GB201020047D0 - Audio playback device - Google Patents

Audio playback device

Info

Publication number
GB201020047D0
GB201020047D0 GBGB1020047.5A GB201020047A GB201020047D0 GB 201020047 D0 GB201020047 D0 GB 201020047D0 GB 201020047 A GB201020047 A GB 201020047A GB 201020047 D0 GB201020047 D0 GB 201020047D0
Authority
GB
United Kingdom
Prior art keywords
sample rate
input buffer
clock signal
audio data
digital audio
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GBGB1020047.5A
Other versions
GB2485977A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DisplayLink UK Ltd
Original Assignee
DisplayLink UK 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 DisplayLink UK Ltd filed Critical DisplayLink UK Ltd
Priority to GB1020047.5A priority Critical patent/GB2485977A/en
Publication of GB201020047D0 publication Critical patent/GB201020047D0/en
Publication of GB2485977A publication Critical patent/GB2485977A/en
Withdrawn legal-status Critical Current

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
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/05—Electric or magnetic storage of signals before transmitting or retransmitting for changing the transmission rate
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/04—Time compression or expansion
    • G10L21/043—Time compression or expansion by changing speed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams
    • H04N21/4392—Processing of audio elementary streams involving audio buffer management
    • G06F2003/0691—
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0656—Data buffering arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
    • H04L7/002—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation
    • H04L7/0029—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation interpolation of received data signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Hardware Design (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

An audio playback system comprises an input buffer 20, a loop control unit 22, a sample rate converter 24, a DAC 26 and a clock generating component 28. The input buffer is arranged to store digital audio data received over a packet network. The loop control unit is arranged to monitor the level of the input buffer and to generate a local clock signal accordingly. The sample rate converter is arranged to receive digital audio data from the input buffer, to receive the local clock signal from the loop control unit and to adjust the sample rate of the digital audio data. The DAC is arranged to receive digital audio data from the sample rate converter and to output analogue audio. The clock generating component is arranged to generate a destination clock signal and to provide the destination clock signal to the sample rate converter.
GB1020047.5A 2010-11-26 2010-11-26 Audio playback system Withdrawn GB2485977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1020047.5A GB2485977A (en) 2010-11-26 2010-11-26 Audio playback system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1020047.5A GB2485977A (en) 2010-11-26 2010-11-26 Audio playback system

Publications (2)

Publication Number Publication Date
GB201020047D0 true GB201020047D0 (en) 2011-01-12
GB2485977A GB2485977A (en) 2012-06-06

Family

ID=43500668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1020047.5A Withdrawn GB2485977A (en) 2010-11-26 2010-11-26 Audio playback system

Country Status (1)

Country Link
GB (1) GB2485977A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3472806A4 (en) 2016-06-17 2020-02-26 Immersive Robotics Pty Ltd Image compression method and apparatus
US11429337B2 (en) 2017-02-08 2022-08-30 Immersive Robotics Pty Ltd Displaying content to users in a multiplayer venue
AU2018280337B2 (en) 2017-06-05 2023-01-19 Immersive Robotics Pty Ltd Digital content stream compression
TW201935927A (en) 2017-11-21 2019-09-01 澳大利亞商伊門斯機器人控股有限公司 Frequency component selection for image compression
CN111699693A (en) 2017-11-21 2020-09-22 因默希弗机器人私人有限公司 Image compression for digital reality
WO2024020186A1 (en) * 2022-07-21 2024-01-25 Shure Acquisition Holdings, Inc. Communications between networked audio devices

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6598172B1 (en) * 1999-10-29 2003-07-22 Intel Corporation System and method for clock skew compensation between encoder and decoder clocks by calculating drift metric, and using it to modify time-stamps of data packets
US7650285B2 (en) * 2004-06-25 2010-01-19 Numerex Corporation Method and system for adjusting digital audio playback sampling rate
US7620137B2 (en) * 2004-11-13 2009-11-17 Microsoft Corporation System and method for clock drift correction for broadcast audio/video streaming
US20060221936A1 (en) * 2005-03-31 2006-10-05 Rauchwerk Michael D Timing recovery for modem transmission on IP networks
US7885297B2 (en) * 2008-07-03 2011-02-08 Himax Technologies Limited Synchronization devices and methods

Also Published As

Publication number Publication date
GB2485977A (en) 2012-06-06

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20121004 AND 20121010

WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)