Signal synthesizer
First Claim
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1. A signal synthesizer, comprising:
- a high frequency synthesizer part including frequency increase means for increasing a prescribed frequency of a specific signal component to a frequency of a converted signal, said high frequency synthesizer part comprisingfirst extractor means, responsive to an input signal containing various analog signal components, for extracting from the input signal said specific signal component having said prescribed frequency and unfixed amplitude;
first converter means, coupled to said first extractor means, for converting said specific signal component into a converted signal so that the frequency of said converted signal corresponds to but is higher than the frequency of said specific signal component, and the amplitude of said converted signal is modulated by the amplitude of said specific signal component;
said first converter means including means for modulating the amplitude of said converted signal according to the amplitude of said specific signal component; and
mixer means, coupled to said first converter means and responsive to said input signal, for mixing said converted signal with said input signal to provide an output signal whose frequency spectrum covers the frequency spectra of said converted signal and said input signal.
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Abstract
To enhance low and high frequency components in a sound signal, low frequency components are used to generate new yet lower frequencies (subharmonics), and high frequency components are used to generate new yet higher frequencies (harmonics), the new frequencies added to the original signal thereby increasing the original signal bandwidth.
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Citations
8 Claims
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1. A signal synthesizer, comprising:
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a high frequency synthesizer part including frequency increase means for increasing a prescribed frequency of a specific signal component to a frequency of a converted signal, said high frequency synthesizer part comprising first extractor means, responsive to an input signal containing various analog signal components, for extracting from the input signal said specific signal component having said prescribed frequency and unfixed amplitude; first converter means, coupled to said first extractor means, for converting said specific signal component into a converted signal so that the frequency of said converted signal corresponds to but is higher than the frequency of said specific signal component, and the amplitude of said converted signal is modulated by the amplitude of said specific signal component; said first converter means including means for modulating the amplitude of said converted signal according to the amplitude of said specific signal component; and mixer means, coupled to said first converter means and responsive to said input signal, for mixing said converted signal with said input signal to provide an output signal whose frequency spectrum covers the frequency spectra of said converted signal and said input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification