CA2511516A1 - Method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding - Google Patents

Method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding Download PDF

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Publication number
CA2511516A1
CA2511516A1 CA002511516A CA2511516A CA2511516A1 CA 2511516 A1 CA2511516 A1 CA 2511516A1 CA 002511516 A CA002511516 A CA 002511516A CA 2511516 A CA2511516 A CA 2511516A CA 2511516 A1 CA2511516 A1 CA 2511516A1
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prediction
vector
linear prediction
sound signal
variable bit
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CA002511516A
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French (fr)
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CA2511516C (en
Inventor
Milan Jelinek
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Nokia Technologies Oy
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Priority claimed from CA002415105A external-priority patent/CA2415105A1/en
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    • 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
    • G10L19/02—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
    • G10L19/038—Vector quantisation, e.g. TwinVQ audio
    • 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

Abstract

The present invention relates to a method and device for quantizing linear prediction parameters in variable bit-rate sound signal coding, in which an input linear prediction parameter vector is received, a sound signal frame corresponding to the input linear prediction parameter vector is classified, a prediction vector is computed, the computed prediction vector is removed from the input linear prediction parameter vector to produce a prediction error vector, and the prediction error vector is quantized. Computation of the prediction vector comprises selecting one of a plurality of prediction schemes in relation to the classification of the sound signal frame, and processing the prediction error vector through the selected prediction scheme. The present invention further relates to a method and device for dequantizing linear prediction parameters in variable bit-rate sound signal decoding, in which at least one quantization index and information about classification of a sound signal frame corresponding to the quantization index are received, a prediction error vector is recovered by applying the index to at least one quantization table, a prediction vector is reconstructed, and a linear prediction parameter vector is produced in response to the recovered prediction error vector and the reconstructed prediction vector.
Reconstruction of the prediction vector comprises processing the recovered prediction error vector through one of a plurality of prediction schemes depending on the frame classification information.
CA002511516A 2002-12-24 2003-12-18 Method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding Expired - Lifetime CA2511516C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002511516A CA2511516C (en) 2002-12-24 2003-12-18 Method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA002415105A CA2415105A1 (en) 2002-12-24 2002-12-24 A method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding
CA2,415,105 2002-12-24
PCT/CA2003/001985 WO2004059618A1 (en) 2002-12-24 2003-12-18 Method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding
CA002511516A CA2511516C (en) 2002-12-24 2003-12-18 Method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding

Publications (2)

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CA2511516A1 true CA2511516A1 (en) 2004-07-15
CA2511516C CA2511516C (en) 2009-03-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010003253A1 (en) * 2008-07-10 2010-01-14 Voiceage Corporation Variable bit rate lpc filter quantizing and inverse quantizing device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010003253A1 (en) * 2008-07-10 2010-01-14 Voiceage Corporation Variable bit rate lpc filter quantizing and inverse quantizing device and method
US8332213B2 (en) 2008-07-10 2012-12-11 Voiceage Corporation Multi-reference LPC filter quantization and inverse quantization device and method
US8712764B2 (en) 2008-07-10 2014-04-29 Voiceage Corporation Device and method for quantizing and inverse quantizing LPC filters in a super-frame
US9245532B2 (en) 2008-07-10 2016-01-26 Voiceage Corporation Variable bit rate LPC filter quantizing and inverse quantizing device and method
USRE49363E1 (en) 2008-07-10 2023-01-10 Voiceage Corporation Variable bit rate LPC filter quantizing and inverse quantizing device and method

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Publication number Publication date
CA2511516C (en) 2009-03-03

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