Yu Rao

Title: Innovations of Yu Rao in Signal Processing

Introduction

Yu Rao is an accomplished inventor based in Sunnyvale, California. He has made significant contributions to the field of signal processing, particularly in the context of automatic gain control systems. With a total of four patents to his name, Rao's work has had a notable impact on audio and video conferencing technologies.

Latest Patents

One of Yu Rao's latest patents is titled "Long-term signal estimation during automatic gain control." This patent discloses systems and methods for generating a long-term signal level estimate during automatic gain control. In this method, a computing device receives an input signal derived from an upstream input signal. The device selects a first subset of the feed data and divides it into multiple analysis intervals. It then calculates a statistical average for each interval and generates a first Gaussian distribution based on these averages. Using characteristics of this distribution, the device determines the long-term signal level estimate and applies a first stage gain to the input signal.

Another significant patent by Rao is "Two-stage digital automatic gain control." This invention provides systems and methods for automatic gain control in audio and video conferencing applications. The goal is to maintain a predetermined and stable audio level. In this embodiment, a first stage applies a gain based on a long-term estimate of the signal level, while a second stage gain, based on a short-term estimate, assists in achieving the target level. Some embodiments utilize statistical analysis of a buffer to enhance the accuracy of the long-term signal level estimate.

Career Highlights

Yu Rao is currently employed at Zoom Video Communications, Inc., where he continues to innovate in the field of signal processing. His work is crucial in enhancing the quality of audio and video communications, making them more reliable and user-friendly.

Collaborations

Throughout his career, Yu Rao has collaborated with notable colleagues, including Yangzhong Wang and Jianglong Li. These collaborations have contributed to the advancement of technologies in their respective fields.

Conclusion

Yu Rao's contributions to signal processing, particularly in automatic gain control, have established him as a prominent inventor in the technology sector. His patents reflect a commitment to improving audio and video communication systems, showcasing his innovative spirit and technical expertise.