Jung Wan Ko

Title: Innovations of Jung Wan Ko

Introduction

Jung Wan Ko is a notable inventor based in Suwon, South Korea. He has made significant contributions to the field of video technology, holding a total of five patents. His work primarily focuses on enhancing video signal processing and playback systems.

Latest Patents

One of his latest patents involves a video signal encoded with additional detail information. In this invention, video tape recording apparatus separates composite video signals into their luminance and chrominance components for processing prior to recording. The luminance components are digitized, adaptively filtered, and transformed into a reduced frequency spectrum to generate a digital signal. This signal is then converted to analog form to modulate the frequency of the luminance carrier signal used in video tape recording. The chrominance components are converted to color-under signals for recording. During playback, the color-under signals are converted up in frequency to provide chrominance components for inclusion in reproduced composite video signals. Additionally, the frequency modulation of the luminance carrier signal is detected to recover folded luminance signals, which are then digitized and filtered to suppress aliases, generating a digital signal for luminance components in reproduced video signals. His invention also ensures backward compatibility of video tape recordings when played back in existing apparatus by de-emphasizing high frequencies during recording and re-emphasizing them during playback.

Another significant patent addresses the de-emphasis and subsequent re-emphasis of high-energy reversed-spectrum components of a folded video signal. This system reproduces a luminance signal from a medium containing a previously recorded luminance signal with a compressed high-frequency portion. It includes a circuit for recovering the luminance signal, filtering to separate low-frequency and high-frequency portions, and boosting the cored high-frequency portion to restore dynamic range and reduce noise. This results in a full-band luminance signal with partially restored dynamic range and minimal visible high-frequency noise.

Career Highlights

Jung Wan Ko is currently employed at Samsung Electronics Co., Ltd., where he continues to innovate in video technology. His work has significantly impacted the way video signals are processed and reproduced, enhancing the quality of video playback systems.

Collaborations

He has collaborated with notable coworkers, including Christopher H. Strolle and Raymond A. Schnitzler, contributing to advancements in video technology.

Conclusion

Jung Wan Ko's contributions to video technology through his innovative patents have