1. In a computing system comprising a microphone array and an image sensor, a method of operating a speech recognition input system, the method comprising: receiving speech recognition data comprising a recognized speech segment, acoustic locational data related to a location of origin of the recognized speech segment as determined via signals from the microphone array, and confidence data comprising a recognition confidence value; receiving image data comprising visual locational information related to a location of each person located in a field of view of the image sensor; comparing the acoustic locational data to the visual locational data to determine whether the recognized speech segment originated from a person in the field of view of the image sensor; and adjusting the confidence data based upon whether the recognized speech segment is determined to have originated from a person in the field of view of the image sensor.