WO2013186561A3 - Doubly compatible lossless audio bandwidth extension - Google Patents

Doubly compatible lossless audio bandwidth extension Download PDF

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Publication number
WO2013186561A3
WO2013186561A3 PCT/GB2013/051548 GB2013051548W WO2013186561A3 WO 2013186561 A3 WO2013186561 A3 WO 2013186561A3 GB 2013051548 W GB2013051548 W GB 2013051548W WO 2013186561 A3 WO2013186561 A3 WO 2013186561A3
Authority
WO
WIPO (PCT)
Prior art keywords
bandwidth extension
encoder
audio bandwidth
lossless audio
sampling rate
Prior art date
Application number
PCT/GB2013/051548
Other languages
French (fr)
Other versions
WO2013186561A2 (en
Inventor
Peter Graham Craven
Malcolm Law
John Robert Stuart
Original Assignee
Meridian Audio Limited
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
Priority to GB1210373.5 priority Critical
Priority to GBGB1210373.5A priority patent/GB201210373D0/en
Application filed by Meridian Audio Limited filed Critical Meridian Audio Limited
Publication of WO2013186561A2 publication Critical patent/WO2013186561A2/en
Publication of WO2013186561A3 publication Critical patent/WO2013186561A3/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/0017—Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1806—Pulse code modulation systems for audio signals

Abstract

An encoder for digital audio signals at a higher sample rate creates a stream for consumer distribution at a lower sampling rate, with compatibility for standard PCM players without a decoder. In conjunction with a suitable decoder, two enhanced playback options are supported, the first option allowing full lossless reconstruction of a noise-shaped higher sampling rate signal, the second option allowing lossy bandwidth extension even if an intervening transmission chain has truncated the least-significant-bits of the encoder's output signal.
PCT/GB2013/051548 2012-06-12 2013-06-12 Doubly compatible lossless audio bandwidth extension WO2013186561A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1210373.5 2012-06-12
GBGB1210373.5A GB201210373D0 (en) 2012-06-12 2012-06-12 Doubly compatible lossless audio sandwidth extension

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR1020157000750A KR102202833B1 (en) 2012-06-12 2013-06-12 Doubly compatible lossless audio bandwidth extension
EP13733412.4A EP2859548B1 (en) 2012-06-12 2013-06-12 Doubly compatible lossless audio bandwidth extension
JP2015516683A JP6264699B2 (en) 2012-06-12 2013-06-12 Lossless audio bandwidth expansion with dual compatibility
US14/406,110 US9548055B2 (en) 2012-06-12 2013-06-12 Doubly compatible lossless audio bandwidth extension
CN201380038662.1A CN104508740B (en) 2012-06-12 2013-06-12 Dual compatible lossless audio bandwidth expansion
CA2898923A CA2898923C (en) 2012-06-12 2013-06-12 Doubly compatible lossless audio bandwidth extension

Publications (2)

Publication Number Publication Date
WO2013186561A2 WO2013186561A2 (en) 2013-12-19
WO2013186561A3 true WO2013186561A3 (en) 2014-02-27

Family

ID=46605804

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2013/051548 WO2013186561A2 (en) 2012-06-12 2013-06-12 Doubly compatible lossless audio bandwidth extension

Country Status (8)

Country Link
US (1) US9548055B2 (en)
EP (1) EP2859548B1 (en)
JP (1) JP6264699B2 (en)
KR (1) KR102202833B1 (en)
CN (1) CN104508740B (en)
CA (1) CA2898923C (en)
GB (3) GB201210373D0 (en)
WO (1) WO2013186561A2 (en)

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GB2547877B (en) 2015-12-21 2019-08-14 Graham Craven Peter Lossless bandsplitting and bandjoining using allpass filters
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US10354669B2 (en) 2017-03-22 2019-07-16 Immersion Networks, Inc. System and method for processing audio data
EP3483882A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Controlling bandwidth in encoders and/or decoders
EP3483886A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Selecting pitch lag
EP3483878A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio decoder supporting a set of different loss concealment tools
WO2019091573A1 (en) 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for encoding and decoding an audio signal using downsampling or interpolation of scale parameters
EP3483880A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Temporal noise shaping
WO2019091576A1 (en) 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoders, audio decoders, methods and computer programs adapting an encoding and decoding of least significant bits
EP3483883A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio coding and decoding with selective postfiltering

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Also Published As

Publication number Publication date
CA2898923C (en) 2021-03-16
JP2015519615A (en) 2015-07-09
KR20150032699A (en) 2015-03-27
GB201310497D0 (en) 2013-07-24
KR102202833B1 (en) 2021-01-14
JP6264699B2 (en) 2018-01-24
CA2898923A1 (en) 2013-12-19
US20150154969A1 (en) 2015-06-04
CN104508740A (en) 2015-04-08
CN104508740B (en) 2017-08-11
GB2503110B (en) 2016-06-15
EP2859548A2 (en) 2015-04-15
GB2503110A (en) 2013-12-18
GB201210373D0 (en) 2012-07-25
WO2013186561A2 (en) 2013-12-19
EP2859548B1 (en) 2018-01-31
US9548055B2 (en) 2017-01-17
GB201310486D0 (en) 2013-07-24

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