Company Filing History:
Years Active: 1984-1988
Title: Walter H. Demmer: Innovator in Digital Signal Processing
Introduction
Walter H. Demmer is a notable inventor based in Hamburg, Germany. He has made significant contributions to the field of digital signal processing, holding a total of 9 patents. His work has had a profound impact on various applications, particularly in video signal processing.
Latest Patents
One of his latest inventions is a digital low-pass filter with improved frequency reduction characteristics. This invention relates to a digital low-pass filter that effects a frequency reduction by a factor equal to the ratio w/2 between the frequency of the input signal and the frequency of the output signal, where w is an odd integer. The input signal is applied to m series-arranged registers, and the input signal of the first and the output signals of all the registers are multiplied by coefficients. A change-over switch precedes an input of each multiplier, switching the coefficients symmetrically. The filter is particularly suitable for use in video signal processing, reducing negative influences of an analog-to-digital converter.
Another significant patent is a correlator designed to generate an output signal that assumes an extreme value in the case of a pulse. The correlator comprises a chain of at least two cascaded delay members, with the first receiving the input signal. Each delay member is associated with a pulse and pulse-free interval, and all but at most one delay member can store all sampling values of the associated pulse or pulse-free interval. The output signal of the correlator is formed by a combination circuit that linearly combines and integrates the signals.
Career Highlights
Walter H. Demmer has worked with U.S. Philips Corporation, where he has been able to apply his innovative ideas in practical applications. His expertise in digital signal processing has positioned him as a key figure in the development of advanced technologies.
Collaborations
Throughout his career, Demmer has collaborated with notable colleagues such as Otto L. Warmuth and Detlef W. Oldach. These collaborations have further enriched his work and contributed to the advancement of technology in his field.
Conclusion
Walter H. Demmer's contributions to digital signal processing through his patents and collaborations have established him as a significant inventor in the industry. His innovative solutions continue to influence the field and pave the way for future advancements.
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