DE60038915D1 - Verfahren und Vorrichtungen zur Spektralbandreplikation und Hochfrequenzen-Rekonstruktion basierten Audiokodierung mittels adaptivem Addieren von Grundrauschen und Begrenzung der Rauschsubstitution - Google Patents

Verfahren und Vorrichtungen zur Spektralbandreplikation und Hochfrequenzen-Rekonstruktion basierten Audiokodierung mittels adaptivem Addieren von Grundrauschen und Begrenzung der Rauschsubstitution

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Publication number
DE60038915D1
DE60038915D1 DE60038915T DE60038915T DE60038915D1 DE 60038915 D1 DE60038915 D1 DE 60038915D1 DE 60038915 T DE60038915 T DE 60038915T DE 60038915 T DE60038915 T DE 60038915T DE 60038915 D1 DE60038915 D1 DE 60038915D1
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DE
Germany
Prior art keywords
noise
high frequency
limiting
audio coding
frequency reconstruction
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
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DE60038915T
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English (en)
Inventor
Lars Liljeryd
Kristofer Kjoerling
Per Ekstrand
Fredrik Henn
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Dolby Sweden AB
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Coding Technologies Sweden AB
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Priority claimed from SE9900256A external-priority patent/SE9900256D0/xx
Application filed by Coding Technologies Sweden AB filed Critical Coding Technologies Sweden AB
Application granted granted Critical
Publication of DE60038915D1 publication Critical patent/DE60038915D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G10L19/02—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
    • G10L19/028—Noise substitution, i.e. substituting non-tonal spectral components by noisy source
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • 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
    • G10L19/26—Pre-filtering or post-filtering
    • 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
    • G10L19/26—Pre-filtering or post-filtering
    • G10L19/265—Pre-filtering, e.g. high frequency emphasis prior to encoding
    • 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
    • G10L19/035—Scalar quantisation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band
DE60038915T 1999-01-27 2000-01-26 Verfahren und Vorrichtungen zur Spektralbandreplikation und Hochfrequenzen-Rekonstruktion basierten Audiokodierung mittels adaptivem Addieren von Grundrauschen und Begrenzung der Rauschsubstitution Expired - Lifetime DE60038915D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9900256A SE9900256D0 (sv) 1999-01-27 1999-01-27 Metod och anordning för förbättring av effektivitet och ljudkvalitet hos ljudkodare
SE9903553A SE9903553D0 (sv) 1999-01-27 1999-10-01 Enhancing percepptual performance of SBR and related coding methods by adaptive noise addition (ANA) and noise substitution limiting (NSL)

Publications (1)

Publication Number Publication Date
DE60038915D1 true DE60038915D1 (de) 2008-06-26

Family

ID=26663489

Family Applications (5)

Application Number Title Priority Date Filing Date
DE60043364T Expired - Lifetime DE60043364D1 (de) 1999-01-27 2000-01-26 Vorrichtung und Verfahren für die Anpassung der spektralen Hüllkurve eines hochfrequenzrekonstruierten Signals
DE60038915T Expired - Lifetime DE60038915D1 (de) 1999-01-27 2000-01-26 Verfahren und Vorrichtungen zur Spektralbandreplikation und Hochfrequenzen-Rekonstruktion basierten Audiokodierung mittels adaptivem Addieren von Grundrauschen und Begrenzung der Rauschsubstitution
DE60043363T Expired - Lifetime DE60043363D1 (de) 1999-01-27 2000-01-26 Verfahren und Vorrichtung für die Dekodierung eines Signals mittels Spektralbandreplikation und Interpolation von Skalenfaktoren
DE60013785T Expired - Lifetime DE60013785T2 (de) 1999-01-27 2000-01-26 VERBESSERTE SUBJEKTIVE QUALITäT VON SBR (SPECTRAL BAND REPLICATION)UND HFR (HIGH FREQUENCY RECONSTRUCTION) KODIERVERFAHREN DURCH ADDIEREN VON GRUNDRAUSCHEN UND BEGRENZUNG DER RAUSCHSUBSTITUTION
DE60024501T Expired - Lifetime DE60024501T2 (de) 1999-01-27 2000-01-26 Verbesserung der perzeptuellen Qualität von SBR (Spektralbandreplikation) UND HFR (Hochfrequenzen-Rekonstruktion) Kodierverfahren mittels adaptivem Addieren von Grundrauschen und Begrenzung der Rauschsubstitution

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE60043364T Expired - Lifetime DE60043364D1 (de) 1999-01-27 2000-01-26 Vorrichtung und Verfahren für die Anpassung der spektralen Hüllkurve eines hochfrequenzrekonstruierten Signals

Family Applications After (3)

Application Number Title Priority Date Filing Date
DE60043363T Expired - Lifetime DE60043363D1 (de) 1999-01-27 2000-01-26 Verfahren und Vorrichtung für die Dekodierung eines Signals mittels Spektralbandreplikation und Interpolation von Skalenfaktoren
DE60013785T Expired - Lifetime DE60013785T2 (de) 1999-01-27 2000-01-26 VERBESSERTE SUBJEKTIVE QUALITäT VON SBR (SPECTRAL BAND REPLICATION)UND HFR (HIGH FREQUENCY RECONSTRUCTION) KODIERVERFAHREN DURCH ADDIEREN VON GRUNDRAUSCHEN UND BEGRENZUNG DER RAUSCHSUBSTITUTION
DE60024501T Expired - Lifetime DE60024501T2 (de) 1999-01-27 2000-01-26 Verbesserung der perzeptuellen Qualität von SBR (Spektralbandreplikation) UND HFR (Hochfrequenzen-Rekonstruktion) Kodierverfahren mittels adaptivem Addieren von Grundrauschen und Begrenzung der Rauschsubstitution

Country Status (15)

Country Link
US (11) US6708145B1 (de)
EP (5) EP1617418B1 (de)
JP (7) JP3603026B2 (de)
CN (6) CN1181467C (de)
AT (5) ATE449407T1 (de)
AU (1) AU2585700A (de)
BR (4) BRPI0009138B1 (de)
DE (5) DE60043364D1 (de)
DK (5) DK1157374T3 (de)
ES (5) ES2334404T3 (de)
HK (6) HK1053534A1 (de)
PT (4) PT1617418E (de)
RU (1) RU2226032C2 (de)
SE (1) SE9903553D0 (de)
WO (1) WO2000045379A2 (de)

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