Cheung Ayeung

Title: Cheung Ayeung: Innovator in Adaptive Loop Filtering

Introduction

Cheung Ayeung is a notable inventor based in Sunnyvale, CA. He has made significant contributions to the field of video processing through his innovative patent. His work focuses on enhancing the efficiency of video decoders while maintaining high visual quality.

Latest Patents

Cheung Ayeung holds a patent for an "Optimal Separable Adaptive Loop Filter." This invention introduces an adaptive loop filter that utilizes separable filters within a quadtree-based adaptive loop filter (QALF). The approach replaces the filters for at least the P and B pictures with a separable filter, resulting in what is termed Separable QALF (SQALF). The preferred embodiment of the filter employs a Wiener filter as a best fit approximation of the non-separable filter. This innovative method reduces computational complexity in the decoder without compromising perceived visual quality. The estimation of the separable filter is achieved in the encoder by iteratively minimizing the sum of squares error with the separable filter. The SQALF filtering is specifically described within a video decoder.

Career Highlights

Cheung Ayeung is currently employed at Sony Corporation, where he continues to push the boundaries of video technology. His work has been instrumental in developing advanced video processing techniques that are crucial for modern multimedia applications.

Collaborations

Throughout his career, Cheung has collaborated with talented individuals such as Ali Jezu Tabatabai and Minh Do. These partnerships have fostered a creative environment that encourages innovation and the sharing of ideas.

Conclusion

Cheung Ayeung's contributions to adaptive loop filtering exemplify the impact of innovative thinking in technology. His patent for the Optimal Separable Adaptive Loop Filter showcases his commitment to enhancing video processing efficiency.