Algebraic code-excited linear prediction speech coding method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5717825
SERIAL NO

08682721

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The method uses the technique of CELP coding with algebraic codebook. The search for the CELP excitation includes a calculation of certain components of the covariance matrix U=H.sup.T .multidot.H where H denotes a lower triangular Toeplitz matrix formed on the basis of the impulse response of a compound filter made up of synthesis filters and of a perceptual weighting filter. The memory-stored components of the covariance matrix are only those of the form U(pos.sub.i,p,pos.sub.i,p) and those of the form U(pos.sub.i,p, pos.sub.j,q), pos.sub.i,p and pos.sub.j,q respectively denoting position i and position j for the pulses p and q in the codes of the algebraic codebook.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
FRANCE TELECOM75015 PARIS

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lamblin, Claude Perros Guirec, FR 20 258

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation