Patent ID: 9530432
Filing Date: 2016-12-27
CPC Classification: G10L

Claim Text:
1. A method for determining, in a speech dialogue system issuing speech prompts, a score value as an indicator for the presence of a wanted signal component in an input signal stemming from a microphone, comprising the steps of: using a first likelihood function to determine a first likelihood value for the presence of the wanted signal component in the input signal, using a second likelihood function to determine a second likelihood value for the presence of a noise signal component in the input signal, and determining, using a processor, a score value based on the first and the second likelihood values, wherein the first likelihood function is based on a predetermined reference wanted signal, and the second likelihood function is based on a predetermined reference noise signal, wherein the redetermined reference wanted signal is based on a first superposition signal obtained by superimposing at least one model wanted signal on at least one model prompt signal, and the predetermined reference noise signal is based on a second superposition signal obtained by superimposing at least one model noise signal on the at least one model prompt signal.