High-speed signal search method, device, and recording medium for the same
First Claim
1. A high-speed signal search method characterized in providing:
- a first step that generates a feature quantity sequence for a pre-recorded reference signal;
a second step that sets the reference signal window for the feature quantity sequence generated in the first step;
a third step that partitions the reference signal window set in the second step into a plurality of partitioned reference signal windows;
a fourth step that generates a feature quantity sequence for the input signal that has been input;
a fifth step that sets the input signal window for the feature quantity sequence generated in the fourth step;
a sixth step that partitions this input signal window into a plurality of partitioned input signal windows corresponding to the plurality of partitioned reference signal windows;
a seventh step that calculates the input signal similarity value showing the degree of similarity between the feature quantity sequence of each reference signal partition window and the feature quantity sequence in the partitioned input signal windows corresponding to the relevant partitioned reference signal window;
an eighth step that calculates a skip width indicating the amount that the input signal window can be moved based on 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 at that position; and
further,calculates an input signal similarity value for each position of the input signal window by repeating the sixth 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.
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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
9 Claims
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1. A high-speed signal search method characterized in providing:
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a first step that generates a feature quantity sequence for a pre-recorded reference signal; a second step that sets the reference signal window for the feature quantity sequence generated in the first step; a third step that partitions the reference signal window set in the second step into a plurality of partitioned reference signal windows; a fourth step that generates a feature quantity sequence for the input signal that has been input; a fifth step that sets the input signal window for the feature quantity sequence generated in the fourth step; a sixth step that partitions this input signal window into a plurality of partitioned input signal windows corresponding to the plurality of partitioned reference signal windows; a seventh step that calculates the input signal similarity value showing the degree of similarity between the feature quantity sequence of each reference signal partition window and the feature quantity sequence in the partitioned input signal windows corresponding to the relevant partitioned reference signal window; an eighth step that calculates a skip width indicating the amount that the input signal window can be moved based on 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 at that position; and
further,calculates an input signal similarity value for each position of the input signal window by repeating the sixth 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 (2, 3, 4, 5, 6)
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7. A high-speed signal search method characterized in providing:
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a first step that generates a feature quantity sequence for a pre-recorded reference signal; a second step that sets a reference signal window for the feature quantity sequence generated in the first step; a third step that partitions the reference signal window set in the second step into a plurality of partitioned reference signal windows; a fourth step that generates a feature quantity sequence for the input signal that has been input; a fifth step that sets the input signal window for the feature quantity sequence generated in the fourth step; a sixth step that partitions this input signal window into a plurality of partitioned input signal windows corresponding tot his plurality of partitioned reference signal windows; a seventh step that produces a histogram of the feature quantity sequence of each partitioned reference signal window; an eighth step that produces a histogram of a feature quantity sequence of each partitioned input signal window; a ninth step that calculates the input signal similarity value showing the degree of similarity between the histogram of each partitioned reference signal window and the histogram of the partitioned input signal window corresponding to the relevant partitioned reference signal window; a tenth step that calculates the skip width showing the amount that the input signal window can move based on the input signal similarity value calculated in the ninth step; and an eleventh step that determines the position of the input signal window 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 sixth step to the eleventh 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 (8, 9)
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Specification