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1. WO2017132366 - ADAPTIVE QUANTIZATION

Publication Number WO/2017/132366
Publication Date 03.08.2017
International Application No. PCT/US2017/015113
International Filing Date 26.01.2017
IPC
G10L 19/002 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
002Dynamic bit allocation
G10L 19/00 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
H03M 1/00 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
CPC
G10L 19/00
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
G10L 19/002
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
002Dynamic bit allocation
G10L 19/032
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
02using spectral analysis, e.g. transform vocoders or subband vocoders
032Quantisation or dequantisation of spectral components
G10L 19/20
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
16Vocoder architecture
18Vocoders using multiple modes
20using sound class specific coding, hybrid encoders or object based coding
H03M 1/00
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
Applicants
  • DOLBY LABORATORIES LICENSING CORPORATION [US]/[US]
Inventors
  • TSINGOS, Nicolas R.
  • COHEN, Zachary Gideon
  • KUMAR, Vivek
Agents
  • DOLBY LABORATORIES, INC.
  • MACK, Kevin J.
  • ANDERSEN, Robert L.
  • BOSE, Subroto
  • BROWN, Tyrome Y.
  • CARPENTER, John W.
  • DUNCAN, Dennis John
  • KONSTANTINIDES, Konstantinos
  • SOELLNER, Siegfried G.
  • TANASE, Iuliana
  • YON, Sanghyok
Priority Data
16152783.326.01.2016EP
62/287,34826.01.2016US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ADAPTIVE QUANTIZATION
(FR) QUANTIFICATION ADAPTATIVE
Abstract
(EN)
An importance metric, based at least in part on an energy metric, may be determined for each of a plurality of received audio objects. Some methods may involve: determining a global importance metric for all of the audio objects, based, at least in part, on a total energy value calculated by summing the energy metric of each of the audio objects; determining an estimated quantization bit depth and a quantization error for each of the audio objects; calculating a total noise metric for all of the audio objects, the total noise metric being based, at least in part, on a total quantization error corresponding with the estimated quantization bit depth; calculating a total signal-to-noise ratio corresponding with the total noise metric and the total energy value; and determining a final quantization bit depth for each of the audio objects by applying a signal-to-noise ratio threshold to the total signal-to-noise ratio.
(FR)
L'invention concerne une métrique d'importance basée, au moins en partie, sur une métrique d'énergie, qui peut être déterminée pour chacun d'une pluralité d'objets audio reçus. Certains procédés peuvent consister : à déterminer une métrique d'importance globale pour tous les objets audio sur la base, au moins en partie, d'une valeur d'énergie totale calculée en additionnant la métrique d'énergie de chacun des objets audio ; à déterminer une profondeur de bit de quantification estimée et une erreur de quantification pour chacun des objets audio ; à calculer une métrique de bruit totale pour tous les objets audio, la métrique de bruit totale étant basée, au moins en partie, sur une erreur de quantification totale correspondant à la profondeur de bit de quantification estimée ; à calculer un rapport signal sur bruit total correspondant à la métrique de bruit totale et la valeur d'énergie totale ; et à déterminer une profondeur de bit de quantification finale pour chacun des objets audio par application d'un seuil de rapport signal sur bruit au rapport signal sur bruit total.
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