AU2007202880A1 - Bluetooth transmission facility for hearing devices, and corresponding transmission method - Google Patents
Bluetooth transmission facility for hearing devices, and corresponding transmission method Download PDFInfo
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- AU2007202880A1 AU2007202880A1 AU2007202880A AU2007202880A AU2007202880A1 AU 2007202880 A1 AU2007202880 A1 AU 2007202880A1 AU 2007202880 A AU2007202880 A AU 2007202880A AU 2007202880 A AU2007202880 A AU 2007202880A AU 2007202880 A1 AU2007202880 A1 AU 2007202880A1
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- transmission
- hearing device
- bluetooth
- data
- audio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
- H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
- H04R25/558—Remote control, e.g. of amplification, frequency
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Description
S&FRef: 812754
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address of Applicant Actual Inventor(s): Address for Service: Invention Title: Siemens Audiologische Technik GmbH, of Gebbertstrasse 125, 91058, Erlangen, Germany Thomas Lotter, Jirgen Reithinger Spruson Ferguson St Martins Tower Level 31 Market Street Sydney NSW 2000 (CCN 3710000177) Bluetooth transmission facility for hearing devices, and corresponding transmission method The following statement is a full description of this invention, including the best method of performing it known to me/us:- 5845c(837969_1) -1- BLUETOOTH TRANSMISSION FACILITY FOR HEARING DEVICES, AND CORRESPONDING TRANSMISSION METHOD 00 The present invention relates to a transmission facility for transmitting audio data to a 00 hearing device, with a transmission device for sending audio data in a Bluetooth signal, a Scoder which is integrated into the transmission device, for compressing the audio data before its transmission and a relay station for converting the Bluetooth signal from the transmission device into a signal for inductive transmission to the hearing device.
Furthermore, the present invention relates to a corresponding method for transmitting audio data to a hearing device.
There is an ever increasing need for the wireless broadband transmission of audio data for speech or music, from televisions or hi-fi devices, to hearing devices. In particular, transmission should also be possible to a hearing device system with two hearing devices, for the binaural supply.
For the purpose of cordless audio transmission to hearing devices, use is made mainly of FM or infrared devices. These are devices which are worn in place of a hearing device, which are offered as plug-on modules for hearing devices or which are integrated into a hearing device with the need for significant additional space.
For audio transmission, several electromagnetic transmission paths can basically be considered. Thus it is possible, for example, to make use of high-frequency far-field transmission systems and inductive near-field transmission systems. By using a digital, inductive transmission system, it is possible to cover short distances (less than 1 to 2 m) to a hearing device with a saving of space and power. However, for audio transmissions from televisions or hi-fi systems, sensible operation requires a far-field transmission system for larger distances (range approx. 10 m).
From the post-published patent application DE 10 2005 005 603.2, a data transmission facility for wireless transmissions to a hearing device is known, which contains a highfrequency receiving device for receiving a high-frequency, modulated signal from an 3s external transmission unit. A mixing device is used to mix the high-frequency modulated signal with a reference signal of a similarly high frequency, so that a modulated output 833385 i.DOC signal can be generated, the carrier frequency of which is at least one order of magnitude ;lower, and which is suitable for inductive transmission. Finally, the output signal is transmitted inductively to the hearing device by a transmission device. This conversion Smethod results in a minimal delay time over the entire radio link, because it omits completely any demodulation and decoding plus re-modulation and re-encoding. However, 00 a disadvantage of this transmission is that the entire radio link must be individually 0established, because the data transmission rate in the high-frequency transmission section Sand the data transmission rate in the section using inductive transmission must be individually adjusted.
Thus, a need exists to provide a transmission facility and a corresponding transmission method which involves lower development costs.
Disclosed herein is a transmission facility for the transmission of audio data to a hearing is device with a transmission device for transmitting the audio data in a Bluetooth signal, a coder which is integrated into the transmission device, for compressing the audio data before its transmission, and a relay station for converting the Bluetooth signal from the transmission device into a signal for inductive transmission to the hearing device, such that when the conversion is carried out in the relay station no recoding is performed, the transmission device transmits in accordance with the Bluetooth A2DP protocol, and the coder works at a lower sampling rate than a standard A2DP coder.
Correspondingly, in accordance with the present disclosure, a method is also proposed for the transmission of audio data to a hearing device by the encoding of the audio data, transmission of the audio data to a relay station in a Bluetooth signal and conversion of the Bluetooth signal into a signal for inductive transmission to the hearing device, such that no encoding is performed during the conversion, the transmission is effected in accordance with the Bluetooth A2DP protocol and the encoding is performed with a lower sampling rate than for a standard A2DP coder because it is the hearing device clock-pulse rate.
It is thus advantageously possible to make use of standardized components such as Bluetooth transmitters and Bluetooth receivers, together with the appropriate Bluetooth transmission protocol. The standardized components of the BT transmission system are tailored for audio applications error protection).
833385_ i.DOC -3- The transmission of data in accordance with an embodiment of the invention can if ;necessary be bidirectional. It is thus also possible for data from the hearing device to be communicated to an external device over the partially standardized transmission link.
The relay station will preferably be integrated into a remote control for the hearing device 00 or hearing devices, as applicable, or possibly even into a television remote control, for 0example. The user would thereby not need an additional device for the wireless data transmission.
l0 It is expedient if the audio bandwidth after the compression by the coder is less than kHz. In particular, the audio bandwidth will lie between 8 and 12 kHz. By this means, the audio stream will be compressed as far back as the transmission side in such a way that no unprocessable data arrives at the hearing device.
It is further advantageous if the data transmission rate for the Bluetooth signal is under 150 kbit/s. This means that no special compression must be effected for an inductive transmission in the baseband.
The present invention will now be explained in more detail by reference to the attached drawings, which show: FIG 1 a transmission system with a relay station for decoding and re-encoding, FIG 2 a transmission system in accordance with an embodiment of the invention, with a relay station and no re-encoding.
The exemplary embodiment outlined in more detail below represents a preferred form of embodiment of the present invention. However, so that the invention can be better understood, a transmission system in accordance with the prior art as known internally, which is shown schematically in FIG 1, will first be explained.
As shown for the system in FIG 1, a stereo audio signal 1 is to be transmitted from a television or from a hi-fi system to a hearing device or a hearing device system for binaural feed, as applicable. The audio signals 1 are sampled and encoded in a Bluetooth transmitter 3. During this encoding, the data is compressed and combined in blocks. The Bluetooth transmitter 3 supports several standard coders, of which one coder 4 can optionally be used 833385_1.DOC for the transmission. In Bluetooth A2DP the audio signal 1 is typically sampled at 44.1 or ;48 kHz, so that an audio bandwidth of 20 to 24 kHz results for the transmitted signal. The data transmission rate rbt is typically 230 to 350 kbit/s. The standard Bluetooth transmission link 5 permits wireless communication over a range of up to approx. 10 m.
00 A standard Bluetooth receiver with a compatible Bluetooth decoder 7 is arranged in a 00 remote control 6, in order to decode the encoded audio data on the Bluetooth transmission Slink 5. For the subsequent inductive transmission to the hearing device system 2, the data transmission rate must be reduced to the value rhg. For this reason, a hearing device coder 8 is provided, in the remote control 6, which reduces the data transmission rate appropriately and supplies an audio bandwidth of 8 to 10 kHz. Encoded in this way, the data is sent over the inductive transmission link 9 to the hearing device system 2. Each hearing device in the hearing device system 2 has an appropriate hearing device decoder 11.
Thus, the greater distance from a television or a hi-fi system to the hearing device can be bridged with minimal effort and at minimal costs by using a standard transmission method to a hearing device remote control. The Bluetooth method is used as the standard transmission method, this representing the most widespread standard for cordless stereo audio transmissions within a house. The "last yard" from the remote control to the hearing device is then bridged inductively.
In concrete terms, the audio signal is digitized in the Bluetooth transmission station 3 and, using the standardized audio transmission protocol A2DP, is transmitted to the relay station, namely the remote control 6. This standard protocol stipulates support for a license-free codec, namely SBC. As well as this, other defined codecs can also be used, e.g. MP3, although these are not suitable for TV operation (because of the high algorithmic delay). In addition, the standard offers the possibility of defining/using a manufacturerdependent codec.
As already mentioned above, comparatively high data volumes are transmitted according to the standard on the Bluetooth link 5. For SBC, the data transmission rate is r bt 230 to 350 kbit/s. However, the transmission to the hearing devices should be effected with the smallest possible components and saving as much current as possible. For this reason, an inductive transmission link 9 is selected here, for which however the data transmission rate must be reduced in order to increase the efficiency and to permit a corresponding power 833385_1.DOC saving. The data reduction is effected by the recoding of the Bluetooth A2DP data stream ;to a hearing device data stream in the relay station or the remote control 6, as applicable.
SThe solution depicted in FIG 1 for the wireless radio transmission link does, however, have some disadvantages. On the one hand, the Bluetooth data transmission in accordance with 00 the standard with its high bandwidth is inefficient for operation with a hearing device. The 0reason for this lies in the fact that, because of different quality requirements, hearing Sdevices are normally operated with a lower audio bandwidth (approximately 8 to 10 kHz) than audio applications for those with normal hearing (greater than 20 kHz). In addition to this, the recoding in the relay station leads to a reduced audio quality, and produces an increased current consumption, as a result of which the endurance of the relay station is reduced. A further disadvantage consists in the fact that the delay time for speech and music, from the television to the hearing device, is increased, because of the duplicated encoding delay (long audio blocks on the Bluetooth link) and the processing delays of the remote control. This must be considered critical in that synchronicity ought to be ensured between the audio transmission, from the television to the hearing device, and the images, and that the overlaying of direct sound from the television by the transmitted audio signal produces an unwanted coloration or echoing of the music or speech signal.
In accordance with the present disclosure therefore, the system which is illustrated in principle in FIG 2 is used. In a transmission station 13, the TV or hi-fi signal 1 is transposed with the aid of a hearing device coder 14 into a desired hearing device format.
This is distinguished by an audio bandwidth of 8 to 10 kHz. Apart from this, the signal is so encoded by the hearing device coder 14 as to produce a data rate rhg which is suitable for the following inductive transmission link. This is realized by an appropriate block length for the data blocks.
The hearing device coder 14 by which the stereo signal is, after digitization, compressed with a hearing device sampling rate, acts as an alternative to the SBC coder, conforming to the standard, in the Bluetooth A2DP application. The SBC can also be supported in the transmitter, but is not used for the hearing device application. The remaining part of the physical transmission according to the Bluetooth A2DP protocol can be applied without change for the Bluetooth transmission link In the remote control 16, the Bluetooth data stream is received in the hearing device format by a standard Bluetooth receiver, and can be passed on to an inductive transmitter in the remote control 16 without recoding or conversion of the digital sampling rate. The 833385_ i.DOC Bluetooth receiver and the inductive transmitter are therefore symbolized in FIG 2 as a ;bypass 17. The remaining data transmission link, namely the inductive transmission link 9 together with the hearing device system 2 with the hearing device coders 10 and 11, corresponds to that of FIG 1. Thus, for the entire transmission shown in FIG 2 the payload data rate and the clock rate on the Bluetooth link 15 correspond to that on the inductive 00 transmission link 9, i.e. r_bt rhg.
00 SBecause the Bluetooth standard is used, the major part of the transmission link to the hearing device frame can be simply and cost-effectively realized, with little development io work. The "last yard" to the hearing device is effected in a particularly energy-saving way by means of the inductive link 9. The relocation of the hearing device coder and the sampling at the hearing device clock rate in the Bluetooth transmission station 13 brings the following advantages: a) The efficiency can be raised in the transmission station and in the remote control.
Namely, the Bluetooth transmission in accordance with the A2DP protocol can be carried out at a significantly lower data transmission rate than in the standard application using SBC. This will lower the current consumption in the transmission and relay station. Apart from which, the demanding recoding in the remote control no longer takes place, which leads to further current savings. Hence a longer battery between-charge time or less frequent battery change, as applicable, can be achieved.
b) Because both Bluetooth codec (coding/decoding) and also hearing device codec represent transformations with losses, the audio quality of the overall signal is raised, because in the system in accordance with the embodiment of the invention shown in FIG 2 it is only necessary to encode/decode once.
c) An important quality attribute of the overall system is the delay of the audio signal due to the transmission. On the one hand, in the TV application direct sound from the television is overlaid at the hearing device wearer's ear with the signal transmitted by radio, which leads to annoying coloration or echoing. On the other hand, it is necessary to ensure the synchronicity of the image with the sound. With the method in accordance with an embodiment of the invention, the delay time is minimized by the elimination of an encoding delay and a processing delay in the remote control.
833385 .DOC
Claims (12)
1. A transmission facility for the transmission of audio data to a hearing device, comprising: a transmission device for transmitting the audio data in a Bluetooth signal, said 00 transmission device transmitting according to the Bluetooth A2DP protocol; 0a coder, which is integrated into the transmission device, for compressing the audio (N Sdata before its transmission, said coder working at a lower sampling rate than the standard A2DP coder; and a relay station for converting the Bluetooth signal from the transmission device into a signal for inductive transmission to the hearing device, wherein no recoding is performed in the relay station during the conversion.
2. The transmission facility as claimed in claim 1, wherein data can be transmitted bidirectionally.
3. The transmission facility as claimed in either one of claims 1 and 2, wherein the relay station is integrated into a remote control.
4. The transmission facility as claimed in any one of the preceding claims, wherein the audio bandwidth after compression by the coder is less than 15 kHz.
The transmission facility as claimed in claim 4, wherein the audio bandwidth lies between 8 and 12 kHz.
6. The transmission facility as claimed in any one of the preceding claims, wherein the data transmission rate in the Bluetooth signal is below 150 kbit/s.
7. A method for transmitting audio data to a hearing device, comprising the steps of: encoding the audio data, said encoding being performed using a lower sampling rate than for a standard A2DP coder; transmitting the audio data to a relay station in a Bluetooth signal, said transmission being effected in accordance with the Bluetooth A2DP protocol; and converting the Bluetooth signal into a signal for inductive transmission to the hearing device, wherein no recoding is performed during the conversion. 833385_.DOC
8. The method as claimed in claim 7, wherein the data can be transmitted Sbidirectionally.
9. The method as claimed in either one of claims 7 and 8, wherein the audio bandwidth after encoding is less than 15 kHz. 0 00
10. The method as claimed in any one of claims 7 to 9, wherein the data transmission 0 rate in the Bluetooth signal is below 150 kbit/s.
11. A transmission facility for the transmission of audio data to a hearing device, said transmission facility being substantially as described herein with reference to the accompanying drawings.
12. A method for transmitting audio data to a hearing device, said method being substantially as described herein with reference to the accompanying drawings. DATED this Nineteenth Day of June, 2007 Siemens Audiologische Technik GmbH Patent Attorneys for the Applicant SPRUSON FERGUSON 833385_1.DOC
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200610029196 DE102006029196B4 (en) | 2006-06-26 | 2006-06-26 | Bluetooth transmission device for hearing aids and corresponding transmission method |
| DE102006029196.4 | 2006-06-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2007202880A1 true AU2007202880A1 (en) | 2008-01-17 |
| AU2007202880B2 AU2007202880B2 (en) | 2009-07-23 |
Family
ID=38510328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007202880A Ceased AU2007202880B2 (en) | 2006-06-26 | 2007-06-21 | Bluetooth transmission facility for hearing devices, and corresponding transmission method |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1874088B1 (en) |
| JP (1) | JP4749390B2 (en) |
| CN (1) | CN101098168B (en) |
| AU (1) | AU2007202880B2 (en) |
| DE (1) | DE102006029196B4 (en) |
| DK (1) | DK1874088T3 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217038B (en) * | 2008-01-17 | 2011-06-22 | 中兴通讯股份有限公司 | An encoding method of audio data SBC algorithm and Bluetooth stereo subsystem |
| DE102008019107A1 (en) | 2008-04-16 | 2009-10-29 | Siemens Medical Instruments Pte. Ltd. | Measuring device for measuring input and output characteristics of hearing device, has measuring chamber for holding hearing device, where high-frequency transmission module is provided for transmitting measuring signal |
| DE102008050351A1 (en) | 2008-10-02 | 2010-04-08 | Siemens Medical Instruments Pte. Ltd. | System for transmitting audio data to hearing aid, has transmitter unit for emitting radio signal with audio data, where delay unit is provided for delaying audio data released by acoustic waves by predetermined delay value |
| JP5342720B2 (en) * | 2009-03-24 | 2013-11-13 | パナソニック株式会社 | Audio image reproduction system, hearing aid, audio image processing apparatus |
| DE102014204557A1 (en) * | 2014-03-12 | 2015-09-17 | Siemens Medical Instruments Pte. Ltd. | Transmission of a wind-reduced signal with reduced latency |
| CN106792466B (en) * | 2016-12-26 | 2020-10-09 | 歌尔科技有限公司 | Method for communication between equipment end and host end |
| CN108271144B (en) * | 2018-03-23 | 2023-12-19 | 杜宁 | Bluetooth device and system for carrying out data bidirectional mutual transmission with terminal |
| CN108738006B (en) * | 2018-05-31 | 2021-06-25 | 出门问问信息科技有限公司 | Data transmission method and device based on Bluetooth |
| CN108966197A (en) * | 2018-08-20 | 2018-12-07 | 南昌黑鲨科技有限公司 | Audio frequency transmission method, system, audio-frequence player device and computer readable storage medium based on bluetooth |
| CN111050306A (en) * | 2018-10-15 | 2020-04-21 | 北京轩辕联科技有限公司 | Extended connection method and extended connection system for Bluetooth device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6208740B1 (en) * | 1997-02-28 | 2001-03-27 | Karl Grever | Stereophonic magnetic induction sound system |
| US6690657B1 (en) * | 2000-02-25 | 2004-02-10 | Berkeley Concept Research Corporation | Multichannel distributed wireless repeater network |
| AT411950B (en) * | 2001-04-27 | 2004-07-26 | Ribic Gmbh Dr | METHOD FOR CONTROLLING A HEARING AID |
| KR20040028638A (en) * | 2001-07-30 | 2004-04-03 | 소니 가부시끼 가이샤 | Radio communication system, radio communication control apparatus, radio communication control method, recording medium, and computer program |
| FR2829650B1 (en) * | 2001-09-13 | 2004-07-09 | Cit Alcatel | INTER-NETWORK GATEWAY FOR DIGITAL SIGNAL TRANSMISSION |
| US20030114103A1 (en) * | 2001-12-19 | 2003-06-19 | Radio Frequency Systems, Inc. | Repeater for use in a wireless communication system |
| DE10200796A1 (en) * | 2002-01-11 | 2003-07-31 | Reinhard Dagefoerde | Accessory for hearing aid is short-range data radio receiver, especially Bluetooth receiver, whose output can be connected to audio connection of hearing aid |
| JP3754423B2 (en) * | 2003-03-11 | 2006-03-15 | 株式会社東芝 | Electronic equipment and programs |
| GB0406091D0 (en) * | 2004-03-17 | 2004-04-21 | Koninkl Philips Electronics Nv | Radio repeater |
| WO2006023857A1 (en) | 2004-08-18 | 2006-03-02 | Micro Ear Technology, Inc. D/B/A Micro-Tech | Method and apparatus for wireless communication using an inductive interface |
| DE102005005603A1 (en) * | 2005-02-07 | 2006-08-17 | Siemens Audiologische Technik Gmbh | Data transmission device for wireless data transmission for hearing aids and corresponding method |
-
2006
- 2006-06-26 DE DE200610029196 patent/DE102006029196B4/en active Active
-
2007
- 2007-05-24 EP EP07108797.7A patent/EP1874088B1/en active Active
- 2007-05-24 DK DK07108797.7T patent/DK1874088T3/en active
- 2007-06-21 JP JP2007163876A patent/JP4749390B2/en active Active
- 2007-06-21 AU AU2007202880A patent/AU2007202880B2/en not_active Ceased
- 2007-06-26 CN CN2007101262745A patent/CN101098168B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101098168A (en) | 2008-01-02 |
| AU2007202880B2 (en) | 2009-07-23 |
| EP1874088A2 (en) | 2008-01-02 |
| EP1874088B1 (en) | 2015-07-08 |
| CN101098168B (en) | 2012-10-24 |
| DE102006029196A1 (en) | 2007-12-27 |
| DK1874088T3 (en) | 2015-10-12 |
| DE102006029196B4 (en) | 2009-12-10 |
| EP1874088A3 (en) | 2011-05-25 |
| JP2008011527A (en) | 2008-01-17 |
| JP4749390B2 (en) | 2011-08-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| HB | Alteration of name in register |
Owner name: SIVANTOS GMBH Free format text: FORMER NAME(S): SIEMENS AUDIOLOGISCHE TECHNIK GMBH |
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| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |