Alan Wee Chiat Tan

Title: Alan Wee Chiat Tan: Innovator in Voice Activity Detection

Introduction

Alan Wee Chiat Tan is a notable inventor based in Taman Jati, Malaysia. He has made significant contributions to the field of voice activity detection, showcasing his expertise through his innovative patent. His work is particularly relevant in today's technology-driven world, where effective audio processing is essential.

Latest Patents

Alan holds a patent for a "Method and apparatus for voice activity detection." This system filters audio input frames on a frame-by-frame basis through a gammatone filterbank to generate filtered gammatone output signals. A signal energy calculator takes these filtered signals and generates a plurality of energy envelopes. Weighting factors are constructed and applied to each energy envelope, producing a normalized weighted signal that emphasizes voice regions while minimizing noise regions. An entropy measurement is taken to extract information from the normalized weighted signals, generating an entropy signal. This signal is averaged and compared to an adaptive entropy threshold indicative of a noise floor. Decision logic is then used to identify speech and noise based on the comparison of the averaged entropy signal to the adaptive entropy threshold.

Career Highlights

Alan is currently employed at Motorola Solutions, Inc., where he continues to develop and refine his innovative ideas. His work at Motorola has allowed him to contribute to advancements in communication technology, particularly in enhancing voice recognition systems.

Collaborations

Some of Alan's coworkers include Cheah Heng Tan and Wei Qing Ong. Their collaboration has likely fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Alan Wee Chiat Tan is a prominent figure in the field of voice activity detection, with a patent that highlights his innovative approach to audio processing. His contributions at Motorola Solutions, Inc. reflect his commitment to advancing technology in meaningful ways.