Asulab S.a.

Stmicroelectronics N.v.

Michael Ansorge

Giuseppina Biundo Lotito

Benito Carnero

Fr&eacute;d&eacute;ric Barman

Javier Bracamonte

Fausto Pellandini

The speech is sampled in such a way as to obtain successive voice frames each including a predetermined number of samples, and with each voice frame are determined parameters of a code-excited linear prediction model. The parameters include a long-term excitation digital word vextracted from an adaptive coded directory LTD, and an associated long-term gain Ga, as well as a short-term excitation word cj extracted from a fixed coded directory STD and an associated short-term gain Gc. The product of the long-term excitation extracted word times the associated long-term gain is summed SM with the product of the short-term excitation extracted word times the associated short-term gain. The summed digital word is filtered in a low-pass filter FLCT having a cutoff frequency greater than a quarter of the sampling frequency and less than a half of the latter, and the adaptive coded directory is updated with the filtered word.

Method and device for encoding wideband speech

Process for controlling the compression ratio of digital images

Growing community of inventors

Hauterive, Switzerland

Michael Ansorge