Method for determining a characteristic data record for a data signal
AssigneeCreaholic S.A.
InventorChristoph Dworzak
Life of this patent
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Abstract
According to the method according to the invention for determining a characteristic data set (“fingerprint”) for a sound signal, the sound signal itself is searched through for characteritsic locations, and these characetristics locations are used for producing a characteritsic data set. For this the frequency spectrum is evaluated over a time interval, subdivided into frequency bands and averaged over each frequency band into a value. The fingerprint then consists of data which has been obtained from these values after possible further averagings, wherein only data is included which belongs to certain time segments
Claims19
A method for determining a characteristic data set for a data signal which is present as a function of time, wherein the data signal itself is searched through for characteristic locations and these characteristic locations are used for producing a characteristic data set, with the following steps:
- setting time intervals i
- transforming the data signal in the intervals i into the frequency domain
- averaging the thus obtained frequency spectrum over frequency ranges into discrete values Ai,n for each interval i
- selecting a time domain as a characteristic location by way of information gained from the data signal or the values Ai,n wherein the time domain comprises several intervals i, and
- evaluating characteristic data from the values Ai,n of the intervals lying in the time domain.
A method according to one of the preceding claims, characterised in that the transformation of the signal into the frequency domain is carried out with a numeric Fourier transformation or with a Hartley transformation.
A method according to one of the preceding claims, characterised in that at least one of the method steps is carried out in an analog-electronic manner.
A method for determining a characteristic data set for a data signal, which is present as a function of a parameter t, wherein the data signal itself is searched through for characteristic locations and these characteristic locations are used for producing a characteristic data set, with the following steps:
- setting parameter intervals i,
- transforming the data signal with respect to the parameter t in the intervals i, into a corresponding frequency domain,
- averaging the thus obtained spectrum to discrete values Ai,n for each interval i,
- selecting a parameter range as a characteristic location by way of information obtained from the data signal or the values Ai,n, wherein the parameter range comprises several intervals i, and
- evaluating characteristic data from the values Ai,n of the intervals lying in the parameter range.
A storage medium with a computer program stored thereon, which comprises means to permit a computer to carry out methods for determining a characteristic data set for a data signal which is given as a function of a parameter, for example time, with the following steps:
- setting parameter intervals i
- numerically determining a spectrum of the data signal in the intervals i
- averaging the thus obtained spectrum into discrete values Ai,n for each interval i
- selecting a parameter range as a characteristic location by way of information gained from the data signal or from the values Ai,n wherein the parameter range comprises several intervals, and
- evaluating characteristic data from the values Ai,n of the intervals lying in the parameter range.
A computer program with means to permit a computer to carry out a method for determining a characteristic data set for a data signal which is given as a function of a parameter, for example time, with the following steps:
- setting parameter intervals i
- numerically determining a spectrum of the data signal in the intervals i
- averaging the thus obtained spectrum into discrete values Ai,n for each interval i
- selecting a parameter range as a characteristic location by way of information gained from the data signal or from the values Ai,n, wherein the parameter range comprises several intervals, and
- evaluating characteristic data from the values Ai,n of the intervals lying in the parameter range.
A computer program product with a computer-readable medium containing computer-readable program code means in order to permit a computer to carry out a method for determining a characteristic data set for a data signal which is given as a function of a parameter, for example time, with the following steps:
- setting parameter intervals i
- numerically determining a spectrum of the data signal in the intervals i
- averaging the thus obtained spectrum into discrete values Ai,n for each interval i
- selecting a parameter range as a characteristic location by way of information gained from the data signal or from the values Ai,n, wherein the parameter range comprises several intervals, and
- evaluating characteristic data from the values Ai,n of the intervals lying in the parameter range.
Dependencies are inferred from the claim text.