This inventor holds 5 USPTO granted patents. Top assignees: Abekas Video Systems Limited, Sony Corporation. Active years: 1990-1991.
Location History:
- Hampshire, GB (1990)
- Andover, GB (1990 - 1991)
Company Filing History:
Years Active: 1990-1991
Title: David F Levy: Innovator in Digital Video Technology
Introduction
David F Levy is a notable inventor based in Andover, GB. He has made significant contributions to the field of digital video technology, holding a total of 5 patents. His work focuses on improving the quality and efficiency of digital video signals, particularly in color television.
Latest Patents
One of his latest patents is a method and apparatus for keying a digital video signal. This invention addresses the issue of 'stairstepping' of pixels at the edges of the key while ensuring a hard switch between keyed scenes. The method involves comparing successive digital keying signals with a desired digital clip level. If the clip level occurs between two successive digital signals, an interpolation of the clip level is created fractionally. This allows keying to be accomplished on a sub-pixel basis without increasing the frequency of sampling.
Another significant patent focuses on the processing of color video signals. This method enables keying of digital color TV signals without exceeding the normal sampling frequency of 13.5 MHz and without degrading the image quality. The digital keying signal and the digital color TV signal are supplied to upsamplers, which double the sampling frequency through linear interpolation. The outputs are then keyed and processed to ensure that the invention remains 'transparent' to the viewer in the absence of high-frequency keying signals.
Career Highlights
David has worked with several prominent companies in the industry, including Abekas Video Systems Limited and Sony Corporation. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in digital video technology.
Collaborations
Throughout his career, David has collaborated with notable individuals such as Mark R Andrews and Martin G Snashall. These partnerships have further enriched his work and led to advancements in the field.
Conclusion
David F Levy is a distinguished inventor whose contributions to digital video technology have made a lasting impact. His innovative patents and collaborations reflect his commitment to enhancing the quality of digital media.