2. The voice control device of claim 1 , wherein the speech command recognizer includes a predefined command set which is consistently used during the speech command recognition, and determines the recognized speech command according to at least the predefined command set.
1. A voice control device, comprising: a speech command recognizer, arranged for performing speech command recognition to output a recognized speech command; a sensor data processor, arranged for processing sensor data generated from at least one auxiliary sensor to determine a motion of a mobile device comprising the voice control device, to generate a detection output; and a decision making circuit, arranged for deciding a response of the voice control device according to the recognized speech command and the detection output; wherein when the detection output indicates a first motion of the mobile device, the voice control device has a first response for the recognized speech command; and when the detection output indicates a second motion of the mobile device, the voice control device has a second response for the same recognized speech command, where the second motion is different from the first motion, and the second response is different from the first response.