Company Filing History:
Years Active: 2003-2004
Title: The Innovations of Ernest Pei-Ching Chen
Introduction
Ernest Pei-Ching Chen is a notable inventor based in Gilbert, AZ (US). He has made significant contributions to the field of communications technology, particularly in the areas of echo cancellation and noise suppression. With a total of 2 patents, Chen's work has had a substantial impact on improving voice signal quality in mobile communications.
Latest Patents
Chen's latest patents include a "Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller." This invention focuses on individually selecting step sizes for tap positions of an adaptive filter in an echo canceller, which is crucial for canceling echo signals. The method involves injecting a training signal into the echo canceller during a training interval, allowing the adaptive filter to profile the echo path and generate respective step sizes based on the echo profile.
Another significant patent is the "Method and system for noise suppression using external voice activity detection." This innovation involves a communications transmitter that operates as a mobile telephone and incorporates a noise suppressor to reduce background noise in transmitted voice signals. An external voice activity detector estimates the signal power of the incoming voice signal and compares it to an estimated noise floor, applying a voice activity factor to create a voice activity threshold estimate.
Career Highlights
Ernest Pei-Ching Chen is currently employed at Motorola Corporation, where he continues to develop innovative solutions in the field of telecommunications. His work has been instrumental in enhancing the performance of mobile communication devices.
Collaborations
Throughout his career, Chen has collaborated with notable colleagues, including James Brian Piket and Christopher W Springfield. These collaborations have contributed to the advancement of technology in their respective fields.
Conclusion
Ernest Pei-Ching Chen's contributions to the field of communications through his patents and innovations have significantly improved the quality of mobile communications. His work continues to influence the industry and pave the way for future advancements.