WO2011078787A1 - Système de transmission audio - Google Patents

Système de transmission audio Download PDF

Info

Publication number
WO2011078787A1
WO2011078787A1 PCT/SG2009/000489 SG2009000489W WO2011078787A1 WO 2011078787 A1 WO2011078787 A1 WO 2011078787A1 SG 2009000489 W SG2009000489 W SG 2009000489W WO 2011078787 A1 WO2011078787 A1 WO 2011078787A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio
connector
chipset
digital signal
transmitter
Prior art date
Application number
PCT/SG2009/000489
Other languages
English (en)
Inventor
Ser Chin Chua
Eng Joo Joseph Tan
Yeow Fei Koo
Puay Kim Chan
Original Assignee
Avery Technologies (S) Pte Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Avery Technologies (S) Pte Ltd filed Critical Avery Technologies (S) Pte Ltd
Priority to PCT/SG2009/000489 priority Critical patent/WO2011078787A1/fr
Publication of WO2011078787A1 publication Critical patent/WO2011078787A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07—Applications of wireless loudspeakers or wireless microphones

Definitions

  • This invention relates to an audio transmission system and associated audio transmitter and receiver devices.
  • Audio transmission systems for relaying wireless audio signals between devices, such as music players and speakers, are known. There are shortcomings with the known systems, including latency problems, limitation on device numbers, and reliance on specific proprietary transmission standards or protocols limiting consumers to particular manufacturers.
  • Latency in such audio transmission systems refers to the delay necessary for the conversion between analog and digital representations of sound data. Devices such as audio players or computers are only able to process digital sound data. Thus, it is necessary to convert digital music data, such as that stored on a compact disc, to an analog signal before it can be output to speakers. Latency can have a cumulative effect if the data is subject to numerous conversion processes typical in the known standards and protocols.
  • Bluetooth technology uses, radio communication technology known as frequency-hopping spread spectrum transmission. This technology splits the data being sent into chunks and transmits these chunks on up to a number of different frequencies. In its basic mode, Gaussian frequency-shift keying (GFSK) modulation is used. Latency is a problem with Bluetooth technology, especially where a clear audio signal is required at an output, such as a speaker.
  • GFSK Gaussian frequency-shift keying
  • an audio transmission system including:
  • a transmitter device having a body with a protruding audio connector, the transmitter device for connecting to an audio source via the connector to receive an analog audio signal, the transmitter device configured to convert the audio signal to a digital signal, the device having a transmitter for broadcasting the digital signal;
  • the receiver device having a body with a protruding audio connector, the receiver device for connecting to an audio disseminator via the connector, the receiver device configured to receive and convert the digital signal back to the audio signal when in range of the broadcast, and to deliver said audio signal to the audio disseminator for dissemination, wherein the transmitter and receiver devices are paired at manufacture so that the receiver device is only responsive to the digital signal broadcast by the transmitter device.
  • the audio connector includes a TRS audio connector.
  • the TRS connector includes a 3.5mm audio connector jack.
  • the transmitter device is configured to transmit the digital signal according to an IEEE 802.i l standard.
  • the transmitter device is configured to transmit the digital signal without compression.
  • each device includes a rechargeable battery.
  • each device includes an indicator indicative of a charge level of the battery.
  • an audio transmitter device having: ' - '
  • the chipset including analog-to-digital conversion and wireless transmission capabilities
  • an audio connector protruding from the body, said connector for connecting the chipset to an audio source for receiving an analog audio signal;
  • a rechargeable battery inside the housing for providing electrical energy to the chipset, wherein the chipset is configured to convert the analog audio signal to a digital signal and to broadcast the digital signal wirelessly.
  • the audio connector includes a TRS audio connector.
  • the TRS connector includes a 3.5mm audio connector jack.
  • the chipset is configured to transmit the digital signal according to an IEEE 802.11 standard.
  • the chipset is configured to transmit the digital signal without compression.
  • the audio transmitter device includes an indicator indicative of a charge level of the battery.
  • an audio receiver device having:
  • the chipset including digital-to-analog conversion and wireless reception capabilities
  • a rechargeable battery inside the housing for providing electrical energy to the chipset, wherein the chipset is configured to receive a digital audio signal wirelessly, to convert the digital signal to an analog audio signal, and to deliver the analog audio signal to the disseminator for disseminating the analog audio signal.
  • the audio connector includes a TRS audio connector.
  • the TRS connector includes a 3.5mm audio connector jack.
  • the chipset is configured to receive the digital signal according to an IEEE 802.11 standard.
  • the audio receiver device includes an indicator indicative of a charge level of the battery.
  • Figure 1 shows a schematic representation of an audio transmission system
  • Figures 2A to 2G show an example , of an audio transmitter device from different perspectives.
  • Figures 3A to 3G show an example of an audio receiver device from different perspectives.
  • Figure 1 shows an example of an audio transmission system 10 according to the current arrangement.
  • the system 10 is used to wirelessly relay audio signals between an audio source 14, such as a music player or hi-fi system, and audio disseminators 18, such as speakers.
  • an audio source 14 such as a music player or hi-fi system
  • audio disseminators 18, such as speakers such as speakers.
  • different devices may constitute the audio source and the disseminators, such as hand-held audio devices, desktop computer systems, hi-fi audio systems, or the like, depending on requirements and suitability.
  • the audio transmission system 10 generally includes a transmitter device 12 with a suitable audio connector for connecting to the audio source 14.
  • the transmitter device 12 operatively receives an analog audio signal from the audio source 14 and converts the audio signal to a digital signal.
  • the device 12 then broadcasts the digital signal 20, as indicated in Figure 1.
  • the system 10 also includes a number of audio receiver devices 16 each connected to a respective audio disseminator 18 by means of a suitable connector.
  • Each receiver device 16 is configured to receive and convert the digital signal 20 back to the original audio signal when the respective receiving device 16 is in range of the broadcast. The original audio signal is then delivered to the audio disseminator, via the connector, for dissemination.
  • the transmitter and receiver devices 12 and 16 are paired at manufacture so that each receiver device 16 is only responsive to the digital signal 20 broadcast by the transmitter device 12.
  • This pairing typically involves both devices 12 and 16 being assigned a specific frequency band, having an identification code imbedded in the broadcast digital signal to which the receiver devices 16 are uniquely responsive, transmitting of an electronic identifier unique to each system, or any suitable electronic signal identification means whereby the receiver devices 16 are only responsive to a particular transmitter device 12 as is well-known in the art.
  • FIG. 2 shows an example of the audio transmitter device 12.
  • the transmitter device 12 has a body 22 with a chipset housed inside the body 22.
  • the chipset includes suitable analog-to- digital conversion and wireless transmission capabilities to convert the analog audio signal to the digital audio signal 20 and to broadcast the digital signal 20 wirelessly.
  • the transmitter device 12 includes an audio connector 24 protruding from the body 22, the connector 24 for connecting the chipset to the audio source 14 for receiving the analog audio signal, as described above.
  • the audio connector 24 includes a TRS (tip, ring, sleeve) audio connector, which is typically a 3.5mm audio connector jack to enable the transmitter device 12 to connect to a large number of audio source devices as these types of audio jacks are common in the art.
  • TRS tip, ring, sleeve
  • many audio source devices incorporate 3.5mm audio connector technology as this connector 24 is widely used to accommodate headphones and similar devices.
  • different examples of the current arrangement may include different connectors.
  • the chipset is generally configured to transmit the digital signal 20 according to an IEEE 802.11 standard, however other standards may also part of other examples of the current arrangement.
  • the chipset is also configured to transmit the digital signal 20 without compression to reduce the possibility of audio latency between the transmitter and receiver devices 12 and 16.
  • the transmitter device 12 also typically includes a rechargeable battery inside the housing for providing electrical energy to the chipset.
  • a rechargeable battery inside the housing for providing electrical energy to the chipset.
  • one example of the transmitter device 12 includes an indicator indicative of a charge level of the battery, e.g. an LED indicator, etc.
  • FIG. 3 shows an example of the audio receiver device 16.
  • the receiver device 16 is similar to- the transmitter device 12 and includes a body 22 with a chipset housed inside the body 22.
  • the chipset of the receiver device 16 includes digital- to-analog conversion and wireless reception capabilities for receiving the signal 20 from the transmitter device 12.
  • the chipset is generally configured to receive the digital audio signal 20 wirelessly, to convert the digital signal to an analog audio signal, and to deliver the analog audio signal to the respective disseminator 18 for dissemination.
  • the receiver device 16 also has an audio connector 24 protruding from the body 22. The connector 24 is for connecting the chipset of the receiver device 16 to an audio disseminator 18.
  • the audio connector of the receiver device 16 includes a TRS audio connector, which is typically a 3.5mm audio connector jack to allow connecting to a diverse number of different audio disseminators.
  • the chipset of the receiver device 16 is generally configured to receive the digital signal 20 according to an IEEE 802.11 standard. However, as mentioned above, any other suitable standard may be used in further examples of the current arrangement.
  • the receiver device 16 also includes a rechargeable battery inside the housing for providing electrical energy to the chipset.
  • An example of the receiver device 16 includes an indicator indicative of a charge level of the battery, e.g. an LED indicator, etc.
  • each of the devices 12 and 16 also includes an on- off switch 28, a status indicator 26 indicating an operational status of each device, and a USB (universal serial bus) interface 30 whereby the rechargeable battery can be recharged.
  • an on- off switch 28 a status indicator 26 indicating an operational status of each device
  • a USB (universal serial bus) interface 30 whereby the rechargeable battery can be recharged.
  • the current arrangement provides for a system whereby audio signals can be transmitted between an audio source and audio disseminators using the popular 3.5mm audio connector found in many audio devices.
  • the current arrangement also allows for the transmission of uncompressed audio signals with low latency using a single transmitter able to transmit to any number of audio receivers. In this manner, it is possible to connect a number of speakers to a single audio source in a user-friendly manner.
  • the current arrangement provides for a small and user-friendly form factor allowing the connection of a number of different devices in an elegant and inexpensive manner.
  • the transmitter and receiver devices 12 and 16 may be used to connect a smart phone or similar hand-held electronic device with audio capabilities to a home audio system, such as a hi-fi.
  • Many personal audio devices include a 3.5mm audio connector used for connecting stereo headphones to the device.
  • the current arrangement also uses a similar connector to interconnect the transmitter device 12 and the receiver device 16. In this manner, by connecting the transmitter device 12 to the personal audio device and the receiver device 16 to the home audio system, it is possible to play music on the personal audio device through the home audio system.
  • a similar arrangement can be used to wirelessly interconnect an audio system with speakers.
  • Embodiments of the current arrangement are generally described according to an IEEE 802.11 transmission standard which relies on wireless communication in the 2.4, 3.6 and 5 GHz frequency bands.
  • any suitable frequency band can be used depending on design requirements, such as industrial, scientific and medical (ISM) radio bands, or the like.
  • ISM industrial, scientific and medical

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

La présente invention concerne un système de transmission audio qui comprend un dispositif transmetteur qui comporte un corps qui comporte un connecteur audio en saillie. Le dispositif transmetteur est destiné à être connecté à une source audio par l'intermédiaire du connecteur pour recevoir un signal audio analogue, le dispositif transmetteur étant conçu pour convertir le signal audio en un signal numérique. Le dispositif transmetteur comporte un transmetteur pour radiodiffuser le signal numérique. Au moins un dispositif récepteur qui comporte un corps qui comporte un connecteur audio en saillie est également inclus, le dispositif récepteur étant destiné à être connecté à un diffuseur audio par l'intermédiaire du connecteur. Le dispositif récepteur est conçu pour recevoir et reconvertir le signal numérique en signal audio lorsqu'il se trouve au sein de la portée de la radiodiffusion, et pour distribuer ledit signal audio au diffuseur audio pour la diffusion. Les dispositifs transmetteur et récepteur sont appariés lors de la fabrication pour que le dispositif récepteur réponde seulement à la radiodiffusion de signal numérique par le dispositif transmetteur. La présente invention concerne également les dispositifs transmetteur et récepteur associés.
PCT/SG2009/000489 2009-12-23 2009-12-23 Système de transmission audio WO2011078787A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SG2009/000489 WO2011078787A1 (fr) 2009-12-23 2009-12-23 Système de transmission audio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2009/000489 WO2011078787A1 (fr) 2009-12-23 2009-12-23 Système de transmission audio

Publications (1)

Publication Number Publication Date
WO2011078787A1 true WO2011078787A1 (fr) 2011-06-30

Family

ID=44196044

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2009/000489 WO2011078787A1 (fr) 2009-12-23 2009-12-23 Système de transmission audio

Country Status (1)

Country Link
WO (1) WO2011078787A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20110974A1 (it) * 2011-10-27 2013-04-28 Add On Technology Co Ltd Dispositivo senza fili per ricevere ed inoltrare un segnale audio
CN112346701A (zh) * 2020-11-06 2021-02-09 刘延黄 一种桌面台式无线直播声卡设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6636749B2 (en) * 2001-06-25 2003-10-21 At&T Wireless Services, Inc. Method and apparatus for providing power and wireless protocol capability to a wireless device, such as a wireless phone
US20050026559A1 (en) * 2003-07-01 2005-02-03 Robert Khedouri Method and apparatus for wirelessly transferring music and other audio content to a car stereo or home stereo
US20080167738A1 (en) * 2007-01-05 2008-07-10 Telechips, Inc. Media connect device, and system using the same
US20080279390A1 (en) * 2001-12-21 2008-11-13 Woolfork C Earl Wireless Digital Audio Music System

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6636749B2 (en) * 2001-06-25 2003-10-21 At&T Wireless Services, Inc. Method and apparatus for providing power and wireless protocol capability to a wireless device, such as a wireless phone
US20080279390A1 (en) * 2001-12-21 2008-11-13 Woolfork C Earl Wireless Digital Audio Music System
US20050026559A1 (en) * 2003-07-01 2005-02-03 Robert Khedouri Method and apparatus for wirelessly transferring music and other audio content to a car stereo or home stereo
US20080167738A1 (en) * 2007-01-05 2008-07-10 Telechips, Inc. Media connect device, and system using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20110974A1 (it) * 2011-10-27 2013-04-28 Add On Technology Co Ltd Dispositivo senza fili per ricevere ed inoltrare un segnale audio
US20130108072A1 (en) * 2011-10-27 2013-05-02 Add-On Technology Co., Ltd. Wireless Device for Receiving and Forwarding an Audio Signal
CN103096219A (zh) * 2011-10-27 2013-05-08 一象科技股份有限公司 用于接收和转发音频信号的无线设备
CN112346701A (zh) * 2020-11-06 2021-02-09 刘延黄 一种桌面台式无线直播声卡设备

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