Apparatus for encoding a speech signal employing ACELP in the autocorrelation domain

US10170129B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Tom Baeckstroem · Nuremberg, DE
• Markus Multrus · Nuremberg, DE
• Guillaume Fuchs · Erlangen, DE
• Christian Helmrich · Erlangen, DE
• Martin Dietz · Nuremberg, DE

Key dates

• Filing date: Apr 3, 2015
• Grant date: Jan 1, 2019
• Expiry date: Apr 3, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L2019/0001
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for encoding a speech signal by determining a codebook vector of a speech coding algorithm is provided. The apparatus includes a matrix determiner for determining an autocorrelation matrix R, and a codebook vector determiner for determining the codebook vector depending on the autocorrelation matrix R. The matrix determiner is configured to determine the autocorrelation matrix R by determining vector coefficients of a vector r, wherein the autocorrelation matrix R includes a plurality of rows and a plurality of columns, wherein the vector r indicates one of the columns or one of the rows of the autocorrelation matrix R, wherein R(i, j)=r(|i−j|), wherein R(i, j) indicates the coefficients of the autocorrelation matrix R, wherein i is a first index indicating one of a plurality of rows of the autocorrelation matrix R, and wherein j is a second index indicating one of the plurality of columns of the autocorrelation matrix R.