Automatic continuous speech recognition system employing dynamic programming
Voice verification system based on word pronunciation
Method and device for detecting the similarity between standard and unknown patterns
Pulse repetition interval autocorrelator system
Pre-processing system for speech recognition
Broadcast program identification method and system
Pattern recognition with a warping function decided for each reference pattern by the use of feature vector components of a few channels
Training circuit for audio signal recognition computer
Pattern recognition system for hand-written characters operating on an on-line real-time basis
ApplicationNo. 07/066106 filed on 06/24/1987
US Classes:702/73, Identification of waveform708/5, Correlation, convolution, or transformation725/22COMMERCIAL OR PROGRAM AIRING VERIFICATION SYSTEM
ExaminersPrimary: Lall, Parshotam S.
Assistant: Teska, Kevin J.
Attorney, Agent or Firm
International ClassesG10L 15/00 (20060101)
H04H 9/00 (20060101)
AbstractMethod and apparatus for classifying broadcast information first receives the broadcast information and processes it to provide a plurality of a low bandwidth analyzed waveforms. The analyzed waveforms are used to generate a spectragram which is then compared with a plurality of reference spectragrams stored in a first stage reference library. The first stage reference spectragrams are then queued in order of their similarity to the generated spectragram. Next, a plurality of second stage reference patterns, which correspond to the first stage reference spectragrams, are correlated with one of the analyzed waveforms in the queueing order established previously. A correlation value is provided for each second stage reference pattern stored in the second stage reference library. When it is determined that a correlation value exceeds the threshold value, a recognition is declared and the broadcast information is classified as similar to the second stage reference pattern whose correlation value exceeds the threshold. The analyzed waveform used in the second stage classification may be time warped to account for speed fluctuations in the broadcast information.