Data processing: measuring – calibrating – or testing – Measurement system – Measured signal processing
Reexamination Certificate
2002-08-09
2004-06-01
Barlow, John (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Measured signal processing
C381S058000
Reexamination Certificate
active
06745155
ABSTRACT:
This invention relates to an apparatus for estimating frequency properties as in the preamble of claim 1. Furthermore, the invention relates to an apparatus for estimating the spectrum of a signal as in the preamble of claim 7. The invention further relates to a signal recognition system, a data compression system and a signal improvement system device including such apparatuses and methods for performing functions of the apparatus.
Apparatuses as described above, are known from the article “Using an Auditory Model and Leaky Autocorrelators to Tune In to Speech” by T. Andringa, published in ESCA Eurospeech 97, Rhodes, Greece, ISSN 1018-4074, pp. 2859-2862. From this Andringa 1997 article, it is known to make use of an auditory model which imitates the working principles of the basilar membrane. The output of the segments of the model is used as an input for a set of leaky autocorrelator units which are tuned to a particular, fixed, periodicity. The activity of the responsive autocorrelator units as a function of the segment number is then a direct measure for the spectrum of the periodic signal to be detected.
With the apparatus described in this prior art document, it is possible to reconstruct an energy spectrum of a signal whose fundamental period is both known and constant. However, a problem presents itself in that the known device does not provide for the correct and or optimal reconstruction of the energy spectrum when the period is unknown, is not constant, or both. The object of the invention is to provide a device which enables a correct reconstruction of the signal when the period of the sound signal is unknown and/or is not constant.
In a first aspect of the invention to that end the invention provides a device as claimed in claim 1. In a second aspect of the invention to that end the invention provides a device as claimed in claim 8.
REFERENCES:
patent: 4441202 (1984-04-01), Tong et al.
patent: 4515158 (1985-05-01), Patrick et al.
patent: 5473759 (1995-12-01), Slaney et al.
patent: 5856722 (1999-01-01), Haronian et al.
patent: 5879283 (1999-03-01), Adams et al.
patent: 6072885 (2000-06-01), Stockham et al.
patent: 6092422 (2000-07-01), Binnig et al.
patent: 6501399 (2002-12-01), Byrd
patent: 6651041 (2003-11-01), Juric
Andringa Tjeerd Catharinus
Duifhuis Hendrikus
Heemskerk Michael Gerardus
Nillesen Maartje Marjolein
van Hengel Pieter Willem J.
Barlow John
Huq Speech Technologies B.V.
Michaelson Peter L.
Michaelson & Associates
Raymond Edward
LandOfFree
Methods and apparatuses for signal analysis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatuses for signal analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatuses for signal analysis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3357444