Yushin Cho

Title: Yushin Cho: Innovator in Video Processing Technologies

Introduction

Yushin Cho is a notable inventor based in Sunnyvale, CA, who has made significant contributions to the field of video processing. With a total of 3 patents to his name, Cho has developed innovative methods that enhance video encoding and image compression.

Latest Patents

One of Cho's latest patents is titled "Adaptive preprocessing method using feature-extracted video maps." This invention describes a method and apparatus for preprocessing a video signal before it is encoded. During this preprocessing phase, features are extracted from the video signal into feature planes, which are adaptively filtered based on estimations of feature activity. The remaining signal, after feature extraction, undergoes noise filtering to eliminate a substantial portion of noise. The feature planes and remaining signal are then recombined into a preprocessed output signal, which is optimized for processing by a video encoder. This method allows encoders to generate higher quality and/or lower bit rate encoded video compared to those using the original source video. It is particularly effective with encoders designed to remove temporal and/or spatial redundancy, such as those following the MPEG2/4 or AVC/H.264 standards.

Another significant patent by Cho is the "Target bit rate decision method for wavelet-based image compression." This invention outlines a method for determining a target bit rate for wavelet-based image encoding based on wavelet coefficients. The method aims to maintain high-quality images by establishing minimum and maximum target bit rates. It calculates a pseudo code length corresponding to these bit rates as a function of the wavelet coefficients. A curve is derived between the pseudo code length and target bit rate, with the slope of the curve depending on buffer fullness. This allows for the optimal use of computing resources to achieve consistent quality across different image blocks.

Career Highlights

Throughout his career, Yushin Cho has worked with prominent companies such as Sony Corporation and Sony Electronics Inc. His experience in these organizations has contributed to his expertise in video processing technologies.

Collaborations

Cho has collaborated with talented individuals in the field, including Daisuke Hiranaka and Jeongnam Youn. These collaborations have likely enriched his work and led to further advancements in his inventions.

Conclusion

Yushin Cho's innovative contributions to video processing and image compression have established him as a significant figure in the