Boots – shoes – and leggings
Patent
1991-08-05
1992-08-04
Mai, Tan V.
Boots, shoes, and leggings
36472419, G06F 1531
Patent
active
051365316
ABSTRACT:
A method of detecting a wideband tone, having a nominal frequency but occurring anywhere within a wide range of frequencies, includes a step of bandpass filtering input data. The bandpass-filtered data is used to predict a value of the input data using an algorithm such as least-mean-squares (LMS) adaptive linear prediction. An error signal is provided as a difference between the actual and predicted values of the input data. By computing the power in the error signal, the presence or absence of a tone can be detected, because a tone causes a smaller prediction error and power than other, non-tone processes such as white noise. A high-to-low transition in power represents a start of a tone, whereas a low-to-high transition in power represents an end of a tone. A tone flag signal is provided in response to a predetermined relationship between two power computations, such as a low-to-high transition.
REFERENCES:
patent: 4791390 (1988-12-01), Harris et al.
patent: 4989170 (1991-01-01), Batruni et al.
patent: 5058047 (1991-10-01), Chung
Feintuch, "An Adaptive Recursive LMS Filter", Proc. of the IEEE, Nov. 1976, pp. 1622-1624.
Thompson, "A Contrained Recursive Adaptive Filter for Enhancement of Narrowband Signals in White Noise", Conference: Conference Record of the Twelfth Asilomar Conference on Circuits, Systems and Computers, Pacific Grove, Calif., USA (Nov. 6-8, 1978).
Hush, et al., "An Adaptive IIR Structure for Sinusoidal Enhancement, Frequency Estimation, and Detection", vol. 34/No.6 IEEE Transactions on Acoustics, Speech, and Signal Processing, Dec. 1986, pp. 1380-1389.
Mai Tan V.
Motorola Inc.
Polansky Paul J.
LandOfFree
Method and apparatus for detecting a wideband tone does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for detecting a wideband tone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting a wideband tone will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-784439