EP0855699A3 - Multipulse-excited speech coder/decoder - Google Patents

Multipulse-excited speech coder/decoder Download PDF

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Publication number
EP0855699A3
EP0855699A3 EP98101335A EP98101335A EP0855699A3 EP 0855699 A3 EP0855699 A3 EP 0855699A3 EP 98101335 A EP98101335 A EP 98101335A EP 98101335 A EP98101335 A EP 98101335A EP 0855699 A3 EP0855699 A3 EP 0855699A3
Authority
EP
European Patent Office
Prior art keywords
circuit
pulse
frame length
coding
pulse signal
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.)
Granted
Application number
EP98101335A
Other languages
German (de)
French (fr)
Other versions
EP0855699B1 (en
EP0855699A2 (en
Inventor
Toshiyuki Nomura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Publication of EP0855699A2 publication Critical patent/EP0855699A2/en
Publication of EP0855699A3 publication Critical patent/EP0855699A3/en
Application granted granted Critical
Publication of EP0855699B1 publication Critical patent/EP0855699B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation

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)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

A coding parameter control circuit 31 computes frame length from bit rate and coding delay, and provides the computed frame length data to a CELP coding circuit 32. On the basis of the computed frame length, the coding parameter control circuit 32 selects control parameters from a table, in which a plurality of control parameters for controlling the operation of the CELP coding circuit are set, on the basis of the bit race, and provides the selected control parameters to the CELP coding circuit. The coding parameter control circuit provides the sub-frame length, and bit number distributed to the multi-pulse signal to the multi-pulse signal generation parameter setting circuit 33. The multi-pulse signal coding parameter setting circuit 33 computes pulse number of multi-pulse excitation signal, pulse position candidates of each pulse and candidate positions thereof from the sub-frame length and bit number of multi-pulse signal.
EP98101335A 1997-01-27 1998-01-27 Multipulse-excited speech coder/decoder Expired - Lifetime EP0855699B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP01247797A JP3329216B2 (en) 1997-01-27 1997-01-27 Audio encoding device and audio decoding device
JP1247797 1997-01-27
JP12477/97 1997-01-27

Publications (3)

Publication Number Publication Date
EP0855699A2 EP0855699A2 (en) 1998-07-29
EP0855699A3 true EP0855699A3 (en) 1999-04-07
EP0855699B1 EP0855699B1 (en) 2004-04-28

Family

ID=11806474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101335A Expired - Lifetime EP0855699B1 (en) 1997-01-27 1998-01-27 Multipulse-excited speech coder/decoder

Country Status (4)

Country Link
EP (1) EP0855699B1 (en)
JP (1) JP3329216B2 (en)
CA (1) CA2228183C (en)
DE (1) DE69823398T2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3166697B2 (en) 1998-01-14 2001-05-14 日本電気株式会社 Audio encoding / decoding device and system
US6721280B1 (en) 2000-04-19 2004-04-13 Qualcomm Incorporated Method and apparatus for voice latency reduction in a voice-over-data wireless communication system
JP3881943B2 (en) * 2002-09-06 2007-02-14 松下電器産業株式会社 Acoustic encoding apparatus and acoustic encoding method
CN101116137B (en) * 2005-02-10 2011-02-09 松下电器产业株式会社 Pulse allocating method in voice coding
CN101138022B (en) * 2005-03-09 2011-08-10 艾利森电话股份有限公司 Low-complexity code excited linear prediction encoding and decoding method and device
US8000967B2 (en) 2005-03-09 2011-08-16 Telefonaktiebolaget Lm Ericsson (Publ) Low-complexity code excited linear prediction encoding
US11276411B2 (en) * 2017-09-20 2022-03-15 Voiceage Corporation Method and device for allocating a bit-budget between sub-frames in a CELP CODEC

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465057A1 (en) * 1990-06-29 1992-01-08 AT&T Corp. Low-delay code-excited linear predictive coding of wideband speech at 32kbits/sec
WO1997015983A1 (en) * 1995-10-27 1997-05-01 Cselt Centro Studi E Laboratori Telecomunicazioni S.P.A. Method of and apparatus for coding, manipulating and decoding audio signals

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465057A1 (en) * 1990-06-29 1992-01-08 AT&T Corp. Low-delay code-excited linear predictive coding of wideband speech at 32kbits/sec
WO1997015983A1 (en) * 1995-10-27 1997-05-01 Cselt Centro Studi E Laboratori Telecomunicazioni S.P.A. Method of and apparatus for coding, manipulating and decoding audio signals

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ABREU-SERNANDEZ V ET AL: "A variable rate multipulse speech coder for CDMA cellular systems", WIRELESS PERSONAL COMMUNICATIONS, 1995, KLUWER ACADEMIC PUBLISHERS, NETHERLANDS, vol. 2, no. 3, ISSN 0929-6212, pages 255 - 263, XP002092014 *
TAUMI S ET AL: "LOW-DELAY CELP WITH MULTI-PULSE VQ AND FAST SEARCH FOR GSM EFR", ICASSP'96: IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, ATLANTA, GA, USA, vol. 1, 7 May 1996 (1996-05-07) - 10 May 1996 (1996-05-10), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 562 - 565, XP002070710 *

Also Published As

Publication number Publication date
CA2228183C (en) 2001-05-29
DE69823398D1 (en) 2004-06-03
JPH10207496A (en) 1998-08-07
CA2228183A1 (en) 1998-07-27
EP0855699B1 (en) 2004-04-28
EP0855699A2 (en) 1998-07-29
JP3329216B2 (en) 2002-09-30
DE69823398T2 (en) 2005-01-13

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