Stereo-Tonsignale zur Wiedergabe durch ein Stereo-Lautsprecherpaar (12, 14) sind.
- Tonwiedergabesystem nach Anspruch 9, dadurch gekennzeichnet, dass die Tonverarbeitungsmittel einen binauralen Spatialisierer (18, 20) zum Verarbeiten der Stereo-Tonsignale und zum Leiten der binaural spatialisierten Stereo-Tonsignale zu dem Übersprech-Löschfilter (16) umfassen.
- Tonwiedergabesystem nach einem der Ansprüche 8-10, dadurch gekennzeichnet, dass die Lautsprecher an oder über mehreren Sitzen oder Stühlen vorgesehen sind.
- Tonwiedergabesystem nach Anspruch 11, dadurch gekennzeichnet, dass die Lautsprecher (12, 14) an dem oberen Teil der Rückenlehnen der Sitze oder Stühle vorgesehen sind.
- Tonwiedergabesystem nach Anspruch 11, dadurch gekennzeichnet, dass die Lautsprecher (12, 14) an Kopfstützen der Sitze oder Stühle vorgesehen sind.
- Tonwiedergabesystem nach einem der Ansprüche 11-13, dadurch gekennzeichnet, dass die Sitze oder Stühle in einem Auto enthalten sind.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60233309T DE60233309D1 (de) | 2002-06-13 | 2002-06-13 | Verfahren zur Wiedergabe von mehreren unabhängigen Signalen, insbesondere an einem Fahrzeug |
EP02013455A EP1372356B1 (de) | 2002-06-13 | 2002-06-13 | Verfahren zur Wiedergabe von mehreren unabhängigen Signalen, insbesondere an einem Fahrzeug |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02013455A EP1372356B1 (de) | 2002-06-13 | 2002-06-13 | Verfahren zur Wiedergabe von mehreren unabhängigen Signalen, insbesondere an einem Fahrzeug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1372356A1 EP1372356A1 (de) | 2003-12-17 |
EP1372356B1 true EP1372356B1 (de) | 2009-08-12 |
Family
ID=29558344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02013455A Expired - Fee Related EP1372356B1 (de) | 2002-06-13 | 2002-06-13 | Verfahren zur Wiedergabe von mehreren unabhängigen Signalen, insbesondere an einem Fahrzeug |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1372356B1 (de) |
DE (1) | DE60233309D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9088842B2 (en) | 2013-03-13 | 2015-07-21 | Bose Corporation | Grille for electroacoustic transducer |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9100748B2 (en) * | 2007-05-04 | 2015-08-04 | Bose Corporation | System and method for directionally radiating sound |
EP2389016B1 (de) * | 2010-05-18 | 2013-07-10 | Harman Becker Automotive Systems GmbH | Individualisierung von Tonsignalen |
US20150036827A1 (en) * | 2012-02-13 | 2015-02-05 | Franck Rosset | Transaural Synthesis Method for Sound Spatialization |
US10321252B2 (en) | 2012-02-13 | 2019-06-11 | Axd Technologies, Llc | Transaural synthesis method for sound spatialization |
US9327628B2 (en) | 2013-05-31 | 2016-05-03 | Bose Corporation | Automobile headrest |
US9699537B2 (en) | 2014-01-14 | 2017-07-04 | Bose Corporation | Vehicle headrest with speakers |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0537994A (ja) * | 1991-08-02 | 1993-02-12 | Nippon Telegr & Teleph Corp <Ntt> | 音声再生装置 |
US20020038158A1 (en) * | 2000-09-26 | 2002-03-28 | Hiroyuki Hashimoto | Signal processing apparatus |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6009178A (en) * | 1996-09-16 | 1999-12-28 | Aureal Semiconductor, Inc. | Method and apparatus for crosstalk cancellation |
US6243476B1 (en) * | 1997-06-18 | 2001-06-05 | Massachusetts Institute Of Technology | Method and apparatus for producing binaural audio for a moving listener |
US6442277B1 (en) * | 1998-12-22 | 2002-08-27 | Texas Instruments Incorporated | Method and apparatus for loudspeaker presentation for positional 3D sound |
-
2002
- 2002-06-13 EP EP02013455A patent/EP1372356B1/de not_active Expired - Fee Related
- 2002-06-13 DE DE60233309T patent/DE60233309D1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0537994A (ja) * | 1991-08-02 | 1993-02-12 | Nippon Telegr & Teleph Corp <Ntt> | 音声再生装置 |
US20020038158A1 (en) * | 2000-09-26 | 2002-03-28 | Hiroyuki Hashimoto | Signal processing apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9088842B2 (en) | 2013-03-13 | 2015-07-21 | Bose Corporation | Grille for electroacoustic transducer |
Also Published As
Publication number | Publication date |
---|---|
DE60233309D1 (de) | 2009-09-24 |
EP1372356A1 (de) | 2003-12-17 |
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