Raymond L Greenfield

Title: The Innovations of Raymond L Greenfield

Introduction

Raymond L Greenfield is a notable inventor based in London, Canada. He has made significant contributions to the field of technology, particularly in video signal processing and electromagnetic emission monitoring. With a total of 3 patents to his name, Greenfield's work showcases his innovative spirit and technical expertise.

Latest Patents

One of Greenfield's latest patents focuses on digital video signal compression. This invention involves compressing digital samples of an HDTV video signal by determining groups of three successive samples in the video signal lines. The groups in adjacent lines are offset from one another, and only the first sample in each group is transmitted. The second and third samples are compared with magnitudes averaged from three adjacent, transmitted first samples to determine the closest match. A 2-bit code representing this closest match is then transmitted for each of these samples. This method provides a high compression ratio, which can be further enhanced by DPCM encoding of the successive first samples.

Another significant patent by Greenfield is a method and apparatus for monitoring electromagnetic emission levels. This invention monitors electromagnetic emissions from a printed circuit board by energizing the board while it is located adjacent to an array of electromagnetic emission measuring probes. The probes are successively addressed, and the currents induced in the probes are measured at a receiver. A memory map of the electromagnetic emission as a function of board position is generated and displayed alongside the circuit board layout, allowing for the identification of regions with high emission levels.

Career Highlights

Throughout his career, Greenfield has worked with various companies, including Northern Telecom Limited. His experience in the industry has allowed him to develop and refine his innovative ideas, leading to the successful patenting of his inventions.

Collaborations

Greenfield has collaborated with notable individuals such as Richard R Goulette and Alan Frank Graves. These partnerships have contributed to the advancement of his projects and the successful implementation of his inventions.

Conclusion

Raymond L Greenfield's contributions to technology through his patents demonstrate his innovative capabilities and commitment to advancing the field. His work in digital video signal compression and electromagnetic emission monitoring highlights the importance of innovation in modern technology.