초록 ▼

Method 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 spectragra

Method 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.

대표청구항 ▼

A method of classifying broadcast information, comprising the steps of: receiving broadcast information; performing a spectral analysis of said information and providing a plurality of analyzed waveforms corresponding thereto; generating a spectragram from said waveforms; comparing the generated spe

A method of classifying broadcast information, comprising the steps of: receiving broadcast information; performing a spectral analysis of said information and providing a plurality of analyzed waveforms corresponding thereto; generating a spectragram from said waveforms; comparing the generated spectragram with a plurality of predetermined first stage reference spectragrams; queueing the first stage reference spectragrams in order of their similarity to said generated spectragram; correlating at least one of a plurality of predetermined second stage reference patterns which correspond to said first stage reference spectragrams with one of said analyzed waveforms in the queueing order established in the queueing step to provide a correlation value for each of the correlated second stage reference patterns; monitoring said correlating step to determine when one of said correlation values exceeds a threshold correlation value; identifying the second stage reference pattern which corresponds to the correlation value which exceeds said threshold value; and classifying the broadcast information as similar to the identified second stage reference pattern.