US 12,315,518 B2
Apparatus and method for improved concealment of the adaptive codebook in a CELP-like concealment employing improved pitch lag estimation
Jeremie Lecomte, Fuerth (DE); Michael Schnabel, Geroldsgruen (DE); Goran Markovic, Nuremberg (DE); Martin Dietz, Nuremberg (DE); and Bernhard Neugebauer, Erlangen (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., (DE)
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed on Jun. 30, 2022, as Appl. No. 17/810,132.
Application 17/810,132 is a continuation of application No. 16/445,052, filed on Jun. 18, 2019, granted, now 11,410,663.
Application 16/445,052 is a continuation of application No. 14/977,224, filed on Dec. 21, 2015, granted, now 10,381,011.
Application 14/977,224 is a continuation of application No. PCT/EP2014/062589, filed on Jun. 16, 2014.
Claims priority of application No. 13173157 (EP), filed on Jun. 21, 2013; and application No. 14166990 (EP), filed on May 5, 2014.
Prior Publication US 2022/0343924 A1, Oct. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/005 (2013.01); G10L 19/00 (2013.01); G10L 19/08 (2013.01); G10L 19/107 (2013.01); G10L 19/125 (2013.01); G10L 25/90 (2013.01)
CPC G10L 19/005 (2013.01) [G10L 19/107 (2013.01); G10L 19/125 (2013.01); G10L 25/90 (2013.01); G10L 2019/0002 (2013.01); G10L 2019/0003 (2013.01); G10L 2019/0008 (2013.01); G10L 19/08 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus for generating a speech signal, comprising:
a pitch lag estimator for estimating an estimated pitch lag, wherein the apparatus is generating the speech signal using the estimated pitch lag,
wherein the pitch lag estimator is configured to estimate the estimated pitch lag depending on a plurality of original pitch lag values and depending on a plurality of information values,
wherein, for each original pitch lag value of the plurality of original pitch lag values, an information value of the plurality of information values is assigned to said original pitch lag value,
wherein the pitch lag estimator is configured to estimate the pitch lag by determining two parameters a and b, by minimizing an error function:

OG Complex Work Unit Math
wherein a is a real number, wherein b is a real number, wherein s is a first integer, wherein k is a second integer, and wherein P(i) is the i-th original pitch lag 1value, wherein g˜(i) is the i-th pitch gain value being assigned to the i-th pitch lag value P(i).