Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Patent
1997-08-01
1999-02-02
Nu Ton, My-Trang
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
327557, 327558, 327559, H03B 100, H03K 500
Patent
active
058670580
ABSTRACT:
A method and system for enhancing a digital input signal and producing a modified digital output signal that can either be further digitally processed or that can be converted to an analog signal. A digital input signal passes through a low-pass filter, a high-pass filter and a bandpass filter. A digital signal emitted from a high-pass section of the bandpass filter is delivered to a dynamically-controlled multiplier operating in a digital domain. Digital signals emitted from the low-pass filter, the high-pass filter and the bandpass filter are summed with a signal multiplied by the dynamically-controlled multiplier. A process controller and a contour controller can be used to vary low-frequency boost and high-frequency boost delivered by the modified digital input signal which can then be converted to an analog audio output sample.
REFERENCES:
patent: 4758903 (1988-07-01), Noguchi et al.
patent: 5300838 (1994-04-01), Elizondo
patent: 5349381 (1994-09-01), Murayama et al.
Nu Ton My-Trang
Zenith Electronics Corporation
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