WO2006032978A3 - A method and apparatus for ensuring high quality audio playback in a wireless or wired digital audio communication system - Google Patents

A method and apparatus for ensuring high quality audio playback in a wireless or wired digital audio communication system Download PDF

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Publication number
WO2006032978A3
WO2006032978A3 PCT/IB2005/002783 IB2005002783W WO2006032978A3 WO 2006032978 A3 WO2006032978 A3 WO 2006032978A3 IB 2005002783 W IB2005002783 W IB 2005002783W WO 2006032978 A3 WO2006032978 A3 WO 2006032978A3
Authority
WO
WIPO (PCT)
Prior art keywords
digital data
data
transmitter
symbols
management unit
Prior art date
Application number
PCT/IB2005/002783
Other languages
French (fr)
Other versions
WO2006032978A2 (en
Inventor
Beng Huat Chua
Original Assignee
Freesystems Pte Ltd
Beng Huat Chua
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 Freesystems Pte Ltd, Beng Huat Chua filed Critical Freesystems Pte Ltd
Priority to EP05788784A priority Critical patent/EP1797665A4/en
Priority to JP2007532980A priority patent/JP2008514148A/en
Publication of WO2006032978A2 publication Critical patent/WO2006032978A2/en
Publication of WO2006032978A3 publication Critical patent/WO2006032978A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
    • H04J3/0632—Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • 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

Abstract

A communication system synchronizes data received and recovered from a transmission medium to the data transmitted such the there is neither under-run nor overrun of the data due to differences in the transmission and reception timing. The data communication system has a transmitter (100) and a receiver (200). The transmitter (100) encodes digital data into series of symbols and transmits a modulated signal composed of the series of symbols. The receiver (200) acquires the modulated signal, restoring the modulated signal, reconstructing the symbols of the digital data from the modulated signal and synchronizing the digital data to a first reference signal. The digital data is transferred to a buffer data retention circuit. The digital data is transferred from the buffer retention circuit to a jitter management unit (235). A boundary marker signal detection circuit extracts a marker signal indicating a boundary of symbols of the digital data to provide an indication of the timing of the digital data as broadcasted by the transmitter (100). A jitter management unit (235) synchronizes the digital data to the first reference signal. The jitter management unit (235) has a FIFO buffer (236) to receive the reconstructed digital data at the rate of the first reference signal from the buffer retention circuit and transmits the synchronized digital data at a rate approximating the timing of the transmitter (100). The jitter management unit (235) synchronizes the digital data by monitoring the level of the digital data present within the FIFO buffer (236) and adjusting the consumption of the digital data from the FIFO buffer (236).
PCT/IB2005/002783 2004-09-22 2005-09-21 A method and apparatus for ensuring high quality audio playback in a wireless or wired digital audio communication system WO2006032978A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05788784A EP1797665A4 (en) 2004-09-22 2005-09-21 A method and apparatus for ensuring high quality audio playback in a wireless or wired digital audio communication system
JP2007532980A JP2008514148A (en) 2004-09-22 2005-09-21 Method and apparatus for realizing high quality audio playback in a wireless or wired digital audio communication system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61200704P 2004-09-22 2004-09-22
US60/612,007 2004-09-22

Publications (2)

Publication Number Publication Date
WO2006032978A2 WO2006032978A2 (en) 2006-03-30
WO2006032978A3 true WO2006032978A3 (en) 2006-12-28

Family

ID=36090381

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/002783 WO2006032978A2 (en) 2004-09-22 2005-09-21 A method and apparatus for ensuring high quality audio playback in a wireless or wired digital audio communication system

Country Status (5)

Country Link
EP (1) EP1797665A4 (en)
JP (1) JP2008514148A (en)
KR (1) KR20070085235A (en)
TW (1) TWI304694B (en)
WO (1) WO2006032978A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005086435A1 (en) * 2004-03-05 2005-09-15 Xyratex Technology Limited A method for congestion management of a network, a signalling protocol, a switch, an end station and a network
US8081626B2 (en) * 2006-07-19 2011-12-20 4472314 Canada Inc. Expedited communication traffic handling apparatus and methods
DE102009031995A1 (en) * 2009-07-06 2011-01-13 Neutrik Aktiengesellschaft Method for the wireless real-time transmission of at least one audio signal
US8577209B2 (en) * 2010-06-15 2013-11-05 Mediatek Inc. Method for utilizing at least one storage space sharing scheme to manage storage spaces utilized by video playback operation and related video playback apparatus thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312361A (en) * 1996-04-19 1997-10-22 Nec Corp Symbol synchronisation method and apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6188496B1 (en) * 1997-11-25 2001-02-13 International Business Machines Corporation Wireless communication system
US6400683B1 (en) * 1998-04-30 2002-06-04 Cisco Technology, Inc. Adaptive clock recovery in asynchronous transfer mode networks
US6741659B1 (en) * 1999-10-25 2004-05-25 Freesystems Pte. Ltd. Wireless infrared digital audio transmitting system
JP3417392B2 (en) * 2000-09-08 2003-06-16 ヤマハ株式会社 Synchronous control device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312361A (en) * 1996-04-19 1997-10-22 Nec Corp Symbol synchronisation method and apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GOMES J. ET AL.: "An overview of the ASIMOV acoustic communication system", OCEANS 2000 MTS/IEEE CONFERENCE AND EXHIBITION, PISCATAWAY, NJ, USA, 11 September 2000 (2000-09-11) - 14 September 2000 (2000-09-14), pages 1633 - 1637, XP010521110 *
See also references of EP1797665A4 *

Also Published As

Publication number Publication date
KR20070085235A (en) 2007-08-27
EP1797665A4 (en) 2010-05-26
WO2006032978A2 (en) 2006-03-30
TWI304694B (en) 2008-12-21
JP2008514148A (en) 2008-05-01
EP1797665A2 (en) 2007-06-20
TW200625903A (en) 2006-07-16

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