Seek Digital Library
In this paper, the authors about a lip reading technique for speech recognition by using motion estimation analysis. It presents a user authentication system based on password lip reading. Motion estimation is done for lip movement image sequences representing speech. In this paper, the motion estimation is computed without extracting the speaker's lip contours and location. This leads to obtaining robust visual features for lip movements representing utterances. The proposed methodology comprises of two phases, a training phase and a recognition phase. In both the phases an n x n video frame of the image sequence for an utterance (password) is divided into m x m blocks.