The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 2011
Filed:
Apr. 12, 2006
Method for adapting for an interoperability between short-term correlation models of digital signals
Mohamed Ghenania, Lannion, FR;
Claude Lamblin, Perros Guirec, FR;
Mohamed Ghenania, Lannion, FR;
Claude Lamblin, Perros Guirec, FR;
France Telecom, Paris, FR;
Abstract
The invention relates to the code conversion of digital signals, particularly voice signals, and in particular coding according to a second format from information obtained by carrying out a coding according to a first format. These first and second formats use LPC (linear predictive coding) short-term prediction models on digital signal sample blocks while using filters represented by respective LPC coefficients. The LPC coefficients of the second format are determined from an interpolation on the representative values of the LPC coefficients of at least the first format, between at least one given block and a preceding block. According to the invention, the interpolation (), is dynamically effected while selecting (), for each current block, at least one interpolation factor (α) among a preselection of factors according to a predetermined criterion such as a stationarity criterion of the digital signal ().