Patent ID: 7013273

Claim:
A method of displaying text information corresponding to a speech portion of audio signals of television program signals as a closed caption an a video display device, the method comprising the steps of: decoding the audio signals of the television program; filtering the audio signals by using a spectral subtraction method to extract the speech portion; parsing the speech portion into discrete speech components in accordance with a speech model and grouping the parsed speech components employing a speaker dependent model to provide phonemes as the parsed speech components wherein the speaker dependent model employs a hidden Markov model; receiving a training text as a part of the television signal, the training text corresponding to a part of the speech portion of the audio signals; updating the hidden Markov model based on the training text and the part of the speech portion of the audio signals corresponding to the training text; applying the updated hidden Markov model to parse the speech portion of the audio signals to provide the phonemes; identifying words in a database corresponding to the grouped speech components; and converting the identified words into text data for display on the display device as the closed caption.