Boots – shoes – and leggings
Patent
1988-04-06
1989-06-13
Malzahn, David H.
Boots, shoes, and leggings
G06F 15332
Patent
active
048398446
ABSTRACT:
Apparatus for obtaining an orthogonal transformer for use in signal analysis. This apparatus is especially useful in cepstral analysis where vocal tract characteristics of a signal are separated from a sound source. A buffer memory 10 temporarily stores input time series data and an orthogonal transformation is carried out by an orthogonal transform means 20 by multiplying each predetermined data read sequentially out of the buffer memory 10 by a predetermined twiddle factor. A controller 30 is used to specify the data read out of the buffer memory 10 and for giving the twiddle factor a value of 1 and r/2.sup.l corresponding to the magnitude of the real and imaginary part of the twiddle factor. Cepstrum information is obtainable using simple hardware to analyze the data generated by the orthogonal transformer.
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patent: 4554629 (1985-11-01), Smith, Jr.
Shum, "Speech Processing With Walsh-Hadamard Trans Forms" IEEE Trans. on Audio & Electroacoustics vol. Au-21, No. 3, Jun. 1973, pp. 174-179.
Malzahn David H.
NEC Corporation
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