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CY1119494T1 - Κβαντισμος μεταβλητου δυφιορρυθμου για φιλτρο lpc και διαταξη και μεθοδος αντιστροφου κβαντισμου - Google Patents

Κβαντισμος μεταβλητου δυφιορρυθμου για φιλτρο lpc και διαταξη και μεθοδος αντιστροφου κβαντισμου

Info

Publication number
CY1119494T1
CY1119494T1 CY20171101113T CY171101113T CY1119494T1 CY 1119494 T1 CY1119494 T1 CY 1119494T1 CY 20171101113 T CY20171101113 T CY 20171101113T CY 171101113 T CY171101113 T CY 171101113T CY 1119494 T1 CY1119494 T1 CY 1119494T1
Authority
CY
Cyprus
Prior art keywords
vector
weighted
lpc filter
residual
produce
Prior art date
Application number
CY20171101113T
Other languages
English (en)
Inventor
Bruno Bessette
Philippe Gournay
Redwan Salami
Original Assignee
Voiceage Corporation
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 Voiceage Corporation filed Critical Voiceage Corporation
Publication of CY1119494T1 publication Critical patent/CY1119494T1/el

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
    • 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3082—Vector coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

Διάταξη και μέθοδος για κβαντισμό φίλτρου LPC στη μορφή διανύσματος εισόδου σε πεδίο κβαντισμού, που περιλαμβάνουν υπολογιστή για τον υπολογισμό προσέγγισης πρώτου σταδίου του διανύσματος εισόδου, αφαιρέτη για αφαίρεση της προσέγγισης πρώτου σταδίου από το διάνυσμα εισόδου ώστε να παράγεται διάνυσμα υπολοίπου, υπολογιστή για υπολογισμό συνάρτησης στάθμισης από την προσέγγιση πρώτου σταδίου, στρεβλωτή για πολλαπλασιασμό του διανύσματος υπολοίπου με τη συνάρτηση στάθμισης, και κβαντιστή για κβαντισμό του σταθμισμένου διανύσματος υπολοίπου ώστε να παρέχεται κβαντισμένο σταθμισμένο διάνυσμα υπολοίπου. Διάταξη και μέθοδος για αντίστροφο κβαντισμό φίλτρου LPC, που περιλαμβάνουν μέσο για λήψη κωδικευμένων δεικτών που αντιπροσωπεύουν μια προσέγγιση πρώτου σταδίου ενός διανύσματος αντιπροσωπευτικού του φίλτρου LPC σε πεδίο κβαντισμού και μιας κβαντισμένης σταθμισμένης εκδοχής υπολοίπου του διανύσματος, υπολογιστή για υπολογισμό αντίστροφης συνάρτησης στάθμισης από την προσέγγιση πρώτου σταδίου, αντίστροφο κβαντιστή για την κβαντισμένη σταθμισμένη εκδοχή υπολοίπου του διανύσματος ώστε να παράγεται σταθμισμένο διάνυσμα υπολοίπου, πολλαπλασιαστή που πολλαπλασιάζει το σταθμισμένο διάνυσμα υπολοίπου με την αντίστροφη συνάρτηση στάθμισης ώστε να παράγεται διάνυσμα υπολοίπου, και αθροιστή που αθροίζει την προσέγγιση πρώτου σταδίου με το διάνυσμα υπολοίπου για να παράγει το διάνυσμα που αντιπροσωπεύει το φίλτρο LPC στο πεδίο κβαντισμού.
CY20171101113T 2008-07-10 2017-10-26 Κβαντισμος μεταβλητου δυφιορρυθμου για φιλτρο lpc και διαταξη και μεθοδος αντιστροφου κβαντισμου CY1119494T1 (el)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12966908P 2008-07-10 2008-07-10
US20207509P 2009-01-27 2009-01-27
PCT/CA2009/000980 WO2010003253A1 (en) 2008-07-10 2009-07-10 Variable bit rate lpc filter quantizing and inverse quantizing device and method

Publications (1)

Publication Number Publication Date
CY1119494T1 true CY1119494T1 (el) 2018-03-07

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Family Applications (3)

Application Number Title Priority Date Filing Date
CY20171100951T CY1119501T1 (el) 2008-07-10 2017-09-08 Συσκευη και μεθοδος για τον κβαντισμο φιλτρων lpc σε ενα υπερπλαισιο
CY20171101113T CY1119494T1 (el) 2008-07-10 2017-10-26 Κβαντισμος μεταβλητου δυφιορρυθμου για φιλτρο lpc και διαταξη και μεθοδος αντιστροφου κβαντισμου
CY20171101272T CY1119659T1 (el) 2008-07-10 2017-12-05 Διαταξη και μεθοδος κβαντισμου φιλτρου lpc πολλαπλων αναφορων

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Country Status (17)

Country Link
US (4) US8332213B2 (el)
EP (3) EP2301021B1 (el)
JP (2) JP2011527442A (el)
KR (2) KR101604774B1 (el)
CN (2) CN102119414B (el)
BR (1) BRPI0915450B1 (el)
CA (5) CA2729751C (el)
CY (3) CY1119501T1 (el)
DK (3) DK2313887T3 (el)
ES (3) ES2645375T3 (el)
HK (2) HK1153840A1 (el)
MX (1) MX2011000363A (el)
NO (1) NO2313887T3 (el)
PL (1) PL2313887T3 (el)
PT (3) PT2301021T (el)
RU (2) RU2509379C2 (el)
WO (3) WO2010003252A1 (el)

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