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

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
    • 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

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)
  • Physical Or Chemical Processes And Apparatus (AREA)

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

ID=21741098

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00912053T ATE341074T1 (en) 2000-02-29 2000-02-29 MULTIMODAL MIXED RANGE CLOSED LOOP VOICE ENCODER

Country Status (10)

Country Link
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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KR101297120B1 (en) * 2007-04-26 2013-08-21 지멘스 악티엔게젤샤프트 Module with automatic extension of a monitoring circuit
KR101756834B1 (en) * 2008-07-14 2017-07-12 삼성전자주식회사 Method and apparatus for encoding and decoding of speech and audio signal
US8990094B2 (en) 2010-09-13 2015-03-24 Qualcomm Incorporated Coding and decoding a transient frame
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KR101424372B1 (en) 2011-02-14 2014-08-01 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. Information signal representation using lapped transform
PL2676268T3 (en) 2011-02-14 2015-05-29 Fraunhofer Ges Forschung Apparatus and method for processing a decoded audio signal in a spectral domain
PT3239978T (en) 2011-02-14 2019-04-02 Fraunhofer Ges Forschung Encoding and decoding of pulse positions of tracks of an audio signal
TWI488176B (en) * 2011-02-14 2015-06-11 Fraunhofer Ges Forschung Encoding and decoding of pulse positions of tracks of an audio signal
BR112013020324B8 (en) 2011-02-14 2022-02-08 Fraunhofer Ges Forschung Apparatus and method for error suppression in low delay unified speech and audio coding
PT2676270T (en) 2011-02-14 2017-05-02 Fraunhofer Ges Forschung Coding a portion of an audio signal using a transient detection and a quality result
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
US9685166B2 (en) 2014-07-26 2017-06-20 Huawei Technologies Co., Ltd. Classification between time-domain coding and frequency domain coding
EP3067886A1 (en) 2015-03-09 2016-09-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoder for encoding a multichannel signal and audio decoder for decoding an encoded audio signal
US10957331B2 (en) * 2018-12-17 2021-03-23 Microsoft Technology Licensing, Llc Phase reconstruction in a speech decoder

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Also Published As

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

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