EP1269306A1 - Spatialized audio system for use in a geographical environment - Google Patents
Spatialized audio system for use in a geographical environmentInfo
- Publication number
- EP1269306A1 EP1269306A1 EP01946957A EP01946957A EP1269306A1 EP 1269306 A1 EP1269306 A1 EP 1269306A1 EP 01946957 A EP01946957 A EP 01946957A EP 01946957 A EP01946957 A EP 01946957A EP 1269306 A1 EP1269306 A1 EP 1269306A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- audio
- listener
- environment
- user
- rendering
- 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- Withdrawn
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/07—Use of position data from wide-area or local-area positioning systems in hearing devices, e.g. program or information selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
-
- 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
- H04S2420/11—Application of ambisonics in stereophonic audio systems
-
- 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
- H04S7/303—Tracking of listener position or orientation
- H04S7/304—For headphones
Definitions
- the present invention relates to the field of immersive audio environments and, in particular discloses an immersive environment utilising adaptive tracking capabilities. Background of the invention
- a system for providing a listener with an augmented audio reality in a geographical environment comprising: a position locating system for locating a current position of a listener in the geographical environment; an audio track creation system for creating audio tracks having a predetermined spatialization component in the geographical environment; an audio track rendering system adapted to render an audio signal having spatialization components to a series of speakers surrounding a listener such that the listener experiences an apparent preservation of the spatialization components in the listening experience; an audio track playback system interconnected to the position locating system and the audio track creation system and adapted to forward predetermined audio tracks to the audio rendering system depending on a users location in the audio environment such that the series of speakers locate the predetermined audio tracks in the environment so as to provide for an augmented audio reality.
- the system can simultaneously provide an augmented audio reality to multiple listeners located in the geographical environment in a distributed or centralised processing manner or a combination of both.
- the position locating system preferably can include locating a current orientation of a listener's head and the rendering system can utilize the current orientation in rendering the spatialization components.
- the system has many applicable uses, for example, tourism, outdoor sight seeing, museum tours, a mobility aid for the blind and in industrial applications, artistic performances, Indoor Exhibition Spaces, Outdoor Exhibition spaces, Tours, Exhibitions, City Tours, both guided and self-guided, Botanical Gardens, Zoos, aquariums, Entertainment, Themeparks, Interactive theme environments, VR Games, Construction, auditory display of data such as plans or existing structures below ground, Architectural on-site walk throughs.
- the position locating system preferably can include at least one of a compass, a global positioning system, a radio frequency positioning system or an electromagnetic wave positioning system.
- a system for providing an immersive audio environment around a listener comprising: an audio spatialization system for spatializing the audio of a spatalized audio feed around a listener; an audio customization unit for customizing audio content for the listener thereby creating the spatialized audio feed; a computer network, attached to the audio customization unit for downloading the audio content.
- the user feedback unit can be interconnected to the audio customization unit, for monitoring user's feedback in response to the spatialized audio feed.
- the computer network preferably can include audio content indexed by geographical location and the audio customization unit preferably can include a text to audio rendering unit for rendering the text into audio.
- the feedback unit preferably can include a microphone for monitoring the user's environment with the microphone preferably providing spatialization characteristics of the audio in the user's environment.
- the audio customization unit preferably can include: at least one personality control unit, customizing the audio content with a personality having predetermined characteristics.
- the audio customization unit can be adapted to send a series of information requests containing geographical indicators to the network, and receive therefrom a series of responses containing geographical indicators for rendering to the user.
- the audio customization unit of a first user can be adapted to interact with the audio customization units of other users so as to exchange information.
- the exchange of information can be dependant on the particular user with whom an exchange can be made.
- the computer network preferably can include a series of portals answering requests for information by the audio customization units.
- the audio portals can include personality customized information utilised in answering requests for information.
- Fig. 1 illustrates schematically the locating of audio objects in a geographical space
- Fig. 2 illustrates schematically one form of the preferred embodiment.
- Fig. 3 illustrates a second embodiment of the present invention
- Fig. 4 illustrates one form of the VAPA of Fig. 3
- Fig. 5 illustrates schematically the process of mapping geographic URLs to spatial locations for use in an audio environment.
- Fig. 6 illustrates an alternative embodiment of the present invention
- Fig. 7 and 8 illustrate further alternative embodiments of the present invention.
- an immersive audio system which includes positional tracking information to allow for audio information to be personalised to each listener in the environment so they may be provided with an augmented reality.
- Fig. 1 provides an illustration of the operation of the preferred embodiment and includes a user or listener 1 in an environment.
- the listener is equipped with headphones 2, which, depending on the implementation details of the embodiment, can include a set of standard headphones and an associated audio processing unit, or, for example, a modified form of headphones suitably modified to include the significant DSP processing power required to implement the rendering process required in the preferred embodiment.
- the augmented environment includes a series of objects of interest each of which has a spatial location and an associated audio track.
- the objects of interest may be statues or places of interest in the listener's environment.
- the objects of interest might be paintings or sculptures etc.
- the object appears to 'talk' to the listener 1.
- the preferred embodiment includes an associated audio processing which renders the audio so that it appears to be coining from the spatial position of the object 4.
- the preferred embodiment includes a position detection and orientation system 11 which locates the listener within a predetermined reference frame.
- the system 11 can take many different forms. For example, it can comprise a global positioning system locater to determine a current spatial location of a listener and an accelerometer device to determine a current orientation.
- the accelerometer can take the form of a Microelectromechanical system.
- a velocity component of the listener can be determined from multiple measurements made over a period of time and, if the listener is moving at a walking pace then a weighting can be between a velocity vector of orientation and the accelerometer measurement. Further, as it is likely that a person is looking where they are going, the direction of travel can be used to modify the initial directional vector of the accelerometer. If however, the accelerometer is of high enough accuracy, such modifications may not be required. In an alternative arrangement, the earths magnetic field could be utilised to determine a current orientation.
- the position detection and orientation system outputs a current position and location to a rendering engine 12 and a track player determination unit 13.
- a geographical marker data base 14 is also provided which includes a series of audio tracks 15 - 17 with each audio track having associated location information signifying the location in the augmented environment in which the audio track should occur and from how far away it should be heard.
- the track player determination unit 13 utilises the current position information from the system 11 to determine suitable audio tracks to play around the current position of the listener 15.
- the output audio tracks are then output with associated location information to the rendering engine 12.
- the location information can comprise the relative location of the audio source relative to the listener 15.
- the rendering system 12 renders each audio track given a current orientation of a listener so that it appears to come from the designated position.
- the rendering system can take many forms. For example, United States Standard
- Patent Cooperation Treaty Patent PCT/AU99/00242 discloses a system for
- Headtracked Processing for headtracked playback of audio and, in particular, in the presence of head movements could be used as the rendering engine by rendering the audio track to a predetermined format (e.g. Dolby 5.1 channel surround) so as to have a predetermined location relative to a listener, and, in turn, utilising the system described in the PCT application to then provide for the localisation of an audio signal in the presence of head movements.
- a predetermined format e.g. Dolby 5.1 channel surround
- Patent Cooperation Treaty Patent PCT/AU99/00002 discloses a system for rendering audio such as Dolby 5.1 channel surround to a listener over headphones with suitable computational modifications.
- the overall system is implemented in the form of a highly integrated Application Specific Integrated Circuit (ASIC) and associated memory so as to provide for an extremely compact implementation form.
- ASIC Application Specific Integrated Circuit
- the resulting system allows the wearer to wander at will in space and experience a three dimensional acoustic simulation that is overlaid on the real physical space.
- the sounds heard can be from multiple sources that respond in volume and position as the person moves as if they were real and attached to the real world objects.
- the system can also include sonic objects that are not connected and have non physical range rolloff.
- the system has many applications such as artistic performances, Indoor Exhibition Spaces, Outdoor Exhibition spaces, Tours, Exhibitions, City Tours, both guided and self- guided, Botanical Gardens, Zoos, aquariums, Entertainment, Themeparks, Interactive theme environments, VR Games, Construction, auditory display of data such as plans, existing structures below ground, Architectural on-site walk throughs with interactive auditory display. "And over here there will be a large pink waterfall, tastefully decorated... " etc.
- the system utilises the following elements: Listener position and orientation detection,
- a mobile processing station determines its position and locally processes and renders pre-recorded sound to the listener.
- the system can overlay a virtual sound environment onto real world objects so as to use the system to inform or entertain a user. This allows for use in many fields such as tourism, outdoor sight seeing, museum tours, a mobility aid for the blind and in industrial applications.
- the ability to spatialize audio around a listener provides for the ability for more complex and useful arrangements to be created. In particular, various customizations of the arrangement of Fig.
- VAPA virtual audio personal assistant
- the user 22 utilizes the head tracked and audio spatialized system as before with audio being rendered by rendering system 23.
- the audio system can include sound recording capabilities.
- the sound recording capabilities are provided by B-format microphones which record spatialization characteristics of the audio or the like and the audio and associated tracking information is recorded 24 with portions stored for later analysis 25 before being passed 26 to the VAPA 21.
- the VAPA is interconnected to various networks such as the Internet 28, various service providers 29 and other content providers 30.
- the VAPA provides a customised view of the world customised for the listener 22.
- Fig. 4 there is illustrated 1 schematically one form of implementation of the VAPA 21. Many other forms of implementation will be available to the person skilled in the art of programming and artificial intelligence techniques.
- the elements of Fig. 4 represent the core portions of one software design of the preferred embodiment which can contain the following components: -
- a speech and/or symbol recognition unit 35 which takes as an input the recorded audio stream from the user's environment and applies speech recognition techniques to determine the content of the speech around a listener, including decoding a user's speech. This unit can also determine audio gestures such as tongue clicks or the like of a listener so as to provide for interaction based on these audio gestures. Also, the audio can be itself recorded by audio recording unit 36.
- An audio clip creation unit 38 is responsible for the creation of audio content having a relative spatial location relative to a listener. The audio clips are forwarded to rendering system 23 (Fig. 3) for rendering around a listener. The audio clip creation unit can include text to audio rendering and ideally renders the audio with associated spatialization information for location around a listener.
- a tracking unit 39 accurately keeps and records the location and orientation of a listener's head.
- a master control unit 40 is responsible for the overall control of the VAPA 21.
- a personality engine 43 is responsible for providing various VAPA personalities to the user and interacts with a personality database 43 which stores customisation information of a user's interests and activities etc.
- the system 21 can include various artificial intelligence inferencing engines and learning capabilities 44 which obviously are fully extendable and themselves evolvable over time with advances in AI type techniques.
- a contract negotiation engine 45 is provided for the negotiating of transfer of information and carrying out of transactions across a network interface 46 which interfaces with external networks 47 in accordance with any regulatory framework that may be in place.
- a data cache 48 is provided for storing frequently used data.
- the units of the VAPA can be all interconnected 49 as necessary and can be implemented on a distributed computer architecture such as a clustered computer system so as to provide for significant computation resources. It will be obvious to those skilled in the art that other forms of the implementation of the VAPA are possible.
- the VAPA operates in an environment which is rich in audio information.
- one such environment can comprise an extension of the commonly utilised form of Universal Resource Locaters (URLs) which are commonly utilised on the World Wide Web as a data interfacing and exchange system.
- URLs Universal Resource Locaters
- a URL system is provided which maps geographic locations of particularly unique URLs. An example is shown in Fig. 5 wherein an example is illustrated in which certain geographical locations such as cafes or the like have an associated geographic URL 50,51.
- a listener 52 utilizing the system is able to preferably access the URLs utilizing a standard interfacing technique such as producing a particular audio sound such as clicking a tongue or the like.
- a standard interfacing technique such as producing a particular audio sound such as clicking a tongue or the like.
- the current orientation of the listener's head is taken into account to access the URL eg 50 associated with the location 52.
- the VAPA accesses the associated URL over a computer network so as to download information associated to the URL
- URLs are mapped to physical objects and individuals which are then capable of 'broadcasting' personal information, requests, laying trajectories et al. so as to provide a seamless integration of the experience of the sensory and the informatic realms. Dynamic objects such as people, planes, dogs and motor vehicles can be tracked by a variety of sensing systems.
- the URLs are then accessed so as to stream audio data via the relevant network server. Preferably allowing the users to both send and receive information.
- VAPA virtual object of interest
- a user is therefore able to select/query an object of interest (eye tracking, tongue click or other interface) causing the object to display its data - if this is a commercial object a transactional sequence might be negotiated, either by the user personally or by the VAPA on the users behalf.
- Mobile objects and people can be dynamically tracked and position located.
- the VAPA can selectively screen the data and pass on items of interest to the user who might wish to enter into a direct conversation - alternatively the two individuals might electronically exchange data, and/or arrange an appointment etc. Further refinements are possible.
- the VAPA can take on multiple persona' s, representing various levels of intervention/management/information provision - ie from the informal and friendly to the strictly efficient.
- the VAPA can act also as a personal assistant, maintaining a diary, recognised the day's agenda, requesting advice on how to handle the user, and transacting with external bodies such as taxi companies or the like to order services giving the users URL (and destination and credit card number) which will allow the service provider to locate the user in physical space.
- the user may use non-verbal action (wink) or say tongue click to indicate object of inquiry and launch the various AI engines to search for combinations/links between data associated with physical sites, temporal data (news/stock exchange) and data stored as knowledge.
- the VAPA can then make an initial screening of the data and present the most pertinent elements.
- the keeping of personal information allows the system to remember what a user does each day and responds to the user's behaviour.
- the user can establish a complex set of profiles over time - for example work related interests, a network of contacts, frequently visited physical locations (restaurants, home, work) with which regular sets of activities are associated. Or new locations which are to be visited for which data is selected according to the user's anticipated requirements.
- the system is able to records what a user hears for later retrieval and analysis.
- the VAPA can preferably modulate the volume of various sound sources depending on the orientation of a listener.
- the VAPA can also be capable of tagging audio input (or data input) to a physical location for later user.
- Robert discreetly pipes up again - unsure about my interest in the feral girl wearing a leather jacket down at the other end of the bar. Obviously she had 'blinked' me whilst Robert fixed up the credit card with the barman and decided that we has very similar interests, at least she had offered to by me a drink!
- a user 60 is equipped with a set of headphones 61 which include a position and orientation tracker 62.
- the position and orientation tracker can include magnetic compass or the like, in addition to GPS receiver technology.
- the headphones also include a microphone 63 and are attached to a processing unit for rendering audio spatially 64.
- the processing unit is in turn interconnected to a communications unit 65 which can comprise a mobile phone device or the like.
- the communications device 65 is in permanent connection with a base station 67 so as to transmit position information and microphone audio to the base station 67 and receive structured audio and text data or the like from the base station 67.
- the link can be driven by a communications interface 68 which acts like a modem transmission system.
- the execution portions 69 are provided in a base station.
- the base station includes a number of processing units 70 which provide processing capabilities for a number of different virtual audio personalities.
- the processing unit 70 interacts with a state context cache 71 and operates under the control of a master control program 72.
- the processing unit 70 are in turn interconnected with an Internet interface 72 which interacts with the Internet 73 so as to download information for forwarding to the user 60 in an audio format as previously described.
- the alternative embodiment includes a number of VAPAs 80 which each implement a different audio personality for a user.
- the VAPAs are interconnected to a network 81 which can comprise the Internet for accessing and downloading information on demand.
- Input to the VAPAs include position and orientation data associated with the user.
- the VAPAs output messages to a message sorting unit 81 which determines which messages shall be forwarded to the user depending upon a set of user controls 82 and other state data as previously set by the user. Messages can be in a text or audio format.
- a subset of the messages are output from the message sorting unit 81 with text messages being output to a text to speech processor 84.
- the audio data includes spatalization information and is output to a binauralization unit 85 which spatalizes the audio utilizing the head tracking information 86 for output to headphone devices 87.
- VAPA unit 80 is illustrated in more detail in Fig. 8.
- Each VAPA can implement a separate personality and is operated by a personality engine 91 which interacts with a behaviour and preferences database 92.
- the database 92 can include details on behavioural characteristics of the VAPA including such factors as the voice characteristics of the VAPA, and its priority relative to the other VAPAs.
- the preferences can include the kinds of things that the user is interested in, whether the VAPAs of other users near a current user should be told of the VAPAs presence, whether shops and social services etc should be told of the users presence in the vicinity, what kind of portals the VAPA will talk to.
- the preferred embodiments also allow for a new type of portal (similar to those provided by the likes of Yahoo etc).
- the portals can contain information of say a series of shops selling a particular product in a predetermined area.
- the portals can include an accredited level of advertising and sharing of personal data and can further include specialist portals such as a specialist tour guides etc.
- the VAPA as illustrated in Fig. 8, sends a series of messages to the relevant servers and receives a series of responses to each request. The responses are examined for suitability before being forwarded to the user.
- An example of message can, for example, be "my GPS Co-ordinates are x, y, z and I want to know about men's shoes".
- the response list might include entries of forms such as "GPS coordinate a, b, c includes Bill's Shoe Shop which has a special on Italian shoes for sale".
- the VAPAs are able to converse with a world-wide-web type structure for providing information on demand and allowing the user to experience an augmented audio reality.
- the network can include various push advertising scenarios wherein the owner of a shop of the like pays a fee to make an announcement to a user in their vicinity of a shop sale or the like. The fee can be divided obviously between the providers of the network and the users in accordance with any agreed terms. Further, the user can provide a series of layered personal information facilities.
- VAPAs information can be revealed from one VAPA to a second VAPA depending upon the relationship between the corresponding users VAPAs.
- VAPAs are able to talk to one another and reveal information about their users depending upon the access level of the VAPA requesting information.
- the VAPAs in a sense can act as agent negotiators on behalf of their users, seeking an audio approval from their users when required.
- Various billing arrangement can be provided depending on the level of service provided.
- listeners may receive a portion of revenues for listening to advertisements in the system.
- specialist tours could be provided with the implementers of the system negotiating with famous persons or the like to conduct an audio tour of their favourite place. For example "Elle McPherson's Tour of Dress Shops in Paddington" could be provided to be provided.
- the preferred embodiments obviously have extension to other areas such as military control systems or the like. Further, obviously multiple different VAPAs with different personalities can be presented to a user in an evolving system.
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Abstract
Description
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Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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AUPP534000 | 2000-01-28 | ||
AUPP534000 | 2000-01-28 | ||
AUPP659000 | 2000-03-30 | ||
AUPP659000 | 2000-03-30 | ||
PCT/AU2001/000079 WO2001055833A1 (en) | 2000-01-28 | 2001-01-29 | Spatialized audio system for use in a geographical environment |
Publications (2)
Publication Number | Publication Date |
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EP1269306A1 true EP1269306A1 (en) | 2003-01-02 |
EP1269306A4 EP1269306A4 (en) | 2008-09-03 |
Family
ID=25645848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP01946957A Withdrawn EP1269306A4 (en) | 2000-01-28 | 2001-01-29 | Spatialized audio system for use in a geographical environment |
Country Status (1)
Country | Link |
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EP (1) | EP1269306A4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9854378B2 (en) | 2013-02-22 | 2017-12-26 | Dolby Laboratories Licensing Corporation | Audio spatial rendering apparatus and method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0867860A2 (en) * | 1997-03-26 | 1998-09-30 | Deutsche Thomson-Brandt Gmbh | Method and device for voice-operated remote control with interference compensation of appliances |
-
2001
- 2001-01-29 EP EP01946957A patent/EP1269306A4/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0867860A2 (en) * | 1997-03-26 | 1998-09-30 | Deutsche Thomson-Brandt Gmbh | Method and device for voice-operated remote control with interference compensation of appliances |
Non-Patent Citations (3)
Title |
---|
ECKEL G.: "Applications of the Cyberstage Spatial Sound Server" PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE OF THE AUDIO ENGINEERING SOCIETY: SPATIAL SOUND REPRODUCTION, 10 April 1999 (1999-04-10), - 12 April 1999 (1999-04-12) XP002488618 Rovaniemi, Finland * |
SAWHNEY N ET AL: "Nomadic radio: a spatialized audio environment for wearable computing" WEARABLE COMPUTERS, 1997. DIGEST OF PAPERS., FIRST INTERNATIONAL SYMPO SIUM ON CAMBRIDGE, MA, USA 13-14 OCT. 1997, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 13 October 1997 (1997-10-13), pages 171-172, XP010251562 ISBN: 978-0-8186-8192-9 * |
See also references of WO0155833A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9854378B2 (en) | 2013-02-22 | 2017-12-26 | Dolby Laboratories Licensing Corporation | Audio spatial rendering apparatus and method |
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EP1269306A4 (en) | 2008-09-03 |
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