[go: up one dir, main page]

EP1355298A3 - Code Excitation linear prediction encoder and decoder - Google Patents

Code Excitation linear prediction encoder and decoder Download PDF

Info

Publication number
EP1355298A3
EP1355298A3 EP03013629A EP03013629A EP1355298A3 EP 1355298 A3 EP1355298 A3 EP 1355298A3 EP 03013629 A EP03013629 A EP 03013629A EP 03013629 A EP03013629 A EP 03013629A EP 1355298 A3 EP1355298 A3 EP 1355298A3
Authority
EP
European Patent Office
Prior art keywords
excitation codebook
codebook
stochastic
excitation
decoder
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
EP03013629A
Other languages
German (de)
French (fr)
Other versions
EP1355298B1 (en
EP1355298A2 (en
Inventor
Kenichiro Hosoda
Hiromi Aoyaki
Hiroshi Katsuragawa
Yoshihiro Ariyama
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority claimed from EP93913500A external-priority patent/EP0654909A4/en
Priority claimed from PCT/JP1993/000776 external-priority patent/WO1994029965A1/en
Publication of EP1355298A2 publication Critical patent/EP1355298A2/en
Publication of EP1355298A3 publication Critical patent/EP1355298A3/en
Application granted granted Critical
Publication of EP1355298B1 publication Critical patent/EP1355298B1/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
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0004—Design or structure of the codebook
    • G10L2019/0005—Multi-stage vector quantisation

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)

Abstract

A code excitation linear predictive (CELP) coding or decoding apparatus is provided in which a code vector, which is provided by a stochastic codebook (108), is converted adaptively in accordance with vocal tract analysis information (LPC) so that a high quality reproduction speech is obtained at a low coding rate. Further, in order to obtain a similar effect, a pulse-like excitation codebook formed of an isolated impulse is provided in addition to the adaptive excitation codebook (107) and stochastic excitation codebook (108) so that either the stochastic excitation codebook or the pulse-like excitation codebook is selectively used to provide a vocal tract parameter as a linear spectrum pair parameter.
EP03013629A 1993-06-10 1993-06-10 Code Excitation linear prediction encoder and decoder Expired - Lifetime EP1355298B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP93913500A EP0654909A4 (en) 1993-06-10 1993-06-10 Code excitation linear prediction encoder and decoder.
PCT/JP1993/000776 WO1994029965A1 (en) 1993-06-10 1993-06-10 Code excitation linear prediction encoder and decoder

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP93913500A Division EP0654909A4 (en) 1993-06-10 1993-06-10 Code excitation linear prediction encoder and decoder.

Publications (3)

Publication Number Publication Date
EP1355298A2 EP1355298A2 (en) 2003-10-22
EP1355298A3 true EP1355298A3 (en) 2004-02-04
EP1355298B1 EP1355298B1 (en) 2007-02-21

Family

ID=28459643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03013629A Expired - Lifetime EP1355298B1 (en) 1993-06-10 1993-06-10 Code Excitation linear prediction encoder and decoder

Country Status (1)

Country Link
EP (1) EP1355298B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2102619B1 (en) * 2006-10-24 2017-03-22 Voiceage Corporation Method and device for coding transition frames in speech signals
US8463615B2 (en) 2007-07-30 2013-06-11 Google Inc. Low-delay audio coder
ATE479182T1 (en) * 2007-07-30 2010-09-15 Global Ip Solutions Gips Ab LOW DELAY AUDIO DECODER
CN111818519B (en) * 2020-07-16 2022-02-11 郑州信大捷安信息技术股份有限公司 End-to-end voice encryption and decryption method and system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462559A2 (en) * 1990-06-18 1991-12-27 Fujitsu Limited Speech coding and decoding system
EP0476614A2 (en) * 1990-09-18 1992-03-25 Fujitsu Limited Speech coding and decoding system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462559A2 (en) * 1990-06-18 1991-12-27 Fujitsu Limited Speech coding and decoding system
EP0476614A2 (en) * 1990-09-18 1992-03-25 Fujitsu Limited Speech coding and decoding system

Also Published As

Publication number Publication date
EP1355298B1 (en) 2007-02-21
EP1355298A2 (en) 2003-10-22

Similar Documents

Publication Publication Date Title
Andersen et al. iLBC-a linear predictive coder with robustness to packet losses
KR100304682B1 (en) Fast Excitation Coding for Speech Coders
EP0770990A3 (en) Speech encoding method and apparatus and speech decoding method and apparatus
CA2636552A1 (en) A method for speech coding, method for speech decoding and their apparatuses
EP0751494A4 (en) Sound encoding system
CA2271410C (en) Speech coding apparatus and speech decoding apparatus
EP0785541B1 (en) Usage of voice activity detection for efficient coding of speech
US6385576B2 (en) Speech encoding/decoding method using reduced subframe pulse positions having density related to pitch
WO2004084180B1 (en) Voicing index controls for celp speech coding
AU5542201A (en) Gains quantization for a clep speech coder
JPS6440899A (en) Cord excitation linearity prediction vocoder using false search
WO1999021174A1 (en) Sound encoder and sound decoder
US6847929B2 (en) Algebraic codebook system and method
JPH10187196A (en) Low bit rate pitch delay coder
CA2105269A1 (en) Time-Frequency Interpolation with Application to Low Rate Speech Coding
DE69126062D1 (en) Speech coding and decoding system
AU6230199A (en) Celp voice encoder
CA2005115A1 (en) Low-delay code-excited linear predictive coder for speech or audio
DE69703233D1 (en) Methods and systems for speech coding
EP1355298A3 (en) Code Excitation linear prediction encoder and decoder
Gerson et al. A 5600 bps VSELP speech coder candidate for half-rate GSM
WO2003001172A1 (en) Method and device for coding speech in analysis-by-synthesis speech coders
JP2968109B2 (en) Code-excited linear prediction encoder and decoder
US20080154587A1 (en) Gain Quantization System for Speech Coding to Improve Packet Loss Concealment
Hagen et al. An 8 kbit/s ACELP coder with improved background noise performance

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030707

AC Divisional application: reference to earlier application

Ref document number: 0654909

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB SE

AKX Designation fees paid

Designated state(s): DE FR GB SE

17Q First examination report despatched

Effective date: 20050502

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 0654909

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69334115

Country of ref document: DE

Date of ref document: 20070405

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070521

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20071122

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120607

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20120606

Year of fee payment: 20

Ref country code: FR

Payment date: 20120619

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69334115

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20130609

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130609

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130611