SE0200785L - Algebraic codebook with signal-selected pulse amplitudes for fast coding of speech - Google Patents

Algebraic codebook with signal-selected pulse amplitudes for fast coding of speech

Info

Publication number
SE0200785L
SE0200785L SE0200785A SE0200785A SE0200785L SE 0200785 L SE0200785 L SE 0200785L SE 0200785 A SE0200785 A SE 0200785A SE 0200785 A SE0200785 A SE 0200785A SE 0200785 L SE0200785 L SE 0200785L
Authority
SE
Sweden
Prior art keywords
filter
speech
signal
pulse amplitudes
selected pulse
Prior art date
Application number
SE0200785A
Other languages
Swedish (sv)
Other versions
SE0200785D0 (en
SE524905C2 (en
Inventor
Jean-Pierre Adoul
Claude Laflamme
Original Assignee
Univ Sherbrooke
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
Priority claimed from US08/508,801 external-priority patent/US5754976A/en
Application filed by Univ Sherbrooke filed Critical Univ Sherbrooke
Priority to SE0200785A priority Critical patent/SE524905C2/en
Publication of SE0200785D0 publication Critical patent/SE0200785D0/en
Publication of SE0200785L publication Critical patent/SE0200785L/en
Publication of SE524905C2 publication Critical patent/SE524905C2/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
    • G10L19/08—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

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

The pulse combination codebook searching method involves a series of parameter being derived by the spectrum analyser (102) and the filter responses characteriser (105) for each sample (S). The pitch extractor (104) obtains further data following processing by the whitening filter (103). Processing by the perceptual filter (107), the backward filter (108) and the long term predictor (106) enables the amplitude selector (112) to restrain the code vectors being searched by the optimising controller (109), to those which are most promising. Parameters for the final selection are converted into digital channel format by the multiplexer (111), for entry into the dynamic codebook.
SE0200785A 1995-02-06 2002-03-15 Pulse combination codebook searching method for sound signal encoding - preselecting sound related pulse combination subset and searching within that subset SE524905C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE0200785A SE524905C2 (en) 1995-02-06 2002-03-15 Pulse combination codebook searching method for sound signal encoding - preselecting sound related pulse combination subset and searching within that subset

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US38396895A 1995-02-06 1995-02-06
US08/508,801 US5754976A (en) 1990-02-23 1995-07-28 Algebraic codebook with signal-selected pulse amplitude/position combinations for fast coding of speech
SE9600437A SE520553C2 (en) 1995-02-06 1996-02-06 Algebraic codebook with signal-selected pulse amplitudes for fast coding of speech
SE0200785A SE524905C2 (en) 1995-02-06 2002-03-15 Pulse combination codebook searching method for sound signal encoding - preselecting sound related pulse combination subset and searching within that subset

Publications (3)

Publication Number Publication Date
SE0200785D0 SE0200785D0 (en) 2002-03-15
SE0200785L true SE0200785L (en) 2002-03-15
SE524905C2 SE524905C2 (en) 2004-10-19

Family

ID=27484542

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0200785A SE524905C2 (en) 1995-02-06 2002-03-15 Pulse combination codebook searching method for sound signal encoding - preselecting sound related pulse combination subset and searching within that subset

Country Status (1)

Country Link
SE (1) SE524905C2 (en)

Also Published As

Publication number Publication date
SE0200785D0 (en) 2002-03-15
SE524905C2 (en) 2004-10-19

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