EP1880577A1 - Vorrichtung und verfahren zum erzeugen eines lautsprechersignals aufgrund einer zufällig auftretenden audioquelle - Google Patents
Vorrichtung und verfahren zum erzeugen eines lautsprechersignals aufgrund einer zufällig auftretenden audioquelleInfo
- Publication number
- EP1880577A1 EP1880577A1 EP06754040A EP06754040A EP1880577A1 EP 1880577 A1 EP1880577 A1 EP 1880577A1 EP 06754040 A EP06754040 A EP 06754040A EP 06754040 A EP06754040 A EP 06754040A EP 1880577 A1 EP1880577 A1 EP 1880577A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impulse response
- loudspeaker
- generator
- audio
- positions
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/13—Application of wave-field synthesis in stereophonic audio systems
Definitions
- the present invention relates to audio signal processing, and more particularly to audio signal processing in systems having a plurality of loud speakers, such as wave field synthesis systems.
- Fig. 4 shows a typical wave field synthesis scenario.
- the heart of the wave field synthesis system is the wave field synthesis renderer 400, which generates its own loudspeaker signal for each of the individual loudspeakers 401, which group around a reproduction environment. More specifically, between the wave field synthesis renderer 400 and each speaker, there is thus a speaker channel on which the speaker signal for that speaker is transmitted from the wave field synthesis renderer 400.
- the wave field synthesis renderer 400 is supplied with control data, which is typically arranged in a control file 402.
- the control file may comprise a list of audio objects, each audio object having a virtual position and an audio signal associated therewith.
- the virtual position is the location that a listener in the playback environment will locate.
- a film screen is arranged, it is not only an optical spatial scenario but also a tonal spatial scenario generated for the viewer.
- all loudspeaker channels are supplied with loudspeaker signals which are produced by the same audio signal for a source, such as an actor or z. As an approaching train derived. All these speaker signals differ but more or less by their scaling and their delay of the input signal.
- the scaling and delay for each loudspeaker signal is generated by the Wave Field Synthesis Algorithm, which operates on the Hugy's principle. As is known, the principle is based on being able to generate any arbitrary waveform through a large number of spherical waves.
- the wave-field synthesis renderer will perform the procedure described above for each individual audio object and then accumulate the individual before the loudspeaker signals are transmitted to the individual loudspeakers via the loudspeaker channels Perform component signals. For example, when viewing the speaker 403 located at a particular speaker position that is known, the wave field synthesis renderer will generate for each audio object a component signal to be played by the speaker 403. Then, when all the component signals are calculated for a timing for the speaker 403, the individual component signals are simply added up to obtain the combined component signal for the speaker channel going from the wave field synthesis renderer 400 to the speaker 403. If, on the other hand, only one source is active for the loudspeaker 403 at a time, the summation can of course be omitted.
- the wave-field synthesis renderer 400 has practical limitations. So, given the facts The fact that the whole wave field synthesis concept is in any case relatively computationally intensive can only process a certain number of individual sources at the same time.
- a typical maximum number of sources to be processed simultaneously is 32 sources. This number of 32 sources is sufficient for typical scenes, such as dialogues. However, this number is much too small when certain events occur, such as a rainy sound that is made up of a very large number of different different sound events.
- a single sound event is the sound that a raindrop produces when it falls on a particular surface.
- a disadvantage of this concept is that even there particle positions can not be generated, but only directions with respect to a listener can be used by stereo panning between two loudspeakers adjacent to the impact position of the droplet. Again, no optimal rain sound is generated for the listener.
- the object of the present invention is to provide a concept for generating a loudspeaker signal which enables a higher quality reproduction of an audio source to be presented at different positions at different times in an audio scene.
- the present invention is based on the finding that both the position and the time at which an audio source should occur in an audio scene can be generated synthetically.
- a single impulse response is generated for each position.
- the single-pulse response represents the image of the audio source, which is located at a certain position, to a loudspeaker or a loudspeaker signal.
- the individual generated individual impulse response information are combined in the correct time, that is, depending on the time of occurrence associated with the onset positions, to obtain combination impulse response information for a loudspeaker channel.
- the audio signal describing the audio source is then filtered using the combination impulse response information to finally obtain the speaker signal for the speaker channel, this speaker signal representing the audio source.
- the loudspeaker channel loudspeaker signal represents the total signal that exists due to the audio signal that has occurred at various times in which the individual events of the occurrence of the raindrop in the reproduction room are uniquely located by determined virtual positions.
- spatially distributed particles can be reproduced in a high repetition rate and in real time for large spaces.
- sound sources can occur simultaneously at different points in the room and simulated simultaneously.
- a high number of input channels is required according to the invention, since the signals are generated due to the individual sources within the wave field synthesis renderer.
- a single audio object which comprises the raindrop audio signal is sufficient.
- the number of more or less simultaneously occurring raindrops arranged at different virtual positions manifests itself only how many individual impulse responses are generated and combined.
- the concept according to the invention leads to a considerable reduction in the computation time in comparison with the case in which a separate virtual source is created on a separate virtual source for each audio object - len position z. B. is provided via a control file a wave field synthesis renderer. Due to the summary of the individual impulse responses according to the invention, an arbitrarily high number of raindrops at different positions does not lead to a correspondingly large number of convolutions, but only results in a single convolution of a (large) impulse response with the audio signal representing the audio source (the raindrop) , This too is one reason why the concept according to the invention can be carried out very computationally efficiently.
- any primary sound source is reproduced as often as desired virtually via wave field synthesis over an arbitrarily large listening surface.
- the required computing power is many times lower than with current field-of-field synthesis algorithms.
- a generation of parameters such as mean particle density per time, two-dimensional position in space, three-dimensional position in space, individual filtering of each particle by means of impulse response is performed by means of a random number generator.
- the concept according to the invention can also be used favorably for X.Y multichannel surround format.
- the raindrop falls on a piece of wood or on a sheet of metal, which of course results in different noises.
- FIG. 2a shows a schematic representation of three different impulse responses for the audio source at different positions and different points in time
- 2b shows a schematic representation of the individual impulse responses arranged with respect to the delays and of a combined impulse response generated by summation
- FIG. 2c is a schematic illustration of the filtering of the audio signal for the audio source using a filter represented by the combined impulse response to obtain the loudspeaker signal for a loudspeaker channel;
- FIG. 3 shows a block diagram of the device according to the invention according to a preferred embodiment of the present invention.
- FIG. 4 is a schematic block diagram of a typical field-synthesis scenario.
- Fig. 1 shows an overview diagram of a device according to the invention for generating a loudspeaker signal at an output 10 for a loudspeaker channel, which is associated with a loudspeaker (such as 403), which in a Playback environment is attachable to a speaker position of a plurality of speaker positions.
- the preferred embodiment of the inventive apparatus shown in FIG. 1 includes means 12 for providing an audio signal for an audio source to occur at various locations and at different times in an audio scene.
- the means for providing the audio signal is typically a storage medium on which an audio signal, e.g. As an incident raindrop or a sound of another particle, such as an approaching or departing spaceship z.
- this audio signal for the audio source is once preferably permanently stored within the wave field synthesis renderer, such as a renderer 400 of FIG. 4, and therefore need not be supplied via the control file.
- the audio signal can also be fed to the renderer via the control file.
- the means 12 for providing the audio signal would be a control file together with associated readout / transmission means.
- the device according to the invention further comprises a position generator for providing a plurality of positions at which the audio source is to occur.
- the position generator 14 is configured to, when viewing FIG. 4, generate virtual positions that may be within or outside the playback environment. Assuming that at the top of the playback environment in Fig. 4 z. For example, if there is a screen on which a movie is projected, the virtual positions may of course also be behind the screen or in front of the screen.
- the position generator 14 may be designed to hold arbitrary (x, y) positions within o to deliver the outside of the playback environment.
- a z-position component can also be generated, that is to say whether the listener is to locate a source above or, if appropriate, even below itself.
- the position generator is configured to provide arbitrary positions in the replay environment or outside the replay environment, or only positions in a particular screen, depending on the implementation of a single impulse response generator 16 described below. The generation of positions only within a certain raster is advantageous when a look-up table is used in the individual impulse response generator 16 which will be described below in order to generate at least a part or the complete single-impulse response.
- a position rounding to the raster can take place either at the output of the position generator 14 or at the input of the individual impulse response generator 16.
- arbitrary finely resolved positions can be processed by the single impulse response generator to calculate the single impulse responses without further position rounding / quantization.
- the position generator 14 receives area information or volume information for the three-dimensional case, which indicate in which area positions are to be generated. In other words, the surface information defines an area perpendicular to the canvas, within which rain should fall.
- the position generator 14 would be controlled by the area information to generate virtual positions x, y only in the front half where it is supposed to rain.
- the device further comprises a time generator 18 for providing times of occurrence at which the audio source should occur, wherein a time assigned to a position generated by the position generator 14.
- a time generator 18 for providing times of occurrence at which the audio source should occur, wherein a time assigned to a position generated by the position generator 14.
- the time generator 18 is controlled by a density parameter, which, just like the area information for the position generator 14, is supplied by a parameter controller 19.
- the time generator 18 thus receives as parameter the time density, ie the number of occurrence events of the audio source per time interval.
- the time density for a time interval of, for example, 10 seconds controls how many raindrops, for example, 1,000 raindrops, should occur per second.
- the time generator 18 is designed to deliver within such a time interval the time points Ti predetermined by the time density. As shown by a dashed line 17, it is also preferable to supply the time density information not only the timing generator 18 but also the position generator 14, so that the position generator always sitions the required amount of Po ⁇ "eject", which then by the However, it is not absolutely necessary that the density information be supplied to the position generator, which is unnecessary if the position generator is sufficiently fast Positions ejects and caches these positions so that they are supplied to the single impulse response generator 16 as needed, ie in association with time points or controlled by the temporal density information.
- the single-pulse response generator 16 is configured to generate single-pulse response information for each position of the plurality of speaker channel locations.
- the single-pulse response generator operates based on position and based on information about the speaker channel that is involved.
- the loudspeaker signal for the left lower loudspeaker of the scenario in Fig. 4 will look different from the upper right loudspeaker of the scenario in Fig. 4.
- the single-pulse response generator 16 will also be configured to account for the position information generated by the position generator.
- the single impulse response generator will compute and express as "impulse response" a particular loudspeaker of the many loudspeakers that determine the replay environment of Fig. 4, such that when all loudspeakers "play" simultaneously, a user has the impression in that a raindrop at the position x, y, which has been generated by the position generator, has hit a certain surface.
- the apparatus according to the invention further comprises a pulse response combiner for combining the single-pulse response information according to the times of occurrence to obtain combination-impulse response information for the speaker channel.
- the Impulsantwortkombinierer is designed to ensure that many occurrences of the audio source ⁇ have occurred, and that these are the correct time, namely bined controlled by the time information with each other com-.
- the preferred type of combination is an addition. However, weighted additions / subtractions can also be performed if certain effects are to be achieved. However, a preferred simple addition of the individual impulse responses IAi, taking into account the times of occurrence generated by the time generator 18.
- the combination impulse response information generated by the impulse response combiner 20 is supplied to a filter (or filter device) 21 as well as the audio signal at the output of the device 12.
- the filter 21 is a filter with adjustable impulse response, so with adjustable filter characteristic. While the audio signal at the output of the device 12 will typically be short, the combined impulse response output by the impulse response combiner 20 will be relatively long and vary widely. In principle, the combined impulse response can be arbitrarily long, depending on how long the effect generator is running. For example, if it runs for 30 minutes for a rain that lasts 30 minutes, then the length of the combined impulse response will also be of this order of magnitude.
- the loudspeaker signal is obtained which, depending on the audio scene, is already the actual loudspeaker signal played by the loudspeaker, or which, if additional audio objects are reproduced by this loudspeaker, is a loudspeaker signal which can be reproduced with is added to a different loudspeaker signal for this loudspeaker to produce an overall loudspeaker signal, as will be explained later with reference to FIG.
- the filter 21 is therefore formed exclusively to the audio signal using the combination of filtering tions pulse response information to obtain the speaker signal for the speaker channel, the NEN the occurrence of the audio source to the various positio ⁇ and at different times for specific speaker channel represents.
- FIG. 2a Three individual impulse response information IA1, IA2, IA3 are shown in FIG. 2a.
- Each of the three impulse responses additionally has a certain delay, ie a time lag or "memory", which the channel described by this impulse response has Delay of the first impulse response IAl is 1, while the delays of the second and third 2 and 3.
- Fig. 2b the three impulse responses are shifted in time, taking into account their individual delays, and it can be seen that the impulse response IA3 is delayed by two delay pulses.
- Fig. 2b the example shown in Fig.
- the temporally correctly arranged single impulse responses are summed to obtain the result, ie the combination impulse response information.
- values of the individual impulse responses located at the same time are added together and, if appropriate, subjected to a weighting factor before the addition or after the addition.
- FIGS. 2a and 2b are only schematic.
- the correct timing arrangement does not necessarily have to be executed directly in a processor's register memory before the summation occurs. Instead, it is preferable to subject the individual impulse responses immediately prior to the addition to temporal shift operations according to the delays and the required times of occurrence.
- Fig. 2c shows the operation performed by the adjustable impulse response filter 21.
- the combined impulse response in the uppermost field of Fig. 2c is convolved with the audio signal in the middle field of Fig. 2c to finally obtain the loudspeaker signal for a loudspeaker channel.
- the convolution can take place either directly in the time domain as convolution.
- both the impulse response and the audio signal may be transformed into the frequency domain such that the convolution results in a multiplication of the frequency domain representation of the audio signal and the frequency domain representation of the combined impulse response, which is now the transfer function.
- the parameter control 19 is configured to To provide area information as a concrete area preferably in rectangular form.
- a length 1 and a width b of a surface and a center M of this surface are provided. This can be used to indicate the area in the playback room, which raindrops should fall on, for example, so that either the entire playback room or only part of the playback environment is "rained" with rain
- a particulate filter control signal F is supplied which is used in the block of position dependent filtering described later to produce a decorrelation between the raindrops, resulting in that the overall impression does not become synthetic. But realistically, especially since of course not all raindrops sound the same but differ within certain limits with respect to their sound, but according to the invention only one particle audio signal is provided for a certain period of time Differences in sound occur.
- surface properties E are still supplied by the parameter control 19, which are likewise used in the position-dependent filtering in order, for. B. to signal that a raindrop falls on a wooden surface, on a metal surface or on a water surface, so on matter with different properties.
- the random number generator 14 corresponds to the position generator 14 of FIG. 1, and preferably comprises as well as the time ⁇ controller 18 a real or pseudo-random generator to generate both the individual positions as well as the individual time points controlled by the surface parameters and the density parameter. Is dependent of a x generated by the event generator to ⁇ position, in which y in Fig. 3 of the preferred embodiment of the present invention has gone into a wave field synthesis parameter database.
- a wave field synthesis parameter database an input value, namely position x, y, is assigned a set of single-pulse response information, each single-pulse response information of that set of single-pulse response information being provided to a speaker channel.
- This pair of scale and delay represents the simplest form of single-pulse response information provided by the single-pulse response generator 16.
- the impulse response represented by scale and delay has only a single value, namely at the time given by delay, and with an amplitude given by scale.
- a further table in the block in addition to the access to the wave field synthesis parameter database 16a.
- a "right" impulse response is output with more than one value that can model the tone color of the drop, so that a drop falling on a tin roof will have a different impulse response (IR) in block 16b get as a drop, which falls due to its position not on a tin roof but, for example, on a water surface.
- the block "position-dependent filtering" 16b is thus a set of N filter impulse responses (Filter IR) output, again for each of the individual speakers.
- a multiplication block 16c one multiplication then takes place per loudspeaker channel.
- the impulse response represented by scale and delay is multiplied by the filter impulse response generated for the same loudspeaker channel in block 16b.
- this multiplication has been performed for each of the N loudspeaker channels, one obtains a set of N single-pulse responses for each particle position, so for each raindrop, as shown in a block 16d.
- a further or combined impulse response may be provided by which the sound of a raindrop is always slightly modified depending on the position but randomly generated. This ensures that not all raindrops that fall on a tin roof sound exactly the same, but that each or at least some of the raindrops sound different, in order to be more just to nature, in which all raindrops are not identical (but similar) listen.
- the wave field synthesis algorithm results in low-pass filtering that can be perceived by a listener. It is therefore preferred to perform a predistortion in the filter impulse response in such a way that a preference of the high frequencies takes place such that, when the low-pass effect of the wave field synthesis algorithm occurs, the predistortion is compensated as precisely as possible.
- the impulse response combiner 20 which is to be provided for each speaker channel, then calculates the combination impulse response for each loudspeaker channel and uses it for filtering in the filter 21 for each loudspeaker channel.
- each loudspeaker channel such as the loudspeaker channel 1 (block 21 in FIG. 3)
- the loudspeaker signal for this loudspeaker channel is present.
- the representation of an adder 30 shown in FIG. 3 is to be understood symbolically.
- N adders exist for each loudspeaker channel to represent the loudspeaker signal computed by a block 21 with a corresponding loudspeaker signal of another particulate generator 31 having different characteristics and of course also a loudspeaker signal for an audio object as represented by the control file 402 of FIG is to combine.
- Such a loudspeaker signal is generated by a conventional wave field synthesis device 32.
- the conventional wave-field synthesizer 32 could include a renderer 400 and a control file 402 as shown in FIG. After adding the individual loudspeaker signals for a loudspeaker channel, the resulting loudspeaker signal for this loudspeaker channel (block 33) can then be found at the output of an adder 30, which can then be transmitted to a loudspeaker such as the loudspeaker 403 of FIG. 4.
- the random generator 14 With the help of the parameters from the parameter control, the random generator 14 thus generates positions at which particles are to occur. By the connected timer 18, the frequency of occurring particles is controlled.
- the timing controller 18 serves as a time reference for the random number generator 14 and the impulse response generators 16a, 16b.
- the wave field synthesis parameters scaling and delay are generated for each loudspeaker from a precalculated database (16a).
- a filter impulse response corresponding to the position of the particle is generated, with the generation of the filter impulse response being optional in block 16b.
- the filter impulse response (FIR filter) and the scaling are multiplied vectorially in block 16c. Taking into account the delay, the multiplied, ie scaled filter impulse response is then to some extent "inserted" into the impulse response of the impulse response generator 20.
- this insertion into the impulse response of the impulse response generator is based on both the delay generated by block 16a and the particle's onset time, such as the start time, mid time, or end time the z. B. a raindrop is "active".
- the filter impulse response provided by block 16b may also be processed equally with respect to the delay. Since the impulse response provided by block 16a has only one value, this processing simply results in the impulse response output by block 16b being shifted by the value of the delay. This shifting can either take place before insertion in block 20, or the insertion in block 20 can take place in consideration of this delay, which is preferred for reasons of computing time.
- the impulse response generator 20 is a time buffer configured to sum up the generated impulse responses of the particles along with delays.
- the timing is further adapted to always pass blocks having a predetermined block length of this time buffer to the FFT convolution in block 21 for each speaker channel. It is preferred to use an FFT convolution, that is a fast convolution based on the Fast Fourier Transform, for the filtering by means of the filter 21.
- the FFT convolution fills the ever-changing impulse responses with a non-time-varying particle, namely the audio signal supplied from the particle audio signal block 12. For each pulse from the impulse response generator, a particle signal thus arises at the respective time in the FFT convolution. Since the FFT convolution is a block-oriented convolution, the particle audio signal can be switched with each block. Here it is preferred to compromise between the required computing power on the one hand and the rate of change of the particle audio signal on the other hand. The computing power of the FFT convolution is reduced with larger block sizes, on the other hand, the particle audio signal can only be switched with a larger delay, namely a block. Switching between particles audio signals for example, would be reasonable when switching from snow to rain, or when switching from rain to hail, or if, for example gen of a light rain with "small” drop in a harder Re ⁇ switched with "big” drop becomes.
- the output signals of the FFT folds for each speaker channel can use the standard loudspeaker signals, as shown in Fig. 3 at 30, and of course also with at ⁇ whose particle generators are summed for each each speaker channel, and finally, the resulted animal end loudspeaker signal for a speaker channel.
- the concept according to the invention is advantageous in that a true-to-nature spatial reproduction of frequently occurring sound objects over large listening ranges can be achieved in real time with the aid of a comparatively less computation-intensive computation method.
- a particle audio signal can be duplicated per algorithm described. Due to the built-in position-dependent filtering, it is further preferred to achieve an alienation of the particle. Furthermore, different algorithms can be used in parallel to generate different particles, thus creating an efficient and lifelike sound scenario.
- the inventive concept can be used both as an effect device for wave field synthesis systems and for any surround reproduction systems.
- the three-dimensional system replaces the area information with volume information. Positions are then three-dimensional space positions. The particle density then becomes a particle size / (time 'volume)
- the concept according to the invention is not limited to wave field systems of two-dimensional nature.
- Real three-dimensional systems such as Ambisonics can also be controlled with modified coefficients (scale, delay, filter impulse response) in the single impulse response generator 16 (FIG. 1).
- "Half" two-dimensional systems such as all X.
- Y formats can also be about changing coefficients ⁇ be controlled.
- the FFT convolution in the tunable impulse response filter device 21 can be made computationally favorable with all existing optimization techniques (half block length, blockwise decomposition of the impulse response). Examples For example, reference is made to William H. Press, et al., "Numerical Receipts in C,” 1998, Cambridge University Press.
- the method according to the invention can be implemented in hardware or in software.
- the implementation may be on a digital storage medium, in particular a floppy disk or CD with electronically readable control signals, which may interact with a programmable computer system such that the method is performed.
- the invention thus also consists in a computer program product with a program code stored on a machine-readable carrier for carrying out the method when the computer program product runs on a computer.
- the invention can thus be realized as a computer program with a program code for carrying out the method when the computer program runs on a computer.
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- Stereophonic System (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005027978A DE102005027978A1 (de) | 2005-06-16 | 2005-06-16 | Vorrichtung und Verfahren zum Erzeugen eines Lautsprechersignals aufgrund einer zufällig auftretenden Audioquelle |
PCT/EP2006/005233 WO2006133812A1 (de) | 2005-06-16 | 2006-06-01 | Vorrichtung und verfahren zum erzeugen eines lautsprechersignals aufgrund einer zufällig auftretenden audioquelle |
Publications (2)
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EP1880577A1 true EP1880577A1 (de) | 2008-01-23 |
EP1880577B1 EP1880577B1 (de) | 2009-10-21 |
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EP06754040A Expired - Fee Related EP1880577B1 (de) | 2005-06-16 | 2006-06-01 | Vorrichtung und verfahren zum erzeugen eines lautsprechersignals aufgrund einer zufällig auftretenden audioquelle |
Country Status (6)
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US (1) | US8090126B2 (de) |
EP (1) | EP1880577B1 (de) |
JP (1) | JP4553963B2 (de) |
CN (1) | CN100589656C (de) |
DE (2) | DE102005027978A1 (de) |
WO (1) | WO2006133812A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102005033239A1 (de) * | 2005-07-15 | 2007-01-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zum Steuern einer Mehrzahl von Lautsprechern mittels einer graphischen Benutzerschnittstelle |
JP4736094B2 (ja) * | 2007-01-18 | 2011-07-27 | 独立行政法人産業技術総合研究所 | 音データ生成装置およびプログラム |
US8620003B2 (en) * | 2008-01-07 | 2013-12-31 | Robert Katz | Embedded audio system in distributed acoustic sources |
CN104869335B (zh) * | 2010-03-23 | 2018-09-11 | 杜比实验室特许公司 | 用于局域化感知音频的技术 |
US9124968B2 (en) * | 2010-10-21 | 2015-09-01 | Acoustic 3D Holdings Limited | Acoustic diffusion generator with wells and fluted fins |
DE102011082310A1 (de) | 2011-09-07 | 2013-03-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung, Verfahren und elektroakustisches System zur Nachhallzeitverlängerung |
JP6254864B2 (ja) * | 2014-02-05 | 2017-12-27 | 日本放送協会 | 複数音源配置装置、複数音源配置方法 |
US11010409B1 (en) * | 2016-03-29 | 2021-05-18 | EMC IP Holding Company LLC | Multi-streaming with synthetic replication |
GB201719854D0 (en) * | 2017-11-29 | 2018-01-10 | Univ London Queen Mary | Sound effect synthesis |
US10764701B2 (en) | 2018-07-30 | 2020-09-01 | Plantronics, Inc. | Spatial audio system for playing location-aware dynamic content |
Family Cites Families (5)
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US6728664B1 (en) * | 1999-12-22 | 2004-04-27 | Hesham Fouad | Synthesis of sonic environments |
US7167571B2 (en) * | 2002-03-04 | 2007-01-23 | Lenovo Singapore Pte. Ltd | Automatic audio adjustment system based upon a user's auditory profile |
DE10321980B4 (de) * | 2003-05-15 | 2005-10-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zum Berechnen eines diskreten Werts einer Komponente in einem Lautsprechersignal |
DE10328335B4 (de) * | 2003-06-24 | 2005-07-21 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Wellenfeldsyntesevorrichtung und Verfahren zum Treiben eines Arrays von Lautsprechern |
DE10344638A1 (de) * | 2003-08-04 | 2005-03-10 | Fraunhofer Ges Forschung | Vorrichtung und Verfahren zum Erzeugen, Speichern oder Bearbeiten einer Audiodarstellung einer Audioszene |
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2005
- 2005-06-16 DE DE102005027978A patent/DE102005027978A1/de not_active Withdrawn
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2006
- 2006-06-01 EP EP06754040A patent/EP1880577B1/de not_active Expired - Fee Related
- 2006-06-01 DE DE502006005193T patent/DE502006005193D1/de active Active
- 2006-06-01 JP JP2008516168A patent/JP4553963B2/ja not_active Expired - Fee Related
- 2006-06-01 WO PCT/EP2006/005233 patent/WO2006133812A1/de not_active Application Discontinuation
- 2006-06-01 US US11/917,556 patent/US8090126B2/en not_active Expired - Fee Related
- 2006-06-01 CN CN200680021095A patent/CN100589656C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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See references of WO2006133812A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102005027978A1 (de) | 2006-12-28 |
US8090126B2 (en) | 2012-01-03 |
WO2006133812A1 (de) | 2006-12-21 |
JP2008547255A (ja) | 2008-12-25 |
CN101199235A (zh) | 2008-06-11 |
DE502006005193D1 (de) | 2009-12-03 |
CN100589656C (zh) | 2010-02-10 |
JP4553963B2 (ja) | 2010-09-29 |
US20080181438A1 (en) | 2008-07-31 |
EP1880577B1 (de) | 2009-10-21 |
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