Patent ID: 8874440

Claim:
A speech detection apparatus, comprising: a processor; a feature extracting unit configured to extract feature information from a frame containing audio information; an internal state determining unit configured to determine an internal state with respect to the frame based on the extracted feature information, the internal state comprising a speech state and environment information which comprises one or more environmental factors of an input signal corresponding to the frame; and an action determining unit configured to determine, based on the internal state, an action variable indicating at least one action related to speech detection of the frame and control speech detection according to the action variable, wherein, in response to the speech state being undetermined, the action variable comprises information indicating different additional feature information to be dynamically extracted from the frame based on the internal state of the frame, and the internal state determining unit is further configured to update a value of the internal state with respect to the current frame based on an internal state change model that predicts the probability of the internal state change differently based on a type of the action variable.