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IN2015MN02784A - - Google Patents

Info

Publication number
IN2015MN02784A
IN2015MN02784A IN2784MUN2015A IN2015MN02784A IN 2015MN02784 A IN2015MN02784 A IN 2015MN02784A IN 2784MUN2015 A IN2784MUN2015 A IN 2784MUN2015A IN 2015MN02784 A IN2015MN02784 A IN 2015MN02784A
Authority
IN
India
Prior art keywords
time domain
audio signal
domain representation
stage
processing system
Prior art date
Application number
Inventor
Kristofer Kjoerling
Heiko Purnhagen
Lars Villemoes
Original Assignee
Dolby Int Ab
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 Dolby Int Ab filed Critical Dolby Int Ab
Publication of IN2015MN02784A publication Critical patent/IN2015MN02784A/en

Links

Classifications

    • 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
    • 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
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • 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
    • 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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/032—Quantisation or dequantisation of spectral components
    • 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
    • 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
    • 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
    • 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
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

An audio processing system (100) comprises a front end component (102 103) which receives quantized spectral components and performs an inverse quantization yielding a time domain representation of an intermediate signal. The audio processing system further comprises a frequency domain processing stage (104 105 106 107 108) configured to provide a time domain representation of a processed audio signal and a sample rate converter (109) providing a reconstructed audio signal sampled at a target sampling frequency. The respective internal sampling rates of the time domain representation of the intermediate audio signal and of the time domain representation of the processed audio signal are equal. In particular embodiments the processing stage comprises a parametric upmix stage which is operable in at least two different modes and is associated with a delay stage that ensures constant total delay.
IN2784MUN2015 2013-04-05 2014-04-04 IN2015MN02784A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201361809019P 2013-04-05 2013-04-05
US201361875959P 2013-09-10 2013-09-10
PCT/EP2014/056857 WO2014161996A2 (en) 2013-04-05 2014-04-04 Audio processing system

Publications (1)

Publication Number Publication Date
IN2015MN02784A true IN2015MN02784A (en) 2015-10-23

Family

ID=50489074

Family Applications (1)

Application Number Title Priority Date Filing Date
IN2784MUN2015 IN2015MN02784A (en) 2013-04-05 2014-04-04

Country Status (11)

Country Link
US (2) US9478224B2 (en)
EP (1) EP2981956B1 (en)
JP (2) JP6013646B2 (en)
KR (1) KR101717006B1 (en)
CN (2) CN105247613B (en)
BR (1) BR112015025092B1 (en)
ES (1) ES2934646T3 (en)
HK (1) HK1214026A1 (en)
IN (1) IN2015MN02784A (en)
RU (1) RU2625444C2 (en)
WO (1) WO2014161996A2 (en)

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Also Published As

Publication number Publication date
WO2014161996A3 (en) 2014-12-04
CN109509478B (en) 2023-09-05
JP6407928B2 (en) 2018-10-17
JP6013646B2 (en) 2016-10-25
RU2625444C2 (en) 2017-07-13
KR101717006B1 (en) 2017-03-15
RU2015147158A (en) 2017-05-17
US20160372123A1 (en) 2016-12-22
KR20150139601A (en) 2015-12-11
ES2934646T3 (en) 2023-02-23
US9478224B2 (en) 2016-10-25
EP2981956B1 (en) 2022-11-30
CN109509478A (en) 2019-03-22
JP2017017749A (en) 2017-01-19
CN105247613B (en) 2019-01-18
JP2016514858A (en) 2016-05-23
US20160055855A1 (en) 2016-02-25
BR112015025092B1 (en) 2022-01-11
EP2981956A2 (en) 2016-02-10
US9812136B2 (en) 2017-11-07
CN105247613A (en) 2016-01-13
BR112015025092A2 (en) 2017-07-18
WO2014161996A2 (en) 2014-10-09
HK1214026A1 (en) 2016-07-15

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