Ji-Zheng Xu

Title: Innovations of Ji-Zheng Xu in Video Coding

Introduction

Ji-Zheng Xu is a prominent inventor based in Beijing, China. He has made significant contributions to the field of video coding, holding a total of 14 patents. His work focuses on enhancing the efficiency and effectiveness of video encoding processes.

Latest Patents

One of Ji-Zheng Xu's latest patents is titled "Hash-based encoder decisions for video coding." This innovation presents advancements in encoder-side decisions that utilize the results of hash-based block matching. For instance, some innovations involve constructing hash tables that include certain uniform blocks. Additionally, he has developed methods for determining motion vector resolution based on hash-based block matching results. His work also addresses scene change detection, which includes long-term reference picture selection and picture quality assessment during encoding.

Another notable patent is "Unified intra block copy and inter prediction modes." This innovation showcases the unification of intra block copy ('BC') and inter prediction modes. In various implementations, the bitstream syntax and semantics of syntax elements are reused or slightly modified to facilitate intra BC prediction for blocks within a frame. For example, a motion compensation process applies a motion vector indicating displacement within the current picture, which serves as a reference for the motion compensation process. This unification allows for the application of various coding and decoding tools designed for inter prediction mode, simplifying the implementation of intra BC prediction.

Career Highlights

Ji-Zheng Xu is currently associated with Microsoft Technology Licensing, LLC, where he continues to innovate in the realm of video coding technologies. His work has garnered attention for its practical applications and contributions to the industry.

Collaborations

Throughout his career, Ji-Zheng Xu has collaborated with notable colleagues, including Jian Li and Feng Wu. These collaborations have further enriched his research and development efforts in video coding.

Conclusion

Ji-Zheng Xu's contributions to video coding through his innovative patents demonstrate his expertise and commitment to advancing technology in this field. His work continues to influence the way video encoding is approached, making significant strides in efficiency and quality.