EP0402947A3 - Arrangement and method for encoding speech signal using regular pulse excitation scheme - Google Patents

Arrangement and method for encoding speech signal using regular pulse excitation scheme Download PDF

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Publication number
EP0402947A3
EP0402947A3 EP19900111360 EP90111360A EP0402947A3 EP 0402947 A3 EP0402947 A3 EP 0402947A3 EP 19900111360 EP19900111360 EP 19900111360 EP 90111360 A EP90111360 A EP 90111360A EP 0402947 A3 EP0402947 A3 EP 0402947A3
Authority
EP
European Patent Office
Prior art keywords
signal
circuit
cross
receive
speech 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
EP19900111360
Other languages
German (de)
French (fr)
Other versions
EP0402947A2 (en
EP0402947B1 (en
Inventor
Yoshihiro C/O Nec Corporation Unno
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
Priority claimed from JP1150770A external-priority patent/JPH0315900A/en
Priority claimed from JP1254458A external-priority patent/JP2900431B2/en
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP0402947A2 publication Critical patent/EP0402947A2/en
Publication of EP0402947A3 publication Critical patent/EP0402947A3/en
Application granted granted Critical
Publication of EP0402947B1 publication Critical patent/EP0402947B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/113—Regular pulse excitation

Abstract

A pre-processing circuit is provided to receive a discrete-time speech signal which are then divided into a plurality of frames. A parameter extracting circuit is coupled to a pre-processing circuit to which a discrete-­ time speech signal is applied and extracts a plurality of parameters therefrom. A impulse response calculating circuit is coupled to receive the plurality of parameters from the parameter extracting circuit, and generates an impulse response function signal using the plurality of parameters. An autocorrelation function circuit is coupled to receive the impulse response signal and generates an autocorrelation function signal using the signal applied. A cross-correlation function signal generates a cross-correlation function signal using the discrete-time speech signal and the autocorrelation function signal. A grid signal generator receive the output of the cross-correlation function calculating circuit, and outputs a grid signal indicative of a location of a first excitation pulse within one frame. A pulse amplitude calculating circuit receives the autocorrelation function signal, the cross-correlation function signal and the grid signal, and determines an amplitude sequence of excitation pulses within one frame.
EP19900111360 1989-06-14 1990-06-15 Arrangement and method for encoding speech signal using regular pulse excitation scheme Expired - Lifetime EP0402947B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP150770/89 1989-06-14
JP1150770A JPH0315900A (en) 1989-06-14 1989-06-14 Audio signal encoding device
JP1254458A JP2900431B2 (en) 1989-09-29 1989-09-29 Audio signal coding device
JP254458/89 1989-09-29

Publications (3)

Publication Number Publication Date
EP0402947A2 EP0402947A2 (en) 1990-12-19
EP0402947A3 true EP0402947A3 (en) 1991-10-23
EP0402947B1 EP0402947B1 (en) 1997-11-26

Family

ID=26480256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900111360 Expired - Lifetime EP0402947B1 (en) 1989-06-14 1990-06-15 Arrangement and method for encoding speech signal using regular pulse excitation scheme

Country Status (2)

Country Link
EP (1) EP0402947B1 (en)
DE (1) DE69031749T2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2084323C (en) * 1991-12-03 1996-12-03 Tetsu Taguchi Speech signal encoding system capable of transmitting a speech signal at a low bit rate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374941A2 (en) * 1988-12-23 1990-06-27 Nec Corporation Communication system capable of improving a speech quality by effectively calculating excitation multipulses

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374941A2 (en) * 1988-12-23 1990-06-27 Nec Corporation Communication system capable of improving a speech quality by effectively calculating excitation multipulses

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ICASSP'85 (IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, Tampa, Florida, 26th - 29th March 1985), vol. 1, pages 256-259, IEEE, New York, US; J.P. ADOUL et al.: "Generalization of the multipulse coding for low bit rate coding purposes: the generalized decimation" *
ICASSP'87 (1987 INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, Dallas, Texas, 6th - 9th April 1987), vol. 2, pages 968-971, IEEE, New York, US; A. FUKUI et al.: "Implementation of a multi-pulse speech codec with pitch prediction on a single chip floating-point signal processor" *
ICASSP'88 (1988 INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, New York, 11th - 14th April 1988), vol. 1, pages 227-230, IEEE, New York, US; P. VARY et al.: "Speech codec for the European mobile radio system" *

Also Published As

Publication number Publication date
DE69031749D1 (en) 1998-01-08
DE69031749T2 (en) 1998-05-14
EP0402947A2 (en) 1990-12-19
EP0402947B1 (en) 1997-11-26

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