Information retrieving method and apparatus
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Abstract
A speaker of encoded speech data recorded in a semiconductor storage device in an IC recorder is to be retrieved easily. An information receiving unit 10 in a speaker retrieval apparatus 1 reads out the encoded speech data recorded in a semiconductor storage device 107 in an IC recorder 100. A speech decoding unit 12 decodes the encoded speech data. A speaker frequency detection unit 13 discriminates the speaker based on a feature of the speech waveform decoded to find the frequency of conversation (frequency of occurrence) of the speaker in a preset time interval. A speaker frequency graph displaying unit 14 displays the speaker frequency on a picture as a two-dimensional graph having time and the frequency as two axes. A speech reproducing unit 16 reads out the portion of the encoded speech data corresponding to a time position or a time range specified by a reproducing position input unit 15 based on this two-dimensional graph from the storage device 11 and decodes the read-out data to output the decoded data to a speech outputting unit 17.
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Citations
20 Claims
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1-12. -12. (canceled)
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13. An information retrieving apparatus for retrieving information on a speaker from encoded speech data, said apparatus comprising:
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means for determining a speaker for each recognition interval based on a feature of said encoded speech data; and wherein the means for determining the speaker in each interval is comprised of means for extracting only LSP information from the encoded speech data, decoding the extracted information, converting the decoded information into LPC cepstrum coefficients and evaluating vector quantization distortion.
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14. An information retrieving method for retrieving information on a speaker, from encoded speech data, said method comprising:
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a speaker frequency detecting step of determining the speaker for each recognition interval based on a feature of said encoded speech data; and wherein the speaker frequency detecting step for determining the speaker of the recording in each interval is comprised of extracting only LSP information from the encoded speech data, decoding the extracted information, converting the decoded information into LPC cepstrum coefficients and evaluating vector quantization distortion; a speaker frequency graph outputting step of outputting and displaying the frequency of occurrence of each speaker detected for each of said intervals as two-dimensional graphical data having time and the frequency of occurrence as two axes on an output image, wherein the image provides a numeric percentage representative of the speaker frequency for the interval. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An information retrieving apparatus for retrieving information on a speaker from encoded speech data, said apparatus comprising:
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means for determining a speaker for each recognition interval based on a feature of said encoded speech data; and wherein the means for determining the speaker in each interval is comprised of means for extracting only LSP information from the encoded speech data, decoding the extracted information, converting the decoded information into LPC cepstrum coefficients and evaluating vector quantization distortion; means for outputting step of outputting and displaying the frequency of occurrence of each speaker detected for each of said intervals as two-dimensional graphical data having time and the frequency of occurrence as two axes on an output image, wherein the image provides a numeric percentage representative of the speaker frequency for the interval.
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Specification