High-speed signal search method, device, and recording medium for the same
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Abstract
The object of the present invention is to provide a high-speed signal search method, device, and a recording medium for the same that can obtain detection results equivalent to precisely moving a window over the entire region of the input signal even when there is not precise movement of a window over the entire signal. The present invention provides a first step that generates a feature quantity sequence for a pre-recorded reference signal; a second step that sets the input signal window for the input signal that has been input; a third step that generates a feature quantity sequence for the input signal of this input signal window; a fourth step that calculates the input signal similarity value showing the degree of similarity between the feature quantity sequence generated in the first step and the feature quantity sequence generated in the third step; a fifth step that calculates the skip width showing the amount that the input signal can be moved; and a sixth step that determines the position of the input signal window based on the skip width calculated in the fifth step, sets the input signal window to this position, and calculates the input signal similarity value for each position of the input signal window by repeating the third step to the sixth step; and further, determines whether or not the reference signal exists at the position that the input signal window presently shows in the input signal based on the result of comparing the input signal similarity value and the predetermined threshold value.
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Citations
28 Claims
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1-18. -18. (canceled)
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19. A high-speed signal search method characterized in providing:
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a first step that generates a feature quantity sequence for a plurality of pre-recorded reference signals;
a second step that generates a feature quantity sequence for the input signal that has been input;
a third step that sets the input signal window for the feature quantity sequence generated in the second step;
a fourth step that calculates an inter-reference signal similarity value that shows the degree of similarity between the feature quantity sequence related to a former reference signal and the feature quantity sequence related to a later reference signal for two reference signals among the plurality of reference signals;
a fifth step that calculates the input signal similarity value showing the degree of similarity between the feature quantity sequence generated in the first step and the feature quantity sequence in the said input signal window for each reference signal among said plurality of reference signals;
a sixth step that calculates a skip width showing the amount that the input signal window can move based on the inter-reference signal similarity value calculated in the fourth step and the input signal similarity value calculated in the fifth step; and
a seventh step that determines the position of the input signal window based on the skip width calculated in the sixth step and sets the input signal window at that position; and
further,calculates an input signal similarity value for each position of the input signal window by repeating the fifth step to the seventh step; and
determines whether or not the reference signal exists at the position that the input signal window presently shows in the input signal based on the result of comparing the input signal similarity value and the predetermined threshold value. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A high-speed signal search method characterized in providing:
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a first step that generates a feature quantity sequence for a plurality of pre-recorded reference signals;
a second step that produces histograms for the feature quantity sequences generated in the first step;
a third step that generates a feature quantity sequence for an input signal that has been input;
a fourth step that sets the input signal window for the feature quantity sequence generated in the third step;
a fifth step that produces histograms for the feature quantity sequences of the input signal window;
a sixth step that calculates an inter-reference signal similarity value showing the degree of similarity between the histogram related to a former reference signal and the histogram related to a later reference signal for two reference signals among the plurality of reference signals;
a seventh step that calculates the input signal similarity value showing the degree of similarity between the histograms generated in the second step and the histograms generated in the fifth step for each reference signal among the plurality of reference signals;
an eighth step that calculates a skip width showing the amount that the input signal window can move based on the inter-reference signal similarity value calculated in the sixth step and the input signal similarity value calculated in the seventh step; and
a ninth step which determines the position of the input signal window based on the skip width calculated in the eighth step and sets the input signal window to this position; and
furthercalculates the input signal similarity value based on each position of the input signal window by repeating the fifth step to the ninth step; and
determines whether or not the reference signal exists at the position that the input signal window presently shows in the input signal based on the result of comparing the input signal similarity value and the predetermined threshold value. - View Dependent Claims (26, 27)
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28-39. -39. (canceled)
Specification