IT1271959B - Codec per il parlato a predizione lineare eccitato da un libro di codici - Google Patents

Codec per il parlato a predizione lineare eccitato da un libro di codici

Info

Publication number
IT1271959B
IT1271959B ITMI930406A ITMI930406A IT1271959B IT 1271959 B IT1271959 B IT 1271959B IT MI930406 A ITMI930406 A IT MI930406A IT MI930406 A ITMI930406 A IT MI930406A IT 1271959 B IT1271959 B IT 1271959B
Authority
IT
Italy
Prior art keywords
codec
linear prediction
excited
book
speaking
Prior art date
Application number
ITMI930406A
Other languages
English (en)
Inventor
Giorgio Parladori
Marco Fratti
Silvio Cucchi
Antonio Rotunno
Luca Ponte
Original Assignee
Alcatel Italia
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 Alcatel Italia filed Critical Alcatel Italia
Priority to ITMI930406A priority Critical patent/IT1271959B/it
Publication of ITMI930406A0 publication Critical patent/ITMI930406A0/it
Priority to DE69424960T priority patent/DE69424960T2/de
Priority to EP94103204A priority patent/EP0614075B1/en
Publication of ITMI930406A1 publication Critical patent/ITMI930406A1/it
Application granted granted Critical
Publication of IT1271959B publication Critical patent/IT1271959B/it

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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • 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
    • G10L19/002—Dynamic bit allocation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Error Detection And Correction (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

La presente invenzione si riferisce ad un codec per il parlato a predizione lineare eccitato da un libro di codici.Trasmettendo, mediante una opportuna circuiteria, invece dei campioni di un segnale vocale, i parametri di un filtro ed il segnale da fornire all'ingresso del filtro per ottenere alla sua uscita il segnale vocale stesso, si ottiene una riduzione fortissima della quantità di dati da trasmettere.Alcuni dei blocchi componenti il codec sono, in aggiunta, realizzati utilizzando tecniche che permettono di ottenere particolari vantaggi per quanto riguarda la semplicità di calcolo e di realizzazione, il livello di compressione, il tasso di errore, e la banda di trasmissione del parlato.
ITMI930406A 1993-03-03 1993-03-03 Codec per il parlato a predizione lineare eccitato da un libro di codici IT1271959B (it)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ITMI930406A IT1271959B (it) 1993-03-03 1993-03-03 Codec per il parlato a predizione lineare eccitato da un libro di codici
DE69424960T DE69424960T2 (de) 1993-03-03 1994-03-03 Verfahren und Vorrichtung zur Sprachkodierung mit Trellis-kodierter Quantisierung für LPC- Quantisierung
EP94103204A EP0614075B1 (en) 1993-03-03 1994-03-03 Method and apparatus for speech coding using Trellis Coded Quantization for Linear Predictive Coding quantization

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI930406A IT1271959B (it) 1993-03-03 1993-03-03 Codec per il parlato a predizione lineare eccitato da un libro di codici

Publications (3)

Publication Number Publication Date
ITMI930406A0 ITMI930406A0 (it) 1993-03-03
ITMI930406A1 ITMI930406A1 (it) 1994-09-03
IT1271959B true IT1271959B (it) 1997-06-10

Family

ID=11365221

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI930406A IT1271959B (it) 1993-03-03 1993-03-03 Codec per il parlato a predizione lineare eccitato da un libro di codici

Country Status (3)

Country Link
EP (1) EP0614075B1 (it)
DE (1) DE69424960T2 (it)
IT (1) IT1271959B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3557255B2 (ja) * 1994-10-18 2004-08-25 松下電器産業株式会社 Ｌｓｐパラメータ復号化装置及び復号化方法
US6128346A (en) * 1998-04-14 2000-10-03 Motorola, Inc. Method and apparatus for quantizing a signal in a digital system
EP4439552B1 (en) * 2014-03-28 2025-09-24 Samsung Electronics Co., Ltd Device for quantization of linear prediction coefficient
ES2982894T3 (es) * 2014-05-07 2024-10-18 Industry Univ Cooperation Foundationhanyang Univ Erica Campus Dispositivo para cuantificar el coeficiente predictivo lineal
CN120783775B (zh) * 2025-09-08 2025-12-09 科大讯飞股份有限公司 音频编解码方法、电子设备及程序产品

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1184023B (it) * 1985-12-17 1987-10-22 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per la codifica e decodifica del segnale vocale mediante analisi a sottobande e quantizzazione vettorariale con allocazione dinamica dei bit di codifica
US4975956A (en) * 1989-07-26 1990-12-04 Itt Corporation Low-bit-rate speech coder using LPC data reduction processing

Also Published As

Publication number Publication date
ITMI930406A1 (it) 1994-09-03
ITMI930406A0 (it) 1993-03-03
EP0614075A2 (en) 1994-09-07
DE69424960T2 (de) 2001-01-11
EP0614075A3 (en) 1995-08-02
DE69424960D1 (de) 2000-07-27
EP0614075B1 (en) 2000-06-21

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19990226