TW200625903A - 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

Info

Publication number
TW200625903A
TW200625903A TW094132495A TW94132495A TW200625903A TW 200625903 A TW200625903 A TW 200625903A TW 094132495 A TW094132495 A TW 094132495A TW 94132495 A TW94132495 A TW 94132495A TW 200625903 A TW200625903 A TW 200625903A
Authority
TW
Taiwan
Prior art keywords
digital data
data
symbols
management unit
transmitter
Prior art date
Application number
TW094132495A
Other languages
Chinese (zh)
Other versions
TWI304694B (en
Inventor
Beng-Huat Chua
Original Assignee
Free Systems 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 Free Systems Pte Ltd filed Critical Free Systems Pte Ltd
Publication of TW200625903A publication Critical patent/TW200625903A/en
Application granted granted Critical
Publication of TWI304694B publication Critical patent/TWI304694B/en

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

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 and a receiver. The transmitter encodes digital data into series of symbols and transmits a modulated signal composed of the series of symbols. The receiver 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. 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. A jitter management unit synchronizes the digital data to the first reference signal. The jitter management unit has a FIFO buffer 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. The jitter management unit synchronizes the digital data by monitoring the level of the digital data present within the FIFO buffer and adjusting the consumption of the digital data from the FIFO buffer.
TW094132495A 2004-09-22 2005-09-20 A method and apparatus for ensuring high quality audio playback in a wireless or wired digital audio communication system TWI304694B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61200704P 2004-09-22 2004-09-22

Publications (2)

Publication Number Publication Date
TW200625903A true TW200625903A (en) 2006-07-16
TWI304694B TWI304694B (en) 2008-12-21

Family

ID=36090381

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094132495A TWI304694B (en) 2004-09-22 2005-09-20 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI428017B (en) * 2010-06-15 2014-02-21 Mediatek Inc Method for managing a first storage space and a second storage space

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1728366B1 (en) * 2004-03-05 2007-12-05 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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09284270A (en) * 1996-04-19 1997-10-31 Nec Corp Symbol synchronization tracking method and symbol synchronization tracking device adopting it
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI428017B (en) * 2010-06-15 2014-02-21 Mediatek Inc Method for managing a first storage space and a second storage space

Also Published As

Publication number Publication date
EP1797665A4 (en) 2010-05-26
JP2008514148A (en) 2008-05-01
WO2006032978A3 (en) 2006-12-28
WO2006032978A2 (en) 2006-03-30
KR20070085235A (en) 2007-08-27
TWI304694B (en) 2008-12-21
EP1797665A2 (en) 2007-06-20

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees