Circuit and method for speech recognition

A method of speech recognition comprising:

• detecting, by a voice detection circuit based on at least one input parameter, the presence of a voice signal in an input audio signal;
• generating, by the voice detection circuit an activation signal on each voice detection event;
• activating a speech recognition circuit by the activation signal;
• performing, by the speech recognition circuit, speech recognition on the input audio signal;
• generating, by the speech recognition circuit, an output signal indicating, based on the speech recognition, whether each voice detection event is true or false;
• generating, by the analysis circuit, a first value representing a true detection rate indicating the rate of true detection events among the total number of detection events generated by the voice detection circuit and/or a second value representing a false detection rate indicating the rate of false detection events among the total number of detection events generated by the voice detection circuit;
• and
• generating, by an analysis circuit, a control signal for modifying one or more of said input parameters based on a comparison of the first value with a first threshold value or of the second value with a second threshold value and/or on whether the first or second value is increasing or decreasing.