ATE341074T1 - MULTIMODAL MIXED RANGE CLOSED LOOP VOICE ENCODER - Google Patents

MULTIMODAL MIXED RANGE CLOSED LOOP VOICE ENCODER

Info

Publication number
ATE341074T1
ATE341074T1 AT00912053T AT00912053T ATE341074T1 AT E341074 T1 ATE341074 T1 AT E341074T1 AT 00912053 T AT00912053 T AT 00912053T AT 00912053 T AT00912053 T AT 00912053T AT E341074 T1 ATE341074 T1 AT E341074T1
Authority
AT
Austria
Prior art keywords
coding mode
encoded
speech
domain coding
speech frame
Prior art date
Application number
AT00912053T
Other languages
German (de)
Inventor
Amitava Das
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Application granted granted Critical
Publication of ATE341074T1 publication Critical patent/ATE341074T1/en

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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
    • G10L19/04—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
    • 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

Abstract

A closed-loop, multimode, mixed-domain linear prediction (MDLP) speech coder includes a high-rate, time-domain coding mode, a low-rate, frequency-domain coding mode, and a closed-loop mode-selection mechanism for selecting a coding mode for the coder based upon the speech content of frames input to the coder. Transition speech (i.e., from unvoiced speech to voiced speech, or vice versa) frames are encoded with the high-rate, time-domain coding mode, which may be a CELP coding mode. Voiced speech frames are encoded with the low-rate, frequency-domain coding mode, which may be a harmonic coding mode. Phase parameters are not encoded by the frequency-domain coding mode, and are instead modeled in accordance with, e.g., a quadratic phase model. For each speech frame encoded with the frequency-domain coding mode, the initial phase value is taken to be the initial phase value of the immediately preceding speech frame encoded with the frequency-domain coding mode. If the immediately preceding speech frame was encoded with the time-domain coding mode, the initial phase value of the current speech frame is computed from the decoded speech frame information of the immediately preceding, time-domain-encoded speech frame. Each speech frame encoded with the frequency-domain coding mode may be compared with the corresponding input speech frame to obtain a performance measure. If the performance measure falls below a predefined threshold value, the input speech frame is encoded with the time-domain coding mode.
AT00912053T 2000-02-29 2000-02-29 MULTIMODAL MIXED RANGE CLOSED LOOP VOICE ENCODER ATE341074T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/005140 WO2001065544A1 (en) 2000-02-29 2000-02-29 Closed-loop multimode mixed-domain linear prediction speech coder

Publications (1)

Publication Number Publication Date
ATE341074T1 true ATE341074T1 (en) 2006-10-15

Family

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Family Applications (1)

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AT00912053T ATE341074T1 (en) 2000-02-29 2000-02-29 MULTIMODAL MIXED RANGE CLOSED LOOP VOICE ENCODER

Country Status (10)

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EP (1) EP1259957B1 (en)
JP (1) JP4907826B2 (en)
KR (1) KR100711047B1 (en)
CN (1) CN1266674C (en)
AT (1) ATE341074T1 (en)
AU (1) AU2000233851A1 (en)
DE (1) DE60031002T2 (en)
ES (1) ES2269112T3 (en)
HK (1) HK1055833A1 (en)
WO (1) WO2001065544A1 (en)

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JP5849106B2 (en) 2011-02-14 2016-01-27 フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン Apparatus and method for error concealment in low delay integrated speech and audio coding
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JP5625126B2 (en) 2011-02-14 2014-11-12 フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン Linear prediction based coding scheme using spectral domain noise shaping
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CN103503062B (en) 2011-02-14 2016-08-10 弗劳恩霍夫应用研究促进协会 For using the prediction part of alignment by audio-frequency signal coding and the apparatus and method of decoding
CN103534754B (en) 2011-02-14 2015-09-30 弗兰霍菲尔运输应用研究公司 The audio codec utilizing noise to synthesize during the inertia stage
EP2757558A1 (en) * 2013-01-18 2014-07-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Time domain level adjustment for audio signal decoding or encoding
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Also Published As

Publication number Publication date
KR100711047B1 (en) 2007-04-24
EP1259957B1 (en) 2006-09-27
WO2001065544A1 (en) 2001-09-07
AU2000233851A1 (en) 2001-09-12
JP2003525473A (en) 2003-08-26
EP1259957A1 (en) 2002-11-27
CN1437747A (en) 2003-08-20
DE60031002D1 (en) 2006-11-09
JP4907826B2 (en) 2012-04-04
DE60031002T2 (en) 2007-05-10
CN1266674C (en) 2006-07-26
ES2269112T3 (en) 2007-04-01
HK1055833A1 (en) 2004-01-21
KR20020081374A (en) 2002-10-26

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