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 as an output from a speech recognition stage of an audio processing pipeline, the speech recognition data comprising a recognized speech segment and confidence data comprising a recognition confidence value that represents a confidence in a certainty of a match of the recognized speech segment to a speech pattern; receiving acoustic locational data as an output from a digital audio processing stage of the audio processing pipeline, the acoustic locational data related to a location of origin of the recognized speech segment as determined via signals from the microphone array; 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 information 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.