Xiaohan Zhao

Title: Innovations by Xiaohan Zhao

Introduction

Xiaohan Zhao is a prominent inventor based in Shanghai, China. He has made significant contributions to the field of audio signal processing, holding a total of four patents. His work focuses on enhancing audio quality through innovative methods that utilize advanced technology.

Latest Patents

Xiaohan Zhao's latest patents include a system and method for suppressing noise from audio signals. This computer-implemented method employs both statistical noise estimation and neural network noise estimation to achieve superior noise reduction. The process begins with transforming the speech signal from the time domain into the frequency domain. The noise suppression software then determines both a statistical noise estimate and a neural network noise estimate. These estimates are merged to derive a final noise estimate, which is used to refine a noise suppression filter. This filter is applied to the speech signal in the frequency domain, resulting in an enhanced signal that is transformed back into the time domain.

Another notable patent is for digital voice packet loss concealment using deep learning. This method addresses the issue of recovering a current frame of an audio stream when a packet is lost. The process involves detecting the loss of a current packet, which includes an audio signal. It splits preceding frames into high-band and low-band signals, inferring the current low-band signal using a machine-learning model. The inferred low-band signal is then combined with the high-band signals to reconstruct the current frame, which is subsequently added to a playout buffer.

Career Highlights

Xiaohan Zhao is currently employed at Agora Lab, Inc., where he continues to innovate in the field of audio technology. His work has garnered attention for its practical applications in improving audio quality and reliability.

Collaborations

Xiaohan has collaborated with notable colleagues, including Ruofei Chen and Siqiang Yao, who contribute to the dynamic environment of innovation at Agora Lab, Inc.

Conclusion

Xiaohan Zhao's contributions to audio signal processing through his innovative patents demonstrate his expertise and commitment to enhancing audio technology. His work continues to influence the industry and improve user experiences in audio applications.