EP1341398A1 - Portable audio system - Google Patents
Portable audio system Download PDFInfo
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- EP1341398A1 EP1341398A1 EP02003926A EP02003926A EP1341398A1 EP 1341398 A1 EP1341398 A1 EP 1341398A1 EP 02003926 A EP02003926 A EP 02003926A EP 02003926 A EP02003926 A EP 02003926A EP 1341398 A1 EP1341398 A1 EP 1341398A1
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- sound
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- 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
- H04S1/005—For headphones
Definitions
- the invention relates to a portable Sound reproduction device with a Sound player and at least one sound transducer, the one with the sound player Signal connection is connected.
- the transducer is usually in the form of headphones realized that emits acoustic signals that electrical signals from the sound player assigned.
- the invention is based on the object to create a portable sound reproducer that a spatial perception of a sound source by a Permitted users of the sound reproduction device.
- This task is carried out in the portable mentioned above Sound reproduction device solved in that the Sound reproduction device with sensors for detecting Orientation data about the orientation of the transducer is equipped in the room and that the Sound player, which the orientation data from the Sensors fed out via another signal connection an orientation data comparator for Compare current orientation data with reference data for determining a reorientation of the sound transducer in the room and a control device for controlling a Sound output signal filter due to the sound player a result of the orientation data comparator has so that a virtual Sound source formed by the sound transducer a reorientation of the sound transducer in the room in remains essentially stationary.
- MP3 players in particular come as sound playback devices and communication terminals that also play sound signals can, in question.
- the portable Sound reproduction device can completely on the in the state the technology provided fixed reference signal transmitter to be dispensed with. Rather, can be required Reference data directly at the sound player are present, so that the control device due to the Reference data and the orientation data from the sensors a current orientation of the head of a user who can use headphones.
- Reference data are data from the sensors, which one correspond to the predetermined zero position of the sound transducer, while the sensors transmit orientation data, the one certain orientation of the transducer in the describe three-dimensional space.
- the reference data can also be used with a predetermined frequency are updated, each relative changes from a previous record to one current record can be found, each Record of a specific orientation of the sound transducer in the Space is assigned. In this way, due to an autocorrelation between the orientation data and the Reference data on a change in the orientation of the Close the transducer in the room.
- the control device for adapting one is preferred a human head related transfer function (“HRTF”, "head related transfer function”) trained the a sound transmission between the virtual sound source and describes the sound pressure of the sound transducer.
- HRTF human head related transfer function
- This transfer function becomes dependent on the results adapted to the orientation data comparison device, that the virtual sound source for a user of the portable sound reproducer essentially remains stationary.
- the sound reproducing device can be an orientation reference signal transmitter have that in one essentially constant distance from the sound transducer is arranged, the sensors for detecting components of a Reference signal can be designed as the orientation data can.
- the reference signal generator can be, for example Generate magnetic field, its three spatial components of three suitably arranged sensors can be detected. The so Orientation data determined can then be used for a Zero position of the sound transducer representative reference data be compared to a current orientation of the Determine sound transducer in the room.
- the orientation reference signal transmitter can for example in the Sound playback device can be integrated. However, it is also possible that he's near the at least one Sound transducer is arranged. It is only essential that he follow a translational movement of the least a sound transducer is arranged in the room.
- the orientation reference signal transmitter to the at least one sound transducer is arranged adjacent, can the sensors for the orientation data at the Sound player are located.
- orientation reference signal generator is used for a Embodiment in a communication terminal with associated Integrated antenna, its reference signals can be via the standard antenna are broadcast, whereby then the sensors for acquiring orientation data the transducer will be located.
- the orientation reference signal transmitter is preferably in the Integrated player.
- At least one optical Camera for continuous acquisition of current image data than that Orientation data is provided to follow a Reorientation of the sound transducer in the room is appropriate.
- the optical camera can, for example, directly on a Be attached to the transducer and continuously images one at least partially stationary environment of a user of the Record sound reproduction device. Based on recorded image signals can change the orientation of the Sound transducer can be determined in the room. By comparison or Autocorrelation between current image data as Orientation data and previous image data as Reference data can this reorientation of Sound transducer can be detected in the room.
- a Sound reproduction device a communication terminal, the is suitable for playing sound signals, and a Headphones with two transducers.
- Raw sound signals are from the communication terminal
- Filtered transfer functions that affect the Orientation of the sound transducers in the room refer to a spatial perception of the sound signals (music) simulate.
- the transfer functions are designed that a user of the headphones gets the impression that Sound signals came from a certain position in the room, on which a virtual sound source is arranged.
- the communication terminal uses a Orientation data reference sensor a magnetic field, the Field strength is chosen so that three orthogonal coils on Headphones can receive the reference signal as sensors.
- the communication terminal is in a substantially fixed distance from the headphones and will for example in a jacket or trouser pocket User of the headphones worn.
- reference data are measured sensor values for a predetermined zero position of the Headphones used.
- the orientation data and the reference data are the above addressed transfer functions by means of a Control device changed so that the location of the virtual Sound source regardless of a current orientation of the Headphones remains constant.
- orientation reference signal transmitter that sends out the reference signal
- the reference signal generator is a separate additional device.
- headphones should be provided to the play filtered raw sound signals.
- one or more optical cameras are provided, for example with a repetition rate of at least 60 Hz
- Record image data for a current orientation of the headphones are representative in the room.
- the image data of a previous image as reference data are stored in a Orientation data comparison device with a current one Image consisting of orientation data compared.
- the Result of the comparison or an autocorrelation between the previous and the current image concludes about the current orientation of the headphones in the Space, so that, as already explained above, an adjustment of the Transfer functions via a control device of the Communication terminal can be made.
- CMOS cameras can be used for the optical cameras are used, which are very small and inexpensive, so that the sound reproducing device with little effort can be produced.
- each of the two described embodiments of the Invention is a signal connection for each filtered sound signals and a signal connection for the Sensor signals provided, in the first embodiment the three orthogonal coils and in the second Embodiment the optical cameras the sensors form.
- the invention is not based on the Use with communication terminals as Sound players is limited. Rather come any portable sound player as a component the sound reproduction device according to the invention, the one with a control device and one Comparison device can be equipped according to the invention can.
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- Acoustics & Sound (AREA)
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Abstract
Description
Die Erfindung bezieht sich auf eine tragbare Schallwiedergabevorrichtung mit einer Schallabspieleinrichtung und mindestens einem Schallwandler, der mit der Schallabspieleinrichtung über eine Signalverbindung verbunden ist.The invention relates to a portable Sound reproduction device with a Sound player and at least one sound transducer, the one with the sound player Signal connection is connected.
Bei einer solchen tragbaren Schallwiedergabevorrichtung ist der Schallwandler üblicher Weise in Form eines Kopfhörers realisiert, der akustische Signale aussendet, die elektrischen Signalen von der Schallabspieleinrichtung zugeordnet sind.With such a portable sound reproduction device the transducer is usually in the form of headphones realized that emits acoustic signals that electrical signals from the sound player assigned.
Allgemein besteht eine Entwicklungsrichtung im Hinblick auf Schallwiedergabevorrichtungen darin, eine räumliche Wahrnehmung einer Schallquelle zu erzielen, wobei das Schallsignal mit einer sog. "Head Related Transfer Function" "(HRTF)" gefiltert wird. Solche Funktionen beschreiben die Schallübertragung zwischen einem Punkt im Raum, an dem eine Schallquelle angeordnet ist, und dem Schalldruck am Ort des Empfängers. Die Funktionen hängen von der Position der Schallquelle sowie von einer Orientierung des Schallwandlers im Raum ab, wobei die Orientierung des Schallwandlers, wenn er als Kopfhörer ausgebildet ist, von einer Orientierung des Kopfes eines Benutzers der Schallwiedergabevorrichtung abhängt.There is a general direction of development with regard to Sound reproduction devices in it, a spatial To achieve perception of a sound source, the Sound signal with a so-called "head related transfer function" "(HRTF)" is filtered. Such functions describe the Sound transmission between a point in space at which one Sound source is arranged, and the sound pressure at the location of the Receiver. The functions depend on the position of the Sound source and an orientation of the sound transducer in the room, taking the orientation of the transducer when it is designed as headphones, from an orientation of the Head of a user of the sound reproducing device depends.
Optimale Ergebnisse zum Herbeiführen einer räumlichen Wahrnehmung einer ortsfesten Schallquelle werden erreicht, wenn die Funktion ständig an die Position des Kopfes des Benutzers angepasst wird, so dass der Schall immer von der gleichen virtuellen Position im Raum zu kommen scheint. Optimal results for bringing about a spatial Perception of a stationary sound source is achieved if the function is constantly at the position of the head of the Is adjusted so that the sound is always from the same virtual position in space seems to come.
Ein solcher akustischer Effekt ist jedoch bisher bei tragbaren Schallwiedergabevorrichtungen nicht erzielbar. Aus dem Stand der Technik ist nämlich bisher eine Anordnung bekannt, bei der ein Schallabspielgerät ortsfest angeordnet ist, während ein Schallwandler in Form eines Kopfhörers mobil ausgestaltet ist, so dass sich ein Benutzer der Anordnung insgesamt frei im Raum bewegen kann. Ein ebenfalls ortsfester Sender sendet ein Referenzsignal, beispielsweise ein Magnetfeld, aus, das von in den Kopfhörer eingebauten Sensoren empfangen wird. Diese empfangenen Signale werden an eine Steuereinrichtung übertragen, die anhand des gesendeten Referenzsignals und der von den Sensoren empfangenen Signale die Kopforientierung bzw. die Orientierung des Schallwandlers im Raum ermitteln kann: Aufgrund dessen wird die oben angesprochene Funktion so angepasst, dass der Benutzer des Kopfhörers den Eindruck gewinnt, die Position seiner Schallquelle bleibe ortsfest. Da der im Stand der Technik vorgesehene Sender für das Referenzsignal sich in einer festen Position im Raum befinden muss, ist die Anordnung insgesamt ungeeignet für tragbare Schallwiedergabevorrichtungen.However, such an acoustic effect has so far been portable sound reproduction devices not achievable. Out the prior art is namely an arrangement known, in which a sound player arranged stationary is mobile while a transducer in the form of a headphone is designed so that a user of the arrangement can move freely in space. Another stationary Sender sends a reference signal, for example Magnetic field, from that built into the headphones Sensors is received. These received signals are on transmit a control device based on the transmitted Reference signal and the signals received by the sensors the head orientation or the orientation of the transducer can determine in space: Because of this, the above Function addressed so that the user of the Headphone wins the impression, its position Sound source remain stationary. Because of the state of the art provided transmitter for the reference signal in one The position must be in a fixed position in the room overall unsuitable for portable Sound reproduction devices.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, eine tragbare Schallwiedergabevorrichtung zu schaffen, die eine räumliche Wahrnehmung einer Schallquelle durch einen Benutzer der Schallwiedergabevorrichtung gestattet.Proceeding from this, the invention is based on the object to create a portable sound reproducer that a spatial perception of a sound source by a Permitted users of the sound reproduction device.
Diese Aufgabe wird bei der eingangs genannten tragbaren Schallwiedergabevorrichtung dadurch gelöst, dass die Schallwiedergabevorrichtung mit Sensoren zum Erfassen von Orientierungsdaten über die Orientierung des Schallwandlers im Raum ausgestattet ist und dass die Schallabspieleinrichtung, der die Orientierungsdaten von den Sensoren aus über eine weitere Signalverbindung zugeleitet werden, eine Orientierungsdaten-Vergleichseinrichtung zum Vergleichen aktueller Orientierungsdaten mit Referenzdaten zum Bestimmen einer Umorientierung des Schallwandlers im Raum und eine Steuereinrichtung zum Steuern eines Schallausgabesignalfilters des Schallabspielgerätes aufgrund eines Ergebnisses der Orientierungsdaten-Vergleichseinrichtung aufweist, so dass eine virtuelle Schallquelle, die von dem Schallwandler gebildet wird, bei einer Umorientierung des Schallwandlers im Raum im wesentlichen ortsfest bleibt.This task is carried out in the portable mentioned above Sound reproduction device solved in that the Sound reproduction device with sensors for detecting Orientation data about the orientation of the transducer is equipped in the room and that the Sound player, which the orientation data from the Sensors fed out via another signal connection an orientation data comparator for Compare current orientation data with reference data for determining a reorientation of the sound transducer in the room and a control device for controlling a Sound output signal filter due to the sound player a result of the orientation data comparator has so that a virtual Sound source formed by the sound transducer a reorientation of the sound transducer in the room in remains essentially stationary.
Als Schallabspieleinrichtungen kommen insbesondere MP3-Player und Kommunikationsendgeräte, die auch Schallsignale abspielen können, in Frage. Bei der tragbaren Schallwiedergabevorrichtung kann vollständig auf den im Stand der Technik vorgesehenen, ortsfesten Referenzsignale-Sender verzichtet werden. Vielmehr können erforderliche Referenzdaten unmittelbar an der Schallabspieleinrichtung vorliegen, so dass die Steuereinrichtung aufgrund der Referenzdaten und der Orientierungsdaten von den Sensoren eine aktuelle Orientierung des Kopfes eines Benutzers, der einen Kopfhörer verwendet, umsetzen kann.MP3 players in particular come as sound playback devices and communication terminals that also play sound signals can, in question. With the portable Sound reproduction device can completely on the in the state the technology provided fixed reference signal transmitter to be dispensed with. Rather, can be required Reference data directly at the sound player are present, so that the control device due to the Reference data and the orientation data from the sensors a current orientation of the head of a user who can use headphones.
Als Referenzdaten sind jegliche Daten denkbar, die es gestatten, eine relative Änderung der Orientierung des Schallwandlers im Raum zu bestimmen. So können die Referenzdaten Daten der Sensoren sein, die einer vorbestimmten Nulllage des Schallwandlers entsprechen, während die Sensoren Orientierungsdaten übermitteln, die eine bestimmte Orientierung des Schallwandlers im dreidimensionalen Raum beschreiben.Any data is conceivable as reference data allow a relative change in the orientation of the Determine sound transducer in the room. So they can Reference data are data from the sensors, which one correspond to the predetermined zero position of the sound transducer, while the sensors transmit orientation data, the one certain orientation of the transducer in the describe three-dimensional space.
Alternativ können die Referenzdaten auch mit einer vorbestimmten Häufigkeit aktualisiert werden, wobei jeweils relative Änderungen eines vorhergehenden Datensatzes zu einem aktuellen Datensatz festgestellt werden, wobei jeder Datensatz einer bestimmten Orientierung des Schallwandlers im Raum zugeordnet ist. Auf diese Weise lässt sich aufgrund einer Autokorrelation zwischen den Orientierungsdaten und den Referenzdaten auf eine Änderung der Orientierung des Schallwandlers im Raum rückschließen.Alternatively, the reference data can also be used with a predetermined frequency are updated, each relative changes from a previous record to one current record can be found, each Record of a specific orientation of the sound transducer in the Space is assigned. In this way, due to an autocorrelation between the orientation data and the Reference data on a change in the orientation of the Close the transducer in the room.
Bevorzug ist die Steuereinrichtung zum Anpassen einer auf einen menschlichen Kopf bezogenen Übertragungsfunktion ("HRTF", "head related transfer function") ausgebildet, die eine Schallübertragung zwischen der virtuellen Schallquelle und dem Schalldruck des Schallwandlers beschreibt.The control device for adapting one is preferred a human head related transfer function ("HRTF", "head related transfer function") trained the a sound transmission between the virtual sound source and describes the sound pressure of the sound transducer.
Diese Übertragungsfunktion wird abhängig von den Ergebnissen der Orientierungsdaten-Vergleichseinrichtung so angepasst, dass die virtuelle Schallquelle für einen Benutzer der tragbaren Schallwiedergabevorrichtung im wesentlichen ortsfest bleibt. Wie im Stand der Technik bekannt, durchlaufen die Roh-Schallsignale von der Schallabspieleinrichtung aus ein Filter, das durch die Übertragungsfunktion, die von der Orientierung des Schallwandlers im Raum abhängt, charakterisiert ist, bevor sie zum Schallwandler gelangen.This transfer function becomes dependent on the results adapted to the orientation data comparison device, that the virtual sound source for a user of the portable sound reproducer essentially remains stationary. As is known in the art, pass through the raw sound signals from the Sound playback device from a filter through the Transfer function that depends on the orientation of the Sound transducer in the room depends on, is characterized before they get to the transducer.
Die Schallwiedergabevorrichtung kann einen Orientierungs-Referenzsignalgeber aufweisen, der in einem im wesentlichen gleichbleibenden Abstand zu dem Schallwandler angeordnet ist, wobei die Sensoren zum Erfassen von Komponenten eines Referenzsignals als die Orientierungsdaten ausgebildet sein können. Der Referenzsignalgeber kann beispielsweise ein Magnetfeld erzeugen, dessen drei Raumkomponenten von drei geeignet angeordneten Sensoren erfasst werden können. Die so ermittelten Orientierungsdaten können dann mit für eine Nulllage des Schallwandlers repräsentativen Referenzdaten verglichen werden, um eine aktuelle Orientierung des Schallwandlers im Raum festzustellen. Der Orientierungs-Referenzsignalgeber kann beispielsweise in die Schallabspieleinrichtung integriert sein. Es ist jedoch auch möglich, dass er in der Nähe des mindestens einen Schallwandlers angeordnet ist. Wesentlich ist lediglich, dass er zum Folgen einer translatorischen Bewegung des mindestens einen Schallwandlers im Raum angeordnet ist.The sound reproducing device can be an orientation reference signal transmitter have that in one essentially constant distance from the sound transducer is arranged, the sensors for detecting components of a Reference signal can be designed as the orientation data can. The reference signal generator can be, for example Generate magnetic field, its three spatial components of three suitably arranged sensors can be detected. The so Orientation data determined can then be used for a Zero position of the sound transducer representative reference data be compared to a current orientation of the Determine sound transducer in the room. The orientation reference signal transmitter can for example in the Sound playback device can be integrated. However, it is also possible that he's near the at least one Sound transducer is arranged. It is only essential that he follow a translational movement of the least a sound transducer is arranged in the room.
Wenn beispielsweise der Orientierungs-Referenzsignalgeber dem mindestens einen Schallwandler benachbart angeordnet ist, können sich die Sensoren für die Orientierungsdaten an der Schallabspieleinrichtung befinden.If, for example, the orientation reference signal transmitter to the at least one sound transducer is arranged adjacent, can the sensors for the orientation data at the Sound player are located.
Wenn der Orientierungs-Referenzsignalgeber bei einer Ausführungsform in ein Kommunikationsendgerät mit zugehöriger Antenne integriert ist, können seine Referenzsignale über die standardmäßig vorhandene Antenne ausgestrahlt werden, wobei sich dann die Sensoren zum Erfassen von Orientierungsdaten an dem Schallwandler befinden werden.If the orientation reference signal generator is used for a Embodiment in a communication terminal with associated Integrated antenna, its reference signals can be via the standard antenna are broadcast, whereby then the sensors for acquiring orientation data the transducer will be located.
Bevorzugt ist der Orientierungs-Referenzsignalgeber in das Abspielgerät integriert.The orientation reference signal transmitter is preferably in the Integrated player.
Es ist alternativ möglich, dass mindestens eine optische Kamera zum fortlaufenden Erfassen aktueller Bilddaten als die Orientierungsdaten vorgesehen ist, die zum Folgen einer Umorientierung des Schallwandlers im Raum angebracht ist. Die optische Kamera kann beispielsweise unmittelbar an einem Schallwandler befestigt sein und fortlaufend Bilder einer wenigstens teilweise ortsfesten Umgebung eines Benutzers der Schallwiedergabevorrichtung aufnehmen. Anhand der aufgenommenen Bildsignale kann die Orientierung des Schallwandlers im Raum bestimmt werden. Durch Vergleich bzw. Autokorrelation zwischen aktuellen Bilddaten als Orientierungsdaten und vorhergehenden Bilddaten als Referenzdaten können diese Umorientierungen des Schallwandlers im Raum erfasst werden.It is alternatively possible that at least one optical Camera for continuous acquisition of current image data than that Orientation data is provided to follow a Reorientation of the sound transducer in the room is appropriate. The optical camera can, for example, directly on a Be attached to the transducer and continuously images one at least partially stationary environment of a user of the Record sound reproduction device. Based on recorded image signals can change the orientation of the Sound transducer can be determined in the room. By comparison or Autocorrelation between current image data as Orientation data and previous image data as Reference data can this reorientation of Sound transducer can be detected in the room.
Ausführungsbeispiele der Erfindung werden nachfolgend noch näher beschrieben. Embodiments of the invention are described below described in more detail.
Bei einem ersten Ausführungsbeispiel weist eine Schallwiedergabevorrichtung ein Kommunikationsendgerät, das zum Abspielen von Schallsignalen geeignet ist, und einen Kopfhörer mit zwei Schallwandlern auf. Roh-Schallsignale werden von dem Kommunikationsendgerät mit Übertragungsfunktionen gefiltert, die sich auf die Orientierung der Schallwandler im Raum beziehen, um eine räumliche Wahrnehmung der Schallsignale (Musik) zu simulieren. Die Übertragungsfunktionen sind so beschaffen, dass ein Benutzer des Kopfhörers den Eindruck gewinnt, die Schallsignale stammten von einer bestimmten Position im Raum, an dem eine virtuelle Schallquelle angeordnet ist.In a first embodiment, a Sound reproduction device a communication terminal, the is suitable for playing sound signals, and a Headphones with two transducers. Raw sound signals are from the communication terminal Filtered transfer functions that affect the Orientation of the sound transducers in the room refer to a spatial perception of the sound signals (music) simulate. The transfer functions are designed that a user of the headphones gets the impression that Sound signals came from a certain position in the room, on which a virtual sound source is arranged.
Das Kommunikationsendgerät bildet mittels eines Orientierungsdaten-Referenzgebers ein Magnetfeld, dessen Feldstärke so gewählt ist, dass drei orthogonale Spulen am Kopfhörer als Sensoren das Referenzsignal empfangen können.The communication terminal uses a Orientation data reference sensor a magnetic field, the Field strength is chosen so that three orthogonal coils on Headphones can receive the reference signal as sensors.
Das Kommunikationsendgerät befindet sich in einem im wesentlichen festen Abstand von dem Kopfhörer und wird beispielsweise in einer Jacken- oder Hosentasche eines Benutzers des Kopfhörers getragen.The communication terminal is in a substantially fixed distance from the headphones and will for example in a jacket or trouser pocket User of the headphones worn.
Über eine Signalverbindung empfängt das Kommunikationsendgerät die von den Sensoren kommenden Signale, die Komponenten des statischen Magnetfeldes wiedergeben, so dass Orientierungsdaten von den Sensoren dem Kommunikationsendgerät, dort einer Orientierungsdaten-Vergleichseinrichtung, zugeleitet werden. Als Referenzdaten werden Sensormesswerte für eine vorbestimmte Nulllage des Kopfhörers verwendet. Abhängig von den Differenzen zwischen den Orientierungsdaten und der Referenzdaten werden die oben angesprochenen Übertragungsfunktionen mittels einer Steuereinrichtung geändert, so dass die Lage der virtuellen Schallquelle unabhängig von einer aktuellen Orientierung des Kopfhörers konstant bleibt. This receives via a signal connection Communication terminal that comes from the sensors Signals, the components of the static magnetic field reproduce so that orientation data from the sensors Communication terminal, there an orientation data comparison device, be forwarded. As reference data are measured sensor values for a predetermined zero position of the Headphones used. Depending on the differences between The orientation data and the reference data are the above addressed transfer functions by means of a Control device changed so that the location of the virtual Sound source regardless of a current orientation of the Headphones remains constant.
Es ist darauf hinzuweisen, dass der Orientierungs-Referenzsignalgeber, der das Referenzsignal aussendet, nicht notwendiger Weise in das Kommunikationsendgerät als Schallabspieleinrichtung integriert sein muss. Vielmehr ist es auch möglich, dass es sich bei dem Referenzsignalgeber um ein gesondertes Zusatzgerät handelt.It should be noted that the orientation reference signal transmitter, that sends out the reference signal, not necessarily in the communication terminal as Sound player must be integrated. Rather is it is also possible that the reference signal generator is is a separate additional device.
Bei einem weiteren Ausführungsbeispiel der Erfindung ist das Schallabspielgerät wiederum als Kommunikationsendgerät ausgeführt, das auch Schallsignale abspielen kann. In ähnlicher Weise wie im vorhergesehen Ausführungsbeispiel sind Übertragungsfunktionen zum Filtern von Roh-Schallsignale von dem Kommunikationsendgerät vorgesehen, die als Filter für die Roh-Schallsignale dienen.In a further embodiment of the invention that is Sound player in turn as a communication terminal executed, which can also play sound signals. In are similar to those in the intended embodiment Transfer functions for filtering raw sound signals from the communication terminal provided as a filter for the Raw sound signals are used.
Wiederum soll ein Kopfhörer vorgesehen sein, um die gefilterten Roh-Schallsignale wiederzugeben. An diesem Kopfhörer sind eine oder mehrere optische Kameras vorgesehen, die beispielsweise mit einer Wiederholrate von wenigstens 60 Hz Bilddaten aufnehmen, die für eine aktuelle Orientierung des Kopfhörers im Raum repräsentativ sind. Die Bilddaten eines vorhergehenden Bildes als Referenzdaten werden in einer Orientierungsdaten-Vergleichseinrichtung mit einem aktuellen Bild, das aus Orientierungsdaten besteht, verglichen. Das Ergebnis des Vergleichs bzw. einer Autokorrelation zwischen dem vorhergehenden und dem aktuellen Bild liefert Rückschlüsse über die aktuelle Orientierung des Kopfhörers im Raum, so dass, wie oben bereits erläutert, eine Anpassung der Übertragungsfunktionen über eine Steuereinrichtung des Kommunikationsendgerätes vorgenommen werden kann.Again, headphones should be provided to the play filtered raw sound signals. At this Headphones one or more optical cameras are provided, for example with a repetition rate of at least 60 Hz Record image data for a current orientation of the headphones are representative in the room. The image data of a previous image as reference data are stored in a Orientation data comparison device with a current one Image consisting of orientation data compared. The Result of the comparison or an autocorrelation between the previous and the current image Conclusions about the current orientation of the headphones in the Space, so that, as already explained above, an adjustment of the Transfer functions via a control device of the Communication terminal can be made.
Für die optischen Kameras können insbesondere CMOS-Kameras eingesetzt werden, die sehr klein und kostengünstig sind, so dass die Schallwiedergabevorrichtung ohne großen Aufwand herstellbar ist. In particular, CMOS cameras can be used for the optical cameras are used, which are very small and inexpensive, so that the sound reproducing device with little effort can be produced.
Bei jeder der beiden beschriebenen Ausführungsformen der Erfindung ist jeweils eine Signalverbindung für die gefilterten Schallsignale und eine Signalverbindung für die Sensorsignale vorgesehen, wobei im ersten Ausführungsbeispiel die drei orthogonalen Spulen und im zweiten Ausführungsbeispiel die optischen Kameras die Sensoren bilden.In each of the two described embodiments of the Invention is a signal connection for each filtered sound signals and a signal connection for the Sensor signals provided, in the first embodiment the three orthogonal coils and in the second Embodiment the optical cameras the sensors form.
Es ist hervorzuheben, dass die Erfindung nicht auf den Einsatz bei Kommunikationsendgeräten als Schallabspieleinrichtungen beschränkt ist. Vielmehr kommen jegliche tragbaren Schallabspieleinrichtungen als Komponenten der Schallwiedergabevorrichtung nach der Erfindung in Frage, die mit einer Steuereinrichtung und einer Vergleichseinrichtung nach der Erfindung ausgestattet werden können.It should be emphasized that the invention is not based on the Use with communication terminals as Sound players is limited. Rather come any portable sound player as a component the sound reproduction device according to the invention, the one with a control device and one Comparison device can be equipped according to the invention can.
Claims (5)
dadurch gekennzeichnet, dass die Schallwiedergabevorrichtung mit Sensoren zum Erfassen von Orientierungsdaten über die Orientierung des Schallwandlers im Raum ausgestattet ist und
dass die Schallabspieleinrichtung, der die Orientierungsdaten von den Sensoren aus über eine weitere Signalverbindung zugeleitet werden, eine Orientierungsdaten-Vergleichseinrichtung zum Vergleichen aktueller Orientierungsdaten mit Referenzdaten zum Bestimmen einer Umorientierung des Schallwandlers im Raum und eine Steuereinrichtung zum Steuern eines Schallausgabesignalfilters des Schallabspielgerätes aufgrund eines Ergebnisses der Orientierungsdaten-Vergleichseinrichtung aufweist, so dass eine virtuelle Schallquelle, die von dem Schallwandler gebildet wird, bei einer Umorientierung des Schallwandlers im Raum im wesentlichen ortsfest bleibt.Portable sound reproduction device with a sound playback device and at least one sound transducer, which is connected to the sound playback device via a signal connection,
characterized in that the sound reproduction device is equipped with sensors for detecting orientation data about the orientation of the sound transducer in the room and
that the sound playback device, to which the orientation data is fed from the sensors via a further signal connection, an orientation data comparison device for comparing current orientation data with reference data for determining a reorientation of the sound transducer in the room, and a control device for controlling a sound output signal filter of the sound playback device based on a result of the orientation data -Comparative device, so that a virtual sound source, which is formed by the sound transducer, remains essentially stationary when the sound transducer is reoriented in the room.
dadurch gekennzeichnet, dass die Steuereinrichtung zum Anpassen einer auf einen menschlichen Kopf bezogenen Übertragungsfunktion ("HRTF", "head related transfer function") ausgebildet ist, die eine Schallübertragung zwischen der virtuellen Schallquelle und dem Schalldruck des Schallwandlers beschreibt. Sound reproduction device according to claim 1,
characterized in that the control device is designed to adapt a transfer function ("HRTF", "head related transfer function") which describes a sound transmission between the virtual sound source and the sound pressure of the sound transducer.
dadurch gekennzeichnet, dass sie einen Orientierungs-Referenzsignalgeber aufweist, der in einem in wesentlichen gleichbleibenden Abstand zu dem Schallwandler angeordnet ist, und die Sensoren zum Erfassen von Komponenten eines Referenzsignals als die Orientierungsdaten ausgebildet sind.Sound reproduction device according to one of claims 1 or 2,
characterized in that it has an orientation reference signal transmitter which is arranged at a substantially constant distance from the sound transducer, and the sensors are designed to detect components of a reference signal as the orientation data.
dadurch gekennzeichnet, dass der Orientierungs-Referenzsignalgeber in das Schallabspielgerät integriert ist.Sound reproduction device according to claim 3,
characterized in that the orientation reference signal transmitter is integrated in the sound player.
dadurch gekennzeichnet, dass mindestens eine optische Kamera zum fortlaufenden Erfassen aktueller Bilddaten als die Orientierungsdaten vorgesehen ist, die zum Folgen einer Umorientierung des Schallwandlers im Raum angebracht ist.Sound reproduction device according to one of Claims 1 to 3,
characterized in that at least one optical camera for continuously capturing current image data is provided as the orientation data, which is attached to follow a reorientation of the sound transducer in the room.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES02003926T ES2234938T3 (en) | 2002-02-21 | 2002-02-21 | PORTABLE AUDIO DEVICE. |
| DE50201769T DE50201769D1 (en) | 2002-02-21 | 2002-02-21 | Portable sound reproduction device |
| EP02003926A EP1341398B1 (en) | 2002-02-21 | 2002-02-21 | Portable audio system |
| AT02003926T ATE285163T1 (en) | 2002-02-21 | 2002-02-21 | PORTABLE SOUND REPRODUCING DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02003926A EP1341398B1 (en) | 2002-02-21 | 2002-02-21 | Portable audio system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1341398A1 true EP1341398A1 (en) | 2003-09-03 |
| EP1341398B1 EP1341398B1 (en) | 2004-12-15 |
Family
ID=27675630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02003926A Expired - Lifetime EP1341398B1 (en) | 2002-02-21 | 2002-02-21 | Portable audio system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1341398B1 (en) |
| AT (1) | ATE285163T1 (en) |
| DE (1) | DE50201769D1 (en) |
| ES (1) | ES2234938T3 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1675432A1 (en) * | 2004-12-27 | 2006-06-28 | Siemens Aktiengesellschaft | Mobile communication teminal for generating a spatially fixed virtual sound source |
| WO2007004147A2 (en) * | 2005-07-04 | 2007-01-11 | Koninklijke Philips Electronics N.V. | Stereo dipole reproduction system with tilt compensation. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0465662A1 (en) * | 1990-01-19 | 1992-01-15 | Sony Corporation | Apparatus for reproducing acoustic signals |
| JPH0444500A (en) * | 1990-06-11 | 1992-02-14 | Yamaha Corp | Headphone system |
| US5146501A (en) * | 1991-03-11 | 1992-09-08 | Donald Spector | Altitude-sensitive portable stereo sound set for dancers |
| WO1999014735A2 (en) * | 1997-09-05 | 1999-03-25 | Manouilov Mikhail Valentinovic | Acoustic signal reproducing apparatus |
-
2002
- 2002-02-21 DE DE50201769T patent/DE50201769D1/en not_active Expired - Lifetime
- 2002-02-21 EP EP02003926A patent/EP1341398B1/en not_active Expired - Lifetime
- 2002-02-21 AT AT02003926T patent/ATE285163T1/en not_active IP Right Cessation
- 2002-02-21 ES ES02003926T patent/ES2234938T3/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0465662A1 (en) * | 1990-01-19 | 1992-01-15 | Sony Corporation | Apparatus for reproducing acoustic signals |
| JPH0444500A (en) * | 1990-06-11 | 1992-02-14 | Yamaha Corp | Headphone system |
| US5146501A (en) * | 1991-03-11 | 1992-09-08 | Donald Spector | Altitude-sensitive portable stereo sound set for dancers |
| WO1999014735A2 (en) * | 1997-09-05 | 1999-03-25 | Manouilov Mikhail Valentinovic | Acoustic signal reproducing apparatus |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 016, no. 233 (E - 1209) 28 May 1992 (1992-05-28) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1675432A1 (en) * | 2004-12-27 | 2006-06-28 | Siemens Aktiengesellschaft | Mobile communication teminal for generating a spatially fixed virtual sound source |
| WO2006069825A1 (en) * | 2004-12-27 | 2006-07-06 | Siemens Aktiengesellschaft | Mobile communication terminal for producing a fixed virtual sound source |
| WO2007004147A2 (en) * | 2005-07-04 | 2007-01-11 | Koninklijke Philips Electronics N.V. | Stereo dipole reproduction system with tilt compensation. |
| WO2007004147A3 (en) * | 2005-07-04 | 2007-05-03 | Koninkl Philips Electronics Nv | Stereo dipole reproduction system with tilt compensation. |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1341398B1 (en) | 2004-12-15 |
| ES2234938T3 (en) | 2005-07-01 |
| DE50201769D1 (en) | 2005-01-20 |
| ATE285163T1 (en) | 2005-01-15 |
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