HK1109817A1 - Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic - Google Patents

Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic

Info

Publication number
HK1109817A1
HK1109817A1 HK08103465A HK08103465A HK1109817A1 HK 1109817 A1 HK1109817 A1 HK 1109817A1 HK 08103465 A HK08103465 A HK 08103465A HK 08103465 A HK08103465 A HK 08103465A HK 1109817 A1 HK1109817 A1 HK 1109817A1
Authority
HK
Hong Kong
Prior art keywords
audio
filter
warping characteristic
characteristic
processor
Prior art date
Application number
HK08103465A
Inventor
Wabnik Stefan
Schuller Gerald
Herre Juergen
Grill Bernhard
Multrus Markus
Bayer Stefan
Kraemer Ulrich
Hirschfeld Jens
Original Assignee
Fraunhofer Ges Forschung
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 Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of HK1109817A1 publication Critical patent/HK1109817A1/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
    • G10L19/04—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
    • 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
    • G10L19/26—Pre-filtering or post-filtering
    • G10L19/265—Pre-filtering, e.g. high frequency emphasis prior to encoding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Stereophonic System (AREA)

Abstract

An audio encoder, an audio decoder or an audio processor includes a filter for generating a filtered audio signal, the filter having a variable warping characteristic, the characteristic being controllable in response to a time-varying control signal, the control signal indicating a small or no warping characteristic or a comparatively high warping characteristic. Furthermore, a controller is connected for providing the time-varying control signal, which depends on the audio signal. The filtered audio signal can be introduced to an encoding processor having different encoding algorithms, one of which is a coding algorithm adapted to a specific signal pattern. Alternatively, the filter is a post-filter receiving a decoded audio signal.
HK08103465A 2006-06-30 2008-03-27 Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic HK1109817A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06013604A EP1873754B1 (en) 2006-06-30 2006-06-30 Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic

Publications (1)

Publication Number Publication Date
HK1109817A1 true HK1109817A1 (en) 2008-06-20

Family

ID=37402718

Family Applications (1)

Application Number Title Priority Date Filing Date
HK08103465A HK1109817A1 (en) 2006-06-30 2008-03-27 Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic

Country Status (4)

Country Link
EP (2) EP1990799A1 (en)
AT (1) ATE408217T1 (en)
DE (1) DE602006002739D1 (en)
HK (1) HK1109817A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2445719C2 (en) * 2010-04-21 2012-03-20 Государственное образовательное учреждение высшего профессионального образования Академия Федеральной службы охраны Российской Федерации (Академия ФСО России) Method of enhancing synthesised speech perception when performing analysis through synthesis in linear predictive vocoders
WO2012000882A1 (en) 2010-07-02 2012-01-05 Dolby International Ab Selective bass post filter
PL2951820T3 (en) * 2013-01-29 2017-06-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for selecting one of a first audio encoding algorithm and a second audio encoding algorithm
EP2980801A1 (en) 2014-07-28 2016-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for estimating noise in an audio signal, noise estimator, audio encoder, audio decoder, and system for transmitting audio signals
EP2980795A1 (en) 2014-07-28 2016-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoding and decoding using a frequency domain processor, a time domain processor and a cross processor for initialization of the time domain processor
EP2980794A1 (en) 2014-07-28 2016-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoder and decoder using a frequency domain processor and a time domain processor
EP3079151A1 (en) * 2015-04-09 2016-10-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoder and method for encoding an audio signal

Also Published As

Publication number Publication date
ATE408217T1 (en) 2008-09-15
EP1990799A1 (en) 2008-11-12
EP1873754A1 (en) 2008-01-02
EP1873754B1 (en) 2008-09-10
DE602006002739D1 (en) 2008-10-23

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