Jianming Liu

Title: Innovations by Jianming Liu in Acoustic Echo Cancellation

Introduction

Jianming Liu is an accomplished inventor based in Irvine, California. He has made significant contributions to the field of acoustic echo cancellation, showcasing his expertise through his innovative patent.

Latest Patents

Jianming Liu holds a patent for "Devices for acoustic echo cancellation and methods thereof." This invention includes a device that features a modulator, a speaker, a microphone, a demodulator, and an adaptive filter. The modulator duplicates a far-end signal to a higher frequency range, generating a first frequency-shifted signal. The speaker then produces a sound signal based on the modulated signal. The microphone captures a near-end signal along with an echo signal, which is a convolution of the sound signal with a room impulse response. The demodulator extracts a demodulated signal and an echo-reference signal from the microphone signal. Finally, the adaptive filter generates a recovered signal to restore the near-end signal using the demodulated signal and the echo-reference signal.

Career Highlights

Jianming Liu is currently employed at Fortemedia, Inc., where he continues to develop innovative solutions in audio technology. His work has been instrumental in advancing the capabilities of acoustic devices.

Collaborations

Jianming collaborates with his coworker, Qing-Guang Liu, contributing to the development of cutting-edge technologies in their field.

Conclusion

Jianming Liu's contributions to acoustic echo cancellation demonstrate his innovative spirit and technical expertise. His patent reflects a significant advancement in audio technology, showcasing the potential for improved communication systems.