Zhihong Qian

Title: Zhihong Qian: Innovator in Voice-over-IP Technology

Introduction

Zhihong Qian is a prominent inventor based in Shanghai, China. He has made significant contributions to the field of voice-over-IP technology. With a total of 2 patents to his name, Qian's work focuses on enhancing the efficiency and quality of audio communication.

Latest Patents

Zhihong Qian's latest patents include innovative transcoders and mixers designed for voice-over-IP conferencing. These inventions feature reduced algorithmic delay and processing complexity. One of his improved mixers utilizes encoded speech parameters obtained through decoding. This allows a parameter estimator to enhance the encoding process by providing a parameter estimate for the mixed signal. In particular, the mixer employs the principle of strong-pitch-domination for pitch parameters. Additionally, the mixing of wideband signals is simplified by performing mixing of individual lower and upper sub-bands. His transcoders and mixers also convert wideband signals into narrowband signals through high-frequency suppression, and vice versa, using filter combinations.

Career Highlights

Zhihong Qian is currently associated with Nortel Networks Corporation, where he continues to innovate in the field of telecommunications. His work has been instrumental in advancing the technology used in voice-over-IP systems.

Collaborations

Some of his notable coworkers include Rafik Alphonse Goubran and Mohamed Samy El-Hennawey. Their collaborative efforts have contributed to the development of cutting-edge technologies in the industry.

Conclusion

Zhihong Qian's contributions to voice-over-IP technology through his patents and work at Nortel Networks Corporation highlight his role as a key innovator in the field. His advancements continue to shape the future of audio communication.