Method and system for assessing intelligibility of speech represented by a speech signal

A non-transitory, computer-readable medium loadable on a processing unit so as to execute a method for assessing intelligibility of speech represented by a speech signal, the method comprising the following steps:

• performing a feature extraction on at least one frame of a speech signal so as to obtain a feature vector for each of the at least one frame of the speech signal;
• inputting the feature vector to a statistical machine learning model so as to obtain an estimated posterior probability of phonemes in the at least one frame as an output including a vector of phoneme posterior probabilities of different phonemes for each of the at least one frame of the speech signal;
• performing an entropy estimation on the vector of phoneme posterior probabilities of the at least one frame of the speech signal so as to evaluate intelligibility of the at least one frame of the speech signal;
• and
• outputting an intelligibility measure for the at least one frame of the speech signal.

A speech recognition system for assessing intelligibility of speech represented by a speech signal, the system comprising:

• a processor configured to perform a feature extraction on at least one frame of an input speech signal so as to obtain a feature vector for each of the at least one frame of the speech signal;
• a statistical machine learning model portion configured to receive the feature vector as an input and determine an estimated posterior probability of phonemes in the at least one frame as an output including a vector of phoneme posterior probabilities for different phonemes for each of the at least one frame of the speech signal;
• an entropy estimator configured to perform an entropy estimation on the vector of phoneme posterior probabilities of the at least one frame of the speech signal so as to evaluate intelligibility of the at least one frame of the speech signal;
• and
• an output unit configured to provide an intelligibility measure for the at least one frame of the speech signal.